Temperature measuring device for extruded profiles

Abstract

This invention provides a temperature measuring device for extruded profiles that can accurately measure the surface temperature of extruded profiles having various shapes. [Solution] An extruded profile temperature measuring device 1 is provided, which has a temperature measuring unit (lens 12) for measuring the surface temperature of an extruded profile 2 extruded from an extruder 3 that performs extrusion molding, and is characterized by comprising a lifting means 20 for raising and lowering the temperature measuring unit, a lateral moving means 30 for moving the temperature measuring unit in the width direction of the extruded profile 2, and a rotating means 40 for changing the orientation of the temperature measuring unit. The lifting means 20 comprises a shaft member 21 configured with a ball screw and a support part 22 for raising and lowering the shaft member 21 to adjust its position, the lateral moving means 30 comprises a beam member 31 provided at the lower end of the shaft member 21 and extending in the width direction of the extruded profile 2, and a moving member 32 that moves along the beam member 31, and the rotating means 40 comprises a rotating member 41 that is rotatably provided on the moving member 32.

Description

[Technical Field]

[0001] The present invention relates to a temperature measuring device for extruded profiles. [Background Art]

[0002] In order to detect defects in an extruded profile, it is effective to measure the temperature of the profile immediately after extrusion. Patent Document 1 discloses a non-contact temperature measurement method based on infrared sensing for temperature measurement of extruded profiles. Patent Document 2 discloses an extrusion control method that controls extrusion conditions according to the obtained profile temperature. [Prior Art Documents] [Patent Documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 61-119324 [Patent Document 2] Japanese Patent Publication No. 7-121409 [Summary of the Invention] [Problem to be Solved by the Invention]

[0004] When applying the extrusion control method of Patent Document 2 to aluminum extrusion, it is necessary to accurately measure the surface temperature of the product extruded profile immediately after extrusion. However, since extruded profiles made of aluminum alloy have various shapes depending on their applications, the temperature measurement methods disclosed in Patent Documents 1 and 2 cannot adapt to the shapes of extruded profiles, and have the problem that accurate measurement of surface temperature is difficult.

[0005] Accordingly, the present invention has been made in view of the above problem, and an object of the present invention is to provide a temperature measuring device for extruded profiles that can accurately measure the surface temperature of extruded profiles having various shapes. [Means for Solving the Problem]

[0006] To solve these problems, the present invention provides a temperature measuring device for extruded profiles, which includes a temperature measuring unit for measuring the surface temperature of an extruded profile extruded from an extruder performing extrusion molding, and is characterized by comprising a lifting means for raising and lowering the temperature measuring unit, a lateral moving means for moving the temperature measuring unit in the width direction of the extruded profile, and a rotating means for changing the orientation of the temperature measuring unit.

[0007] According to the present invention, the temperature measuring device for extruded profiles can be raised and lowered, moved laterally, and rotated according to the shape of the extruded profile, so that the temperature measuring device can be positioned perpendicularly to the measurement position of the extruded profile and close to it. Therefore, the surface temperature of extruded profiles of various shapes can be accurately measured.

[0008] In the temperature measuring device for extruded profiles of the present invention, it is preferable that the lifting means comprises a shaft member equipped with a ball screw and a support part for adjusting the position by raising and lowering the shaft member, the lateral movement means comprises a beam member provided at the lower end of the shaft member and extending in the width direction of the extruded profile and a movable member that moves along the beam member, and the rotation means comprises a rotating member rotatably provided on the movable member. With such a configuration, the lifting, lateral movement, and rotation of the temperature measuring unit can be performed easily and accurately.

[0009] Furthermore, in the temperature measuring device for extruded profiles of the present invention, it is preferable to further include an outer edge monitoring means for monitoring the shape of the outer edge of the extruded profile extruded from the extruder. With such a configuration, it is possible to detect misalignment of the outer edge of the extruded profile. This makes it possible to further improve the accuracy of temperature measurement of the extruded profile.

[0010] Furthermore, in the temperature measuring device for extruded profiles of the present invention, it is preferable that the outer edge monitoring means comprises a backlight provided below the extruded profile, a camera that captures the shadow of the outer edge of the extruded profile generated by the backlight, and an image processing device that detects deformation of the outer edge of the extruded profile from the image captured by the camera. With such a configuration, deformation of the outer edge can be detected by capturing the shadow of the outer edge of the extruded profile illuminated by the backlight with a camera and reading the boundary between light and dark with the image processing device.

