Machining center CNC with height-adjustable center stand column

Abstract

The utility model relates to the technical field of CNC (computer numerical control) machining centers, in particular to a CNC machining center with a height-adjustable center stand column. According to the technical scheme, a mounting plate and a first sliding block are mounted on the surface of a lower supporting plate and the surface of an upper supporting plate correspondingly, a first lifting motor is mounted at the bottom end of the mounting plate, guide rods are arranged on the portions, located on the two sides of a first lead screw, of the mounting plate, and limiting plates are arranged at the ends, away from the mounting plate, of the first lead screw and the guide rods; the first sliding block and the first lead screw are in meshing transmission, and the upper supporting plate ascends and descends above the lower supporting plate through mutual cooperation of the first sliding block and the first lead screw. A fixing plate is installed on the support through a moving device, the drilling device is installed on the fixing plate, and a supporting plate is erected on the portion, below the fixing plate, of the support. The height of the central stand column can be adjusted. The height adjustability enables the machining center to adapt to the working requirements of different heights, and the machining flexibility and adaptability are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of CNC machining centers, in particular to a CNC machining center with an adjustable center column height. Background Art

[0002] The CNC machining center is an automated machine tool equipped with a program control system, which is the abbreviation of computer numerical control machine tool. The control system can logically process programs specified by control codes or other symbolic instructions, and decode them through a computer to enable the machine tool to move and process parts.

[0003] After searching, the Chinese patent publication number CN217913953U discloses a CNC machining center with an adjustable center column height. Although the device is provided with two fixedly connected limiting rods between the two limiting blocks during use, and a T-shaped protrusion is provided at the rear end of the sliding member to fit with a limiting groove on one side of the center column, so that the limiting rod passes through the hole through the sliding member and the sliding member can slide within the limited range of the limited groove and finally reach the sliding range of the limited sliding member, the device can only lift and lower the workpiece when in use. When encountering a workpiece with a height close to the height of the bracket, the workpiece cannot be processed, which affects the processing efficiency. Utility Model Content

[0004] In view of the deficiencies in the prior art, the present invention provides a CNC machining center with an adjustable center column height, which solves the problems raised in the background art.

[0005] The utility model solves the above-mentioned technical problems as follows:

[0006] A CNC machining center with an adjustable center column height comprises a base, a bracket mounted on the base, and a drilling device mounted on the bracket.

[0007] The bracket includes a lower support plate and an upper support plate, and a mounting plate and a first slider are respectively installed on the surfaces of the lower support plate and the upper support plate, and a first lifting motor is installed on the bottom end of the mounting plate, and a first screw rod is rotatably installed on the mounting plate, and a guide rod is provided on both sides of the mounting plate. The first screw rod and the guide rod are provided with a limit plate at one end away from the mounting plate, and the first slider is meshed with the first screw rod for transmission, and the upper support plate is lifted and lowered above the lower support plate by cooperating with the first slider and the first screw rod;

[0008] A fixing plate is installed on the bracket via a moving device, the drilling device is installed on the fixing plate, and a supporting plate is mounted on the bracket below the fixing plate.

[0009] On the basis of the above technical solution, the present invention can also be improved as follows.

[0010] Furthermore, the moving device includes a second lifting motor, an output end of the second lifting motor is installed with a second screw rod, and the second lifting motor is engaged with a fixing plate through the second screw rod.

[0011] The beneficial effects of adopting the above further scheme are:

[0012] Screw drives offer high precision and repeatability. The tight clearance between the screw and nut, coupled with the absence of slip during transmission, enables precise displacement control. The meshing connection between the screw and the fixed plate provides high rigidity and stability. This ensures high stability during machining, even under high cutting forces or vibration, ensuring precision and surface quality.

[0013] Furthermore, a second slider is installed on the back of the fixed plate, and slide rails are installed on both sides of the second screw rod on the bracket, and the fixed plate is guided by the cooperation of the second slider and the slide rails.

[0014] The beneficial effects of adopting the above further scheme are:

[0015] The combination of the rails and sliders provides high-precision guidance. This combined structure makes the fixed plate more stable during movement, less prone to shaking or shifting, and ensures the fixed plate follows an accurate trajectory. This design helps reduce positional deviations caused by inaccurate guidance and improves machining accuracy.

