Pneumatic control system of machine tool

Abstract

The utility model discloses a machine tool pneumatic control system, and belongs to the technical field of machine tool pneumatic control. The device comprises an air source assembly, an air blowing branch and a control valve bank, the control valve bank comprises a main loop located between the air source assembly and the air blowing branch, and the main loop is provided with a first pneumatic control valve to control opening and closing of the air blowing branch; the time delay loop is located between the air source assembly and the first air control valve, a second air control valve and a time delay valve set are arranged on the time delay loop, and an output port of the time delay valve set is communicated to an air control port of the first air control valve; the slow starting loop is located between the air source assembly and the second air control valve, a slow starting valve set is arranged on the slow starting loop, and an output port of the slow starting valve set is communicated with an air control port of the second air control valve. According to the utility model, blowing can be stopped in a delayed manner when the machine tool is overhauled.

Description

Technical Field

[0001] The utility model relates to the technical field of machine tools, in particular to a machine tool air control system. Background Art

[0002] In the machine tool industry, machining centers usually have many functional modules, such as the opening and closing of rolling doors, loosening and clamping of turntables, air sealing of electric spindles, air sealing of turntables, air blowing of tool centers, air blowing of spindles, air blowing of gratings, etc. Among them, the air blowing function of the spindle achieves a cleaning effect through the impact of high-speed airflow, and can also blow away the chips generated during processing to avoid wear on the machinery and affect the processing effect; in addition, in order to prevent chips and cutting fluid from entering the grating ruler during processing, the grating ruler also has an air blowing function to ensure the data feedback accuracy of the grating ruler. If the machine tool suddenly loses power during operation, or the spindle and grating are powered off for maintenance and debugging, in order to ensure the normal operation of other functional modules, the main air source is usually not closed, so that the air blowing branch will continue to blow, resulting in energy waste. At the same time, in order to ensure processing accuracy and improve product quality, it is necessary to extend a period of time to cool and clean the spindle, etc., and then turn off the air blowing function. Utility Model Content

[0003] To this end, the utility model proposes an air control system for delayed shutoff of air blowing during machine tool maintenance, which can delay the arrival time of the air pressure signal. When the ventilation time reaches the set time, the air circuit is connected, thereby delaying the time for the gas to reach the air control valve of the blowing branch.

[0004] In view of the above technical problems, the utility model provides the following technical solutions:

[0005] A machine tool pneumatic control system comprises: an air source component, an air blowing branch and a control valve group, wherein the control valve group comprises: a main circuit located between the air source component and the air blowing branch, wherein the main circuit is provided with a first air control valve to control the switch of the air blowing branch; a delay circuit located between the air source component and the first air control valve, wherein the delay circuit is provided with a second air control valve and a delay valve group, wherein the output port of the delay valve group is connected to the air control port of the first air control valve; a slow start circuit located between the air source component and the second air control valve, wherein the slow start circuit is provided with a slow start valve group, wherein the output port of the slow start valve group is connected to the air control port of the second air control valve.

[0006] In some embodiments of the utility model, the slow-start valve group includes a first solenoid valve, a third air-controlled valve, a fourth air-controlled valve and a first one-way throttle valve, the output end of the air source assembly is connected to the input ports of the first solenoid valve and the third air-controlled valve, the output port of the first solenoid valve is connected to the air-controlled port of the third air-controlled valve, the fourth air-controlled valve includes a first air-controlled port and a second air-controlled port, the output port of the third air-controlled valve is connected to the first air-controlled port of the fourth air-controlled valve, the output port of the third air-controlled valve is connected to the second air-controlled port of the fourth air-controlled valve through the first one-way throttle valve, and the output port of the fourth air-controlled valve is connected to the air-controlled port of the second air-controlled valve.

[0007] In some embodiments of the utility model, the delay valve group includes a second one-way throttle valve, a first gas tank and a fifth gas-controlled valve which are connected in sequence, the output port of the second gas-controlled valve is connected to the input port of the second one-way throttle valve, the output port of the second gas-controlled valve is also connected to the input port of the fifth gas-controlled valve, and the output port of the fifth gas-controlled valve is connected to the gas-controlled port of the first gas-controlled valve.

[0008] In some implementation modes of the utility model, the delay circuit is further provided with a second gas tank, and the second gas tank is connected to the pipeline between the first gas tank and the fifth gas control valve.

[0009] In some embodiments of the utility model, when the machine tool is in working state, the first air-controlled valve is in an on state; the second air-controlled valve is initially in an on state, and the first gas tank and the second gas tank are inflated, and the fifth air-controlled valve is in an off state; the first solenoid valve is in an on state, the third air-controlled valve is in an on state, and the fourth air-controlled valve is turned on after a first set time, so that the second air-controlled valve is in a closed state, and the delay circuit is cut off.

