WO2013112516A1 - Method and apparatus for continuous bulbing of stranded cable - Google Patents
Method and apparatus for continuous bulbing of stranded cable Download PDFInfo
- Publication number
- WO2013112516A1 WO2013112516A1 PCT/US2013/022646 US2013022646W WO2013112516A1 WO 2013112516 A1 WO2013112516 A1 WO 2013112516A1 US 2013022646 W US2013022646 W US 2013022646W WO 2013112516 A1 WO2013112516 A1 WO 2013112516A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- cable
- bulb
- length
- forming
- clamp
- Prior art date
Links
Classifications
-
- D—TEXTILES; PAPER
- D07—ROPES; CABLES OTHER THAN ELECTRIC
- D07B—ROPES OR CABLES IN GENERAL
- D07B7/00—Details of, or auxiliary devices incorporated in, rope- or cable-making machines; Auxiliary apparatus associated with such machines
- D07B7/16—Auxiliary apparatus
- D07B7/18—Auxiliary apparatus for spreading or untwisting ropes or cables into constituent parts for treatment or splicing purposes
- D07B7/187—Auxiliary apparatus for spreading or untwisting ropes or cables into constituent parts for treatment or splicing purposes for forming bulbs in ropes or cables
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21F—WORKING OR PROCESSING OF METAL WIRE
- B21F45/00—Wire-working in the manufacture of other particular articles
- B21F45/06—Wire-working in the manufacture of other particular articles of flexible shafts or hollow conduits, e.g. for Bowden mechanisms
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D21/00—Anchoring-bolts for roof, floor in galleries or longwall working, or shaft-lining protection
- E21D21/0026—Anchoring-bolts for roof, floor in galleries or longwall working, or shaft-lining protection characterised by constructional features of the bolts
- E21D21/006—Anchoring-bolts made of cables or wires
Definitions
- the present invention relates to cable bolts, in particular, to a method and apparatus for forming a bulb in a stranded cable bolt.
- Cable bolts are used in the mining industry for their ease of handling and installation. Cable bolts are generally easier to fit into a borehole than the elongated rods of conventional rod bolt systems. Regardless of the height limitations in a mine, cable bolts may be adapted to boreholes of any length due to their flexibility. The strength capacity of cables exceeds that of conventional rod bolts and, therefore, cable is the preferred reinforcement for certain roof conditions.
- Cable bolts are typically installed by placing a resin cartridge including catalyst and adhesive material into the blind end of a borehole, inserting the cable bolt into the borehole so that the upper end of the cable bolt rips open the resin cartridge and the resin flows in the annulus between the borehole and the cable bolt, rotating the cable bolt to mix the resin catalyst and adhesive, and allowing the resin to set about the cable bolt.
- the resin is typically set at an upper portion of the cable bolt at the blind end of the borehole.
- the cable bolts are typically formed with one or more bulbs to increase the bonding between the bolts and the resin.
- a method of forming a bulb in a cable bolt includes providing cable from a cable source, advancing the cable in a first direction, and forming a bulb in a portion of the cable while the portion of the cable is continuously advanced and while the cable is continuously provided from the cable source.
- the bulb may be formed by moving a bulb forming mechanism along with the cable.
- the method may further include cutting the cable to a preset length while the cable is continuously advanced by moving a cutting device along with the cable.
- the cutting device may have a first position and a second position spaced from the first position, with the cutting device moving between the first and second positions while cutting the cable to the preset length.
- the cable source may include a spool having a length of cable, and the cable may be provided from an inner portion of the spool.
- the bulb forming mechanism may be movable between a first position and a second position spaced from the first position, with the bulb forming mechanism moving from the first position to the second position while forming the bulb.
- the method may further include spooling the cable after being cut to a preset length onto a spooler.
- the bulb forming mechanism may move from the second position to the first position after forming the bulb.
- the method may further include forming a plurality of bulbs in spaced apart portions of the cable.
