阅读说明：本技术 一种铜镍合金管壁厚精准定位装置及其方法 (Accurate positioning device and method for wall thickness of copper-nickel alloy pipe ) 是由 王植栋 浦益龙 周向东 高云龙 陈芳 于 2020-07-09 设计创作，主要内容包括：本发明提供一种铜镍合金管壁厚精准定位装置,包括游动芯头,游动芯头上设置阶梯式安装槽,阶梯式安装槽中设置张力传感器,张力传感器包括应变片结构,应变片结构与阶梯式安装槽相配合,张力传感器连接桥式电路一端,桥式电路另一端通过电缆线连接检测器。本发明提供了一种铜镍合金管壁厚精准定位拉拔方法,可操作性高,应变片结构位于芯头圆锥段,既可以检测出应变,也不会受到游动芯头前圆柱段受大应力的作用,大大提高了应变片结构寿命,采用精确的输出电势控制参数,确保了游动芯头的位移情况得到监控,可以有效识别出尺寸精度差的管材。(The invention provides a precise positioning device for the wall thickness of a copper-nickel alloy pipe, which comprises a moving core head, wherein a stepped mounting groove is formed in the moving core head, a tension sensor is arranged in the stepped mounting groove and comprises a strain gauge structure, the strain gauge structure is matched with the stepped mounting groove, the tension sensor is connected with one end of a bridge circuit, and the other end of the bridge circuit is connected with a detector through a cable. The invention provides a precise positioning and drawing method for the wall thickness of a copper-nickel alloy pipe, which has high operability, the strain gauge structure is positioned in the conical section of a core print, the strain can be detected, the action of large stress on the front cylindrical section of a moving core print can not be caused, the service life of the strain gauge structure is greatly prolonged, the displacement condition of the moving core print is ensured to be monitored by adopting precise output potential control parameters, and the pipe with poor dimensional precision can be effectively identified.)

1. The utility model provides an accurate positioner of copper nickel alloy pipe wall thickness which characterized in that: including the core that moves about, the overhead cascaded mounting groove that sets up of core is moved in the trip, set up tension sensor in the cascaded mounting groove, tension sensor includes the foil gage structure, the foil gage structure cooperatees with cascaded mounting groove, tension sensor connects bridge circuit one end, the bridge circuit other end passes through the cable conductor and connects the detector.

2. The precise positioning device for the wall thickness of the copper-nickel alloy pipe according to claim 1, characterized in that: the moving core head comprises a core head conical section and a rear cylindrical section, and the stepped mounting groove is arranged in the rear cylindrical section.

3. The precise positioning device for the wall thickness of the copper-nickel alloy pipe according to claim 1, characterized in that: cascaded mounting groove is including consecutive first section, interlude, second section, first section, interlude, second section diameter increase in proper order, first section sets up and is close to in the interlude one side of core head conic section, the second section sets up and keeps away from in the interlude first section one side.

4. A method for accurately positioning the wall thickness of a copper-nickel alloy pipe is characterized by comprising the following steps: the method comprises the following steps:

1) selecting a moving core print, wherein the moving core print comprises a core print conical section and a rear cylindrical section which are connected, and a stepped mounting groove is formed in the rear cylindrical section;

2) placing and fixing a tension sensor in the stepped mounting groove, wherein one end of the tension sensor is connected with one end of a bridge circuit, and the other end of the bridge circuit is connected with a detector through a cable;

3) in the drawing process, component force is formed between the outer die and the moving core head to enable the copper-nickel alloy pipe to generate reducing and wall-reducing deformation, the deformation stress is transmitted to the tension sensor to generate strain, potential output is obtained through a bridge circuit, and the potential output is transmitted to a detector through a cable to display the detected pressure.

5. The method for accurately positioning the wall thickness of the copper-nickel alloy pipe according to claim 4, characterized by comprising the following steps of: the tension sensor in the step 1) comprises a strain gauge structure, and the strain gauge structure is matched with the stepped mounting groove.

6. The method for accurately positioning the wall thickness of the copper-nickel alloy pipe according to claim 1, characterized by comprising the following steps of: and 2) fixing the tension sensor in the stepped mounting groove through elastic rubber.

7. The method for accurately positioning the wall thickness of the copper-nickel alloy pipe according to claim 4, characterized by comprising the following steps of: and 3) judging that the moving core print is stable when the output potential is stabilized at V +/-0.5% V, and achieving the accurate positioning requirement.

Technical Field

The invention relates to the technical field of manufacturing of copper-nickel alloy pipes, in particular to a device and a method for accurately positioning the wall thickness of a copper-nickel alloy pipe.

