A powder metallurgy processing and forming die for tiny metal sealing elements

Abstract

The present invention relates to the field of powder processing technology, and specifically to a powder metallurgy processing and forming mold for a tiny metal sealing element, comprising: a multi-stage stamping and blanking mechanism, wherein the multi-stage stamping and blanking mechanism comprises a multifunctional box for storing ferromagnetic metal powder and for stamping, and two partitions are longitudinally equidistantly arranged on the inner wall of the multifunctional box. The electromagnetic plate is energized by a PLC controller to magnetically attract an L-shaped baffle, so that the blanking port is opened, and the ferromagnetic metal powder enters the lower mold. At the same time, the piezoelectric ceramic sheet is energized to vibrate, so that the ferromagnetic metal powder is tightly filled into the lower mold, and then the second electric hydraulic telescopic rod is started, and the lower mold is initially stamped through the pressure plate and the second upper mold. At the same time, the second electric hydraulic telescopic rod will drive the conductive sheet to slide on the resistor plate, and the stamping depth is monitored in real time through the current detection module.

Description

Technical Field

[0001] The invention relates to the technical field of ferromagnetic metal powder processing, in particular to a powder metallurgy processing and forming die for a tiny metal sealing element. Background Art

[0002] Tiny metal sealing components usually refer to tiny metal parts used to seal and prevent liquid or gas leakage in various mechanical and electronic equipment, such as metal gaskets, O-rings, etc. The design and manufacture of these components require high-precision processes to ensure that their sealing performance can be maintained in extreme environments (such as high temperature, high pressure or corrosive media). The tiny metal sealing components usually require ferromagnetic metal powder to be placed in a mold and then cold-pressed. For example, a metal powder processing mold disclosed in application number CN202210788831.4 is a mold in which metal powder is placed in a mold and then processed and formed.

[0003] When the existing powder metallurgy processing and forming molds are used to produce tiny metal sealing elements, the elements are regular plates. In order to make the sealing elements fit the sealing surface more closely and provide higher sealing performance, ferromagnetic metal powder is usually used for production. Ferromagnetic metal powder can form an effective magnetic seal to prevent gas or liquid leakage. Therefore, ferromagnetic metal powder is usually put into the mold and then directly stamped. Since the ferromagnetic metal powder put into the mold is manually put, there will be a certain degree of error in the ferromagnetic metal powder each time. Therefore, the sealing elements formed after each stamping usually have inconsistent thickness and certain errors. In addition, the existing method is to put the ferromagnetic metal powder into the mold and then stamp it immediately. However, due to the difference in the fluidity of the ferromagnetic metal powder, the powder filling will be uneven, and the molded sealing elements may have problems such as uneven thickness and shape deviation, resulting in the dimensional accuracy and geometric shape of the parts failing to meet the design requirements. Summary of the invention

[0004] In view of the above-mentioned shortcomings of the prior art, the present invention provides a powder metallurgy processing and forming mold for a tiny metal sealing element, which can effectively solve the problems of errors in the prior art when putting ferromagnetic metal powder, and the problem of uneven powder filling due to the difference in the fluidity of the ferromagnetic metal powder after the ferromagnetic metal powder is put into the mold and immediately stamped.

[0005] To achieve the above objectives, the present invention is implemented through the following technical solutions:

[0006] The present invention provides a powder metallurgy processing and forming die for a tiny metal sealing element, comprising:

[0007] A multi-stage stamping and blanking mechanism, the multi-stage stamping and blanking mechanism comprises a multifunctional box for storing ferromagnetic metal powder and for stamping, the inner wall of the multifunctional box is longitudinally equidistantly provided with two partitions, the multifunctional box is sequentially divided into a primary stamping space, a storage space, and a secondary stamping space by the two partitions, the primary stamping space and the secondary stamping space are both provided with a stamping structure, ferromagnetic metal powder is stored in the storage space, a primary blanking component is provided in the storage space, a blanking port is provided at the bottom end of the storage space, and a secondary blanking component is provided at the bottom end of the multifunctional box opposite to the blanking port;

[0008] An operating frame is provided with an automatic discharging mechanism, the automatic discharging mechanism comprises a rotating drum arranged in the operating frame, the outer wall of the rotating drum is provided with four placement grooves opened in a circumferential array, and a detachable lower mold is arranged in the placement groove.

