CN1775464A - Method for manufacturing prestress ground tackle clamping piece by hot extrusion - Google Patents
Method for manufacturing prestress ground tackle clamping piece by hot extrusion Download PDFInfo
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- CN1775464A CN1775464A CN 200510122879 CN200510122879A CN1775464A CN 1775464 A CN1775464 A CN 1775464A CN 200510122879 CN200510122879 CN 200510122879 CN 200510122879 A CN200510122879 A CN 200510122879A CN 1775464 A CN1775464 A CN 1775464A
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Abstract
The present invention provides a thermal extrusion method for manufacturing prestressed anchor device intermediate plate by using thermal extrusion as main process and using small quantity of mechanical machining measure as auxiliary process. It includes the following main steps: cutting raw material, thermally upsetting blank and extruding central screw hole, normalizing, cutting bottom, finishing external cone and two end faces, machining internal screw-thread, finally dividing it into two plates.
Description
Technical field
The present invention relates to a kind of manufacture method of pre-stress anchor clipper, especially a kind of hot-extrusion production method of pre-stress anchor clipper
Background technology
Pre-stress anchor clipper is widely used in road, the bridge, and along with the construction of all kinds of overpass, high-grade highway in recent years is increasing, its demand is quite huge.The pre-stress anchor clipper of China is processed with structural alloy steel at present, and there is a through hole saw shape tooth thread at its center, and the outside is cone shape, and the endoporus of the small end of cone part has one section outside tapering.Specific requirement has: the hole, footpath, the end of male cone (strobilus masculinus) and precessing saw shape tooth thread needs concentric (axiality should below 0.05), hole, footpath, the end roughness of male cone (strobilus masculinus) and screw thread requires Ra less than 0.8, screwed hole does not allow the local material that lacks, aperture error is in 0.05, in case cause the generation of saw shape screw thread agomphosis and tack tooth.Product material needs internal organizational structure even, fine and smooth, does not after heat treatment allow to occur crackle and snaggletooth.Its effect is bridge and builds when using the presstressed reinforcing steel anchoring that the steel wire after the stretch-draw, steel hinge line are fixed on the anchoring part by anchor slab with intermediate plate, and the saw shape screw thread in the intermediate plate is bitten steel wire or steel strand wires, so the precision of double thread and requirement of strength are very strict.Its concrete specification requirement and test parameters can be referring to the regulations of GB/T14370-2000 national standard.
The manufacture method that the present manufacturing firm of China generally adopts pre-stress anchor clipper is with the big end size of bar turning to cone, car male cone (strobilus masculinus) and both ends of the surface again, and spermiation car surplus, slightly bore the center thread Pilot hole then, the aperture that gets out is less than the required thread Pilot hole size of reality, finish reaming thread Pilot hole with bottoming reamer again, is benchmark with the thread Pilot hole, big end size of finish turning cone or rounding cone and male cone (strobilus masculinus).Such processing method not only operation is various, and big to waste of raw materials.The equipment dynamic waste is big on the one hand, particularly adopt and finish ream the method machining screw bottom outlet in hole, because the swing of cutter and wearing and tearing cause pore size inconsistent easily, and feed velocity can not be fast, to prevent cutter band material, if raw material hardness is on the low side, it is more serious that cutter then is with material when finish reaming endoporus, and the inaccessible designing requirement of endoporus roughness.On the other hand because this product is a cone, select for use the round bar that surpasses the cone outside diameter to add man-hour, the raw material of conical section must all machine away, so processing capacity is very big during turning cone position, waste of raw materials (endoporus material and male cone (strobilus masculinus) material) is serious.
Summary of the invention
The objective of the invention is at machining steps in the existing pre-stress anchor clipper manufacturing many, complex procedures, precision is difficult to guarantee that it is a kind of based on hot extrusion that the problem that waste of raw materials is big provides, and is aided with the hot-extrusion production method of the pre-stress anchor clipper of a small amount of machining.
