CN1286597C - Extrusion molding method of self-locking nut - Google Patents
Extrusion molding method of self-locking nut Download PDFInfo
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- CN1286597C CN1286597C CN 200310103515 CN200310103515A CN1286597C CN 1286597 C CN1286597 C CN 1286597C CN 200310103515 CN200310103515 CN 200310103515 CN 200310103515 A CN200310103515 A CN 200310103515A CN 1286597 C CN1286597 C CN 1286597C
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- pod
- nut
- bead
- blank
- mould
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- 238000000034 method Methods 0.000 title claims abstract description 54
- 238000001125 extrusion Methods 0.000 title claims abstract description 14
- 238000004080 punching Methods 0.000 claims abstract description 33
- 239000011324 bead Substances 0.000 claims description 41
- 238000007493 shaping process Methods 0.000 claims description 22
- 230000015572 biosynthetic process Effects 0.000 claims description 8
- 230000007306 turnover Effects 0.000 claims 1
- 238000005520 cutting process Methods 0.000 abstract description 7
- 239000008188 pellet Substances 0.000 abstract 5
- 238000009966 trimming Methods 0.000 abstract 1
- 239000000463 material Substances 0.000 description 18
- 238000004519 manufacturing process Methods 0.000 description 15
- 238000010586 diagram Methods 0.000 description 10
- 239000011265 semifinished product Substances 0.000 description 7
- 238000000465 moulding Methods 0.000 description 5
- 238000010079 rubber tapping Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 235000019994 cava Nutrition 0.000 description 1
- 238000010273 cold forging Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 238000005242 forging Methods 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
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Abstract
An extrusion forming method of a self-locking nut is to use a die to perform the following steps on a nut forming machine: cutting a blank pellet; trimming the cut blank pellets into a predetermined size; a flange preforming step of forming a flange preform on one end surface of the trimmed blank pellet; a flange adjusting and tooth forming process for further adjusting the flange prototype of the blank pellet to a fixed length and forming a series of teeth on the periphery of the flange along the axial direction; the blank pellets formed by the above process are subjected to a punching process for forming through holes in the axial direction and forming the through holes into threads, and the self-locking nut can be produced at high speed in a material-consuming manner by matching the die according to the above method.
Description
Technical field
The present invention relates to a kind of forming method that pushes nut, refer to a kind of cold-forge forming method of self lock nut especially, can be with feed consumption mode high-speed production self lock nut.
Background technology
Known in the art is that self lock nut is used to be installed on grappling place that is spirally connected that screw is provided on the metallic sheet material, and the fixing member of institute's desire can be fixed on the metallic plate.A kind of known self lock nut, shown in Figure 13 and 14, mainly comprise a nut body 101 ' and grappling bead 102 '.Wherein nut body 101 ' and grappling bead 102 ' inside make to have the internal thread hole 103 that runs through ' with screw-on place as the screw (not shown).In addition, nut body 101 ' top end face 104 ' formation one shoulder and along bead 102 ' circumferential outer surface form tooth portion 105 in upright arrangement '.As shown in figure 14, desire with this fixed by nut a metallic plate 106 ' on the time, need earlier metallic plate 106 ' on make a through hole, make its diameter and bead 102 ' go up work have the recess diameter of tooth portion 105 ' locate suitable.So, when with bead 102 ' pour facing to the metallic plate through hole, can via bead 102 ' enhanced deformation, with metallic plate 106 ' be clipped in top end face 104 ' shoulder on, and can be not again from axially the skidding off of through hole, and by tooth in upright arrangement portion 105 ' with the metallic plate through hole between frictional force stop nut body 101 ' metallic plate 106 ' through hole in rotation arbitrarily.
To so far, the manufacture method of relevant this self lock nut, most convenient for utilizing one piece one piece ground manufacturing of hexagonal automatic lathe.Well imagine, need be with the method manufacturing of this type of cutting way through material working angles slowly, its speed of production is slow, and per minute only reaches 7.But the use amount of self lock nut is very big, improves output as desire, needs the automatic lathe of the large quantities of high prices of increasing purchase.In addition, because of needs carry out the material cutting so there is waste material to produce, so also increased cost of material.So produce self lock nut with automatic lathe, because of have speed of production slowly, production equipment cost height and the high problem of cost of material, cause its price height, competitiveness poor.
Summary of the invention
For overcoming the defective of prior art, the object of the present invention is to provide and a kind ofly make the continuously extruding and molding method of self lock nut in the cold forging mode, not only can improve speed of production widely, and waste cut materials is few, so reduce production costs with can being multiple.
