CN1284643C - Cold-pressing technology for making equistrength archor arm and its end - Google Patents
Cold-pressing technology for making equistrength archor arm and its end Download PDFInfo
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- CN1284643C CN1284643C CN 01135516 CN01135516A CN1284643C CN 1284643 C CN1284643 C CN 1284643C CN 01135516 CN01135516 CN 01135516 CN 01135516 A CN01135516 A CN 01135516A CN 1284643 C CN1284643 C CN 1284643C
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- rod
- rib
- cold
- millimeters
- rolling
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- 238000003825 pressing Methods 0.000 title claims abstract description 23
- 238000005516 engineering process Methods 0.000 title claims abstract description 19
- 229940104796 equistrength Drugs 0.000 title 1
- 238000003672 processing method Methods 0.000 claims abstract description 17
- 238000005096 rolling process Methods 0.000 claims abstract description 14
- 238000000034 method Methods 0.000 claims abstract description 11
- 238000005098 hot rolling Methods 0.000 claims abstract description 3
- 239000002184 metal Substances 0.000 claims description 7
- 229910052751 metal Inorganic materials 0.000 claims description 7
- 210000003205 muscle Anatomy 0.000 claims description 4
- 230000015556 catabolic process Effects 0.000 claims description 3
- 238000001125 extrusion Methods 0.000 claims description 3
- 230000001360 synchronised effect Effects 0.000 claims description 3
- 229910000831 Steel Inorganic materials 0.000 claims description 2
- 239000010959 steel Substances 0.000 claims description 2
- 230000008030 elimination Effects 0.000 claims 1
- 238000003379 elimination reaction Methods 0.000 claims 1
- 239000000463 material Substances 0.000 abstract description 9
- 101100334009 Caenorhabditis elegans rib-2 gene Proteins 0.000 abstract description 8
- 230000000694 effects Effects 0.000 abstract description 5
- 238000004873 anchoring Methods 0.000 abstract description 4
- 238000005097 cold rolling Methods 0.000 abstract description 3
- 238000003754 machining Methods 0.000 abstract description 3
- 238000005065 mining Methods 0.000 abstract description 2
- 230000002349 favourable effect Effects 0.000 abstract 1
- 230000005540 biological transmission Effects 0.000 description 3
- 239000003795 chemical substances by application Substances 0.000 description 3
- 238000003756 stirring Methods 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 230000007812 deficiency Effects 0.000 description 2
- 239000012141 concentrate Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 238000005482 strain hardening Methods 0.000 description 1
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Abstract
The present invention relates to a support technique for exploiting mine resources, which particularly to a cold pressing head equal strength anchor rod for supporting an anchor rod in an underground mining tunnel and a machining method thereof. The cold pressing head equal strength anchor rod has a rod body 1, wherein an axial spiral rib 2 is arranged on the rod body 1. Base materials of a cold rolling anchor rod body and a hot rolling anchor rod body are machined by a cold (rolling) pressing head facility by cold (rolling) pressing technology; the end head of a unidirectional spiral anchor rod without longitudinal bars is eliminated, coldly (rolled) pressed into a circle, wherein the end head is from 70 to 150mm; a cylindrical rod body which meets the technical requirement of rolling threads is machined, and standard metric threads are rolled through the thread rolling technology. The anchor rod has the advantages that the gripping force of the rod body is favorable, the strength is high, the transfer effect of anchoring force and bearing capacity is well enhanced, etc. The processing method of the end head of the anchor rod has the advantages that the material loss and the strength loss in the machining process can be reduced; the strength of the end head is equal to about 95 % of the tensile strength of base materials of the anchor rod body; the equal strength of the anchor rod is basically realized; the stress concentration phenomenon can be eliminated; the integrated strength of the anchor rod is enhanced by 15 to 25 %.
Description
Technical field
The present invention relates to mine resources exploitation support technology, is a kind of processing method that is used for the first-class strong anchor pole of colding pressing of underground mining roadway bolt supporting.
