An automatic grinding machine for the inner arc planer blade of a high-frequency welded pipe for refrigeration.

Abstract

This utility model discloses an automatic grinding machine for inner arc planer blades used in refrigeration high-frequency welded pipes. It features a work cabinet with a worktable and a control console mounted on the work cabinet. The work cabinet houses a workpiece holder, a surface grinding frame, and an arc grinding frame. The workpiece holder moves along the X and Y axes, while the surface and arc grinding frames are located at two separate stations and move along their respective Z axes. A first distance-measuring and positioning device is mounted on the surface grinding frame, and a second distance-measuring and positioning device is mounted on the arc grinding frame. Employing an XYZ three-axis linkage + dual-station grinding system, the machine achieves automatic positioning, distance measurement, and grinding of the planer blade, improving processing accuracy and shape consistency. Precise control via diamond grinding wheels and PLC ensures that the dimensions and shape of the inner arc R conform to standards. The machine has a long service life and a user-friendly working environment. It is suitable for grinding planer blades of different specifications, offering strong versatility and high production efficiency.

Description

Technical Field

[0001] This utility model relates to a grinding device, belonging to the field of metal cutting tool processing technology, and in particular to an automatic grinding machine for an inner arc planer for high-frequency welded pipes used in refrigeration. Background Technology

[0002] The outer weld seam of high-frequency welded pipes used in refrigeration typically requires planing with an inner arc radius planer to ensure a smooth, burr-free weld, thereby improving the pipe's flaring performance and overall quality. However, currently, the grinding of inner arc radius planers mainly relies on manual operation, which presents the following problems: manual grinding has low precision; the inner arc radius planer is usually manually ground by operators on a standard silica grinding wheel, and the outer arc radius of the grinding wheel also needs to be manually adjusted using a grinding wheel shaping tool. Because it relies entirely on experience, the inner arc shape of the planer blade is irregular, and the radius dimension is inconsistent, leading to unstable quality of the outer weld seam after planing and making it prone to defects such as flaring cracks.

[0003] Existing automated equipment has limitations. While some arc-shaped blade grinding devices exist, such as the one described in patent publication number CN210388547U, which includes a grinding wheel, a feeding mechanism, a power mechanism, a flipping mechanism, a discharging mechanism, a base plate, and a grinding mechanism, with the base plate fixedly mounted on the grinding wheel's worktable, the feeding mechanism comprising a feeding cylinder and a storage bin, and the discharging mechanism comprising a discharging cylinder fixing plate, a discharging cylinder, and a magnet, such equipment merely uses mechanical methods to flip the blade for automated grinding. It lacks precise distance measurement and positioning functions, making it difficult to guarantee consistent grinding accuracy.

[0004] Therefore, there is an urgent need for a specialized device that can automatically and accurately grind the inner arc R planer to improve the machining accuracy of the tool and thus effectively guarantee the quality of the welded pipe weld. Summary of the Invention

[0005] The purpose of this invention is to solve the problems of low precision in manual grinding and poor adaptability of automated equipment in the existing technology, and to provide an automatic grinding machine for the inner arc planer of high frequency welded pipe for refrigeration. It has the characteristics of high precision, high automation, environmental friendliness and wide applicability.

[0006] The above-mentioned technical problems of this utility model are mainly solved by the following technical solution: an automatic grinding machine for a high-frequency welded pipe inner arc planer for refrigeration, characterized in that: it includes a work cabinet with a worktable and a control console set on the work cabinet. The work cabinet is provided with a workpiece fixing frame, a flat grinding frame and an arc grinding frame, wherein the workpiece fixing frame moves along the X-axis and Y-axis, and the flat grinding frame and the arc grinding frame are respectively located at two workstations and move along their respective Z-axis; the flat grinding frame is provided with a first distance measuring and positioning device, and the arc grinding frame is provided with a second distance measuring and positioning device.

[0007] The aforementioned automatic grinding machine for high-frequency welded pipe inner arc planer for refrigeration further includes a diamond flat grinding wheel and a diamond arc grinding wheel respectively on the flat grinding frame and the arc grinding frame. Dust collection hoods are provided at both the diamond flat grinding wheel and the diamond arc grinding wheel. The dust collection hoods are connected to a dust collector through dust collection pipes.

[0008] The aforementioned automatic grinding machine for the inner arc planer of a high-frequency welded pipe for refrigeration further includes a control console comprising a touch screen operating interface, which works in conjunction with a PLC control system. The PLC control system is connected to the X-axis, Y-axis, and Z-axis servo motor drivers for controlling the grinding process according to preset parameters.

