CN102979538A - Production method of plunger in individual hydraulic prop or piston rod of fully mechanized mining support upright column - Google Patents
Production method of plunger in individual hydraulic prop or piston rod of fully mechanized mining support upright column Download PDFInfo
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- CN102979538A CN102979538A CN2012105205437A CN201210520543A CN102979538A CN 102979538 A CN102979538 A CN 102979538A CN 2012105205437 A CN2012105205437 A CN 2012105205437A CN 201210520543 A CN201210520543 A CN 201210520543A CN 102979538 A CN102979538 A CN 102979538A
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Abstract
The invention belongs to the field of production of an individual hydraulic prop in mining support equipment and a fully mechanized mining support in the hydraulic support equipment, and particularly relates to a production method of a plunger in the individual hydraulic prop or a piston rod of a fully mechanized mining support upright column. The production method is characterized by comprising the following steps of: selecting a seamless steel pipe as a plunger or piston rod basal body, wherein thermoplastic polyurethane elastomer is used as a composite layer material; performing blanking, machining, shot blasting, spiral groove machining or drying after glue spreading on the seamless steel pipe in sequence to form A for later use; drying thermoplastic polyurethane elastomer particles to form B for later use; injection-molding the B on the surface of the A to form a composite layer in an injection molding mode; and performing shot blasting to obtain the plunger or piston rod finished product. The individual hydraulic prop or the fully mechanized mining support upright column is corrosion-resistant, blast-proof, long in corresponding service time and low in maintenance cost, and the production method has the characteristics of simplicity and low production cost.
Description
Technical field
The invention belongs to hydraulic prop in the mining supports equipment and the fully mechanized mining supporter field in the hydraulic prop equipment, relate in particular to live in a kind of hydraulic prop post or fully mechanized mining supporter column piston rod production method.
Background technology
China is that face is maximum in the world, uses the maximum country of roof timbering number of devices.Because the ore bed occurrence condition of China is complicated especially, roof timbering equipment is limited by very large.Thereby from work plane quantity, 10% work plane can adopt to combine adopts support apparatus, rare roof accident, and 90% work plane uses the monomer support apparatus, and roof accident usually occurs.From miner's number of stope working, combine miner's number of adopting the working of support apparatus work plane and only account for 10%, and miner's number of monomer support apparatus work plane working occupies 90%.From security situation, 10% working miner number is safety or safer, and the miner of 90% working is unsafe or is at any time unsafe condition.The casualty accident that occurs from national ore deposit, the number of casualties that occurs because of top board accounts for 40～45% of all number of casualties.Thereby roof accident is the China's coal-mine the highest casualty accident of frequency that has an accident.
The monomer support apparatus that China uses at present is wooden prop, metal friction pillar, three kinds of monomer support apparatus of piston hydraulic pillar.According to incomplete statistics, all types of monomer support materials that China is required or equipment are very huge markets greatly about 400～5,000,000.But with regard to existing three kinds of monomer support materials or equipment, exist very large even very serious potential safety hazard.
Wooden prop is as a kind of ancient and simple and crude support material, and it does not have setting load, does not also have constant-resistance to fall the characteristic of post, and the safety of support can't guarantee, thereby exist the potential safety hazard that the roof fall casualty accident may occur.And because its consumption amount of wood is quite large, can causes the excessive and random lumbering of the various places woods, thereby form serious disruption of ecological balance.
The metal friction pillar is a kind of simple monomer support apparatus that grows up in the sixties, compares with wooden prop and can save a large amount of timber, and reusable.But it can not guarantee that post falls in constant-resistance, and support force is subjected to uncontrollable factor affecting such as temperature, humidity and operator a lot, and top board has the possibility that the roof fall casualty accident occurs at any time.