Background

Since the invention of the wall thickness precision control self-drawing process method of the pipe, the invention passes through several development stages of a short core print, a long core rod and a moving core print, particularly the invention of the moving core print, and meets the requirement of the drawing process of the ultra-long pipe.

The dimensions of the pipe comprise an outer diameter, a wall thickness, an inner diameter and a length, and the outer diameter of the pipe depends on the outer die; the inner diameter is determined by the core print; the length depends on the tube blank size and the capacity of the drawing equipment; however, the wall thickness forming factor of the pipe not only depends on the external die and the core print, but also depends on the pipe blank precision, state, lubricating condition, core print precision, adaptability matched with the external die and other factors, and the problem of accurate positioning of the core print at a specific working position in the external die is caused.

The core drawing of the pipe is a continuous reducing and wall reducing process, the positioning precision of the core directly influences the wall thickness precision of the pipe with enough drawn length, and for the continuous detection of the wall thickness precision change of the pipes, no scientific detection method exists at present, and a dynamic accurate detection and control method of the moving core in the drawing process is estimated to be required to be found to judge the amplitude of the displacement of the moving core in the drawing process.

Disclosure of Invention

The invention aims to overcome and supplement the defects in the prior art, and provides a device and a method for accurately positioning the wall thickness of a copper-nickel alloy pipe, which have high operability. The technical scheme adopted by the invention is as follows:

the utility model provides an accurate positioner of copper-nickel alloy pipe wall thickness, wherein: including the core that moves about, the overhead cascaded mounting groove that sets up of core is moved in the trip, set up tension sensor in the cascaded mounting groove, tension sensor includes the foil gage structure, the foil gage structure cooperatees with cascaded mounting groove, tension sensor connects bridge circuit one end, the bridge circuit other end passes through the cable conductor and connects the detector.

Preferably, the accurate positioner of cupronickel pipe wall thickness, wherein: the moving core head comprises a core head conical section and a rear cylindrical section, and the stepped mounting groove is arranged in the rear cylindrical section.

Preferably, the accurate positioner of cupronickel pipe wall thickness, wherein: cascaded mounting groove is including consecutive first section, interlude, second section, first section, interlude, second section diameter increase in proper order, first section sets up and is close to in the interlude one side of core head conic section, the second section sets up and keeps away from in the interlude first section one side.

A method for accurately positioning the wall thickness of a copper-nickel alloy pipe comprises the following steps: the method comprises the following steps:

1) selecting a moving core print, wherein the moving core print comprises a core print conical section and a rear cylindrical section which are connected, and a stepped mounting groove is formed in the rear cylindrical section;

2) placing and fixing a tension sensor in the stepped mounting groove, wherein one end of the tension sensor is connected with one end of a bridge circuit, and the other end of the bridge circuit is connected with a detector through a cable;

3) in the drawing process, component force is formed between the outer die and the moving core head to enable the copper-nickel alloy pipe to generate reducing and wall-reducing deformation, the deformation stress is transmitted to the tension sensor to generate strain, potential output is obtained through a bridge circuit, and the potential output is transmitted to a detector through a cable to display the detected pressure.

Preferably, the method for accurately positioning the wall thickness of the copper-nickel alloy pipe comprises the following steps: the tension sensor in the step 1) comprises a strain gauge structure, and the strain gauge structure is matched with the stepped mounting groove.

Preferably, the method for accurately positioning the wall thickness of the copper-nickel alloy pipe comprises the following steps: and 2) fixing the tension sensor in the stepped mounting groove through elastic rubber.

Preferably, the method for accurately positioning the wall thickness of the copper-nickel alloy pipe comprises the following steps: and (3) judging that the moving core print is stable when the output potential of the step 1) is stabilized at V +/-0.5% V, and achieving the accurate positioning requirement.

The invention has the advantages that:

the invention provides a precise positioning and drawing device and method for the wall thickness of a copper-nickel alloy pipe, the positioning method is high in operability, a strain gauge structure is positioned in a conical section of a core print, strain can be detected, and the strain gauge structure cannot be influenced by the action of large stress on a front cylindrical section of a moving core print, so that the service life of the strain gauge structure is greatly prolonged, and a precise output potential control parameter is adopted, so that the displacement condition of the moving core print is ensured to be monitored, and a pipe with poor size precision can be effectively identified.

Drawings

FIG. 1 is a schematic structural diagram of a precise positioning device for the wall thickness of a copper-nickel alloy tube according to the present invention.

Detailed Description

The invention is further illustrated by the following specific figures and examples.