Dynamic wire width measuring device

Abstract

The present invention relates to a dynamic welding wire width measuring device, which includes three parts, namely, a limiting device, a width measuring unit, and a clamping mechanism. The limiting device includes a front limiting rough straightening device and a rear limiting rough straightening device. The limiting device is used to limit the welding wire to be measured so that it remains straight in the width direction. The width measuring unit is composed of a first width measuring structure and a second width measuring structure. The first width measuring structure and the second width measuring structure are located on both sides of the welding wire to be measured and measure the welding wire width at the same time. The clamping mechanism is used to press the welding wire to be measured so that it remains straight in the horizontal direction. The present invention uses two sets of width measuring structures to measure the welding wire width at the same time, thereby avoiding the situation where the welding wire is bent to one side and the other side is suspended in the air, causing measurement errors, and improving the measurement accuracy.

Description

Technical Field

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

[0002] When the era entered the mechanized production era, 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 wire 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] To this end, the applicant has proposed a device that can automatically measure the width of welding wire in another patent. The welding wire width measuring device solves the problem of low efficiency and large error of manual detection. However, in the width measuring device, when the welding wire enters the measuring device, only a limit mechanism is provided in the longitudinal direction of the welding wire. During the production process, the welding wire will encounter stress when it is extruded from the copper ingot, so it often forms a large bend in the width direction (i.e., the transverse direction). This transverse bend causes uneven force in the transverse direction when the welding wire enters the above-mentioned side frame device, thereby causing the sensor for measuring the width to be unable to measure accurately.

[0006] 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 inability to ensure that each section of welding wire meets the standard, and inability to accurately measure when the welding wire is bent in the width direction. Summary of the invention

[0007] The object of the present invention is to provide a dynamic welding wire width measuring device.

[0008] To achieve the aforementioned objectives, the present invention adopts the following technical solutions: a dynamic welding wire width measuring device, comprising a width measuring unit, the width measuring unit comprising a first width measuring structure and a second width measuring structure, the first width measuring structure and the second width measuring structure are symmetrically arranged on both sides of the welding wire to be measured, the first width measuring structure and the second width measuring structure each comprising a bearing probe, a connecting shaft, a flexible spring and a sensing device, wherein each of the bearing probes respectively abuts against one side of the welding wire to be measured, the connecting shaft is connected to the bearing probe and extends to a side away from the welding wire to be measured, the 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 abuts against the welding wire to be measured, the sensing device comprises a sensing probe, the sensing probe abuts against the tail of the extended side of the connecting shaft, during measurement, the welding wire to be measured moves along the length direction, so that the width of the welding wire to be measured at different positions is transmitted to the sensor probe by the bearing probe through the connecting shaft.

[0009] As a further improvement of the present invention, the dynamic welding wire width measuring device also includes a limiting device, which includes a front limiting coarse straightening device and a rear limiting coarse straightening device placed at symmetrical positions before and after the width measuring unit. The welding wire to be measured passes through the front limiting coarse straightening device, enters the width measuring unit, and is pulled out from the rear limiting coarse straightening device, so that the welding wire to be measured is limited by the front limiting coarse straightening device and the rear limiting coarse straightening device in the width and thickness directions.

[0010] As a further improvement of the present invention, the front limit rough straightening device and the rear limit rough straightening device have the same structure, and the front limit rough straightening device comprises: a plurality of groups of H-groove bearings, and the H-groove bearings are arranged in a left-right staggered manner on the same horizontal plane around a horizontal straight line in space, and the spatial straight line serves as a welding wire channel, and the welding wire channel of the rear limit rough straightening device is on the same straight line as the welding wire channel of the front limit rough straightening device.

[0011] As a further improvement of the present invention, the dynamic welding wire width measuring device also includes a clamping mechanism, which includes a plurality of needle roller bearing rows, a concave steel block, a screw, a first needle roller bearing row connecting piece, and a second needle roller bearing row connecting piece. Since the function of the clamping mechanism is to keep the welding wire to be measured straight in the longitudinal direction, in this embodiment, there should be two pairs of front and rear needle roller bearing rows, totaling four needle roller bearing rows; the first needle roller bearing row and the second needle roller bearing row are respectively fixedly mounted on the protrusions at both ends of the concave steel block, and after the first needle roller bearing row connecting piece is fixed to the third needle roller bearing row, it is connected to the protrusion on one side of the concave steel block by screws, so that the third needle roller bearing row is installed directly above the first needle roller bearing row and the gap between the two is smaller than the thickness of the welding wire to be measured, and after the second needle roller bearing row connecting piece is fixed to the fourth needle roller bearing row, it is connected to the protrusion on the other side of the concave steel block by screws, so that the fourth needle roller bearing row is installed directly above the second needle roller bearing row and the gap between the two is smaller than the thickness of the welding wire to be measured.

