CN1182652A - Method for making joint screw of steel bar end and mfg. device thereof - Google Patents
Method for making joint screw of steel bar end and mfg. device thereof Download PDFInfo
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- CN1182652A CN1182652A CN 96114740 CN96114740A CN1182652A CN 1182652 A CN1182652 A CN 1182652A CN 96114740 CN96114740 CN 96114740 CN 96114740 A CN96114740 A CN 96114740A CN 1182652 A CN1182652 A CN 1182652A
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- steel bar
- bar end
- joint screw
- cavity
- die
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Abstract
The making method consists of the following steps: the end of the steel bar is made into a revolving body, the steel bar is held in such manner that the degree of freedom of the axial movement is maximum. The steel bar end is inserted in to the revolving body shaped cavity inscribed by at least three screw-thread rollers. With the aid of the turning of the turntable connected with at least three screw-thread rollers and wit hthe aid of the feeding force between the steel bar and the turntable, the screw-thread rollers are made to thread on the outer circular face of the steel bar end. Said method can preserve the hardened layer of the whole steel bar and can harden the threaded surface secondly, and the bottom of the threaded tooth is relative large.
Description
The present invention relates to a kind of manufacture method and manufacturing installation thereof of construction site joint screw of steel bar end.
In the construction site, often two reinforcing bars are implemented mechanical connection.In the prior art, adopt thread connecting mode morely, no matter be taper thread or cylindrical thread, all adopt the manufacture of machining, and machining directly causes dwindling of reinforcing bar external diameter, the diminishing of stressed cross section, and reinforcing bar epidermis hardened layer is removed in cutting, the substitute is softer internal layer, these all make the reinforcing bar bearing capacity descend.
The objective of the invention is to overcome weak point of the prior art, and the manufacture method and the manufacturing installation thereof of the stronger joint screw of steel bar end of a kind of screw thread bearing capacity of processing are provided.
The objective of the invention is to realize by following approach.
The manufacture method of joint screw of steel bar end, comprise the steps, through base material reason circle device steel bar end is processed into the single-revolution body, to keep the mode clamping reinforcing bar of reinforcing bar axial freedom at the most, steel bar end is inserted by in the revolution bodily form cavity that is cut at least three cylindrical die rolls, through rotating the rotating disk be connected with at least three cylindrical die rolls and, making cylindrical die roll at steel bar end outer peripheral face rolled thread through between rotating disk and reinforcing bar, applying axial feed power.
Purpose of the present invention can also realize by following approach.
Said axial feed power is to obtain with respect to the inclination of reinforcing bar axial line and through the axial thrust load that cylindrical die roll produced that rotates with the steel bar end interlock through the cylindrical die roll groove.
Said axial feed power is to apply via promoting the rotating disk of bearing on guide rail.
Said axial feed power also can be via promoting bearing on guide rail and sting the chuck that blocks reinforcing bar and apply.
Become the mode of revolving body (as conical or cylindrical) a lot of the steel bar end perimeter treatment, adopt the mode of machining in the prior art usually.These prior aries all can be applicable among the present invention.But we think that adopting following steps is preferably with the mode that steel bar end is processed into revolving body:
Prepare a kind of final mould structure that becomes a full circle capable of being combined of the upper bolster and the section of die shoe and upper cavity and lower mode cavity that comprises, steel bar end is put into the die cavity of the suitable mould structure of said full circle bore and steel bar end, make steel bar end and final full circle die cavity phase conjugate through the upper and lower die holder of pressing, handle the mould limit that upper and lower mould is fitted and produced.
The mode of handling the mould limit is a lot, adopts the mode of excision in the prior art usually.
The applicant thinks that the step on this processing mould limit is preferably: be pulled away from upper and lower die holder, make steel bar end rotate 90 ° relative to die cavity, the upper and lower die holder of pressing makes steel bar end and final full circle die cavity phase conjugate once more.
