Weld joint polishing device and control method thereof

Abstract

The invention relates to a weld joint polishing device and a control method thereof. The welding seam polishing device comprises a rack. The first lead screw mechanism is transversely erected in the middle of the rack; the second screw rod mechanism is vertically arranged on the first screw rod mechanism, a first grinding disc and a second grinding disc which move reversely when the second screw rod mechanism rotates are mounted on the second screw rod mechanism, and the first grinding disc and the second grinding disc are elastic grinding discs which deform to be attached to the contact surface of the part to be ground during grinding. Horizontal constant-speed feeding of the first grinding disc and the second grinding disc is controlled through the first lead screw mechanism, and the second lead screw mechanism is arranged to control the grinding depth, so that the phenomenon of different grinding depths is avoided, the grinding precision is improved, and the smoothness and flatness of the surface of a welding seam are improved; the first grinding disc and the second grinding disc which are elastic are selected to adapt to the surface shape and contour of the weld joint, so that the purpose of grinding by tightly fitting the surface of the weld joint is achieved, and the grinding precision is further improved.

Description

Technical Field

[0001] The present application relates to the technical field of weld grinding, and in particular to a weld grinding device and a control method thereof. Background Art

[0002] The main purpose of weld grinding is to make the weld surface smooth and flat, and to remove burrs, flaws, uneven areas, weld nodules, weld slag and other defects generated during the welding process.

[0003] In the production of contact element type electrode shells for ferroalloy smelting, the grinding flatness of the electrode shell ribs after seam welding is very critical. Uneven grinding of the ribs will cause poor contact of the contact elements of the smelting furnace and cause electrode accidents.

[0004] In traditional technology, manual angle grinders are usually used to grind the welds of ribs. However, manual grinding relies on experience, resulting in low grinding accuracy. Summary of the invention

[0005] In order to solve or partially solve the problems existing in the related art, the present application provides a weld grinding device and a control method thereof.

[0006] To achieve the above objectives, this application is implemented through the following technical solutions:

[0007] A weld grinding device, the weld grinding device comprising:

[0008] frame;

[0009] A first screw mechanism is transversely mounted in the middle of the frame;

[0010] A second screw mechanism is vertically arranged on the first screw mechanism, on which are mounted the first grinding disc and the second grinding disc which move in opposite directions when the second screw mechanism rotates, the first grinding disc and the second grinding disc being elastic grinding discs which are deformed to fit the contact surface of the workpiece to be polished during polishing;

[0011] Among them, a distance sensor is provided between the first grinding disc and the second grinding disc. The first screw mechanism controls the second screw mechanism to maintain uniform movement at different target speeds in the horizontal direction by forward / reverse rotation. The second screw mechanism adjusts the distance between the first grinding disc and the second grinding disc by forward / reverse rotation, thereby controlling the grinding depth.

[0012] Optionally, the first screw mechanism includes:

[0013] The first mounting platform is provided with two groups of first slide rails, a first screw rod is provided between the two groups of first slide rails, and one end of the first screw rod is connected to a first servo motor.

[0014] Optionally, a first slider is threadedly connected to the first screw rod, and the first slider is slidably connected to the first slide rail.

[0015] Optionally, the second screw mechanism includes:

[0016] The second mounting platform is fixed on the end surface of the first slider away from the first slide rail. Two sets of second slide rails are arranged on the second mounting platform. A second screw rod is arranged between the two sets of second slide rails. One end of the second screw rod is connected to a second servo motor.

[0017] Optionally, a second slider and a third slider having opposite rotation directions are threadedly connected to the second screw rod, and the second slider and the third slider are slidably connected to the second slide rail.

[0018] Optionally, a first driving motor for driving the first grinding disc is installed on the end surface of the second slider away from the second slide rail, and a second driving motor for driving the second grinding disc is installed on the end surface of the third slider away from the second slide rail.

[0019] Optionally, four traveling wheels are provided at the bottom of the frame, and legs for adjusting the height are provided on the bottom plate of the frame, and the legs are locked and fixed to the bottom plate by nuts.

