A connecting structure for a machine clamp type tool

Abstract

This utility model discloses a connection structure for mechanically clamped cutting tools, relating to the field of machining technology. It includes: a fixed base plate for mounting and fixing to a CNC machine tool; a connecting plate disposed on one side of the fixed base plate and maintaining a movable connection; tool mounting seats disposed on the top and bottom of the connecting plate, with transmission boxes disposed on the sides of the two tool mounting seats that are close to each other; a clamping plate disposed inside the tool mounting seats for clamping and fixing the mechanically clamped tool, achieving a fixed connection between the mechanically clamped tool and the CNC machine tool; and a directional pushing mechanism disposed inside the transmission boxes for pushing the clamping plate to move in a directional direction, achieving a fixed adjustment of the mechanically clamped tool. This utility model forms a highly compact overall structure through a rotary dual-station layout and a mechanical locking mechanism, not only saving the disassembly and reassembly time required for traditional tool changes, but also achieving dual-station functionality within a limited volume, significantly improving equipment space utilization and system rigidity.

Description

Technical Field

[0001] This utility model relates to the field of machining technology, and more specifically, to a connecting structure for a mechanically clamped cutting tool. Background Technology

[0002] Mechanically clamped cutting tools are cutting tools that use mechanical clamping to fix replaceable inserts to the tool holder or tool body. The core of this type of tool is to avoid welding processes and directly use clamping elements (such as screws, pressure plates, wedges, etc.) to achieve insert positioning and fixation.

[0003] In practical applications of indexable cutting tools, turning tools, as the most common cutting tools, typically use clamping mechanisms to fix indexable inserts to the tool holder. Traditional connection structures often use screws or pressure plates to directly lock the inserts, requiring repeated tightening of bolts for installation and removal. When changing inserts for different processes, operators must disassemble the entire tool body from the machine tool, then reinstall the new tool and recalibrate its position. This process is time-consuming, and repeated disassembly and reassembly can cause wear on the tool holder's positioning reference surface, leading to decreased installation accuracy. Furthermore, when the force direction of the traditional clamping mechanism is inconsistent with the cutting force direction, it may cause insert displacement or vibration, especially affecting dimensional stability during heavy cutting.

[0004] To address the complex requirements of multi-stage machining, existing solutions typically involve adding a turret station to accommodate different cutting tools. This approach increases the turret size, and if the mounting base lacks rigidity, the increased overhang can cause machining vibrations. Some devices attempt to incorporate rotatable tool holders, but lack rigid locking mechanisms, relying solely on friction for positioning after rotation, making it difficult to guarantee station repeatability. At the clamping structure level, most devices only use a single pressure plate to clamp the bottom of the cutting tool, lacking effective constraints for lateral tool positioning. During axial turning or face turning, the tool may experience slight displacement due to lateral forces.

[0005] No effective solutions have yet been proposed to address the problems in the relevant technologies. Utility Model Content

[0006] In view of the problems in the related technologies, this utility model proposes a connecting structure for mechanically clamped cutting tools to overcome the above-mentioned technical problems existing in the existing related technologies.

[0007] Therefore, the specific technical solution adopted by this utility model is as follows: A connecting structure for a mechanically clamped cutting tool includes: A mounting base plate is used for mounting and fixing on CNC machine tools; A connecting plate is disposed on one side of the fixed base plate and remains in a movable connection. Tool mounting bases are located at the top and bottom of the connecting plate, and transmission boxes are provided on the side of the two tool mounting bases that are close to each other. The clamping plate, located inside the tool mounting base, is used to clamp and fix the mechanically clamped tool, thereby achieving a fixed connection between the mechanically clamped tool and the CNC machine tool. The directional pushing mechanism, located inside the transmission box, is used to push the clamping plate to move in a directional manner, thereby achieving the fixed adjustment of the mechanically clamped tool.