Background technology
It is the vertical muscle of unidirectional left-handed nothing that existing anchor pole is generally body of rod rib, obtained the better effects of supporting through many improvement, but find in practice, still there is more deficiency in existing anchor bar body: during full anchor, the anchoring agent confiscates that the effect bond stress not good enough, the body of rod that stirs is poor slightly, the pitch of rib, highly, bigger than normal, the body of rod of angle, weight circle, easily make anchor pole advance that rotary resistance is big, power easily is delivered on the rib, and make anchor pole pass the anchoring agent often to reduce stirring action, cause anchor force not good enough.Simultaneously, the termination 100-150mm section of existing anchor bar body must be processed as international thread, to match with the anchor pole cap.And existing termination screw thread has cold and hot two kinds of processing methods usually: 1, anchor bar body end machining section employing turning process is disappeared rib, car circle make it to become the cylindrical body of rod, to satisfy the specification requirement of subsequent processing.This operation loss anchor bar body parent material makes the body of rod diameter after the processing reduce 1-2mm than body of rod mother metal internal diameter, the more cylindrical body of rod is extracted international thread, effectively to cooperate with the anchor pole nut.This operation is lost the work piece parent material once more, and the thread segment internal diameter is reduced more than the 2mm again.This processing method has reduced the thread segment net sectional area, and then the 15-25% of loss anchor pole mother metal tensile strength, and makes anchor pole in use form stress to concentrate and at first destroy.2, hot worked deficiency is, produces iron scale, expands with heat and contract with cold and cause extensions, cylinder thinner than the mother metal body of rod, and scale error is bigger than normal, is difficult to realize that anchor bar body etc. by force.
Summary of the invention
The objective of the invention is, a kind of processing method of the first-class strong anchor pole of colding pressing is provided, so that material unaccounted-for (MUF) and loss of strength in the minimizing process, improve the structure of anchor bar body rib, adapt to cold-press process, improve anchor bar body bulk strength and performance, anchor pole is had the following advantages: body of rod bond stress is better, the intensity height, and can better improve transmission effects of anchor force and bearing capacity etc.The processing method of anchor pole is had the following advantages: can reduce material unaccounted-for (MUF) and loss of strength in the process, make the intensity of termination reach 95% of anchor bar body mother metal tensile strength, basic realization anchor poles etc. are strong, and the concentration phenomenon that can eliminate stress, and improve anchor pole bulk strength 15-25%.
The present invention is in order to solve the problem at prior art place, adopt following scheme to solve, it has the body of rod 1, processing axial screw type rib 2 on the body of rod 1, it is with colding pressing a facility with the employing cold-press process on the hot-rolled and cold-rolled anchor bar body, being about to 70-150 millimeter one-way spiral does not have the vertical muscle termination point of anchor rod rib circle of colding pressing that disappears, be processed as the cylindrical body of rod that satisfies the rolled thread specification requirement, go out international thread by the rolling of rolled thread technology again.Rib 2 on the body of rod 1 is full spirality heat along the body of rod and pricks one, and hot rolling bad mold joint 3 is less than or equal to 2 millimeters, and body of rod diameter is 22 millimeters of Φ 20-Φ, pitch L
2Be the 14-18 millimeter, the high L of rib is the 0.6-1.2 millimeter, rib width L
1It is the 2-2.6 millimeter.The body of rod diameter ratio that the screw type rib is one section is cold-pressed into cylindrical body of rod diameter only greater than 0.15-0.6 millimeter pressure head surplus or equal.Rib 2 on the body of rod 1 is full screw type heat along the body of rod and pricks one, and it is 1.5 millimeters that heat is pricked bad mold joint 3, and the body of rod 1 diameter is 21.6 millimeters of Φ, pitch L
2Be 14 millimeters, the high L of rib is 1.1 millimeters, rib width L
1It is 2.2 millimeters.Rib 2 on the body of rod 1 is full screw type cold breakdown one along bar, with round steel after the cold-drawn, adopts wheel is rolled out rib, and no bad mold joint, the body of rod 1 diameter are 20.6 millimeters of Φ, the high L0.8 millimeter of rib, rib width L
11.8 millimeter, pitch L
2It is 8 millimeters.Adopt the cold pressure processing technology that the termination of the anchor bar body rib that disappears is pressed circle, be processed as and satisfy cylindrical that the rolled thread technology requires, go out international thread by the rolling of rolled thread technology again, the concrete roller that adopts rotates rolling, push termination point of anchor rod, by driving wheel 4 drivening rods 5, draw, promote escapement 6 driving gear nipper wheels 7 by pivot angle, move with cold roll 8 synchronous operations, the body of rod 1 rotates and axially swings reciprocating extrusion with roll 8, in roll 8 circular grooves, eliminate rib 2 under the extruding, form one section cylindrical, go out international thread by the rolling of rolled thread technology again.The whole process of this method are no turning cold working, body of rod mother metal material is not lost at processed position, the sectional area diameter of the cylindrical body of rod after cold rolling is round as a ball is less than 0.3-0.6mm, and its thread segment tensile strength on average reaches 95% of anchor bar body mother metal tensile strength after rolled thread again.
