阅读说明：本技术 一种金属/塑料管材旋转感应焊装置与方法 (Metal/plastic pipe rotary induction welding device and method ) 是由 檀财旺 刘一凡 冯紫微 苏建晖 吴来军 陈波 宋晓国 冯吉才 于 2021-09-16 设计创作，主要内容包括：本发明涉及金属与塑料连接领域,公开了一种金属/塑料管材自动化旋转感应焊装置,所述感应焊装置包括对称设置的输送装置,所述输送装置包括导轨、加压装置；所述导轨设置滑块,所述滑块上方设置支撑架,所述支撑架上方设置第二电机,所述第二电机与减速器连接,所述减速器与三爪卡盘连接；所述加压装置包括第一电机、丝杠,所述丝杆穿过轴承后与第一电机的输出端连接；所述丝杆穿过所述支撑架,第一电机带动丝杠旋转继而带动支撑架运动；所述对称设置的输送装置之间设置感应线圈；所述三爪卡盘的中心固定管材的一端,所述管材的另一端伸入感应线圈内。本发明解决了现有技术中金属/塑料管材连接界面连接面积过小且强度较低的问题,构思巧妙,适应性强。(The invention relates to the field of connection of metal and plastic, and discloses an automatic rotary induction welding device for metal/plastic pipes, which comprises symmetrically arranged conveying devices, wherein each conveying device comprises a guide rail and a pressurizing device; the guide rail is provided with a sliding block, a support frame is arranged above the sliding block, a second motor is arranged above the support frame and connected with a speed reducer, and the speed reducer is connected with the three-jaw chuck; the pressurizing device comprises a first motor and a lead screw, and the lead screw penetrates through the bearing and is connected with the output end of the first motor; the screw rod penetrates through the support frame, and the first motor drives the screw rod to rotate so as to drive the support frame to move; induction coils are arranged between the symmetrically arranged conveying devices; one end of a pipe is fixed at the center of the three-jaw chuck, and the other end of the pipe extends into the induction coil. The invention solves the problems of over-small connecting area and low strength of the connecting interface of the metal/plastic pipe in the prior art, and has ingenious conception and strong adaptability.)

1. The metal/plastic pipe rotary induction welding device is characterized by comprising symmetrically arranged conveying devices (19), wherein each conveying device (19) comprises a guide rail (13) and a pressurizing device;

a sliding block (12) is arranged on the guide rail (13), a supporting frame (11) is arranged above the sliding block (12), a second motor (5) is arranged above the supporting frame (11), the second motor (5) is connected with a speed reducer (6), and the speed reducer (6) is connected with a three-jaw chuck (7);

the pressurizing device comprises a first motor (1) and a lead screw (4), and the lead screw (4) penetrates through a bearing and then is connected with the output end of the first motor (1); the lead screw (4) penetrates through the support frame (11), and the first motor (1) drives the lead screw (4) to rotate so as to drive the support frame (11) to move;

induction coils (16) are arranged between the symmetrically arranged conveying devices (19);

the center of the three-jaw chuck (7) is used for fixing one end of a pipe, and the other end of the pipe extends into the induction coil (16).

2. The metal/plastic pipe rotary induction welding device according to claim 1, characterized in that said induction welding device comprises an infrared temperature measuring device (17), the probe of said infrared temperature measuring device (17) being aimed at the metal/plastic connection interface.

3. The metal/plastic pipe rotary induction welding device according to claim 2, wherein the infrared temperature measuring device (17) and the induction coil (16) are both connected with a computer control system, the infrared temperature measuring device (17) transmits the interface temperature measured in real time to the computer control system, and the computer control system analyzes and processes the interface temperature and then regulates and controls the voltage of the induction coil (16).

4. The metal/plastic pipe rotary induction welding device according to claim 1, characterized in that it comprises a rotating guide wheel (8) placed in front of the guide rail (13), the center of said rotating guide wheel (8) being in the same horizontal plane as the center of the three-jaw chuck (7).