The piston hydraulic pillar such as the DW type, is a kind of monomer support apparatus that grew up in 80 years, compares with front two kinds of individual props to guarantee that post falls in constant-resistance, and support force also can be controlled, but this pillar also exists serious potential safety hazard.Such as: because know-why and the design feature of piston hydraulic pillar, caused that the outer lip of y-shaped ring and the inner wall surface of oil cylinder are high pressure sealing face on the piston, when roof pressure strengthens, the oil cylinder inner wall surface diameter will increase, thereby cause and usually produce internal leakage between piston and the oil cylinder, cause the void of pillar to push up, take off top even the inferior phenomenon of pillar automatic pouring, it is very frequent also very extensive that internal leakage occurs, and be anywhere or anytime.Owing to be internal leakage, the miner with the naked eye can't find, thereby internal leakage is a kind of uncontrollable potential safety hazard, thereby caused more roof fall casualty accident.
For the present situation of China's monomer support apparatus and the problems such as potential safety hazard of existence, DWX type suspension type hydraulic prop series of products occur.The slipper seal point of DWX type hydraulic prop has adopted sealing compensation and seal-swelling know-why.Be sealed with in the situation of wearing and tearing, but effective compensation.In pillar high pressure support situation, can keep the seal-swelling state, greatly improved sealing and the security performance of slipper seal point, reduced the turnover rate of sealing, reduced maintenance and maintenance cost.
But no matter be DW type or DWX type, hydraulic prop often all is faced with underground hydraulic pressure pillar etching problem because equipment dismounting difficulty comparatively, the problems referred to above appear and after conventional method be difficult to Solve on site more, more renewing spare part as main, but the replacement cycle is long and expense is higher.
Underground hydraulic pressure pillar or fully mechanized mining supporter corrosion mainly because of the coal sulfur-bearing, make subsurface environment be acid, and equipment is existed serious corrosion.Corrosion is divided into homogeneous corrosion and spot corrosion, homogeneous corrosion refers to that body surface does not pass through specially treated, the corrosion that whole product surface occurs, spot corrosion refers to through the thing of anti-corrosion treatment because local anti-corrosion layer failure corrodes in the speed that the position of destroying occurs, soon for the DW type, pillar mainly adopts oil cylinder inner surface to seal as sealing surface, for anticorrosion, just copper facing inside of conventional method, general oil cylinder is to process again copper facing.If sealing surface destroys, be sealed to problem.Therefore the DW pillar exists processing difficulties, and copper facing difficulty, copper facing quality be difficult the assurance also.For the DWX type, be to use the external surface of the post of living as sealing surface, conventional method is at the external surface chemical plating nickel-phosphorus alloy of post of living, coating is processed handling ease in oil cylinder outside.But no matter be copper facing or alloy plating, coating is all thinner, generally is 30um.Because no matter the generation of spot corrosion is the live chemical deposit of post or the copper plate of oil cylinder, as long as very serious corrosion phenomenon will soon occur in the appearance point corrosion, causes the destruction of sealing surface.Particularly for the DWX type, after the post emersion of living comes, in the environment that is exposed, just have cinder when blowing out and collapse in the above, big gun occurs collapse phenomenon, destroy sealing surface.
Therefore, withstand corrosion, the hydraulic prop of blast-proof or fully mechanized mining supporter column are required at present.
Summary of the invention
For solving above technical problem, the invention provides the production method of live in a kind of hydraulic prop post or fully mechanized mining supporter column piston rod, make in use corrosion-resistant, blast-proof not only of hydraulic prop or fully mechanized mining supporter, and service time is long, maintenance cost is low, also has the advantage that method is simple, cost of production is low.
Live in a kind of hydraulic prop of technical solution problem among the present invention production method of post or fully mechanized mining supporter column piston rod is characterized in that: may further comprise the steps:
Step (1): select raw material: take seamless steel pipe as live post or piston rod matrix, TPUE as composite material;
Step (2): seamless steel pipe passes through blanking, machining, ball blast, processing spiral groove or gluing post-drying successively, bake out temperature 110-130 ℃, drying time 1-2 hour;
Step (3): TPUE is through super-dry, bake out temperature 80-120 ℃, drying time 2-4 hour;
Step (4): make the seamless steel pipe surface that dried TPUE is injection-moulded in after drying in the step (2) in the step (3) form one deck composite bed by injection mo(u)lding, polishing namely gets post alive or piston rod finished product.
