阅读说明：本技术 一种盘卷抽油杆的生产方法 (Production method of coiled sucker rod ) 是由 吕刚 涛雅 赵晓敏 杨鲁明 白月琴 于 2021-06-03 设计创作，主要内容包括：本发明公开了一种盘卷抽油杆的生产方法,包括：将棒材温度控制和输送系统设置于精轧后的棒材冷床线旁,轧制后的轧件经冷却装置进行快速冷却,冷却到500～550℃时通过卷曲机；卷曲作业系统主要设备包括剪切机、“智能”夹送辊、活套器、棒材喂线器、二台卷曲机；二台所述卷曲机交替工作,其中一台进行棒材卷曲时,另一台卸卷,轧件卷成盘卷,然后空冷到室温；在盘卷精整区将无扭棒卷自动打捆、称量后,输送到指定位置。本发明的目的是提供一种可改善切头及表面质量,提高成材率与定尺率的采用大盘卷工艺生产抽油杆等棒材产品的方法。(The invention discloses a production method of a coiled sucker rod, which comprises the following steps: arranging a bar temperature control and conveying system beside a finish-rolled bar cooling bed line, rapidly cooling a rolled piece by a cooling device, and passing the rolled piece through a crimping machine when the rolled piece is cooled to 500-550 ℃; the main equipment of the curling operation system comprises a shearing machine, an intelligent pinch roll, a looper, a bar feeder and two curling machines; the two curling machines work alternately, when one curling machine curls the bar, the other curling machine unloads the coil, the rolled piece is coiled into a coil, and then the coil is cooled to room temperature by air; and automatically bundling and weighing the non-twisted rod coil in a coil finishing area, and conveying the non-twisted rod coil to a designated position. The invention aims to provide a method for producing rod products such as sucker rods and the like by adopting a large-coiling process, which can improve the quality of cut ends and surfaces and improve the yield and the fixed length.)

1. A production method of coiled sucker rods is characterized in that: the method comprises the following steps:

arranging a bar temperature control and conveying system beside a finish-rolled bar cooling bed line, rapidly cooling a rolled piece by a cooling device, and passing the rolled piece through a crimping machine when the rolled piece is cooled to 500-550 ℃;

the main equipment of the curling operation system comprises a shearing machine, an intelligent pinch roll, a looper, a bar feeder and two curling machines; the shearing machine at the inlet of the reel type crimping machine is used for shearing the head and the tail of the bar, the loop is used for ensuring tension-free crimping and uniform and tidy cloth winding of each layer of bar, the bar feeder is used for neatly and consistently winding the bar onto the reel and forming a bar roll with a perfect shape, and the crimping machine is used for crimping the bar into a coil; the two curling machines work alternately, when one curling machine curls the bar, the other curling machine unloads the coil, the rolled piece is coiled into a coil, and then the coil is cooled to room temperature by air;

and automatically bundling and weighing the non-twisted rod coil in a coil finishing area, and conveying the non-twisted rod coil to a designated position.

2. The method of producing a coiled sucker rod of claim 1 wherein: the crimping machine comprises a rotating reel, a bar head clamping and guiding device for crimping.

3. The method of producing a coiled sucker rod of claim 1 wherein: the rotating reel spool is provided with a tension leg to facilitate unwinding.

Technical Field

The invention relates to the technical field of metallurgy and steel rolling, in particular to a production method of a coiled sucker rod.

Background

At present, 20CrMoA, 30CrMoA and 25MnVRE series steel type sucker rod round steel is successfully developed by some domestic metallurgical enterprises. The product has been radiated to many petroleum machinery manufacturers. The petroleum machinery manufacturing enterprises give full certainty on the product quality. Still mainly utilize bar rolling production line tissue production now, the product is delivered with straight strip attitude, but rod production sucker rod steel has some problems, mainly shows: poor quality of cut ends, defective surface quality (pitted surface, scratch), low yield, etc. The user requires the sucker rod steel to be completely sized, so that the yield is reduced by about 4 percent, and the problems of end face shearing, a horseshoe opening, a triangular head and the like of a cold shearing machine are caused.

In the past, the punch press is adopted to perform end offline secondary supplementary processing, but the efficiency is low, the manual labor intensity is high, and secondary damage is easily caused to the product quality.

Disclosure of Invention

In order to solve the technical problems, the invention aims to provide a method for producing rod products such as sucker rods and the like by adopting a large-coiling process, which can improve the quality of cut ends and surfaces and improve the yield and the fixed length.

