A gantry grinder

Abstract

This application relates to a gantry grinding machine for grinding the surface of a workpiece. The gantry grinding machine includes a bed; a worktable slidably disposed on the bed, the worktable surface for placing the workpiece; a gantry motion assembly disposed on the bed; and a grinding assembly including multiple grinding wheels, the multiple grinding wheels being movably disposed on the final moving end of the gantry motion assembly. This movability allows the position of the grinding wheels to have both a machining position and a storage position. This invention, by employing multiple grinding wheels movably disposed on the final moving end of the gantry motion assembly, allows the multiple grinding wheels to be switched to the corresponding grinding wheel during grinding operations. The switching between machining and storage positions enables flexible adaptation to different workpieces or different processing requirements of the same workpiece.

Description

Technical Field

[0001] This application relates to the field of grinding machine technology, and in particular to a gantry grinding machine. Background Technology

[0002] A grinding machine is a machine tool that uses grinding wheels to grind the surface of a workpiece. Among them, gantry grinding machines specifically refer to gantry surface grinding machines, that is, surface grinding machines that adopt a gantry structure.

[0003] In current technology, the working principle of a gantry grinding machine is as follows: The gantry grinding machine uses a gantry frame composed of columns and beams as a rigid support foundation. During operation, a large workpiece to be processed is first firmly clamped onto the worktable of the bed guide rail using pressure plates, fixtures, or electromagnetic chucks, and the machining origin is accurately positioned. Then, under the control of the CNC system, the high-speed rotating grinding head (driven by the grinding wheel spindle, which is the main motion) and the workpiece achieve multi-axis coordinated feed motion. The worktable feeds longitudinally along the bed, and the gantry motion assembly feeds laterally along the bed to cover the length and width range of the workpiece. The gantry motion assembly allows the grinding head to feed vertically to control the grinding depth. Excess material is removed by micro-cutting of the workpiece surface by the abrasive grains on the grinding wheel surface. At the same time, the cooling system sprays coolant to reduce the grinding temperature and removes grinding chips to prevent the workpiece from being burned or scratched. Finally, high-precision grinding of the workpiece surface is achieved.

[0004] In actual use, a gantry grinding machine is usually equipped with only one grinding wheel. The surface of the same workpiece needs to be ground multiple times using different types of grinding wheels to achieve the required surface finish. At this time, the operator has to change the grinding wheel multiple times to complete the grinding workpiece, which is a rather cumbersome process.

[0005] Therefore, in order to solve the problems in the prior art, this application provides a gantry grinding machine. Utility Model Content

[0006] The purpose of this utility model embodiment is to provide a gantry grinding machine to solve the problems of the limited number of grinding wheels in the existing gantry grinding machine and the cumbersome process of replacing grinding wheels.

[0007] To solve the above problems, the technical solution of this utility model embodiment is as follows: This utility model provides a gantry grinding machine, including a bed; a worktable slidably disposed on the bed, the worktable surface for placing workpieces; a gantry motion assembly disposed on the bed; and a grinding assembly including multiple grinding wheels, the multiple grinding wheels being movably disposed on the final moving end of the gantry motion assembly, the movability being used to enable the position of the grinding wheels to have a processing position and a storage position.

[0008] Furthermore, in a preferred embodiment, the grinding assembly further includes a grinding wheel and a wheel adjustment drive. The grinding wheel is rotatably mounted on the final moving end of the gantry motion assembly, and the rotation axis of the grinding wheel is parallel to the table surface. A plurality of grinding wheels are circumferentially distributed around the rotation axis of the grinding wheel. The wheel adjustment drive is mounted on the final moving end of the gantry motion assembly and is connected to the grinding wheel.

[0009] Furthermore, in a preferred embodiment, the adjustment drive is a CNC rotary table.

[0010] Furthermore, in a preferred embodiment, a connecting shaft is provided between the grinding wheel and the grinding wheel disk. The connecting shaft is rotatably mounted on the grinding wheel disk and is used to fix the grinding wheel. The grinding assembly includes a grinding wheel motor, which is mounted on the final moving end of the gantry motion assembly. The output shaft of the grinding wheel motor is switchably connected to the connecting shaft. This switchable connection allows the output shaft of the grinding wheel motor to drive the connecting shaft to rotate when the grinding wheel is in the machining position, and the output of the grinding wheel motor to be separated from the connecting shaft when the grinding wheel is in the storage position.