[0009] Preferably, the top of the operating frame is fixedly connected to an operating panel, the top of the operating panel is provided with a stamping groove, the bottom end of the operating frame is fixedly connected to a supporting frame, the top of the operating panel is fixedly connected to a supporting plate, the top of the support plate is fixedly connected to an extension plate, the bottom end of the extension plate is fixedly connected to a first electric hydraulic telescopic rod, the telescopic end of the first electric hydraulic telescopic rod is fixedly connected to a pressure plate, and the bottom end of the pressure plate is detachably provided with a first upper mold.

[0010] Preferably, the multi-stage stamping blanking mechanism also includes two symmetrical fixed plates fixedly connected to the top of the operating plate, a sliding rod fixedly connected between the two fixed plates, a reciprocating screw rod rotatably connected between the two fixed plates, an outer wall of one of the fixed plates is fixedly connected to a driving motor for driving the reciprocating screw rod, the outer wall of the reciprocating screw rod is provided with a connecting block slidably connected to the sliding rod, and the other end of the connecting block is fixedly connected to the multi-function box.

[0011] Preferably, the stamping structure includes a second electric hydraulic telescopic rod fixedly connected to the top wall in the primary stamping space and the secondary stamping space, the telescopic ends of the two second electric hydraulic telescopic rods are fixedly connected to a pressure plate, the bottom end of the pressure plate is removably provided with a second upper mold, and two telescopic holes corresponding to the positions of the two second electric hydraulic telescopic rods are opened at the bottom end of the multi-functional box a, and the primary stamping space is close to the driving motor.

[0012] Preferably, the initial unloading component also includes an electromagnetic plate fixedly connected to the side wall of the storage space, two symmetrical springs are fixedly connected to the side wall of the storage space, the other end of the spring is fixedly connected to an L-shaped baffle, a permanent magnet plate is embedded in the side of the L-shaped baffle close to the electromagnetic plate, the electromagnetic plate and the permanent magnet plate are magnetically attracted to each other, and a magnetic isolation telescopic plate is fixedly connected to the inner wall of the storage space, and the other end of the magnetic isolation telescopic plate is fixedly connected to the top of the L-shaped baffle.

[0013] Preferably, the secondary unloading component includes a unloading pipe fixedly connected at the bottom of the unloading port, an electromagnetic frame is fixedly connected to the inner wall of the unloading pipe, a resistor plate is fixedly connected to the inner wall of the primary stamping space, a conductive sheet is fixedly connected to the outer wall of the telescopic end of the second electric hydraulic telescopic rod in the primary stamping space and is in sliding contact with the resistor plate, the conductive sheet and the resistor plate are electrically connected to a PLC controller and form a detection circuit, the conductive sheet and the resistor plate constitute a sliding rheostat, and during the sliding of the conductive sheet on the resistor plate downward, the resistance of the sliding rheostat in the detection circuit gradually decreases, the PLC controller is electrically connected to the electromagnetic frame, the second electric hydraulic telescopic rod, the electromagnetic plate, and the first electric hydraulic telescopic rod to form a forming circuit, the inner wall of the multi-function box is fixedly connected to the fourth electric hydraulic telescopic rod, the telescopic end of the fourth electric hydraulic telescopic rod is fixedly connected to a magnetic isolation sheet, and the outer wall of the unloading pipe is provided with a slot that is in sliding contact with the magnetic isolation sheet.

[0014] Preferably, the automatic discharging mechanism includes a servo motor fixedly connected to the outer wall of the operating frame, the output end of the servo motor is fixedly connected to a rotating rod, the outer wall of the rotating rod is fixedly connected to the rotating drum, the inner wall of the placement groove is fixedly connected to a third electric hydraulic telescopic rod, the telescopic end of the third electric hydraulic telescopic rod is detachably arranged on the lower mold, a vibration chamber is opened inside the lower mold, the inner top wall of the vibration chamber is fixedly connected to a piezoelectric ceramic sheet, and the piezoelectric ceramic sheet is electrically connected to an external power supply.

[0015] Preferably, two symmetrical support rods are fixedly connected to the inner wall of the operating frame, and a filter is fixedly connected to the outer wall of the support rod and the inner wall of the operating frame. Four support blocks are arranged in a circular array on the outer wall of the rotating drum, and the tops of the support blocks are fixedly connected to infrared transmitters, and the bottom end of the operating panel is fixedly connected to an infrared receiver for receiving infrared rays. A discharge chute is provided on the side wall of the operating frame, and the infrared receiver, infrared transmitter, third electric hydraulic telescopic rod, piezoelectric and PLC controller are electrically connected to form a discharge circuit.