[0008] Furthermore, in order to allow the connecting plate to rotate on the fixed shaft, enabling the replacement of the machine-clamped tool on the connecting plate, and after the replacement is completed, the connecting plate and the fixed base plate are fixedly connected by the limit bolts on both sides to ensure the stability of the tool during application, a fixed shaft is set in the middle of one side of the fixed base plate. The fixed shaft has a T-shaped structure and penetrates through the connecting plate; limit holes are opened on both sides of the fixed shaft, and limit bolts that cooperate with the limit holes are set on both sides of the connecting plate.

[0009] Furthermore, to enable tool mounting seats to be installed at both the top and bottom of the connecting plate, forming a dual-station design, and to allow switching between any tool station in conjunction with the fixed shaft; and to clamp and fix the tool inside the tool mounting seat to ensure stability and safety during use, mounting grooves are opened at the top and bottom of the connecting plate, with the tool mounting seat located inside the mounting groove, and mounting holes are opened on both sides of the mounting groove; the tool mounting seat has a U-shaped structure, and mounting bolts that mate with the mounting holes are provided on both sides of the tool mounting seat.

[0010] Furthermore, in order to fix the transmission box inside the tool mounting base, and to make the upper and lower transmission boxes opposite in position and symmetrical to each other, the end of the transmission box facing the clamping plate is an open end, and the two ends of the transmission box are fixedly connected to the tool mounting base by fixing bolts.

[0011] Furthermore, in order to maintain connection with the directional pushing mechanism through the connecting column and form a stable limit through the side wall of the tool mounting seat, the connecting column can be directionally moved; at the same time, the L-shaped clamping plate can clamp and fix the side and bottom of the tool. The clamping plate is L-shaped and has multiple connecting columns at the bottom end, which penetrate through the tool mounting seat to the inside of the transmission box.

[0012] Furthermore, in order to utilize the worm gear and worm shaft to drive the connecting column to achieve automatic lifting and lowering, thereby moving the clamping plate inside the tool mounting seat and achieving full contact and clamping of the tool, the directional pushing mechanism includes a worm gear bracket located on one side inside the transmission box. The worm gear bracket has a double-layer structure with multiple equidistantly arranged worm gear fixing rings at the top and bottom. A worm gear that mates with the connecting column is located between the upper and lower worm gear fixing rings. A worm shaft that mates with the worm gear is located on the other side inside the transmission box, and a drive motor is located on the outside of the transmission box. The output end of the drive motor is connected to the worm shaft.

[0013] Furthermore, in order to ensure that the worm wheel can be fixed inside the worm wheel bracket and can only rotate under the drive of the worm, preventing the worm wheel from shifting position or falling off, the worm wheel has a U-shaped structure and an internal thread structure inside the worm wheel, while the bottom of the connecting column has an external thread structure that matches the inside of the worm wheel.

[0014] Furthermore, in order to add adjustable side-distance adjusting bolts to the clamping plate to further clamp and fix the tool side, so that the tool fully fits the side wall of the tool mounting seat in the lateral direction, multiple equally spaced adjusting bolts are provided on one side of the clamping plate, and the adjusting bolts are threadedly engaged with the side wall of the clamping plate.

[0015] The beneficial effects of this utility model are as follows: 1. A highly compact overall structure is formed by a rotary dual-station layout and mechanical locking mechanism. The connecting plate can switch mechanically clamped tools on the fixed base plate by rotating. Combined with the symmetrically arranged C-shaped tool mounting seats, different types of tools can be switched on the same tool holder. This not only saves the disassembly and reassembly time required for traditional tool changing, but also achieves dual-station function within a limited volume through the stacked spatial arrangement of the fixed base plate, transmission box and clamping plate, which significantly improves the space utilization of the equipment and the rigidity of the system.

[0016] 2. The directional pushing mechanism driven by the worm gear drives the motor torque into the vertical linear displacement of the connecting column, which drives the clamping plate to press the bottom of the tool. At the same time, the lateral tightening bolt actively eliminates the tool backlash. The double clamping mechanism ensures that the bearing surface at the bottom of the tool and the lateral constraint surface are controlled synchronously, effectively suppressing the tool runout caused by the cutting force and providing a constant clamping force basis for high-precision turning.

