A protection device of a numerical control machining center and the machining center

Abstract

The utility model discloses a kind of protective devices of numerical control machining center and machining center with the protective device, wherein protective device includes protective wall and protective door, observation window is provided on protective door, and protective net is slidably installed on the groove of observation window side edge, and the protective area of protective net covers toughened glass plate, and the inside of protective door is provided with the chamber containing protective net;Buckle lock is provided between the upper portion of protective net and observation window;The inside of protective door is provided with cleaning scraper, and the inner surface of toughened glass plate of observation window is contacted with cleaning scraper, and cleaning handle is connected on cleaning scraper.In machining process, if unexpected situation such as workpiece or tool fly out occurs, protective net can block the tool or workpiece that fly out, prevent workpiece or tool from accidentally flying out and endangering operator;When needing to observe the processing state of workpiece in machining process in detail, protective net can be pulled down, to avoid that protective net affects observation.

Description

Technical Field

[0001] This utility model belongs to the technical field of CNC machining centers, specifically a protective device for CNC machining centers and a machining center. Background Technology

[0002] CNC machining centers are highly efficient automated machine tools controlled by CNC systems. They evolved from CNC milling machines and are equipped with tool magazines and automatic tool changers to perform multi-process machining. A single workpiece clamping can complete composite machining such as milling, drilling, and tapping, with a machining efficiency 5 to 10 times that of ordinary equipment. They are especially suitable for single-piece or small-batch multi-variety production with complex shapes and high precision requirements.

[0003] To prevent metal shavings from flying out during machining, most CNC machining centers are equipped with protective devices. For example, Chinese utility model patent CN215237886U discloses a protective device for high-precision CNC machining centers, including a protective cover with a rectangular opening on its surface. A crossbar is fixedly connected to the end of the protective cover, and a groove is formed on the upper surface of the crossbar. Two sliding doors are installed on the protective cover, covering the rectangular opening. Each sliding door has a locking block fixedly connected to its upper end. In use, the protective cover is installed on a CNC lathe. By turning the turntable, the round rod rotates, which in turn drives the gear to rotate. Since the gear meshes with two racks, the rotation of the gear causes the two racks to move closer or further apart. This movement of the racks causes the two sliding doors to move closer or further apart. The sliding doors are connected to the groove by a slider, ensuring relatively stable movement of the two sliding doors and preventing them from detaching from the crossbar.

[0004] However, existing protective devices for CNC machining centers still have some shortcomings in use. These include coolant and metal shavings generated during machining flying onto the glass of the observation window, affecting the operator's observation of the workpiece's machining status while the equipment is in the process of machining; the operator cannot open the door to handle these shavings, thus affecting the operator's real-time viewing; and in some extreme cases, when the tool or workpiece flies out due to clamping failure, it may shatter the glass of the observation window, endangering the operator's personal safety. Utility Model Content

[0005] This utility model proposes a protective device and machining center for CNC machining centers, aiming to solve the problems of existing protective devices for CNC machining centers having limited protective effects in extreme situations such as the observation window glass being difficult to clean and affecting observation, and the workpiece or tool flying out.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: This utility model first proposes a protective device for a CNC machining center, including a protective wall. A pair of protective doors are slidably installed at the front end of the protective wall via a slide rail. An observation window is provided on the protective door, and a tempered glass plate is installed on the observation window. A sliding groove is provided on the side of the observation window, and a protective net is slidably installed on the sliding groove. The protective area of ​​the protective net covers the tempered glass plate. A chamber for accommodating the protective net is provided inside the protective door. A latching lock is provided between the upper part of the protective net and the observation window. The protective door is equipped with a cleaning scraper inside, which contacts the inner surface of the tempered glass plate. A cleaning handle is connected to the cleaning scraper, which extends out of the protective door through a slot.

[0007] Preferably, the cleaning scraper is fixedly mounted on the mounting rod, and sliding blocks are connected to both ends of the mounting rod. The sliding blocks are slidably connected to the protective door through dovetail grooves.

[0008] Preferably, the sliding block is provided with an elongated hole, and the two ends of the mounting rod extend into the elongated holes of the two sliding blocks respectively. A compression spring is connected between the inner wall of the elongated hole away from the protective door and the mounting rod.

[0009] Preferably, the latching device includes a cylindrical latch installed on the top of the protective net and an elastic latch installed on the upper part of the observation window. The elastic latch is provided with an Ω-shaped opening. When the top of the protective net slides to the top edge of the observation window, the cylindrical latch engages in the Ω-shaped opening of the elastic latch.

