CN101387083A - Driving rope terminal making technique - Google Patents

Abstract

The invention provides a process for manufacturing driving rope ends, which aims to improve the tensile elasticity and tensile strength of driving rope sets. The process comprises the following steps of: a. manufacturing a rope socket; b. feeding a steel wire rope; c. loading a steel wire rope end into the rope socket and then into a extrusion mold; and d. extruding by use of a hydraulic press. The process can perform dynamic micro-adjustment to the length of a single driving rope within a dimensional tolerance range till a plurality of driving ropes are exactly identical in length and are simultaneously stressed.

Description

Drive rope terminal making technique

Technical field

The present invention relates to a kind of end manufacture craft, relate to a kind of driving rope terminal making technique that dynamically to adjust on the oil pumper of being used for specifically.

Background technology

In oil field operation; drive rope and belong to one of commonly used and critical component on the oil pumper; being one group with several is used between pumping unit horsehead and crossbeam and carries pulling force; in service through regular meeting because not exclusively the equating of length, when driving horse head and move up and down, successively rupture at the end place because of discontinuity.In traditional driving end head manufacture craft, basic order is: 1. selection is the steel wire rope of band fiber wire rope core, need when 2. end is inserted in rope socket need get at the about 100mm of end place core, 3. be pressed into behind the individual wire stewing hook rope socket, 4. pour into kirsite, 5. make but naturally, 6. root dipping machine oil.There is following some deficiency in above manufacturing process: 1. in simmering the hook operation, hook portion is different in size to be caused because steel wire is simmered, so when being pressed into rope socket inside, cause steel wire rope and rope socket root that loose metaboly is arranged, not exclusively equal during pressurized owing to length of steel wire rope, long steel wire strain is to overstep the extreme limit, short steel wire is just in regime of elastic deformation, make that each steel wire strain is inconsistent, local loose distortion reduces whole steel wire rope elasticity at rope socket root place to have caused steel wire rope; Need when 2. pouring into the kirsite operation kirsite fusing 500-520 ℃ the time, just can pour into when rope socket is heated to 300-400 ℃ kirsite and steel wire are solidified, because rope socket heating and filling kirsite cause the wire quality interior tissue to change, local tensile strength reduces; 3. again because the too high butter consumption of the steel wire rope inside that steel wire rope and rope socket root have one section about 100 mm length that causes of heating-up temperature is dried, and soak the quality that does not reach original oil-containing because of oily difference with machine oil behind the filling kirsite, can not lubricate normally between steel wire and the steel wire and cause dry friction and corrosion phenomena between the steel wire, also reduce the tensile strength of steel wire rope.

Summary of the invention

In order to improve tension elasticity and the tensile strength that drives rope, make several driving ropes in a group simultaneously stressed, the invention provides a kind of driving rope terminal making technique, this technology can make the length of single driving rope carry out dynamically trace adjustment in dimensional tolerance range, and restricting until several drivings, length equate fully and the while is stressed.

Technical scheme of the present invention is: this driving rope terminal making technique comprises the following steps:

A. at first select for use TENSILE STRENGTH at the following normal carbon rod iron of 350,000 newton section bar material, then selected material is forged, make the hardness of its crystal grain thinning, even interior tissue, reduction steel, improve steel plasticity so that during cold extrusion metal good flowability is arranged, process rope socket endoporus, cylindrical and length at last;

B. select for use the steel wire rope of 6 strands of 37 wire wire rope cores to carry out blanking by dimensional requirement;

C. the intact wire rope end of above-mentioned b step blanking is penetrated the extrusion die of packing into behind the rope socket that a step made, wherein the squeeze film tool is selected carbon constructional quality steel 45 for use ^#Make extrusion die template and die sleeve material, select for use Cr12MoV to make the cold-extruded pressure head, extrusion head hardness is HRC58-62;

D. extruding: pack the above-mentioned c step into push grinding tool end in extrusion equipment is 450 tons hydraulic press, the setting extruding force is 400 tons pushes, and cuts away the unnecessary cable wire end that extrude the rope socket end afterwards.