[0017] 3. The worm gear speed is directly controlled by the CNC system to achieve digital adjustment of the clamping stroke; the coordination of electrical control and mechanical interlocking enables a seamless operation process for tool position switching and clamping force loading, taking into account both operational efficiency and process stability, and adapting to the automation requirements of automated production lines for tool systems. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of a connecting structure for a mechanically clamped cutting tool according to an embodiment of the present utility model; Figure 2This is an exploded view of a connecting structure for a mechanically clamped cutting tool according to an embodiment of the present utility model; Figure 3 This is a partial sectional view of the tool mounting base and transmission box in a connecting structure for a mechanically clamped tool according to an embodiment of the present utility model; Figure 4 This is a schematic diagram of the internal structure of the transmission box in a connecting structure for a mechanically clamped cutting tool according to an embodiment of the present utility model; Figure 5 This is a schematic diagram of a mechanically clamped tool assembly according to an embodiment of the present utility model, showing a connection structure for a mechanically clamped tool.

[0020] In the picture: 1. Fixed base plate; 2. Connecting plate; 3. Tool mounting seat; 4. Transmission box; 5. Clamping plate; 6. Orientation and pushing mechanism; 601. Worm gear bracket; 602. Worm gear retaining ring; 603. Worm gear; 604. Worm; 605. Drive motor; 7. Fixed shaft; 8. Limiting hole; 9. Limiting bolt; 10. Mounting groove; 11. Mounting hole; 12. Mounting bolt; 13. Fixing bolt; 14. Connecting column; 15. Adjusting bolt. Detailed Implementation

[0021] To further illustrate the various embodiments, the present invention provides accompanying drawings, which are part of the disclosure of the present invention. These drawings are mainly used to illustrate the embodiments and can be used in conjunction with the relevant descriptions in the specification to explain the operating principles of the embodiments. With reference to these contents, those skilled in the art should be able to understand other possible implementation methods and the advantages of the present invention. The components in the figures are not drawn to scale, and similar component symbols are usually used to represent similar components.

[0022] According to an embodiment of the present invention, a connection structure for a mechanically clamped cutting tool is provided.

[0023] The present invention will now be further described in conjunction with the accompanying drawings and specific embodiments, such as... Figures 1-5 As shown, the connecting structure for a mechanically clamped cutting tool according to an embodiment of the present invention includes: Fixed base plate 1, used for mounting and fixing on CNC machine tools; Connecting plate 2 is disposed on one side of fixed base plate 1 and is kept in a movable connection; Tool mounting base 3 is located at the top and bottom of connecting plate 2, and transmission box 4 is provided on the side of the two tool mounting bases 3 that are close to each other; Clamping plate 5 is set inside tool mounting base 3 and is used to clamp and fix mechanically clamped tools to achieve fixed connection between mechanically clamped tools and CNC machine tools; The directional pushing mechanism 6 is located inside the transmission box 4 and is used to push the clamping plate 5 to move in a directional manner, thereby achieving the fixed adjustment of the mechanically clamped tool.

[0024] By utilizing the aforementioned technical solution, a highly compact overall structure is formed through a rotary dual-station layout and mechanical locking mechanism. The connecting plate 2 can switch between mechanically clamped tools on the fixed base plate 1 by rotating. Combined with the symmetrically arranged C-shaped tool mounting seats 3, tools of different machining types can be switched on the same tool holder. This not only saves the disassembly and reassembly time required for traditional tool changes, but also achieves dual-station functionality within a limited volume through the stacked spatial arrangement of the fixed base plate 1, transmission box 4, and clamping plate 5, significantly improving equipment space utilization and system rigidity. The directional pushing mechanism 6, driven by a worm gear, converts the motor torque into the vertical linear displacement of the connecting column, driving the clamping plate 5 to press the bottom of the tool. The dual clamping mechanism ensures that the bottom bearing surface and the lateral constraint surface of the tool are simultaneously controlled, effectively suppressing tool runout caused by cutting force and providing a constant clamping force foundation for high-precision turning.