[0020] A control method for a weld grinding device comprises the steps of:

[0021] S1, upon receiving an operation instruction, controlling the second screw mechanism to rotate clockwise / counterclockwise at a first target speed to adjust the spacing between the first grinding disc and the second grinding disc to a target spacing;

[0022] S2, when the spacing is adjusted to the target spacing, stopping the second screw mechanism;

[0023] S3, controlling the first grinding disc and the second grinding disc to rotate at a target grinding speed;

[0024] S4, controlling the first screw mechanism to rotate clockwise / counterclockwise at a second target speed, so as to control the second screw mechanism to move horizontally at a target speed at a uniform speed, thereby controlling the contact time of the first grinding disc and the second grinding disc with the workpiece to be polished.

[0025] Optionally, after step S1, the method further includes:

[0026] Determine whether the operation instruction contains polishing level information;

[0027] If included, obtaining the target speed of the second screw mechanism corresponding to the polishing degree level information, and the corresponding target polishing rotation speed;

[0028] A second target rotational speed corresponding to the first screw mechanism is determined according to the target grinding rotational speed.

[0029] Optionally, step S1 includes:

[0030] Three judgment methods:

[0031] 1. Determine the target preset duration according to the target distance in the instruction, and stop rotating when the rotation time reaches the preset duration; or,

[0032] 2. A distance sensor is provided between the first grinding disc and the second grinding disc, and when it is detected that the detection distance between the first grinding disc and the second grinding disc reaches the target distance, the second screw rod is controlled to stop rotating; or,

[0033] 3. When it is manually detected that the detection distance between the first grinding disc and the second grinding disc reaches the target distance, the second screw rod is controlled to stop rotating.

[0034] The beneficial effects of the present application are as follows: the present application controls the horizontal uniform feeding of the first grinding disc and the second grinding disc through the first screw mechanism, and sets the second screw mechanism to control the grinding depth to avoid the occurrence of uneven grinding depths, thereby improving the grinding accuracy, improving the smoothness and flatness of the weld surface, and by selecting the elastic first grinding disc and the second grinding disc to adapt to the surface shape and contour of the weld, the purpose of grinding the weld surface in close contact can be achieved, thereby further improving the grinding accuracy.

[0035] It should be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] The above and other objects, features and advantages of the present application will become more apparent through a more detailed description of exemplary embodiments of the present application in conjunction with the accompanying drawings, wherein the same reference numerals generally represent the same components in the exemplary embodiments of the present application.

[0037] Figure 1 is a first perspective view of a weld grinding device shown in an embodiment of the present application;

[0038] Figure 2 is a second viewing angle diagram of the weld grinding device shown in the embodiment of the present application;

[0039] Figure 3 is a third viewing angle diagram of the weld grinding device shown in the embodiment of the present application;

[0040] Figure 4 is a flow chart of the control method shown in the third embodiment of the present application;

[0041] Figure 5 This is a flow chart of the control method shown in Example 4 of the present application.

[0042] Figure numerals: 1 frame, 2 first screw mechanism, 3 second screw mechanism, 4 first grinding disc, 5 second grinding disc, 6 first mounting table, 7 first slide rail, 8 first screw, 9 first servo motor, 10 first slider, 11 second mounting table, 12 second slide rail, 13 second screw, 14 second servo motor, 15 second slider, 16 third slider, 17 first drive motor, 18 second drive motor, 19 traveling wheel, 20 support leg. DETAILED DESCRIPTION

[0043] In the description of the present invention, it is to be understood that the terms “center”, “longitudinal”, “lateral”, “length”, “width”, “thickness”, “up”, “down”, “front”, “back”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inside”, “outside”, “clockwise”, “counterclockwise”, “axial”, “radial”, “circumferential”, etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0044] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0045] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to the specific situation.

[0046] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0047] In the present invention, the terms "one embodiment", "some embodiments", "examples", "specific examples" or "some examples" etc. mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, unless they are contradictory.

