Powder metallurgy integral forming die

Abstract

The present invention relates to a powder metallurgy integral forming die in the field of powder metallurgy dies, including a fixed frame, a forming die is fixedly connected to the middle of the fixed frame; a movable powder injector is slidably connected to the fixed frame; the forming die includes a fixed plate, an installation hole is opened in the middle of the fixed plate, a hollow die column is clamped in the installation hole, an electric telescopic rod is arranged below the hollow die column, and the power output end of the electric telescopic rod is inserted into the hollow die column and fixedly connected with a demolding block; a temperature monitoring ring is sleeved on the upper end of the hollow die column, a pressurizing device is fixedly connected to the upper end of the fixed frame, a pressing unit matching the hollow die column is fixedly connected to the power output end of the pressurizing device, and an auxiliary lubrication structure is fixedly connected to the lower end of the temperature monitoring ring, realizing the friction temperature monitoring, auxiliary lubrication and post-lubrication detection of the powder metallurgy integral forming die, ensuring the stability of the forming process and the product quality.

Description

Technical Field

[0001] The present invention relates to a powder metallurgy integrated molding die, in particular to a powder metallurgy integrated molding die applied in the field of powder metallurgy molds. Background Art

[0002] Existing powder metallurgy integrated molding is an advanced manufacturing technology used to produce metal parts with complex shapes. This mold is made by filling metal powder into the mold and then forming the desired part through a pressing and sintering process. The design and manufacture of integrated molding requires precise engineering technology and material science knowledge to ensure the dimensional accuracy and mechanical properties of the parts.

[0003] The main advantage of this type of mold is that it can produce parts with complex structures, light weight and high strength, while reducing material waste and production costs. Powder metallurgy integrated molding molds are widely used in industries such as automobiles, aerospace, medical devices and electronics. With the continuous advancement of technology, the performance and application range of this type of mold are still expanding.

[0004] The specification of Chinese invention patent CN116727667B discloses a powder metallurgy forming die, including a die body, wherein a lubricant coating device is provided at the upper die punch of the die body; the lubricant coating device includes a coating belt, a drive module, and a lubricant spraying module. The invention provides a lubricant coating device corresponding to the upper die punch, so that the lubricant can be coated on the surface of the upper die punch during the process of pressing the blank by the upper die punch, thereby greatly reducing the friction loss between the upper die punch and the female die.

[0005] The specification of Chinese invention patent CN116550977B discloses a powder metallurgy rotary forming mold for an engine pulley, including a processing table and a rotary cutting device, wherein the bottom of the inner cavity of the processing table is fixedly connected to a control base plate, a traction push rod is slidably connected to the axis of the inner cavity of the control base plate, a closed sliding plate is fixedly connected to the top of the traction push rod, and a switching lever is rotatably connected to the axis of the inner cavity of the rotary cutting device. Each time the device pressurizes the inner cavity of the processing table, the metal powder near the cutting notch of the processing table can be absorbed into the interior of the docking pressure shell through the docking pressure shell, thereby avoiding the above-mentioned problems and recovering the metal powder at the same time.

[0006] During stamping and demolding, the related structures of existing powder metallurgy forming dies are prone to friction with the dies, especially when some metal powder raw materials with higher hardness are pressed into blanks. The friction loss of the inner wall of the dies will gradually increase, and finally cause the molding precision and quality of the dies to be greatly reduced. However, there are no wear monitoring and relubrication measures in the existing powder metallurgy forming dies. Summary of the invention

[0007] In view of the above-mentioned prior art, the technical problem to be solved by the present invention is that there are no measures for wear monitoring and supplementary lubrication in the existing powder metallurgy forming die.