[0012] As a further improvement of the present invention, the clamping mechanism also includes a spring, the length of the screw in the clamping mechanism is greater than the thickness of the first and second needle bearing row connecting parts, and the spring sleeve applies downward pressure on each screw so that the first and second needle bearing row connecting parts will not jump up and down during operation.

[0013] 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 wire, and the connecting shaft moves along the axis direction of the connecting shaft.

[0014] 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.

[0015] As a further improvement of the present invention, the width measuring unit further comprises a shaft retaining ring, a groove is milled on the connecting shaft for installing the shaft retaining ring, and one end of the flexible spring presses against the shaft retaining ring and is sleeved on the connecting shaft.

[0016] 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 wire from affecting the sensor.

[0017] As a further improvement of the present invention, the sensor is a micrometer.

[0018] The present invention performs preliminary straightening of the welding wire to be measured by a limiting device, and simultaneously measures the welding wire with two sets of left and right width measuring structures, further avoiding measurement errors caused by the welding wire being unable to contact the other side when the welding wire bends to one side.

[0019] The present invention measures the thickness of the produced welding wire in real time by measuring 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 produced welding wire 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

[0020] Figure 1 It is a structural diagram of a dynamic welding wire width measuring device in a specific implementation manner of the present invention.

[0021] Figure 2 It is a position limiting rough straightening device in a dynamic welding wire width measuring device.

[0022] Figure 3 It is the clamping mechanism in the dynamic welding wire width measuring device.

[0023] Figure 4 It is the width measuring unit in the dynamic welding wire width measuring device.

[0024] Figure 5 This is a partial enlargement of the width measuring unit in the dynamic welding wire width measuring device 1. DETAILED DESCRIPTION

[0025] like Figure 1 As shown, a dynamic welding wire width measuring device comprises a limiting device 10, a width measuring unit 30, and a clamping mechanism 20. The width measuring unit 30 is used to measure the width of the welding wire to be measured. The limiting device 10 comprises a front limiting coarse straightening device and a rear limiting coarse straightening device. The width measuring unit 30 consists of a first width measuring structure and a second width measuring structure. The clamping mechanism 20 is located between the front limiting coarse straightening device and the rear limiting coarse straightening device. The welding wire to be measured passes through the present invention in the order of the front limiting coarse straightening device, the clamping mechanism, and the rear limiting coarse straightening device. The width measuring unit 30 measures the width of the welding wire to be measured at the clamping mechanism 20.

[0026] like Figure 2 As shown, the limit device 10 includes a front limit rough straightening device and a rear limit rough straightening device, and the front limit rough straightening device and the rear limit rough straightening device are completely identical. The front limit rough straightening device includes: a front limit rough straightening device base 14, an eccentric shaft 13, a plurality of H-slot bearings, a plurality of H-slot bearing fixing seats, and a plurality of buffer springs. Considering that the H-slot bearings play a role in rough straightening the welding wire to be tested in the device, as a more reasonable arrangement method, the H-slot bearings should be arranged in a staggered manner on both sides of the welding wire to be tested, so the number of H-slot bearings should be an odd number. In the specific implementation shown in the figure, the front limit rough straightening device uses 7 H-slot bearings, 3 H-slot bearing fixing seats, and 3 buffer springs, and each H-slot bearing is exactly the same, and each H-slot bearing fixing seat is exactly the same.