[0011] Furthermore, in a preferred embodiment, the connecting shaft is disposed through the grinding wheel, one end of the connecting shaft is connected to the grinding wheel, and the other end face is provided with a drive groove with a non-circular cross-section; the grinding assembly also includes a drive block and a switching cylinder, the drive block is connected to the output shaft of the grinding wheel motor, and the drive block is shaped to fit the drive groove; the switching cylinder is disposed on the final moving end of the gantry motion assembly, and the piston rod of the switching cylinder is connected to the grinding wheel motor for sliding the drive block in and out of the drive groove.

[0012] Furthermore, in some preferred embodiments, the grinding wheel is provided with positioning sensors, one positioning sensor corresponding to one grinding wheel; a positioning sensor is provided at the final moving end of the gantry motion assembly, the positioning sensor cooperating with the positioning sensors to determine whether the grinding wheel is in the machining position.

[0013] Furthermore, in a preferred embodiment, the grinding wheel and the turntable of the grinding wheel adjustment drive are connected by a detachable transmission connection. The detachable transmission connection allows the grinding wheel to have a working position and an operating position. In the working position, the grinding wheel is located above the area of ​​the working table, and the grinding wheel is connected to the grinding wheel adjustment drive. In the operating position, the grinding wheel is located above the area outside the working table, and the grinding wheel is disconnected from the grinding wheel adjustment drive.

[0014] Furthermore, in a preferred embodiment, the turntable of the adjusting drive has a central cavity, in which a shifting cylinder is provided. The housing of the shifting cylinder is fixedly connected to the final moving end of the gantry motion assembly. The piston rod of the shifting cylinder is rotatably connected to the grinding wheel, and the extension and retraction direction of the piston rod is parallel to the rotation axis of the grinding wheel. The grinding wheel and the adjusting drive are engaged.

[0015] Compared with the prior art, the gantry grinding machine provided by this utility model embodiment has the following advantages: by using multiple grinding wheels, and these grinding wheels are movably arranged on the final moving end of the gantry motion assembly, the multiple grinding wheels can be switched to the corresponding grinding wheel during grinding work. The grinding wheels are switched by switching between the processing position and the storage position, thereby realizing flexible adaptation to different workpieces or different processing requirements of the same workpiece. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0017] Figure 2 This is a partial structural schematic diagram of the present invention.

[0018] Figure 3 This is a partial structural schematic diagram of the present invention.

[0019] Figure 4 This is a partial structural schematic diagram of the present invention.

[0020] Figure 5 This is a partial structural schematic diagram of the present invention.

[0021] Explanation of reference numerals in the attached drawings: 1. Bed; 2. Worktable; 3. Gantry motion assembly; 4. Grinding assembly; 41. Grinding wheel; 42. Grinding wheel disc; 43. Disc adjustment drive component; 431. Central cavity; 44. Grinding wheel motor; 45. Drive block; 46. Switching cylinder; 5. Connecting shaft; 51. Drive slot; 6. Positioning sensor plate; 7. Positioning sensor; 8. Table shifting cylinder. Detailed Implementation

[0022] The term "embodiment" as used herein means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of the invention. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0023] The following is in conjunction with the appendix Figure 1-5 This application will be described in further detail.

[0024] This utility model embodiment provides a gantry grinding machine.

[0025] Reference Figure 1 This utility model embodiment provides a gantry grinding machine including a bed 1, a worktable 2, a gantry motion assembly 3, and a grinding assembly 4. Specifically, the bed 1 serves as the mounting base for this device and is typically placed on a level ground; the worktable 2 is slidably mounted on the bed 1, and the table surface of the worktable 2 is used for placing workpieces. In order to securely place the workpieces, the worktable 2 has a structure for fixing the workpieces. Since gantry grinding machines typically grind planar workpieces, an electromagnetic chuck is installed on the workpiece table to accommodate magnetic metal workpieces, which firmly attract the workpieces to the worktable 2 through strong magnetic force. To accommodate non-magnetic workpieces, the worktable 2 is equipped with a special tooling fixture to stably fix the workpieces on the worktable 2.

[0026] The gantry motion assembly 3 is mounted on the bed 1. The gantry motion assembly 3 is the core structure of the gantry grinding machine. The gantry motion assembly 3 includes two columns, a crossbeam, and a drive system mounted on the crossbeam. The upper ends of the two columns support the crossbeam, which is used to mount the grinding assembly 4. The drive system in the gantry motion assembly 3 is used to drive the grinding assembly 4 to perform vertical and horizontal feed.

[0027] The grinding assembly 4 includes multiple grinding wheels 41, which are movably mounted on the final moving end of the gantry motion assembly 3. The purpose of mounting them on the final moving end is to allow the grinding wheels 41 to perform both vertical and horizontal feeds, while the purpose of moving them is to ensure that the position of the grinding wheels 41 has both a processing position and a storage position.