[0008] To solve the above problems, the present invention provides a powder metallurgy integrated forming die, which includes a fixed frame, and a forming die is fixedly connected to the middle of the fixed frame; a movable powder injector is slidably connected to the fixed frame;

[0009] The forming die includes a fixing plate, an installation hole is opened in the middle of the fixing plate, a hollow die column is clamped in the installation hole, an electric telescopic rod is arranged below the hollow die column, a connecting rod is rotatably connected to the power output end of the electric telescopic rod, the connecting rod is inserted into the hollow die column and fixedly connected with a demolding block, a rod sleeve is sleeved on the connecting rod, and the rod sleeve is rotatably connected to the bottom end of the hollow die column; a stepping motor is installed in the fixed frame, and a transmission belt is connected between the power output end of the stepping motor and the rod sleeve;

[0010] A temperature monitoring ring is sleeved on the upper end of the hollow die column, and the temperature monitoring ring includes a fixed ring, and a plurality of uniformly distributed temperature sensors are fixedly connected to the fixed ring;

[0011] The upper end of the fixed frame is fixedly connected with a mounting plate matching the forming die, a pressing device is fixedly connected to the mounting plate, and a pressing unit matching the hollow die column is fixedly connected to the power output end of the pressing device. The pressing unit includes a fixed column, and a pressing block matching the hollow die column is arranged below the fixed column.

[0012] A spring telescopic column is rotatably connected between the pressing block and the fixed column, an electromagnet matching the pressing block is installed in the fixed column, a pair of electromagnetic bolts are fixedly connected to the inner wall of the lower end of the fixed column, and a fixing groove matching the movable end of the electromagnetic bolt is opened at the top end of the pressing block;

[0013] The lower end of the temperature monitoring ring is fixedly connected with an auxiliary lubrication structure. The auxiliary lubrication structure includes an oil guiding ring sleeved on the hollow die column, an oil injection pipe inserted into the hollow die column is fixedly connected to the output end of the oil guiding ring, and a spray head embedded in the inner wall of the hollow die column is connected to the top end of the oil injection pipe.

[0014] In the above-mentioned powder metallurgy integrated forming die, wear monitoring during the stamping process is realized, which is convenient for lubrication supplement of the stamping structure and the demolding structure.

[0015] As a further improvement of the present application, the hollow die column includes a positioning cylinder fixedly connected to the bottom end of the fixing plate, an inner die cylinder is detachably connected in the positioning cylinder, a plurality of oil discharge holes are opened at the bottom end of the positioning cylinder, the inner die cylinder includes an upper cylinder body and a lower cylinder body, a cavity is arranged in the upper cylinder body, and a plurality of pipe passing holes matching the oil injection pipe are opened on both the positioning cylinder and the lower cylinder body.

[0016] As a further improvement of the present application, a heat-conducting film is laid on the upper end of the inner wall of the mold cylinder, and the sensing end of the temperature sensor is inserted into the positioning cylinder and connected to the heat-conducting film.

[0017] As a further improvement of the present application, the movable powder injector includes a powder storage tank with a powder syringe. The powder storage tank slides relative to the fixed frame, and brush layers are fixedly connected to the upper and lower ends of the movable powder injector.

[0018] As another improvement of the present application, when the demolding module is in the initial position, the upper surface of the demolding module is located below the detection area of the temperature monitoring ring.

[0019] As a supplement to another improvement of the present application, a buffer is fixedly connected to the bottom end of the demolding module. When the demolding module is pressed and descends, the maximum descending position of the demolding module is located within the detection area of the temperature monitoring ring.

[0020] As a supplement to another improvement of the present application, an oil stain detection unit is fixedly connected to the bottom end of the temperature monitoring ring. The oil stain detection unit includes an ultraviolet lamp and an image acquisition device. A pair of detection holes are opened in the middle of the hollow die column, and the detection holes are filled with transparent resin.