[0016] Furthermore, the fixing plate is provided with a connecting plate and a base plate, the drilling device is located on the base plate, and a balancing device is provided on one side of the drilling device on the base plate.

[0017] The beneficial effects of adopting the above further scheme are:

[0018] The base plate provides a stable support platform for the drilling device. The stable support platform helps reduce processing errors caused by vibration and offset, so that the vibration and impact force generated during the drilling process can be effectively dispersed and absorbed, thereby improving the stability and precision of drilling and ensuring the accuracy and consistency of drilling positions.

[0019] Furthermore, the drilling device includes a power motor, a nut seat is installed on the base plate, a telescopic screw is installed in the nut seat, a push plate is installed on the end of the telescopic screw facing the fixed plate, the push plate is installed in the slide groove, the power motor is installed on the push plate, and a chuck is installed on the side of the base plate away from the power motor, the chuck clamps and fixes the cutter head, and the chuck is connected to the power motor through a synchronous wheel and a synchronous belt transmission.

[0020] The beneficial effects of adopting the above further scheme are:

[0021] By adjusting the position of the telescopic screw within the nut, you can precisely control the tension of the timing belt between the synchronous pulleys. Proper tension ensures the stability and efficiency of the timing belt during transmission, reducing slippage or wear caused by excessive or insufficient tension.

[0022] Furthermore, the synchronous wheels and synchronous belts of the power motor and the chuck are located on the bottom surface of the base plate, and a protective cover is installed on the base plate at the synchronous wheels and synchronous belts of the power motor and the chuck.

[0023] The beneficial effects of adopting the above further scheme are:

[0024] During machining, workpieces or tools may generate splashes. Protective covers effectively prevent dust, chips, coolant, and other impurities from entering the areas where the synchronous pulleys and belts are located, thereby preventing these impurities from causing wear, corrosion, or blockage on the transmission components and ensuring the normal operation of the transmission system. Furthermore, synchronous pulleys and belts can pose certain risks when operating at high speeds. Protective covers effectively isolate these dangerous areas, reducing the operator's exposure and the probability of safety accidents.

[0025] Furthermore, the balancing device includes a cylinder, which is mounted on an upper support plate. The output end of the cylinder is connected and fixed to a base plate. The base plate is provided with a sleeve on one side of the cylinder, and an end plate is installed at the top end of the upper support plate. A connecting block is installed at the bottom end of the upper support plate. A limiting rod is installed between the end plate and the connecting block, and the limiting rod passes through the sleeve to limit the base plate.

[0026] The beneficial effects of adopting the above further scheme are:

[0027] The cylinder, the core component of the balancing device, is fixedly connected to the baseplate at its output end, providing stable support during drilling, effectively reducing baseplate movement caused by vibration or impact, thereby improving drilling stability and accuracy. A limit rod, extending through the sleeve, limits the baseplate's horizontal movement, preventing it from shifting or losing control due to external forces, further ensuring drilling accuracy and stability.

[0028] The utility model provides a CNC machining center with an adjustable center column height. It has the following beneficial effects:

[0029] When the center column needs to be adjusted, the first lift motor activates, rotating the first screw. The first slider engages the first screw, causing the upper support plate to rise and fall along the guide rod, adjusting the center column's height. This height adjustability allows the machining center to adapt to varying heights, enhancing machining flexibility and adaptability.

[0030] When the drilling device needs to be moved, the second lifting motor is activated, driving the second screw to rotate. Because the fixed plate is guided by the second slider and the slide rail, it moves along the direction of the slide rail. This design ensures the stability and precision of the drilling device during processing. The stable movement mechanism ensures precise positioning and stable movement of the drilling device during processing, helping to improve processing accuracy and efficiency. It also helps reduce vibration and errors, improving processing quality.

[0031] The output end of the cylinder is fixedly connected to the baseplate. When the cylinder is inflated or deflated, it pushes or pulls the baseplate for fine-tuning. Furthermore, a limit rod running through the sleeve limits the baseplate's position, preventing it from excessive displacement or tilting during machining. The use of a balancing device helps reduce vibration and errors in the drilling mechanism during machining, improving machining accuracy and stability. It also helps protect machine tool components from damage and extends their service life.