[0016] Preferably, the top of the operating panel is fixedly connected with an exhaust hood, the side wall of the operating frame is fixedly connected with an exhaust pump, the exhaust end of the exhaust pump is connected with the exhaust hood, and the exhaust end of the exhaust pump is connected with the inner wall of the operating frame.

[0017] Compared with the known prior art, the technical solution provided by the present invention has the following beneficial effects:

[0018] 1. The electromagnetic plate is energized through the PLC controller to magnetically attract the L-shaped baffle, so that the feed port is opened and the ferromagnetic metal powder enters the lower mold. At the same time, the piezoelectric ceramic sheet is energized to vibrate, so that the ferromagnetic metal powder is tightly filled into the lower mold. Then the second electric hydraulic telescopic rod is started, and the lower mold is initially punched through the pressure plate and the second upper mold. At the same time, the second electric hydraulic telescopic rod will drive the conductive sheet to slide on the resistor plate. The punching depth is monitored in real time through the current detection module, and then the pre-measured lower mold depth and the moving distance of the second lower mold can be calculated. The thickness of the required workpiece after the first stamping is determined, and the amount of ferromagnetic metal powder that needs to be added is determined based on the required thickness of the workpiece. Then, by controlling the magnetic attraction of the electromagnetic frame, the adsorption amount of the ferromagnetic metal powder can be accurately regulated so that the ferromagnetic metal powder that is not adsorbed falls into the lower die for stamping again. While meeting the thickness of the sealing element, it is ensured that excess ferromagnetic metal powder will not be wasted. The fourth electric hydraulic telescopic rod is used to control the magnetic isolation sheet to seal the slot to prevent magnetic force transmission between the ferromagnetic metal powders, thereby further reducing the waste of ferromagnetic metal powder.

[0019] 2. The pressure plate and the second upper mold are driven by the second electric hydraulic telescopic rod twice for stamping, and then the pressure plate and the first upper mold are driven by the first electric hydraulic telescopic rod for final stamping to complete the multi-stage stamping process. Through multi-stage stamping, the ferromagnetic metal powder can be compressed and filled multiple times to ensure a more uniform distribution in the mold, which can more effectively discharge the gaps between the powders and improve the density of the sealing element. High density means higher strength and better physical properties. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the prior art descriptions are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention, and for ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0021] Figure 1 Schematic diagram of the three-dimensional structure of the powder metallurgy processing mold of the tiny metal sealing element provided by the present invention Figure 1 ;

[0022] Figure 2 Schematic diagram of the three-dimensional structure of the powder metallurgy processing mold of the tiny metal sealing element provided by the present invention Figure 2 ;

[0023] Figure 3 A schematic diagram of the cross-sectional three-dimensional structure of a multifunctional box for a powder metallurgy processing mold for a tiny metal sealing element provided by the present invention Figure 1 ;

[0024] Figure 4 A schematic diagram of the cross-sectional three-dimensional structure of a multifunctional box for a powder metallurgy processing mold for a tiny metal sealing element provided by the present invention Figure 2 ;

[0025] Figure 5 A schematic diagram of the cross-sectional three-dimensional structure of a powder metallurgy processing mold for a tiny metal sealing element provided by the present invention;

[0026] Figure 6 A schematic diagram of the exploded three-dimensional structure of a rotating drum of a powder metallurgy forming mold for a tiny metal sealing element provided by the present invention;

[0027] Figure 7 A schematic diagram of the three-dimensional structure of a feed tube of a powder metallurgy forming die for a tiny metal sealing element provided by the present invention.

[0028] Figure numerals: 1, multi-stage stamping and unloading mechanism; 11a, multi-function box; 12a, partition; 13, primary stamping space; 14, storage space; 15, secondary stamping space; 16, primary unloading assembly; 161, unloading port; 162, electromagnetic plate; 163, spring; 164, L-shaped baffle; 165, magnetic isolation telescopic plate; 17, secondary unloading assembly; 171, unloading pipe; 172, electromagnetic frame; 173, resistor plate; 174, conductive sheet; 175, fourth electric hydraulic telescopic rod; 176, magnetic isolation sheet; 18, fixed plate; 19, sliding rod; 110, reciprocating screw rod; 111, driving motor; 112, connecting block; 113, second electric 1. hydraulic telescopic rod; 114. second upper mold; 115. telescopic hole; 2. operating frame; 3. automatic discharging mechanism; 31. rotating drum; 32. placement slot; 33. lower mold; 34. servo motor; 35. rotating rod; 36. third electric hydraulic telescopic rod; 37. vibration chamber; 38. piezoelectric ceramic sheet; 39. support rod; 310. filter screen; 311. support block; 312. infrared transmitter; 313. infrared receiver; 314. discharging slot; 4. operating panel; 5. stamping slot; 6. support frame; 7. support plate; 8. extension plate; 9. first electric hydraulic telescopic rod; 10. first upper mold; 11b. exhaust hood; 12b. exhaust pump. DETAILED DESCRIPTION

[0029] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0030] The present invention will be further described below in conjunction with the embodiments.