[0048] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may change, modify, replace and vary the above embodiments within the scope of the present invention.

[0049] The above description is only an optional embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.

[0050] In order to make the purpose, technical solutions and beneficial effects of the present application clearer, the preferred embodiments of the present application will be described in detail below in conjunction with the accompanying drawings to facilitate understanding by technical personnel.

[0051] Embodiment 1:

[0052] See also Figures 1 to 3 , a weld grinding device, the weld grinding device comprising:

[0053] Rack 1;

[0054] A first screw mechanism 2 is transversely mounted in the middle of the frame 1;

[0055] A second screw mechanism 3 is vertically arranged on the first screw mechanism 2, on which a first grinding disc 4 and a second grinding disc 5 are installed, which move in opposite directions when the second screw mechanism 3 rotates. The first grinding disc 4 and the second grinding disc 5 are elastic grinding discs that are deformed to fit the contact surface of the workpiece to be polished during polishing;

[0056] Among them, a distance sensor is provided between the first grinding disc 4 and the second grinding disc 5. The first screw mechanism 3 controls the second screw mechanism 3 to maintain uniform movement at different target speeds in the horizontal direction by forward / reverse rotation. The second screw mechanism 3 adjusts the distance between the first grinding disc 4 and the second grinding disc 5 by forward / reverse rotation, thereby controlling the grinding depth.

[0057] Specifically, the fixed side of the first screw mechanism 2 is fixed to the middle part of the frame 1, the working side of the first screw mechanism 2 is connected to the fixed side of the second screw mechanism 3, and the first grinding disc 4 and the second grinding disc 5 are installed on the working side of the second screw mechanism 3. When the first screw mechanism 2 rotates forward / reverse, its rotational motion is converted into the linear movement of the second screw mechanism 3, so that the second screw mechanism 3 maintains a uniform movement at different target speeds in the horizontal direction, so that the second screw mechanism 3 drives the first grinding disc 4 and the second grinding disc 5 to move synchronously, thereby realizing the horizontal feeding of the first grinding disc 4 and the second grinding disc 5. When the second screw mechanism 3 rotates forward / reverse, its rotational motion is converted into the linear movement of the first grinding disc 4 and the second grinding disc 5, so that the first grinding disc 4 and the second grinding disc 5 move away from or close to each other on the vertical line, thereby adjusting the distance between the first grinding disc 4 and the second grinding disc 5, thereby realizing the control of the grinding depth.

[0058] In this embodiment, considering that it is difficult to control the grinding feed speed and grinding depth by manual grinding, the manual grinding cannot ensure a uniform feed speed, which easily leads to uneven surface quality after grinding, and different grinding depths will lead to uneven weld surface, which also affects the surface quality. Therefore, a first screw mechanism 2 is set to control the horizontal uniform feeding of the first grinding disc 4 and the second grinding disc 5, and a second screw mechanism 3 is set to control the grinding depth to avoid the phenomenon of different grinding depths, thereby improving the grinding accuracy.

[0059] The first grinding disc 4 and the second grinding disc 5 are elastic grinding discs that deform to fit the contact surface of the workpiece to be polished during polishing. Since the elastic grinding disc has a certain elasticity, when it contacts the weld of the workpiece to be polished, it can deform according to the surface shape and contour of the weld of the workpiece to be polished to adapt to its surface shape and contour, thereby achieving the effect of closely fitting the weld surface of the workpiece to be polished, thereby helping to reduce the defects and unevenness of the weld surface and improve the polishing accuracy. At the same time, this adaptive adjustment capability can also avoid excessive pressure or friction, which helps to protect the weld surface of the workpiece to be polished and reduce scratches and wear.