According to method provided by the present invention, its manufacturing step mainly comprises: cut out the blank ball, and in the feed-in mould; Make the blank ball in mould, experience punching course is repeatedly repaired its coarse appearance surfaces and is had smooth surface, becomes the blank ball semi-finished product of preliminary dimension; At this half-finished end face, drawing one bead blank in a mould; With the semi-finished product of tool bead blank, punching press in a mould on the one hand with the bead setting, is placed at the excircle of bead simultaneously and is formed tooth portion in upright arrangement; Wear axially the blank ball being dashed of stock ball, form axial through hole; And tapping forms screw thread on the inwall of through hole.
According to method provided by the present invention, can utilize general nut shaping machine commonly used to finish each pressing steps of the present invention, speed of production is fast, reach per minute and reach 50 more than the finished product, and consumable material (being the material that known technology machines away) is 1/5th of a known automatic lathe.So utilize method provided by the present invention to compare with conventional method, not only the production equipment fixed cost is low, and can improve speed of production again and reduce cost of material.
Description of drawings
Fig. 1 makes the process flow diagram flow chart of self lock nut with the extrusion forging means for the present invention.
The blank ball schematic diagram of Fig. 2 for cutting off out from metal material dish unit volume.
Fig. 3, Fig. 4, Fig. 5 are respectively the blank ball carries out three processes of contouring in mould schematic diagram.
Fig. 6 is the schematic diagram of blank ball preformed bead blank in mould of being formed by Fig. 5.
Fig. 7 further adjusts the schematic diagram of bead and formation tooth portion for blank ball shown in Figure 6.
Fig. 8 is for going out the blank ball of Fig. 7 in the schematic diagram of through hole.
Fig. 9 gives the schematic diagram that tapping forms internal thread for the through hole with Fig. 8.
Figure 10 is finishing Fig. 3,4,5 the used mould schematic diagram of blank ball.
Figure 11 is the schematic diagram in order to the mould that forms the blank ball with bead blank shown in Figure 6.
Figure 12 is in order to form the schematic diagram with mould of setting bead and tooth portion blank ball shown in Figure 7.
Figure 13 is the schematic isometric of known self lock nut.
Figure 14 is for being pressed into self lock nut shown in Figure 13 schematic sectional view on the metallic plate.
The specific embodiment
The following describes the extrusion process of self lock nut provided by the present invention.
At first, please refer to Fig. 1, the extrusion process of self lock nut of the present invention comprises: (1) blank ball cutting-off process, on raw metal dish unit volume, cut off out the blank ball; (2) dressing process is swaged into preliminary dimension and outward appearance has smooth surface with the blank ball through extruding; (3) bead preformed process, through the finishing after the blank ball on, the nut body that is shaped, and on an end face of this body preform one bead blank; (4) bead adjustment and tooth in upright arrangement portion forming process will have the size of setting through preformed bead extrusion molding, and be simultaneously, around bead, a series of directly to tooth portion in axial formation; (5) punch process is axially gone out through hole along the blank ball; And (6) tapping process, at the inwall formation tooth line of through hole.The enforcement of relevant above-mentioned each process sincerely illustrates it according to following example.
Embodiment
The enforcement of above-mentioned each process of relevant the present invention is to utilize known nut shaping machine to carry out, and is about to the blank ball and finishes through a series of mould in regular turn.
(1) the blank ball cuts process
According to the intrinsic cutting machine on nut shaping machine, on raw metal dish unit volume, cut out the blank ball 1 of fixed length, as shown in Figure 2.
(2) dressing process
Please refer to shown in Figure 10ly, finishing molding die 2 has three, is installed in regular turn on the work station of first, second and third stroke of nut shaping machine.Each mould 2 has: a nut pod 2a, and its size cooperates punching pin 11a (please refer to Fig. 3) on, and blank ball 1 promptly is fed in it by nut shaping machine; Pod 2b once is in order to cooperate punching pin 11b (please refer to Fig. 3) down.Wherein go up punching pin 11a, following punching pin 11b can be relatively moved in the mould 2 that is installed in the first stroke work station by the nut shaping machine effect, therefore, the blank balls in the feed-in mould 21 is done punching press for the first time, becomes the first blank ball 1a.As shown in Figure 3, punching pin 11b goes out a recess 1 ' a under in the lower surface of this first blank ball 1a, its purpose is to cause the material of blank ball 1 to make plasticity laterally to flow, consistent with the inner wall shape of the pod 2a of mould 2, make the blank ball have smooth surface, simultaneously, also can on blank ball 1, make preform in advance and will address the preparation of making screwed hole thereafter.