[0009] The aforementioned automatic grinding machine for the inner arc planer of a high-frequency welded pipe for refrigeration further includes a workpiece fixing frame with a tool holder slot and a set screw. The rightmost and front sides of the slot form positioning reference surfaces with the first ranging and positioning device, respectively.

[0010] In the aforementioned automatic grinding machine for the inner arc planer of a high-frequency welded pipe for refrigeration, the first and second ranging and positioning devices are contact displacement sensors or photoelectric sensors.

[0011] The aforementioned automatic grinding machine for the inner arc planer of a high-frequency welded pipe for refrigeration further includes dust covers on the moving distance sections of the X-axis, Y-axis, and Z-axis.

[0012] The aforementioned automatic grinding machine for the inner arc planer of a high-frequency welded pipe for refrigeration further includes a cabinet cabinet with a door and an electrical control system inside the cabinet.

[0013] The aforementioned automatic grinding machine for the inner arc planer of a high-frequency welded pipe for refrigeration further includes a work cabinet that is a movable cabinet.

[0014] This technical solution is based on a work cabinet with a work surface. The work cabinet has an openable cabinet door, an electrical control system is arranged inside the cabinet, and a sharpening device and a control console are arranged on the cabinet surface, so that the cabinet and the equipment are integrated into one unit. It adopts a mobile cabinet design to facilitate the handling and adjustment of the equipment.

[0015] The grinding device mainly consists of a workpiece holder and two stations—a surface grinding station and a circular grinding station. The two stations are arranged side by side and both cooperate with the workpiece holder, so that the planer can be ground in two processes, surface and circular, simply by adjusting the position of the workpiece holder. The workpiece holder has two movement directions, X and Y (horizontal), while the surface grinding station and the circular grinding station each have one movement direction, Z (vertical). This constitutes the motion support for the entire planer grinding process.

[0016] The control console of this device includes a PLC control system and a touch screen operating interface. The PLC control system is connected to the X, Y, and Z axis servo motor drivers and can automatically execute the grinding process according to preset parameters. The first and second ranging and positioning devices can use laser rangefinders or contact displacement sensors to achieve high-precision positioning.

[0017] Both grinding frames of this device are equipped with diamond grinding wheels. The circular arc R grinding wheel can be customized in size. Because of the high hardness of the diamond grinding wheel, the wheel does not need to be re-grinded. The circular arc shape is fixed, which ensures that the inner arc size and shape of the planer are consistent, thereby ensuring the quality of the outer weld of the high-frequency welded pipe for refrigeration and avoiding cracking of the welded pipe flaring.

[0018] This device features a dust collection hood at the grinding wheel location, connected to a dust collector via a dust collection pipe, making it environmentally friendly. Additionally, dust covers are installed along the X, Y, and Z axis travel distances to enhance equipment durability.

[0019] Compared with the prior art, the beneficial effects of this utility model are: adopting an XYZ three-axis linkage + dual-station grinding system to realize automatic positioning, distance measurement and grinding of the planer, improving processing accuracy and shape consistency; through diamond grinding wheels and PLC precise control, ensuring that the size and shape of the inner arc R meet the standard, avoiding errors caused by manual grinding; equipped with dust collection and dust prevention devices to extend the service life of the equipment and improve the working environment; applicable to the grinding of planer blades of different specifications, with strong versatility and high production efficiency. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of this utility model.

[0021] Figure 2 yes Figure 1 Top view.

[0022] Figure 3 yes Figure 1 A schematic diagram of the cabinet with the door closed.

[0023] Figure 4 yes Figure 1 The right view.

[0024] Figure 5 This is a schematic diagram of the working state of the surface grinding station of this utility model.

[0025] Figure 6 This is a schematic diagram of the working state of the circular arc R grinding station of this utility model.

[0026] Figure 7 This is the electrical control schematic diagram of the X / Y / Z axes of this utility model.

[0027] Figure 8This utility model presents electrical control schematic diagrams for two types of grinding machines.

[0028] In the diagram: 1-Work cabinet, 2-Control console, 3-First ranging and positioning device, 4-Surface grinding frame, 5-Circular arc grinding frame, 6-Second ranging and positioning device, 7-Dust collector, 8-X-axis, 9-Y-axis, 10-Workpiece fixing frame, 11-Surface grinding wheel, 12-Circular arc grinding wheel, 13-Planer, 14-Circular arc grinding Z-axis, 15-Surface grinding Z-axis. Detailed Implementation

[0029] The technical solution of this utility model will be further described in detail below through embodiments and in conjunction with the accompanying drawings.