5. The metal/plastic pipe rotary induction welding device according to claim 4, characterized in that the rotating guide wheels (8) comprise three small guide wheels, the distance between the small guide wheels is equivalent to the outer diameter of the pipe, and the pipe passes through the three small guide wheels and then extends into the induction coil (16).

6. The metal/plastic pipe rotary induction welding device according to claim 1, characterized in that said lead screw (4) is connected with a first motor (1) through a coupling (2).

7. The metal/plastic pipe rotary induction welding apparatus according to claim 1, characterized in that said three-jaw chuck (7) is connected with a reducer (6) through a spline shaft.

8. The metal/plastic pipe rotary induction welding device according to claim 1, characterized in that said induction coil (16) is arranged in the middle of two conveyors (19).

9. The metal/plastic pipe rotary induction welding device according to claim 1, characterized in that said first motor (1) is a pressurizing motor and said second motor (5) is a rotating motor.

10. A measuring method using the metal/plastic pipe rotary induction welding device according to any one of claims 3 to 9, characterized in that the method comprises the steps of:

(1) respectively fixing the metal pipe and the plastic pipe in three-jaw chucks which are symmetrically arranged so that the axes of the two pipes are in a straight line;

(2) starting a first motor, driving a screw rod to rotate by the first motor, further driving a support frame to move, adjusting two pipes to be in contact in an induction coil, and electrifying the induction coil;

(3) adjusting the rotating speeds of symmetrically arranged second motors, wherein the rotating speeds of the second motors are the same, and the rotating directions are opposite;

(4) starting the infrared temperature measuring device, and adjusting the position of the probe to align the probe to the contact position of the two pipes in the induction coil;

(5) the infrared temperature measuring device transmits the interface temperature to the computer control system in real time, the computer control system processes data, and further controls the voltage of the induction coil to realize automatic adjustment.

Technical Field

The invention relates to the field of metal/plastic induction welding connection, in particular to a metal/plastic pipe rotary induction welding device and method.

Background

With the rapid development of the recent heavy industry, the problems of insufficient energy, environmental pollution and the like are solved, the light weight is increasingly required in the fields of automobiles, rail transit and the like, and the advanced concept of light weight of a dissimilar material composite structure is introduced. The metal and plastic mixed connection is adopted to replace metal and metal connection, so that the structural weight is greatly reduced, and the lightweight development of the composite structure is realized. The fiber reinforced thermoplastic resin matrix composite material with high specific strength replaces part of metal materials, so that the weight of the joint is greatly reduced.

Because the metal and the plastic have great difference in the thermal and physical properties such as melting point, decomposition temperature, thermal expansion coefficient and the like and molecular structures, the metal and the plastic cannot be connected by the traditional fusion welding. The methods currently applied to metal-to-plastic connections can be summarized as: riveting, gluing, friction stir welding, hot pressure welding, laser welding, induction welding and other thermal connecting methods. The induction welding connection metal plastic has the advantages of small stress concentration and high welding efficiency, is convenient for the connection of the pipe, and can realize the quick and reliable welding of the metal and the plastic pipe. The automatic rotary induction welding equipment can realize the welding of metal and plastic, can realize the pressurization of a welding seam in the welding process so as to realize reliable welding, and can measure the temperature in real time and control the interface temperature in the connecting process. At present, applicable metal and plastic connection methods such as a connection method of plastic and metal heterostructure (application number 201610590686.3) can realize laser welding of metal and plastic, but the method has small connection area and low connection strength, and can not realize connection of pipes.

Disclosure of Invention

The invention provides a metal/plastic pipe rotary induction welding device and method, aiming at solving the problems of small metal/plastic interface connection area and low strength in the prior art.