[0060] The working process of the present application is as follows: according to the spacing of the welds on both sides of the rib sheet, the second screw mechanism 3 is controlled to rotate forward / reverse to adjust the spacing between the first grinding disc 4 and the second grinding disc 5 to match the spacing of the two welds, and the grinding depth is controlled at the same time. After the spacing adjustment is completed, the second screw mechanism 3 is controlled to stop, and then the first grinding disc 4 and the second grinding disc 5 are controlled to rotate to grind the welds. At the same time, the first screw mechanism 2 is controlled to rotate forward / reverse to control the horizontal feeding direction and feeding speed of the first grinding disc 4 and the second grinding disc 5, so that the feeding speed is within a reasonable range.

[0061] In summary, the present application controls the horizontal uniform feeding of the first grinding disc 4 and the second grinding disc 5 through the first screw mechanism 2, and sets the second screw mechanism 3 to control the grinding depth to avoid the occurrence of uneven grinding depths, thereby improving the grinding accuracy and improving the smoothness and flatness of the weld surface. By selecting the elastic first grinding disc 4 and the second grinding disc 5 to adapt to the surface shape and contour of the weld, the purpose of grinding the weld surface tightly can be achieved, thereby further improving the grinding accuracy.

[0062] Compared with manual grinding, the weld grinding device of the present application can grind two welds at the same time, effectively improving the grinding efficiency and reducing labor intensity; the weld grinding device of the present application can grind rib welds of different sizes, with high flexibility.

[0063] Embodiment 2:

[0064] See also Figure 2 and Figure 3 Based on the first embodiment, optionally, the first screw mechanism 2 includes:

[0065] The first mounting platform 6 is provided with two groups of first slide rails 7 , a first screw rod 8 is provided between the two groups of first slide rails 7 , and one end of the first screw rod 8 is connected to a first servo motor 9 .

[0066] Specifically, one side of the first mounting platform 6 is fixed on the frame 1, and the first slide rail 7 is installed on the other side. The first screw rod 8 is installed between the two sets of first slide rails 7. The first screw rod 8 is driven by the first servo motor 9. The first servo motor 9 is controlled to control the forward / reverse rotation and speed of the first screw rod 8.

[0067] Optionally, a first slider 10 is threadedly connected to the first screw rod 8 , and the first slider 10 is slidably connected to the first slide rail 7 .

[0068] Specifically, the spiral groove of the first screw rod 8 meshes with the internal thread groove of the first slider 10 to achieve power transmission, so that the rotation of the first screw rod 8 is converted into the linear motion of the first slider 10, and then the first slider 10 moves linearly along the first slide rail 7. The first slide rail 7 provides precise guidance for the first slider 10 to ensure that the first slider 10 does not deviate from the predetermined path during movement, thereby improving the movement accuracy and stability of the second screw mechanism 3. At the same time, the first slide rail 7 also bears the weight of the first slider 10 and the load, increasing the stability of the system.

[0069] Optionally, the second screw mechanism 3 includes:

[0070] The second mounting platform 11 is fixed on the end surface of the first slider 10 away from the first slide rail 7. Two sets of second slide rails 12 are arranged on the second mounting platform 11. A second screw rod 13 is arranged between the two sets of second slide rails 12. One end of the second screw rod 13 is connected to a second servo motor 14.

[0071] Specifically, one side of the second mounting platform 11 is fixedly connected to the end face of the first slider 10 away from the first slide rail 7, and the second slide rail 12 is installed on the other side. The second screw rod 13 is installed between the two sets of second slide rails 12. The second screw rod 13 is driven by a second servo motor 14. The second servo motor 14 is controlled to control the forward / reverse rotation and speed of the second screw rod 13.

[0072] Optionally, a second slider 15 and a third slider 16 with opposite rotation directions are threadedly connected to the second screw rod 13 , and the second slider 15 and the third slider 16 are slidably connected to the second slide rail 12 .