[0028] In a gantry grinding machine, the workpiece typically undergoes three grinding processes: rough grinding, fine grinding, and polishing. Different types of grinding wheels are used for each process, so multiple grinding wheels 41 of different specifications are provided to facilitate multiple grinding operations. Regarding the aforementioned processing and storage positions, since multiple grinding wheels 41 are used, when one grinding wheel 41 is grinding the workpiece, that position is the processing position. Meanwhile, the positions corresponding to the other grinding wheels 41 that are not involved in the grinding process are the storage positions.

[0029] In summary, by employing multiple grinding wheels 41, which are movably mounted on the final moving end of the gantry motion assembly 3, the multiple grinding wheels 41 can be switched to the corresponding grinding wheel 41 during grinding operations. The grinding wheels 41 are switched by switching between the processing position and the storage position, thereby achieving flexible adaptation to different processing requirements.

[0030] Reference Figure 1-2 As mentioned above, switching different grinding wheels 41 to the working position or the storage position can adapt to different processing requirements. In this embodiment, the grinding assembly 4 also includes a grinding wheel disk 42 and a disk adjustment drive 43 to achieve the switching of multiple grinding wheels 41 to the working position and the storage position. Specifically, the grinding wheel disk 42 is rotatably mounted on the final moving end of the gantry motion assembly 3. The rotation axis of the grinding wheel disk 42 is parallel to the table surface of the worktable 2. Multiple grinding wheels 41 are evenly distributed in a circle around the rotation axis of the grinding wheel disk 42. The disk adjustment drive 43 is mounted on the final moving end of the gantry motion assembly 3 and is connected to the grinding wheel disk 42. The disk adjustment drive 43 drives the grinding wheel disk 42 to rotate, thereby realizing the switching of multiple grinding wheels 41 between the processing position and the storage position.

[0031] Furthermore, the grinding wheel disk 42 is rotated by the adjustment drive component 43 to switch multiple grinding wheels 41 between the machining position and the storage position. Considering that the rotation angle of the grinding wheel disk 42 needs to be precisely controlled to achieve accurate switching between the multiple grinding wheels 41 between the machining position and the storage position, the adjustment drive component 43 preferably adopts a CNC rotary table. Specifically, the CNC rotary table is the core component of the CNC machine tool. It achieves high-precision rotational positioning through the CNC system, ensuring that after the grinding wheel disk 42 rotates, the target grinding wheel 41 can accurately stop at the machining position, thereby meeting the requirements of high-precision machining. Moreover, when the grinding wheel 41 is subjected to grinding resistance, the grinding wheel 41 will also remain stably in the machining position.

[0032] As mentioned above, the high-precision rotation of the CNC rotary table causes the grinding wheel disk 42 to rotate, thereby enabling the switching of multiple grinding wheels 41 between the processing position and the storage position. When the grinding wheel 41 grinds the workpiece, the grinding wheel 41 usually needs to rotate at high speed to contact the workpiece surface in order to complete the grinding work.

[0033] Reference Figure 2-3Furthermore, based on the switching of the position of the grinding wheel 41, in order to ensure that the grinding wheel 41 can rotate stably during processing to complete the grinding operation through a simple structure, the following configuration is adopted: each grinding wheel 41 is connected to the grinding wheel disk 42 through a connecting shaft 5. The connecting shaft 5 is rotatably mounted on the grinding wheel disk 42 through bearings, and the grinding wheel 41 is fixedly sleeved on the connecting shaft 5. Meanwhile, the grinding assembly 4 also includes a grinding wheel motor 44. There is only one grinding wheel motor 44, which is located on the final moving end of the gantry motion assembly 3. That is, the grinding wheel motor 44 does not rotate with the grinding wheel disk 42. The output shaft of the grinding wheel motor 44 and the connecting shaft 5 are connected by a switchable transmission. There are two situations where the switchable transmission connection is used. For example, when the grinding wheel 41 is in the processing position, the output shaft of the grinding wheel motor 44 is connected to the connecting shaft 5, driving the connecting shaft 5 and the grinding wheel 41 to rotate. Or, when the grinding wheel 41 is in the storage position, the output shaft of the grinding wheel motor 44 is not connected to the connecting shaft 5.

[0034] Reference Figure 2-3 Furthermore, in order to more easily realize the switchable transmission connection, the following configuration is provided: the connecting shaft 5 is installed through the grinding wheel 42, one end of the connecting shaft 5 is connected to the grinding wheel 41, and the other end face is provided with a drive groove 51 with a non-circular cross section (such as a regular hexagon).