[0010] Preferably, an electromagnetic lock is provided between the two protective doors. The electromagnetic lock includes a first electromagnet installed inside one of the protective doors, and a permanent magnet installed on the other protective door at a position corresponding to the first electromagnet. A locking button and an unlocking button are installed on the door handle of the protective door. Both the unlocking button and the locking button are electrically connected to the first electromagnet. The locking button is used to connect the electromagnet to the power supply, and the unlocking button is used to change the direction of the magnetic field of the first electromagnet.

[0011] Preferably, the device further includes a protective door retainer, on which a second electromagnet and a reset button are installed. A soft magnetic block is installed on the protective door. The reset button and the unlock button are both electrically connected to the second electromagnet. The unlock button is used to connect the second electromagnet to the power supply, and the reset button is used to disconnect the power supply to the second electromagnet.

[0012] In addition, this utility model also proposes a machining center equipped with the above-mentioned protective device.

[0013] Beneficial effects: Compared with the prior art, the present invention can achieve at least the following technical effects: 1. This utility model has a protective net that can slide up and down on the protective door. In the event of an accident such as the workpiece or tool flying out during the processing, the protective net can block the flying tool or workpiece, preventing the workpiece or tool from accidentally flying out and endangering the operator. When it is necessary to observe the processing status of the workpiece in detail during the processing, the protective net can be pulled down to avoid the protective net from affecting the observation.

[0014] 2. This utility model has a cleaning scraper on the inner side of the observation window glass plate. The glass plate can be cleaned by pulling the handle on the outside of the protective door, so as to avoid metal debris or coolant adhering to the glass plate and affecting the observation.

[0015] 3. This utility model also includes an electromagnetic lock, which uses an electromagnet and a permanent magnet to lock the protective door, preventing the protective door from being accidentally opened or not properly closed during processing.

[0016] 4. This utility model is equipped with a protective door retainer and a soft magnetic stop, which are linked with the electromagnetic door lock of the protective door. This effectively prevents the protective door from accidentally closing and causing pinching injuries when operators open the door to fix or remove workpieces. This further improves safety. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of the protective device of this utility model.

[0018] Figure 2 This is a schematic diagram of the protective door structure of this utility model.

[0019] Figure 3 This is a schematic diagram of the cleaning scraper structure of this utility model.

[0020] Figure 4 This utility model Figure 3 Enlarged view of point A in the middle.

[0021] Figure 5 This is a schematic diagram of the buckle lock structure of this utility model.

[0022] Figure 6 This is a schematic diagram of the electromagnetic lock structure of this utility model.

[0023] Figure 7 This is a schematic diagram of a machining center equipped with the protective device of this utility model.

[0024] In the diagram: 1. Protective wall; 2. Protective door; 3. Tempered glass plate; 4. Protective door fastener; 5. Second electromagnet; 6. Observation window; 7. Reset button; 8. Protective net; 9. Door handle; 10. Locking button; 11. Unlocking button; 12. First electromagnet; 13. Slot; 14. Cleaning handle; 15. Cleaning scraper; 16. Mounting rod; 17. Sliding block; 18. Elongated hole; 19. Compression spring; 20. Indicator light; 21. Soft magnetic stop; 22. Cylindrical latch; 23. Elastic latch; 24. Slide groove; 25. Permanent magnet. Detailed Implementation

[0025] The present invention will be further explained below with reference to specific implementation examples.

[0026] Please see Figure 1-6 This utility model first proposes a protective device for a CNC machining center. It includes a protective wall 1, with a pair of protective doors 2 slidably mounted on the front end of the protective wall 1 via a slide rail. Each protective door 2 has an observation window 6, on which a tempered glass plate 3 is mounted. A sliding groove 24 is provided on the side of the observation window 6, on which a protective net 8 is slidably mounted. The protective area of ​​the protective net 8 covers the tempered glass plate 3. The interior of the protective door 2 has a chamber to accommodate the protective net 8. A latching lock is provided between the upper part of the protective net 8 and the observation window 6. The protective door 2 is equipped with a cleaning scraper 15 inside. The cleaning scraper 15 is in contact with the inner surface of the tempered glass plate 3. A cleaning handle 14 is connected to the cleaning scraper 15. The cleaning handle 14 extends out of the protective door 2 through the slot 13 of the protective door 2.

[0027] The overall structure of the protective device of this utility model is as follows: Figure 1 As shown, a pair of protective doors 2 are in the form of double-opening sliding doors. The protective doors 2 are slidably connected to the protective wall 1 by pulleys or sliders. The protective wall 1 can be set as a hollow structure. When the protective doors 2 are opened, they are stored in the cavity of the protective wall 1.

[0028] The observation window 6 facilitates observation of the workpiece's processing status during the processing. During processing, the top of the protective net 8 is pulled up to the upper edge of the observation window 6 and fixed to the upper edge of the observation window 6 by a buckle lock to prevent the workpiece or tool from accidentally flying out and breaking the tempered glass plate, endangering the personal safety of the operator.