[0011] Furthermore, the temperature measuring device for extruded profiles of the present invention is preferably further equipped with a distance measuring means provided above the extruded profile as it is extruded from the extruder, for non-contact measurement of the height position of the extruded profile. With such a configuration, vertical displacement of the extruded profile can be detected. This further improves the accuracy of temperature measurement of the extruded profile. [Effects of the Invention]

[0012] According to the temperature measuring device for extruded profiles of the present invention, the surface temperature of extruded profiles having various shapes can be accurately measured. [Brief explanation of the drawing]

[0013] [Figure 1] This is a front view showing a temperature measuring device for extruded profiles according to an embodiment of the present invention. [Figure 2] This is a side view showing a temperature measuring device for extruded profiles according to an embodiment of the present invention. [Figure 3] This is a front view showing the movement state of the main part of a temperature measuring device for extruded profiles according to an embodiment of the present invention. [Modes for carrying out the invention]

[0014] A temperature measuring device for extruded profiles according to an embodiment of the present invention will be described in detail with reference to the drawings. As shown in Figure 2, the temperature measuring device 1 for extruded profiles (hereinafter referred to as "temperature measuring device 1") is a device for measuring the surface temperature of an extruded profile 2 extruded from an extruder 3, and is positioned near the extrusion port 4 from which the extruded profile 2 is extruded. A plurality of rollers 5 that support the extruded profile 2 are arranged downstream of the extrusion port 4. As also shown in Figure 1, the temperature measuring device 1 includes a thermometer 10, a lifting means 20, a lateral moving means 30, a rotating means 40, and a control device that controls the operation of each part.

[0015] The thermometer 10 measures the surface temperature of the extruded profile 2, and for example, a radiation thermometer is used. A radiation thermometer is a non-contact thermometer that measures temperature and is equipped with an algorithm for aluminum extrusion. The radiation thermometer measures the temperature by detecting infrared radiation emitted by the extruded profile 2 with a lens 12 (temperature measuring part) provided at the end of a fiber cable 11 extending from a main body (not shown). With a radiation thermometer, the temperature can be measured continuously without damaging the extruded profile 2.

[0016] As shown in Figures 1 to 3, the lifting mechanism 20 is a device for raising and lowering the lens 12, which is a temperature measuring unit, and comprises a shaft member 21 and a support member 22. The shaft member 21 is configured with a ball screw 23 that extends in the vertical direction and moves up and down between the lower end position shown by the solid line in Figure 3 and the upper end position shown by the dashed line. A lateral movement mechanism 30 is attached to the lower end of the shaft member 21. The support member 22 is a part that supports the shaft member 21 so that it can move up and down, and is provided with a through hole 24 through which the shaft member 21 passes. The support member 22 also includes a bearing member (not shown) that rotatably supports the shaft member 21. The bearing member raises and lowers the shaft member 21 by rotating the ball screw 23 and stops the rotation at a predetermined height to adjust the position. The bearing member is connected to a control device (not shown) and operates according to the signal of the control device. The height position of the shaft member 21 is predetermined according to the shape of the extruded profile 2 to be molded, and the shaft member 21 is raised or lowered to a predetermined height position according to the shape of the extruded profile 2 input to the control device.

[0017] The lateral movement means 30 is a device for laterally moving the lens 12, which is a temperature measuring unit, along the width direction of the extruded profile 2, and comprises a beam member 31 and a moving member 32. The beam member 31 is a member that extends in the width direction of the extruded profile 2 and is attached to the lower end of the shaft member 21 of the lifting means 20. The length dimension of the beam member 31 is greater than the width dimension of the extruded profile 2. The moving member 32 is a member that moves along the beam member 31 and is movable along a guide member (not shown) provided along the longitudinal direction of the beam member 31. The moving member 32 moves laterally between the right end position shown by the solid line in Figure 3 and the left end position shown by the dashed line. The moving member 32 moves along the guide member by a driving means (not shown). The driving means is connected to a control device (not shown) and operates in accordance with the signal of the control device. The installation position of the movable member 32 (a position corresponding to the width direction of the extruded profile 2) is set in advance according to the shape of the extruded profile 2 to be molded, and the movable member 32 is moved laterally to the predetermined installation position according to the shape of the extruded profile 2 input to the control device.

