Dimple speed regulation device and method based on two-stage speed regulation valve

Abstract

The invention discloses a dimple speed regulation device and method based on a two-stage speed regulation valve. The dimple speed regulation device comprises an integrated set sensing switch, a wireless pilot controller, the two-stage speed regulation valve and an assembly of the two-stage speed regulation valve. According to actual working conditions on site, dimple speed adjustment of a semi-automatic drilling and dimple integrated tool or a manual dimple tool is achieved, and meanwhile dimple surface quality and hole making efficiency are guaranteed. During dimpling operation, the integrated set sensing switch of the device needs to be installed on a semi-automatic drilling and dimpling integrated tool or a manual dimpling tool, a high-speed mode is started during drilling, the device is switched to a low-speed mode according to the vibration condition of the tool during dimpling, and the dimpling rotating speed of the tool is limited; when a manual dimple tool is used for machining a composite material, the device starts the tool in a low-speed mode when a dimple drill does not make contact with a machining material, the device is switched to a high-speed mode according to the vibration condition of the tool after making contact with the material, the device is switched to the low-speed mode when a tool retracts to be separated from the material, and low-speed advancing and retreating and high-speed dimple are achieved.

Description

Technical Field

[0001] This application relates to the technical field of countersinking devices for aircraft assembly, and in particular to a countersinking speed control device and method based on a two-stage speed control valve. Background Technology

[0002] Hole making and countersinking are crucial processes in aircraft manufacturing and assembly, impacting aircraft safety and lifespan. In recent years, rapid advancements in aviation technology have placed higher demands on processing efficiency and quality. Currently, most pneumatic hole making and countersinking tools, both domestically and internationally, lack speed control. For semi-automatic drilling and countersinking tools, the countersinking tool diameter is larger than the hole making tool diameter. Selecting a safe and suitable countersinking linear speed limits the rotational speed during hole making, reducing efficiency. For manual machining of composite materials using ordinary pneumatic drills, low-speed advance / retreat and high-speed countersinking are required; otherwise, surface defects such as paint chipping and cracking can occur. Workers must manually control and maintain the displacement of the pneumatic drill switch to reduce tool speed, relying heavily on the operator's experience and skill. Prolonged operation is extremely laborious. Therefore, a simple, efficient, and controllable hole making and countersinking speed control device is urgently needed. Summary of the Invention The purpose of this invention is to provide a countersink speed control device and method based on a two-stage speed control valve that can intelligently adjust the gas flow rate according to the working conditions, in order to meet the actual production needs of aircraft assembly and processing. This countersink speed control device meets the requirements of simple control operation, safety and high efficiency while ensuring product quality.

[0003] The technical solution of this invention: In a first aspect, the present invention provides a countersinking speed control device based on a two-stage speed control valve, comprising: part 1, drill template 2, expansion chuck type automatic feed drill 3, integrated kit sensor switch 4, handheld pneumatic drill 5, air duct 6, two-stage speed control valve 7, air source 8, screw plug 9, lower valve sleeve 10, throttle valve core 11, upper valve sleeve 12, air inlet duct 13, main valve body 14, manual switch 15, wireless pilot controller 16, air filter 17, control air circuit 18, threaded pipe interface 19, air outlet duct 20, exhaust screen 21, return spring 23, condenser 25, vibration sensor 26, and switch controller 27; The front chuck of the expansion chuck-type automatic feed drill 3 is tightened and fixed with the drill template 2. The outlet end of the chuck contacts the surface of the part 1 to achieve initial positioning of the countersink. The handheld pneumatic drill 5 holds the countersink limiter and is close to the surface of the part 1 to achieve initial positioning of the countersink. The retractor 25 can store redundant elastic straps, making the elastic straps tight and playing a fixed support role, and fixing the integrated kit sensor switch 4 to the body of the pneumatic tool (3 or 5). The two-stage speed control valve 7 connects and fixes the main valve body 14 to the wireless pilot controller 16 with bolts, and connects to the air duct through the inlet and outlet threaded pipe interfaces 19 of the main valve body 14, and is connected in series in the air path from the air source 8 to the pneumatic tool (3 or 5).