[0027] The front-limiting rough straightening device base 14 is an I-shaped structure, and a wedge-shaped support block 15 is provided under the cross beam of the upper half thereof to improve the stability of the overall device. The front-limiting rough straightening device base 14 is used to provide a stable horizontal surface for installing the remaining components of the front-limiting rough straightening device. As a specific implementation method, the upper surface of the front-limiting rough straightening device base described in the present invention is a rectangle, and H-groove bearings are staggeredly arranged around the symmetry axis in the length direction of the upper surface of the front-limiting rough straightening device base. The front-limiting rough straightening device described in the present invention adopts 7 H-groove bearings, with the symmetry axis as the dividing line, which is actually the welding wire channel of the welding wire to be tested. On one side of the dividing line, four groups of H-groove bearings are evenly fixedly installed on the upper surface of the front-limiting rough straightening device base along the dividing line, and the dividing line is close to the H-groove of the H-groove bearing. On the other side of the dividing line, the remaining three groups of H-groove bearings are respectively fixed on the 3 groups of H-groove bearing fixing seats, such as Figure 2 As shown, the first H-slot bearing 11 is fixed on the first H-slot bearing fixing seat 12. The first H-slot bearing fixing seat 12 is a rectangular parallelepiped, and its height is consistent with the thickness of the upper half of the crossbeam of the base of the front limit rough straightening device. Three grooves are milled inside the crossbeam to accommodate each H-slot bearing fixing seat. The position and depth of the grooves affect the position of the H-slot bearings, so the design condition of the grooves is: the H-slot bearings are staggered around the dividing line, and the dividing line is close to the H-slots of each H-slot bearing. A buffer spring is filled between the front end of the first H-groove bearing fixing seat 12 and the contact part of the base crossbeam of the front limit rough straightening device. The rear end of the first H-groove bearing fixing seat 12 has a raised handle, and a fixed eccentric shaft 13 is arranged in the extension direction of the handle. The handle of the first H-groove bearing fixing seat 12 is attached to the eccentric shaft. When the eccentric shaft is rotated, the first H-groove bearing fixing seat 12 can be compressed / relaxed due to the physical properties of the eccentric shaft itself, so that the width of the welding wire channel reserved between the H-groove bearings can be controlled. The assembly of the remaining H-groove bearing fixing seats is consistent with the first H-groove bearing fixing seat 12. The front limit rough straightening device and the rear limit rough straightening device are completely consistent and the welding wire channels of the two are aligned.

[0028] like Figure 3As shown, the clamping mechanism 20 includes: a plurality of needle bearing rows, a concave steel block 29, a spring 28, a screw 27, a first needle bearing row connector 25, and a second needle bearing row connector 26. Since the function of the clamping mechanism is to keep the welding wire to be tested straight in the longitudinal direction, in this embodiment, there should be two pairs of needle bearing rows, front and back, for a total of four needle bearing rows. The first needle bearing row 22 and the second needle bearing row 23 are fixedly installed on the raised parts at both ends of the concave steel block 29, respectively. The first needle bearing row connector 25 is fixedly connected to the third needle bearing row 21 and then connected to the raised part on one side of the concave steel block 29 through a screw. The length of the screw is greater than the thickness of the needle bearing row connector, so that the first needle bearing row connector 25 can move up and down relative to the concave steel block 29. The third needle bearing row 21 is located directly above the first needle bearing row 22, and the gap between the two is smaller than the thickness of the welding wire to be tested. The raised parts at both ends of the concave steel block 29 are symmetrical in structure. The second needle roller bearing row connecting piece 26 is fixedly connected to the fourth needle roller bearing row 24 and then connected to the concave steel block 29 through screws. The fourth needle roller bearing row 24 is located directly above the second needle roller bearing row 23; each screw 27 is sleeved with a spring 28 to press down the first needle roller bearing row connecting piece 25 and the second needle roller bearing row connecting piece 26 to ensure that the first and second needle roller bearing row connecting pieces do not jump during operation; the springs only provide weak pressure to ensure that the welding wire to be measured will not be deformed due to the pressure of the clamping mechanism 20; the width of the recessed part of the concave steel block 29 is greater than the diameter of the bearing probe in the width measuring unit 30.

