Welding wheel pressure value detection device of resistance welding machine

Abstract

The utility model discloses a welding wheel pressure value detection device of a resistance welding machine, which comprises a strip-shaped bracket, a large welding wheel, a small welding wheel, a mounting seat, a pressing rod, a pressure value scale, a pressure adjusting mechanism capable of adjusting the pressing rod up and down and an annular pressure sensor, and the large welding wheel is rotatably arranged at one end of the strip-shaped bracket; the pressing rod is arranged on the mounting base in a vertically movable mode and makes contact with the strip-shaped support, the pressure value ruler is arranged at the top end of the pressing rod, and the pressure adjusting mechanism is arranged on the mounting base; the pressure adjusting mechanism comprises an adjusting part, an upper pressing plate and a compression spring; the adjusting part is arranged on the mounting seat in a manner of moving up and down; the upper pressing plate and the annular pressure sensor are arranged on the pressing rod in a sleeving mode, and a lower check block is fixedly arranged on the pressing rod. And the compression spring is sleeved on the compression rod. The welding wheel pressure value detection device of the resistance welding machine can detect the pressure of the large welding wheel in real time, and the situation that pressure sudden change cannot be found in time in the continuous working process is avoided.

Description

Technical Field

[0001] This utility model relates to metal processing equipment, and in particular to a device for detecting the welding wheel pressure value of a resistance welding machine. Background Technology

[0002] In the field of metal processing and manufacturing, resistance welding machines are widely used for welding seams in various tanks due to their advantages such as high welding efficiency and stable joint quality. Among them, the large welding wheel, as the core actuator of the resistance welding machine to realize current conduction and pressure application, directly determines the contact resistance of the welding area, the uniformity of heat distribution, and the strength and sealing of the final weld, thus playing a crucial role in the welding effect.

[0003] Especially in high-speed welding applications, the fast welding cycle and high workpiece conveying speed make the contact state between the large welding wheel and the workpiece more susceptible to external factors, such as welding wheel wear, workpiece surface flatness deviations, and changes in mechanical transmission mechanism clearances. This makes the welding wheel pressure more sensitive to the welding effect. During high-speed welding, even small pressure fluctuations can lead to insufficient or excessive heat generation in the welding area, resulting in problems such as incomplete welds, burn-through, and substandard weld strength. This not only affects product quality stability but may also increase subsequent rework costs and even pose safety hazards.

[0004] However, current industry methods for monitoring and controlling the pressure of the large welding wheel in resistance welding machines still have significant shortcomings. Existing technologies generally use approximate pressure gauges to set and adjust the welding wheel pressure. That is, during the equipment installation and commissioning phase, the welding wheel pressure is initially calibrated using a pressure gauge to determine a theoretically suitable pressure range. After that, real-time monitoring and attention to the pressure value are no longer conducted during subsequent continuous operation. This approach has two major drawbacks: First, the approximate pressure gauge only provides a rough pressure reference and cannot accurately reflect the true pressure value when the welding wheel contacts the workpiece during actual welding, making it difficult to meet the stringent pressure accuracy requirements of high-speed welding. Second, during continuous equipment operation, when factors such as increased welding wheel wear, loose mechanical parts, or fluctuations in air source pressure cause sudden changes in the large welding wheel pressure, existing monitoring methods cannot detect this anomaly in time, nor can they trigger alarms or shutdown mechanisms. This leads to the production of batches of defective products, seriously affecting production efficiency and product quality, and may even cause irreversible damage to the equipment. Utility Model Content

[0005] The technical problem to be solved by this utility model is to provide a welding wheel pressure value detection device for a resistance welding machine. This welding wheel pressure value detection device can detect the pressure of the large welding wheel in real time, so as to avoid the failure to detect sudden pressure changes during continuous operation.

[0006] To solve the above technical problems, the following technical solution is adopted:

[0007] A welding wheel pressure detection device for a resistance welding machine includes a strip-shaped support, a large welding wheel, a small welding wheel, a mounting base, a pressure rod, a pressure scale, and a pressure adjustment mechanism capable of adjusting the pressure rod vertically. The large welding wheel is rotatably mounted on one end of the strip-shaped support, and the positions of the large and small welding wheels correspond to each other. The pressure rod is vertically movable and mounted on the mounting base, with its lower end contacting the end of the strip-shaped support. The pressure scale is located at the top of the pressure rod, and the pressure adjustment mechanism is mounted on the mounting base. The device is characterized by further including a ring-shaped pressure sensor. The mechanism includes an adjusting component, an upper pressure plate, and a compression spring. The adjusting component is movably mounted on the mounting base. The upper pressure plate and the annular pressure sensor are movably sleeved on the pressure rod. A lower stop is fixedly mounted on the pressure rod, and the upper pressure plate and the lower stop together clamp the annular pressure sensor. The compression spring is sleeved on the pressure rod, and the upper end of the compression spring is in close contact or connected to the adjusting component, while the lower end of the compression spring is in close contact or connected to the upper pressure plate. The signal output terminal of the annular pressure sensor is electrically connected to the corresponding signal input terminal of the controller of the resistance welding machine.