[0031] Example: Refer to Figures 1 to 7 , a powder metallurgy processing and forming mold for a tiny metal sealing element, comprising:

[0032] The ferromagnetic metal powder in the lower die 33 can be punched multiple times by the multi-stage punching and blanking mechanism 1. Figures 1 to 4 , Figure 7 The multi-stage stamping and unloading mechanism 1 comprises a multifunctional box 11a for storing ferromagnetic metal powder and for stamping. Two partitions 12a are longitudinally equidistantly arranged on the inner wall of the multifunctional box 11a. The multifunctional box 11a is divided into a primary stamping space 13, a storage space 14, and a secondary stamping space 15 in sequence by the two partitions 12a. Both the primary stamping space 13 and the secondary stamping space 15 are provided with stamping structures. Ferromagnetic metal powder is stored in the storage space 14. A primary unloading component 16 is arranged in the storage space 14. A unloading port 161 is provided at the bottom end of the storage space 14. A secondary unloading component 17 is arranged at a position opposite to the unloading port 161 at the bottom end of the multifunctional box 11a. The top end of the multifunctional box 11a has a discharge port corresponding to the storage space.

[0033] Among them, the multi-stage stamping blanking mechanism 1 also includes two symmetrical fixed plates 18 fixedly connected to the top of the operating plate 4, a sliding rod 19 fixedly connected between the two fixed plates 18, and a reciprocating screw 110 rotatably connected between the two fixed plates 18, wherein the outer wall of one of the fixed plates 18 is fixedly connected to a driving motor 111 for driving the reciprocating screw 110, and the outer wall of the reciprocating screw 110 is sleeved with a connecting block 112 slidably connected to the sliding rod 19, and the other end of the connecting block 112 is fixedly connected to the multi-function box 11a; the stamping structure includes a second electric hydraulic telescopic rod 113 fixedly connected to the top wall of the primary stamping space 13 and the secondary stamping space 15, the telescopic ends of the two second electric hydraulic telescopic rods 113 are fixedly connected to the pressure plate, and the bottom end of the pressure plate can be detachably provided with a second upper mold 114, and two telescopic holes 115 corresponding to the positions of the two second electric hydraulic telescopic rods 113 are opened at the bottom end of the multi-function box 11a, and the primary stamping space 13 is close to the driving motor 111.

[0034] The initial blanking is carried out through the following structure, refer to Figure 4 The initial unloading component 16 also includes an electromagnetic plate 162 fixedly connected to the side wall of the storage space 14. Two symmetrical springs 163 are fixedly connected to the side wall of the storage space 14. The other end of the spring 163 is fixedly connected to an L-shaped baffle 164. A permanent magnet plate is embedded on the side of the L-shaped baffle 164 close to the electromagnetic plate 162. The electromagnetic plate 162 and the permanent magnet plate are magnetically attracted to each other. A magnetic isolation telescopic plate 165 is fixedly connected to the inner wall of the storage space 14. The other end of the magnetic isolation telescopic plate 165 is fixedly connected to the top of the L-shaped baffle 164.

[0035] The secondary material cutting is carried out through the following structure, refer to Figure 3 The secondary unloading assembly 17 includes an unloading tube 171 fixedly connected to the bottom of the unloading port 161, an electromagnetic frame 172 is fixedly connected to the inner wall of the unloading tube 171, a resistor plate 173 is fixedly connected to the inner wall of the primary punching space 13, and a conductive sheet 174 that is in sliding contact with the resistor plate 173 is fixedly connected to the outer wall of the telescopic end of the second electric hydraulic telescopic rod 113 in the primary punching space 13. The conductive sheet 174 and the resistor plate 173 are electrically connected to a PLC controller to form a detection circuit. The conductive sheet 174 and the resistor plate 173 constitute a sliding rheostat. The conductive sheet 174 is on the resistor plate 173. During the downward sliding process, the resistance of the sliding rheostat in the detection circuit gradually decreases, and the PLC controller electrical signal is connected to the electromagnetic frame 172, the second electric hydraulic telescopic rod 113, the electromagnetic plate 162, and the first electric hydraulic telescopic rod 9 to form a molding circuit. The inner wall of the multi-function box 11a is fixedly connected to the fourth electric hydraulic telescopic rod 175, and the telescopic end of the fourth electric hydraulic telescopic rod 175 is fixedly connected to the magnetic isolation plate 176. The outer wall of the discharge pipe 171 is provided with a card groove that is in sliding contact with the magnetic isolation plate 176. The magnetic isolation plate 176 can prevent the discharged ferromagnetic metal powder from being re-adsorbed.