[0029] like Figure 4 As shown, the width measuring unit 30 includes a first width measuring structure and a second width measuring structure, and the first width measuring structure and the second width measuring structure are completely consistent. The first width measuring structure includes a bearing probe 31, a connecting shaft 32, a shaft retaining ring 33, a flexible spring 34, a graphite bushing 35, a bearing 36 and a sensing device, the bearing probe abuts against one side of the welding wire to be measured, the connecting shaft is connected to the bearing probe and extends to one side, the flexible spring 34 is sleeved on the connecting shaft and provides thrust to the side where the bearing probe is located so that the bearing probe abuts against the welding wire to be measured, the sensing device includes a sensing probe, and the sensing probe abuts against the tail of one side of the extending connecting shaft. During measurement, the welding wire to be measured moves along the length direction, so that the width of the welding wire to be measured at different positions is transmitted to the sensor probe by the bearing probe through the connecting shaft;

[0030] like Figure 4The diameter of the bearing probe 31 is moderate to ensure that the device for fixing the bearing probe 31 in the first width measurement structure will not contact the device for fixing the bearing probe in the second width measurement structure, and the diameter of the bearing probe 31 is smaller than the length of the exposed part of the welding wire to be measured in the middle part of the clamping mechanism to avoid contact between the bearing probe 31 and the clamping mechanism. The thickness of the bearing probe 31 should be much larger than the thickness of the welding wire. Two convex-shaped steel blocks are fixed on the horizontal upper surface of the base, and positioning holes are drilled on the steel blocks. The connecting shaft 32 of the bearing probe 31 passes through the positioning holes of the steel blocks fixed on the upper surface of the base and is connected to the probe 31. The position selection of the positioning hole will affect the position of the bearing probe 31 and the angle of the connecting shaft 32 relative to the welding wire channel. Therefore, the position of the bearing probe 31 can be adjusted to the height within the range of the middle area of ​​the width of the bearing probe 31, and the positioning hole is opened at the place where the axis of the connecting shaft 32 intersects the welding wire channel vertically. Preferably, a graphite bushing 35 is installed in the positioning hole to reduce resistance. A groove is milled on the shaft between the two positioning holes to install a shaft retaining ring 33, and a flexible spring 34 is sleeved on the shaft. The flexible spring 34 should have a certain initial deformation to ensure that the bearing probe 31 can resist one side of the welding wire. At the same time, in order to avoid the pressure from deforming the welding wire, the flexible spring 34 only applies weak pressure.

[0031] like Figure 4 As shown, the tail of the connecting shaft 32 is milled with a section, and bearings 36 are fixedly installed on both sides to ensure that the connecting shaft 32 can only move forward and backward but not rotate, thereby preventing the bearing probe 31 from deflecting around the axis and entering the welding wire to cut and wear the probe 31. At the same time, since the connecting shaft 32 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 32, and this pressure will increase the friction between the connecting shaft and the firmware, thereby affecting the measurement accuracy. The preferred use of bearings 36 as a fixing device can weaken the influence of friction on the measurement accuracy, and meet the requirements of fixing the connecting shaft 32 so that it will not deflect around the axis and will not affect its forward and backward movement. The preferred connecting shaft 32 should have a considerable length, and the temperature of the tail of the connecting shaft 32 is in a lower temperature range after the temperature of the welding wire is conducted through the connecting shaft, so that it will not affect the sensor.

[0032] like Figure 4 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 32. The sensor 41 is installed on the base to measure the displacement of the connecting shaft 32 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.

[0033] like Figure 1As shown, the first width measurement structure is completely consistent with the second width measurement structure, and is distributed on both sides of the welding wire to be measured. Figure 5 As shown, the bearing probes of the first width measurement structure and the second width measurement structure are respectively against the two sides of the welding wire to be measured. This design improves the problem of inaccurate width measurement caused by the fact that one side of the width measurement device is fixed in the previous technology, and if the welding wire to be measured is completely arched to the other side, the welding wire to be measured does not contact the fixed side of the width measurement device, resulting in inaccurate width measurement. Figure 5 As shown, the width measuring unit 30 in the present invention adopts two sets of consistent width measuring structures. The bearing probes of the two sets of width measuring structures are retractable and movable. When the welding wire to be measured bends to one side, the bearing probe on the other side will extend accordingly to ensure that the bearing probe does not separate from the welding wire to be measured.

[0034] As a specific implementation, the sensor of the first width measurement structure measures the displacement ΔX of the bearing probe. 1 Similarly, the second width measurement structure measures data ΔX 2 , then the change in wire width is:

[0035] ΔX=ΔX 1 +ΔX 2 (1);

[0036] When ΔX>0, the welding wire becomes thinner, when ΔX<0, the welding wire becomes wider, and when ΔX=0, the welding wire width remains unchanged.

