CN1117121A - A selflock bolt, a process for producing the selflock bolt, and a dice used directly in the working of the process invention - Google Patents
A selflock bolt, a process for producing the selflock bolt, and a dice used directly in the working of the process invention Download PDFInfo
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- CN1117121A CN1117121A CN 94109551 CN94109551A CN1117121A CN 1117121 A CN1117121 A CN 1117121A CN 94109551 CN94109551 CN 94109551 CN 94109551 A CN94109551 A CN 94109551A CN 1117121 A CN1117121 A CN 1117121A
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- self
- locking
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Abstract
The self-locking screw bolt has a common thread part and a self-locking thread part with slit on the top of thread. During prodn, after the multiple thread part is chased, at least two screw teeth are connected with thread die of the same pitch to chase the self-locking thread part while the common thread part is chased. On the thread die, there are multiple thread die part to form the multiple thread, and the last thread die part to form the self-locking thread part and the common thread part simultaneously.
Description
The present invention relates to a kind of self-locking screw, its manufacture method of the self-locking thread portion that prevents bolt looseness and roll die that is used for this manufacturing of on the part of bolt axis, being formed with.
For preventing bolt looseness, people once proposed various methods since past, for example, adopt crooked packing ring, the method of locking wire, pass the method that the cotter pin of bolt combines with the groove that forms on hexagon nut, employing is provided with the method for the nut (band teeth nut) or the packing ring (profile of tooth lock washer) of the tooth of engaging-in fastener surface of contact, adopt the method for dual nut, adopt the method for special nut, employing clamping between the worm tooth of nut has the method for the lining nylon nut of soft materials such as nylon, after fastening, coat the method for locking coating, or the like, these all are known.
Adopt the method for above-mentioned crooked packing ring, locking wire, grooved hexagonal nut and cotter pin etc., exist bothersome, the inefficient problem of its operation.
And, adopt band teeth nut and methods such as profile of tooth lock washer, dual nut and special nut, there is the anxiety of impossible repeated use and damage fastener material surface of contact, so that out of use situation occurs.In addition, adopt the nut be lined with soft materials such as nylon and the method for coating locking coating, the problem that also exists the problem of heat resistance aspect and cost to uprise etc.
The present invention is directed to above-mentioned these problems, its 1st purpose is to provide the self-locking screw that has slit on a kind of its tip of thread, and firmly diminishing when making it fastening, fastening operability are forged a good relationship.The 2nd purpose of the present invention is to provide the manufacture method of self-locking screw.In addition, the 3rd purpose of the present invention is to be provided for the roll die of this manufacturing.
According to the present invention, above-mentioned the 1st purpose is to realize by the self-locking screw with following characteristics, promptly this self-locking screw has on screw spindle part the regular screw threads portion that shape in the shape of a spiral forms, and with above-mentioned regular screw threads portion the self-locking thread portion that is formed with slit on the tip of thread of identical pitch is arranged.
, be provided with each 1 section of regular screw threads section and self-locking thread section here, the regular screw threads section is placed on forward end for well.In this case, the regular screw threads section is located in the minimum zone of some pitch parts, the self-locking thread section only is located within some pitch parts of nearly bolt head side.
Above-mentioned the 2nd purpose realizes by self-locking screw manufacture method of the present invention, this self-locking screw has in the regular screw threads portion that forms of shape and be formed with the self-locking thread portion of slit on the tip of thread in the shape of a spiral on the bolt axial region, it is characterized in that described self-locking screw manufacture method has following operation:
A. on the part of bolt axial region, carry out thread rolling to form multiple thread portion;
B. utilize roll die, gather,, also rub regular screw threads portion simultaneously to rub self-locking thread portion by at least 2 worm tooths in the multiple thread portion that will have this pitch with its pitch mould portion identical with the pitch of multiple thread portion.
Above-mentioned the 3rd purpose is to realize by the roll die that manufacturing self-locking screw of the present invention is used, it is characterized in that, this roll die is formed with along the thread rolling direction: in order on the part of bolt axial region, rubbing the multiple thread mould portion of multiple thread portion, and in order at least 2 worm tooths of above-mentioned multiple thread portion are gathered to rub self-locking thread portion, to rub the final die portion of regular screw threads portion simultaneously with the pitch identical with above-mentioned multiple thread portion.
Drawing is simply described as follows:
Fig. 1 (A) and (B) be the manufacturing view midway and the view of its employed roll die that shows an embodiment of the present invention;
Fig. 2 (A) and (B) are the view of the manufacturing that shows the present invention this identical embodiment state when finishing and the view of its employed roll die;
Fig. 3 is a manufacturing procedure picture;
Fig. 4 is a manufacturing procedure picture;
Fig. 5 is the partial enlarged drawing of completed bolt;
Fig. 6 (A) and (B) be the view that shows other embodiment;
Fig. 7 is the view that shows other embodiment of roll die.