It is said that to make steel bar end rotate 90 ° relative to die cavity be to obtain by rotating steel bar end.
The manufacturing installation of joint screw of steel bar end, comprise base material reason circle device and thread preparing device, its structural feature is: thread preparing device comprises at least three to have cylindrical die roll that revolution bodily form inscribe cavity distributes, to be connected with cylindrical die roll and core has the rotating disk of through hole, the driver that the driving rotating disk rotates, sting the chuck and the base of steel-fastening muscle, rolled thread gear teeth portion has the awl that is pressed into that can implement axial feed.
All cylindrical die rolls are isometrical, etc. lead angle and along same circumference uniform distribution.
Base top has lower guideway, and chuck is bearing on the base by the upper rail with the lower guideway pairing.
Base top has lower guideway, and driver and rotating disk are bearing on the base by the upper rail with the lower guideway pairing.
Preferably a kind of reason round belting of colding pressing of base material reason circle device comprises upper bolster, die shoe, the framed and device for exerting that makes upper and lower die holder close up and separate, the final full circle that becomes capable of being combined of upper cavity and lower mode cavity.
Said device for exerting can be a kind of helical structure, also can be a kind of hydraulic means.
In sum, the present invention has following advantage compared to existing technology: process the connecting thread of steel bar end in the mode of colding pressing, not only kept reinforcing bar epidermis hardened layer, and in cold pressure procedure, the steel bar end surface is again through 2 underhardenings; Simultaneously, the cold presswork of chipless, not only can not dwindle the reinforcing bar external diameter, and the fin of reinforcing bar periphery and reinforcing bar body are through pressing the circle kneading again, make the external diameter of steel bar end that increase is slightly arranged on the contrary, thereby the footpath is close with the external diameter of reinforcing bar body at the bottom of making the tooth of joint screw of steel bar end, and experimental data shows, the middle footpath of the joint screw of steel bar end that processes through this method of colding pressing of the present invention equates with the external diameter of reinforcing bar body.Therefore, use method and apparatus of the present invention the joint screw of steel bar end of on-the-spot processing have stronger bearing capacity.
Accompanying drawing 1 is the structural representation of thread preparing device in the joint screw of steel bar end manufacturing installation of the present invention.
Accompanying drawing 2 is schematic diagrames that expression is pressed into cone-shaped
Accompanying drawing 3 is that A is to view
Accompanying drawing 4 is B-B cutaway views
Accompanying drawing 5 is structural representations of base material reason circle device in the joint screw of steel bar end manufacturing installation of the present invention.
Below we carry out more detailed description to the present invention in conjunction with the accompanying drawings.
Most preferred embodiment:
The manufacture method of joint screw of steel bar end comprises the steps:
Prepare a kind of by upper bolster 6 and die shoe 7 the final mould structure that becomes a full circle capable of being combined of that be combined into and upper cavity 61 and lower mode cavity 71,
Steel bar end is put into the die cavity of the said full circle bore mould structure suitable with it,
Make steel bar end and final full circle die cavity phase conjugate through the upper and lower die holder 6,7 of pressing,
Be pulled away from upper and lower die holder 6,7, rotate steel bar end and make its relative die cavity half-twist,
The upper and lower die holder 6,7 of pressing makes steel bar end and final full circle die cavity phase conjugate once more,
Sting reinforcing bar with chuck 4 cards, and only keep the reinforcing bar axial freedom,
Steel bar end is inserted by in the tubaeform cavity that is cut at least three cylindrical die rolls 1,
Rotate the rotating disk 2 that is connected with at least three cylindrical die rolls 1,
Promote the chuck 4 of bearing on guide rail obtaining initial axial feed power,
Through the screw thread snap-in of cylindrical die roll 1 with steel bar end, and through all cylindrical die rolls in the same way, the axial thrust load that produces with the rotation of the relative workpiece of lead angle to be to obtain axial feed power, like this, just can apply axial feed power separately again, can obtain the connecting thread of steel bar end.