[0004] Furthermore, the upper valve sleeve 12, throttle valve core 11, return spring 23, lower valve sleeve 10, and valve sleeve plug 9 constitute a throttle assembly. This assembly is installed entirely inside the main valve body 14. The valve sleeve plug 9 secures the throttle assembly to the inside of the main valve body 14 via threads, achieving isolation between the internal air passage and the external air. The top and side ends of the throttle valve core 11 have interconnected throttle passages. The throttle function is achieved through diameter variation. Throttle valve cores with different throttle orifice diameters can be selected and replaced according to the speed regulation requirements of actual operating conditions. The outer wall of the throttle valve core 11 mates with the inner walls of the upper and lower valve sleeves, providing a guiding function. The throttle valve core 11 can slide within the upper and lower limits of the valve sleeve. When the throttle valve core 11 moves to the upper limit, the sealing chamfer of the throttle valve core 11 fits against the chamfer of the upper valve sleeve 12, cutting off the main air passage. Air can only flow through the flow channel opened inside the throttle valve core 11. When the throttle valve core 11 is at the lower limit, the lower end of the throttle valve core is in close contact with the lower valve sleeve 10, and the main air passage is connected. The return spring 23 is installed between the lower end of the throttle valve core 11 and the lower valve sleeve 10 to ensure that the throttle valve core 11 is in a normally closed state when the switch is not activated.

[0005] Furthermore, the air chamber formed by the inner wall of the upper valve sleeve 12 and the upper end of the throttle valve core 11 is the upper control chamber 24, which is connected to the control air circuit through a radial hole and an annular air chamber; the air chamber formed by the inner wall of the lower valve sleeve 10 and the lower end of the throttle valve core 11 is the lower control chamber 22, which is connected to the control air circuit through a radial hole and an annular air chamber; the external vent of the control air circuit is connected to the outside air through the exhaust screen 21 installed on the main valve body.

[0006] Furthermore, the main valve body 14 is provided with a main air passage (inlet 13 and outlet 20) and multiple control air passages 18. The outlet of each air passage is sealed by a screw plug 9 to isolate the air passage from the outside air. The main air passage 14 is connected to the air duct 6. The air source enters from the inlet 13, and after the airflow is regulated by the throttle valve core 11, it connects to the outlet 20 to realize the flow regulation function. The inlet of the control air passage 18 is connected to the air inlet of the wireless pilot controller through the air filter 17. When the switch is switched to the low-speed throttle position, the outlet of the wireless pilot controller 16 can connect to the lower control chamber 22 of the throttle valve core 11, and cooperate with the return spring 23 to drive the throttle valve. When the throttle valve core 11 is activated, it closes tightly against the upper valve sleeve 12, allowing airflow to pass only through the throttle passage on the throttle valve core 11, thus achieving the throttle function. When the switch is switched to the high-speed ventilation position, the outlet of the wireless pilot controller 16 can be connected to the upper control chamber 24 of the throttle valve core 11, and the lower control chamber 22 circuit is connected to the exhaust screen 21 circuit. The residual gas in the lower control chamber 22 is discharged. Under the pressure of the upper control chamber 24 and the main flow gas, the throttle valve core 11 overcomes the elastic force of the return spring 23 and closes tightly against the lower valve sleeve 10. The main air intake passage 13 and the outlet passage 20 are directly connected, and the airflow passes directly through the valve body, achieving the flow function.

[0007] Furthermore, the condenser 25, vibration sensor 26, and switch controller 27 are connected in series via elastic straps to form an integrated sensor switch 4. The condenser 25 tucks in the long straps to ensure that the sensor switch 4 is reliably fixed to the tool body. The vibration sensor 26 transmits the vibration signal of the tool's hole-making and countersinking process to the wireless pilot controller 16. The switch controller 27 has a manual speed adjustment mode and an automatic speed adjustment mode. When switching to the manual speed adjustment mode, a low speed or a high speed can be manually selected. When switching to the automatic speed adjustment mode, a semi-automatic hole-making and countersinking gear or a manual countersinking gear can be selected.

[0008] Furthermore, the wireless pilot controller 16 changes the connection method of the control air circuit 18 and the air throttling state of the main air circuit of the main valve body 14, thereby adjusting the airflow and thus the speed of the tool.

[0009] Furthermore, in manual speed control mode, the switch controller 27 of the kit sensor switch 4 directly controls the wireless pilot controller to switch between low and high speed gears, thereby adjusting the tool speed.