- the bulb forming mechanism may include first and second clamps, with the first clamp engaging the cable as the bulb forming mechanism moves along with the cable and the second clamp moving relative to the first clamp to form the bulb.
- the cable may be advanced via a drive mechanism. An entire portion of the cable extending from the cable source may be continuously advanced until the cable is cut to the preset length.
- an apparatus for forming a bulb in a cable bolt includes a drive mechanism configured to continuously advance a length of cable, and a bulb forming mechanism movable along a longitudinal axis defined by the length of the cable between a first position and a second position spaced from the first position.
- the bulb fomiing apparatus is configured to form a bulb on a cable while moving along with the advancing cable.
- the apparatus may further include a cable source configured to provide a length of cable.
- the length of cable extends to the drive mechanism and from the drive mechanism to the bulb forming mechanism.
- the apparatus may further include a cutting device configured to cut a length of cable to a preset length.
- the cutting device may be movable between a first position and a second position spaced from the first position.
- the bulb fomiing mechanism may include first and second clamps, with the first clamp configured to engage a cable as the bulb forming mechanism moves along with the cable and with the second clamp being movable relative to the first clamp to form a bulb on the cable.
- the bulb forming mechanism may include a motor to move the bulb fomiing mechanism between the first and second positions.
- FIG. 1 is a schematic view of an apparatus for forming a bulb in a cable bolt according to one embodiment of the present invention, showing a first position of a bulb forming mechanism and cutting mechanism.
- Fig. 2A is a schematic view of a spool of cable according to another embodiment of the present invention.
- FIG. 2B is a schematic view of a spool mechanism according to a further embodiment of the present invention.
- Fig. 3 is a schematic view of the apparatus shown in Fig. 1, showing a second position of the bulb forming mechanism and cutting mechanism.
- Fig. 4 is a plan view of a bulb forming mechanism according to one embodiment of the present invention, showing a cable bolt prior to bulbing.
- Fig. 5 is a plan view of the bulb fomiing mechanism of Fig. 4, showing the cable bolt after a bulb has been formed.
- an apparatus 10 for forming a bulb in a cable bolt includes a spool 12 having a length of stranded cable 14 wound around to the spool 12 and configured to pay off cable from the spool 12 as indicated by direction A by rotating the spool 12.
- the cable 14 is shown being advanced from an outer portion of the spool 12, the cable 14 may also be spooled such that the cable 14 is advanced from a center or eye of a coil of cable as shown in Fig. 2 A.
- a drive mechanism 16 receives the cable 14 and is configured to advance the cable 14 in a direction corresponding to a longitudinal axis of the cable 14.
- the drive mechanism 16 includes a measuring device (not shown), such as a set of measuring wheels, which allows the formation of bulbs at preset and varying intervals along the length of the cable 14.
- the measuring device may include an encoder wheel driven by the moving cable that includes an optical sensor that provides pulses of light with each revolution of the encoder wheel.
- the length of cable 14 advanced is determined by the quantity of revolutions experienced by the encoder wheel.
- a programmable logic controller (PLC) (not shown) detects when a certain length of cable 14 has been advanced and controls the apparatus to form bulbs 20 at preset and varying intervals along the length of the cable 14.
- PLC programmable logic controller
- a bulb forming mechanism 18 receives the cable 14 from the drive mechanism 16 and forms one or more bulbs 20 along the length of the cable 14 as controlled by the PLC or other suitable arrangement.
- the bulb forming mechanism 18 is mounted on a sliding frame shown schematically at 22 such that the bulb forming mechanism 18 is movable as indicated at B along a direction corresponding to the longitudinal axis of the advancing cable 14 to allow the bulb forming mechanism 18 to travel with the cable 14.
- the bulb forming mechanism 18 is configured to form a bulb 20 on the cable 14 while the cable 14 is continuously advanced by moving with the cable 14 while forming the bulb 20.