[0036] The stamped workpiece is automatically unloaded through the following structure, refer to Figure 5 , Figure 6 , an operation frame 2, an automatic discharging mechanism 3 is arranged in the operation frame 2, the automatic discharging mechanism 3 comprises a rotating drum 31 arranged in the operation frame 2, the outer wall of the rotating drum 31 is provided with four placement grooves 32 opened in a circumferential array, a detachable lower mold 33 is arranged in the placement groove 32, and the side wall of the operation frame 2 has a discharging groove for discharging the recovered ferromagnetic metal powder;

[0037] Among them, the automatic discharging mechanism 3 includes a servo motor 34 fixedly connected to the outer wall of the operating frame 2, and the output end of the servo motor 34 is fixedly connected to a rotating rod 35. The outer wall of the rotating rod 35 is fixedly connected to the rotating drum 31, and the inner wall of the placement groove 32 is fixedly connected to a third electric hydraulic telescopic rod 36. The telescopic end of the third electric hydraulic telescopic rod 36 is detachably arranged with the lower mold 33. A vibration chamber 37 is opened inside the lower mold 33, and a piezoelectric ceramic piece 38 is fixedly connected to the inner top wall of the vibration chamber 37. The piezoelectric ceramic piece 38 is electrically connected to an external power supply. Due to the inverse piezoelectric effect, when current is applied to the piezoelectric ceramic piece 38, due to the inverse piezoelectric effect, the piezoelectric ceramic piece 38 will undergo mechanical deformation. The piezoelectric ceramic piece 38 will undergo mechanical deformation. This deformation can cause the material structure inside the piezoelectric ceramic piece 38 to change, thereby generating current. The piezoelectric effect refers to the phenomenon that when certain dielectrics are subjected to mechanical stress (such as pressure or stretching), polarization will occur, and opposite charges will be generated on the upper and lower surfaces of the material, thereby forming an electric field. Conversely, when an electric field is applied to these materials, the material undergoes deformation (i.e. mechanical strain), which is called the inverse piezoelectric effect.

[0038] Among them, two symmetrical support rods 39 are fixedly connected to the inner wall of the operating frame 2, and the outer wall of the support rod 39 and the inner wall of the operating frame 2 are jointly fixedly connected with a filter screen 310, and the outer wall of the rotating drum 31 is provided with four support blocks 311 in a circular array, and the top of the support blocks 311 is fixedly connected with an infrared transmitter 312, and the bottom end of the operating panel 4 is fixedly connected with an infrared receiver 313 for receiving infrared rays, and the side wall of the operating frame 2 is provided with a discharge trough 314, and the infrared receiver 313, the infrared transmitter 312, the third electric hydraulic telescopic rod 36, and the piezoelectric are connected with the PLC controller electrical signal to form a discharge circuit.

[0039] An operating panel 4 is fixedly connected to the top of the operating frame 2, a stamping groove 5 is provided at the top of the operating panel 4, a supporting frame 6 is fixedly connected to the bottom of the operating frame 2, a supporting plate 7 is fixedly connected to the top of the operating panel 4, an extension plate 8 is fixedly connected to the top of the support plate 7, a first electric hydraulic telescopic rod 9 is fixedly connected to the bottom end of the extension plate 8, a pressure plate is fixedly connected to the telescopic end of the first electric hydraulic telescopic rod 9, a first upper mold 10 is detachably provided at the bottom end of the pressure plate, and sealing elements of different sizes can be stamped by replacing the lower mold 33 and the corresponding multiple upper molds.

[0040] The top of the operating panel 4 is fixedly connected to an exhaust hood 11b, the side wall of the operating frame 2 is fixedly connected to an exhaust pump 12b, the exhaust end of the exhaust pump 12b is connected to the exhaust hood 11b, and the exhaust end of the exhaust pump 12b is connected to the inner wall of the operating frame 2 for recovering ferromagnetic metal powder.

