Wire Width Measuring Device

Abstract

The present invention relates to a welding wire width measuring device, which comprises four parts, namely a base, a limit device, a width measuring device, and a sensor device. The limit device is used to limit the welding rod passed in to keep it straight, the width measuring device measures the welding rod width, and the sensor device reads the welding rod width data. The present invention achieves the effect of measuring the thickness of the produced welding rod by real-time measuring the width of the welding wire in the production process. At the same time, the equipment for producing welding wire can be adjusted in time through feedback regulation, so that the thickness of the produced welding rod meets the production standards, while reducing the scrap rate and material loss. The measurement accuracy of the present invention can reach ±40μm.

Description

Technical Field

[0001] The invention relates to a welding wire width measuring device Background Art

[0002] When the era entered the era of mechanized production, for welding technology, in order to increase welding output, the use of automated welding equipment has a problem, that is, if the thickness of the welding rod is uneven, it will have a significant impact on the welding effect. Therefore, in order to avoid this situation and to adapt to the export welding wire standards, it is necessary to produce welding wire that meets the standards.

[0003] In the production process of brazing, the initial welding wire needs to be heated, drawn, flattened, marked and subsequently cleaned to obtain the final brazing. However, in the production process, the flattening machine will produce deformation that is difficult to detect with the naked eye as the use time increases, which will cause the pressed brazing to fail to meet the standards. At the same time, due to the marking process in the existing production line process, the mark on the brazing has an impact on the direct thickness measurement.

[0004] At present, the detection of welding wire standards is still based on manual sampling detection. This method cannot guarantee that every package of welding wire produced meets the standards. At the same time, manual detection has the disadvantages of being time-consuming, labor-intensive, and having large errors.

[0005] Therefore, it is necessary to design a continuous and high-precision welding wire width measuring device to solve the problems of large errors in the above-mentioned manual detection and the inability to ensure that each section of welding wire meets the standard. Summary of the invention

[0006] The object of the present invention is to provide a welding wire width measuring device.

[0007] To achieve the aforementioned objectives, the present invention adopts the following technical solutions: a welding wire width measuring device, comprising a width measuring device and a sensing device, wherein the width measuring device comprises a flange bearing, a bearing probe, a connecting shaft and a third flexible spring, wherein the side surfaces of the flange bearing and the bearing probe respectively press against two sides of the welding rod to be measured, the connecting shaft is connected to the bearing probe and extends to one side, the third flexible spring is sleeved on the connecting shaft and provides thrust to the side where the bearing probe is located so that the bearing probe presses against the welding rod to be measured, the sensing device comprises a sensing probe, and the sensing probe presses against the tail of one side of the extending connecting shaft. During measurement, the welding rod to be measured moves along the length direction, so that the width of the welding rod to be measured at different positions is transmitted to the sensor probe by the bearing probe through the connecting shaft.

[0008] As a further improvement of the present invention, the welding wire width measuring device also includes a limiting device, which includes a front limiting device and a rear limiting device placed at symmetrical positions in front and behind the width measuring device. The welding rod to be measured passes through the front limiting device, enters the width measuring device, and is pulled out from the rear limiting device, so that the welding rod to be measured is limited by the front limiting device and the rear limiting device in the width and thickness directions.

[0009] As a further improvement of the present invention, the front limit device and the rear limit device have the same structure, and the front longitudinal limit device includes: a first flexible spring, an H-groove bearing and a first bearing. The first bearing is installed directly above the H-groove bearing and the two are matched with each other. The first bearing can move up and down relative to the H-groove bearing. The first flexible spring is installed at both ends of the first bearing to provide pressure pointing to the H-groove axis. The welding rod passes through the H-groove of the H-groove bearings of the front limit device and the rear limit device to form a welding rod channel, and the welding rod channel is perpendicular to the plane formed by the first bearing and the axis of the H-groove bearing.

[0010] As a further improvement of the present invention, the flange bearing axis position is fixed, the flange bearing moves up and down along the axis direction, and a convex portion is provided on the top of the flange bearing, and the convex portion clamps the upper surface of the welding rod. As a further improvement of the present invention, the width measuring device also includes a thrust ball bearing and a second flexible spring. The thrust ball bearing is above the flange bearing, and the axes of the two are aligned. The second flexible spring provides pressure along the axis direction of the thrust ball bearing above the thrust ball bearing to make the thrust ball bearing fit with the flange bearing. As a further improvement of the present invention, the width measuring device also includes a shaft retaining ring, a groove is milled on the connecting shaft to install the shaft retaining ring, and one end of the third flexible spring is against the shaft retaining ring and sleeved on the connecting shaft. Since the temperature of the newly pressed welding rod is high and its texture is soft, in order to prevent the welding rod from being deformed by passing through this device, all flexible springs only provide weak pressure, and the specific pressure range is adjusted according to the actual production situation.