[0008] In the aforementioned welding wheel pressure detection device, the other end of the strip-shaped support is hinged to the frame of the resistance welding machine, and the small welding wheel can be rotatably mounted on the frame of the resistance welding machine. Before welding, the pressure of the large welding wheel can be set and adjusted through the pressure adjustment mechanism. During adjustment, the adjusting component is moved up and down, so that the adjusting component can drive the upper pressure plate, the annular pressure sensor and the lower stop block to move through the compression spring, so that the pressure rod moves up and down accordingly, thereby adjusting the degree of downward pressure of the lower end of the pressure rod on the strip-shaped support. Then, by reading the pressure value on the pressure value scale, the corresponding pressure of the large welding wheel can be adjusted. During welding, the cans to be welded are continuously conveyed, and the parts to be welded on the cans pass between the large and small welding wheels. Under the pressure of the pressure rod, the large welding wheel can always keep the side wall of the can and the small welding wheel pressed tightly. When each can passes through at high speed (generally 80-1000 cans per minute), the large welding wheel and the pressure rod will vibrate at a micro-distance and high frequency under the action of the compression spring. At this time, the lower stop block will also continuously press the ring pressure sensor. Therefore, the ring pressure sensor can detect the pressure value change in real time with continuous movement and send the pressure value to the controller of the resistance welding machine in real time. The pressure value is displayed in real time on the control panel of the controller. The controller has a preset pressure value change range. When the pressure value changes beyond the range, the controller will issue an alarm to remind the staff to stop the machine in time.

[0009] In a preferred embodiment, the adjusting component includes an adjusting outer cylinder and an annular upper top plate. The annular upper top plate is connected to the upper end of the adjusting outer cylinder. The pressure rod passes through the adjusting outer cylinder and the annular upper top plate, and the upper edge of the annular upper top plate corresponds to the position of the pressure value scale. The compression spring is located inside the adjusting outer cylinder, and its upper end is compressed. With this structure, when adjusting the pressure, the annular upper top plate can move the upper pressure plate, the annular pressure sensor, and the lower stop block via the compression spring, causing the pressure rod to move up and down accordingly. Simultaneously, the upper edge of the annular upper top plate can also serve as a pointer, and the corresponding graduation on the pressure value scale is the current pressure value.

[0010] In a further preferred embodiment, the outer wall of the adjusting outer cylinder is provided with external threads, and the mounting base is provided with an adjusting hole that matches the adjusting outer cylinder. The inner wall of the adjusting hole is provided with an internal thread that matches the external threads. When adjusting the pressure, the adjusting component can be moved up and down simply by turning the adjusting outer cylinder, and when the adjustment is stopped, the threaded engagement can also fix the adjusting component in the current position, thereby maintaining stability.

[0011] In a preferred embodiment, the lower end of the pressure rod is shaped like a spherical cap, and the strip-shaped support has an arc-shaped groove at a position corresponding to the lower end of the pressure rod, the arc-shaped groove matching the shape of the lower end of the pressure rod. This design ensures that the pressure rod will not detach from the strip-shaped support under high-frequency vibration.

[0012] In a preferred embodiment, the lower edge of the upper pressure plate is provided with a downwardly extending annular limiting plate, the annular limiting plate matching the shape of the annular pressure sensor and covering the annular pressure sensor. Typically, the wall surface of the annular limiting plate also has a through hole for the data cable of the annular pressure sensor to pass through.

[0013] In a preferred embodiment, the large welding wheel is rotatably mounted on one end of the strip-shaped support via a power shaft. Typically, the other end of the power shaft is connected to the power mechanism of the resistance welding machine.