[0041] The working principle of the present invention is as follows:

[0042] First, start the drive motor 111, and drive the reciprocating screw rod 110 to rotate through the drive motor 111. The connection block 112 is limited by the sliding rod 19, so that the connection block 112 drives the multi-function box 11a to move. After the preset running time of the drive motor 111, after the first running cycle of the drive motor 111 is completed, the feed opening 161 will be moved to the top of the punching slot 5. After the second running cycle of the drive motor 111 is completed, the telescopic hole 115 of the primary punching space 13 will be driven to move to the top of the punching slot 5. After the third running cycle of the drive motor 111 is completed, the feed opening 161 will return to the top of the punching slot 5. After the fourth running cycle of the drive motor 111 is completed, the telescopic hole 115 of the secondary punching space 15 will be moved to the top of the punching slot 5. After the last running cycle of the drive motor 111, the multi-function box 11a will be reset.

[0043] When the feed port 161 moves to the top of the punching slot 5, the electromagnetic plate 162 is energized through the PLC controller, and then the electromagnetic plate 162 generates suction force on the permanent magnet plate in the L-shaped baffle 164, so that the L-shaped baffle 164 moves toward the electromagnetic plate 162, and then the L-shaped baffle 164 no longer blocks the feed port 161, and then the ferromagnetic metal powder enters the lower mold 33. At the same time, the piezoelectric ceramic sheet 38 is energized through the PLC controller to vibrate the piezoelectric ceramic sheet 38, so that the ferromagnetic metal powder is tightly filled into the lower mold 33. After the feed is completed, the fourth electric hydraulic telescopic rod 175 is controlled by the PLC controller to be inserted into the card slot, and then the feed pipe 171 is blocked to prevent the waste of ferromagnetic metal powder.

[0044] After the telescopic hole 115 of the initial stamping space 13 moves to just above the stamping slot 5, the second electric hydraulic telescopic rod 113 is controlled to start through the PLC controller, and the pressure plate and the second upper mold 114 are driven by the second electric hydraulic telescopic rod 113 in the initial stamping space 13 to stamp the lower mold 33. During the stamping process, the telescopic end of the second electric hydraulic telescopic rod 113 will drive the conductive sheet 174 to slide on the resistor plate 173, and the current passing through the sliding rheostat is detected by the current detection module in the PLC controller, and then the distance that the second electric hydraulic telescopic rod 113 drives the second lower mold 33 to move downward is fed back through the current, and then the thickness of the existing workpiece can be obtained according to the pre-measured depth of the lower mold 33 and the distance that the second lower mold 33 moves downward, and then the required thickness of the workpiece can be calculated. How much ferromagnetic metal powder is needed can be calculated, and then the current passed into the electromagnetic frame 172 is controlled by the PLC controller to start the fourth electric hydraulic telescopic rod 175 to make the spacer The magnetic sheet 176 no longer blocks the card slot, so that the ferromagnetic metal powder can fall normally, and then the electromagnetic frame 172 adsorbs the remaining powder in the discharge tube 171. The current passed into the electromagnetic frame 172 is controlled to control the magnetic attraction of the electromagnetic frame 172 to adjust the adsorption amount of the ferromagnetic metal powder, so that the ferromagnetic metal powder that is not adsorbed falls back into the lower mold 33, and then the fourth electric hydraulic telescopic rod 175 is restarted, and the magnetic isolation sheet 176 is driven by the fourth electric hydraulic telescopic rod 175 to be reinserted into the card slot to prevent the ferromagnetic metal powder from falling, and it can also prevent the magnetic force transmission between the ferromagnetic metal powders, and re-adsorb the ferromagnetic metal powder that has fallen, and then continue to start the drive motor 111. When the telescopic hole 115 of the secondary stamping space 15 moves to just above the stamping slot 5, the second electric hydraulic telescopic rod 113 is controlled to start by the PLC controller, and then the pressure plate and the second upper mold 114 are driven to stamp the lower mold 33 again, and then the multi-function box 11a is reset.

[0045] When the multifunctional box 11a is reset, the first electro-hydraulic telescopic rod 9 is started, and the pressure plate and the first upper mold 10 are driven downward by the first electro-hydraulic telescopic rod 9 to perform the final stamping.

[0046] When the stamping is completed, the exhaust pump 12b is started by the PLC controller, and the ferromagnetic metal powder remaining on the operating panel 4 is extracted through the exhaust hood 11b, and then discharged into the bottom of the operating frame 2 through the exhaust end (the exhaust speed is slow to prevent the ferromagnetic metal powder from being blown away in the operating frame 2).