[0021] As another improvement of the present application, an auxiliary forming system is further included. The auxiliary forming system includes a processor, and a control module, a data processing module, a monitoring module and a detection module are fixedly connected to the processor;

[0022] The control module is used to control the working of the pressurizing device, the auxiliary lubricating structure and the movable powder injector;

[0023] The monitoring module is used to control the temperature monitoring ring to monitor the temperature change of the inner wall of the hollow die column;

[0024] The detection module controls the oil stain detection unit to perform oil stain detection;

[0025] The data processing module is used to process the monitoring data and the detection data and make judgments.

[0026] As a supplement to another improvement of the present application, the specific working process of the oil stain detection includes: after the pressurizing block and the demolding module have both completed supplementary lubrication, control the demolding module to move to the auxiliary lubricating structure, and then perform fluorescence detection on the upper surface of the demolding module through the ultraviolet lamp and the image acquisition device. If the range of the fluorescence spots in the identified image exceeds the set value, it is determined that there is lubricating oil. At this time, drive the pressurizing block to move downward by a set distance, and the demolding module rises to fit with the surface of the fixed plate. At this time, control the movable powder injector to move between the two and run back and forth, so that the brush layers at the upper and lower ends of the movable powder injector clean the end faces of the demolding module and the pressurizing block.

[0027] In summary, the present solution realizes the friction temperature monitoring, auxiliary lubrication, and post-lubrication detection of the powder metallurgy integral forming die, ensuring the stability of the forming process and the product quality. When the die is subjected to a large frictional force, lubrication can be carried out in a timely manner, and the end face states of the demolding block and the pressure block can be detected after lubrication to ensure that the excess lubricating oil does not affect the subsequent powder composition, making it easy to adapt to the forming requirements of different metal powders, extending the service life of the die, and reducing the long-term operation cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 Is a three-dimensional view of the die according to the first and second embodiments of the present application;

[0029] Figure 2 Is a cross-sectional view of the die according to the first and second embodiments of the present application;

[0030] Figure 3 Is Figure 2 The schematic cross-sectional structure diagram at A in

[0031] Figure 4 Is Figure 2 The schematic cross-sectional structure diagram at B in

[0032] Figure 5 Is Figure 2 The schematic cross-sectional structure diagram at C in

[0033] Figure 6 Is the schematic diagram of the working state of the movable powder injector according to the first and second embodiments of the present application;

[0034] Figure 7 Is the three-dimensional cross-sectional view of the hollow die column according to the second embodiment of the present application;

[0035] Figure 8 Is the block diagram of the auxiliary forming system according to the second embodiment of the present application.

[0036] Explanation of the reference numerals in the figures:

[0037] 1. Fixed frame; 2. Forming die; 21. Fixed plate; 22. Hollow die column; 221. Positioning cylinder; 222. Inner die cylinder; 23. Electric telescopic rod; 24. Demolding block; 25. Connecting rod; 26. Rod sleeve; 3. Temperature monitoring ring; 31. Fixed ring; 32. Temperature sensor; 33. Oil stain detection unit; 4. Pressing device; 5. Pressing unit; 51. Fixed column; 52. Pressure block; 53. Spring telescopic column; 54. Electromagnet; 55. Electromagnetic bolt; 6. Auxiliary lubrication structure; 61. Oil guiding ring; 62. Oil injection pipe; 7. Movable powder injector. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0038] The following will describe in detail the two embodiments of the present application with reference to the accompanying drawings.

[0039] The first implementation mode:

[0040] Figure 1-7 A powder metallurgy integrally formed mold is shown, which includes a fixed frame 1, and a forming mold 2 is fixedly connected to the middle of the fixed frame 1; a movable powder injector 7 is slidably connected to the fixed frame 1; the movable powder injector 7 includes a powder storage tank with a powder injector, and the powder injector is used to inject the mixed powder in the powder storage tank into the mold. The powder injector is a powder injection device for powder metallurgy adopted by those skilled in the art using the prior art. The powder storage tank slides relative to the fixed frame 1, and brush layers are fixedly connected to the upper and lower ends of the movable powder injector 7;