[0035] Meanwhile, the grinding assembly 4 also includes a drive block 45 and a switching cylinder 46. The drive block 45 is connected to the output shaft of the grinding wheel motor 44. The drive block 45 is adapted to the drive groove 51. For example, the drive block 45 is in the shape of a regular hexagonal prism. The cylinder body of the switching cylinder 46 is fixed on the final moving end of the gantry motion assembly 3. The piston rod of the switching cylinder 46 is connected to the housing of the grinding wheel motor 44. The extension and retraction direction of the piston rod of the switching cylinder 46 is parallel to the axis of the connecting shaft 5.

[0036] Specifically, when power needs to be connected, the switching cylinder 46 pushes the grinding wheel motor 44 to move, so that the drive block 45 is inserted into the drive groove 51 to realize transmission; when power needs to be disconnected, the switching cylinder 46 pulls the grinding wheel motor 44 to reset, and the drive block 45 is disengaged from the drive groove 51; at the same time, when the grinding wheel disk 42 rotates, the grinding wheel motor 44 will not interfere with the rotation of the grinding wheel disk 42.

[0037] Reference Figure 2-4As mentioned above, the grinding wheel motor 44 is connected to or disconnected from the grinding wheel 41 by setting a switching cylinder 46. When connecting the grinding wheel 41, how to determine that the grinding wheel 41 is accurately in the machining position during the switching position? Furthermore, a positioning sensor 6 is provided on the grinding wheel disk 42 at the position corresponding to each grinding wheel 41, and a positioning sensor 7 is installed at the corresponding position of the final moving end of the gantry motion assembly 3. The positioning sensor 6 can be a thin metal sheet, and the positioning sensor 7 can be a slotted photoelectric sensor.

[0038] Specifically, when the grinding wheel disk 42 rotates to a certain grinding wheel 41 in the processing position, the positioning sensor 6 corresponding to the grinding wheel 41 will align with the positioning sensor 7, and the positioning sensor 7 will then send a signal to control the adjustment drive component 43 to stop operating, ensuring that the grinding wheel 41 is in an accurate position.

[0039] Since the number of grinding wheels 41 installed on the grinding wheel disk 42 is limited, it is usually necessary to replace the grinding wheels 41 on the grinding wheel disk 42 according to processing requirements. During replacement, the gantry motion assembly 3 moves the grinding assembly 4 as close as possible to the edge of the bed 1, but there is still not enough space for the operator. Based on this, the following configuration is adopted: a detachable transmission connection is used between the grinding wheel disk 42 and the adjustment drive 43, allowing the grinding wheel disk 42 to switch between the working position and the operating position. The working position refers to the area where the grinding wheel disk 42 is located within the bed 1, while the operating position refers to the area outside the bed 1. The operating position is where the operator operates the gantry grinder. It should also be noted that in the working position, the grinding wheel disk 42 must maintain a transmission connection with the adjustment drive 43 to perform grinding normally. In the operating position, the grinding wheel disk 42 is disconnected from the adjustment drive 43 to provide a safe operating environment.

[0040] Reference Figure 2 and Figure 4-5 Furthermore, in order to achieve this detachable transmission connection, the turntable of the adjustment drive component 43 is provided with a central cavity 431. This central cavity 431 is built into the adjustment drive component 43, that is, the adjustment drive component 43 will use a hollow CNC rotary table. A shift cylinder 8 is installed in the central cavity 431. The housing of the shift cylinder 8 is fixedly connected to the final moving end of the gantry motion component 3. The piston rod end of the shift cylinder 8 is rotatably connected to the grinding wheel 42 through a bearing. The extension and retraction direction of the piston rod of the shift cylinder 8 is parallel to the rotation axis of the grinding wheel 42, so that the grinding wheel 42 can move closer to or away from the adjustment drive component 43 through the shift cylinder 8.

[0041] Meanwhile, the grinding wheel 42 and the turntable of the adjusting wheel drive 43 are meshed together to realize the transmission connection and disconnection between the grinding wheel 42 and the turntable of the adjusting wheel drive 43. Specifically, a slot can be opened on the grinding wheel 42, and a block can be connected to the turntable of the adjusting wheel drive 43. This block can be inserted into the slot, thus realizing the transmission between the adjusting wheel drive 43 and the grinding wheel 42. This block can also be removed from the slot, thus realizing the disconnection between the adjusting wheel drive 43 and the grinding wheel 42.

[0042] Specifically, when the piston rod of the shift cylinder 8 extends, it pushes the grinding wheel 42 to the operating position, making it convenient for the operator to replace and repair the grinding wheel 41, etc. When the piston rod retracts, the grinding wheel 42 is in the working position. The grinding wheel 42 and the turntable are engaged through the block groove cooperation, so that the adjustment drive component 43 can normally drive the grinding wheel 42 to rotate.