[0011] As a further improvement of the present invention, the connecting shaft is fixed with two positioning holes, the axis of the connecting shaft is perpendicular to the welding rod, and the connecting shaft moves along the axis direction of the connecting shaft.

[0012] As a further improvement of the present invention, a lubricating device is installed in the positioning hole, and the lubricating device is a graphite bushing.

[0013] As a further improvement of the present invention, a section is milled at the tail of the connecting shaft, and fixing devices are installed on both sides of the section; the fixing device is a bearing, and the bearing fits tightly with the section at the tail of the connecting shaft; the connecting shaft should have a considerable length to prevent the temperature conduction of the welding rod from affecting the sensor.

[0014] As a further improvement of the present invention, the sensor is a micrometer.

[0015] The present invention measures the thickness of the welding rod produced by real-time measurement of the width of the welding wire in the production process. At the same time, the equipment for producing the welding wire can be adjusted in time through feedback regulation, so that the thickness of the welding rod produced meets the production standard, while reducing the scrap rate and material loss. The measurement accuracy of the present invention can reach ±40μm. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural diagram of a welding wire width measuring device in a specific implementation manner of the present invention.

[0017] Figure 2 for Figure 1 A partial enlarged view.

[0018] Figure 3 for Figure 1 A partial enlarged view of the middle width measuring device. DETAILED DESCRIPTION

[0019] like Figure 1 As shown, a welding wire width measuring device 100 includes a base 10, a limit device 20, a width measuring device 30, and a sensor device 40. The base 10 is used to provide a stable horizontal surface suitable for the height of the production line to install the remaining parts of the welding wire width measuring device. The limit device 20 is fixed on the vertical plane provided by the side surface of the base to limit the welding rod so that the welding rod channel is parallel to the horizontal plane provided by the base 10. The width measuring device 30 and the sensor device 40 are fixedly installed on the horizontal plane provided by the base 10. The width measuring device 30 is used to measure the width of the welding wire passing in real time and provide sufficient sampling data for the measurement of the welding wire width. The sensor device 40 is used to convert the measured welding wire width into data and upload it for processing.

[0020] like Figure 1 As shown, the base 10 includes a bottom plate 11, an L-shaped steel frame 12, and a wedge-shaped support block 13, wherein the L-shaped steel frame 12 includes a vertical portion and a horizontal portion, the vertical portion is arranged on the bottom plate 11, and its side is used to fix and install the limit device 20, and the horizontal portion is used to install the width measuring device 30 and the sensor device 40. Considering the stability of the overall welding wire width measuring device, the L-shaped steel frame 12 should be installed in the middle part of the bottom plate 11. The wedge-shaped support block 13 is arranged at the bend of the L-shaped steel frame 12 to improve the supporting force of the horizontal portion.

[0021] like Figure 2 As shown, the limiting device includes a V-shaped workpiece 21, a front longitudinal limiting device 22, and a rear longitudinal limiting device 23.

[0022] The V-shaped workpiece 21 is installed on the side of the L-shaped steel frame to carry the front and rear limit devices, and the top of both sides is an inverted structure to facilitate the assembly of other parts. Figure 2 As shown, the front longitudinal limit device includes two first flexible springs 24, an H-groove bearing 25, a first bearing 26, and the rear longitudinal limit device 23 is completely consistent with the front longitudinal limit device. The front and rear longitudinal limit devices are respectively installed at both ends of the V-shaped workpiece.

[0023] The front longitudinal limit device 22 is installed on one side of the V-shaped workpiece 21, and an H-groove bearing 25 is fixedly installed on this side of the V-shaped workpiece 21, wherein the H-groove width of the H-groove bearing 25 is slightly wider than the width of the welding rod to be measured to ensure that the welding rod can be placed in the H-groove.

[0024] Two grooves are milled in the top inverted structure of the V-shaped workpiece 21 for accommodating the first bearing 26. The first bearing 26 is installed above the H-groove bearing 25 by two flexible springs 24 perpendicular to the axis of the H-groove bearing 25 to apply weak pressure, so that the first bearing 26 and the H-groove bearing 25 fit each other. In order for the first bearing 26 to meet the conditions of fitting with the H-groove bearing 25, the width of the first bearing 26 should be slightly smaller than the width of the H-groove, so that it can be embedded with the H-groove bearing 25, but the width cannot be too small to prevent the welding rod from getting stuck in the gap between the first bearing and the H-groove bearing. At the same time, the groove depth of the H-groove bearing should match the first bearing to avoid the situation where the first bearing is suspended in the air and cannot contact the welding rod, resulting in the device failing to play a limiting role.