[0041] The forming mold 2 includes a fixed plate 21, an installation hole is opened in the middle of the fixed plate 21, a hollow die column 22 is clamped in the installation hole, an electric telescopic rod 23 is arranged below the hollow die column 22, a connecting rod 25 is rotatably connected to the power output end of the electric telescopic rod 23, the connecting rod 25 is inserted into the hollow die column 22 and fixedly connected with a demolding block 24, a rod sleeve 26 is sleeved on the connecting rod 25, and the rod sleeve 26 is rotatably connected to the bottom end of the hollow die column 22; a stepping motor is installed in the fixed frame 1, and a transmission belt is connected between the power output end of the stepping motor and the rod sleeve 26;

[0042] The hollow die column 22 includes a positioning cylinder 221 fixedly connected to the bottom end of the fixed plate 21, an inner die cylinder 222 is detachably connected in the positioning cylinder 221, a plurality of oil discharge holes are opened at the bottom end of the positioning cylinder 221, and the positions of the oil discharge holes are close to the inner wall of the inner die cylinder 222; the inner die cylinder 222 includes an upper cylinder body and a lower cylinder body, a cavity is arranged in the upper cylinder body, and a plurality of pipe holes matching the injection oil pipe 62 are opened on both the positioning cylinder 221 and the lower cylinder body;

[0043] Optionally, the upper cylinder body and the lower cylinder body are designed as independent structures, and the inner die cylinder 222 is formed by splicing the upper cylinder body and the lower cylinder body;

[0044] When the demolding block 24 is in the initial position, the upper surface of the demolding block 24 is located below the detection area of the temperature monitoring ring 3, a buffer is fixedly connected to the bottom end of the demolding block 24, and when the demolding block 24 is pressed and descends, the maximum descending position of the demolding block 24 is located within the detection area of the temperature monitoring ring 3, and a suitable buffer device in the prior art is installed by those skilled in the art, such as a spring buffer;

[0045] A temperature monitoring ring 3 is sleeved on the upper end of the hollow die column 22. The temperature monitoring ring 3 includes a fixing ring 31, and a plurality of uniformly distributed temperature sensors 32 are fixedly connected to the fixing ring 31. A heat-conducting film is laid on the upper end inner wall of the inner die cylinder 222. The sensing end of the temperature sensor 32 is inserted into the positioning cylinder 221 and connected to the heat-conducting film. The sensing end of the temperature sensor 32 is telescopic. When the inner die cylinder 222 is disassembled, the sensing end of the temperature sensor 32 is retracted into the fixing ring 31.

[0046] The upper end of the fixing frame 1 is fixedly connected with a mounting plate matching the forming die 2. A pressing device 4 is fixedly connected to the mounting plate. The power output end of the pressing device 4 is fixedly connected with a pressing unit 5 matching the hollow die column 22. The pressing unit 5 includes a fixing column 51. A pressing block 52 matching the hollow die column 22 is arranged below the fixing column 51.

[0047] A spring telescopic column 53 is rotatably connected between the pressing block 52 and the fixing column 51. An electromagnet 54 matching the pressing block 52 is installed in the fixing column 51. A pair of electromagnetic bolts 55 are fixedly connected to the lower end inner wall of the fixing column 51. A fixing groove matching the movable end of the electromagnetic bolt 55 is opened at the top end of the pressing block 52. The spring telescopic column 53 includes a telescopic rod sleeved with a self-resetting spring. A permanent magnet matching the electromagnet 54 is fixedly connected to the top end of the pressing block 52. When the electromagnet 54 is turned on, it repels the permanent magnet.

[0048] The lower end of the temperature monitoring ring 3 is fixedly connected with an auxiliary lubrication structure 6. The auxiliary lubrication structure 6 includes an oil guiding ring 61 sleeved on the hollow die column 22. The output end of the oil guiding ring 61 is fixedly connected with an oil injection pipe 62 inserted into the hollow die column 22. The top end of the oil injection pipe 62 is connected with a nozzle embedded in the inner wall of the hollow die column 22.