- the bulb forming mechanism 18 includes a pair of clamps generally indicated at 24 that releasably engage the cable 14. One of the clamps 24 is movable relative to the other clamp to buckle the strands of the cable 14 thereby forming the bulb 20 in the cable 14.
- the bulb fomring mechanism 18 will clamp onto the cable 14 and travel along with the cable 14 while forming a bulb 20 at a specified location as determined by the measuring device and PLC.
- the cable 14 will be released by the bulb fomring mechanism 18 and the bulb forming mechanism 18 will move to its original position.
- the bulb forming mechanism 18 has a first position (shown in Fig. 1) at the start of the bulb forming sequence and a second position (shown in Fig. 3) spaced from the first position at the end of the bulb forming sequence.
- the bulb fomring mechanism 18 will return to the first position after forming a bulb 20.
- the spool 12 and drive mechanism 16 can be continuously operated such that the cable 14 is continuously advanced without stopping any portion of the cable 14 to form the bulbs 20. Such a continuous operation improves efficiency of the bulb forming operation by not having to start and stop the drive motors (not shown) powering the spool 12 and drive mechanism 16 and by not having stoppage time while the bulbs 20 are being formed.
- the cable 14 will continue passing tlirough a cutting device 26, such as a cut off saw, although other suitable cutting devices may be utilized.
- the cutting device 26 is mounted on a sliding table arrangement 28 in a similar manner as described above in connection with the bulb forming mechanism 18 such that the cutting device 26 is movable as indicated at C along a direction corresponding to the longitudinal axis of the advancing cable 14.
- the cutting device 26 is configured to automatically cut the bulbed cable 14 to preset lengths, which are then bundled and packaged as shown at 30.
- the cable 14 may also be passed through the cutting device 26 to a rewind spooler 32 to allow for spooling of longer bulbed cable bolts as indicated by direction D of the spooler 32.
- the cutting device 26 has a first position (shown in Fig. 1) at the start of the cutting process and a second position (shown in Fig. 3) spaced from the first position at the end of the cutting process. The cutting device 26 will return to the first position after performing the cutting process. The movement of the cutting device 26 allows the cable 14 to be continuously advanced thereby allowing the cable 14 to have a positive velocity throughout the process.
- the bulb forming mechanism 18 is supported by a frame 40 having a pair of parallel racks 42.
- the bulb forming mechanism 18 includes a first clamp set 44 fixedly mounted to a base 46 and a second clamp set 48 movably mounted to the base 46.
- the second clamp set 48 is supported by a sliding bush and shaft arrangement 50, 52.
- Each clamp set 44, 48 includes a pair of hydraulically operated mutually opposed jaws 54, 56 which are releasably engagable with the cable 14.
- other suitable clamping arrangements may be utilized to grip the cable 14.
- Double acting hydraulic cylinders 58, 60 are used to activate the first and second clamp sets 44, 48 to clamp the cable 14 therebetween.
- the double acting hydraulic cylinders 58, 60 may be substituted by single acting cylinders which activate the first and second clamp sets 44, 48 to clamp the cable 14 therebetween.
- the bulb forming mechanism 18 includes an actuator 62 in the form of a hydraulic piston with one end fixedly mounted to the base 46 and the other end movably mounted to the second clamp set 48.
- the piston 62 provides movement of the second clamp set 48 towards the first clamp set 44 during the bulbing process.
- the single actuator 62 may be substituted by two actuators located on either side of the cable 14 with each actuator having one end fixedly mounted to the base 46 and the other end movably mounted to the second clamp set 48.
- Other power sources, such as electricity, may be utilized to power the actuators.
- the bulb forming mechanism 18 includes a set of driven front pinions 64 and a complementary pair of rear idler pinions 66 in gearing engagement with the parallel racks 42 for enabling the clamp sets 44, 48 to move along with the cable 14 during the bulb forming process as described above.
- the front pinions 64 are preferably driven by a reversible, variable speed, hydraulic motor 68 with a built-in brake. A reversible, variable speed, electric motor with a brake could also be used for this purpose.