Technical scheme of the present invention is:
A kind of hot-extrusion production method of pre-stress anchor clipper is characterized in that it may further comprise the steps:
(a) raw material cut off, and the clavate raw material are positioned on knife edge die or the cutting machine cut off, and obtain blank;
(b) heating is with above-mentioned blank heating to 900～1200 ℃;
(c) hot rammer profile taper and center thread Pilot hole, place mould to push the blank after the above-mentioned heating, the material at blank center is upwards flowed along the outer cone wall, in blank, be formed centrally the band centre bore at the end, profile is tapered, obtains the taper blank at the bottom of the pore area of center;
(d) normalizing has after above-mentioned heat upset and cools to normal temperature with the furnace after taper blank at the bottom of the center pore area of 600-800 ℃ of surplus temperature places incubator to be incubated 60～120 minutes;
(e) cut at the end, utilize taper blank that mould obtained (c) step and at the bottom of the center pore area after (d) step normalizing to carry out the die-cut taper blank that centre bore connects that obtains;
(f) shaping places shaping mould to carry out shaping together with plug in the centre bore of the taper blank that the centre bore of step gained connects before will inserting with the plug that final finished centre bore profile matches and obtains appearance and size and the satisfactory semi-finished product of centre bore;
(g) inner bolt hole processing forms internal thread with the semi-finished product after the above-mentioned shaping by screw tap cutting or fashion of extrusion, obtains tapped semi-finished product;
(h) cut, the method for above-mentioned semi-finished product by machining cut into two promptly get pre-stress anchor clipper finished product of the present invention.
The base thickness of the taper blank at the bottom of the pore area of described center is smaller or equal to 3mm.
Beneficial effect of the present invention:
1, the present invention is by adopting hot extrusion molding processing pre-stress anchor clipper new technology, utilize frock on very low power forcing press, to produce the machining that substitutes lathe, drilling machine, produce the size unification of product because of adopting the frock straight forming, can significantly reduce the intermediate detection number of times, class's output of every day can increase more than 40%, and producing cost descends more than 15%.
2, the present invention uses the raw material of original cutting tip fully by adopting hot extrusion molding explained hereafter pre-stress anchor clipper, and the utilization rate of material improves more than 15%.Add hot extrusion technique production owing to adopt, product after the extruding directly enters incubator, eliminate the internal stress of semifinished material, the raw material internal organizational structure is changed, guarantee that product percent of pass after the heat treatment is more than 99.98%, every performance requirement of security compliance GB/T14370-2000 defined, pass the test rate are 100%.
3, method is simple, and the equipment input is little, can be realized by suitable technological transformation, and the qualification rate of product and uniformity have had the change of essence than pure machining.
Description of drawings
Fig. 1 is that pre-stress anchor clipper raw material of the present invention cuts off the mould schematic diagram.
Fig. 2 is the bad mould schematic diagram of pre-stress anchor clipper heat rammer of the present invention.
Fig. 3 is a pre-stress anchor clipper hot extrusion screwed hole of centre mould schematic diagram of the present invention.
Fig. 4 is that pre-stress anchor clipper of the present invention is cut the bottom die schematic diagram.
Fig. 5 is a pre-stress anchor clipper integer mould schematic diagram of the present invention.
Fig. 6 is the pre-stress anchor clipper schematic diagram that utilizes method processing gained of the present invention.
The specific embodiment
The present invention is further illustrated below in conjunction with drawings and Examples.
Shown in Fig. 1～5.