Then, by the nut shaping machine intrinsic material returned and feed mechanism, with this first blank ball 1a clamping and do 180 degree upsets, be fed in the mould 2 that is fixed on the second stroke work station place same configuration, and by last punching pin 11 ' a as shown in Figure 4, following punching pin 11 ' b, further, form the second blank ball 1b with this first blank ball 1a punching press.Punching press at this second stroke work station becomes the second blank ball 1b, and the shape of its bottom 1 ' b has been extruded consistent with the bottom shape of the pod 2a of mould 2, and simultaneously, the recess 1 ' a on the first blank ball 1a is further as plutonic recess 1 " a.
Thereafter, again by the nut shaping machine intrinsic material returned and feed mechanism, this second blank ball 1b is done 180 degree upsets, be fed in the mould 2 of the 3rd stroke work station place same configuration, " a; following punching pin 11 " b further is stamped to form the 3rd blank ball 1c with this second blank ball 1b and by going up punching pin 11 as shown in Figure 5.At this moment, also consistent in the shape of bottom 1 ' c of the 3rd blank ball 1c with the bottom shape of the pod 2a of mould 2.So the 3rd blank ball 1c that is become after this three punching presses, its overall appearance size has been finished setting value, has level and smooth outward appearance and reaches in the formation of upper/lower terminal face to the recess 1 that caves in " a, 1 " c.
So far,, after the punching press of having experienced first, second and third press work station is forged, finished the dressing process of blank ball 1, made the blank ball 1c semi-finished product of having repaired, will enter bead preformed process by initial blank ball 1.
(3) bead preformed process
Please refer to Figure 11, the mould 3 that bead preformed process is used, the nut pod 3a that it is inner, following pod 3b with the finishing molding die 2 roughly the same, its do not exist together for fillet R2 big than the R1 of mould 2.This mould 3 is fixed on the four-stroke-cycle work station of nut shaping machine, reaches the last punching pin 12a that is cooperated with nut pod 3a respectively by the nut shaping machine effect, and the following punching pin 12b that cooperates with following pod 3b relatively moves in mould 3.
The blank ball 1c semi-finished product that in dressing process, are squeezed into, present in the mould 3 that so far is fixed on the four-stroke-cycle work station through 180 degree upsets by the material returned and the feed mechanism of nut shaping machine again, after punching press, shape by R2, preformed one has the blank ball 1d of bead 1 ' d on the front end face of this blank ball 1c, as shown in Figure 6.Obviously as can be known, the blank of this bead 1 ' d system is via the shape on punching pin 12b top and the extruding of going up punching pin 12a down, and the plasticity that forces blank ball material flows and forms.The recess of the upper and lower end face of blank ball 1d is further deepened by upper and lower punching pin simultaneously.
(4) bead adjustment and tooth portion forming process
Bead adjustment and tooth portion forming process are to realize with adjustment mould 4 as shown in figure 12.This mould 4 and above-mentioned two journey moulds do not exist together for, on the inwall of pod 4b down, form tooth portion 401 axially in upright arrangement.Mould 4 is fixed on the 5th stroke work station of nut shaping machine, and punching pin 13a, following punching pin 13b move in mould 4 in the nut shaping machine effect.Blank ball 1d in the formation of four-stroke-cycle work station, after passing on so far in the mould 4 by the material returned of interior nut shaping machine and feed mechanism, via last punching pin 13a, the punching press of punching pin 13b down, make the blank of the bead 1 ' d on the blank ball 1d further make plastic flow through extending to preseting length in the pod 4b down, simultaneously via the tooth portion 401 on the following pod 4b, form the 1 ' e of tooth portion in upright arrangement in this bead 1, become blank ball 1e as shown in Figure 7.Compare with the blank ball 1d semi-finished product of Fig. 6, more deepen in the recess depths of blank ball 1e upper/lower terminal face.
(5) punch process
Blank ball 1e in the shaping of the 5th stroke work station, do 180 degree upsets via the nut shaping machine material returned and feed mechanism again, become bead state up, deliver in the mould (not shown) that is fixed on the six-stroke work station, and by as shown in Figure 8 last punching pin 14a, the recess of blank ball 1e is run through, form a through hole 101.So form blank ball 1f semi-finished product, collect by the material returned on the nut shaping machine.
Via above process of the present invention, so far finished the extrusion modling face shaping of self lock nut.In addition, though each step illustrate respectively, be to carry out synchronously in regular turn on nut shaping machine.