Below in conjunction with accompanying drawing embodiments of the invention are described.
Please refer to Fig. 1 to Fig. 5.In Fig. 3, label 10 is bolt blanks, and bolt head 14 utilizes formation on bolt axial region 12 such as cold forging.16, the 16th, the phase I roll die forms plate shaped roll die (flat die roll) or circular roll die (thread rolling roller).For example, for dull and stereotyped roll die, shown in Fig. 1 (B), like that, be formed with in thread rolling direction (left and right directions on the figure) and go up the multiple thread mould portion 18 of extending.
This multiple thread mould portion 18 is in the helical pitch amount of the relative worm tooth of the external diameter L (=2 π r, wherein r is the radius of bolt axial region 12) of screw spindle part 12, be that incision is formed with 2 worm tooths in the pitch p.Promptly constitute the roll die that processing 2 head threads are used.Can certainly be formed in the worm tooth of incision more than 3 in 1 pitch p.
If be pressed on the bolt axial region 12 as shown in Figure 3 the roll die 16,16 in the 1st stage and reverse mutually moving, will on nearly bolt head 14 1 sides of bolt axial region 12, rub bull (2) screw section 20 shown in Fig. 1 (A) like that.On the bolt axial region 12A of the multiple thread portion 20 that forms in this wise, then utilize the 2nd stage roll die 22,22 to carry out thread rolling processing.
On the 2nd stage roll die 22, shown in Fig. 2 (B), be formed with final die portion 24,26, its pitch p is identical with the pitch p of the multiple thread mould portion 18 of multiple thread portion 20.The worm tooth of final die portion 24 and multiple thread portion 20 matches every 1, and 2 worm tooths are gathered, and the worm tooth of pitch p is out of shape.
Its result is formed with slit 28 as shown in Figure 5 on the top of this worm tooth, made self-locking thread portion 30.Final die portion 26 is in regular screw threads portion 32 that the nearby distolateral pitch that is shaped of bolt axial region 12A is p.Like this, just finished as Fig. 2 (A) and self-locking screw 34 shown in Figure 5, it is formed separately out regular screw threads portion 32 and self-locking thread portion 30 in the forward end of bolt axial region 12 and a side of nearly bolt head 14.
According to present embodiment, owing to include self-locking thread portion 30 and regular screw threads portion 32 on bolt axial region 12, compare with the complete section situation of all making self-locking thread portion 30, become very little in the torque of carrying out when fastening, just can carry out fastening like a cork.And owing to be provided with regular screw threads portion 32 in forward end, when being screwed into nut one side, can easily insert, be difficult for taking place owing to tilt bolt is screwed into the disadvantage that makes the worm tooth damage.Slit 28 can form continuously, also can form intermittently.
Fig. 6 illustrates other embodiment.Bolt 34A among Fig. 6 (A), only 2 to 3 pitch in forward end partly form the 32A of regular screw threads portion, then form the 30A of self-locking thread portion of sufficient length at the remaining part of forward end.Thereby can realize easily being screwed among the nut and can bring into play the self-locking function fully, to prevent the loosening of bolt really.
Bolt 34B among Fig. 6 (B), nearly bolt head 14 sides form the 30B of self-locking thread portion of 2 to 3 pitch parts.Thereby the time marquis that the 32B of regular screw threads portion with forward end is screwed into, available little power is screwed into it, only in the end the 30B of self-locking thread portion just is necessary to use big fastening force when fastening.So just can carry out fastening efficiently.
Fig. 7 illustrates the another kind of embodiment of roll die.This roll die 40, the right side is formed with the 1st stage roll die 16 shown in above-mentioned Fig. 1 (B) in the drawings, and the left side then is formed with the 2nd stage roll die 22 shown in above-mentioned Fig. 2 (B) in the drawings.
Thereby with this roll die 40 with per two as one group, bolt axial region 12 is clamped in therebetween (referring to Fig. 3), the right of roll die 40 in Fig. 7 moved, at first by the 1st stage roll die 16 multiple thread portion 20 (referring to Fig. 1 (A)) that is shaped, go down continuously, the multiple thread portion at two is combined and form self-locking thread portion 30 and regular screw threads portion 32 (with reference to Fig. 2 (A)) by the 2nd stage roll die 22.Therefore, adopt this roll die 40, can in an operation, make bolt of the present invention efficiently.
The invention of being put down in writing in the claim 1, as described above owing to have self-locking thread portion and regular screw threads portion, can carry out with little power fastening, good operability, and operating efficiency height.