[0025] The first bearing 26 can only move up and down due to the groove milled on the V-shaped workpiece 21, which is convenient for workers to feed the welding rod into the present invention. In order to prevent the first bearing 26 from jumping up and down during the work of the present invention, it is preferred to install a first flexible spring 24 in the groove, and use the first flexible spring 24 to apply pressure. Since the welding rod just produced is still in a relatively high temperature state and its texture is relatively soft, in order to avoid deformation of the welding rod when passing through the present invention, the preferred first flexible spring 24 can only produce a weak pressure. The specific pressure should be selected according to actual production needs, so that the front longitudinal limit device can meet the limiting function while not causing the welding rod to deform due to excessive pressure. The other side of the V-shaped workpiece 21 is the rear longitudinal limit device 23, which is completely consistent with the front longitudinal limit device 22. The welding rod passes through the H grooves of the front and rear longitudinal limit devices to form a welding rod channel. The rear longitudinal limiter 23 is mirror-symmetrical to the front longitudinal limiter 22, that is, the two sides of the V-shaped workpiece 21 are completely consistent, which can ensure that the H-groove welding rod passages of the front and rear devices are parallel to the base plane. In order to prevent the middle part of the welding rod passing through the device from being bent due to the force applied by the front and rear longitudinal limiters at both ends, it is preferred to ensure that the planes formed by the axes of the first bearings 26 and the axes of the H-groove bearings 25 on both sides of the V-shaped workpiece are parallel to each other, that is, the axis line connecting the first bearing 26 and the H-groove bearing 25 is perpendicular to the welding rod passage.

[0026] like Figure 2 As shown, a width measuring device 30 is installed at the middle part of the V-shaped workpiece. The width measuring device 30 is characterized in that it includes: a flange bearing 31, a thrust ball bearing 32, a second flexible spring 33, a bearing probe 34, a connecting shaft 35, a shaft retaining ring 36, a third flexible spring 37, a graphite bushing 38, and a bearing 39. The installation height of the width measuring device 30 relative to the horizontal plane of the base is consistent with the relative height of the welding rod channel.

[0027] like Figure 3As shown, the axis of the flange bearing 31 is positioned near the welding rod channel, so that the side surface of the flange bearing 31 is close to the side of the welding rod. The thrust ball bearing 32 is above the flange bearing 31, and the axes of the two are aligned. The flange bearing 31 can move up and down along the axis direction to facilitate the feeding of the welding wire. A convex part is provided on the top of the flange bearing 31, which is specifically manifested as the flange bearing 31 being approximately T-shaped. When working, the convex part of the flange bearing 31 is stuck on the upper surface of the welding rod, thereby playing a limiting role again, wherein the convex part will not be too protruding to avoid completely covering the welding rod. If the welding rod is located too deep, it will affect the contact between the bearing probe 34 and the welding rod. The second flexible spring 33 provides pressure along the axis direction of the thrust ball bearing above the thrust ball bearing 32 to make the thrust ball bearing 32 fit with the flange bearing 31, so as to prevent the flange bearing 31 from jumping up and down when the device is working. At the same time, in order to prevent the pressure from deforming the welding rod, the second flexible spring 33 only applies weak pressure. A thrust ball bearing 32 is provided between the second flexible spring 33 and the flange bearing 31 , and its function is to reduce the loss of the flange bearing 31 during operation.

[0028] The probe of the width measuring device is a bearing probe 34 matched with the flange bearing, such as Figure 2 The diameter of the bearing probe 34 is moderate to ensure that the device for fixing the bearing probe 34 will not contact the flange bearing 31. The thickness of the bearing probe 34 is less than the length of the flange bearing 31 but should be much greater than the thickness of the welding rod. Two convex steel blocks are fixed on the horizontal upper surface of the base, and positioning holes are drilled on the steel blocks. The connecting shaft 35 of the probe passes through the positioning holes fixed on the upper surface of the base and is connected to the probe 34. The position selection of the positioning hole will affect the position of the bearing probe 34 and the angle of the connecting shaft 35 relative to the welding rod channel. Therefore, the position of the bearing probe 34 can be adjusted to the height within the middle area of ​​the width of the welding rod channel through the bearing probe 34. The positioning hole is opened at the place where the axis of the connecting shaft 35 intersects the welding rod channel and the axis of the flange bearing 31 perpendicularly. Preferably, a graphite bushing 38 is installed in the positioning hole to reduce resistance. A groove is milled on the shaft located between the two positioning holes and a shaft retaining ring 36 is installed, and a third flexible spring 37 is sleeved on the shaft. The third flexible spring 37 should have a certain initial deformation to ensure that the bearing probe 34 can resist the welding rod, so that the two sides of the welding rod are respectively fitted with the flange bearing 31 and the bearing probe 34. At the same time, in order to avoid the pressure from deforming the welding rod, the third flexible spring 37 only applies a weak pressure.