(6) tapping process
Thereafter, with the molded blank ball 1f semi-finished product of collecting, as shown in Figure 9, with known tapping machine 102, through hole 101 in formation internal thread hole 103 has finally been finished the self lock nut 1g goods of extruding, moulding.
Self lock nut for the big pulling force of needs, stock ball 1g that also can be after moulding, bead 1 ' d tip edge is done further increasing of part cutting forms a horn shape 1 " e, and can add the difficult ability that is drawn out again in the interior back of opening that big nut 1g pours metallic plate.
In sum, utilize the extrusion process of self lock nut of the present invention, needn't utilize Expensive production equipment can improve the speed of production of self lock nut widely; Simultaneously, subtract Lacked the cutting of raw material, reduced jointly cost of material, be one and have the industry exploitation value The invention of value.
Claims (5)
1. the extrusion process of a self lock nut, on a nut shaping machine, utilize mould to carry out the following step:
(1) cuts out the process of a blank ball;
(2) with the blank ball that cuts into, turn over turnback and enter in regular turn in the finishing shaping dies, carry out recontour and become the dressing process of preliminary dimension;
(3) the blank ball after will repairing turns over turnback and enters in the preformed mould of bead, forms the bead preform process of a bead blank in an end face;
(4) with the bead blank of blank ball, in bead adjustment and tooth portion forming mould, further be adjusted to measured length, and on the periphery of bead, axially form the bead adjustment and the tooth portion forming process of tooth portion in upright arrangement along it;
(5) the blank ball that will be formed by said process in the punch process of axial formation through hole, and forms screw thread with through hole.
2. the extrusion process of self lock nut as claimed in claim 1, wherein this finishing shaping dies includes the nut pod and reaches the following pod that is communicated with it, the nut pod cooperates punching pin on, following pod cooperates punching pin, the horizontal section form fit of the horizontal section shape of nut pod and self-locking a chain for binding criminals cap body, and the horizontal section shape of following pod and the bead horizontal section form fit of self lock nut.
3. the extrusion process of self lock nut as claimed in claim 2, wherein the nut pod becomes a cambered surface with following pod contact-making surface.
4. the extrusion process of self lock nut as claimed in claim 1, the mould that wherein forms the bead preformed process of bead blank comprises, the nut pod reaches pod down, the horizontal section shape of nut pod and the horizontal section form fit of self lock nut body, and the nut pod becomes a cambered surface with following pod contact-making surface, but its radius is big than the cambered surface radius of the mould of dressing process, and cooperates punching pin at the nut pod, cooperates punching pin at following pod.
5. the extrusion process of self lock nut as claimed in claim 1, wherein the mould of bead adjustment and tooth portion forming process comprises nut pod and pod down, is formed with axial tooth in upright arrangement portion on the inwall of pod down.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200310103515 CN1286597C (en) | 2003-11-05 | 2003-11-05 | Extrusion molding method of self-locking nut |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200310103515 CN1286597C (en) | 2003-11-05 | 2003-11-05 | Extrusion molding method of self-locking nut |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1613572A CN1613572A (en) | 2005-05-11 |
| CN1286597C true CN1286597C (en) | 2006-11-29 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200310103515 Expired - Fee Related CN1286597C (en) | 2003-11-05 | 2003-11-05 | Extrusion molding method of self-locking nut |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1286597C (en) |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102009006326A1 (en) * | 2009-01-27 | 2010-07-29 | Flaig, Hartmut | Method for producing an internal thread element, internal thread element and screw connection |
| CN102554111A (en) * | 2012-01-31 | 2012-07-11 | 中国重汽集团济南动力有限公司 | Novel extrusion process for hexagonal shouldered self-locking nut |
| CN102601294B (en) * | 2012-04-01 | 2014-11-05 | 常熟新华远紧固件有限公司 | Die assembly for forming bottom of spring washer nut |
| CN104439910B (en) * | 2014-09-22 | 2016-06-15 | 中航动力株洲航空零部件制造有限公司 | Hexagonal flattens the blank extrusion process of closing in self-locking nut |
| CN105710255A (en) * | 2016-04-20 | 2016-06-29 | 国网上海市电力公司 | Machining technology of antitheft nut of 35KV outdoor upper rod platform support |
| CN106914582A (en) * | 2017-03-15 | 2017-07-04 | 温州市强邦实业有限公司 | A kind of axis nut impact extrusion shapes technique |
| CN108188303B (en) * | 2017-12-28 | 2019-08-27 | 温州市金盛紧固件有限公司 | The processing technology of anti-loosing nut |
-
2003
- 2003-11-05 CN CN 200310103515 patent/CN1286597C/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CN1613572A (en) | 2005-05-11 |
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