The invention has the beneficial effects as follows: in this technology, but at first the selection of steel wire rope and rope socket guarantee to use the cold-stamped mode to make wire rope end it makes to meet the requirements of and closes intensity admittedly; Rope socket adopts the forging mode, makes the inner grain refinement of material structure, even tissue, reduces the hardness of steel, and metal had good flowability when the plasticity of raising steel was beneficial to cold extrusion; Rope adopts the cold-stamped mode to close admittedly with rope socket, has avoided steel wire rope and rope socket to add thermosetting and has closed the intensity decreases that cause because of annealing the back; Because of adopting cold extrusion, steel wire rope does not need oil removing in addition, and the inner condition of profit is not certainly destroyed, and can not produce corrosion, has guaranteed the self-lubricity energy of steel wire rope.

Description of drawings

Accompanying drawing 1 is for driving rope end structural representation.

1-rope socket 2-steel wire rope

The invention will be further described below in conjunction with accompanying drawing:

Shown in accompanying drawing 1, steel wire rope 2 two ends are rope socket 1 among the figure, and its making step is as follows:

A. rope socket 1 is made: at first select for use TENSILE STRENGTH at the following normal carbon rod iron of 350,000 newton section bar material, then selected material is forged, purpose is in order to make inner grain refinement, even tissue, reduce the hardness of steel, improve the plasticity of steel so that metal has good flowability during cold extrusion, at last dimensioned endoporus, cylindrical and length by drawing;

B. steel wire rope 2 blankings: require to select for use the steel wire rope 2 of 6 strands of 37 wire wire rope cores, and tolerance+2mm size blanking by drawing; Because the steel wire rope of traditional fiber wire rope core is fiber wire rope core meeting filler wires and gaps between steel wires under pressure, make steel wire rope produce certain elasticity, therefore reducing consolidating of rope socket and steel wire rope closes intensity, so select the steel wire rope 2 of 6 strands of 37 wire wire rope cores for use, make it keep the better elastic distortion;

C. steel wire rope 2 ends penetrate the extrusion die of packing into behind the rope socket 1: the template of extrusion die and die sleeve material are carbon constructional quality steel 45 ^#, select for use Cr12MoV to make the cold-extruded pressure head, extrusion head hardness is HRC58-62;

D. extruding: the film tool of the end of will packing into places extrusion equipment, extrusion equipment is 450 t hydraulic press, extruding force is 400 tons, and this pressure can make rope socket 1 internal material begin to flow under the effect of pressure when the cold-extruded mould is exerted pressure, and also close admittedly in the slit that is full of steel wire rope 2;

E. shaping: cut away unnecessary steel wire rope 2 fag ends of extruding rope socket 1 end, under the effect of pressure, 2 on steel wire rope in the rope socket 1 has to be extruded, and needs after the extruding to prune;

Driving rope end according to this technology making, when maximum tensile load reached 350kN, steel wire rope 2 pulled gradually with rope socket 1 beginning, pulls size within the 0-4 millimeter, draw intensity level constant, can dynamically adjust length dimension voluntarily when guaranteeing in use to carry power.Because of the theoretical tolerance of the length that drives rope be ± 2mm, when certain root drive rope because of scale error greater than other several scale errors, when carrying pulling force and at first reaching capacity, can singlely dynamically adjust length dimension voluntarily, stressed jointly until four length unanimities.

Claims (1)

1, a kind of driving rope terminal making technique comprises the following steps:

A. at first select for use TENSILE STRENGTH at the following normal carbon rod iron of 350,000 newton section bar material, then selected material is forged, make the hardness of its crystal grain thinning, even interior tissue, reduction steel, improve steel plasticity so that during cold extrusion metal good flowability is arranged, process rope socket endoporus, cylindrical and length at last;

B. select for use the steel wire rope of 6 strands of 37 wire wire rope cores to carry out blanking;

C. the intact wire rope end of above-mentioned b step blanking is penetrated the extrusion die of packing into behind the rope socket that a step made, wherein the squeeze film tool is selected carbon constructional quality steel 45 for use ^#Make extrusion die template and die sleeve material, select for use Cr12MoV to make the cold-extruded pressure head, extrusion head hardness is HRC58-62;

D. extruding: pack the above-mentioned c step into push grinding tool end in extrusion equipment is 450 tons hydraulic press, the setting extruding force is 400 tons pushes, and cuts away the unnecessary cable wire end that extrude the rope socket end afterwards.

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