[0010] Furthermore, in automatic speed control mode, the vibration sensor 26 of the set sensor switch 4 transmits the vibration signal to the wireless pilot controller 16 connected to the main valve. If the semi-automatic hole-making and countersinking mode is selected, during the hole-making process of the expansion chuck type automatic feed drill and countersinking integrated tool, the countersinking cutting edge does not contact the product part, and the vibration intensity does not exceed the safety threshold of hole-making vibration. The wireless pilot controller 16 controls the main valve to switch to the high-speed mode to ensure hole-making efficiency. After countersinking begins, the tool diameter, linear speed, and vibration intensity increase, and the vibration signal exceeds the safety threshold of hole-making vibration. The wireless pilot controller 16 controls the main valve to switch to the low-speed mode to reduce the rotation speed and ensure safe linear speed countersinking. If the manual countersinking mode is selected, when the countersinking drill held by the hand-held pneumatic drill is started, if the vibration signal fed back by the vibration sensor 26 does not reach the safe threshold for countersinking vibration, the wireless pilot controller 16 controls the main valve to switch to the low-speed mode for low-speed feed. After the countersinking drill cutting edge contacts the material, if the vibration signal fed back by the vibration sensor 26 reaches the safe threshold for countersinking vibration, the wireless pilot controller 16 controls the main valve to switch to the high-speed mode. When countersinking is completed, the countersinking drill is withdrawn from the material surface until the vibration signal fed back by the vibration sensor 26 is lower than the safe threshold for countersinking vibration. Then, the wireless pilot controller 16 controls the main valve to switch to the low-speed mode again for low-speed retraction. The intelligent adjustment of the countersinking speed is achieved based on the vibration signal, ensuring hole-making efficiency and part processing quality.

[0011] On the other hand, the present invention also provides an intelligent speed control method for countersinking based on a two-stage speed control valve, taking a semi-automatic hole-making countersinking tool as an example, which includes the following: Step 1, Semi-automatic hole making and countersinking tool: The front chuck of the expansion chuck type automatic feed drill equipped with the integrated drilling and countersinking tool is tightened and fixed with the drill template. The outlet end of the chuck contacts the surface of the test tool template to achieve the initial positioning of the countersinking surface. Manual countersinking tool: Use a hand-held pneumatic drill to hold the countersinking limiter with the countersinking drill bit attached, and press the protruding end of the countersinking limiter against the surface of the test template to achieve the initial positioning of the countersinking surface.

[0012] Step 2: Install the integrated kit sensor switch onto the body of the expansion chuck automatic feed drill or handheld pneumatic drill, and connect the two-stage speed control valve equipped with the wireless pilot controller in series in the air circuit of the pneumatic tool. Step 3: Activate the automatic speed control mode of the kit sensor switch, select the semi-automatic hole-making and countersinking setting (or manual countersinking setting) and the test cut setting, calibrate the hole-making vibration (or countersinking vibration) switching threshold, complete the hole-making and countersinking test cut on the test plate, update the hole-making vibration (or countersinking vibration) safety threshold for this material, and adjust the semi-automatic hole-making tool (or countersinking limiter) to the appropriate countersinking depth during the test cut.

[0013] Step 4: Depending on the tools used, before formally making holes and countersinks, turn off the test tool setting and only select the semi-automatic hole and countersink setting or the manual countersink setting. After fixing the tools, change the initial countersinking surface positioning to the surface of the workpiece.

[0014] Step 5, Semi-automatic hole making and countersinking tool: Turn on the expansion chuck type automatic feed drilling switch. The wireless pilot controller automatically adjusts the air supply mode of the two-stage speed control valve according to the processing status, thereby adjusting the tool speed to complete hole making and countersinking at a speed suitable for the working conditions.

[0015] Manual countersinking tool: After inserting the countersinking guide into the initial hole (before the cutting edge of the tool touches the workpiece), turn on the handheld pneumatic drill to the maximum stroke. The wireless pilot controller will automatically adjust the tool speed according to the processing status to achieve low-speed advance and retreat and high-speed countersinking.