[0025] In one embodiment, for the aforementioned fixed base plate 1, a fixed shaft 7 is provided at the middle position on one side of the fixed base plate 1. The fixed shaft 7 has a T-shaped structure and penetrates the connecting plate 2. Limiting holes 8 are provided on both sides of the fixed shaft 7, and limiting bolts 9 that cooperate with the limiting holes 8 are provided on both sides of the connecting plate 2. This allows the connecting plate 2 to rotate on the fixed shaft 7, thereby realizing the position change of the clamped tool (hereinafter referred to as the tool) on the connecting plate 2. After the change is completed, the limiting bolts 9 on both sides are used to maintain the fixed connection between the connecting plate 2 and the fixed base plate 1, ensuring the stability of the tool during application.

[0026] In one embodiment, the connecting plate 2 has mounting grooves 10 at both its top and bottom, and a tool mounting seat 3 is located inside the mounting groove 10. Mounting holes 11 are provided on both sides of the mounting groove 10. The tool mounting seat 3 has a U-shaped structure, and mounting bolts 12 that mate with the mounting holes 11 are provided on both sides inside the tool mounting seat 3. This allows the connecting plate 2 to have tool mounting seats 3 at both the top and bottom, forming a dual-station design. With the help of the fixed shaft 7, the tool can be switched between any tool stations. Furthermore, the tool can be clamped and fixed inside the tool mounting seat 3 to ensure stability and safety during use.

[0027] In one embodiment, for the transmission box 4, the end of the transmission box 4 facing the clamping plate 5 is an open end, and both ends of the transmission box 4 are fixedly connected to the tool mounting base 3 by fixing bolts 13, so that the transmission box 4 is fixed in the tool mounting base 3, and the upper and lower transmission boxes 4 are in opposite positions and symmetrical to each other.

[0028] In one embodiment, the clamping plate 5 is an L-shaped structure. The bottom end of the clamping plate 5 is provided with a plurality of connecting posts 14. The connecting posts 14 penetrate through the tool mounting base 3 to the inside of the transmission box 4, so that they can be connected to the directional pushing mechanism 6 and form a stable limit through the side wall of the tool mounting base 3, so that the connecting posts 14 can move in a directional manner. At the same time, the L-shaped clamping plate 5 can clamp and fix the side and bottom of the tool.

[0029] In one embodiment, the directional pushing mechanism 6 includes a worm gear bracket 601 disposed on one side inside the transmission box 4. The worm gear bracket 601 has a double-layer structure and multiple worm gear fixing rings 602 arranged at equal intervals are provided at the top and bottom. A worm gear 603 that cooperates with the connecting column 14 is disposed between the upper and lower worm gear fixing rings 602. A worm 604 that cooperates with the worm gear 603 is disposed on the other side inside the transmission box 4. A drive motor 605 is disposed on the outer side of the transmission box 4. The output end of the drive motor 605 is connected to the worm 604. Thus, by utilizing the cooperation of the worm gear and worm, the connecting column 14 is driven to achieve automatic lifting and lowering, thereby driving the clamping plate 5 to move inside the tool mounting seat 3, achieving full contact and clamping fixation of the tool.

[0030] It should be noted that the power supply and signal input / output of the drive motor 605 are integrated into the controller of the CNC machine tool. The use of the drive motor 605 and the adjustment of its operating parameters are selected through the control panel of the CNC machine tool itself. Furthermore, the rotation of the connecting plate 2 on the fixed axis 7 only requires adjustment to two positions: a 180° forward rotation or a 180° reverse rotation. Rotation of 360° or more is not required, therefore, it does not affect the wiring connection between the drive motor 605 and the CNC machine tool.

[0031] In one embodiment, the worm gear 603 has a U-shaped structure and an internal thread structure. The bottom of the connecting column 14 has an external thread structure that mates with the internal thread of the worm gear 603. This allows the worm gear 603 to be fixed inside the worm gear bracket 601 and to rotate only under the drive of the worm 604, preventing the worm gear 603 from shifting position or falling off.