The manufacturing installation of joint screw of steel bar end is made up of base material reason circle device and thread preparing device.
With reference to accompanying drawing 1, accompanying drawing 3 and accompanying drawing 4, thread preparing device is made up of Thread rolling head 1, rotating disk 2, driver 3, chuck 4 and base 5 etc., cylindrical die roll 1 isoperimetric that three isometrical grooves are helix is distributed on the rotating disk 2, and in the same way, same lead angle; Rotating disk 2 is actually a kind of scroll chuck, every claw 21 is with by bolt 22 and its affixed clamping plate 23 cylindrical die roll 1 clamping being bearing between the two, but cylindrical die roll 1 rotation, rotating disk 2 cores have can be by the through hole of reinforcing bar, and rotating disk 2 rear ends are connected with driver 3 outputs; Driver 3 bottoms and base 5 are affixed, and the chuck 4 of stinging reinforcing bar in order to card also is a kind of scroll chuck, and chuck 4 is bearing on the tailstock 9, and tailstock 9 bottoms have upper rail, the lower guideway pairing on this upper rail and base 5 tops.Tailstock 9 bottoms are connected with a tooth bar 91, be bearing on the base 5 by axle 93 with tooth bar 91 meshed gears 92, axle 93 1 ends are connected with handgrip 94 by jaw clutch, when realizing that with cylindrical die roll 1 reinforcing bar of interlock can obtain axial feed power by the rotating disk 2 that rotates, handgrip 94 can be pulled out, disengage with axle 93.
With reference to accompanying drawing 5, base material reason circle device comprises the upper bolster 6 with upper cavity 61, the die shoe 7 with lower mode cavity 71, framed and device for exerting 8.Device for exerting 8 is a kind of hydraulic jack, be positioned at die shoe 7 belows, push rod 81 contacts with die shoe 7: framedly be made up of upper plate 10 and traveller 11, traveller 11 lower ends and hydraulic jack are affixed, the upper end is then by helicitic texture and 10 fastening connections of upper plate, upper and lower die holder 6 is slidingly connected by the chute and the traveller 11 of both sides, and is clamped between left and right two travellers 11.Shadoof 12 is fastenedly connected with upper bolster 6; Under upper and lower die holder 6, the 7 applying situations, the elastic modelling quantity that should be taken into account the workpiece of pressing when a full circle is determined the bore of this full circle is formed in upper and lower die cavity 61,71 cross sections.
Claims (10)
1. the manufacture method of joint screw of steel bar end is characterized in that, comprise the steps,
Through base material reason circle device steel bar end is processed into the single-revolution body,
Keeping the mode clamping reinforcing bar that reinforcing bar moves axially the free degree at the most,
Steel bar end is inserted by in the revolution bodily form cavity that is cut at least three cylindrical die rolls (1),
Through rotating the rotating disk (2) be connected with at least three cylindrical die rolls (1) and, making cylindrical die roll (1) at steel bar end outer peripheral face rolled thread through between rotating disk (2) and reinforcing bar, applying axial feed power.
2. the manufacture method of joint screw of steel bar end according to claim 1, it is characterized in that said axial feed power is to obtain with respect to the inclination of reinforcing bar axial line and the axial thrust load that produced through the cylindrical die roll (1) that rotates with the steel bar end interlock through cylindrical die roll (1) groove.
3. the manufacture method of joint screw of steel bar end according to claim 1 is characterized in that, said axial feed power is via promoting bearing on guide rail and sting the chuck (4) that blocks reinforcing bar and apply.
