Novel tool holder automatic tool changing device suitable for large heavy-cutting turning machine tool

Abstract

The novel automatic tool changing device comprises a clamping body, a flange plate, a piston rod, a mandrel, a pull claw, a detection ring A, a switch a and a switch b, the flange plate is fixed to the top of the center of the clamping body, and the piston rod is installed in the center of the interior of the flange plate and the center of the interior of the clamping body; a mandrel in the vertical direction is installed at the center position of the lower portion in the clamping body, a pull claw is installed in an inner cavity of the mandrel, and the lower end of the piston rod is connected with the pull claw. The piston rod is sleeved with a detection ring A at the position close to the upper end of the piston rod, an L-shaped support is arranged between the detection ring A and the top of the flange plate, and a switch a and a switch b are installed on a vertical plate of the L-shaped support. Automatic tool changing of the tool holder of the large heavy-cutting turning machine tool is achieved, the connection part of the device and the ram is the same as that of a standard turning tool holder, and one set of device is provided with a tool holder grabbing mechanism, a tool holder clamping mechanism, an auxiliary tool loosening mechanism and a detection mechanism.

Description

Technical Field

[0001] The invention relates to a new type of tool holder automatic tool changing device suitable for a large-scale heavy-cutting turning machine tool, belonging to the technical field of machinery. Background Art

[0002] As the degree of machining automation increases, the application of automatic tool changing function of machine tools has become more and more popular. There are three main structures of automatic tool changing structure for pure turning machine tools: 1) An integrated turning and broaching spindle is installed inside the ram. The broaching spindle adopts a tool changing structure with a pull pin. The turning tool holder is automatically grabbed through the movement of the broaching spindle. The cutting force of the tool holder in this structure is limited by the pull pin of the broaching spindle, so the cutting force is small and suitable for small machine tools. 2) An integrated turning and broaching spindle is installed inside the ram. The broaching spindle adopts a T-block tool changing structure. The turning tool holder is automatically grabbed through the action of the broaching spindle. The cutting force of the tool holder in this structure is greater than that of the first one, but the T-block tool grabbing structure is limited. During the automatic tool changing process, an empty space must be reserved in the tool magazine to achieve tool changing, which wastes the tool magazine space. 3) An integrated turning and broaching tool spindle is installed inside the ram, and the tool holder clamping cylinder structure installed at the bottom of the ram can realize automatic grabbing of the turning tool holder. The cutting force of this structure is provided by the tool holder clamping cylinder installed at the bottom of the ram, which can realize large cutting force cutting, but the structure is complex, the assembly links are many, the tool holder has low versatility, and the cost is high. Summary of the invention

[0003] In order to overcome the shortcomings of the prior art, the present invention provides a new tool clamp automatic tool changing device suitable for large heavy-duty cutting turning machine tools. The device realizes automatic tool changing of the tool clamp of large heavy-duty cutting turning machine tools, and the connection part between the device and the slide is the same as the standard turning tool clamp, which improves the versatility of the product. A set of device is equipped with a tool clamp grasping mechanism, a tool clamp clamping mechanism, an auxiliary tool releasing mechanism and a detection mechanism.

[0004] The technical solution adopted by the present invention to solve its technical problems is: a new type of tool clamp automatic tool changing device suitable for large heavy-duty cutting turning machine tools, including a clamping body, a flange, a piston rod, a core shaft, a pull claw, a detection ring A, a switch a and a switch b, a flange is fixedly connected to the top at the center of the clamping body, and a vertical piston rod is installed at the inner center of the flange and the clamping body; a vertical core shaft is installed at the central position below the inside of the clamping body, a pull claw is installed in the internal cavity of the core shaft, and the lower end of the piston rod is connected to the pull claw.

[0005] A detection ring A is mounted on the piston rod at the upper end of the piston rod, an L-shaped bracket is arranged between the detection ring A and the top of the flange, and a switch a and a switch b are mounted on the vertical plate of the L-shaped bracket.

[0006] Four clamping oil cylinders with even intervals are horizontally arranged in the circumferential direction of the core shaft, and the clamping oil cylinders are all installed at the lower position inside the clamping body.

[0007] Further, switch a and switch b are arranged at intervals, and switch a is located above switch b.

[0008] Furthermore, a detection ring B is installed at the end of the clamping cylinder, and a switch c is installed above the end of the clamping cylinder.

[0009] Furthermore, an auxiliary loosening knife is installed on both sides of the bottom surface inside the clamping body.

[0010] Furthermore, a tool clamp detection switch is arranged on the bottom surface of the clamping body.

[0011] The beneficial effects of the present invention are as follows: in actual use, the present invention realizes large cutting force processing, reduces the empty space in the tool magazine, and reduces the difficulty of assembly and maintenance. A set of devices is equipped with a tool clamp grasping mechanism, a tool clamp clamping mechanism, an auxiliary tool loosening mechanism and a detection mechanism, so as to realize automatic tool changing of the tool clamp of a large heavy-duty cutting turning machine tool; while realizing automatic tool changing, simplifying the structure and reducing the cost, large cutting force cutting is realized, which solves the problem that in the past, when automatic tool changing was used, the cost of large cutting force was high, the tool magazine station was wasted or the large cutting force could not be realized. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] The present invention is further described below in conjunction with the accompanying drawings and specific embodiments.

[0013] Figure 1 It is a structural schematic diagram of the present invention.

[0014] Figure 2 It is a schematic diagram of the knife clamp detection switch of the present invention.