The invention adopts the specific scheme that: a metal/plastic pipe rotary induction welding device comprises symmetrically arranged conveying devices, wherein each conveying device comprises a guide rail and a pressurizing device;

the guide rail is provided with a sliding block, a support frame is arranged above the sliding block, a second motor is arranged above the support frame and connected with a speed reducer, and the speed reducer is connected with the three-jaw chuck;

the pressurizing device comprises a first motor and a lead screw, and the lead screw penetrates through the bearing and is connected with the output end of the first motor; the screw rod penetrates through the support frame, and the first motor drives the screw rod to rotate so as to drive the support frame to move;

induction coils are arranged between the symmetrically arranged conveying devices;

one end of a pipe is fixed at the center of the three-jaw chuck, and the other end of the pipe extends into the induction coil.

The induction welding device comprises an infrared temperature measuring device, and a probe of the infrared temperature measuring device is aligned with the metal/plastic connecting interface.

The induction welding device comprises a rotating guide wheel arranged in front of the guide rail, and the center of the rotating guide wheel and the center of the three-jaw chuck are on the same horizontal plane.

The rotating guide wheels comprise three small guide wheels, the distance between the three small guide wheels is equal to the outer diameter of the pipe, and the pipe penetrates through the three small guide wheels and then extends into the induction coil.

The infrared temperature measuring device and the induction coil are connected with the computer control system, the infrared temperature measuring device transmits the interface temperature measured in real time to the computer control system, and the computer control system regulates and controls the voltage of the induction coil after analyzing and processing.

The lead screw is connected with the first motor through a coupler.

The three-jaw chuck is connected with the speed reducer through a spline shaft.

The induction coil is arranged between the two conveying devices.

The first motor is a pressurizing motor, and the second motor is a rotating motor.

In another aspect, the present invention provides a measuring method of a metal/plastic pipe rotary induction welding device, comprising the steps of:

(1) respectively fixing the metal pipe and the plastic pipe in three-jaw chucks which are symmetrically arranged so that the axes of the two pipes are in a straight line;

(2) starting a first motor, driving a screw rod to rotate by the first motor, further driving a support frame to move, adjusting two pipes to be in contact in an induction coil, and electrifying the induction coil;

(3) adjusting the rotating speeds of the second motors which are symmetrically arranged, wherein the rotating speeds of the two sides are the same, and the rotating directions are opposite;

(4) starting the infrared temperature measuring device, and adjusting the position of the probe to align the probe to the contact position of the two pipes in the induction coil;

(5) the infrared detection device transmits the interface temperature to the computer control system in real time, the computer control system processes data, and further controls the voltage of the induction coil to realize automatic adjustment.

Compared with the prior art, the invention has the following beneficial effects:

1. according to the invention, two groups of conveying devices are symmetrically arranged, the three-jaw chuck is arranged in each conveying device, the metal and the plastic pipe are respectively arranged in the three-jaw chuck, and the position between the metal and the plastic pipe is adjusted to enable the joint of the metal and the plastic pipe to be in the induction coil to complete induction welding, so that the problems of over-small connecting area and low strength of a metal/plastic pipe connecting interface in the prior art are solved.

2. According to the invention, the infrared temperature measuring device is arranged outside the induction coil, the infrared detection device transmits the interface temperature to the computer control system in real time, and the computer control system controls the induction voltage according to the interface temperature, so that automatic adjustment is realized.

3. According to the invention, the rotation speed of the second motors on the left side and the right side is adjusted, so that the metal and the plastic pipe can synchronously rotate, the molten resin generates centrifugal force in the induction welding connection process, the connection of the metal and the plastic pipe is realized, the position of the probe of the infrared detection device is aligned to the side of the metal and plastic pipe connection joint, which is opposite to the plastic pipe, and the effective monitoring on the stable interface is realized.

4. The induction welding device is used for finishing the induction welding of metal and plastic, and the automatic control rotary induction welding reliable connection of metal/plastic pipes can be realized.

Drawings

FIG. 1 is a schematic view of a conveyor apparatus according to the present invention;

FIG. 2 is a schematic view of an induction welding apparatus according to the present invention;

fig. 3 is a schematic view of the assembly of the metal/plastic pipe provided by the present invention.