[0016] The beneficial effects of this invention are as follows: The technical solution of this invention has the advantage of realizing intelligent speed regulation function during pneumatic tool countersinking, meeting the speed requirements of different processing conditions, improving processing efficiency, and ensuring simple, safe, and efficient processing. This invention has wide adaptability, is simple to install and operate, and can be installed on both manual countersinking tools and semi-automatic drilling and countersinking tools without changing the original air circuit. Compared with traditional on / off valves, the two-stage deceleration valve maintains constant air circuit connectivity in a throttling state, reducing the degree of sudden changes in gas flow during tool opening and closing, which helps to reduce vibration of air circuit components, reduce the impact on tool performance and lifespan, and extend the lifespan of air circuit components. During manual countersinking, there is no need to manually change the switching stroke, reducing the requirements for operator skill. Attached Figure Description

[0017] Figure 1 A schematic diagram of the installation of the countersink speed regulating device based on a two-stage speed regulating valve provided by the present invention in the air circuit. Figure 2 A three-dimensional structural schematic diagram of the two-stage speed control valve and its components provided by the present invention; Figure 3 This is a cross-sectional view of the main air circuit structure of the two-stage speed control valve provided by the present invention. Figure 4 A schematic diagram of the integrated kit sensor switch structure provided by the present invention; Figure 5 A schematic diagram of a countersink speed regulation method based on a two-stage speed regulating valve provided in an embodiment of the present invention; The numbers in the diagram are explained as follows: 1. Part; 2. Drill template; 3. Expansion chuck type automatic feed drill; 4. Integrated kit sensor switch; 5. Handheld pneumatic drill; 6. Air duct; 7. Two-stage speed control valve; 8. Air source; 9. Plug; 10. Lower valve sleeve; 11. Throttle valve core; 12. Upper valve sleeve; 13. Air inlet; 14. Main valve body; 15. Manual switch; 16. Wireless pilot controller; 17. Air filter; 18. Control air circuit; 19. Threaded pipe interface; 20. Air outlet; 21. Exhaust screen; 22. Lower control chamber; 23. Return spring; 24. Upper control chamber; 25. Choke; 26. Vibration sensor; 27. Switch controller. Detailed Implementation

[0018] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0019] This invention provides a countersink speed control device based on a two-stage speed control valve, comprising: an integrated sensor switch 4, a wireless pilot controller 16, a two-stage speed control valve 7, and its components. Figure 1 This is a schematic diagram of the installation of the device of the present invention in the air circuit. Depending on the actual processing conditions, the elastic strap can be tightened by the coiler 25 to reliably install the integrated kit sensor switch 4 onto the body of the semi-automatic countersinking tool 3 (manual countersinking 5). (See reference...) Figure 4 The integrated sensor switch 4 consists of a condenser 25, a vibration sensor 26, and a switch controller 27 connected in series via an elastic strap. The vibration sensor 26 transmits the vibration signal of the tool during the countersinking process to the wireless pilot controller 16. The wireless pilot controller 16 is fixed to the two-stage speed control valve 7 by fastening bolts, and the two control air circuits are connected. The wireless pilot controller 16 and the related components of the two-stage speed control valve 7 are installed in the tool's front air circuit through the air duct 6. The user can adjust the speed during the countersinking process by selecting different speed control modes.

[0020] Figure 2 This is a three-dimensional structural diagram of the two-stage speed control valve assembly provided by the present invention. Figure 3 This is a cross-sectional view of the main air circuit structure of the two-stage speed control valve provided by the present invention. The two-stage speed control valve assembly includes: a plug 9, a lower valve sleeve 10, a throttle valve core 11, an upper valve sleeve 12, an air inlet 13, a main valve body 14, a manual switch 15, a wireless pilot controller 16, an air filter 17, a control air circuit 18, a threaded pipe interface 19, an air outlet 20, an exhaust screen 21, a lower control chamber 22, a return spring 23, and an upper control chamber 24.

[0021] For details, please refer to Figure 3The main valve body 14 has a main air passage (inlet passage 13 and outlet passage 20). A throttling component is provided at the connection between the inlet and outlet passages, including: upper valve sleeve 12, throttling valve core 11, return spring 23, lower valve sleeve 10, and valve sleeve plug 9. The throttling valve core 11 has a connecting throttling passage at the top and side. The throttling function is achieved by changing the diameter. Throttling valve cores with different throttling orifice diameters can be selected and replaced according to the speed regulation requirements of the actual working conditions. A return spring 23 is installed in the lower inner groove of the throttle valve core 11. Both are installed inside the upper valve sleeve 12 and the lower valve sleeve 10. The upper and lower outer walls of the throttle valve core 11 mate with the inner walls of the upper and lower valve sleeves, respectively, providing a guiding function and allowing it to move up and down along the walls. When the throttle valve core 11 moves to its top and mates with the chamfer of the upper valve sleeve 12, it restricts the flow, cutting off the main air inlet and outlet passages, allowing air to flow only through the flow channel inside the throttle valve core 11. When the valve core 11 is at its lower limit, the lower end of the valve core is in close contact with the lower valve sleeve 10, and the main air passage is connected. The return spring 23 is installed between the lower end of the valve core 11 and the lower valve sleeve 10 to ensure that the valve core 11 is in a normally closed state when the switch is not activated. The air chamber formed by the inner wall of the upper valve sleeve 12 and the upper end of the throttle valve core 11 is the upper control chamber 24, which is connected to the control air circuit through a radial hole and an annular air chamber; the air chamber formed by the inner wall of the lower valve sleeve 10 and the lower end of the throttle valve core 11 is the lower control chamber 22, which is connected to the control air circuit through a radial hole and an annular air chamber; the external vent of the control air circuit is connected to the outside air through the exhaust screen 21 installed in the main valve body.