[0010] In some embodiments of the utility model, when the machine tool is powered off, the first solenoid valve is in an off state, the third air-controlled valve is in an off state, and the second air-controlled valve is in an on state; after a second set time, the fifth air-controlled valve is on and the first air-controlled valve is off.

[0011] In some implementations of the utility model, the air source assembly includes a residual pressure release valve and a filter pressure reducing valve, and the air source assembly is connected to the main circuit, the delay circuit and the slow start circuit through a manifold block.

[0012] In some implementations of the utility model, the air blowing branch includes a machine tool air blowing branch, a grating air blowing branch, a spindle air blowing branch and a B-axis air seal air blowing branch which are connected in parallel.

[0013] In some embodiments of the utility model, the machine tool air blowing branch, the grating air blowing branch, the spindle air blowing branch and the B-axis air seal air blowing branch are respectively provided with pressure reducing valves, the grating air blowing branch, the spindle air blowing branch and the B-axis air seal air blowing branch are provided with oil mist separators and micro mist separators, and the grating air blowing branch is provided with a deodorizing filter.

[0014] In some implementations of the utility model, the time-delay valve group is integrated into one body, and the time-delay valve group is provided with a control knob for setting the delay time; the slow-start valve group is integrated into one body.

[0015] The technical solution of the utility model has the following technical effects compared with the prior art:

[0016] In the machine tool air control system provided by the utility model, when the machine tool is in normal working state, air flows to the blowing branch through the first air control valve, so that the normal blowing operation of the blowing branch is realized; the slow start valve in the slow start circuit controls the delay circuit to be in a closed state; when the machine tool is powered off, the slow start valve of the slow start circuit controls the switching state of the second air control valve, so that the delay circuit is in an open state, and the first air control valve switches the state under the action of the delay valve group, thereby realizing the delayed closing of the blowing branch when the machine tool is powered off. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings, which will help to understand the purpose and advantages of the present invention, wherein:

[0018] Figure 1 The system schematic diagram is a specific implementation scheme of the machine tool air control system of the utility model.

[0019] Figure 2 This is a structural diagram of a specific implementation of a slow-start valve group in a machine tool air control system of the utility model;

[0020] Figure 3 It is a structural diagram of a specific implementation of the time delay valve group in the machine tool air control system of the utility model. DETAILED DESCRIPTION

[0021] The technical solution of the utility model will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0022] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0023] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0024] In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0025] like Figure 1 The figure shows a specific implementation of the machine tool air control system of the utility model, which is used to control air blowing at different working positions of the machine tool, including machine tool air blowing, spindle air blowing, grating air blowing and B-axis air seal air blowing.

[0026] The machine tool pneumatic control system includes an air source component 10, an air blowing branch 20 and a control valve group 30, wherein the control valve group 30 includes a main circuit 31 located between the air source component 10 and the air blowing branch 20, wherein the main circuit 31 is provided with a first air control valve 34 to control the switch of the air blowing branch 20; a delay circuit 32 located between the air source component 10 and the first air control valve 34, wherein the delay circuit 32 is provided with a second air control valve 35 and a delay valve group 37, wherein the output port of the delay valve group 37 is connected to the air control port of the first air control valve 34; a slow start circuit 33 located between the air source component 10 and the second air control valve 35, wherein the slow start circuit 33 is provided with a slow start valve group 36, wherein the slow start valve group 36 is used to supply air at a low speed when the pressure rises slowly, wherein the output port of the slow start valve group 36 is connected to the air control port of the second air control valve 35.

[0027] When the machine tool is in normal working condition, air passes through the air source assembly 10 and the first air-controlled valve 34 to flow to the blowing branch 20, so that devices such as machine tool blowing, spindle blowing, and grating blowing can be opened; in the delay circuit 32, the gas is first in a conducting state through the second air-controlled valve 35 and supplies gas to the delay valve group 37; after the slow-start valve in the slow-start circuit 33 is slowly opened, the output gas flows to the pilot port of the second air-controlled valve 35, and the second air-controlled valve 35 switches direction so that the second air-controlled valve 35 is closed, and the delay circuit 32 is cut off. When the machine tool is powered off, the slow start valve loses power, the air source flowing to the pilot port of the second air control valve 35 is cut off, the second air control valve 35 switches direction, and the gas flows to the delay valve group 37 through the second air control valve 35. When the delay valve group 37 reaches the set time, the port opens, and the gas flows to the pilot port of the first air control valve 34 through the output port of the delay valve group 37, so that the first air control valve 34 switches direction and is in a disconnected state, thereby realizing the delayed closing of the blowing branch 20 when the machine tool is powered off.

