An automatic intelligent tool mounting device and control method suitable for a numerical control tool holder

Abstract

The application relates to the technical field of machining, and discloses an automatic intelligent tool mounting device suitable for a numerical control tool holder and a control method, which can realize automatic tool mounting in the whole process without personnel intervention, controls the movement and stop of each part through a control unit, can accurately control the tool mounting length of a tool through a fourth signal detection unit, and can accurately control the tightening torque of a tool holder nut through a torque sensor which converts the received force into an electric signal and feeds back the electric signal to the control unit. The application solves a series of problems such as tool deflection, poor machining quality, short tool life, tool holder interference with parts, damage of parts caused by unstable tool holding, difficulty in unloading caused by too tight tool holding, personal injury during tool mounting and the like caused by improper length of numerical control tool clamping and improper tightening torque of the tool holder nut.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of machining, and discloses an automatic intelligent tool mounting device suitable for a numerical control tool holder and a control method. BACKGROUND

[0002] In a machining process, tool mounting needs to be manually performed, currently, a caliper or a tool setting instrument is used to ensure tool overhang length and pre-tighten a nut, and then a wrench is used to tighten the nut on a tool mounting table:

[0003] 1. The tool overhang length is difficult to completely meet machining requirements: if the tool overhang length is too long, tool let go is serious, machining quality is poor, and tool life is short; if the tool overhang length is too short, the tool holder is prone to interfere with a machined part, causing damage to the part or even scrapping.

[0004] 2. The locking torque of the locking nut cannot be ensured by using a wrench: if the locking torque is too large, the locking nut and the tool holder are prone to be damaged, and when the tool is unloaded, time and effort are wasted, and personal injury is prone to occur; if the locking torque is too small, the tool is unstable, the tool swings greatly, and the tool is prone to fall off during machining, causing damage to the part or even scrapping. SUMMARY

[0005] The application aims to provide an automatic intelligent tool mounting device suitable for a numerical control tool holder and a control method, which can realize automatic tool mounting in the whole process without human intervention, and solve a series of problems caused by improper numerical control tool mounting, such as serious tool let go, poor machining quality, short tool life, tool holder interference with a part, unstable tool holding, damage to a part, difficult unloading of the tool, and personal injury during tool mounting.

[0006] In order to achieve the above technical effects, the application adopts the following technical scheme:

[0007] An automatic intelligent tool mounting device suitable for a numerical control tool holder, comprising:

[0008] a base and a control unit, and

[0009] a tool holder support arranged on the base; a first clamping assembly is arranged on the tool holder support, and the first clamping assembly is used for clamping a numerical control tool holder; a rotary driving assembly is arranged on the tool holder support, and the rotary driving assembly is used for controlling the first clamping assembly to rotate along a central axis of the numerical control tool holder;

[0010] a first signal detection unit used for detecting whether there is an object on the first clamping assembly and transmitting a detected signal to the control unit;

[0011] a tool support arranged on the base; a positioning assembly is arranged on the tool support, and the positioning assembly is used for fixing a numerical control tool and coaxially arranging the numerical control tool and the numerical control tool holder;

[0012] A second signal detection unit is configured to detect whether there is an object on the positioning assembly and transmit a detected signal to the control unit.

[0013] A first driving assembly is configured to drive the tool holder to move axially along the numerical control tool shank.

[0014] A nut holder is arranged on the base and located between the tool shank holder and the tool holder; a second clamping assembly is arranged on the nut holder and configured to fix and clamp the tool shank nut.

[0015] A third signal detection unit is configured to detect whether there is an object on the second clamping assembly and transmit a detected signal to the control unit.

[0016] A second driving assembly is configured to drive the nut holder to move axially along the numerical control tool shank.

[0017] The control unit is configured to control the opening and closing of the first driving assembly, the second driving assembly, the rotating driving assembly, the first clamping assembly, the positioning assembly, and the second clamping assembly, respectively.

[0018] A fourth signal detection unit is in communication connection with the control unit and configured to detect whether the tool holder reaches a first preset position where the numerical control tool cooperates with the numerical control tool shank, and to detect whether the nut holder reaches a second preset position where the tool shank nut cooperates with the numerical control tool shank.