[0073] Specifically, the spiral groove of the second screw rod 13 is meshed with the internal thread grooves of the second slider 15 and the third slider 16 to achieve power transmission, so that the rotation of the second screw rod 13 is converted into the linear motion of the second slider 15 and the third slider 16, and then the second slider 15 and the third slider 16 move linearly along the second slide rail 12. Since the thread rotation directions of the second slider 15 and the third slider 16 are opposite, the second slider 15 and the third slider 16 will approach or move away from each other. The second slide rail 12 provides precise guidance for the second slider 15 and the third slider 16 to ensure that the second slider 15 and the third slider 16 will not deviate from the predetermined path during the movement, thereby improving the movement accuracy and stability of the first grinding disc 4 and the second grinding disc 5. At the same time, the second slide rail 12 also bears the weight of the second slider 15, the third slider 16 and the load, increasing the stability of the system.

[0074] Optionally, a first drive motor 17 for driving the first grinding disc 4 is installed on the end surface of the second slider 15 away from the second slide rail 12 , and a second drive motor 18 for driving the second grinding disc 5 is installed on the end surface of the third slider 16 away from the second slide rail 12 .

[0075] Specifically, the second slider 15 and the third slider 16 are respectively provided with a fixing frame, and the first drive motor 17 and the second drive motor 18 are installed through the two fixing frames. The first drive motor 17 and the second drive motor 18 can realize the start and stop control and speed adjustment of the first grinding disc 4 and the second grinding disc 5. By controlling the first grinding disc 4 and the second grinding disc 5 to move at an appropriate speed, the grinding accuracy can be improved and a more uniform and smoother grinding surface can be obtained.

[0076] Optionally, four traveling wheels 19 are provided at the bottom of the frame 1, and legs 20 for adjusting the height are provided on the bottom plate of the frame 1, and the legs 20 are locked and fixed to the bottom plate by nuts.

[0077] Specifically, the traveling wheels 19 are provided to facilitate the movement of the device, and the supporting legs 20 are provided to facilitate the adjustment of the height of the device while fixing the device.

[0078] In this embodiment, the first slide rail 7 is provided to improve the movement accuracy and stability of the second screw mechanism 3, and the second slide rail 12 is provided to improve the movement accuracy and stability of the first grinding disc 4 and the second grinding disc 5, thereby further improving the grinding accuracy.

[0079] Embodiment three:

[0080] See also Figure 4 Based on the above embodiment, a control method of a weld grinding device includes the steps of:

[0081] S1, upon receiving an operation instruction, controlling the second screw mechanism to rotate clockwise / counterclockwise at a first target speed to adjust the spacing between the first grinding disc and the second grinding disc to a target spacing;

[0082] S2, when the spacing is adjusted to the target spacing, stopping the second screw mechanism;

[0083] S3, controlling the first grinding disc and the second grinding disc to rotate at a target grinding speed;

[0084] S4, controlling the first screw mechanism to rotate clockwise / counterclockwise at a second target speed, so as to control the second screw mechanism to move horizontally at a target speed at a uniform speed, thereby controlling the contact time of the first grinding disc and the second grinding disc with the workpiece to be polished.

[0085] Specifically, the operation instruction received by the second screw mechanism comes from a host computer, such as a controller, and the operation instruction includes a first target speed and a rotation direction (clockwise or counterclockwise). The first target speed includes three levels: high, medium and low. Different speed levels are determined according to the moving speeds of the first grinding disc and the second grinding disc. If the moving speeds of the two need to be accelerated, a high or medium first target speed is selected. If the moving speeds of the two need to be slowed down, a low first target speed is selected. In order to reduce the influence of motion inertia on the moving accuracy of the first grinding disc and the second grinding disc, it is better to select a medium or low level for the first target speed. When the second screw mechanism rotates clockwise / counterclockwise at the first target speed, the first grinding disc and the second grinding disc are driven to move closer / away from each other, thereby adjusting the spacing between the two. When the spacing between the first grinding disc and the second grinding disc is adjusted to the target spacing, the second screw mechanism is controlled to stop running, and the target spacing is fixed at this time. In this embodiment, the target spacing is determined according to the spacing between the two welds of the workpiece to be polished, and the target spacing is set at multiple levels, and different levels correspond to different grinding depths.