[0032] The power motor drives the tool head through a synchronous pulley and a timing belt, connecting the chuck to the tool head for rotation. A telescopic screw, through a push plate, pushes the chuck axially to achieve feed motion, maintaining tension on the timing belt between the synchronous pulleys. This design enables the drilling device to achieve efficient and precise drilling operations, improving machining efficiency and accuracy while reducing production costs. It also facilitates high-precision machining of complex parts to meet diverse production needs. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of this application. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention.

[0034] In the attached figure:

[0035] Figure 1 This is a schematic diagram of the axial side appearance of the utility model;

[0036] Figure 2 This is a schematic diagram of the axial side appearance of the bracket of the present invention;

[0037] Figure 3 This is a schematic diagram of the axial side appearance of the balancing device of the present invention;

[0038] Figure 4 This is a schematic diagram of the axial side appearance of the fixing plate of the present invention;

[0039] Figure 5 This is a schematic diagram of the axial side appearance of the drilling device of the present invention.

[0040] In the accompanying drawings, the components represented by the reference numerals are as follows:

[0041] 1. Base; 2. Lower support plate; 3. Drilling device; 301. Power motor; 302. Telescopic screw rod; 303. Nut seat; 304. Push plate; 305. Chuck; 4. Upper support plate; 5. Balancing device; 501. End plate; 502. Cylinder; 503. Limit rod; 504. Bushing; 6. Bracket; 601. Limit plate; 602. Guide rod; 603. First screw rod; 604. First slider; 605. Mounting plate; 606. First lifting motor; 607. Connecting block; 7. Moving device; 701. Second lifting motor; 702. Slide rail; 703. Second screw rod; 704. Second slider; 8. Fixing plate; 801. Connecting plate; 802. Base plate; 803. Protective cover; 804. Slide groove; 9. Support plate. DETAILED DESCRIPTION

[0042] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0043] See also Figures 1 to 5 As shown, the embodiment provided by the utility model:

[0044] Example 1

[0045] A CNC machining center with adjustable center column height includes a base 1, a bracket 6 is installed on the base 1, a drilling device 3 is installed on the bracket 6, the bracket 6 includes a lower support plate 2 and an upper support plate 4, the surfaces of the lower support plate 2 and the upper support plate 4 are respectively installed with a mounting plate 605 and a first slider 604, the bottom end of the mounting plate 605 is installed with a first lifting motor 606, a first screw rod 603 is rotatably installed on the mounting plate 605, guide rods 602 are provided on both sides of the mounting plate 605 located on the first screw rod 603, and a limit plate 601 is provided at the end of the first screw rod 603 and the guide rod 602 facing away from the mounting plate 605, the first slider 604 is engaged with the first screw rod 603 for transmission, and the upper support plate 4 is lifted and lowered above the lower support plate 2 through the cooperation of the first slider 604 and the first screw rod 603.