[0032] In one embodiment, for the clamping plate 5, a plurality of equidistant adjusting bolts 15 are provided on one side of the clamping plate 5. The adjusting bolts 15 are threadedly engaged with the side wall of the clamping plate 5, thereby adding adjusting bolts 15 that can adjust the side distance on the clamping plate 5 to further clamp and fix the side of the tool, so that the tool is fully in lateral contact with the side wall of the tool mounting seat 3.

[0033] To facilitate understanding of the above-mentioned technical solutions of this utility model, the working principle or operation method of this utility model in actual process will be described in detail below.

[0034] In practical applications, the operator first secures the fixed base plate 1 to the CNC machine tool turret or slide, ensuring that its reference plane is precisely aligned with the machine tool coordinate system. After completing the basic installation, the target tool station is selected according to the machining process requirements: if tool switching is required, the limiting bolts 9 on both sides of the connecting plate 2 are loosened, and the connecting plate 2 is manually rotated 180° around the fixed axis 7, so that the tool mounting seat on the other side rotates to the machining position. Then, the limiting bolts 9 are retightened and inserted into the corresponding limiting holes 8 to complete the mechanical locking of the station.

[0035] The tool clamping process is performed within the selected workstation. The cutting tool is vertically placed into the receiving space of the U-shaped tool mounting base 3, with the bottom of the tool shank against the inner surface of the tool mounting base 3. After starting the drive motor 605, its output shaft drives the worm gear 604 to rotate. The worm gear 604 meshes with the worm wheel 603, forcing it to rotate within the worm wheel support 601. Since the worm wheel 603 has an internal thread structure, the connecting post 14, which is threaded to it, undergoes a vertical linear displacement, pushing the clamping plate 5 to press against the bottom surface of the cutting tool shank from below, forming the main clamping force. At this time, the cutting tool has been initially fixed in the vertical direction.

[0036] To eliminate the risk of lateral tool displacement, fine-tuning in the lateral direction is required. The operator tightens the adjusting bolts 15 arranged on the side of the clamping plate 5 in sequence, ensuring the front ends of the adjusting bolts 15 press against the side wall of the cutting tool, forcing the tool to fully conform to the lateral positioning surface of the tool mount. This step simultaneously enhances vertical and lateral constraints, ensuring the cutting tool remains stable and does not wobble when subjected to cutting forces. During machining, the enclosed structure of the transmission box 4 provides physical protection for the worm gear mechanism, preventing cutting fluid and metal debris from entering the transmission system. When it is necessary to change the tool or adjust the clamping state, simply reverse the drive motor 605 to reverse the worm gear 603, and the clamping plate 5 will automatically descend and release the clamp. The entire process requires no disassembly of any main components; the entire operation can be achieved solely through controller commands and manual bolt adjustments.

[0037] In summary, by utilizing the above-mentioned technical solution of this utility model, a highly compact overall structure is formed through a rotary dual-station layout and a mechanical locking mechanism. The connecting plate 2 can switch between mechanically clamped tools by rotating on the fixed base plate 1. Combined with the symmetrically arranged C-shaped tool mounting seats 3, tools of different machining types can be switched on the same tool holder. This not only saves the disassembly and reassembly time required for traditional tool changing, but also achieves dual-station functionality within a limited volume through the stacked spatial arrangement of the fixed base plate 1, transmission box 4, and clamping plate 5, significantly improving the space utilization and system rigidity of the equipment. The directional pushing mechanism 6, driven by a worm gear, converts the motor torque into the vertical linear displacement of the connecting column, driving the clamping plate 5 to press the bottom of the tool. At the same time, the lateral tightening bolt 15 actively eliminates tool backlash. The dual clamping mechanism ensures that the bottom bearing surface and the lateral constraint surface of the tool are controlled synchronously, effectively suppressing tool runout caused by cutting force and providing a constant clamping force basis for high-precision turning. The worm gear 604 speed is directly controlled by the CNC system, realizing digital adjustment of the clamping stroke; the synergy of electrical control and mechanical interlocking enables a seamless operation process for tool position switching and clamping force loading, taking into account both operational efficiency and process stability, and adapting to the automation requirements of automated production lines for tool systems.