Here, one section regular screw threads portion and self-locking thread portion are set respectively, make regular screw threads portion be formed on forward end, just can easily be screwed among nut one side.This situation can make regular screw threads portion only be formed in some pitch parts of forward end, and self-locking thread portion only is formed in some pitch parts of the first side of nearly bolt.
Claims (7)
1. self-locking screw is characterized in that this self-locking screw has on screw spindle part the regular screw threads portion that shape in the shape of a spiral forms, and with above-mentioned regular screw threads portion identical pitch is arranged, is formed with the self-locking thread portion of slit on the tip of thread.
2. self-locking screw according to claim 1 is characterized in that being formed with at least each one section regular screw threads portion and self-locking thread portion, is formed with at least one section above-mentioned regular screw threads portion on the forward end of bolt axial region.
3. self-locking screw according to claim 2 is characterized in that regular screw threads portion only is formed in some pitch parts of forward end.
4. self-locking screw according to claim 2 is characterized in that self-locking thread portion only is formed in the some pitch part of near side of bolt axial region.
5. self-locking screw according to claim 1, the slit that it is characterized in that self-locking thread portion are to form continuously.
6. self-locking screw manufacture method, this self-locking screw have in the regular screw threads portion that forms of shape and be formed with the self-locking thread portion of slit on the tip of thread in the shape of a spiral on the bolt axial region, it is characterized in that described self-locking screw manufacture method has following operation:
A. on the part of bolt axial region, carry out thread rolling to form multiple thread portion;
B. utilize roll die, gather,, also rub regular screw threads portion simultaneously to rub self-locking thread portion by at least 2 worm tooths in the multiple thread portion that will have this pitch with its pitch mould portion identical with the pitch of multiple thread portion.
7. make the roll die that self-locking screw is used, it is characterized in that, this roll die is formed with along the thread rolling direction: in order on the part of bolt axial region, rubbing the multiple thread mould portion of multiple thread portion, and in order at least 2 worm tooths of above-mentioned multiple thread portion are gathered to rub self-locking thread portion, to rub the final die portion of regular screw threads portion simultaneously with the pitch identical with above-mentioned multiple thread portion.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 94109551 CN1117121A (en) | 1994-08-13 | 1994-08-13 | A selflock bolt, a process for producing the selflock bolt, and a dice used directly in the working of the process invention |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 94109551 CN1117121A (en) | 1994-08-13 | 1994-08-13 | A selflock bolt, a process for producing the selflock bolt, and a dice used directly in the working of the process invention |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1117121A true CN1117121A (en) | 1996-02-21 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 94109551 Pending CN1117121A (en) | 1994-08-13 | 1994-08-13 | A selflock bolt, a process for producing the selflock bolt, and a dice used directly in the working of the process invention |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1117121A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1325190C (en) * | 2003-03-24 | 2007-07-11 | 株式会社产学连携机构九州 | Method and device for manufacturing bolt, screw rolling die used therefor, and multiple screw bolt |
| CN100446914C (en) * | 2003-04-28 | 2008-12-31 | 株式会社产学连携机构九州 | Method of producing thread-rolling die |
| CN1945030B (en) * | 2006-10-26 | 2010-09-01 | 贵州凯星液力传动机械有限公司 | Method for processing high accuracy high strength bolt |
| CN102900741A (en) * | 2011-07-28 | 2013-01-30 | 株式会社友荣精密 | Coupling screw, manufacturing method thereof and thread forming plates of coupling screw |
| CN103418719A (en) * | 2012-05-22 | 2013-12-04 | 东莞诚兴五金制品有限公司 | Screw thread and pattern rolling plate and method for thread and pattern rolling |
-
1994
- 1994-08-13 CN CN 94109551 patent/CN1117121A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1325190C (en) * | 2003-03-24 | 2007-07-11 | 株式会社产学连携机构九州 | Method and device for manufacturing bolt, screw rolling die used therefor, and multiple screw bolt |
| CN100446914C (en) * | 2003-04-28 | 2008-12-31 | 株式会社产学连携机构九州 | Method of producing thread-rolling die |
| CN1945030B (en) * | 2006-10-26 | 2010-09-01 | 贵州凯星液力传动机械有限公司 | Method for processing high accuracy high strength bolt |
| CN102900741A (en) * | 2011-07-28 | 2013-01-30 | 株式会社友荣精密 | Coupling screw, manufacturing method thereof and thread forming plates of coupling screw |
| CN103418719A (en) * | 2012-05-22 | 2013-12-04 | 东莞诚兴五金制品有限公司 | Screw thread and pattern rolling plate and method for thread and pattern rolling |
| CN103418719B (en) * | 2012-05-22 | 2015-06-17 | 东莞诚兴五金制品有限公司 | Screw thread and pattern rolling plate and method for thread and pattern rolling |
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| WD01 | Invention patent application deemed withdrawn after publication |