[0022] Specifically, a control air passage 18 is provided inside the main valve body 14, and a control air passage inlet is provided in the main air passage inlet 13. This inlet is connected to the air inlet of the wireless pilot controller 16 through the air filter 17. The wireless pilot controller 16 drives the throttle valve core 11 to move by changing the connection between its outlet and the upper and lower control chambers (24, 22), thereby enabling the main air passage to provide air to the subsequent tools in a flow-through or throttling manner, and realizing the speed regulation of the tools. When the switch is switched to the low-speed throttle position, the air outlet of the wireless pilot controller 16 can be connected to the lower control chamber 22 of the throttle valve core 11. Under the combined action of air pressure and the return spring 23, the throttle valve core 11 and the upper valve sleeve 12 are tightly closed, and the airflow can only pass through the throttle passage opened on the throttle valve core 11 to achieve the throttle function. When the switch is switched to the high-speed ventilation position, the air outlet of the wireless pilot controller 16 can be connected to the upper control chamber 24 of the throttle valve core 11. The circuit of the lower control chamber 22 is connected to the circuit of the exhaust screen 21. The residual gas in the lower control chamber 22 is discharged. Under the pressure of the upper control chamber 24 and the main flow gas, the throttle valve core 11 overcomes the elasticity of the return spring 23 and is tightly closed with the lower valve sleeve 10. The main air intake passage 13 and the exhaust passage 20 are directly connected, and the airflow passes directly through the valve body to achieve the flow function.

[0023] Figure 5This is a schematic diagram of a countersink speed control method based on a two-stage speed control valve provided in an embodiment of the present invention. Figure 1 The installation diagram shows that the front chuck of the expansion chuck type automatic feed drill 3 is tightened and fixed to the drill template 2, and the outlet end of the chuck contacts the surface of the part 1 to achieve the initial positioning of the countersink. The handheld pneumatic drill 5 holds the countersink limiter and is pressed against the surface of the part 1 to achieve the initial positioning of the countersink. The integrated kit sensor switch 4 is installed on the tool body (3 or 4), and the two-stage speed control valve assembly is connected in series to the front air circuit of the tool.

[0024] Specifically, the integrated sensor switch 4 is fixed to the back of the machine, and the user can select manual speed control mode and automatic speed control mode through the switch controller 27. When switching to manual speed control mode, the user can manually select a low speed or a high speed; when switching to automatic speed control mode, the user can select a semi-automatic hole-making and countersinking speed or a manual countersinking speed. In manual speed control mode, the switch controller 27 of the integrated sensor switch 4 selects a speed and then directly controls the wireless pilot controller 16 to switch between low and high speeds to achieve tool speed adjustment.

[0025] In automatic speed control mode, the vibration sensor 26 of the kit sensor switch 4 transmits the vibration signal to the wireless pilot controller 16 connected to the main valve. Whether it is the semi-automatic hole-making and countersinking mode or the manual countersinking mode, a test cut should be performed first. On the one hand, the limit of the hole-making and countersinking tool should be adjusted to a suitable countersinking depth. On the other hand, the test cut mode should be turned on to update the switching threshold of the wireless pilot controller 16 by testing the hole-making and countersinking on the template. After the test cut is completed, the test cut mode should be turned off and the hole-making and countersinking should be carried out in a formal manner.