[0086] After the target spacing is adjusted, an operation instruction is sent to the first grinding disc and the second grinding disc. The operation instruction includes the target grinding speed and direction (clockwise or counterclockwise). The target grinding speed also includes three levels: high, medium and low. The higher the grinding disc speed, the higher the contact frequency between the grinding disc and the workpiece. Too high a speed may cause the grinding disc to overheat, affecting the service life and grinding quality of the grinding disc. Too high a speed may also increase the surface roughness because the movement trajectory of the abrasive particles on the workpiece surface becomes unstable. An appropriate speed can obtain a more uniform and smoother grinding surface. Therefore, it is better to use medium and low speeds. After receiving the operation instruction, the first and second grinding discs rotate at the target grinding speed to achieve high-precision grinding of the weld at the target speed.

[0087] In addition, when considering grinding efficiency, a high rotation speed may be used.

[0088] After the target grinding speed is selected, an operation instruction is sent to the first screw mechanism, which includes the second target speed and the direction (clockwise or counterclockwise). The second target speed includes three levels: high, medium and low. The higher the speed, the faster the horizontal movement speed of the second screw mechanism, and the horizontal feed speed of the first grinding disc and the second grinding disc will also be faster. When the feed speed is too fast, the contact time between the grinding disc and the weld surface is shortened, which is likely to increase the surface roughness and cause defects such as scratches and pits. On the contrary, when the feed speed is too slow, although a smoother surface can be obtained, the grinding time will be prolonged and the efficiency will be reduced. Therefore, under the premise of ensuring the grinding quality, the second target speed can adopt a medium-level speed. After the first screw mechanism receives the operation instruction, the second target speed rotates clockwise / counterclockwise, thereby controlling the second screw mechanism to move horizontally at a uniform speed at the target speed, thereby controlling the contact time between the first grinding disc and the second grinding disc and the workpiece to be polished, thereby improving the grinding accuracy.

[0089] In this embodiment, by controlling the first grinding wheel and the second grinding wheel to run at a uniform speed at a target grinding speed with a target spacing, the first screw mechanism is controlled to rotate clockwise / counterclockwise at a second target speed, and the second screw mechanism is controlled to move horizontally at a target speed, the contact time between the first grinding wheel and the second grinding wheel and the workpiece to be polished is controlled, thereby improving the grinding accuracy.

[0090] Embodiment 4:

[0091] See also Figure 5 Based on the third embodiment, optionally, after step S1, the method further includes:

[0092] Determine whether the operation instruction contains polishing level information;

[0093] If included, obtaining the target speed of the second screw mechanism corresponding to the polishing degree level information, and the corresponding target polishing rotation speed;

[0094] A second target rotational speed corresponding to the first screw mechanism is determined according to the target grinding rotational speed.

[0095] Specifically, the operation instruction includes information on the degree of polishing, and different degrees of polishing are mapped to different target speeds of the second screw mechanism and different target polishing rotation speeds. The target speed of the second screw mechanism affects the moving speeds of the first grinding disc and the second grinding disc. When the moving speeds are different, different motion inertias will have different effects on the accuracy of spacing adjustment and grinding depth adjustment. Similarly, different target polishing rotation speeds have different effects on the uniformity and smoothness of polishing. The second target rotation speed affects the feed speeds of the first grinding disc and the second grinding disc. Different feed speeds affect the length of contact time between the first grinding disc and the second grinding disc and the workpiece to be polished, thereby affecting the polishing accuracy.

[0096] In this embodiment, the system receives and parses the operation instruction, and checks whether the instruction contains the polishing level information. If the instruction contains the polishing level information, the target speed of the second screw mechanism is obtained from a preset mapping table or configuration file according to the polishing level information. At the same time, the target polishing speed corresponding to the polishing level information is obtained, and the second target speed corresponding to the first screw mechanism is determined through the mapping relationship according to the obtained target polishing speed.