[0037] 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 dynamic welding wire width measuring device, characterized in that: The invention comprises a width measuring unit, wherein the width measuring unit comprises a first width measuring structure and a second width measuring structure, wherein the first width measuring structure and the second width measuring structure are symmetrically arranged on both sides of the welding wire to be measured, and each of the first width measuring structure and the second width measuring structure comprises a bearing probe, a connecting shaft, a flexible spring and a sensing device, wherein each of the bearing probes respectively abuts against one side of the welding wire to be measured, the connecting shaft is connected to the bearing probe and extends to a side away from the welding wire to be measured, the flexible spring is sleeved on the connecting shaft and provides a thrust to the side where the bearing probe is located so that the bearing probe abuts against the welding wire to be measured, and the sensing device comprises a sensing probe, wherein the sensing probe abuts against the tail of one side of the extending connecting shaft, and during measurement, the welding wire to be measured moves along the length direction so that the width of the welding wire to be measured at different positions is transmitted to the sensing probe by the bearing probe through the connecting shaft; The width measuring unit further comprises a shaft retaining ring, a groove is milled on the connecting shaft to install the shaft retaining ring, and one end of the flexible spring is pressed against the shaft retaining ring and sleeved on the connecting shaft; The clamping mechanism also includes a clamping mechanism, which includes a plurality of needle bearing rows, a concave steel block, a screw, a first needle bearing row connecting piece, and a second needle bearing row connecting piece. Since the function of the clamping mechanism is to keep the welding wire to be tested straight in the longitudinal direction, in this embodiment, there should be two pairs of front and rear needle bearing rows, totaling four needle bearing rows; the first needle bearing row and the second needle bearing row are respectively fixedly mounted on the protrusions at both ends of the concave steel block, and after the first needle bearing row connecting piece is fixed to the third needle bearing row, it is connected to the protrusion on one side of the concave steel block by screws, so that the third needle bearing row is installed directly above the first needle bearing row and the gap between the two is smaller than the thickness of the welding wire to be tested, and after the second needle bearing row connecting piece is fixed to the fourth needle bearing row, it is connected to the protrusion on the other side of the concave steel block by screws, so that the fourth needle bearing row is installed directly above the second needle bearing row and the gap between the two is smaller than the thickness of the welding wire to be tested.

2. The dynamic welding wire width measuring device according to claim 1, characterized in that: It also includes a limiting device, which includes a front limiting coarse straightening device and a rear limiting coarse straightening device placed at symmetrical positions in front and behind the width measuring unit. The welding wire to be measured passes through the front limiting coarse straightening device, enters the width measuring unit, and is pulled out from the rear limiting coarse straightening device, so that the welding wire to be measured is limited by the front limiting coarse straightening device and the rear limiting coarse straightening device in the width and thickness directions.

3. The dynamic welding wire width measuring device according to claim 2, characterized in that: The front-limiting rough straightening device and the rear-limiting rough straightening device have the same structure. The front-limiting rough straightening device comprises: a plurality of groups of H-groove bearings, the H-groove bearings are arranged in a left-right staggered manner on the same horizontal plane around a horizontal straight line in space, the spatial straight line serves as a welding wire channel, and the welding wire channel of the rear-limiting rough straightening device is on the same straight line as the welding wire channel of the front-limiting rough straightening device.

4. The dynamic welding wire width measuring device according to claim 1, characterized in that: The clamping mechanism also includes a spring. The length of the screw in the clamping mechanism is greater than the thickness of the first needle bearing row connecting piece and the second needle bearing row connecting piece. The spring sleeve applies downward pressure on each screw so that the first needle bearing row connecting piece and the second needle bearing row connecting piece will not jump up and down during operation.

5. The dynamic 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 wire, and the connecting shaft moves along the axis direction of the connecting shaft.

6. The dynamic welding wire width measuring device according to claim 5, characterized in that: A lubricating device is installed in the positioning hole, and the lubricating device is a graphite bushing.

7. The dynamic 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.

8. The dynamic welding wire width measuring device according to claim 1, characterized in that: The sensing device is a micrometer.

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