[0019] Further, a sliding groove is arranged on the base, and the tool shank holder, the tool holder, and the nut holder are slidingly installed in the sliding groove; the first driving assembly and the second driving assembly each include a lead screw, and the lead screws are arranged in cooperation with the tool shank holder and the tool holder, respectively; and each lead screw is provided with a driving motor configured to drive the lead screw to rotate.

[0020] Further, the positioning assembly includes an electromagnetic coil and a fifth signal detection unit, and the control unit further includes a power supply module; the fifth signal detection unit detects position information of the numerical control tool and transmits the position information to the control unit; and the power supply module supplies power to the electromagnetic coil according to the position information transmitted by the fifth signal detection unit, so that the electromagnetic coil controls the numerical control tool to hover on the tool holder and makes the numerical control tool coaxial with the numerical control tool shank.

[0021] Further, the second clamping assembly includes:

[0022] A mounting groove is arranged on the nut holder.

[0023] A cover plate is arranged on the nut holder and configured to cover the mounting groove; and the cover plate and the mounting groove jointly form a mounting cavity.

[0024] The inflation inner tube is arranged in the mounting cavity and coaxially arranged with the numerical control tool holder, and the two side end faces of the inflation inner tube are in contact with the bottom of the mounting groove and the cover plate respectively; a plurality of force transmission rods are uniformly arranged on the inner side of the inflation inner tube in a ring shape, and a torque sensor is arranged on each force transmission rod.

[0025] The air guide pipe is in communication with the mounting cavity at one end, and in communication with the air pump at the other end; the end of the air guide pipe in communication with the mounting cavity is located on the outer side of the inflation inner tube.

[0026] Further, the second clamping assembly further comprises a limiting ring arranged in the mounting cavity, and the limiting ring is coaxially arranged on the inner side of the inflation inner tube; the limiting ring is provided with a limiting hole for the force transmission rod to pass through at a position corresponding to each force transmission rod, and a spring is sleeved on the outer wall of each force transmission rod and is pressed, one end of each spring is in contact with the inner wall of the inflation inner tube, and the other end is in contact with the outer wall of the limiting ring.

[0027] In order to realize the above technical effects, the application further provides an automatic intelligent tool loading control method suitable for a numerical control tool holder, which is based on the automatic intelligent tool loading device and comprises the following steps:

[0028] The control unit respectively acquires signals transmitted by the first signal detection unit, the second signal detection unit and the third signal detection unit, and controls the first clamping assembly and the second clamping assembly to clamp when the first signal detection unit, the second signal detection unit and the third signal detection unit simultaneously detect an object, and controls the positioning assembly to suspend the object on the tool support;

[0029] The control unit controls the first driving assembly to start, so that the tool support moves towards the tool holder support, and the control unit closes the first driving assembly when the fourth signal detection unit detects that the tool support reaches a first preset position;

[0030] The control unit controls the rotation driving assembly and the second driving assembly to start, so that the rotation driving assembly drives the numerical control tool holder to rotate, and the second driving assembly drives the nut support to move towards the tool holder support, and the control unit closes the rotation driving assembly and the second driving assembly when the fourth signal detection unit detects that the nut support reaches a second preset position, thereby completing the tool loading.

[0031] Further, the control unit further comprises a warning module, and the second clamping assembly is further provided with a torque sensor, the torque sensor is used for detecting the torque value in the process that the rotation driving assembly rotates the numerical control tool holder, and transmits the detection data to the control unit, and the warning module sends a prompt signal when the torque value after completing the tool loading is greater than or less than a preset range.

[0032] Further, the positioning assembly comprises an electromagnetic coil and a fifth signal detection unit, and the control unit further comprises a power supply module; the fifth signal detection unit detects position information of the numerical control tool and transmits the position information to the control unit; and the power supply module supplies power to the electromagnetic coil according to the position information transmitted by the fifth signal detection unit, so that the electromagnetic coil controls the numerical control tool to hover on the tool support and makes the numerical control tool coaxial with the numerical control tool handle.