[0014] The beneficial effect of this utility model is that this welding wheel pressure detection device can detect the pressure of the large welding wheel in real time, avoiding the inability to detect sudden pressure changes during continuous operation. Attached Figure Description

[0015] Figure 1 This is a cross-sectional view of the welding wheel pressure value detection device in an embodiment of this utility model;

[0016] Figure 2 This is a partial cross-sectional view of the welding wheel pressure detection device installed on the resistance welding machine in an embodiment of this utility model;

[0017] Figure 3 This is an enlarged view of the upper pressure plate and the annular pressure sensor in an embodiment of this utility model. Detailed Implementation

[0018] The present invention will be further described below with reference to the accompanying drawings and specific embodiments:

[0019] like Figure 1-3 The device shown is a welding wheel pressure detection device for a resistance welding machine, comprising a strip-shaped support 1, a large welding wheel 2, a small welding wheel 3, a mounting base 4, a pressure rod 5, a pressure scale 6, a pressure adjustment mechanism capable of vertically adjusting the pressure rod 5, and a ring pressure sensor 7. The large welding wheel 2 is rotatably mounted on one end of the strip-shaped support 1, and the positions of the large welding wheel 2 and the small welding wheel 3 correspond to each other. The pressure rod 5 is vertically movable and mounted on the mounting base 4, with its lower end contacting the end of the strip-shaped support 1. The pressure scale 6 is located at the top of the pressure rod 5. The pressure adjustment mechanism is mounted on the mounting base 4. The pressure adjustment mechanism includes an adjustment... The adjustment component 8, upper pressure plate 9, and compression spring 10 are mounted on the mounting base 4, and the upper pressure plate 9 and the annular pressure sensor 7 are respectively movably sleeved on the pressure rod 5. A lower stop 501 is fixedly installed on the pressure rod 5, and the upper pressure plate 9 and the lower stop 501 together clamp the annular pressure sensor 7. The compression spring 10 is sleeved on the pressure rod 5, and the upper end of the compression spring 10 is in close contact or connected to the adjustment component 8, and the lower end of the compression spring 10 is in close contact or connected to the upper pressure plate 9. The signal output terminal of the annular pressure sensor 7 is electrically connected to the corresponding signal input terminal of the controller of the resistance welding machine.

[0020] In the aforementioned welding wheel pressure detection device, the other end of the strip-shaped support 1 is hinged to the frame of the resistance welding machine, and the small welding wheel 3 is rotatably mounted on the frame of the resistance welding machine. Before welding, the pressure of the large welding wheel 2 can be set and adjusted through the pressure adjustment mechanism. During adjustment, the adjusting component 8 is moved up and down, so that the adjusting component 8 can drive the upper pressure plate 9, the annular pressure sensor 7 and the lower stop 501 to move through the compression spring 10, so that the pressure rod 5 moves up and down accordingly, thereby adjusting the degree of downward pressure of the lower end of the pressure rod 5 on the strip-shaped support 1. Then, by reading the pressure value on the pressure value scale 6, the corresponding pressure of the large welding wheel 2 can be adjusted. During welding, the cans 11 to be welded are continuously conveyed, and the parts to be welded on the cans 11 pass between the large and small welding wheels 3. Under the pressure of the pressure rod 5, the large welding wheel 2 can always keep the side wall of the can 11 and the small welding wheel 3 pressed tightly. When each can 11 passes through at high speed (generally 80-1000 per minute), the large welding wheel 2 and the pressure rod 5 will vibrate at a micro-distance and high frequency under the action of the compression spring 10. At this time, the lower stop 501 will also continuously press the annular pressure sensor 7. Therefore, the annular pressure sensor 7 can detect the pressure value change in real time as it moves and send the pressure value to the controller of the resistance welding machine in real time. The pressure value change range is preset in the controller. When the pressure value change exceeds the range, the controller will issue an alarm to remind the staff to stop the machine in time.

[0021] The adjusting component 8 includes an adjusting outer cylinder 801 and an annular upper top plate 802. The annular upper top plate 802 is connected to the upper end of the adjusting outer cylinder 801. The pressure rod 5 passes through the adjusting outer cylinder 801 and the annular upper top plate 802, and the upper edge of the annular upper top plate 802 corresponds to the position of the pressure value scale 6. The compression spring 10 is located inside the adjusting outer cylinder 801, and the upper end of the compression spring 10 is also located there. With this structure, when adjusting the pressure, the annular upper top plate 802 can move the upper pressure plate 9, the annular pressure sensor 7, and the lower stop 501 through the compression spring 10, causing the pressure rod 5 to move up and down accordingly. At the same time, the upper edge of the annular upper top plate 802 can also serve as a pointer, and the scale corresponding to it on the pressure value scale 6 is the current pressure value.