[0046] Example 2

[0047] In order to achieve smooth lifting of the fixing plate 8, for example, as shown in FIG. Figures 1 to 5As shown, the present invention further includes: a fixed plate 8 is mounted on the bracket 6 via a moving device 7, the moving device 7 includes a second lifting motor 701, a second screw 703 is mounted on the output end of the second lifting motor 701, and the second lifting motor 701 is engaged with the fixed plate 8 via the second screw 703. The screw transmission has the characteristics of high precision and high repeatability. Because the clearance between the screw and the nut is small and there is no slip during the transmission process, precise displacement control can be achieved. The screw and the fixed plate 8 are connected by a meshing method, which has high rigidity and stability. During the processing, even when subjected to large cutting forces or vibrations, good stability can be maintained, ensuring processing accuracy and surface quality. A second slider 704 is mounted on the back of the fixed plate 8, and slide rails 702 are mounted on both sides of the second screw 703 on the bracket 6. The fixed plate 8 is guided by the cooperation of the second slider 704 and the slide rails 702. The cooperation between the slide rails 702 and the slider can provide a high-precision guiding effect, making the fixed plate 8 more stable during movement and less prone to shaking or displacement. This design helps to reduce the position deviation caused by inaccurate guidance and improve the processing accuracy. The drilling device 3 is installed on the fixed plate 8, and the fixed plate 8 is provided with a connecting plate 801 and a base plate 802. The drilling device 3 is located on the base plate 802, and a balancing device 5 is provided on the base plate 802 on one side of the drilling device 3. The base plate 802 provides a stable support platform for the drilling device 3. The stable support platform helps to reduce the processing error caused by vibration and offset, so that the vibration and impact force generated during the drilling process can be effectively dispersed and absorbed, thereby improving the stability and accuracy of the drilling and ensuring the accuracy and consistency of the drilling position. The balancing device 5 includes a cylinder 502. The cylinder 502 is installed on the upper support plate 4, and the output end of the cylinder 502 is connected and fixed to the base plate 802. The base plate 802 is located on one side of the cylinder 502 and is provided with a sleeve 504, and the top of the upper support plate 4 is installed with an end plate 501, and the bottom end of the upper support plate 4 is installed with a connecting block 607. A limiting rod 503 is installed between the end plate 501 and the connecting block 607, and the limiting rod 503 passes through the sleeve 504 to limit the base plate 802. The cylinder 502 serves as the core component of the balancing device 5, and its output end is connected and fixed to the base plate 802, which can provide stable supporting force during the drilling process, effectively reducing the shaking of the base plate 802 caused by vibration or impact, thereby improving the stability and accuracy of drilling.The limiting rod 503 passes through the shaft sleeve 504 to limit the base plate 802, thereby limiting the horizontal movement range of the base plate 802, preventing the base plate 802 from being offset or out of control due to external force, and further ensuring the accuracy and stability of drilling. The drilling device 3 includes a power motor 301, a nut seat 303 is installed on the base plate 802, and a telescopic screw rod 302 is installed in the nut seat 303. A push plate 304 is installed at the end of the telescopic screw rod 302 facing the fixed plate 8, and the push plate 304 is installed in the slide groove 804. The power motor 301 is installed on the push plate 304, and a chuck 305 is installed on the side of the base plate 802 away from the power motor 301. The chuck 305 clamps and fixes the cutter head. The chuck 305 is connected to the power motor 301 through a synchronous wheel and a synchronous belt transmission. By adjusting the position of the telescopic screw rod 302 in the nut seat 303, the tension of the synchronous belt between the synchronous wheels can be accurately controlled. Appropriate tension can ensure the stability and efficiency of the synchronous belt during the transmission process and reduce slippage or wear caused by excessive or insufficient tension. The synchronous pulleys and synchronous belts of the power motor 301 and the chuck 305 are located on the bottom surface of the base plate 802, and a shield 803 is installed on the base plate 802 at the synchronous pulleys and synchronous belts of the power motor 301 and the chuck 305. During the processing, the workpiece or tool may generate splashes. The installation of the shield 803 can effectively prevent impurities such as dust, chips, and coolant from entering the area where the synchronous pulleys and synchronous belts are located, thereby preventing these impurities from causing wear, corrosion, or blockage on the transmission components, ensuring the normal operation of the transmission system. In addition, the synchronous pulleys and synchronous belts may pose certain risks when running at high speeds. The presence of the shield 803 can effectively isolate these dangerous areas, reducing the operator's chance of contact, thereby reducing the probability of safety accidents. The bracket 6 is located below the fixed plate 8 and is equipped with a support plate 9.

[0048] Working principle:

[0049] When the height of the machining center needs to be adjusted, the first lifting motor 606 is first activated, causing it to rotate the first screw 603. Due to the meshing relationship between the first slider 604 and the first screw 603, when the first screw 603 rotates, the first slider 604 moves along the axis of the screw. The upper support plate 4 is connected to the lower support plate 2 via the first slider 604. Therefore, when the first slider 604 moves, the upper support plate 4 also moves up and down, thereby adjusting the height of the bracket 6.

[0050] When the drilling device 3 needs to be moved, the second lifting motor 701 is activated, driving the second screw 703 to rotate. The fixed plate 8 is connected to the slide rail 702 via the second slider 704. When the second screw 703 rotates, the fixed plate 8 moves along the slide rail 702. Since the drilling device 3 is mounted on the fixed plate 8, it is precisely positioned in three dimensions as the fixed plate 8 moves.

[0051] The output end of the cylinder 502 is connected to the base plate 802. When the cylinder 502 is inflated or deflated, it can push or pull the base plate 802 for fine adjustment to maintain the balance and stability of the drilling device 3. The combination of the limit rod 503 and the shaft sleeve 504 limits the base plate 802 to prevent it from excessive displacement or tilting during the machining process.