[0033] Compared with the prior art, the present application has the beneficial effects that: the control unit controls the movement and stop of each part, and the fourth signal detection unit can accurately control the tool mounting length, solving a series of problems such as serious tool let-in, poor machining quality, short tool life, interference of tool handle with parts, damage of parts due to unstable tool holding, difficulty in unloading due to too tight tool holding, and personal injury during tool mounting. BRIEF DESCRIPTION OF DRAWINGS

[0034] Figure 1 It is an automatic intelligent tool mounting device structure diagram suitable for a numerical control tool handle in the embodiment;

[0035] Figure 2 It is a three-dimensional structure diagram of the automatic intelligent tool mounting device suitable for the numerical control tool handle in the embodiment;

[0036] Figure 3 It is a structure block diagram of each control unit and its connecting piece in the embodiment;

[0037] Figure 4 It is a position relationship diagram of the nut support and the inflatable inner tube in the embodiment;

[0038] Among them, 1, base; 2, control unit; 3, handle support; 4, first clamping assembly; 5, numerical control handle; 6, rotary drive assembly; 7, first signal detection unit; 8, tool support; 9, positioning assembly; 10, numerical control tool; 11, second signal detection unit; 12, first drive assembly; 13, nut support; 14, second clamping assembly; 15, handle nut; 16, third signal detection unit; 17, second drive assembly; 18, fourth signal detection unit; 19, sliding groove; 20, early warning module; 21, electromagnetic coil; 22, fifth signal detection unit; 23, power supply module; 24, mounting groove; 25, cover plate; 26, inflatable inner tube; 27, force transmission rod; 28, air guide pipe; 29, limiting ring; 30, spring. DETAILED DESCRIPTION

[0039] The present application will be further described in conjunction with the embodiments and the drawings. However, it should not be understood that the scope of the above-mentioned subject matter of the present application is limited to the following embodiments, and any technology realized based on the content of the present application belongs to the scope of the present application.

[0040] Embodiment

[0041] Reference Figures 1-4 An automatic intelligent tool mounting device suitable for a numerical control tool holder, comprising:

[0042] a base 1 and a control unit 2, and

[0043] a tool holder support 3 arranged on the base 1; a first clamping assembly 4 is arranged on the tool holder support 3, and the first clamping assembly 4 is used for clamping a numerical control tool holder 5; a rotary driving assembly 6 is arranged on the tool holder support 3, and the rotary driving assembly 6 is used for controlling the first clamping assembly 4 to rotate along the central axis of the numerical control tool holder 5;

[0044] a first signal detection unit 7 is used for detecting whether there is an object on the first clamping assembly 4, and transmitting the detected signal to the control unit 2;

[0045] a tool support 8 is arranged on the base 1; a positioning assembly 9 is installed on the tool support 8, and the positioning assembly 9 is used for fixing a numerical control tool 10 and coaxially arranging the numerical control tool 10 with the numerical control tool holder 5;

[0046] a second signal detection unit 11 is used for detecting whether there is an object on the positioning assembly 9, and transmitting the detected signal to the control unit 2;

[0047] a first driving assembly 12 is used for driving the tool support 8 to move axially along the numerical control tool holder 5;

[0048] a nut support 13 is arranged on the base 1 and located between the tool holder support 3 and the tool support 8; a second clamping assembly 14 is arranged on the nut support 13, and the second clamping assembly 14 is used for fixing a tool holder nut 15;

[0049] a third signal detection unit 16 is used for detecting whether there is an object on the second clamping assembly 14, and transmitting the detected signal to the control unit 2;

[0050] a second driving assembly 17 is used for driving the nut support 13 to move axially along the numerical control tool holder 5;

[0051] the control unit 2 is used for controlling the opening and closing of the first driving assembly 12, the second driving assembly 17, the rotary driving assembly 6, the first clamping assembly 4, the positioning assembly 9, and the second clamping assembly 14, respectively;

[0052] a fourth signal detection unit 18 is in communication connection with the control unit 2, and is used for detecting whether the tool support 8 reaches a first preset position where the numerical control tool 10 cooperates with the numerical control tool holder 5, and detecting whether the nut support 13 reaches a second preset position where the tool holder nut 15 cooperates with the numerical control tool holder 5.