[0026] If the semi-automatic hole-making and countersinking mode is selected, during the hole-making process of the expansion chuck type automatic feed drill and countersinking integrated tool, the countersinking cutting edge does not contact the product part, and the vibration intensity does not exceed the safety threshold of hole-making vibration. The wireless pilot controller 16 controls the main valve to switch to the high-speed mode to ensure hole-making efficiency. After the countersinking starts, the tool diameter, linear speed, and vibration intensity increase, and the vibration signal exceeds the safety threshold of hole-making vibration. The wireless pilot controller 16 controls the main valve to switch to the low-speed mode to reduce the rotation speed and ensure safe linear speed countersinking. If the manual countersinking mode is selected, when the countersinking drill held by the hand-held pneumatic drill is started, if the vibration signal fed back by the vibration sensor 26 does not reach the safe threshold for countersinking vibration, the wireless pilot controller 16 controls the main valve to switch to the low-speed mode for low-speed feed. After the countersinking drill cutting edge contacts the material, if the vibration signal fed back by the vibration sensor 26 reaches the safe threshold for countersinking vibration, the wireless pilot controller 16 controls the main valve to switch to the high-speed mode. When countersinking is completed, the countersinking drill is withdrawn from the material surface until the vibration signal fed back by the vibration sensor 26 is lower than the safe threshold for countersinking vibration. Then, the wireless pilot controller 16 controls the main valve to switch to the low-speed mode again for low-speed retraction. The intelligent adjustment of the countersinking speed is achieved based on the vibration signal, ensuring hole-making efficiency and part processing quality.

[0027] Based on the countersinking speed control device provided in the above embodiments of the present invention, the present invention also provides a countersinking speed control machining method based on a two-stage speed control valve, comprising the following steps: Step 1, Semi-automatic hole making and countersinking tool: The front chuck of the expansion chuck type automatic feed drill equipped with the integrated drill and countersinking tool is tightened and fixed with the drill template. The outlet end of the chuck contacts the surface of the test template to achieve initial countersinking surface positioning; Manual countersinking tool: The countersinking limiter equipped with the countersinking drill tool is clamped with a hand-held pneumatic drill. The protruding end of the countersinking limiter is pressed against the surface of the test template to achieve initial countersinking surface positioning.

[0028] Step 2: Install the integrated kit sensor switch onto the body of the expansion chuck automatic feed drill or handheld pneumatic drill, and connect the two-stage speed control valve equipped with the wireless pilot controller in series in the air circuit of the pneumatic tool. Step 3: Activate the automatic speed control mode of the kit sensor switch, select the semi-automatic hole-making and countersinking setting (or manual countersinking setting) and the test cut setting, calibrate the hole-making vibration (or countersinking vibration) switching threshold, complete the hole-making and countersinking test cut on the test plate, update the hole-making vibration (or countersinking vibration) switching threshold for this material, and adjust the semi-automatic hole-making tool (or countersinking limiter) to the appropriate countersinking depth during the test cut.

[0029] Step 4: Depending on the tools used, before formally making holes and countersinks, turn off the test tool setting and only select the semi-automatic hole and countersink setting or the manual countersink setting. After fixing the tools, change the initial countersinking surface positioning to the surface of the workpiece.

[0030] Step 5, Semi-automatic hole making and countersinking tool: Turn on the expansion chuck-type automatic feed drilling switch. The wireless pilot controller automatically adjusts the air supply mode of the two-stage speed control valve according to the processing status, thereby adjusting the tool speed to complete hole making and countersinking at a speed suitable for the working conditions. Manual countersinking tool: After inserting the pre-drill guide into the initial hole (with the cutting edge not in contact with the workpiece), turn on the handheld pneumatic drill switch to the maximum stroke. The wireless pilot controller automatically adjusts the tool speed according to the processing status, achieving low-speed advance and retreat, and high-speed countersinking.

Claims

1. A two-stage speed control valve based dimple speed control device, characterized by, It comprises: Parts (1), drill jig plate (2), expansion chuck automatic feed drill (3), integrated sensor switch (4), handheld air drill (5), air pipe (6), two-stage speed regulating valve (7), air source (8); The two-stage speed regulating valve (7) is composed of a main valve body (14) and a wireless pilot controller (16); The integrated sensor switch (4) contains a concentrator (25); The front end of the expansion chuck automatic feed drill (3) is fixed by expanding and fitting with the drill jig plate (2), and the outlet end of the chuck is in contact with the surface of the part (1) to realize the positioning of the dimple initial surface; The handheld air drill (5) clamps the dimple positioner, which is tightly attached to the surface of the part (1) to realize the positioning of the dimple initial surface; The concentrator (25) accommodates the redundant elastic bandage, so that the elastic bandage is tight and has a fixing and supporting effect, and the integrated sensor switch (4) is fixed on the pneumatic tool; The two-stage speed regulating valve (7) is connected and fixed by bolts between the main valve body (14) and the wireless pilot controller (16), and is connected with the air pipe (6) through the inlet and outlet threaded pipe interfaces of the main valve body (14), and is connected in series in the air path from the air source (8) to the pneumatic tool.