[0097] Furthermore, the degree of polishing includes three levels: high, medium and low. Taking the high degree of polishing as an example, the target speed of the second screw mechanism corresponding to the high degree of polishing is low speed. The second screw mechanism rotating at a low speed can slow down the moving speed of the first grinding disc and the second grinding disc, thereby reducing the influence of motion inertia on the adjustment accuracy of the distance between the first grinding disc and the second grinding disc, facilitating the precise control of the target distance and grinding depth, and realizing precise adjustment of the grinding depth; the target grinding rotation speed of the first grinding disc and the second grinding disc corresponding to the high degree of polishing is medium and low speed, and medium and low speed grinding helps to improve the uniformity and accuracy of grinding; the second target rotation speed of the first screw mechanism corresponding to the medium and low speed target grinding rotation speed is low speed, and the low speed first screw mechanism slows down the horizontal movement speed of the second screw mechanism, thereby increasing the contact time of the first grinding disc and the second grinding disc with the workpiece to be polished, thereby improving the grinding accuracy.

[0098] When considering grinding accuracy, you can choose a high level of grinding. If you consider grinding efficiency, you can choose a medium or low level of grinding.

[0099] Embodiment five:

[0100] Based on the above embodiment, optionally, step S1 includes:

[0101] Three judgment methods:

[0102] 1. Determine the target preset duration according to the target distance in the instruction, and stop rotating when the rotation time reaches the preset duration;

[0103] Specifically, initially, the spacing between the first grinding disc and the second grinding disc is adjusted to 0. According to the polishing level information, the rotation speed of a second screw mechanism is determined, and the moving speed of the first grinding disc and the second grinding disc is calculated by the screw rotation speed. The target spacing is obtained from the instruction, and the target preset duration is calculated by the target spacing and the moving speed. The second screw mechanism starts running at a given speed, and records the time when the rotation starts, checks the difference between the current time and the start time of the rotation, and when the difference reaches the preset duration, the second screw mechanism stops rotating. In this way, the spacing adjustment is achieved. After each grinding operation is completed, the spacing between the first grinding disc and the second grinding disc is adjusted to 0.

[0104] 2. A distance sensor is provided between the first grinding disc and the second grinding disc. When it is detected that the detection distance between the first grinding disc and the second grinding disc reaches the target distance, the second screw rod is controlled to stop rotating;

[0105] Specifically, the distance between the first grinding wheel and the second grinding wheel is detected in real time by a distance sensor, and the detection data is transmitted to the control system. After receiving the detection distance, the system compares it with the target distance. If the detection distance is smaller than the target distance, the second screw rod continues to run. When the detection distance coincides with the target distance, the second screw rod is controlled to stop.

[0106] 3. When it is manually detected that the detection distance between the first grinding disc and the second grinding disc reaches the target distance, the second screw rod is controlled to stop rotating.

[0107] Specifically, the distance between the first grinding wheel and the second grinding wheel is detected manually by visual observation or by using a measuring tool, and the detected distance is compared with the target spacing. If the detected distance is smaller than the target spacing, the second screw rod is controlled to continue running. When the detected distance reaches the target spacing, the second screw rod is controlled to stop.

[0108] It should be noted that structures and / or installation methods not described in detail in this application are known to those skilled in the art in combination with common knowledge and / or prior art, and are not the focus of disclosure in this application and will not be further elaborated herein.

[0109] Finally, it should be noted that the above preferred embodiments are only used to illustrate the technical solution of the present application rather than to limit it. Although the present application has been described in detail through the above preferred embodiments, those skilled in the art should understand that various changes can be made in form and details without departing from the scope defined by the claims of the present application; the dimensions of the drawings are not related to the specific objects, and the dimensions of the objects can be changed arbitrarily.