[0038] In this utility model, unless otherwise explicitly specified and limited, the terms "installation", "setting", "connection", "fixing", "screw connection", etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal connection of two components or the interaction between two components. Unless otherwise explicitly limited, those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0039] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A connecting structure for a mechanically clamped cutting tool, characterized in that, include: A fixed base plate (1) is used for mounting and fixing on a CNC machine tool; A connecting plate (2) is disposed on one side of the fixed base plate (1) and remains in a movable connection; A tool mounting base (3) is provided at the top and bottom of the connecting plate (2), and a transmission box (4) is provided on the side of the two tool mounting bases (3) that are close to each other. The clamping plate (5) is set inside the tool mounting base (3) to clamp and fix the mechanically clamped tool, thereby realizing the fixed connection between the mechanically clamped tool and the CNC machine tool. The directional pushing mechanism (6) is located inside the transmission box (4) and is used to push the clamping plate (5) to move in a directional manner to achieve the fixed adjustment of the mechanically clamped tool.

2. The connecting structure for a mechanically clamped cutting tool according to claim 1, characterized in that, A fixing shaft (7) is provided at the middle position on one side of the fixing base plate (1). The fixing shaft (7) is a T-shaped structure and passes through the connecting plate (2). Limiting holes (8) are provided on both sides of the fixed shaft (7), and limiting bolts (9) that cooperate with the limiting holes (8) are provided on both sides of the connecting plate (2).

3. The connecting structure for a mechanically clamped cutting tool according to claim 1, characterized in that, The connecting plate (2) has mounting grooves (10) at both the top and bottom. The tool mounting seat (3) is located inside the mounting groove (10). Mounting holes (11) are provided on both sides of the mounting groove (10). The tool mounting base (3) has a U-shaped structure, and mounting bolts (12) that cooperate with the mounting holes (11) are provided on both sides of the tool mounting base (3).

4. The connecting structure for a mechanically clamped cutting tool according to claim 1, characterized in that, The transmission box (4) has an open end facing the clamping plate (5), and both ends of the transmission box (4) are fixedly connected to the tool mounting seat (3) by fixing bolts (13).

5. The connecting structure for a mechanically clamped cutting tool according to claim 1, characterized in that, The clamping plate (5) has an L-shaped structure, and a plurality of connecting posts (14) are provided at the bottom end of the clamping plate (5). The connecting posts (14) penetrate through the tool mounting seat (3) to the inside of the transmission box (4).

6. The connecting structure for a mechanically clamped cutting tool according to claim 5, characterized in that, The directional pushing mechanism (6) includes a worm gear bracket (601) disposed on one side inside the transmission box (4). The worm gear bracket (601) has a double-layer structure and multiple worm gear fixing rings (602) arranged at equal intervals are provided at the top and bottom. A worm gear (603) that cooperates with the connecting column (14) is provided between the upper and lower worm gear fixing rings (602). The transmission box (4) has a worm (604) that cooperates with the worm wheel (603) on the other side inside, and a drive motor (605) is provided on the outside side of the transmission box (4). The output end of the drive motor (605) is connected to the worm (604).

7. The connecting structure for a mechanically clamped cutting tool according to claim 6, characterized in that, The worm gear (603) has a Chinese character-shaped structure and an internal thread structure inside the worm gear (603). The bottom of the connecting column (14) has an external thread structure that matches the inside of the worm gear (603).

8. A connecting structure for a mechanically clamped cutting tool according to claim 1 or 5, characterized in that, The clamping plate (5) has a plurality of equidistant adjusting bolts (15) on one side, and the adjusting bolts (15) are threadedly engaged with the side wall of the clamping plate (5).

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