A valve piece tongue spring micro-bending machine and a valve piece tongue spring micro-bending processing method

Abstract

The application discloses a valve piece tongue spring micro-bending machine, which comprises a rack and a controller, the rack is rotationally connected with a transfer disc and a bending mechanism, a plurality of fixing mechanisms for fixing valve pieces are arranged on the transfer disc, the bending mechanism is located on one side of the transfer disc and corresponds to one fixing mechanism, the bending mechanism comprises a liftable driving column, a cavity is arranged in the driving column, a pressing block is arranged in the cavity, a pressing rod is arranged on the pressing block, the pressing rod extends out of the cavity, a pressing plate is arranged on the end of the pressing rod extending out of the cavity, the pressing block is slidably connected with the cavity, a spring is arranged between the bottom surface of the pressing block and the bottom surface of the cavity, a pressure sensor is connected to the bottom end of the spring, an optical grating ruler is arranged between the side surface of the pressing block and the cavity, and a telescopic top rod is connected to the top of the pressing block, so that the tongue spring bending efficiency is improved.

Description

A valve plate and spring micro-bending machine and a valve plate and spring micro-bending processing method Technical Field

[0001] This invention belongs to the field of valve plate processing technology, and more specifically relates to a valve plate tongue spring micro-bending machine and a valve plate tongue spring micro-bending processing method. Background Technology

[0002] The valve plate inside the compressor is equipped with a tongue spring for sealing. The opening and closing of the flow channel is achieved by the elasticity of the tongue spring. In order to improve the sealing performance, the tongue spring is slightly bent during the production of the valve plate. Since the precision of the micro-bending is high, an automatic micro-bending machine is generally used to bend the tongue spring, which is more efficient.

[0003] For example, Chinese patent CN109261767A discloses a micro bending device for valve plate tongue springs. It uses hydraulic pressure to push a force-bearing plate into contact with the surface of the fixed valve plate tongue spring. A support is set below the valve plate tongue spring, and the surface of the support is set with a certain slope. This slope is the bending angle of the tongue spring. The force-bearing plate presses down on the tongue spring, so that the tongue spring contacts the support surface, thereby realizing the bending of the tongue spring. The slope set on the surface of the force-bearing support can ensure that the bending of the tongue spring on each valve plate is consistent and the bending efficiency is high.

[0004] The above-mentioned equipment has at least the following disadvantages: 1. Since the tongue spring itself has a certain elasticity, after the tongue spring is pressed down onto the support surface by the pressure plate, the tongue spring will inevitably rebound at a certain angle. This rebound causes the bending angle of the tongue spring to be unqualified, resulting in a low production qualification rate of parts; 2. To address problem 1, the same tongue spring can be bent repeatedly by the pressure plate to gradually reduce the amount of spring rebound and achieve qualification. However, this method significantly affects production efficiency; 3. The existing equipment does not have a detection function. The actual bending parameters of the tongue spring cannot be determined solely by the known slope of the support surface. Post-production testing is still required, which reduces production efficiency; 4. During production, valve plates can only be installed, fixed, and disassembled one by one on the fixed groove, which affects production efficiency. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this invention provides a valve plate tongue spring micro-bending machine and a valve plate tongue spring micro-bending processing method, thereby improving the bending efficiency of valve plate tongue springs.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a valve plate tongue spring micro-bending machine, comprising a frame and a controller, wherein a transfer plate and a bending mechanism are rotatably connected to the frame, the transfer plate is provided with a plurality of fixing mechanisms for fixing valve plates, the bending mechanism is located on one side of the transfer plate and corresponding to one of the fixing mechanisms, the bending mechanism includes a liftable drive column, a cavity is provided in the drive column, a pressure block is provided in the cavity, a pressure rod is provided on the pressure block, the pressure rod extends out of the cavity, a pressure plate is provided on the end of the pressure rod extending out of the cavity, the pressure block is slidably connected to the cavity, a spring is provided between the bottom surface of the pressure block and the bottom surface of the cavity, a pressure sensor is connected to the bottom end of the spring, a grating ruler is provided between the side of the pressure block and the cavity, and a retractable top rod is connected to the top of the pressure block.

[0007] Furthermore, a support mechanism is provided below the pressure plate. The support mechanism includes a support column connecting to the frame, a support plate on the top of the support column, and the bottom surface of the end of the support plate near the transfer tray is hinged to the support column. An electric telescopic rod is provided on the support column, the main body of the electric telescopic rod is hinged to the support column, the telescopic rod of the electric telescopic rod is hinged to the bottom surface of the support plate, and a proximity sensor is provided on the support plate.