Wherein, described seamless steel pipe is the 27SiMn seamless steel pipe; TPUE is polyesters, polyethers, i.e. thermoplasticity flexible polyester polyurethane body, thermoplastic polyether polyurethane elastomer.
In the described thermoplastic polyester polyurethane elastomer injection moulding mode, injection pressure: 65kg, flow velocity 25%, temperature 205-220 ℃; In the described thermoplastic polyether polyurethane elastomer injection moulding mode, injection pressure 65kg, flow velocity 25%, temperature 200-215 ℃.
Glue is the special-purpose one-component solvent-based adhesive of TPU in the described gluing process.
Described TPUE needs through removal moisture drying, water content＜300ppm (mg/kg).
Among the present invention, blanking namely cuts seamless steel pipe with sawing machine by the dimensional requirement saw; Machining is with car, mills, digs, grinds seamless steel pipe is processed into certain size, the component of certain roughness; In addition, ball blast is lip-deep with shot-blasting machine cleaning seamless steel pipe as rust waits dirt, makes it expose metallic luster; The processing spiral groove namely processes spiral helicine groove with lathe at the seamless steel pipe external surface; Polishing is exactly by polissoir it to be polished after injection moulding is finished, and improves the fineness on surface; The normal operation screw-type injection machine is finished in the injection molding process, also available extrusion molding mode.
TPUE among the present invention (Thermoplastic polyurethane), hereinafter to be referred as TPU, it is the family macromolecule material between rubber and plastics, but heating plasticizing, do not have on the chemical constitution or seldom crosslinked, its molecule is linear substantially, yet but has certain physical crosslinking.
TPUE be the key property of TPU have hardness range wide, good elasticity, resistance to deformation, the ability of indentation and scuffing and abrasion resistance arranged; Supporting capacity, impact resistance and damping performance are outstanding.The glass transition temperature of TPU is lower, still keeps good elasticity, compliance and other physical properties at subzero 35 degree.And oil resistant, water-fast, anti-mould, regeneration is good.
Although TPU has the plurality of advantages that is suitable as mine individual hydraulic prop or the use of fully mechanized mining supporter column sealing surface, but very formidable technical problem is arranged in actual use, adhesion such as this kind material and metal material is bad, and relatively poor adhesive ability composite bed can occur easily and break away from from matrix material etc.Make a concrete analysis of as follows:
The one, inclusion power, TPU itself has good performance, but and the inclusion power of iron and steel bad; The 2nd, the processability aspect, processing temperature is narrow, and the too high material of temperature decomposes flavescence; The 3rd, moisture control, oven dry is incomplete, and ambient influnence all can make the material suction, can make product surface bubble occur when injection moulding; The 4th, annotate discontented.
At first for inclusion power: steel surface and TPU appearance in conjunction with problem, expected before this that recessing and annular knurl solved, but DeGrain, consider that again TPU is molten condition bag pillar, one of a heat is cold, and heat is met suddenly cold, must condense, so expect heating to pillar.The pillar that process is heated and the inclusion power of TPU strengthen; And can also solve this problem by adding adhesive.
The 2nd, the processing of processability: TPU is mainly regulated by moisture control and processing temperature, and the processing conditions of TPU is narrow with respect to other macromolecular materials, is mainly reflected on moisture control and the processing temperature.The TPU processing temperature can be regulated, and is more low better.Processing temperature is too high, can cause too for a long time the material carbonization to decompose because putting inside screw rod in the raw material injection moulding process again, and physical property descends, and therefore will pay special attention to the control of processing technology.
The 3rd, moisture content: moisture control is TPU processing topmost requirement in early stage, and water content is less than 300ppm (mg/kg) among the TPU.TPU itself has very strong water imbibition, and its water absorbing properties is not second to desiccant.The TPU particle that drying is crossed is exposed in the air 15 minutes, must again dry and could process.Bubble and rough can appear in the too high process of moisture content.In the reinforced later stage, because having certain hour or air humidity large, sample can absorb water after adding material bin through oven dry, causes the surface bubble to occur.Increasing the dehumidifying step makes the later stage sample reduce in the hopper suction.