Anchor pole of the present invention has following advantage: during installation, can confiscate and stir the anchoring agent, the propelling rotary resistance is little, body of rod bond stress is good, intensity is high, improved the transmission effects of the transmission power of anchor force and bearing capacity, power can be delivered on the body of rod, bearing strength is improved, save rod body material, cost is lower.Anchor pole processing method of the present invention has the following advantages: can reduce material unaccounted-for (MUF) and loss of strength in the female bar process of anchor pole, make the intensity of termination reach about 95% of anchor pole mother metal tensile strength, substantially realized that anchor pole etc. is strong, eliminated that stress is concentrated and the brittle failure phenomenon has improved anchor pole bulk strength 15-25%.
Description of drawings
Accompanying drawing 1 is the present invention's first-class strong anchor structure schematic diagram of colding pressing.
Accompanying drawing 2 is the present invention's realize colding pressing structural representations of processing method of first-class strong anchor pole.
The specific embodiment
Accompanying drawing 1 is the first-class strong anchor pole of colding pressing of the present invention, 1 is the body of rod among the figure, processing axial screw type rib 2 on the body of rod 1, that is: unidirectional left-handed nothing is indulged the muscle anchor pole, the diameter of the body of rod 1 has many specifications, usually in 22 millimeters scopes of Φ 20-Φ, for example the body of rod 1 diameter can be the specification of 21.6 millimeters of Φ, 20.6 millimeters of Φ etc.When the rib on the anchor bar body 2 when the body of rod is full screw type heat and pricks one, it is 1.5 millimeters that heat is pricked bad mold joint 3, the diameter of the body of rod 1 is 21.6 millimeters of Φ, pitch L
2Be 14 millimeters, the high L of rib is 1.1 millimeters, rib width L
2It is 2.2 millimeters.When the rib on the anchor rod body 1 when the body of rod is full screw type cold breakdown body, no bad mold joint, the body of rod 1 diameter are 20.6 millimeters of Φ, the high L0.8 millimeter of rib, rib width L
11.8 millimeter, pitch L
2It is 8 millimeters.The rolled thread diameter generally in M22.6 * 2.5, M23.6 * 2.5 scopes, the specification requirement of the equal strength anchor rod of can realizing colding pressing.
The processing method of the first-class strong anchor pole of colding pressing of the present invention is to adopt cold rolling technology that the termination of the anchor pole rib that disappears is round as a ball, is processed as and satisfies cylindrical that the rolled thread technology requires, and goes out international thread by the rolling of rolled thread technology again.Processing method of the present invention is shown in the accompanying drawing 2, by driving wheel 4 drivening rods 5, draws, promotes escapement 6 driving gear nipper wheels 7 by pivot angle, moves with cold roll 8 synchronous operations.The body of rod 1 rotates and axially with roll 8 swing reciprocating extrusion, eliminates rib 2 under the extruding in roll 8 circular grooves, form one section cylindrical, go out international thread by the rolling of rolled thread technology again.The present invention not detailed description is known technology.