[0043] In summary, this gantry grinding machine, by employing a grinding wheel disc 42 that can switch grinding wheels 41 and multiple grinding wheels 41, not only achieves rapid and precise switching of multiple grinding wheels 41 to meet the grinding needs of different workpieces, but also facilitates the maintenance and replacement of grinding wheels through a detachable table structure, thereby improving the overall processing efficiency and ease of operation of the equipment, and making it suitable for grinding processing scenarios of various complex workpieces.

[0044] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A gantry grinding machine, characterized in that, include: Bed frame (1); The worktable (2) is slidably mounted on the bed (1), and the worktable (2) is used for placing workpieces. The gantry motion assembly (3) is mounted on the bed (1); The grinding assembly (4) includes multiple grinding wheels (41). The multiple grinding wheels (41) are movably disposed on the final moving end of the gantry motion assembly (3). When one of the grinding wheels (41) grinds the workpiece, the position of the grinding wheel (41) is the processing position, and the positions corresponding to the other grinding wheels (41) that do not participate in the grinding work are the storage positions. The grinding assembly (4) further includes a grinding wheel (42) and a wheel adjustment drive (43). The grinding wheel (42) is rotatably mounted on the final moving end of the gantry motion assembly (3). The rotation axis of the grinding wheel (42) is parallel to the table surface of the worktable (2). A plurality of grinding wheels (41) are circumferentially distributed around the rotation axis of the grinding wheel (42). The wheel adjustment drive (43) is mounted on the final moving end of the gantry motion assembly (3) and is connected to the grinding wheel (42). The adjustment drive component (43) is a CNC rotary table; A connecting shaft (5) is provided between the grinding wheel (41) and the grinding wheel disk (42). The connecting shaft (5) is rotatably mounted on the grinding wheel disk (42) and the grinding wheel (41) is fixedly sleeved on the connecting shaft (5). The grinding assembly (4) includes a grinding wheel motor (44). The grinding wheel motor (44) is mounted on the final moving end of the gantry motion assembly (3). The output shaft of the grinding wheel motor (44) is switchably connected to the connecting shaft (5). The switchable transmission connection is used so that when the grinding wheel (41) is in the processing position, the output shaft of the grinding wheel motor (44) drives the connecting shaft (5) to rotate. When the grinding wheel (41) is in the storage position, the output of the grinding wheel motor (44) is separated from the connecting shaft (5). The connecting shaft (5) is disposed through the grinding wheel (42). One end of the connecting shaft (5) is connected to the grinding wheel (41), and the other end face is provided with a drive groove (51) with a non-circular cross section. The grinding assembly (4) also includes a drive block (45) and a switching cylinder (46). The drive block (45) is connected to the output shaft of the grinding wheel motor (44), and the drive block (45) is shaped to match the drive groove (51). The switching cylinder (46) is disposed on the final moving end of the gantry motion assembly (3). The piston rod of the switching cylinder (46) is connected to the grinding wheel motor (44) and is used to make the drive block (45) slide in and out of the drive groove (51).

2. The gantry grinding machine according to claim 1, characterized in that: The grinding wheel disc (42) is provided with a positioning sensor (6), one positioning sensor (6) corresponds to one grinding wheel (41); a positioning sensor (7) is provided at the final moving end of the gantry motion assembly (3), the positioning sensor (7) cooperates with the positioning sensor (6) to determine whether the grinding wheel (41) is in the processing position.

3. A gantry grinding machine according to claim 1, characterized in that: The grinding wheel (42) and the rotary table of the adjustment drive (43) are connected by a detachable transmission connection. The detachable transmission connection is used to give the grinding wheel (42) a working position and an operating position. In the working position, the grinding wheel (42) is located above the area of ​​the bed (1) and is connected to the adjustment drive (43). In the operating position, the grinding wheel (42) is located above the area outside the bed (1) and is disconnected from the adjustment drive (43).

4. A gantry grinding machine according to claim 3, characterized in that: The turntable of the adjustment drive (43) has a central cavity (431), and a shift cylinder (8) is provided in the central cavity (431). The housing of the shift cylinder (8) is fixedly connected to the final moving end of the gantry motion assembly (3). The piston rod of the shift cylinder (8) is rotatably connected to the grinding wheel (42). The extension and retraction direction of the piston rod of the shift cylinder (8) is parallel to the rotation axis of the grinding wheel (42). The grinding wheel (42) and the adjustment drive (43) are meshed together.

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