[0008] Furthermore, a clearance groove is provided on the top surface of the hinged end of the support plate and the support column.

[0009] Furthermore, the fixing mechanism includes a mounting groove located on the side of the transfer tray, and a pressure plate is provided on the upper surface of the mounting groove, with a driving device connected to the pressure plate.

[0010] Furthermore, the pressure plate is hinged to the pressure rod.

[0011] Furthermore, an angular displacement encoder is provided on the rotating shaft where the support plate is hinged to the support column.

[0012] A method for micro-bending valve plate springs, using the aforementioned valve plate spring micro-bending machine, is described below.

[0013] 1. Manually or automatically by a robotic arm, one end of the valve plate is inserted into the mounting groove of the transfer plate, and the clamping plate presses the end of the valve plate tightly.

[0014] 2. Rotate the transfer plate to position the valve plate between the pressure plate and the support plate, with the tongue spring on the valve plate positioned directly below the pressure plate and directly above the support plate;

[0015] 3. The electric telescopic rod drives the support plate to rotate and tilt to a certain bending angle, which is the qualified bending angle of the tongue spring;

[0016] 4. The spring lifts the pressure block, and the weight of the pressure block, pressure rod and pressure plate as a whole is balanced by the supporting force of the spring. At this time, the force detected by the pressure sensor is initialized or zeroed, and the displacement of the pressure block detected by the grating ruler is initialized or zeroed.

[0017] 5. Move the push rod down until it contacts the pressure block. It is required that the force balance between the pressure block and the spring be maintained at the same time as the contact. That is, the pressure detected by the pressure sensor is still the initial value or zero, and the displacement of the pressure block detected by the grating ruler is still the initial value or zero.

[0018] 6. After the drive column moves down and the pressure plate contacts the surface of the tongue spring, the tongue spring is bent until the bottom surface of the tongue spring contacts the support plate. Since the push rod holds the pressure block in place, the readings of the pressure sensor and the grating ruler are still the initial values, zero or fluctuate slightly (due to system error).

[0019] 7. After the bottom surface of the reed is in full contact with the support plate, maintain this contact for a period of time;

[0020] 8. The push rod retracts, the tongue spring rebounds upward, causing the pressure block to move upward, changing the force on the spring, the pressure sensor detects the force value, and the grating ruler detects the distance the pressure block moves;

[0021] 9. After receiving the force value and the distance the block moves, the controller calculates the rebound amount through the program;

[0022] 10. The drive column moves upward, and the pressure sensor and grating ruler are reset or zeroed.

[0023] 11. The electric telescopic rod drives the support plate to rotate until the support plate contacts the tongue spring again. The tilt angle of the support plate is detected by the proximity sensor and recorded by the angular displacement encoder, which is the actual bending angle of the tongue spring.

[0024] 12. Steps 5-11 can be repeated multiple times to record multiple sets of springback data and the actual bending angle of the tongue spring, and then calculate the tilt angle of the support plate that can be bent in one go.

[0025] 13. Control the electric telescopic rod to drive the support plate to rotate and tilt to the calculated angle;

[0026] 14. The push rod re-engages with the pressure block, and the transfer plate rotates the next valve plate between the pressure plate and the support plate. The drive column moves down to begin the bending operation. Except for the first valve plate, the bending of each subsequent valve plate tongue spring is done in one go. That is, after the downward pressing tongue spring contacts the support plate, the support column can move up directly back. The tongue spring rebounds, causing its bending angle to fall within the qualified range.

[0027] Furthermore, after each bending, the bending data of the tongue spring can be detected by rotating the support plate, and the data is recorded by the controller.

[0028] Compared with the prior art, the beneficial effects of the present invention are as follows: the valve plate is installed on the transfer plate and fixed by the fixing mechanism. The rotation of the transfer plate rotates the valve plate between the bending mechanism and the support mechanism. The drive column on the bending mechanism drives the pressure plate to press down, and the support plate on the support mechanism tilts. The pressure plate bends the valve plate spring and makes it contact the tilted support plate. The spring rebound amount is calculated by the sensors and controllers built into the bending mechanism, and the tilt of the support plate is adjusted. This allows the spring to be bent in one operation, which greatly improves production efficiency. After each bending, the degree of bending of the spring can be detected by the support plate, eliminating the need for subsequent detection. Attached Figure Description

[0029] Figure 1 is a schematic diagram of the valve plate tongue spring micro bending machine of the present invention;

[0030] Figure 2 is a schematic diagram of the bending mechanism in the valve plate tongue spring micro bending machine of the present invention;

[0031] Figure 3 is a schematic diagram of the fixing mechanism and the supporting mechanism in the valve plate tongue spring micro bending machine of the present invention;

[0032] Figure 4 is a top view of the transfer disc in the valve plate tongue spring micro bending machine of the present invention.