Claims (6)
1, the cold pressing processing method of first-class strong anchor pole, it has the body of rod (1), the body of rod (1) is gone up processing axial screw type rib (2), it is characterized in that: it is with colding pressing the employing cold-press process of a facility with hot-rolled and cold-rolled anchor bar body mother metal, there is not the vertical muscle termination point of anchor rod rib circle of colding pressing that disappears being about to 70-150 millimeter one-way spiral, be processed as the cylindrical body of rod that satisfies the rolled thread specification requirement, go out international thread by the rolling of rolled thread technology again.
2, the processing method of the first-class strong anchor pole of colding pressing according to claim 1, it is characterized in that: the rib (2) on the body of rod (1) is full spirality heat along the body of rod and pricks one, hot rolling bad mold joint (3) is less than or equal to 2 millimeters, and body of rod diameter is 22 millimeters of Φ 20-Φ, pitch L
2Be the 14-18 millimeter, the high L of rib is the 0.6-1.2 millimeter, rib width L
1It is the 2-2.6 millimeter.
3, the processing method of the first-class strong anchor pole of colding pressing according to claim 1 is characterized in that: the body of rod diameter ratio that the screw type rib is a section is cold-pressed into cylindrical body of rod diameter only big 0.15-0.6 millimeter pressure head surplus or equates.
4, according to the processing method of claim 1 or the 3 described first-class strong anchor poles of colding pressing, it is characterized in that: the rib (2) on the body of rod (1) is full screw type heat along the body of rod and pricks one, and it is 1.5 millimeters that heat is pricked bad mold joint (3), and the body of rod (1) diameter is 21.6 millimeters of Φ, pitch L
2Be 14 millimeters, the high L of rib is 1.1 millimeters, rib width L
1It is 2.2 millimeters.
5, the processing method of the first-class strong anchor pole of colding pressing according to claim 1, it is characterized in that: the rib (2) on the body of rod (1) is full screw type cold breakdown one along bar, with round steel after the cold-drawn, employing rolls out rib to wheel, no bad mold joint, the body of rod (1) diameter is 20.6 millimeters of Φ, the high L0.8 millimeter of rib, rib width L
11.8 millimeter, pitch L
2It is 8 millimeters.
6, the processing method of the first-class strong anchor pole of colding pressing according to claim 1, it is characterized in that: adopt the cold pressure processing technology that the termination of the anchor bar body rib that disappears is pressed circle, be processed as cylindrical, go out international thread by the rolling of rolled thread technology again, the concrete roller that adopts rotates rolling, the extruding termination point of anchor rod, by driving wheel (4) drivening rod (5), draw by pivot angle, promote escapement (6) driving gear nipper wheels (7), move with cold roll (8) synchronous operation, the body of rod (1) rotates and axially swings reciprocating extrusion with roll (8), the following elimination rib (2) of extruding in roll (8) circular groove, form one section cylindrical, go out international thread by the rolling of rolled thread technology again.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01135516 CN1284643C (en) | 2001-06-15 | 2001-10-01 | Cold-pressing technology for making equistrength archor arm and its end |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN01115046 | 2001-06-15 | ||
| CN01115046.7 | 2001-06-15 | ||
| CN 01135516 CN1284643C (en) | 2001-06-15 | 2001-10-01 | Cold-pressing technology for making equistrength archor arm and its end |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1359770A CN1359770A (en) | 2002-07-24 |
| CN1284643C true CN1284643C (en) | 2006-11-15 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 01135516 Expired - Fee Related CN1284643C (en) | 2001-06-15 | 2001-10-01 | Cold-pressing technology for making equistrength archor arm and its end |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1284643C (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP3012039A1 (en) * | 2014-10-23 | 2016-04-27 | HILTI Aktiengesellschaft | Twist drill and method of manufacture |
| CN113000750A (en) * | 2021-02-23 | 2021-06-22 | 内蒙古东蒙工贸有限责任公司 | Anchor rod reducing thread rolling production line |
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2001
- 2001-10-01 CN CN 01135516 patent/CN1284643C/en not_active Expired - Fee Related
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| Publication number | Publication date |
|---|---|
| CN1359770A (en) | 2002-07-24 |
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