[0028] Among them, in an optional implementation manner, as Figure 2 As shown, the slow start valve group 36 includes a first solenoid valve 361, a third air-controlled valve 362, a fourth air-controlled valve 363 and a first one-way throttle valve 364; the output end of the air source component 10 is connected to the input ports of the first solenoid valve 361 and the third air-controlled valve 362, the output port of the first solenoid valve 361 is connected to the air-controlled port of the third air-controlled valve 362, the fourth air-controlled valve 363 includes a first air-controlled port and a second air-controlled port, the output port of the third air-controlled valve 362 is connected to the first air-controlled port of the fourth air-controlled valve 363, the output port of the third air-controlled valve 362 is connected to the second air-controlled port of the fourth air-controlled valve 363 through the first one-way throttle valve 364, and the output port of the fourth air-controlled valve 363 is connected to the air-controlled port of the second air-controlled valve 35. In one implementation, the slow start valve group 36 is integrated into one body. More specifically, the slow start valve group 36 adopts AV2000, AV3000, AV4000, AV5000 series slow start solenoid valves of SMC.

[0029] Specifically, in an optional implementation manner, Figure 3As shown, the delay valve group 37 includes a second one-way throttle valve 371, a first gas tank 372 and a fifth gas control valve 373 which are connected in sequence. The above valve groups are integrated into one body, and a control knob for setting the delay time is provided on the shell of the delay valve group 37. Among them, the output port of the second gas control valve 35 is connected to the input port of the second one-way throttle valve 371, and the output port of the second gas control valve 35 is also connected to the input port of the fifth gas control valve 373, and the output port of the fifth gas control valve 373 is connected to the gas control port of the first gas control valve 34. The delay time can be set by rotating the setting knob. The delay valve group 37 can delay the arrival time of the air pressure signal according to the combination of variable throttling and the fixed gas volume of the first gas tank 372. More specifically, the delay valve group 37 adopts the VR2110 series delay valve of SMC.

[0030] In order to obtain a wider delay time adjustment, the delay circuit 32 is further provided with a second gas tank 38, which is connected to the pipeline between the first gas tank 372 and the fifth gas control valve 373. The second gas tank 38 is an auxiliary gas volume, so that the capacity of the delay valve group is greater than the capacity of the first gas tank 372. According to the combination of the first gas tank 372 and the second gas tank 38, the arrival time of the air pressure signal can be delayed longer.

[0031] Specifically, in an optional embodiment, the gas source assembly 10 includes a residual pressure release valve 11 and a filter pressure reducing valve 12. The residual pressure release valve 11 is a two-position three-way manual valve, which is used to control the on-off of the entire gas circuit and handle the residual pressure; in the initial state, the residual pressure release valve 11 is in an off state; the filter pressure reducing valve 12 eliminates moisture and dust in the total gas source and is used to control the pressure of the gas source. The gas source assembly 10 is connected to the main circuit 31, the delay circuit 32 and the slow start circuit 33 through the manifold block 40.

[0032] When the machine tool is in working state, the residual pressure release valve 11 is opened, and the air flows to the main circuit 31, the delay circuit 32 and the slow start circuit 33 through the filter pressure reducing valve 12, wherein the first air control valve 34 is in the conducting state, so that the gas flows to each blowing branch 20; the second air control valve 35 in the delay circuit 32 is first in the conducting state, and the first gas tank 372 and the second gas tank 38 are inflated, and the fifth air control valve 373 is in the disconnected state; since the pipeline pressure connected to the pilot port of the fifth air control valve 373 is not enough to open the pilot port, the fifth air control valve 373 remains in the disconnected state; in the slow start circuit 33, the first solenoid valve 361 is in the conducting state, and since the output port of the first solenoid valve 361 is connected to the pilot port of the third air control valve 362, the third air control valve 362 is switched and in the conducting state, and as the output pressure P after the fourth air control valve 363 increases, the pressure P a Increase, when the output pressure Pa ≥Inlet pressure P of slow start valve group 36 c When the time is one-half of the time, the fourth air control valve 363 is turned on, so that the second air control valve 35 is in a closed state to cut off the delay circuit 32, maintain the turned-on state of the first air control valve 34, and realize the normal air supply of the blowing branch 20.

[0033] When the machine tool is powered off, the first solenoid valve 361 in the slow start circuit 33 is in the disconnected state, and the third air-controlled valve 362 is in the disconnected state, so that the second air-controlled valve 35 is in the on state, that is, the delay circuit 32 is turned on. After the second set time, the fifth air-controlled valve 373 is turned on, and the gas reaches the pilot port of the first air-controlled valve 34 through the output port of the fifth air-controlled valve 373, so that the first air-controlled valve 34 switches direction and is in the disconnected state, thereby realizing the delayed closing of the blowing branch 20 after the machine tool is powered off.