[0029] like Figure 1 , Figure 2 As shown, during the processing, when it is necessary to observe the processing status of the workpiece in detail, the protective net 8 can be pulled down and stored inside the cavity of the protective door 2. This prevents the protective net 8 from obstructing the observation.

[0030] Among them, the protective net 8 is made of heavy steel mesh with a wire diameter of 4.0~6.0mm and a mesh size of 20×20mm or 30×30mm.

[0031] like Figure 2 , Figure 3 As shown, in order to avoid metal debris or coolant adhering to the inner side of the tempered glass plate 3 and affecting observation, this utility model provides a cleaning scraper 15 on the inner side of the tempered glass plate 3. By pulling the cleaning handle 14 on the outer side of the protective door 2 up and down, the cleaning scraper 15 can move up and down on the inner surface of the tempered glass plate 3 to remove the adhering objects on the tempered glass plate 3, so that the surface of the tempered glass plate 3 maintains high light transmittance and facilitates observation of the processing status of the workpiece.

[0032] In this embodiment, the cleaning scraper 15 is fixedly installed on the mounting rod 16, and the two ends of the mounting rod 16 are connected to sliding blocks 17. The sliding blocks 17 are slidably connected to the protective door 2 through the dovetail groove 18.

[0033] like Figure 3 As shown, pulling the cleaning handle 14 moves it up and down in the slot 13, thereby driving the mounting rod 16 and the slider 17 to slide up and down on the inside of the protective door 2, so that the cleaning scraper 15 moves up and down on the inner surface of the tempered glass plate 3 to remove the attached substances on the inner surface of the tempered glass plate 3.

[0034] like Figure 4 As shown, in this embodiment, the sliding block 17 is further configured with an elongated hole, and the two ends of the mounting rod 16 extend into the elongated holes of the two sliding blocks 17 respectively. A compression spring 19 is connected between the inner wall of the elongated hole away from the protective door 2 and the mounting rod 16.

[0035] By setting a compression spring 19, the cleaning scraper 15 can be kept in close contact with the inner surface of the tempered glass plate 3 at all times, thereby improving the cleaning effect.

[0036] In this embodiment, the buckle lock includes a cylindrical latch 22 installed on the top of the protective net and an elastic latch 23 installed on the upper part of the observation window 6. The elastic latch 23 is provided with an Ω-shaped opening. When the top of the protective net 8 slides to the top edge of the observation window, the cylindrical latch 22 is engaged in the Ω-shaped opening of the elastic latch 23.

[0037] like Figure 5 As shown, the protective net 8 can be fixed by engaging the cylindrical locking pin 22 into the Ω-shaped opening of the elastic locking slot 23.

[0038] like Figure 6As shown, in this embodiment, an electromagnetic lock is further provided between the two protective doors 2. The electromagnetic lock includes a first electromagnet 12 installed inside one of the protective doors 2, and a permanent magnet 25 installed on the other protective door 2 at a position corresponding to the first electromagnet 12. A locking button 10 and an unlocking button 11 are installed on the door handle 9 of the protective door 2. Both the unlocking button 11 and the locking button 10 are electrically connected to the first electromagnet 12. The locking button 10 is used to connect the first electromagnet 12 to the power supply, and the unlocking button 11 is used to change the direction of the magnetic field of the first electromagnet 12.

[0039] For example, when both protective doors 2 are closed, the permanent magnet 25 attracts the iron core end of the first electromagnet 12, so that the protective door 2 is closed in place. When the locking button 10 is pressed, the first electromagnet 12 is energized and generates a magnetic field in the same direction as the permanent magnet 25 (that is, the magnetic fields of the ends of the first electromagnet 12 and the permanent magnet 25 that are in contact are opposite), which increases the attraction force between the permanent magnet 25 and the first electromagnet 12 and prevents the protective door 2 from being accidentally opened due to vibration or other factors during the processing. When it is necessary to open the protective door 2, the unlocking button 11 is pressed. The unlocking switch 11 can be connected to the first electromagnet 12 through a reversing relay or a reversing switch to change the direction of the current in the coil of the first electromagnet 12, so that the first electromagnet 12 and the permanent magnet 25 repel each other and complete the unlocking action.

[0040] Based on this, an indicator light 20 can be installed on the protective door 2 to indicate the locked or unlocked status of the protective door, so that the operator can confirm whether the protective door 2 has been locked.