2. The two-stage speed control valve based dimple speed control device of claim 1, wherein, The device further comprises: The air throttle assembly composed of an upper valve sleeve (12), an air throttle valve core (11), a reset spring (23), a lower valve sleeve (10) and a valve sleeve screw (9) is integrally installed in the main valve body (14), and the valve sleeve screw (9) is fixedly installed in the main valve body (14) by threads to realize the isolation of the internal air path and the external air; The air throttle valve core (11) is provided with an air flow channel communicated at the top and side ends, and realizes the air throttle function by changing the diameter; The outer wall of the air throttle valve core (11) cooperates with the inner walls of the upper valve sleeve (12) and the lower valve sleeve (10) to have a guiding effect; The air throttle valve core (11) slides within the upper and lower limits of the valve sleeve; When the air throttle valve core (11) is actuated to the upper limit at the top, the sealing chamfer of the air throttle valve core (11) is in contact with the chamfer of the upper valve sleeve (12), the main air path is cut off, and only the flow channel inside the air throttle valve core (11) can throttle the air; When the air throttle valve core (11) is in the lower limit, the lower end of the air throttle valve core is in close contact with the lower valve sleeve (10), and the main air path is communicated; The reset spring (23) is installed between the lower end of the air throttle valve core (11) and the lower valve sleeve (10) to ensure that the air throttle valve core (11) is in a normally closed state when the switch is not actuated.

3. The dimple speed regulating device based on the two-stage speed regulating valve according to claim 2, wherein The air cavity formed between the inner wall of the upper valve sleeve (12) and the upper end of the air throttle valve core (11) is an upper control cavity (24), which is communicated with the control air path through a radial hole and an annular air cavity; The air cavity formed between the inner wall of the lower valve sleeve (10) and the lower end of the air throttle valve core (11) is a lower control cavity (22), which is communicated with the control air path through a radial hole and an annular air cavity; The outer vent of the control air path is communicated with the external air through the air exhaust screen (21) installed on the main valve body.

4. The dimple speed regulating device based on the two-stage speed regulating valve according to claim 3, wherein The main valve body (14) is provided with a main gas path composed of an air inlet channel (13) and an air outlet channel (20), and a plurality of control gas paths (18). The gas path is sealed by a screw plug (9) to isolate the gas path from the air outside the valve. The main gas path (14) is connected to the air pipe (6). The air source enters the air inlet channel (13), passes through the air throttle valve core (11) for air flow regulation, and is connected to the air outlet channel (20) to realize the flow regulation function. The air inlet channel of the control gas path (18) is connected to the air inlet of the wireless pilot controller through the air filter (17).

5. The dimming device based on the two-stage speed regulating valve according to claim 4, characterized in that, When the switch is switched to the air throttle low-speed gear, the air outlet channel of the wireless pilot controller (16) is connected to the lower control chamber (22) of the air throttle valve core (11), and cooperates with the return spring (23) to drive the air throttle valve core (11) to move. The air throttle valve core (11) is tightly closed with the upper valve sleeve (12), and the airflow can only pass through the air throttle channel opened on the air throttle valve core (11), realizing the throttling function. When the switch is switched to the air throttle high-speed gear, the air outlet channel of the wireless pilot controller (16) is connected to the upper control chamber (24) of the air throttle valve core (11), the lower control chamber (22) loop is connected to the air exhaust screen (21) loop, the residual gas in the lower control chamber (22) is discharged, and the air throttle valve core (11) is tightly closed with the lower valve sleeve (10) under the pressure of the upper control chamber (24) and the main flow channel gas, the main gas path air inlet channel (13) and the air outlet channel (20) are directly connected, the airflow directly passes through the valve body, realizing the flow function.