[0030] See Figures 1 to 4 This embodiment describes an automatic grinding machine for the inner arc planer blade of a high-frequency welded pipe for refrigeration. It is equipped with a work cabinet 1 with a work surface and an openable cabinet door. The electrical control system is located inside the work cabinet, and a control console 2 is set on one side of the upper part of the work cabinet to facilitate human-machine interaction.

[0031] A workpiece holder 10, a surface grinding holder 4, and a circular arc grinding holder 5 are installed on the work cabinet 1.

[0032] The workpiece holder 10 can move along the mutually perpendicular X-axis 8 and Y-axis 9 on the worktable. This function is achieved by a horizontally arranged conventional slide rail, a slider assembly, a lead screw connecting the slider, and an X-axis servo motor and a Y-axis servo motor driving the lead screw, so that the workpiece holder 10 drives the planer 13 to complete the position adjustment of the two stations of surface grinding and arc grinding.

[0033] The surface grinding frame 4 and the circular arc grinding frame 5 are located at two different workstations and move along their respective Z-axis. This function is also achieved by vertically arranged conventional slide rails, slider assemblies, lead screws connecting the sliders, and grinding Z-axis motors and grinding RZ-axis motors driving the lead screws, so that the surface grinding frame 4 and the circular arc grinding frame 5 carry the surface grinding wheel 11 and the circular arc grinding wheel 12 respectively to move up and down to adjust the working point.

[0034] The control console 2 includes a touchscreen interface, which works in conjunction with a PLC control system. The PLC control system is connected to the servo motor drivers for the X-axis 8, Y-axis 9, and Z-axis to control the grinding process according to preset parameters. A first ranging and positioning device 3 is installed on the surface grinding head 4, and a second ranging and positioning device 6 is installed on the arc grinding head 5. The first ranging and positioning device 3 and the second ranging and positioning device 6 are contact displacement sensors or photoelectric sensors. The electrical control diagrams for the X-axis 8, Y-axis 9, arc grinding Z-axis 14, surface grinding Z-axis 15, and the grinding wheel are shown below. Figure 7 , Figure 8 As shown, the control system adopts a conventional setup, including a PLC controller, servo drivers, analog isolation modules, etc.

[0035] Furthermore, a diamond surface grinding wheel 11 and a diamond circular grinding wheel 12 are respectively installed on the surface grinding frame 4 and the circular grinding frame 5. Since the grinding wheels are detachable assemblies, the circular grinding wheel 12 is determined according to the arc size of different specifications of planer blades 13 to ensure that the arc size of the same planer blade 13 is consistent. Dust collection covers are provided at both the diamond surface grinding wheel 11 and the diamond circular grinding wheel 12, and the dust collection covers are connected to the dust collector 7 through dust collection pipes. At the same time, dust covers are provided at the movement distance sections of the X-axis 8, Y-axis 9, and the two Z-axis, and the dust covers can adopt a telescopic structure.

[0036] Furthermore, the workpiece holder 10 is equipped with an adjustable tool holder slot and a set screw. The rightmost and front sides of the slot form positioning reference surfaces with the first ranging and positioning device 3, respectively. When installing the planer 13, the rightmost and front sides of the slot are used as reference lines to ensure the clamping accuracy of the planer 13. The set screw is located on the right side of the tool holder slot to lock the planer 13 at multiple points.

[0037] In addition, the work cabinet 1 in this embodiment is a mobile cabinet. Because the whole device is small in size, the dust collector 7 is also a small mobile dust collector, which is connected and operated together with the cabinet.

[0038] Working principle and application:

[0039] In this embodiment, the planer 13 is held by the workpiece holder 10 and moves to the ranging station via the X / Y axes, where it is precisely positioned by a contact displacement sensor or photoelectric sensor. During step-by-step grinding, surface grinding is performed by a diamond surface grinding wheel 11 (controlled by the Z-axis 15 of the surface grinding wheel) grinding the cutting edge reference surface according to set parameters. During arc grinding, a diamond arc grinding wheel (controlled by the Z-axis 14 of the arc grinding wheel) automatically grinds a standard inner arc R, ensuring consistent curvature. Intelligent control is achieved by a PLC system that regulates the three-axis servo motors throughout the process based on input parameters, enabling fully automated operation. Dust protection: a dust collection hood and dustproof design ensure a clean processing environment and extend equipment life. This device replaces manual experience-based operation and solves the weld quality problems caused by irregular curvature of traditional planer blades through high-precision mechatronic control.