[0033] Reference numerals in the attached drawings: 1. Transfer tray; 2. Bending mechanism; 3. Drive column; 4. Pressure block; 5. Pressure rod; 6. Pressure plate; 7. Spring; 8. Pressure sensor; 9. Grating ruler; 10. Support column; 11. Support plate; 12. Electric telescopic rod; 13. Clearance groove; 14. Mounting groove; 15. Pressing plate; 16. Top rod; 17. Valve plate. Detailed Implementation

[0034] In the description of this invention, it should be noted that the directional terms such as "center", "horizontal (X)", "longitudinal (Y)", "vertical (Z)", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", and "counterclockwise" indicate the orientation and positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. They should not be construed as limiting the specific protection scope of this invention.

[0035] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features. Thus, the use of "first" and "second" to define a feature may explicitly or implicitly include one or more of that feature. In the description of this invention, "several" or "a number" means two or more, unless otherwise explicitly specified.

[0036] The present invention will be further described with reference to Figures 1 to 4.

[0037] A valve plate tongue spring micro-bending machine includes a frame and a controller. A transfer plate 1 and a bending mechanism 2 are rotatably connected to the frame. The transfer plate 1 is provided with several fixing mechanisms for fixing valve plates 17. The bending mechanism 2 is located on one side of the transfer plate 1 and is provided with one fixing mechanism. The bending mechanism 2 includes a liftable drive column 3. A cavity is provided inside the drive column 3. A pressure block 4 is provided inside the cavity. A pressure rod 5 is provided on the pressure block 4. The pressure rod 5 extends out of the cavity. A pressure plate 6 is provided on the end of the pressure rod 5 that extends out of the cavity. The pressure block 4 is slidably connected to the cavity. A spring 7 is provided between the bottom surface of the pressure block 4 and the bottom surface of the cavity. A pressure sensor 8 is connected to the bottom end of the spring 7. A grating ruler 9 is provided between the side of the pressure block 4 and the cavity. A telescopic top rod 16 is connected to the top of the pressure block 4.

[0038] As shown in Figure 2, in this preferred embodiment, the push rod 16 can be connected to a driving device such as a cylinder or hydraulic cylinder to drive the push rod 16 to extend or retract.

[0039] As shown in Figure 3, in this preferred embodiment, a support mechanism is provided below the pressure plate 6. The support mechanism includes a support column 10 connecting the frame, a support plate 11 on the top of the support column 10, and the bottom surface of the end of the support plate 11 near the transfer tray 1 is hinged to the support column 10. An electric telescopic rod 12 is provided on the support column 10, the main body of the electric telescopic rod 12 is hinged to the support column 10, and the telescopic rod of the electric telescopic rod 12 is hinged to the bottom surface of the support plate 11. A proximity sensor is provided on the support plate 11.

[0040] As shown in Figure 1, in this preferred embodiment, the top surface of the hinged end of the support plate 11 and the support column 10 is provided with a clearance groove 13 to prevent the end of the support plate 11 from affecting the valve plate 17 when it rotates.

[0041] As shown in Figure 3, in this preferred embodiment, the fixing mechanism includes a mounting groove 14 located on the side of the transfer plate 1, and a pressing plate 15 is provided on the upper top surface of the mounting groove 14. A driving device is connected to the pressing plate 15.

[0042] As shown in Figure 2, in this embodiment, preferably, the driving device connected to the pressing plate 15 can be a cylinder or the like.

[0043] As shown in Figure 4, four circumferentially arranged fixing mechanisms can be set on the transfer plate 1. The bending mechanism 2 and the support mechanism correspond to one of the fixing mechanisms. When the bending mechanism 2 bends the valve plate 17 on one of the fixing mechanisms, the valve plate 17 can be placed and removed on the other fixing mechanisms, which greatly improves efficiency.

[0044] As shown in Figure 2, in this preferred embodiment, the pressure plate 6 is hinged to the pressure rod 5.

[0045] In this preferred embodiment, an angular displacement encoder is provided on the rotating shaft where the support plate 11 is hinged to the support column 10, for detecting the tilt angle of the support plate 11.