Claims

1. A weld grinding device, characterized in that: The weld grinding device comprises: Rack (1); A first screw mechanism (2) transversely mounted in the middle of the frame (1); A second screw mechanism (3) is vertically arranged on the first screw mechanism (2), and is provided with a first grinding disc (4) and a second grinding disc (5) which move in opposite directions when the second screw mechanism (3) rotates, wherein the first grinding disc (4) and the second grinding disc (5) are elastic grinding discs which are deformed to fit the contact surface of the workpiece to be ground during grinding; A distance sensor is provided between the first grinding disc (4) and the second grinding disc (5); the first screw mechanism (2) controls the second screw mechanism (3) to maintain uniform movement at different target speeds in the horizontal direction by forward / reverse rotation; the second screw mechanism (3) adjusts the distance between the first grinding disc (4) and the second grinding disc (5) by forward / reverse rotation, thereby controlling the grinding depth.

2. The weld grinding device according to claim 1, characterized in that: The first screw mechanism (2) comprises: A first mounting platform (6) is provided with two groups of first slide rails (7), a first screw rod (8) is provided between the two groups of first slide rails (7), and one end of the first screw rod (8) is connected to a first servo motor (9).

3. The weld grinding device and control method thereof according to claim 2, characterized in that: A first sliding block (10) is threadedly connected to the first screw rod (8), and the first sliding block (10) is slidably connected to the first sliding rail (7).

4. The weld grinding device according to claim 1, characterized in that: The second screw mechanism (3) comprises: The second mounting platform (11) is fixed on an end surface of the first sliding block (10) away from the first sliding rail (7). Two sets of second sliding rails (12) are arranged on the second mounting platform (11). A second screw rod (13) is arranged between the two sets of second sliding rails (12). One end of the second screw rod (13) is connected to a second servo motor (14).

5. The weld grinding device according to claim 4, characterized in that: The second screw rod (13) is threadedly connected with a second slider (15) and a third slider (16) with opposite rotation directions. The second slider (15) and the third slider (16) are slidably connected to the second slide rail (12).

6. The weld grinding device according to claim 5, characterized in that: A first drive motor (17) for driving the first grinding disc (4) is installed on the end surface of the second slider (15) away from the second slide rail (12), and a second drive motor (18) for driving the second grinding disc (5) is installed on the end surface of the third slider (16) away from the second slide rail (12).

7. The weld grinding device according to claim 1, characterized in that: Four traveling wheels (19) are arranged at the bottom of the frame (1), and supporting legs (20) for adjusting the height are arranged on the bottom plate of the frame (1), and the supporting legs (20) are locked and fixed to the bottom plate by nuts.

8. The control method of the weld grinding device according to any one of claims 1 to 7, characterized in that: Includes steps: S1, upon receiving an operation instruction, controlling the second screw mechanism to rotate clockwise / counterclockwise at a first target speed to adjust the spacing between the first grinding disc and the second grinding disc to a target spacing; S2, when the spacing is adjusted to the target spacing, stopping the second screw mechanism; S3, controlling the first grinding disc and the second grinding disc to rotate at a target grinding speed; S4, controlling the first screw mechanism to rotate clockwise / counterclockwise at a second target speed, so as to control the second screw mechanism to move horizontally at a target speed at a uniform speed, thereby controlling the contact time of the first grinding disc and the second grinding disc with the workpiece to be polished.

9. The control method of the weld grinding device according to claim 8, characterized in that: After step S1, the method further includes: Determine whether the operation instruction contains polishing level information; If included, obtaining the target speed of the second screw mechanism corresponding to the polishing degree level information, and the corresponding target polishing rotation speed; A second target rotational speed corresponding to the first screw mechanism is determined according to the target grinding rotational speed.

10. The control method of the weld grinding device according to claim 8, characterized in that: Step S1 includes: Three judgment methods:

1. Determine the target preset duration according to the target distance in the instruction, and stop rotating when the rotation time reaches the preset duration; or 2. A distance sensor is provided between the first grinding disc and the second grinding disc, and when it is detected that the detection distance between the first grinding disc and the second grinding disc reaches the target distance, the second screw rod is controlled to stop rotating; or, 3. When it is manually detected that the detection distance between the first grinding disc and the second grinding disc reaches the target distance, the second screw rod is controlled to stop rotating.

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