[0047] Then, the third electric hydraulic telescopic rod 36 is controlled to retract through the PLC controller, so that the lower mold 33 is retracted into the placement groove 32, and the servo motor 34 is controlled to start, thereby driving the rotating drum 31 to rotate, and the lower mold 33 is driven to rotate through the rotating drum 31. When the other placement groove 32 is opposite to the punching groove 5, the infrared light emitted by the infrared transmitter 312 will be received by the infrared receiver 313. At this time, the servo motor 34 is controlled to stop rotating through the PLC controller, and then the third electric hydraulic telescopic rod 36 under the lower mold 33 that has just been punched is controlled by the PLC controller to push outward to push the lower mold 33. When the rotating drum 31 continues to rotate, the piezoelectric ceramic sheet 38 is energized again. Through gravity and the vibration of the piezoelectric ceramic sheet 38, the pressed workpiece will fall on the filter screen 310, and then the workpiece will be discharged through the discharge chute 314. Then the filter screen 310 filters the ferromagnetic metal powder, so that the ferromagnetic metal powder remaining on the surface of the workpiece falls to the bottom of the operating frame 2.

[0048] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements will not cause the essence of the corresponding technical solutions to deviate from the protection scope of the technical solutions of the embodiments of the present invention.

Claims

1. A powder metallurgy processing and forming die for a tiny metal sealing element, characterized in that: include: A multi-stage stamping blanking mechanism (1), the multi-stage stamping blanking mechanism (1) comprising a multifunctional box (11a) for storing ferromagnetic metal powder and for stamping, the inner wall of the multifunctional box (11a) being longitudinally equidistantly provided with two partitions (12a), the multifunctional box (11a) being divided into a primary stamping space (13), a storage space (14), and a secondary stamping space (15) by the two partitions (12a), the primary stamping space (13) and the secondary stamping space (15) being both provided with a stamping structure, the storage space (14) storing ferromagnetic metal powder, the storage space (14) being provided with a primary blanking component (16), the bottom end of the storage space (14) being provided with a blanking port (161), and the bottom end of the multifunctional box (11a) being provided with a secondary blanking component (17) at a position opposite to the blanking port (161); An operating frame (2), wherein an automatic discharging mechanism (3) is arranged in the operating frame (2), wherein the automatic discharging mechanism (3) comprises a rotating drum (31) arranged in the operating frame (2), wherein the outer wall of the rotating drum (31) is provided with four placement grooves (32) arranged in a circumferential array, and wherein a detachable lower mold (33) is arranged in the placement groove (32); The top of the operating frame (2) is fixedly connected to an operating panel (4), the top of the operating panel (4) is provided with a stamping groove (5), the bottom of the operating frame (2) is fixedly connected to a supporting frame (6), the top of the operating panel (4) is fixedly connected to a supporting plate (7), the top of the supporting plate (7) is fixedly connected to an extension plate (8), the bottom of the extension plate (8) is fixedly connected to a first electric hydraulic telescopic rod (9), the telescopic end of the first electric hydraulic telescopic rod (9) is fixedly connected to a pressure plate, and the bottom of the pressure plate is detachably provided with a first upper mold (10).

2. The powder metallurgy processing and forming mold of a tiny metal sealing element according to claim 1 is characterized in that: The multi-stage stamping blanking mechanism (1) further comprises two symmetrical fixed plates (18) fixedly connected to the top of the operating plate (4), a sliding rod (19) fixedly connected between the two fixed plates (18), and a reciprocating screw rod (110) rotatably connected between the two fixed plates (18), wherein a driving motor (111) for driving the reciprocating screw rod (110) is fixedly connected to the outer wall of one of the fixed plates (18), and a connecting block (112) slidably connected to the sliding rod (19) is sleeved on the outer wall of the reciprocating screw rod (110), and the other end of the connecting block (112) is fixedly connected to the multi-function box (11a).

3. The powder metallurgy processing and forming mold of a tiny metal sealing element according to claim 2 is characterized in that: The punching structure comprises a second electric hydraulic telescopic rod (113) fixedly connected to the top wall of the primary punching space (13) and the secondary punching space (15); the telescopic ends of the two second electric hydraulic telescopic rods (113) are fixedly connected to a pressure plate; the bottom end of the pressure plate is detachably provided with a second upper mold (114); the bottom end of the multifunctional box (11a) is provided with two telescopic holes (115) corresponding to the positions of the two second electric hydraulic telescopic rods (113), and the primary punching space (13) is located near the drive motor (111).