[0029] like Figure 1As shown, the tail of the connecting shaft 35 is milled with a section, and bearings 39 are fixedly installed on both sides to ensure that the connecting shaft 35 can only move forward and backward but not rotate, thereby preventing the bearing probe 34 from deflecting around the axis and entering the welding rod to cut and wear the probe 34. At the same time, since the connecting shaft 35 will generate a force in the direction of the axis when the device is working, and due to the existence of the section, there is pressure between the firmware in contact with the section of the connecting shaft 35, which will increase the friction between the connecting shaft and the firmware, thereby affecting the measurement accuracy. The preferred use of bearings 39 as a fixing device can weaken the influence of friction on the measurement accuracy, and meet the requirements of fixing the connecting shaft 35 so that it will not deflect around the axis and will not affect its forward and backward movement. The preferred connecting shaft 35 should have a considerable length, and the temperature of the welding rod after the temperature of the connecting shaft is conducted through the connecting shaft, the temperature of the tail of the connecting shaft 35 is in a lower temperature range, so that it will not affect the sensor.

[0030] like Figure 1 As shown, the sensing device 40 includes a sensor 41 and a sensor probe 42. The sensor probe 42 contacts the tail of the connecting shaft 35. The sensor 41 is installed on the base to measure the displacement of the connecting shaft 35 and transmit the data to the PLC for width and thickness conversion. The preferred sensor 41 is a capacitive micrometer, which has high measurement accuracy and small error, and can meet the requirements of the actual production application of the present invention.

[0031] Although the preferred embodiments of the present invention have been disclosed for illustrative purposes, those skilled in the art will appreciate that various modifications, additions and substitutions are possible, without departing from the scope and spirit of the invention as disclosed in the accompanying claims.

Claims

1. A welding wire width measuring device, characterized in that: It comprises a width measuring device and a sensing device, wherein the width measuring device comprises a flange bearing, a bearing probe, a connecting shaft and a third flexible spring, wherein the side surface of the flange bearing and the bearing probe respectively press against two sides of the welding rod to be measured, the connecting shaft is connected to the bearing probe and extends to one side, the third flexible spring is sleeved on the connecting shaft and provides thrust to the side where the bearing probe is located so that the bearing probe presses against the welding rod to be measured, the sensing device comprises a sensor probe, and the sensor probe presses against the tail of one side of the extending connecting shaft, and during measurement, the welding rod to be measured moves along the length direction so that the width of the welding rod to be measured at different positions is transmitted to the sensor probe by the bearing probe through the connecting shaft; It also includes a limiting device, which includes a front limiting device and a rear limiting device placed at symmetrical positions in front and behind the width measuring device. The welding rod to be measured passes through the front limiting device and enters the width measuring device and is pulled out from the rear limiting device, so that the welding rod to be measured is limited by the front limiting device and the rear limiting device in the width and thickness directions; The front limit device and the rear limit device have the same structure, the front limit device comprises: a first flexible spring, an H-groove bearing and a first bearing, the first bearing is installed just above the H-groove bearing and the two are matched with each other, the first bearing can move up and down relative to the H-groove bearing, the first flexible spring is installed at both ends of the first bearing to provide pressure pointing to the H-groove axis, the welding rod passes through the H-groove of the H-groove bearing of the front limit device and the rear limit device to form a welding rod channel, and the welding rod channel is perpendicular to the plane formed by the first bearing and the axis of the H-groove bearing; The width measuring device also includes a thrust ball bearing and a second flexible spring. The thrust ball bearing is above the flange bearing, and the axes of the two are aligned. The second flexible spring provides pressure along the axis direction of the thrust ball bearing above the thrust ball bearing to make the thrust ball bearing fit with the flange bearing. The width measuring device also includes a shaft retaining ring. A groove is milled on the connecting shaft to install the shaft retaining ring. One end of the third flexible spring is against the shaft retaining ring and is sleeved on the connecting shaft.

2. The welding wire width measuring device according to claim 1, characterized in that: The flange bearing has a fixed axial position, and the flange bearing moves up and down along the axial direction. A convex portion is provided on the top of the flange bearing, and the convex portion clamps the upper surface of the welding rod.

3. The welding wire width measuring device according to claim 1, characterized in that: The connecting shaft is fixed with two positioning holes, the axis of the connecting shaft is perpendicular to the welding rod, and the connecting shaft moves along the axis direction of the connecting shaft.

4. The welding wire width measuring device according to claim 3, characterized in that: A lubricating device is installed in the positioning hole, and the lubricating device is a graphite bushing.

5. The welding wire width measuring device according to claim 1, characterized in that: A section is milled out at the tail of the connecting shaft, and fixing devices are installed on both sides of the section; the fixing device is a bearing, and the bearing is tightly fitted with the section at the tail of the connecting shaft.

6. The welding wire width measuring device according to claim 1, characterized in that: The sensor is a micrometer.

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