The manufacture method of present embodiment can be summarized as: raw material cut off, hot pier base shape extruding screwed hole of centre, cut the end, finishing shape outer cone and both ends of the surface, machining internal thread, be decomposed into 2 at last, just will cut off the back raw material and be heated to 900 ℃-1200 ℃, hot rammer profile taper and center thread Pilot hole, the centre bore material is up flowed along the outer cone wall, centre bore bottom residual wall thickness≤3m, the 3mm left and right sides clout that the bottom is left is cut the end, the shaping plug is put into the semi-finished product that squeeze good hole, carry out shaping with forcing press, in forming process, the side force of process tapering is included on the moulding plug its material tightly and forms inner cone, carries out final machined internal thread after the normalizing and cut getting final product.Details are as follows:
1, raw material cut off: former bar material is put into die shown in Figure 12, front end leans on the plane of locating piece 3, along with moving down of punch 1, raw material are cut into the blank of certain-length, finish this procedure, the length of blank can be calculated definite according to the external diameter of the volume of final formed product and bar, is slightly larger than the volume of final formed product with the volume of the bar cut.Also can adopt other method to carry out the preparation of blank during concrete enforcement as method such as shearing, machine is cut.
2, heat rammer hair is bad: the blank that is heated to 900～1200 ℃ of requirements is placed on the counterdie shown in Figure 26, and along with forcing press down moves, blank is imported in the dies 5 by die plate insert 4, because concave die cavity is taper, material is by the sidewall flow forming.When forcing press is up, product is made product leave die by last dnockout 7 through the dnockout rod effect of lathes, enter in the die shown in Figure 39, along with forcing press down, by punch 8 and the effect that plays core 10, push stock,, the material of endoporus is up instead flowed through sidewall because the blank outer ring is contained to live by die 9 tightly, when forcing press is up, product is played core 10 and is ejected die 9, makes product throw off punch 8 through stripper 11, finishes this procedure.The heating of blank can adopt conventional firing equipment to heat in this step, is generally heat time heating time 20～60 minutes.
3, normalizing, the semi-finished product that have the heat rammer gained of 600-800 ℃ of surplus temperature after above-mentioned heat upset cool off with stove after sending into and being incubated 60～120 minutes in the incubator, reach the materials microstructure that changes finished product by surplus temperature normalizing, improve the purpose of material physical property.
4, cut at the end: the product behind the above-mentioned crowded hole is enclosed within on the punch 12, along with forcing press down moves, by the stamping-out of die 13 with punch 12 bottom that is not expressed to the end is cut, product is driven punch 12 by the effect holder of stripper 14, finishes this procedure.As shown in Figure 4.
5, shaping: plug 15 is filled in above-mentioned not with together putting in the blank at the end on the punch 16, along with forcing press moves downward, by the squeezing action of punch 16 with die 17, raw material is inwardly shunk, form internal taper, when forcing press was up, product withdrawed from by the dnockout rod of lathe, finishes this procedure.
6, machining: adopt conventional female thread machining method (as screw tap cutting or fashion of extrusion) to obtain tapped semi-finished product, utilize machine cuts method cutting processing finally to obtain as shown in Figure 6 finished product again.
Eventually the above material that utilizes the method for hot extrusion that former centre bore need be excised flows and add to that to save material in the wall thickness be the place of key of the present invention when reducing machining steps.
Claims (2)
1, a kind of hot-extrusion production method of pre-stress anchor clipper is characterized in that it may further comprise the steps:
(a) raw material cut off, and the clavate raw material are positioned on knife edge die or the cutting machine cut off, and obtain blank;
(b) heating is with above-mentioned blank heating to 900～1200 ℃;
(c) hot rammer profile taper and center thread Pilot hole, place mould to push the blank after the above-mentioned heating, the material at blank center is upwards flowed along the outer cone wall, in blank, be formed centrally the band centre bore at the end, profile is tapered, obtains the taper blank at the bottom of the pore area of center;
(d) normalizing cools to normal temperature with the furnace after placing incubator to be incubated 60～120 minutes the taper blank at the bottom of the pore area of above-mentioned center;
(e) cut at the end, utilize taper blank that mould obtained (c) step and at the bottom of the center pore area after (d) step normalizing to carry out the die-cut taper blank that centre bore connects that obtains;
(f) shaping places shaping mould to carry out shaping together with plug in the centre bore of the taper blank that the centre bore of step gained connects before will inserting with the plug that final finished centre bore profile matches and obtains appearance and size and the satisfactory semi-finished product of centre bore;
(g) inner bolt hole processing forms internal thread with the semi-finished product after the shaping by screw tap cutting or fashion of extrusion, obtains tapped semi-finished product;
(h) cut, the method for above-mentioned semi-finished product by machining cut into two promptly get pre-stress anchor clipper finished product of the present invention.