[0052] The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention. For those skilled in the art, it is obvious that the present invention is not limited to the details of the above exemplary embodiments, and that the present invention can be implemented in other specific forms without departing from the spirit or basic characteristics of the present invention. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive. The scope of the present invention is defined by the appended claims rather than the above description. Therefore, it is intended that all changes that fall within the meaning and range of equivalents of the claims are included in the present invention. Any reference signs in the claims should not be construed as limiting the claim to which they relate.

[0053] In addition, it should be understood that although this specification is described in terms of implementation methods, not every implementation method contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

Claims

1. A CNC machining center with an adjustable center column height, comprising a base (1), a bracket (6) mounted on the base (1), a drilling device (3) mounted on the bracket (6), and characterized in that: The bracket (6) includes a lower support plate (2) and an upper support plate (4), and a mounting plate (605) and a first slider (604) are respectively mounted on the surfaces of the lower support plate (2) and the upper support plate (4). A first lifting motor (606) is mounted on the bottom end of the mounting plate (605), and a first screw rod (603) is rotatably mounted on the mounting plate (605). Guide rods (602) are provided on both sides of the mounting plate (605) and the first screw rod (603). A limit plate (601) is provided at one end of the first screw rod (603) and the guide rod (602) facing away from the mounting plate (605). The first slider (604) is engaged with the first screw rod (603) for transmission, and the upper support plate (4) is lifted and lowered above the lower support plate (2) by the cooperation of the first slider (604) and the first screw rod (603). A fixing plate (8) is installed on the bracket (6) via a moving device (7), the drilling device (3) is installed on the fixing plate (8), and a supporting plate (9) is mounted on the bracket (6) below the fixing plate (8).

2. The CNC machining center with adjustable center column height according to claim 1, characterized in that: The moving device (7) comprises a second lifting motor (701), the output end of the second lifting motor (701) is mounted with a second screw rod (703), and the second lifting motor (701) is engaged with a fixing plate (8) via the second screw rod (703).

3. The CNC machining center with adjustable center column height according to claim 2, characterized in that: A second slider (704) is installed on the back of the fixed plate (8), and slide rails (702) are installed on both sides of the second screw rod (703) on the bracket (6). The fixed plate (8) is guided by the cooperation of the second slider (704) and the slide rails (702).

4. The CNC machining center with adjustable center column height according to claim 3, characterized in that: The fixing plate (8) is provided with a connecting plate (801) and a base plate (802), the drilling device (3) is located on the base plate (802), and a balancing device (5) is provided on the base plate (802) on one side of the drilling device (3).

5. The CNC machining center with adjustable center column height according to claim 4, characterized in that: The drilling device (3) comprises a power motor (301), a nut seat (303) is mounted on the base plate (802), a telescopic screw rod (302) is mounted in the nut seat (303), a push plate (304) is mounted on one end of the telescopic screw rod (302) facing the fixed plate (8), the push plate (304) is mounted in the slide groove (804), the power motor (301) is mounted on the push plate (304), a chuck (305) is mounted on the side of the base plate (802) facing away from the power motor (301), the chuck (305) clamps and fixes the cutter head, and the chuck (305) is connected to the power motor (301) through a synchronous wheel and a synchronous belt transmission.

6. The CNC machining center with adjustable center column height according to claim 5, characterized in that: The synchronous wheels and synchronous belts of the power motor (301) and the chuck (305) are located on the bottom surface of the base plate (802), and a protective cover (803) is installed on the base plate (802) at the synchronous wheels and synchronous belts of the power motor (301) and the chuck (305).

7. The CNC machining center with adjustable center column height according to claim 4, characterized in that: The balancing device (5) comprises a cylinder (502), the cylinder (502) being mounted on an upper support plate (4), the output end of the cylinder (502) being connected and fixed to a base plate (802), the base plate (802) being provided with a shaft sleeve (504) on one side of the cylinder (502), and an end plate (501) being mounted on the top end of the upper support plate (4), a connecting block (607) being mounted on the bottom end of the upper support plate (4), a limiting rod (503) being mounted between the end plate (501) and the connecting block (607), and the limiting rod (503) passing through the shaft sleeve (504) to limit the base plate (802).

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