Wherein the reference numerals are respectively:

1-a first electric machine; 2-a coupler; 3-a bearing; 4-a lead screw; 5-a second motor; 6-a speed reducer; 7-a three-jaw chuck; 8-rotating the guide wheel; 9-a first motor mount; 10-lead screw fixing frame; 11-a support frame; 12-a slide block; 13-a guide rail; 14-rotating the guide wheel frame; 15-metal tubing; 16-an induction coil; 17-an infrared temperature measuring device; 18-plastic tubing; 19-conveying means.

Detailed Description

The invention is further described with reference to the following figures and detailed description.

A metal/plastic pipe rotary induction welding device comprises symmetrically arranged conveying devices 19, wherein each conveying device 19 comprises a guide rail 13 and a pressurizing device;

the guide rail 13 is provided with a sliding block 12, a support frame 11 is arranged above the sliding block 12, a second motor 5 is arranged above the support frame 11, the second motor 5 is connected with a speed reducer 6, and the speed reducer 6 is connected with a three-jaw chuck 7;

the pressurizing device comprises a first motor 1 and a lead screw 4, wherein the lead screw 4 penetrates through a bearing and then is connected with the output end of the first motor 1; the lead screw 4 penetrates through the support frame 11, and the first motor 1 drives the lead screw 4 to rotate so as to drive the support frame 11 to move;

induction coils 16 are arranged between the symmetrically arranged conveying devices 19;

the center of the three-jaw chuck 7 fixes one end of a pipe, and the other end of the pipe extends into the induction coil 16.

The induction welding device comprises an infrared temperature measuring device 17, and a probe of the infrared temperature measuring device 17 is aligned with a connecting interface of the metal pipe 15 and the plastic pipe 18.

The induction welding device comprises a rotating guide wheel 8 arranged in front of a guide rail 13, and the center of the rotating guide wheel 8 and the center of the three-jaw chuck 7 are on the same horizontal plane.

The rotating guide wheels 8 comprise three small guide wheels, the distance between the three small guide wheels is equal to the outer diameter of the pipe, and the pipe penetrates through the three small guide wheels and then extends into the induction coil 16.

The infrared temperature measuring device 17 and the induction coil 16 are both connected with a computer control system, the infrared temperature measuring device 17 transmits the interface temperature measured in real time to the computer control system, and the computer control system regulates and controls the voltage of the induction coil 16 after analyzing and processing. The infrared temperature measuring device is an infrared thermometer.

The first motor 1 is connected with the coupler 2, and the lead screw 4 penetrates through the coupler hole to be connected with the first motor 1.

The three-jaw chuck 7 is connected with the speed reducer 6 through a spline shaft.

And a rotary guide wheel frame 14 is arranged below the small guide wheel, and the rotary guide wheel frame 14 is an openable support.

The first motor is a pressurizing motor, and the second motor is a rotating motor.

The size of the induction welding coil can be selected and is determined by the size of metal and plastic pipes and the connection size, and the inner diameter of the induction welding coil is 20-150 mm. The size range of the metal and plastic pipe is variable, the length is 100mm-600mm, and the outer diameter is 10-130 mm. The rotary guide wheel frame can be opened and closed, and meets the requirements of pipe supports and rotation of pipes with different sizes. The rotating guide wheel is made of rubber, and the connecting device is made of stainless steel. The metal pipe is one of stainless steel, aluminum alloy, titanium alloy and magnesium alloy. The plastic pipe is polyether ether ketone (PEEK), nylon (PA), polyethylene terephthalate (PET), polyphenylene sulfide (PPS), carbon fiber reinforced polyether ether ketone (CF-PEEK), carbon fiber reinforced nylon (CF-PA), carbon fiber reinforced polyethylene terephthalate (CF-PET), carbon fiber reinforced polyphenylene sulfide (CF-PPS), glass fiber reinforced polyether ether ketone (GF-PEEK), glass fiber reinforced nylon (GF-PA), glass fiber reinforced polyethylene terephthalate (GF-PET) or glass fiber reinforced polyphenylene sulfide (GF-PPS).