[0046] A method for micro-bending the valve plate 17 tongue spring, using the aforementioned valve plate 17 tongue spring micro-bending machine, is as follows.

[0047] 1. Manually or automatically by a robotic arm, one end of the valve plate 17 is inserted into the mounting groove 14 of the transfer plate 1, and the clamping plate 15 clamps the end of the valve plate 17.

[0048] 2. Rotate the transfer plate 1 so that the valve plate 17 rotates between the pressure plate 6 and the support plate 11, with the tongue spring on the valve plate 17 located directly below the pressure plate 6 and directly above the support plate 11;

[0049] 3. The electric telescopic rod 12 drives the support plate 11 to rotate and tilt to a certain bending angle, which is the qualified bending angle of the tongue spring;

[0050] 4. Spring 7 lifts up pressure block 4. The weight of pressure block 4, pressure rod 5 and pressure plate 6 as a whole is balanced with the supporting force of spring 7. At this time, the force detected by pressure sensor 8 is initialized or zeroed, and the displacement of pressure block 4 detected by grating ruler 9 is initialized or zeroed.

[0051] 5. The push rod 16 moves down until it contacts the pressure block 4. It is required that the force balance between the pressure block 4 and the spring 7 be maintained at the same time as the contact, that is, the pressure detected by the pressure sensor 8 is still the initial value or zero, and the displacement of the pressure block 4 detected by the grating ruler 9 is still the initial value or zero.

[0052] 6. After the drive column 3 moves down and the pressure plate 6 contacts the surface of the tongue spring, it begins to bend the tongue spring until the bottom surface of the tongue spring contacts the support plate 11. Since the push rod 16 holds the pressure block 4, the readings of the pressure sensor 8 and the grating ruler 9 are still the initial values ​​or zero or fluctuate slightly (for system error).

[0053] 7. After the bottom surface of the reed is in full contact with the support plate 11, maintain this contact for a period of time;

[0054] 8. The push rod 16 retracts, the tongue spring rebounds upward, causing the pressure block 4 to move upward, changing the force on the spring 7. The pressure sensor 8 detects the force value, and the grating ruler 9 detects the movement distance of the pressure block 4.

[0055] 9. After the controller receives the force value and the moving distance of the pressure block 4, it calculates the rebound amount through the program;

[0056] 10. The drive column 3 moves upward, and the pressure sensor 8 and the grating ruler 9 are reset or zeroed;

[0057] 11. The electric telescopic rod 12 drives the support plate 11 to rotate until the support plate 11 contacts the tongue spring again. The tilt angle of the support plate 11 is detected by the proximity sensor and recorded by the angular displacement encoder, which is the actual bending angle of the tongue spring.

[0058] 12. Steps 5-11 can be repeated multiple times to record multiple sets of springback data and the actual bending angle of the tongue spring, and then calculate the tilt angle of the support plate 11 that can be bent in one go.

[0059] 13. Control the electric telescopic rod 12 to drive the support plate 11 to rotate and tilt to the calculated angle;

[0060] 14. The top rod 16 re-contacts the pressure block 4, and the transfer plate 1 rotates the next valve plate 17 between the pressure plate 6 and the support plate 11. The drive column 3 moves down to start the bending operation. Except for the first valve plate 17, the bending of each subsequent valve plate 17 is done in one go. That is, after the downward pressing of the tongue spring contacts the support plate 11, the support column 10 can move up directly back. The tongue spring rebounds and makes its bending angle fall within the qualified range.

[0061] In addition to the initial bending, subsequent bending of the same valve plate 17 tongue spring can be performed in one go, greatly improving bending efficiency.

[0062] In this preferred embodiment, after each valve plate 17 tongue spring is bent once, the bending data of the tongue spring can be detected by rotating the support plate 11 and recorded by the controller, without the need for subsequent detection.

[0063] The above description is merely a preferred embodiment of the present invention. The scope of protection of the present invention is not limited to the above embodiments. All technical solutions falling within the scope of the present invention's concept are within the scope of protection of the present invention. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principles of the present invention should also be considered within the scope of protection of the present invention.