[0015] Numbers in the figure: 1. Clamping body, 2. Flange, 3. Piston rod, 4. Mandrel, 5. Pull claw, 6. Detection ring A, 7. Switch a, 8. Switch b, 9. Clamping cylinder, 10. Detection ring B, 11. Switch c, 12. Auxiliary tool release, 13. Tool clamp detection switch. DETAILED DESCRIPTION

[0016] like Figure 1—2 shows a new type of tool holder automatic tool changing device suitable for large heavy-duty cutting turning machine tools, comprising a clamping body 1, a flange 2, a piston rod 3, a core shaft 4, a pull claw 5, a detection ring A6, a switch a7 and a switch b8. A flange 2 is fixedly connected to the top at the center of the clamping body 1, and a vertical piston rod 3 is installed at the inner center of the flange 2 and the clamping body 1; a vertical core shaft 4 is installed at the central position of the lower part of the clamping body 1, and a pull claw 5 is installed in the inner cavity of the core shaft 4, and the lower end of the piston rod 3 is connected to the pull claw 5.

[0017] At the upper end of the piston rod 3, a detection ring A6 is mounted on the piston rod 3, an L-shaped bracket is arranged between the detection ring A6 and the top of the flange, and a switch a7 and a switch b8 are installed on the vertical plate of the L-shaped bracket; the switches a7 and b8 are arranged at intervals, and the switch a7 is located above the switch b8.

[0018] Four clamping cylinders 9 are arranged horizontally and evenly spaced in the circumferential direction of the core shaft 4. The clamping cylinders 9 are all installed at the lower position inside the clamping body 1; a detection ring B10 is installed at the end of the clamping cylinder 9, and a switch c11 is installed above the end of the clamping cylinder 9.

[0019] An auxiliary knife loosening device 12 is installed on both sides of the bottom surface inside the clamping body 1, and a knife clamp detection switch 13 is also installed on the bottom surface of the clamping body 1.

[0020] The flange 2, piston rod 3, core shaft 4 and claw 5 are installed in the clamping body 1 to form a gripping mechanism of the tool clamp; the detection ring A6 and switch a7, switch b8 constitute a gripping and releasing detection mechanism of the tool clamp; the clamping cylinder 9 is installed in the clamping body 1 to form a tool clamp clamping mechanism of a horizontal clamping form, and the detection ring B10 and switch c11 constitute the clamping and releasing detection mechanism of the tool clamp; the bottom surface of the clamping body 1 is installed with an auxiliary tool release 12 and a tool clamp detection switch 13.

[0021] The basic operating principle is: Tool clamp grabbing: Through hydraulic oil supply, the piston rod 3 of the tool clamp grabbing mechanism is pushed upward, pulling the claw 5 in the core shaft 4 upward to lift the tool clamp. After the switch a7 signal indicates that the tool clamp is in place, the hydraulic oil supply pushes the piston rod in the clamping cylinder 9 to move inward to clamp the tool clamp body. After the pressure relay indicates that the tool clamp is in place, the tool clamp grabbing action ends.

[0022] Tool clamp release: hydraulic oil supply pushes the piston rod in the clamping cylinder 9 to move outward to release the tool clamp body. After the switch c11 indicates that it is fully released, the hydraulic oil supply pushes the piston rod 3 of the tool clamp grasping mechanism to move downward, pulling the claw 5 in the core shaft 4 to move downward to release the tool clamp. After the switch b8 signal indicates that it is fully released, the tool clamp release action is completed.

[0023] An auxiliary tool loosening device 12 and a tool clamp detection switch 13 are installed under the clamping body 1. The auxiliary tool loosening device 12 improves the reliability of the tool loosening process. The tool clamp detection switch 13 detects whether there is a tool clamp under the slide to avoid the risk of tool collision caused by accessories under the slide, thereby improving the safety of the tool changing process.

Claims

1. A new type of automatic tool changing device for tool holders suitable for large heavy-duty cutting turning machine tools, characterized in that: The clamping body (1) comprises a clamping body (1), a flange (2), a piston rod (3), a core shaft (4), a claw (5), a detection ring A (6), a switch a (7) and a switch b (8), wherein a flange (2) is fixedly connected to the top of the center of the clamping body (1), and a piston rod (3) is installed in a vertical direction at the inner center of the flange (2) and the clamping body (1); a core shaft (4) is installed in a vertical direction at the lower center position of the clamping body (1), and a claw (5) is installed in the inner cavity of the core shaft (4), and the lower end of the piston rod (3) is connected to the claw (5); A detection ring A (6) is mounted on the piston rod (3) at a position slightly above the piston rod (3), an L-shaped bracket is arranged between the detection ring A (6) and the top of the flange, and a switch a (7) and a switch b (8) are mounted on a vertical plate of the L-shaped bracket; Four clamping oil cylinders (9) are arranged horizontally and evenly spaced in the circumferential direction of the core shaft (4), and the clamping oil cylinders (9) are all installed at the lower position inside the clamping body (1).

2. According to claim 1, a new type of tool holder automatic tool changing device suitable for large-scale heavy-duty cutting turning machine tools is characterized in that: The switch a (7) and the switch b (8) are arranged at an interval, and the switch a (7) is located above the switch b (8).

3. According to claim 1, a new type of tool holder automatic tool changing device suitable for large heavy cutting turning machine tools is characterized in that: A detection ring B (10) is installed at the end of the clamping oil cylinder (9), and a switch c (11) is installed above the end of the clamping oil cylinder (9).

4. According to claim 1, a new type of automatic tool changing device for tool holders suitable for large-scale heavy-duty cutting turning machine tools is characterized in that: An auxiliary loosening knife (12) is installed on both sides of the bottom surface inside the clamping body (1).

5. The new tool holder automatic tool changing device suitable for large heavy cutting turning machine tools according to claim 1 is characterized in that: A tool clamp detection switch (13) is also mounted on the bottom surface of the clamping body (1).

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