At post or piston rod surface processing spiral groove or the gluing of living, the former can make injection molded layers be deep into the groove the inside, prevents that composite bed from coming off; The latter increases the transition zone between a metal material and the TPU, strengthens adhesion.
Live post or piston rod in process of production, and large-sized post alive and TPU material injection mo(u)lding difficulty are large, and the compound TPU material of large-size workpiece has certain difficulty, solve by removal moisture drying and workpiece preheating to material among the present invention.
The injection molded layers on live post or piston rod among the present invention has good elasticity on the basis that guarantees certain degree of hardness; Corrosion-resistant, wear-resisting, the blast-proof of post of living is a kind of environmentally friendly machine of desirable coal-face supporting.
Post alive among the present invention or Repair of Piston Rods are convenient, and the injection molded layers of 1.5-3 millimeter is fallen with the lathe car, get final product at the injection moulding last layer.If in the down-hole, if composite bed destruction is not serious, clear up the sealing surface that destroys, coat adhesive specially, after the adhesive, file is frustrated, and sand papering is smooth, gets final product.
Production method of the present invention is simple, and coating layer thickness is unrestricted again.In addition, injection molded layers has excellent adhesive power for hydraulic prop or fully mechanized mining supporter column piston, has the performance of oil resistant, water-fast, corrosion-resistant, blast-proof, the characteristics of favorable elasticity under higher hardness, and be easy to repair.Product among the present invention not only can satisfy the production and application requirement under the above-mentioned operating mode, and simultaneously, the sealing performance after having guaranteed to repair has guaranteed the normal production of coal mining enterprise, avoids the waste of equipment.
Description of drawings
Fig. 1 is the method flow diagram among the present invention
The specific embodiment
Embodiment 1
Take the 27SiMn seamless steel pipe as live post or piston rod matrix, thermoplastic polyester polyurethane elastomer as composite bed; Seamless steel pipe passes through blanking, machining, ball blast, processing spiral groove or gluing post-drying successively, and 120 ℃ of bake out temperatures, drying time 1.5 hours become A for subsequent use, and glue is the special one-component solvent-based adhesive of TPU in the gluing process; TPUE becomes B for subsequent use after super-dry, and 95 ℃ of bake out temperatures, drying time 3 hours, TPUE be through removal moisture drying, water content 290ppm (mg/kg); After the surface that B is injection-moulded in A by injection molding formed one deck composite bed, polishing namely got post alive or piston rod finished product.
Wherein, 215 ℃ of injection pressure: 65kg, flow velocity 25%, temperature.
Blanking namely cuts seamless steel pipe with sawing machine by the dimensional requirement saw; Machining is with car, mills, digs, grinds seamless steel pipe is processed into certain size, the component of certain roughness; In addition, ball blast is lip-deep with shot-blasting machine cleaning seamless steel pipe as rust waits dirt, makes it expose metallic luster; The processing spiral groove namely processes spiral helicine groove with lathe at the seamless steel pipe external surface; Polishing is exactly by polissoir it to be polished after injection moulding is finished, and improves the fineness on surface; The normal operation screw-type injection machine is finished in the injection molding process, also available extrusion molding mode.
Material therefor can be bought in market.
Embodiment 2
Take the 27SiMn seamless steel pipe as live post or piston rod matrix, thermoplastic polyether polyurethane elastomer as composite material; Seamless steel pipe passes through blanking, machining, ball blast, processing spiral groove or gluing post-drying successively, and 120 ℃ of bake out temperatures, drying time 1.5 hours become A for subsequent use, and glue is the special-purpose one-component solvent-based adhesive of TPU in the gluing process; TPUE becomes B for subsequent use after super-dry, and 95 ℃ of bake out temperatures, drying time 3 hours, TPUE be through removal moisture drying, water content 290ppm (mg/kg); After the surface that B is injection-moulded in A by injection molding formed one deck composite bed, polishing namely got post alive or piston rod finished product.