[0034] Specifically, in an optional implementation, the air blowing branch 20 includes a machine tool air blowing branch 21, a grating air blowing branch 22, a spindle air blowing branch 23 and a B-axis air seal air blowing branch 24 which are connected in parallel.

[0035] Among them, the machine tool air blowing branch 21, the grating air blowing branch 22, the spindle air blowing branch 23 and the B-axis air seal air blowing branch 24 are respectively provided with a pressure reducing valve 25, the grating air blowing branch 22, the spindle air blowing branch 23 and the B-axis air seal air blowing branch 24 are provided with an oil mist separator 26 and a micro mist separator 27, and the grating air blowing branch 22 is provided with a deodorizing filter 28.

[0036] Obviously, the above embodiments are merely examples for the purpose of clear explanation, and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived therefrom are still within the scope of protection of the present utility model.

Claims

1. A machine tool pneumatic control system, characterized in that: include: Air source assembly, air blowing branch and control valve group, the control valve group includes: A main circuit located between the air source assembly and the air blowing branch, wherein the main circuit is provided with a first air control valve to control the switch of the air blowing branch; A time delay circuit located between the air source assembly and the first air control valve, wherein the time delay circuit is provided with a second air control valve and a time delay valve group, and the output port of the time delay valve group is connected to the air control port of the first air control valve; A slow start circuit is located between the air source component and the second air control valve, wherein a slow start valve group is provided on the slow start circuit, and an output port of the slow start valve group is connected to the air control port of the second air control valve.

2. A machine tool pneumatic control system according to claim 1, characterized in that: The slow-start valve group includes a first solenoid valve, a third air-controlled valve, a fourth air-controlled valve and a first one-way throttle valve. The output end of the air source component is connected to the input ports of the first solenoid valve and the third air-controlled valve. The output port of the first solenoid valve is connected to the air-controlled port of the third air-controlled valve. The fourth air-controlled valve includes a first air-controlled port and a second air-controlled port. The output port of the third air-controlled valve is connected to the first air-controlled port of the fourth air-controlled valve. The output port of the third air-controlled valve is connected to the second air-controlled port of the fourth air-controlled valve through the first one-way throttle valve. The output port of the fourth air-controlled valve is connected to the air-controlled port of the second air-controlled valve.

3. A machine tool pneumatic control system according to claim 2, characterized in that: The delay valve group includes a second one-way throttle valve, a first gas tank and a fifth gas-controlled valve which are connected in sequence, the output port of the second gas-controlled valve is connected to the input port of the second one-way throttle valve, the output port of the second gas-controlled valve is also connected to the input port of the fifth gas-controlled valve, and the output port of the fifth gas-controlled valve is connected to the gas-controlled port of the first gas-controlled valve.

4. A machine tool pneumatic control system according to claim 3, characterized in that: The time delay circuit is further provided with a second gas tank, and the second gas tank is connected to the pipeline between the first gas tank and the fifth gas control valve.

5. A machine tool pneumatic control system according to claim 4, characterized in that: When the machine tool is in working state, the first air-controlled valve is in the on state; the second air-controlled valve is initially in the on state, the first gas tank and the second gas tank are inflated, and the fifth air-controlled valve is in the off state; the first solenoid valve is in the on state, the third air-controlled valve is in the on state, and the fourth air-controlled valve is turned on after the first set time, so that the second air-controlled valve is in the closed state, and the delay circuit is cut off.

6. A machine tool pneumatic control system according to claim 5, characterized in that: When the machine tool is powered off, the first solenoid valve is in an off state, the third air-controlled valve is in an off state, and the second air-controlled valve is in an on state. After a second set time, the fifth air-controlled valve is on and the first air-controlled valve is off.

7. A machine tool pneumatic control system according to claim 1, characterized in that: The air source component comprises a residual pressure release valve and a filter pressure reducing valve, and the air source component is connected with the main circuit, the delay circuit and the slow start circuit through a manifold block.

8. A machine tool pneumatic control system according to claim 1, characterized in that: The air blowing branch includes a machine tool air blowing branch, a grating air blowing branch, a spindle air blowing branch and a B-axis air seal air blowing branch which are connected in parallel.

9. A machine tool pneumatic control system according to claim 8, characterized in that: The machine tool air blowing branch, the grating air blowing branch, the spindle air blowing branch and the B-axis air seal air blowing branch are respectively provided with pressure reducing valves, the grating air blowing branch, the spindle air blowing branch and the B-axis air seal air blowing branch are provided with oil mist separators and micro mist separators, and the grating air blowing branch is provided with a deodorizing filter.

10. A machine tool pneumatic control system according to claim 1, characterized in that: The time-delay valve group is integrated into one body, and the time-delay valve group is provided with a control knob for setting the delay time; the slow-start valve group is integrated into one body.

Images