[0053] In the embodiment, when the numerical control tool 10 needs to be installed, first, the numerical control tool handle 5 is placed on the first clamping assembly 4 of the tool handle support 3, the numerical control tool 10 is placed on the positioning assembly 9 of the tool support 8, and the tool handle nut 15 is placed on the second clamping assembly 14 of the nut support 13; at this time, the first signal detection unit 7, the second signal detection unit 11 and the third signal detection unit 16 simultaneously detect the presence of an object, and the control unit 2 is provided with a control chip and a circuit to control the first clamping assembly 4 and the second clamping assembly 14 to clamp, and control the positioning assembly 9 to suspend the object on the tool support 8;

[0054] Then, the control unit 2 controls the first driving assembly 12 to start, and the tool support 8 moves towards the tool handle support 3; when the fourth signal detection unit 18 detects that the tool support 8 reaches the first preset position, the control unit 2 closes the first driving assembly 12; the control unit 2 controls the rotation driving assembly 6 and the second driving assembly 17 to start, the rotation driving assembly 6 drives the numerical control tool handle 5 to rotate, and the second driving assembly 17 drives the nut support 13 to move towards the tool handle support 3; when the fourth signal detection unit 18 detects that the nut support 13 reaches the second preset position, the control unit 2 closes the rotation driving assembly 6 and the second driving assembly 17, and the installation of the tool is completed.

[0055] The automatic intelligent tool installation device in the embodiment can realize full-process automatic tool installation without human intervention, controls the movement and stop of each part through the control unit 2, and accurately controls the tool installation length through the fourth signal detection unit 18, thereby solving a series of problems such as serious tool let-in, poor machining quality, short tool life, interference of tool handles with parts, damage of parts due to unstable tool holding, difficulty in unloading due to over-tight tool holding, and personal injury during tool installation.

[0056] In the embodiment, the numerical control tool handle 5 is installed on the tool handle support 3 through a bearing. The base 1 is provided with a sliding groove 19, and the tool handle support 3, the tool support 8 and the nut support 13 are slidingly installed in the sliding groove 19; the first driving assembly 12 and the second driving assembly 17 each include a lead screw, and the lead screws are respectively arranged in cooperation with the tool handle support 3 and the tool support 8, and each lead screw is provided with a driving motor for driving the rotation of the lead screw. The corresponding driving assembly is driven by the lead screw, so that the position adjustment can be realized, and the position locking can be realized after reaching the corresponding position, thereby meeting the self-locking function after reaching the corresponding position.

[0057] In the embodiment, the positioning assembly 9 comprises an electromagnetic coil 21 and a fifth signal detection unit 22, the control unit 2 further comprises a power supply module 23, the fifth signal detection unit 22 detects the position information of the numerical control tool 10 and transmits the position information to the control unit 2, the power supply module 23 supplies power to the electromagnetic coil 21 according to the position information transmitted by the fifth signal detection unit 22, so that the electromagnetic coil 21 controls the numerical control tool 10 to hover on the tool support 8, and the numerical control tool 10 is coaxial with the numerical control tool handle 5.

[0058] In the embodiment, the second clamping assembly 14 comprises:

[0059] A mounting groove 24 is arranged on the nut support 13;

[0060] A cover plate 25 is arranged on the nut support 13, used for covering the mounting groove 24, and the cover plate 25 and the mounting groove 24 form a mounting cavity;

[0061] An inflatable inner tube 26 is arranged in the mounting cavity, and the inflatable inner tube 26 is coaxially arranged with the numerical control tool handle 5, and the two side end faces of the inflatable inner tube 26 are in contact and sealed with the bottom of the mounting groove 24 and the cover plate 25; a plurality of force transmission rods 27 are uniformly arranged on the inner side of the inflatable inner tube 26, and a torque sensor is arranged on each force transmission rod 27;

[0062] A gas guide pipe 28 is arranged in communication with the mounting cavity, and the other end of the gas guide pipe 28 is in communication with a gas pump; the end of the gas guide pipe 28 in communication with the mounting cavity is located outside the inflatable inner tube 26.