[0040] When using, first press the "Load Tool / Start" button on the control panel 2 and wait for all motors to return to their positions; then load the tool: place the planer 13 into the tool holder slot of the workpiece holder 10, with the tool face up, and push it to the right so that the right side of the planer 13 is close to the right side of the slot. Then push the planer 13 forward so that the front end of the planer 13 is close to the distance measuring and positioning device 1. Then tighten the front screw of the workpiece holder 10, then tighten the rear screw, and repeatedly tighten the front and rear screws.

[0041] Parameter Adjustment: ① Grinding radius (R) total: 1.7mm. Adjustment steps: Click the value box for the total grinding radius on the touchscreen. A dialog box will pop up. Enter the desired value and click OK. ② Grinding flat total: 1.10mm. Click the value box for the total grinding flat total on the touchscreen. A dialog box will pop up. Enter the desired value and click OK. Make sure the bottom right corner of the touchscreen displays "Grinding Flat".

[0042] Next, press the "Load Tool / Start" button on the operation panel. The PLC of the automatic grinding machine receives the start signal, which is processed by the CPU. The signal is then transmitted to the drivers of the X and Y axis servo motors. The X and Y axis servo motors send the planer 13 to the R distance measuring position for distance measurement. After the distance measurement is completed, it is sent to the surface grinder. The Z axis 15 servo motor of the surface grinder starts working, and the driver executes according to the set parameters. After the Z axis servo motor finishes, the X and Y axis servo motors send the planer to the R distance measuring position again. After the distance measurement is completed, it is sent to the R grinding station. The R grinding station begins grinding, and the R grinding servo motor driver executes according to the set parameters. After the R grinding is completed, the X, Y, and Z axis servo motors automatically reset. Manually loosen the set screws and remove the planer.

[0043] The above embodiments are illustrative of the present invention and not intended to limit it. Although the present invention has been described in conjunction with preferred embodiments, it should be understood that the present invention is not limited to the preferred embodiments. Those skilled in the art can make various equivalent modifications and substitutions to the technical solutions of the present invention based on its teachings. Therefore, the scope of the present invention should be defined by the claims, and all such equivalent modifications and substitutions fall within the protection scope of the present invention.

Claims

1. An automatic grinding machine for an inner arc planer blade used in refrigeration high-frequency welded pipes, characterized in that: It includes a work cabinet (1) with a work surface and a control console (2) set on the work cabinet. The work cabinet is equipped with a workpiece fixing frame (10), a surface grinding frame (4) and a circular arc grinding frame (5). The workpiece fixing frame moves along the X-axis (8) and Y-axis (9). The surface grinding frame and the circular arc grinding frame are located at two workstations and move along their respective Z-axis. The surface grinding frame is equipped with a first distance measuring and positioning device (3), and the circular arc grinding frame is equipped with a second distance measuring and positioning device (6).

2. The automatic grinding machine for the inner arc planer tool of high-frequency welded tube for refrigeration according to claim 1, characterized in that, The flat grinding frame (4) and the circular arc grinding frame (5) are respectively equipped with a diamond flat grinding wheel (11) and a diamond circular arc grinding wheel (12). Dust collection covers are provided at both the diamond flat grinding wheel and the diamond circular arc grinding wheel. The dust collection covers are connected to the dust collector (7) through dust collection pipes.

3. The automatic grinding machine for the inner arc planer tool of high-frequency welded tube for refrigeration according to claim 1, characterized in that, The console (2) includes a touch screen operation interface, which works in conjunction with the PLC control system. The PLC control system is connected to the X-axis, Y-axis and Z-axis servo motor driver signals and is used to control the grinding process according to preset parameters.

4. The automatic grinding machine for the inner arc planer tool of high-frequency welded tube for refrigeration according to claim 1, characterized in that, The workpiece holder (10) is provided with a tool holder slot and a set screw. The rightmost and front sides of the slot form a positioning reference surface with the first ranging and positioning device (3).

5. The automatic grinding machine for the inner arc planer blade of a high-frequency welded pipe for refrigeration according to claim 1, characterized in that, The first ranging and positioning device (3) and the second ranging and positioning device (6) are contact displacement sensors or photoelectric sensors.

6. The automatic grinding machine for the inner arc planer tool of high frequency welded tube for refrigeration according to claim 1, characterized in that, The X-axis (8), Y-axis (9), and Z-axis travel distance segments are all equipped with dust covers.

7. The automatic grinding machine for the inner arc planer tool of high frequency welded tube for refrigeration according to claim 1, characterized in that, The work cabinet (1) is equipped with a cabinet door and an electrical control system is installed inside the work cabinet.

8. The automatic grinding machine for the inner arc planer tool of high-frequency welded tube for refrigeration according to claim 1, characterized in that, The work cabinet (1) is a movable cabinet.

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