2, the hot-extrusion production method of pre-stress anchor clipper according to claim 1, the base thickness that it is characterized in that the taper blank at the bottom of the pore area of described center is smaller or equal to 3mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005101228798A CN100391689C (en) | 2005-12-06 | 2005-12-06 | Method for manufacturing prestress ground tackle clamping piece by hot extrusion |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005101228798A CN100391689C (en) | 2005-12-06 | 2005-12-06 | Method for manufacturing prestress ground tackle clamping piece by hot extrusion |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1775464A true CN1775464A (en) | 2006-05-24 |
| CN100391689C CN100391689C (en) | 2008-06-04 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2005101228798A Expired - Fee Related CN100391689C (en) | 2005-12-06 | 2005-12-06 | Method for manufacturing prestress ground tackle clamping piece by hot extrusion |
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| CN (1) | CN100391689C (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102554090A (en) * | 2012-02-17 | 2012-07-11 | 四川新筑精坯锻造有限公司 | Forging method for forming through holes of working clamping plates by hot extrusion |
| CN102690996A (en) * | 2012-06-01 | 2012-09-26 | 内蒙古包钢钢联股份有限公司 | High-temperature seamless ferritic alloyed steel and production method thereof |
| CN114260647A (en) * | 2021-11-10 | 2022-04-01 | 上海浦江缆索股份有限公司 | Processing method of prestressed clamping piece |
| CN117403828A (en) * | 2023-10-19 | 2024-01-16 | 南通邦固工程技术有限公司 | Construction and manufacturing method of axial bearing type anchorage device |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3183402B1 (en) * | 1999-12-17 | 2001-07-09 | アンダーソンテクノロジー株式会社 | Structure of PC steel stranded wire connection and its construction method |
| CN2448892Y (en) * | 2000-11-13 | 2001-09-19 | 柳州欧维姆建筑机械有限公司 | Tool anchor clamp |
| CN1180897C (en) * | 2001-12-24 | 2004-12-22 | 张有龙 | Novel process for machining clamp for prestressed tendon |
| CN1180898C (en) * | 2001-12-24 | 2004-12-22 | 张有龙 | New technology for processing flat anchor plate for prestressed tendon |
| CN1219140C (en) * | 2003-04-04 | 2005-09-14 | 晖毅预力器材股份有限公司 | Method for raising strength of clip, clip-squeezing cover and anchor head structure |
| CN1265904C (en) * | 2003-11-14 | 2006-07-26 | 阚柳凤 | Anchorage device clamping piece blank cold extrusion process |
| CN1686628A (en) * | 2005-04-25 | 2005-10-26 | 彭军 | Cold extrusion shaping method of prestressed anchor jaw |
-
2005
- 2005-12-06 CN CNB2005101228798A patent/CN100391689C/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102554090A (en) * | 2012-02-17 | 2012-07-11 | 四川新筑精坯锻造有限公司 | Forging method for forming through holes of working clamping plates by hot extrusion |
| CN102690996A (en) * | 2012-06-01 | 2012-09-26 | 内蒙古包钢钢联股份有限公司 | High-temperature seamless ferritic alloyed steel and production method thereof |
| CN114260647A (en) * | 2021-11-10 | 2022-04-01 | 上海浦江缆索股份有限公司 | Processing method of prestressed clamping piece |
| CN117403828A (en) * | 2023-10-19 | 2024-01-16 | 南通邦固工程技术有限公司 | Construction and manufacturing method of axial bearing type anchorage device |
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| Publication number | Publication date |
|---|---|
| CN100391689C (en) | 2008-06-04 |
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Granted publication date: 20080604 Termination date: 20111206 |