4. The powder metallurgy processing and forming die of a tiny metal sealing element according to claim 3 is characterized in that: The initial unloading component (16) further comprises an electromagnetic plate (162) fixedly connected to the side wall of the storage space (14); two symmetrical springs (163) are fixedly connected to the side wall of the storage space (14); the other end of the spring (163) is fixedly connected to an L-shaped baffle (164); a permanent magnetic plate is embedded on a side of the L-shaped baffle (164) close to the electromagnetic plate (162); the electromagnetic plate (162) and the permanent magnetic plate are magnetically attracted to each other; a magnetic isolation telescopic plate (165) is fixedly connected to the inner wall of the storage space (14); the other end of the magnetic isolation telescopic plate (165) is fixedly connected to the top of the L-shaped baffle (164).

5. The powder metallurgy processing and forming die of a tiny metal sealing element according to claim 4, characterized in that: The secondary material discharge assembly (17) comprises a material discharge pipe (171) fixedly connected to the bottom of the material discharge port (161), an electromagnetic frame (172) fixedly connected to the inner wall of the material discharge pipe (171), a resistor plate (173) fixedly connected to the inner wall of the primary punching space (13), a conductive sheet (174) in sliding contact with the resistor plate (173) fixedly connected to the outer wall of the telescopic end of the second electric hydraulic telescopic rod (113) in the primary punching space (13), the conductive sheet (174) and the resistor plate (173) being electrically connected to a PLC controller to form a detection circuit, and the conductive sheet (174) and the resistor plate (173) forming a sliding contact. A variable resistor, wherein during the downward sliding process of the conductive sheet (174) on the resistance plate (173), the resistance of the sliding variable resistor in the detection circuit gradually decreases, the PLC controller is electrically connected to an electromagnetic frame (172), a second electric hydraulic telescopic rod (113), an electromagnetic plate (162), and a first electric hydraulic telescopic rod (9) to form a molding circuit, the inner wall of the multifunctional box (11a) is fixedly connected to a fourth electric hydraulic telescopic rod (175), the telescopic end of the fourth electric hydraulic telescopic rod (175) is fixedly connected to a magnetic isolation sheet (176), and the outer wall of the feed tube (171) is provided with a slot that is in sliding contact with the magnetic isolation sheet (176).

6. The powder metallurgy processing and forming die of a tiny metal sealing element according to claim 1, characterized in that: The automatic discharging mechanism (3) comprises a servo motor (34) fixedly connected to the outer wall of the operating frame (2); the output end of the servo motor (34) is fixedly connected to a rotating rod (35); the outer wall of the rotating rod (35) is fixedly connected to the rotating drum (31); the inner wall of the placement groove (32) is fixedly connected to a third electric hydraulic telescopic rod (36); the telescopic end of the third electric hydraulic telescopic rod (36) is detachably arranged with the lower mold (33); a vibration chamber (37) is provided inside the lower mold (33); a piezoelectric ceramic sheet (38) is fixedly connected to the inner top wall of the vibration chamber (37); and the piezoelectric ceramic sheet (38) is electrically connected to an external power supply.

7. The powder metallurgy processing and forming die of a tiny metal sealing element according to claim 6, characterized in that: The inner wall of the operating frame (2) is fixedly connected to two symmetrical support rods (39); the outer wall of the support rod (39) and the inner wall of the operating frame (2) are jointly fixedly connected to a filter screen (310); the outer wall of the rotating drum (31) is provided with four support blocks (311) in a circumferential array; the tops of the support blocks (311) are each fixedly connected to an infrared transmitter (312); the bottom end of the operating panel (4) is fixedly connected to an infrared receiver (313) for receiving infrared rays; a discharge trough (314) is provided on the side wall of the operating frame (2); the infrared receiver (313), the infrared transmitter (312), the third electric hydraulic telescopic rod (36), and the piezoelectric are connected to a PLC controller via electrical signals to form a discharge circuit.

8. The powder metallurgy processing and forming die of a tiny metal sealing element according to claim 1, characterized in that: The top end of the operating panel (4) is fixedly connected to an exhaust hood (11b), the side wall of the operating frame (2) is fixedly connected to an exhaust pump (12b), the exhaust end of the exhaust pump (12b) is connected to the exhaust hood (11b), and the exhaust end of the exhaust pump (12b) is connected to the inner wall of the operating frame (2).

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