[0041] In this embodiment, the device is further configured to include a protective door retainer 4, on which a second electromagnet 5 and a reset button 7 are installed. A soft magnetic block 21 is installed on the protective door 2. The reset button 7 and the unlock button 11 are both electrically connected to the second electromagnet 5. The unlock button 11 is used to connect the second electromagnet 5 to the power supply, and the reset button 7 is used to disconnect the power supply to the second electromagnet 5.

[0042] When the unlock button 11 is pressed, the second electromagnet 5 inside the protective door retainer 4 is powered on. When the protective door 2 is opened, the soft magnetic block 21 contacts the protective door retainer 4, and the second electromagnet 5 attracts the soft magnetic block 21, which can effectively prevent the protective door from accidentally closing and causing pinching injuries during the process of the operator opening the protective door to fix or remove the workpiece. When it is necessary to close the protective door 2, press the reset button 7 to de-energize the second electromagnet 5, and the protective door retainer 4 will release the fixation of the soft magnetic block 21.

[0043] Please see Figure 7 This utility model also proposes a machining center equipped with the above-mentioned protective device.

[0044] In this embodiment, a vertical milling and turning machining center is used as an example. The above-mentioned protective device is fixedly installed on the base of the machining center to achieve all-round protection of the machining center. The control interface and other auxiliary devices of the machining center can also be installed on the outer surface of the protective wall 1.

[0045] In the description of this utility model, the term "multiple" refers to two or more. Unless otherwise explicitly defined, the terms "upper," "lower," "left," "right," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. The terms "connection," "installation," "fixing," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection or an indirect connection through an intermediate medium. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances.

[0046] In the description of this utility model, the terms "one embodiment," "some embodiments," "specific embodiment," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of this utility model. In this utility model, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0047] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A protective device for a CNC machining center, comprising a protective wall (1), wherein a pair of protective doors (2) are slidably mounted on the front end of the protective wall (1) via a slide rail, and an observation window (6) is provided on the protective door (2), wherein a tempered glass plate (3) is installed on the observation window (6), characterized in that, The observation window (6) has a sliding groove (24) on its side, and a protective net (8) is slidably installed on the sliding groove (24). The protective area of ​​the protective net (8) covers the tempered glass plate (3). The interior of the protective door (2) is provided with a chamber to accommodate the protective net (8). A buckle lock is provided between the upper part of the protective net (8) and the observation window (6). The protective door (2) is provided with a cleaning scraper (15) inside. The cleaning scraper (15) is in contact with the inner surface of the tempered glass plate (3). A cleaning handle (14) is connected to the cleaning scraper (15). The cleaning handle (14) extends out of the outside of the protective door (2) through the slot (13) of the protective door (2).

2. The protective device for a CNC machining center according to claim 1, characterized in that, The cleaning scraper (15) is fixedly installed on the mounting rod (16), and the two ends of the mounting rod (16) are connected to sliding blocks (17). The sliding blocks (17) are slidably connected to the protective door (2) through the dovetail groove (18).

3. The protective device for a CNC machining center according to claim 2, characterized in that, The sliding block (17) is provided with an elongated hole, and the two ends of the mounting rod (16) extend into the elongated holes of the two sliding blocks (17) respectively. A compression spring (19) is connected between the inner wall of the elongated hole away from the protective door (2) and the mounting rod (16).

4. The protective device for a CNC machining center according to claim 1, characterized in that, The buckle lock includes a cylindrical pin (22) installed on the top of the protective net and an elastic latch (23) installed on the upper part of the observation window (6). The elastic latch (23) is provided with an Ω-shaped opening. When the top of the protective net (8) slides to the top edge of the observation window, the cylindrical pin (22) is engaged in the Ω-shaped opening of the elastic latch (23).

5. A protective device for a CNC machining center according to claim 1, characterized in that, An electromagnetic lock is provided between the two protective doors (2). The electromagnetic lock includes a first electromagnet (12) installed inside one of the protective doors (2). A permanent magnet (25) is installed on the other protective door (2) at a position corresponding to the first electromagnet (12). A locking button (10) and an unlocking button (11) are installed on the door handle (9) of the protective door (2). The unlocking button (11) and the locking button (10) are both electrically connected to the first electromagnet (12). The locking button (10) is used to turn on the power to the electromagnet (12), and the unlocking button (11) is used to change the direction of the magnetic field of the first electromagnet (12).

6. A protective device for a CNC machining center according to claim 5, characterized in that, It also includes a protective door retainer (4), on which a second electromagnet (5) and a reset button (7) are installed. A soft magnetic block (21) is installed on the protective door (2). The reset button (7) and the unlock button (11) are both electrically connected to the second electromagnet (5). The unlock button (11) is used to turn on the power to the second electromagnet (5), and the reset button (7) is used to turn off the power to the second electromagnet (5).

7. A machining center equipped with the protective device as described in any one of claims 1-6.

Images