In another aspect, the present invention provides a measuring method of a metal/plastic pipe rotary induction welding device, comprising the steps of:

(1) respectively fixing the metal steel pipe and the plastic pipe in three-jaw chucks which are symmetrically arranged so that the axes of the two pipes are in a straight line;

(2) starting a first motor, driving a screw rod to rotate by the first motor, further driving a support frame to move, adjusting two pipes to be in contact in an induction coil, and electrifying the induction coil;

(3) adjusting the rotating speeds of the second motors which are symmetrically arranged, wherein the rotating speeds of the second motors on the two sides are the same, and the rotating directions are opposite;

(4) starting the infrared temperature measuring device, and adjusting the position of the probe to align the probe to the contact position of the two pipes in the induction coil;

(5) the infrared detection device transmits the interface temperature to the computer control system in real time, the computer control system processes data, and further controls the voltage of the induction coil to realize automatic adjustment.

The conveying device is symmetrically arranged, namely the initial positions of all parts of the conveying device are symmetrically arranged.

When the metal pipe and the plastic pipe are connected, the three-jaw chucks on two sides are controlled to be positioned at two ends of the induction welding device by using the first motor, the ends, which are not to be welded, of the pipe are fixed on the three-jaw chucks on two sides respectively, the extending parts of the two pipes are lapped on the rotating guide wheels at the left end and the right end respectively, and the guide wheel deflection angles symmetrically distributed on two sides of the rotating guide wheel set are adjusted, so that the axes of the two pipes are positioned in a straight line. The position of the pipe is adjusted by using a first motor, so that the metal and the plastic pipe form a butt joint, a certain pressure is formed by butting the joint part by using the first motor, and the joint is positioned in the middle of the induction coil; and the rotating speeds of the second motors on the left side and the right side are adjusted to enable the metal and the plastic pipe to synchronously rotate, so that the molten resin generates centrifugal force in the induction welding connection process. The connection of metal and plastic pipes is realized, the probe position of the infrared detection device is aligned with the side of the plastic pipe deviated from the plastic pipe of the plastic soaking and plastic pipe connecting joint, the interface temperature is transmitted to the computer control system by the infrared detection device in real time, and the computer control system controls the induction voltage according to the interface temperature to realize automatic adjustment.

The infrared detection device transmits the interface temperature to the computer control system in real time, and the computer control system processes data and judges whether the interface temperature is at the proper welding temperature of the metal and the plastic pipe. If the interface temperature is lower than the proper welding temperature, the computer control system raises the induction voltage, and if the interface temperature is higher than the proper welding temperature, the computer control system lowers the induction voltage to realize automatic regulation, so that the interface temperature is always stable in the proper welding temperature range in the connection process, the defects of disconnection, decomposition of bubbles and the like in the connection process are reduced or eliminated, and the reliable connection of the metal and the plastic pipe is realized.

Example 1

The metal to be welded is a 304 stainless steel pipe, the length of the pipe is 300mm, the outer diameter of the pipe is 80mm, and the inner diameter of the pipe is 60 mm; the plastic to be welded is a carbon fiber reinforced polyether-ether-ketone pipe with the length of 300mm, the outer diameter of 80mm, the inner diameter of 50mm, the protruding length of the front section of 50mm, the outer diameter of 60mm and the inner diameter of 50 mm.

The invention provides a measuring method of an automatic rotary induction welding device for metal/plastic pipes, which comprises the following steps:

(1) respectively fixing the metal steel pipe and the plastic pipe in three-jaw chucks which are symmetrically arranged so that the axes of the two pipes are in a straight line;

(2) starting a first motor, wherein the first motor drives a screw rod to rotate so as to drive a support frame to move, and two pipes are adjusted to be in contact in an induction coil;

(3) adjusting the rotating speeds of the second motors which are symmetrically arranged, wherein the rotating speeds of the two sides are the same, and the rotating directions are opposite;

(4) starting the infrared temperature measuring device, and adjusting the position of the probe to align the probe to the contact position of the two pipes in the induction coil;

(5) the infrared detection device transmits the interface temperature to the computer control system in real time, the computer control system processes data, and further controls the voltage of the induction coil to realize automatic adjustment.