Claims

1. A valve plate and tongue spring micro-bending machine, characterized in that: The device includes a frame and a controller. A transfer plate and a bending mechanism are rotatably connected to the frame. The transfer plate has several fixing mechanisms for fixing valve plates. The bending mechanism is located on one side of the transfer plate and corresponds to one of the fixing mechanisms. The bending mechanism includes a liftable drive column with a cavity inside. A pressure block is placed inside the cavity, and a pressure rod is attached to the pressure block. The pressure rod extends out of the cavity, and a pressure plate is attached to the end of the pressure rod extending out of the cavity. The pressure block is slidably connected to the cavity, and a spring is installed between the bottom surface of the pressure block and the bottom surface of the cavity. A pressure sensor is connected to the bottom end of the spring. A grating ruler is installed between the side of the pressure block and the cavity. A retractable top rod is connected to the top of the pressure block. A support mechanism is installed below the pressure plate. The support mechanism includes a support column connecting to the frame. A support plate is installed on the top of the support column. The bottom surface of the support plate near the transfer tray is hinged to the support column. An electric telescopic rod is installed on the support column. The main body of the electric telescopic rod is hinged to the support column. The telescopic rod is hinged to the bottom surface of the support plate. A proximity sensor is installed on the support plate.

2. The valve plate and tongue spring micro-bending machine according to claim 1, characterized in that: A clearance groove is provided on the top surface of the hinged end of the support plate and the support column.

3. The valve plate and tongue spring micro-bending machine according to claim 2, characterized in that: The fixing mechanism includes a mounting groove located on the side of the transfer tray, and a pressure plate is provided on the upper surface of the mounting groove. A driving device is connected to the pressure plate.

4. The valve plate and tongue spring micro-bending machine according to claim 3, characterized in that: The pressure plate is hinged to the pressure rod.

5. The valve plate and tongue spring micro-bending machine according to claim 4, characterized in that: An angular displacement encoder is installed on the rotating shaft that is hinged to the support plate and the support column.

6. A method for micro-bending valve plate springs, using the valve plate spring micro-bending machine described in any one of claims 1-5, characterized in that: The processing method is as follows: (1) Manually or automatically insert one end of the valve plate into the mounting groove of the transfer plate, and press the end of the valve plate with the clamping plate; (2) Rotate the transfer plate so that the valve plate rotates between the pressure plate and the support plate, and the tongue spring on the valve plate is located directly below the pressure plate and directly above the support plate; (3) The electric telescopic rod drives the support plate to rotate and tilt to a certain bending angle, which is the qualified bending angle of the tongue spring; (4) The spring lifts the pressure block, and the weight of the pressure block, pressure rod and pressure plate as a whole is balanced with the supporting force of the spring. At this time, the force detected by the pressure sensor is initialized or returned to the initialization. (5) The push rod moves down until it contacts the pressure block. It is required that the force balance between the pressure block and the spring be maintained at the same time as the contact. That is, the pressure sensor detects the pressure at the initial value or zero, and the displacement of the pressure block detected by the grating ruler is still the initial value or zero. (6) The drive column moves down. After the pressure plate contacts the surface of the tongue spring, it begins to bend the tongue spring until the bottom surface of the tongue spring contacts the support plate. Since the push rod holds the pressure block, the readings of the pressure sensor and the grating ruler are still the initial value or zero or fluctuate slightly (for system error). (7) When the bottom of the tongue spring is... After the surface is in full contact with the support plate, it remains in contact for a period of time; (8) The top rod retracts, the tongue spring rebounds upward, driving the pressure block to move upward, changing the spring force, the pressure sensor detects the force value, and the grating ruler detects the pressure block movement distance; (9) After the controller receives the force value and the pressure block movement distance, it calculates the rebound amount through the program; (10) The drive column moves upward, and the pressure sensor and grating ruler are reset and initialized or returned to zero; (11) The electric telescopic rod drives the support plate to rotate until the support plate contacts the tongue spring again. The proximity sensor detects the angle of inclination of the support plate, i.e. the actual bending angle of the tongue spring. (12) Steps 5-11 can be repeated multiple times to record multiple sets of springback data and the actual bending angle of the tongue spring, and then calculate the tilt angle of the support plate that can be bent in one go; (13) Control the electric telescopic rod to drive the support plate to rotate and tilt to the calculated angle; (14) The top rod re-contacts the pressure block, the transfer plate rotates the next valve plate to the space between the pressure plate and the support plate, and the drive column moves down to start the bending operation. Except for the first valve plate, the bending of each valve plate tongue spring is done in one go. That is, after the lowered tongue spring contacts the support plate, the support column can move up directly back. The tongue spring rebounds and makes its bending angle fall within the qualified range.

7. The valve plate tongue spring micro-bending processing method according to claim 6, characterized in that: After each bending, the bending data of the tongue spring can be detected by rotating the support plate, and the data is recorded by the controller.

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