[0022] The outer wall of the adjusting outer cylinder 801 is provided with an external thread 8011, and the mounting base 4 is provided with an adjusting hole 401 that matches the adjusting outer cylinder 801. The inner wall of the adjusting hole 401 is provided with an internal thread that matches the external thread 8011. When adjusting the pressure, the adjusting element 8 can be moved up and down simply by turning the adjusting outer cylinder 801. When the adjustment is stopped, the threaded engagement can also fix the adjusting element 8 in the current position, thereby maintaining stability.

[0023] The lower end of the pressure rod 5 is shaped like a spherical cap, and the strip-shaped support 1 has an arc-shaped groove 101 at a position corresponding to the lower end of the pressure rod 5. The arc-shaped groove 101 matches the shape of the lower end of the pressure rod 5. By adopting this arrangement, it can be ensured that the pressure rod 5 will not lose contact with the strip-shaped support 1 under high-frequency vibration.

[0024] The lower edge of the upper pressure plate 9 is provided with a downwardly extending annular limiting plate 901, which matches the shape of the annular pressure sensor 7 and covers the annular pressure sensor 7. Typically, the wall surface of the annular limiting plate 901 also has a through hole 9011 for the data line 701 of the annular pressure sensor 7 to pass through.

[0025] The large welding wheel 2 is rotatably mounted on one end of the strip-shaped support 1 via the power shaft 12. Typically, the other end of the power shaft is connected to the power mechanism 13 of the resistance welding machine.

Claims

1. A welding wheel pressure value detection device for a resistance welding machine, comprising a strip-shaped support, a large welding wheel, a small welding wheel, a mounting base, a pressure rod, a pressure value scale, and a pressure adjustment mechanism capable of adjusting the pressure rod vertically; the large welding wheel is rotatably mounted on one end of the strip-shaped support, and the positions of the large welding wheel and the small welding wheel correspond to each other; the pressure rod is vertically movable and mounted on the mounting base, and the lower end of the pressure rod contacts the end of the strip-shaped support; the pressure value scale is located at the top of the pressure rod; and the pressure adjustment mechanism is located on the mounting base; characterized in that: It also includes a ring pressure sensor. The pressure adjustment mechanism includes an adjusting element, an upper pressure plate, and a compression spring. The adjusting element is movably mounted on the mounting base. The upper pressure plate and the ring pressure sensor are movably sleeved on the pressure rod. A lower stop is fixedly mounted on the pressure rod, and the upper pressure plate and the lower stop together clamp the ring pressure sensor. The compression spring is sleeved on the pressure rod, and the upper end of the compression spring is in close contact or connected to the adjusting element, and the lower end of the compression spring is in close contact or connected to the upper pressure plate. The signal output terminal of the ring pressure sensor is electrically connected to the corresponding signal input terminal of the controller of the resistance welding machine.

2. The device for detecting the welding wheel pressure value of a resistance welding machine as described in claim 1, characterized in that: The adjusting component includes an adjusting outer cylinder and an annular upper top plate. The annular upper top plate is connected to the upper end of the adjusting outer cylinder. The pressure rod passes through the adjusting outer cylinder and the annular upper top plate, and the upper edge of the annular upper top plate corresponds to the position of the pressure value scale. The compression spring is located inside the adjusting outer cylinder, and the upper end of the compression spring is also located inside the cylinder.

3. The device for detecting the welding wheel pressure value of a resistance welding machine as described in claim 2, characterized in that: The outer wall of the adjusting outer cylinder is provided with an external thread, and the mounting base is provided with an adjusting hole that matches the adjusting outer cylinder. The inner wall of the adjusting hole is provided with an internal thread that matches the external thread.

4. The device for detecting the welding wheel pressure value of a resistance welding machine as described in claim 1, characterized in that: The lower end of the pressure rod is spherical, and the strip-shaped bracket is provided with an arc-shaped groove at the position corresponding to the lower end of the pressure rod. The arc-shaped groove matches the shape of the lower end of the pressure rod.

5. The device for detecting the welding wheel pressure value of a resistance welding machine as described in claim 1, characterized in that: The lower edge of the upper pressure plate is provided with a downwardly extending annular limiting plate, which matches the shape of the annular pressure sensor and covers the annular pressure sensor.

6. The device for detecting the welding wheel pressure value of a resistance welding machine as described in claim 1, characterized in that: The large welding wheel is rotatably mounted on one end of the strip-shaped bracket via a power shaft.

Images