[0049] When this solution works, after injecting metal powder into the hollow die column 22 through the movable powder injector 7, the pressing device 4 works to press the powder in the hollow die column 22 in the pressing unit 5. During the pressing process, the electromagnet 54 can be controlled to work, so that the pressing block 52 vibrates the metal powder in the hollow die column 22 multiple times to compact it tightly when stamping the metal powder in the hollow die column 22.

[0050] The specific working process of the electromagnet 54 is as follows: when the pressing block 52 is driven to complete a pressing and forming operation, the pressing block 52 is driven to rise by a set distance. At this time, the pressing block 52 is still located in the hollow die column 22.

[0051] Then the electromagnet 54 is turned on, so that the pressing block 52 repels the electromagnet 54, and then the pressing block 52 presses the metal powder again. After the electromagnet 54 is turned off, the pressing block 52 is reset by the action of the spring telescopic column 53. After detecting that the pressing block 52 is reset, the above steps are repeated to realize that the pressing block 52 presses the powder multiple times in a short time by intermittently switching the electromagnet, ensuring that the powder is compacted tightly.

[0052] During the stamping process, the temperature of the inner wall of the hollow die column 22 during the stamping of the spring telescopic column 53 is monitored by the temperature monitoring ring 3. When the temperature of the inner wall of the hollow die column 22 is higher than the set value during the stamping process, compensation lubrication work is carried out. At this time, after the pressing unit 5 completes the stamping work, it resets; after the part is demolded, the pressing block 52 is controlled to descend and fit with the demolding block 24 and maintain the set pressure. The fitting of the pressing block 52 and the demolding block 24 ensures that lubricating oil is not easily infiltrated into the end faces of the two, avoiding the pollution of the subsequent injected mixed powder by the lubricating oil. Then, the displacements of the pressing block 52 and the demolding block 24 are adjusted so that they both move to the auxiliary lubrication structure 6 (i.e., the lower cylinder area of the inner die cylinder 222), and the side walls of the pressing block 52 and the demolding block 24 are sprayed with lubricating oil through the oil injection pipe 62; the excess lubricating oil will flow downward and be discharged through the oil discharge hole at the bottom end of the positioning cylinder 221.

[0053] During specific oil spraying lubrication, by controlling the stepping motor to work, the transmission belt drives the rod sleeve 26 to rotate, so that the demolding block 24 rotates. At this time, the electromagnetic bolt 55 on the pressing block 52 resets. Under the mutual action between the demolding block 24 and the pressing block 52, the pressing block 52 rotates with the demolding block 24, realizing that the outer surfaces of the demolding block 24 and the pressing block 52 are fully lubricated by spraying, ensuring sufficient lubrication when the outer surfaces of the demolding block 24 and the pressing block 52 have complex shapes, and being easy to adapt to the lubrication of the pressing structure and the demolding structure during the processing of various shaped molds;

[0054] After the spraying lubrication work is completed, the stepping motor is controlled to work again to rotate the demolding block 24 to reset, and the electromagnetic bolt 55 resumes working to limit the pressing block 52.

[0055] Wear monitoring during the solid-line stamping process is realized, facilitating the lubrication supplement of the stamping structure and the demolding structure.

[0056] The second implementation method:

[0057] Figure 8 It is shown that an oil stain detection unit 33 is fixedly connected to the bottom end of the temperature monitoring ring 3. The oil stain detection unit 33 includes an ultraviolet lamp and an image acquisition device. A pair of detection holes are opened in the middle of the hollow die column 22, and the detection holes are filled with transparent resin. The detection holes are opened at the positioning cylinder 221 and the lower cylinder.