[0063] The second clamping assembly 14 further comprises a limiting ring 29 arranged in the mounting cavity, and the limiting ring 29 is coaxially arranged on the inner side of the inflatable inner tube 26; the limiting ring 29 is provided with a limiting hole corresponding to each force transmission rod 27, and each force transmission rod 27 is provided with a compressed spring 30, one end of each spring 30 is in contact with the inner wall of the inflatable inner tube 26, and the other end is in contact with the outer wall of the limiting ring 29.

[0064] The control unit 2 adjusts the electromagnetic valve to open the air duct 28, controls the air pump to start, and fills the air to the inflatable inner tube 26 through the air duct 28, at this time, the force bar 27 moves along the limiting hole to clamp the tool holder nut 15. Then the control unit 2 closes the electromagnetic valve and the air pump, and realizes the clamping of the tool holder nut 15. The setting of the torque sensor on the force bar 27 can convert the torque of the tool holder nut 15 into an electric signal and feed back to the control unit 2, so as to accurately control the tightening torque of the tool holder nut 15, and further avoid a series of problems caused by the improper tightening torque of the tool holder nut 15, such as serious tool let go, poor machining quality, short tool life, tool holder interference with parts, unstable tool clamping and damage to parts, and difficult unloading due to too tight tool clamping.

[0065] The above only describes the preferred embodiments of the present application and is not intended to limit the present application. Any modification, equivalent replacement and improvement within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. An automatic intelligent tool loading device suitable for numerical control tool shank, characterized in that, The utility model relates to a numerical control tool holder, including: Base (1) and control unit (2), and Tool handle support (3) are set up on base (1), first clamping component (4) are set up on tool handle support (3), and first clamping component (4) are used for clamping numerical control tool handle (5), rotary drive assembly (6) are set up on tool handle support (3), and rotary drive assembly (6) are used for controlling first clamping component (4) rotation along the axis of numerical control tool handle (5), First signal detection unit (7) is used for detecting whether there is object on first clamping component (4) and passes the signal of detection to control unit (2), Tool support (8) are set up on base (1), positioning assembly (9) are installed on tool support (8), positioning assembly (9) are used for fixing numerical control tool (10) and make numerical control tool (10) with numerical control tool handle (5) coaxial, Second signal detection unit (11) is used for detecting whether there is object on positioning assembly (9) and passes the signal of detection to control unit (2), First drive assembly (12) is used for driving tool support (8) along numerical control tool handle (5) axial movement, Nut support (13) are set up on base (1) and are located between tool handle support (3) and tool support (8), second clamping component (14) are set up on nut support (13), and second clamping component (14) are used for fixedly clamping tool handle nut (15), second clamping component (14) include: Mounting groove (24) are set up on nut support (13), Cover plate (25) are installed on nut support (13) and are used for covering mounting groove (24), and cover plate (25) and mounting groove (24) form mounting cavity, Inflatable inner tube (26) are set up in mounting cavity, and inflatable inner tube (26) are coaxially arranged with numerical control tool handle (5), and the both side end surfaces of inflatable inner tube (26) are in contact with the bottom of mounting groove (24) and cover plate (25) and are sealed, and a plurality of force rods (27) are evenly arranged on the inner side of inflatable inner tube (26), and torque sensor are arranged on each force rod (27), Air pipe (28) one end with mounting cavity communication, the other end of air pipe (28) with gas pump communication, and the end of air pipe (28) with mounting cavity communication is located on the outside of inflatable inner tube (26), Second clamping component (14) still include the limiting ring (29) that sets up in mounting cavity, and limiting ring (29) is coaxially arranged in the inner side of inflatable inner tube (26), limiting hole that can pass through force rod (27) is arranged at the position of each force rod (27) of limiting ring (29), and the spring (30) of being pressed is sleeved on the outer wall of each force rod (27), and one end of each spring (30) is in contact with the inner wall of inflatable inner tube (26), and the other end is in contact with the outer wall of limiting ring (29). A third signal detection unit (16) is arranged on the base (1) and used for detecting whether there is an object on the second clamping assembly (14) and transmitting a detection signal to the control unit (2); A second driving assembly (17) is arranged on the base (1) and used for driving the nut support (13) to move along the numerical control tool handle (5) in the axial direction; The control unit (2) is used for controlling the first driving assembly (12), the second driving assembly (17), the rotary driving assembly (6), the first clamping assembly (4), the positioning assembly (9) and the second clamping assembly (14) to open and close, respectively. A fourth signal detection unit (18) is in communication connection with the control unit (2) and used for detecting whether the tool support (8) reaches a first preset position where the numerical control tool (10) is matched with the numerical control tool handle (5) and detecting whether the nut support (13) reaches a second preset position where the tool handle nut (15) is matched with the numerical control tool handle (5).