[0018] The rotating mechanism 40 is a device that rotates the lens 12, which is the temperature measuring part, to change its orientation, and is attached to the moving member 32 of the lateral moving mechanism 30. The rotating mechanism 40 includes a rotating member 41. The rotating member 41 includes a rotating arm 43 that supports the lens 12 and a motor 44 that rotates the rotating arm 43. The lens 12 is fixed to the tip of the rotating arm 43. The lens 12 is positioned along the axial direction of the rotating arm 43, facing away from the tip. The motor 44 is positioned so that the rotating shaft 45 extends in the extrusion direction of the extruded profile 2. The base end of the rotating arm 43 is fixed to the rotating shaft 45, and when the rotating shaft 45 rotates, the rotating arm 43 rotates around the base end, and the orientation (angle of emission) of the lens 12 is adjusted. The angle of emission of the lens 12 is set to 60° to 90° with respect to the surface of the extruded profile 2 whose temperature is to be measured, and 90° is most preferable. Motor 44 is connected to a control device (not shown) and operates in response to signals from the control device. The beam angle of lens 12 is preset according to the shape of the extruded profile 2 being molded, and according to the shape of the extruded profile 2 input to the control device, motor 44 rotates to tilt lens 12 at the desired beam angle.

[0019] The temperature measurement device 1 further comprises an outer edge monitoring means 50 and a distance measurement means 60. The outer edge monitoring means 50 monitors the shape of the outer edge of the extruded profile 2 extruded from the extruder 3. The outer edge monitoring means 50 can detect meandering of the extruded profile 2 in the lateral direction by continuously monitoring the shape of the outer edge of the extruded profile 2. The outer edge monitoring means 50 comprises a backlight 51, a camera 52, and an image processing device (not shown). The backlight 51 is an illumination device that illuminates the extruded profile 2 from below, and is disposed below the extruded profile 2 between the extrusion port 4 of the extruder 3 and the lens 12. The backlight 51 comprises an LED illumination unit 51a and a leg portion 51b that supports the illumination unit 51a. The illumination unit 51a extends in the width direction of the extruded profile 2, and has a longitudinal dimension larger than the width dimension of the extruded profile 2. Both end portions of the illumination unit 51a each extend outward beyond the outer edge of the extruded profile 2. The leg portion 51b has a height that positions the illumination unit 51a at a height close to the lower surface of the extruded profile 2.

[0020] The cameras 52 capture the shadow of the extruded profile 2 formed by the backlight 51, and are respectively disposed above the backlight 51 and above both end portions in the width direction of the extruded profile 2. The camera 52 is fixed to a base portion 55 attached to the lower surface of the support portion 22 of the lifting means 20. The base portion 55 is formed of a plate material extending in the width direction of the extruded profile 2, and the camera 52 is attached to the back surface of the base portion 55 (the surface on the extruder 3 side). The camera 52 is attached so as to be movable along the extending direction of the base portion 55. In other words, the camera 52 is attached to the base portion 55 by a lateral movement means (not shown) provided on the base portion 55, and is configured to move relative to the base portion 55.

[0021] The image processing device detects deformation of the outer edge of the extruded profile 2 from an image captured by the camera 52. Specifically, the image processing device detects a brightness boundary formed by the shadow of the illumination unit 51a and the extruded profile 2 from the shading of the image captured by the camera 52. When the boundary does not shift, the image processing device determines that meandering of the extruded profile 2 has not occurred, and when the boundary fluctuates, it determines that meandering of the extruded profile 2 has occurred. The image processing device is connected to a control device not shown in the drawings. When meandering of the extruded profile 2 occurs, the image processing device transmits a signal indicating that meandering of the extruded profile 2 has occurred to the control device, together with the direction and dimension of the boundary shift. The control device that has received the signal transmits a signal to the lateral movement means 30, and causes the moving member 32 to move in the lateral direction following the meandering of the extruded profile 2. Accordingly, the lens 12 is always positioned to point at a fixed position of the extruded profile 2, and the accuracy of temperature measurement is improved.