- the bulb forming mechanism 18 is movably mounted to the frame 40, the bulb foraiing mechanism 18 may also be movably mounted to a ceiling rail, or other suitable arrangement, which runs parallel to the cable 14.
- the bulb forming mechanism 18 includes one or more proximity sensors (not shown) for measuring the radial displacement of the bulb formed in the cable.
- the bulb foraiing mechanism 18 also includes an encoder 70 for controlling the movement of the pinions 64, 66 along the racks 42.
- the cable 14 is advanced across the length of the frame 40 with a portion of the cable 14 extending through the jaws 54, 56 of the first and second clamp sets 44, 48. Oil pressure is then applied to the double acting hydraulic cylinders 58, 60 to respectively clamp the cable 14 between the jaws 54, 56 of the first and second clamp sets 44, 48, as shown in Fig. 4. The hydraulic piston 62 is then activated to move the second clamp set 48 towards the first clamp set 44 forming a bulb 20 in the cable 14, as shown in Fig. 5.
- the hydraulic motor 68 drives the pinions 64 to move the bulb forming mechanism 18 along with the cable 14 in a direction corresponding to the longitudinal axis of the cable 14.
- Radial displacement of the cable 14 may be controlled by the PLC using one or more proximity sensors (not shown) to limit the radial displacement of the bulb 20.
- Oil pressure is then applied to the topside of the hydraulic piston 62 which in turn moves the second clamp set 48 back to its starting position, as shown in Fig. 4.
- the bulb foraiing mechanism 18 is in the second position as shown in Fig. 3 and described above.
- the motor 68 then drives the pinions 64 along the racks 42 to move the bulb foraiing mechanism 18 to the first position, as shown in Fig. 1 and described above, for performing further bulb forming processes.
- the bulb foraiing mechanism 18 may be moved as necessary to form one or more bulbs 20 on the cable 14 at predetermined positions while the cable 14 is continuously advanced.
- the bulb forming mechanism 18 described above and shown in the figures may take other forms as long as the mechanism for forming the bulbs is movable to allow the portion of the cable where the bulb is formed to be continuously advanced.
- the bulb forming mechanism 18 may be embodied as the bulb forming mechanism shown and described in U.S. Patent Application Publication No. 2011/0259072 to Evans et al. and U.S. Patent Nos. 5,344,256 to Hedrick and 6,820,657 to Hedrick, which are each incorporated by reference in their entirety.
Abstract
Description
Claims
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CA2862310A CA2862310A1 (en) | 2012-01-24 | 2013-01-23 | Method and apparatus for continuous bulbing of stranded cable |
EP13740911.6A EP2807303A4 (en) | 2012-01-24 | 2013-01-23 | Method and apparatus for continuous bulbing of stranded cable |
AU2013202779A AU2013202779B2 (en) | 2012-01-24 | 2013-01-23 | Method and apparatus for continuous bulbing of stranded cable |
CN201380006575.8A CN104220668A (en) | 2012-01-24 | 2013-01-23 | Method and apparatus for continuous bulbing of stranded cable |
ZA2014/04312A ZA201404312B (en) | 2012-01-24 | 2014-06-11 | Method and apparatus for continuous bulbing of stranded cable |
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US201261590010P | 2012-01-24 | 2012-01-24 | |
US61/590,010 | 2012-01-24 | ||
US13/746,432 US20140033782A1 (en) | 2012-01-24 | 2013-01-22 | Method and Apparatus for Continuous Bulbing of Stranded Cable |
US13/746,432 | 2013-01-22 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2013112516A1 true WO2013112516A1 (en) | 2013-08-01 |