[0058] It further includes an auxiliary forming system. The auxiliary forming system includes a processor, and a control module, a data processing module, a monitoring module, and a detection module are fixedly connected to the processor;

[0059] The control module is used to control the working of the pressing device 4, the auxiliary lubrication structure 6, and the movable powder injector 7;

[0060] The monitoring module is used to control the temperature monitoring loop 3 to monitor the temperature change of the inner wall of the hollow die column 22;

[0061] The detection module controls the oil stain detection unit 33 to perform oil stain detection;

[0062] The data processing module is used to process the monitoring data and detection data and make judgments; an image recognition unit is set in the data processing module;

[0063] The specific working process of oil stain detection includes: after the pressure block 52 and the demolding module 24 both complete supplementary lubrication, control the demolding module 24 to move to the auxiliary lubrication structure 6, and then perform fluorescence detection on the upper surface of the demolding module 24 through an ultraviolet lamp and an image acquisition device (using the related technology of fluorescence detection of lubricating oil in the prior art). If the range of the fluorescence spot in the recognized image exceeds the set value, it is judged that there is lubricating oil. At this time, drive the pressure block 52 to move downward by a set distance, and the demolding module 24 rises to fit the surface of the fixed plate 21. At this time, control the movable powder injector 7 to move between the two and run back and forth, so that the brush layers at the upper and lower ends of the movable powder injector 7 clean the end faces of the demolding module 24 and the pressure block 52.

[0064] In summary, this solution realizes the friction temperature monitoring, auxiliary lubrication and post-lubrication detection of the powder metallurgy integral forming die, ensuring the stability of the forming process and the product quality; when the die is subjected to a large frictional force, lubrication can be carried out in a timely manner, and the end face states of the demolding module 24 and the pressure block 52 can be detected after lubrication, ensuring that the excess lubricating oil does not affect the subsequent powder composition, being easy to adapt to the forming requirements of different metal powders, extending the service life of the die, and reducing the long-term operation cost.

[0065] Combined with the current actual needs, the above-mentioned implementation manner adopted in this application, the protection scope is not limited to this. Within the knowledge scope of those skilled in the art, various changes made without departing from the concept of this application still fall within the protection scope of the present invention.

Claims

1. Powder metallurgy integral molding die, characterized in that: It includes a fixing frame (1), and a forming die (2) is fixedly connected to the middle of the fixing frame (1); an active powder injector (7) is slidably connected to the fixing frame (1); The forming die (2) includes a fixing plate (21), an installation hole is formed in the middle of the fixing plate (21), a hollow die column (22) is clamped in the installation hole, an electric telescopic rod (23) is arranged below the hollow die column (22), a connecting rod (25) is rotatably connected to the power output end of the electric telescopic rod (23), the connecting rod (25) is inserted into the hollow die column (22) and fixedly connected to a demolding block (24), a rod sleeve (26) is sleeved on the connecting rod (25), and the rod sleeve (26) is rotatably connected to the bottom end of the hollow die column (22); a stepping motor is installed in the fixing frame (1), and a transmission belt is connected between the power output end of the stepping motor and the rod sleeve (26); The hollow die column (22) includes a positioning cylinder (221) fixedly connected to the bottom end of the fixing plate (21), an inner mold cylinder (222) is detachably connected in the positioning cylinder (221), a plurality of oil discharge holes are formed at the bottom end of the positioning cylinder (221), the inner mold cylinder (222) includes an upper cylinder body and a lower cylinder body, a cavity is arranged in the upper cylinder body, and a plurality of pipe through holes matching the injection oil pipe (62) are formed on both the positioning cylinder (221) and the lower cylinder body; A temperature monitoring ring (3) is sleeved on the upper end of the hollow die column (22), the temperature monitoring ring (3) includes a fixing ring (31), and a plurality of uniformly distributed temperature sensors (32) are fixedly connected to the fixing ring (31); The upper end of the fixing frame (1) is fixedly connected with a mounting plate matching the forming die (2), a pressurizing device (4) is fixedly connected to the mounting plate, a pressing unit (5) matching the hollow die column (22) is fixedly connected to the power output end of the pressurizing device (4), the pressing unit (5) includes a fixing column (51), a pressing block (52) matching the hollow die column (22) is arranged below the fixing column (51), a spring telescopic column (53) is rotatably connected between the pressing block (52) and the fixing column (51), an electromagnet (54) matching the pressing block (52) is installed in the fixing column (51), a pair of electromagnetic bolts (55) are fixedly connected to the inner wall of the lower end of the fixing column (51), and a fixing groove matching the movable end of the electromagnetic bolt (55) is formed at the top end of the pressing block (52); The lower end of the temperature monitoring ring (3) is fixedly connected with an auxiliary lubrication structure (6), the auxiliary lubrication structure (6) includes an oil guide ring (61) sleeved on the hollow die column (22), an injection oil pipe (62) inserted into the hollow die column (22) is fixedly connected to the output end of the oil guide ring (61), and a nozzle embedded in the inner wall of the hollow die column (22) is connected to the top end of the injection oil pipe (62).