Wherein, injection pressure 65kg, flow velocity 25%, temperature are 210 ℃.
The operation of the steps such as blanking, machining, ball blast is with embodiment 1.
Embodiment 3
Take the 27SiMn seamless steel pipe as live post or piston rod matrix, thermoplastic polyether polyurethane elastomer as composite material; Seamless steel pipe passes through blanking, machining, ball blast, processing spiral groove or gluing post-drying successively, and 130 ℃ of bake out temperatures, drying time 1 hour become A for subsequent use, and glue is the special-purpose one-component solvent-based adhesive of TPU in the gluing process; TPUE becomes B for subsequent use after super-dry, and 80 ℃ of bake out temperatures, drying time 4 hours, TPUE be through removal moisture drying, water content 280ppm (mg/kg); After the surface that B is injection-moulded in A by injection molding formed one deck composite bed, polishing namely got post alive or piston rod finished product.
Wherein, injection pressure 65kg, flow velocity 25%, temperature are 215 ℃.
The operation of the steps such as blanking, machining, ball blast is with embodiment 1.
Embodiment 4
Take the 27SiMn seamless steel pipe as live post or piston rod matrix, thermoplastic polyester polyurethane elastomer as composite material; Seamless steel pipe passes through blanking, machining, ball blast, processing spiral groove or gluing post-drying successively, and 110 ℃ of bake out temperatures, drying time 2 hours become A for subsequent use, and glue is the special-purpose one-component solvent-based adhesive of TPU in the gluing process; TPUE becomes B for subsequent use after super-dry, and 120 ℃ of bake out temperatures, drying time 2 hours, TPUE be through removal moisture drying, water content 270ppm (mg/kg); After the surface that B is injection-moulded in A by injection molding formed one deck composite bed, polishing namely got post alive or piston rod finished product.
Wherein, injection pressure 65kg, flow velocity 25%, temperature are 220 ℃.
The operation of the steps such as blanking, machining, ball blast is with embodiment 1.
Embodiment 5
Take the 27SiMn seamless steel pipe as live post or piston rod matrix, thermoplastic polyester polyurethane elastomer as composite material; Seamless steel pipe passes through blanking, machining, ball blast, processing helical form method groove or gluing post-drying successively, and 115 ℃ of bake out temperatures, drying time 1.8 hours become A for subsequent use, and glue is the one-component solvent-based adhesive in the gluing process; TPUE becomes B for subsequent use after super-dry, and 100 ℃ of bake out temperatures, drying time 3.5 hours, TPUE be through removal moisture drying, water content 285ppm (mg/kg); After the surface that B is injection-moulded in A by injection molding formed one deck composite bed, polishing namely got post alive or piston rod finished product.
Wherein, injection pressure 65kg, flow velocity 25%, temperature are 205 ℃.
The operation of the steps such as blanking, machining, ball blast, raw material are with embodiment 1.
The performance comparison sheet
Abrasion index: the fiducial value under the abrasion condition (23 ℃ on CS17 wheel, 1000g/ wheel, 5000r/min)
Product and traditional product Performance Ratio are among the present invention
Economic and social profit compares:
Use cost and maintenance cost: this sentences the DWX series of products is 100, and other are and its fiducial value.
The ambient influnence of use procedure: traditional product uses emulsion as hydraulic fluid, and underground discharge meeting causes in various degree pollution to underground water, and new product uses common underground water.
The ambient influnence of manufacturing process: the electro-coppering of traditional product or chemical plating nickel-phosphorus alloy all can be in manufacturing process to environments, and the product among the present invention is injection molding forming method, on environment without impact.
Claims (8)
1. the production method of post alive or fully mechanized mining supporter column piston rod in the hydraulic prop comprises, it is characterized in that: may further comprise the steps:
Step (1): take seamless steel pipe as post or the piston rod matrix of living, TPUE is composite material;
Step (2): seamless steel pipe passes through blanking, machining, ball blast, processing spiral groove or gluing post-drying successively, bake out temperature 110-130 ℃, drying time 1-2 hour;
Step (3): the thermoplastic polyurethane elastic granule is through super-dry, bake out temperature 80-120 ℃, drying time 2-4 hour;
Step (4): make the seamless steel pipe surface that dried TPUE is injection-moulded in after drying in the step (2) in the step (3) form one deck composite bed by injection mo(u)lding, polishing namely gets post alive or piston rod finished product.