4. the manufacture method of joint screw of steel bar end according to claim 1 is characterized in that, steel bar end is processed into revolving body comprises the steps,
Prepare a kind of final mould structure that becomes a full circle capable of being combined of upper bolster (6) and die shoe (7) and upper cavity (61) and the section of lower mode cavity (71) that comprises,
Steel bar end is put into the die cavity of the said full circle bore mould structure suitable with it,
Make steel bar end and final full circle die cavity phase conjugate through the upper and lower die holder of pressing (6,7),
Handle upper and lower mould in conjunction with the mould limit that produces.
5. the manufacture method of joint screw of steel bar end according to claim 4 is characterized in that, the step of handling the mould limit is,
Be pulled away from upper and lower die holder (6,7), make steel bar end rotate 90 ° relative to die cavity,
The upper and lower die holder of pressing (6,7) makes steel bar end and final full circle die cavity phase conjugate once more.
6. the manufacture method of joint screw of steel bar end according to claim 5 is characterized in that, said to make steel bar end rotate 90 ° relative to die cavity be to obtain by rotating steel bar end.
7. the manufacturing installation of joint screw of steel bar end, comprise base material reason circle device and thread preparing device, it is characterized in that, thread preparing device comprises at least three cylindrical die rolls (1) that distribute to have revolution bodily form inscribe cavity, be connected with cylindrical die roll (1) and core has the rotating disk (2) of through hole, drive the driver (3) of rotating disk (2) rotation, sting the chuck (4) and the base (5) of steel-fastening muscle, cylindrical die roll (1) tooth portion has the awl that is pressed into that can implement axial feed.
8. the manufacturing installation of joint screw of steel bar end according to claim 7 is characterized in that, all cylindrical die rolls (1) are isometrical, etc. lead angle and along same circumference uniform distribution.
9. the manufacturing installation of joint screw of steel bar end according to claim 7 is characterized in that, base (5) top has lower guideway, and chuck (4) is bearing on the base (5) by the upper rail with the lower guideway pairing.
10. the manufacturing installation of joint screw of steel bar end according to claim 7, it is characterized in that, base material reason circle device is a kind of reason round belting of colding pressing, comprise upper bolster (6), die shoe (7), framed, and the device for exerting (8) that makes upper and lower die holder (6,7) close up and separate, the final full circle that becomes capable of being combined of upper cavity (61) and lower mode cavity (71).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN96114740A CN1077816C (en) | 1996-11-20 | 1996-11-20 | Method for making joint screw of steel bar end and mfg. device thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN96114740A CN1077816C (en) | 1996-11-20 | 1996-11-20 | Method for making joint screw of steel bar end and mfg. device thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1182652A true CN1182652A (en) | 1998-05-27 |
| CN1077816C CN1077816C (en) | 2002-01-16 |
Family
ID=5122281
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN96114740A Expired - Fee Related CN1077816C (en) | 1996-11-20 | 1996-11-20 | Method for making joint screw of steel bar end and mfg. device thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1077816C (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101831990B (en) * | 2009-03-09 | 2013-01-09 | 储宏道 | Rebar rounding rolling straight thread connector and processing equipment thereof |
| TWI610012B (en) * | 2015-11-24 | 2018-01-01 | Threaded planting device and forming method thereof | |
| CN108000400A (en) * | 2017-12-28 | 2018-05-08 | 重庆臻展热处理有限公司 | A kind of convenient spindle clamping unit adjusted |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2225318Y (en) * | 1995-05-16 | 1996-04-24 | 上海钢铁工艺技术研究所 | Thread rolling mill for steel bar end connection |
-
1996
- 1996-11-20 CN CN96114740A patent/CN1077816C/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101831990B (en) * | 2009-03-09 | 2013-01-09 | 储宏道 | Rebar rounding rolling straight thread connector and processing equipment thereof |
| TWI610012B (en) * | 2015-11-24 | 2018-01-01 | Threaded planting device and forming method thereof | |
| CN108000400A (en) * | 2017-12-28 | 2018-05-08 | 重庆臻展热处理有限公司 | A kind of convenient spindle clamping unit adjusted |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1077816C (en) | 2002-01-16 |
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