Family
ID=48873845
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/US2013/022646 WO2013112516A1 (en) | 2012-01-24 | 2013-01-23 | Method and apparatus for continuous bulbing of stranded cable |
Country Status (8)
Country | Link |
---|---|
US (1) | US20140033782A1 (en) |
EP (1) | EP2807303A4 (en) |
CN (1) | CN104220668A (en) |
AU (1) | AU2013202779B2 (en) |
CA (1) | CA2862310A1 (en) |
CL (1) | CL2014001809A1 (en) |
WO (1) | WO2013112516A1 (en) |
ZA (1) | ZA201404312B (en) |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3749140A (en) * | 1970-07-02 | 1973-07-31 | M Debry | Machine for the automatic continuous manufacture of reinforcements |
US20060054748A1 (en) * | 2004-09-13 | 2006-03-16 | Dywidag-Systems International Pty Limited | Apparatus and method for manufacturing a rock bolt |
US20060180230A1 (en) * | 2005-02-17 | 2006-08-17 | Jennmar Corporation | Cable bulbing apparatus and method for forming bulbs in a cable bolt |
US20110259072A1 (en) * | 2008-12-24 | 2011-10-27 | David William Evans | Apparatus and method for manufacturing a cable bolt |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2928120C2 (en) * | 1979-07-12 | 1985-10-10 | Benteler-Werke Ag Werk Neuhaus, 4790 Paderborn | Device for the manufacture of motor vehicle exhaust pipes |
DE4203740C2 (en) * | 1992-02-09 | 1996-07-11 | Dyckerhoff & Widmann Ag | Method for producing an anchor element from a strand made of twisted steel wires |
US5522561A (en) * | 1992-06-03 | 1996-06-04 | The United States Of America As Represented By The Secretary Of The Navy | Fiber optic cable payout system |
AU2008264210B2 (en) * | 2005-02-17 | 2016-05-05 | Fci Holdings Delaware, Inc. | Cable Bulbing Apparatus and Method for Forming Bulbs in a Cable Bolt |
GR1005986B (en) * | 2006-10-03 | 2008-07-10 | Method and system for the production of three-dimensional products. | |
KR101151552B1 (en) * | 2009-11-26 | 2012-05-30 | 이민호 | Apparatus of Forming Bulbed Cable |
-
2013
- 2013-01-22 US US13/746,432 patent/US20140033782A1/en not_active Abandoned
- 2013-01-23 AU AU2013202779A patent/AU2013202779B2/en not_active Ceased
- 2013-01-23 EP EP13740911.6A patent/EP2807303A4/en not_active Withdrawn
- 2013-01-23 CA CA2862310A patent/CA2862310A1/en not_active Abandoned
- 2013-01-23 WO PCT/US2013/022646 patent/WO2013112516A1/en active Application Filing
- 2013-01-23 CN CN201380006575.8A patent/CN104220668A/en active Pending
-
2014
- 2014-06-11 ZA ZA2014/04312A patent/ZA201404312B/en unknown
- 2014-07-08 CL CL2014001809A patent/CL2014001809A1/en unknown
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3749140A (en) * | 1970-07-02 | 1973-07-31 | M Debry | Machine for the automatic continuous manufacture of reinforcements |
US20060054748A1 (en) * | 2004-09-13 | 2006-03-16 | Dywidag-Systems International Pty Limited | Apparatus and method for manufacturing a rock bolt |
US20060180230A1 (en) * | 2005-02-17 | 2006-08-17 | Jennmar Corporation | Cable bulbing apparatus and method for forming bulbs in a cable bolt |
US20110259072A1 (en) * | 2008-12-24 | 2011-10-27 | David William Evans | Apparatus and method for manufacturing a cable bolt |
Non-Patent Citations (1)
Title |
---|
See also references of EP2807303A4 * |
Also Published As
Publication number | Publication date |
---|---|
US20140033782A1 (en) | 2014-02-06 |
CA2862310A1 (en) | 2013-08-01 |
CN104220668A (en) | 2014-12-17 |
AU2013202779B2 (en) | 2016-01-21 |
EP2807303A4 (en) | 2016-02-17 |
CL2014001809A1 (en) | 2014-09-26 |
ZA201404312B (en) | 2015-08-26 |
EP2807303A1 (en) | 2014-12-03 |
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