2. live in the hydraulic prop described in the according to claim 1 production method of post or fully mechanized mining supporter column piston rod, it is characterized in that: seamless steel pipe is the 27SiMn seamless steel pipe.
3. live in the hydraulic prop described in the according to claim 1 production method of post or fully mechanized mining supporter column piston rod, it is characterized in that: TPUE is thermoplastic polyester polyurethane elastomer, thermoplastic polyether polyurethane elastomer.
4. live in the hydraulic prop described in the according to claim 3 production method of post or fully mechanized mining supporter column piston rod, it is characterized in that: in the described thermoplastic polyester polyurethane elastomer injection moulding mode, injection pressure: 65kg, flow velocity 25%, temperature 205-220 ℃.
5. live in the hydraulic prop described in the according to claim 3 production method of post or fully mechanized mining supporter column piston rod, it is characterized in that: in the described thermoplastic polyether polyurethane elastomer injection moulding mode, injection pressure 65kg, flow velocity 25%, temperature 200-215 ℃.
6. live in the hydraulic prop described in each according to claim 4-5 production method of post or fully mechanized mining supporter column piston rod, its feature exists: injection moulding thickness is 1.5-3mm.
7. live in the hydraulic prop described in the according to claim 1 production method of post or fully mechanized mining supporter column piston rod, it is characterized in that: glue is the special-purpose one-component solvent-based adhesive of TPU in the described gluing process.
8. live in the hydraulic prop described in the according to claim 1 production method of post or fully mechanized mining supporter column piston rod, it is characterized in that: described TPUE needs through removal moisture drying, water content＜300ppm.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210520543.7A CN102979538B (en) | 2012-12-07 | 2012-12-07 | Production method of plunger in individual hydraulic prop or piston rod of fully mechanized mining support upright column |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210520543.7A CN102979538B (en) | 2012-12-07 | 2012-12-07 | Production method of plunger in individual hydraulic prop or piston rod of fully mechanized mining support upright column |
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| CN102979538A true CN102979538A (en) | 2013-03-20 |
| CN102979538B CN102979538B (en) | 2015-05-06 |
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| DE4015084A1 (en) * | 1990-05-11 | 1991-11-14 | Robert Wilhelm Heiliger | METHOD FOR PRODUCING A PISTON-CYLINDER UNIT AND PISTON-CYLINDER UNIT PRODUCED BY THE METHOD |
| CN2709714Y (en) * | 2004-06-04 | 2005-07-13 | 郝健身 | Wear-resisting piston rod |
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| CN102492918A (en) * | 2011-11-29 | 2012-06-13 | 青岛张氏机械有限公司 | Piston rod and production method thereof as well as carbonitriding agent for piston rod surface treatment |
| CN102501026A (en) * | 2011-11-18 | 2012-06-20 | 江苏武进液压启闭机有限公司 | Manufacturing method for piston rod wrapped by stainless steel plate |
| CN102560242A (en) * | 2010-12-15 | 2012-07-11 | 鞍钢股份有限公司 | Production method of seamless steel pipe for single hydraulic prop |
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2012
- 2012-12-07 CN CN201210520543.7A patent/CN102979538B/en not_active Expired - Fee Related
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| DE4015084A1 (en) * | 1990-05-11 | 1991-11-14 | Robert Wilhelm Heiliger | METHOD FOR PRODUCING A PISTON-CYLINDER UNIT AND PISTON-CYLINDER UNIT PRODUCED BY THE METHOD |
| CN2709714Y (en) * | 2004-06-04 | 2005-07-13 | 郝健身 | Wear-resisting piston rod |
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| CN102152068A (en) * | 2011-01-30 | 2011-08-17 | 三一重工股份有限公司 | Method for manufacturing piston rod |
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