[0022] The distance measurement means 60 measures the height position of the extruded profile 2 extruded from the extruder 3, and is disposed above the extruded profile 2. The distance measurement means 60 measures the height position of the extruded profile 2 by measuring the distance between the measuring instrument and the upper surface of the extruded profile 2. The distance measurement means 60 is configured of a laser sensor, and is disposed downward above the extruded profile 2. The distance measurement means 60 is attached via a bracket 62 to a guide rail 61 extending in the longitudinal direction of the base portion 55. The distance measurement means 60 is provided movably along the guide rail 61. The distance measurement means 60 is connected to a control device not shown in the drawings. When vertical meandering of the extruded profile 2 occurs, the distance measurement means 60 detects a change in the distance between the measuring instrument and the upper surface of the extruded profile 2, and transmits a signal indicating that vertical meandering of the extruded profile 2 has occurred to the control device, together with the increase / decrease of the distance and the dimension of the change. The control device that has received the signal transmits a signal to the lifting means 20, and causes the shaft member 21 to lift and lower following the vertical meandering of the extruded profile 2. Accordingly, the lens 12 is always positioned to point at a fixed position of the extruded profile 2, and the accuracy of temperature measurement is improved.

[0023] The following describes the operation and effects of the temperature measuring device 1 of this embodiment. With this temperature measuring device 1, the lens 12, which is the temperature measuring part, can be raised and lowered, moved laterally and rotated according to the shape of the extruded profile 2, so that the temperature measuring part can be brought close to the measurement position of the extruded profile 2 at a right angle. Therefore, the surface temperature of extruded profiles 2 of various shapes can be accurately measured. In particular, with the temperature measuring device 1 of this embodiment, the operation of raising and lowering, moving laterally and rotating the lens 12 can be performed easily and accurately.

[0024] Furthermore, by inputting the shape of the extruded profile 2 into the control device, the shaft member 21 is raised and lowered to a predetermined height, the movable member 32 is moved laterally to a predetermined installation position, and the rotating arm 43 is tilted at a desired angle. This allows the temperature measuring unit (lens 12) to be easily and accurately positioned at a right angle to the measurement position of the extruded profile 2.

[0025] While embodiments of the present invention have been described above, the design can be modified as appropriate without violating the spirit of the invention. For example, in the above embodiment, the thermometer 10 is configured as a radiation thermometer, but it is not limited thereto. Any other thermometer that can measure temperature without contact may be used.

[0026] Furthermore, the configurations of the lifting means 20, the lateral movement means 30, and the rotation means 40 are not limited to those of the above embodiment. Moreover, the configurations of the outer edge monitoring means 50 and the distance measuring means 60 are not limited to those of the above embodiment. [Explanation of Symbols]

[0027] 1. Temperature measuring device for extruded profiles 2 Extruded profiles 3. Extruder 12. Lens (temperature measuring section) 20 Lifting and lowering means 21 Shaft material 22 Support part 30 Lateral movement means 31 Beam material 32 Moving member 40 Rotation means 41 Rotating parts 50 Outer edge monitoring means 51 Backlight 52 Cameras 60 Distance measurement means

Claims

1. A temperature measuring device for extruded profiles, comprising a temperature measuring unit for measuring the surface temperature of an extruded profile extruded from an extruder performing extrusion molding, A lifting mechanism for raising and lowering the temperature measuring unit, A lateral movement means for moving the temperature measuring unit in the width direction of the extruded profile, The system includes a rotating means for moving the orientation of the temperature measuring unit. A temperature measuring device for extruded profiles, characterized by the following features.

2. The lifting mechanism comprises a shaft member equipped with a ball screw and a support member that raises and lowers the shaft member to adjust its position. The lateral movement means comprises a beam member provided at the lower end of the shaft member and extending in the width direction of the extruded profile, and a moving member that moves along the beam member. The aforementioned rotating means includes a rotating member that is rotatably mounted on the movable member. The temperature measuring device for extruded profiles according to feature 1.

3. The system further includes an outer edge monitoring means for monitoring the shape of the outer edge of the extruded profile extruded from the extruder. The temperature measuring device for extruded profiles according to feature 1.

4. The outer edge monitoring means includes a backlight provided below the extruded profile, a camera that captures the shadow of the outer edge of the extruded profile generated by the backlight, and an image processing device that detects deformation of the outer edge of the extruded profile from the image captured by the camera. The temperature measuring device for extruded profiles according to feature 3.

5. The system further includes a distance measuring means provided above the extruded profile that has been pushed out of the extruder, for non-contact measurement of the height position of the extruded profile. The temperature measuring device for extruded profiles according to feature 1.

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