6. The dimming device based on the two-stage speed regulating valve according to claim 1, characterized in that, The concentrator (25), the vibration sensor (26) and the switch controller (27) are connected in series through the elastic band to form an integrated sensing switch (4). The concentrator (25) collects the long band to ensure that the sensing switch (4) is reliably fixed to the tool body. The vibration sensor (26) transmits the vibration signal of the tool hole dimming process to the wireless pilot controller (16). The switch controller (27) has a manual speed regulation mode and an automatic speed regulation mode. When switched to the manual speed regulation mode, the low-speed gear or the high-speed gear is manually selected. When switched to the automatic speed regulation mode, the semi-automatic hole dimming gear or the manual dimming gear is selected.

7. The two-stage speed control valve based dimple speed control device of claim 5, wherein, The wireless pilot controller (16) changes the connection mode of the control gas path (18) and the air throttle state of the main gas path of the main valve body (14) to realize the regulation of the air flow and the speed regulation of the pneumatic tool.

8. A method for speed regulation based on two-stage speed regulating valve, characterized in that, The method is implemented based on the device of any one of claims 1-7, and the method comprises: Step 1, semi-automatic hole dimming tool: the front-end chuck part of the expansion chuck type automatic feeding drill equipped with a drill-dimmer integrated cutter is tightly matched with the drill template to complete the fixation, the chuck outlet end contacts the surface of the test cutter template to realize the positioning of the dimming initial surface. Manual tapper tool: the tapper limiter with tapper drill bit is clamped by hand-held air drill, the tapper limiter is tightly attached to the surface of the test board to realize the initial surface positioning of tapper; Step 2: install the integrated sensing switch to the expansion chuck automatic feed drill or hand-held air drill, and connect the two-stage speed regulating valve with wireless pilot controller to the air tool pre-gas circuit; Step 3: open the automatic speed regulating mode of the integrated sensing switch, select the tapper gear and test bit gear, complete the test bit of the hole making tapper on the test board, update the safety threshold of the hole making vibration or tapper vibration of the material, and adjust the semi-automatic hole making tool or tapper limiter to the appropriate tapper depth during the test bit process; Step 4: according to the tool used, close the test bit gear before making the tapper, and only select the semi-automatic hole making tapper gear or manual tapper gear, fix the tool, and change the tapper initial surface positioning to the surface of the processed part; Step 5: semi-automatic hole making tapper tool: open the expansion chuck automatic feed drill hole making switch, and the wireless pilot controller automatically adjusts the air supply mode of the two-stage speed regulating valve according to the processing state, so as to adjust the tool speed to complete the hole making and tapper according to the speed of the working condition; Manual tapper tool: the tapper drill is inserted into the initial hole, the tool blade is not in contact with the part, the hand-held air drill switch is opened to the maximum stroke, and the wireless pilot controller automatically adjusts the tool speed according to the processing state to realize low-speed feeding and high-speed tapper.

9. The method of claim 8, wherein the method further comprises: In step 5: In the automatic speed regulating mode, the vibration sensor (26) of the integrated sensing switch (4) transmits the vibration signal to the wireless pilot controller (16) connected with the main valve, if the semi-automatic hole making tapper gear is selected, during the hole making process of the expansion chuck automatic feed drill tapper integrated tool, the tapper cutting edge does not contact the product part, the vibration intensity does not exceed the safety threshold of the hole making vibration, the wireless pilot controller (16) controls the main valve to be cut to the high-speed gear; after starting tapper, the tool diameter, linear speed and vibration intensity increase, the vibration signal exceeds the safety threshold of the hole making vibration, the wireless pilot controller (16) controls the main valve to be cut to the low-speed gear to reduce the speed to ensure the safety line speed tapper; If the manual tapper gear is selected, when the tapper drill clamped by the hand-held air drill is started, the vibration signal fed back by the vibration sensor (26) does not reach the safety threshold of the tapper vibration, the wireless pilot controller (16) controls the main valve to be cut to the low-speed gear, and the low-speed feeding is realized; after the tapper drill cutting edge contacts the material, the vibration signal fed back by the vibration sensor (26) reaches the safety threshold of the tapper vibration, the wireless pilot controller (16) controls the main valve to be cut to the high-speed gear, when the tapper is completed, the tapper drill is separated from the material surface, until the vibration signal fed back by the vibration sensor (26) is lower than the safety threshold of the tapper vibration, the wireless pilot controller (16) controls the main valve to be cut to the low-speed gear again, and the low-speed retraction is realized, the intelligent adjustment of the tapper process speed is realized according to the vibration signal.

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