2. The automated smart knife donning device of claim 1, wherein, The base (1) is provided with a sliding groove (19), and the tool handle support (3), the tool support (8) and the nut support (13) are slidingly installed in the sliding groove (19); the first driving assembly (12) and the second driving assembly (17) each include a lead screw, and the lead screws are arranged in matched manner with the tool handle support (3) and the tool support (8) respectively, and each lead screw is provided with a driving motor for driving the lead screw to rotate.

3. The automated smart knife donning device of claim 1, wherein, The positioning assembly (9) includes an electromagnetic coil (21) and a fifth signal detection unit (22), the control unit (2) further includes a power supply module (23), the fifth signal detection unit (22) detects position information of the numerical control tool (10) and transmits the position information to the control unit (2), and the power supply module (23) supplies power to the electromagnetic coil (21) according to the position information transmitted by the fifth signal detection unit (22), so that the electromagnetic coil (21) controls the numerical control tool (10) to hover on the tool support (8) and makes the numerical control tool (10) coaxial with the numerical control tool handle (5).

4. An automatic intelligent tool loading control method suitable for a numerical control tool holder, the method being based on the automatic intelligent tool loading device according to any one of claims 1-3, characterized in that, The control unit (2) respectively acquires signals transmitted by the first signal detection unit (7), the second signal detection unit (11) and the third signal detection unit (16), controls the first clamping assembly (4) and the second clamping assembly (14) to clamp when the first signal detection unit (7), the second signal detection unit (11) and the third signal detection unit (16) simultaneously detect that there is an object, and controls the positioning assembly (9) to make the object hover on the tool support (8); The control unit (2) controls the first driving assembly (12) to start, so that the tool support (8) moves towards the tool handle support (3), and when the fourth signal detection unit (18) detects that the tool support (8) reaches the first preset position, the control unit (2) closes the first driving assembly (12); The control unit (2) controls the first driving assembly (12) to start, so that the tool support (8) moves towards the tool handle support (3), and when the fourth signal detection unit (18) detects that the tool support (8) reaches the first preset position, the control unit (2) closes the first driving assembly (12); The control unit (2) controls the starting of the rotary driving assembly (6) and the second driving assembly (17), so that the rotary driving assembly (6) drives the numerical control tool handle (5) to rotate, and the second driving assembly (17) drives the nut support (13) to move towards the tool handle support (3), when the fourth signal detection unit (18) detects that the nut support (13) reaches the second preset position, the control unit (2) closes the rotary driving assembly (6) and the second driving assembly (17), and the tool mounting is completed.

5. The automated intelligent tool changer control method of claim 4, wherein, The control unit (2) further comprises a pre-warning module (20), and a torque sensor is further arranged in the second clamping assembly (14), the torque sensor is used for detecting the torque value in the process that the rotary driving assembly (6) rotates the numerical control tool handle (5), and the detection data is transmitted to the control unit (2), when the torque value after the tool mounting is completed is greater than or less than a preset range, the pre-warning module (20) issues a prompt signal.

6. The automated smart knife control method of claim 4, wherein, The positioning assembly (9) comprises an electromagnetic coil (21) and a fifth signal detection unit (22), the control unit (2) further comprises a power supply module (23), the fifth signal detection unit (22) detects the position information of the numerical control tool (10) and transmits the position information to the control unit (2), the power supply module (23) supplies power to the electromagnetic coil (21) according to the position information transmitted by the fifth signal detection unit (22), so that the electromagnetic coil (21) controls the numerical control tool (10) to hover on the tool support (8), and the numerical control tool (10) is coaxial with the numerical control tool handle (5).

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