Fixing the non-to-be-welded ends of the 304 stainless steel pipe and the carbon fiber reinforced polyether-ether-ketone pipe to three-jaw chucks on two sides respectively, lapping the extending parts of the two pipes on a rotating guide wheel respectively, and adjusting the deflection angle of the rotating guide wheel to enable the axes of the two pipes to be in a straight line. The positions of the 304 stainless steel pipe and the carbon fiber reinforced polyether ether ketone pipe are adjusted by using the first motor, so that the protruding part of the end to be welded of the carbon fiber reinforced polyether ether ketone pipe is inserted into the end to be welded of the stainless steel pipe to form an overlap joint, a certain pressure is formed on the joint part, the reliable connection of the 304 stainless steel pipe and the joint part of the carbon fiber reinforced polyether ether ketone pipe is facilitated, and the joint is positioned in the middle of the induction coil.

The rotating speeds of the symmetrical rotating motors are adjusted to be the same at the two sides, and the rotating directions are opposite, so that the 304 stainless steel pipe and the carbon fiber reinforced polyether-ether-ketone pipe can synchronously rotate, molten resin generates centrifugal force in the induction welding connection process, and reliable connection of the lap joint part of the 304 stainless steel pipe and the carbon fiber reinforced polyether-ether-ketone pipe is facilitated.

And opening the infrared detection device, and adjusting the position of the probe to align the connection joint of the 304 stainless steel pipe and the carbon fiber reinforced polyether-ether-ketone pipe to the side opposite to the carbon fiber reinforced polyether-ether-ketone pipe, so that the interface temperature of the carbon fiber reinforced polyether-ether-ketone pipe in the connection process can be conveniently detected. The infrared detection device transmits the interface temperature to the computer control system in real time, the computer control system processes data, and whether the interface temperature is at the proper welding temperature of 304 stainless steel and the carbon fiber reinforced polyether-ether-ketone material is judged. If the interface temperature is lower than the proper welding temperature, the computer control system raises the induction voltage, and if the interface temperature is higher than the proper welding temperature, the computer control system lowers the induction voltage to realize automatic adjustment, so that the interface temperature is always stable in the proper welding temperature range in the connection process, the defects of non-connection, decomposition of bubbles and the like in the connection process are reduced or eliminated, and the reliable connection of the 304 stainless steel pipe and the carbon fiber reinforced polyether-ether-ketone pipe is realized.

At present, the method for connecting metal and plastic cannot have the characteristic of efficient large-area connection at the same time, and a special connecting device for metal and plastic pipes is not available at present. The invention can realize high-efficiency large-area connection, can control the connection area, and provides related functional design according to the requirement of metal and plastic connection. The connection interface of the metal and the plastic needs a certain pressure, and the invention provides a certain pressure for the connection interface through the pressurization of the motor and the rotating centrifugal force; the requirement on temperature is high in the process of connecting metal and plastic, and the interface temperature is accurately controlled in a computer control system through an infrared temperature measuring device; the method and the device can realize reliable connection between the metal and the plastic pipe, so that the joint can bear higher tensile force and shearing force, and the high-efficiency large-area high-strength connection between the metal and the plastic pipe is realized.

The invention has the advantages of ingenious conception, reasonable design and strong adaptability, and can adapt to different sizes of metal and plastic pipes. The pressure requirement in the induction welding connection process is realized through the pressurizing device and the rotating device, the real-time measurement and regulation of the temperature of the connection interface are realized through the infrared temperature measuring device and the computer control system, and the automatic control reliable connection of the rotary induction welding of the metal/plastic pipe is realized.