In order to solve the technical problems, the invention adopts the following technical scheme:

the invention relates to a production method of a coiled sucker rod, which comprises the following steps:

arranging a bar temperature control and conveying system beside a finish-rolled bar cooling bed line, rapidly cooling a rolled piece by a cooling device, and passing the rolled piece through a crimping machine when the rolled piece is cooled to 500-550 ℃;

the main equipment of the curling operation system comprises a shearing machine, an intelligent pinch roll, a looper, a bar feeder and two curling machines; the shearing machine at the inlet of the reel type crimping machine is used for shearing the head and the tail of the bar, the loop is used for ensuring tension-free crimping and uniform and tidy cloth winding of each layer of bar, the bar feeder is used for neatly and consistently winding the bar onto the reel and forming a bar roll with a perfect shape, and the crimping machine is used for crimping the bar into a coil; the two curling machines work alternately, when one curling machine curls the bar, the other curling machine unloads the coil, the rolled piece is coiled into a coil, and then the coil is cooled to room temperature by air;

and automatically bundling and weighing the non-twisted rod coil in a coil finishing area, and conveying the non-twisted rod coil to a designated position.

Further, the crimping machine comprises a rotating reel, a bar head clamping and guiding device for crimping.

Further, the rotating reel is provided with a tension core column to facilitate the coil stripping.

Compared with the prior art, the invention has the beneficial technical effects that:

the reel type rod rolling technology is a new technology in the field of rod production, and creates a precedent for producing high-quality, ultra-compact and heavy non-twist round steel and square steel coils. The rod products such as the sucker rod and the like are produced by adopting a large coiling process, and then the products are straightened to supply the products, so that the yield and the product scale rate of the products can be improved, the scale length is cut according to the requirements of users, the end surface cutting quality of the sucker rod is improved, and the economic benefit is obviously improved.

Detailed Description

A production method of coiled sucker rod adopts a large coil production line, and is characterized by that an on-line control cooling system and a large coil coiling production line are arranged behind a finishing mill. The system is divided into three system areas: (1) a wire rod temperature control and conveying system; (2) a curling operation area; (3) and the coiling machine coils a finishing area.

The wire rod material temperature control and conveying system is positioned between the outlet of the water tank after finish rolling and the curling area. The line is positioned beside the bar cooling bed line and consists of a set of water cooling tank and a conduit. At the inlet of the reel crimper there is a crop/tail shear. And (4) rapidly cooling the rolled piece by a cooling device, and passing the rolled piece through a crimping machine when the rolled piece is cooled to 500-550 ℃. Excellent uniformity of mechanical properties of the coiled rolled stock can be achieved by performing the winding in this temperature range. The process control temperature can form fine-grained steel, and an automatic tempering process is carried out after the steel is curled, so that the rolling stress of the steel can be eliminated, and the further cold processing of the steel is facilitated.

The main equipment of the curling zone comprises: an intelligent pinch roll and a looper which ensures no tension to curl and uniform and tidy cloth roll for each layer of bar. And the bar feeder is used for neatly and consistently winding the bars onto a winding shaft to form a bar roll with a perfect appearance. The two curling machines work alternately, and when one machine curls the bar, the other machine unloads the roll. Each crimping machine consists of a rotating reel, a bar head clamping and guiding device for crimping. The reel shaft is provided with a tensioning core column so as to facilitate the coil unloading. And rolling the rolled piece into a coil, and then air-cooling to room temperature.

And automatically bundling and weighing the non-twisted rod coil in a coil finishing area, and conveying the non-twisted rod coil to a designated position.

The reel type rod rolling technology is a new technology in the field of rod production, and creates a precedent for producing high-quality, ultra-compact and heavy non-twist round steel and square steel coils. The characteristic non-failure uncoiling characteristic of the coil enables the reel type coil to be directly sent to a downstream process, and the conversion cost is obviously saved. The designed production capacity of the rod and roll production line is 100 tons/hour, the highest speed is 35 m/s, the non-twisted round steel and the water-cooling threaded steel bar with the diameter of 12-52 mm can be produced, and the roll weight is up to 3.5 tons. The method is characterized in that:

firstly, the temperature control parameters of the large coil of the bar material have slight difference in different specifications. The setting of controlled cooling process parameters such as the initial rolling temperature, the final rolling speed, the curling temperature and the like needs to accurately control the temperature of the austenite phase transformation interval and the transformation finishing time so as to obtain a proper ferrite pearlite structure, strength and excellent plasticity index, so that the coil has excellent comprehensive performance.

Secondly, the control parameters of the bar material coiling machine are related to the product specification and the finishing rolling speed. The set parameters need to ensure no-tension curling and uniform and tidy yardage rolls for each layer of bars. And product defects such as indentation, scratch and the like are not allowed to be generated in the curling process, and the rod roll with a perfect appearance is formed.

The reel type rod rolling technology is a new technology in the field of rod production, and creates a precedent for producing high-quality, ultra-compact and heavy non-twist round steel and square steel coils. The rod products such as the sucker rod and the like are produced by adopting a large coiling process, and then the products are straightened to supply the products, so that the yield and the product scale rate of the products can be improved, the scale length is cut according to the requirements of users, the end surface cutting quality of the sucker rod is improved, and the economic benefit is obviously improved.

The above-described embodiments are merely illustrative of the preferred embodiments of the present invention, and do not limit the scope of the present invention, and various modifications and improvements of the technical solutions of the present invention can be made by those skilled in the art without departing from the spirit of the present invention, and the technical solutions of the present invention are within the scope of the present invention defined by the claims.