2. The powder metallurgy integral forming die according to claim 1, wherein: A heat conduction film is laid on the upper end inner wall of the mold cylinder (222), and the sensing end of the temperature sensor (32) is inserted into the positioning cylinder (221) and connected to the heat conduction film.

3. The powder metallurgy integral molding die according to claim 1, characterized in that: The movable powder injector (7) includes a powder storage tank with a powder syringe, the powder storage tank slides relative to the fixed frame (1), and brush layers are fixedly connected to the upper and lower ends of the movable powder injector (7).

4. The powder metallurgy integral forming die according to claim 1, wherein: When the demolding module (24) is in the initial position, the upper surface of the demolding module (24) is located below the detection area of the temperature monitoring ring (3).

5. The powder metallurgy integral forming die according to claim 1, characterized in that: A buffer is fixedly connected to the bottom end of the demolding module (24). When the demolding module (24) is pressed and descends, the maximum descending position of the demolding module (24) is within the detection area of the temperature monitoring ring (3).

6. The powder metallurgy integral molding die according to claim 1, wherein: An oil stain detection unit (33) is fixedly connected to the bottom end of the temperature monitoring ring (3). The oil stain detection unit (33) includes an ultraviolet lamp and an image acquisition device. A pair of detection holes are formed in the middle of the hollow die column (22), and the detection holes are filled with transparent resin.

7. The powder metallurgy integral molding die according to claim 6, wherein: It further includes an auxiliary molding system, and the auxiliary molding system includes a processor, and a control module, a data processing module, a monitoring module and a detection module are fixedly connected to the processor; The control module is used to control the working of the pressurizing device (4), the auxiliary lubrication structure (6) and the movable powder injector (7); The monitoring module is used to control the temperature monitoring ring (3) to monitor the temperature change of the inner wall of the hollow die column (22); The detection module controls the oil stain detection unit (33) to perform oil stain detection; The data processing module is used to process the monitoring data and the detection data and make judgments.

8. The powder metallurgy integral forming die according to claim 7, wherein: The specific working process of the oil stain detection includes: after the pressurizing block (52) and the demolding module (24) both complete supplementary lubrication, control the demolding module (24) to move to the auxiliary lubrication structure (6), and then perform fluorescence detection on the upper surface of the demolding module (24) through the ultraviolet lamp and the image acquisition device. If the range of the fluorescent spots in the recognized image exceeds the set value, it is judged that there is lubricating oil. At this time, drive the pressurizing block (52) to move downward by a set distance, and the demolding module (24) rises to fit the surface of the fixed plate (21). At this time, control the movable powder injector (7) to move between the two and perform a reciprocating operation, so that the brush layers at the upper and lower ends of the movable powder injector (7) clean the end faces of the demolding module (24) and the pressurizing block (52).

Images