Scratch-proof positioning punch forming mechanism for metal frame of powder packaging machine

Abstract

The present application relates to the technical field of punch dies, and particularly relates to a scratch-proof positioning punch forming mechanism for a metal rack of a powder packaging machine, which comprises a base, a top plate fixedly connected to the top of the base through a plurality of guide struts, a punch plate slidingly connected between the guide struts, a punch convex die and a punch concave die detachably installed at the bottom of the punch plate and the top of the base respectively, and a scratch-proof punch assembly provided at the top of the punch plate and capable of flexibly pre-pressing the metal rack first, then instantaneously impacting and punching, and then rigidly re-pressing and holding pressure. The present application realizes three-stage forming of a plate through linkage of the punch assembly, avoids rigid scratching through elastic pre-pressing, reduces frictional damage through instantaneous impact, stabilizes accuracy through holding pressure and re-pressing, and forms double scratch-proof protection through automatic oiling of the oiling assembly, so as to protect the plate surface finish and plating layer, and improve the degree of automation and the punch quality.

Description

Technical Field

[0001] This invention relates to the field of stamping die technology, and in particular to a scratch-resistant positioning stamping forming mechanism for the metal frame of a powder packaging machine. Background Technology

[0002] The metal frames of powder packaging machines are mostly made of cold-rolled steel plates, stainless steel plates and structural steel components. They rely on stamping, bending, punching, blanking and forming to replace cutting. However, the related forming mechanisms generally adopt an integral rigid direct pressure operation structure without flexible pre-pressure buffer structure and phased timing stamping logic. During operation, they rely on rigid positioning blocks, fixed stop pins and molds to directly and rigidly contact and forcefully press the surface of the frame plate. There is no buffer transition in the initial contact, which easily forms hard indentations, edge and corner bumps and edge chipping and other defects on the surface of the frame components made of stainless steel and cold-rolled steel plates.

[0003] Meanwhile, the stamping process often adopts a uniform and slow downward pressure mode, which results in a long contact time between the die and the frame plate. The continuous relative sliding friction between the sheet metal and the die can easily occur, which can easily cause damage such as wire drawing, scratches, and fine scratches on the plate surface. This seriously damages the original smoothness of the exposed plate surface of the frame, the integrity of the protective coating and the substrate, reduces the efficiency of batch stamping production, and makes it difficult to meet the large-scale stamping processing requirements of high precision, high appearance quality and no rework required for the metal frame of the powder packaging machine.

[0004] To address the aforementioned technical deficiencies, a solution is proposed that aims to provide automated stamping processing of metal frame plates for powder packaging machines with high precision, scratch resistance, and minimal rework through a dual protection mechanism of stamping-linked sequential forming and automatic oil lubrication. Summary of the Invention

[0005] The purpose of this invention is to provide a scratch-resistant positioning stamping and forming mechanism for the metal frame of a powder packaging machine, in order to solve the aforementioned technical defects.

[0006] The objective of this invention can be achieved through the following technical solution: a scratch-resistant positioning stamping forming mechanism for the metal frame of a powder packaging machine, comprising a base, a top plate fixedly connected to the top of the base by multiple guide pillars, a stamping plate slidably connected between the guide pillars, and a stamping punch and a stamping die detachably installed on the bottom of the stamping plate and the top of the base, respectively.

[0007] The top of the stamping plate is provided with an anti-scratch stamping assembly that performs flexible pre-pressing, instantaneous impact stamping, and subsequent pressure-holding rigid re-pressing on the metal frame. The anti-scratch stamping assembly includes a stamping rod, an impact rod, and an impact block.

[0008] The base is provided with an oil coating component for coating the surface of the stamping die with lubricating oil for secondary damage prevention and protection. The oil coating component includes an oil outlet seat and an elastic oil scraper installed below the oil outlet seat. The base is provided with a material ejector component that works with the oil coating component to unload the metal frame stamping parts.

[0009] Preferably, a stamping column is provided between the stamping plate and the top plate and is slidably connected to the guide support. A hydraulic cylinder for pushing the stamping column to rise and fall is fixedly installed on the top plate. The stamping column has an upper cavity and a lower cavity that are connected to each other. The stamping rod is fixedly installed on the top of the stamping plate and slidably connected to the stamping column. The top end of the stamping rod extends into the lower cavity and is fixedly connected to a hemispherical block.

[0010] Preferably, the impact rod is located in the lower cavity, and the top of the impact rod extends into the upper cavity. The bottom of the impact rod is fixedly connected to an abutment plate that moves against the hemispherical block. A spring is fixedly connected between the top of the abutment plate and the top of the lower cavity. The impact block is slidably connected in the upper cavity for the instantaneous impact of the impact rod.

[0011] Preferably, a second spring is fixedly connected between the top of the impact block and the top of the upper cavity, and a spherical surface is provided at the bottom of the impact block to abut against the top of the impact rod, and an impact hole is provided at the top of the spherical surface.

[0012] Preferably, an L-shaped support plate is fixedly connected to one side of the base, and a U-shaped frame is installed on the L-shaped support plate by an electric push rod. An oil storage box is rotatably installed inside the U-shaped frame, and a conical oil outlet bladder communicating with the oil outlet seat is fixedly connected to the bottom of the oil storage box.

[0013] Preferably, the U-shaped frame is fixedly connected to a support rod that is slidably connected to the L-shaped support plate, and a servo motor for driving the oil reservoir to deflect.

[0014] Preferably, multiple oil outlet micro-holes are equidistantly opened on the inner walls of both sides of the oil outlet seat along its length direction, an oil outlet slit is opened through the bottom of the oil storage box, and an elastic plate for resisting the oil outlet slit is fixedly connected to one side of the bottom of the oil storage box.

[0015] Preferably, resistance plates are provided on both sides of the oil outlet seat, and multiple L-shaped elastic rods are fixedly connected between the resistance plates and the bottom of the oil storage box. A rubber pad that blocks the corresponding oil outlet micro-hole and is inclined is fixedly connected between the oil outlet seat and the resistance plate.

[0016] Preferably, the ejector assembly includes ejector blocks located on both sides of the stamping die, and a lower pressure plate that matches the stamping plate is fixedly connected to the ejector block. A spring is fixedly connected between the ejector block and the base, and a movable seat that is slidably connected to the base is fixedly connected to the bottom of the ejector block.

[0017] The beneficial effects of this invention are as follows:

[0018] (1) This invention realizes the sequential logic of first soft and then punching, and realizes the three-stage forming of metal frame plate of powder packaging machine: soft pre-pressing, instantaneous impact punching, and holding pressure rigid re-pressing. First, the plate is softly attached and pre-positioned by elastic contact, avoiding the indentation, bumping and edge chipping defects caused by traditional rigid positioning hard top. Then, the high-speed impact punching is formed by instantaneous release of spring potential energy, which greatly shortens the interaction time between the mold and the plate surface. There is almost no relative slippage between the plate and the mold, which effectively suppresses friction and scratches. The subsequent holding pressure re-pressing can release the internal stress of the plate in time, offset the springback, warping and deformation of stainless steel and cold rolling frame plate, stabilize the hole position and folding forming accuracy. There is no hard extrusion or continuous friction throughout the process, which completely protects the original smoothness and coating integrity of the frame plate surface and reduces the subsequent grinding and rework process.

[0019] (2) The present invention also utilizes the deflection of the servo motor, the deformation and sealing logic of the L-shaped elastic rod and the rubber pad to realize the controllable intermittent seepage of lubricating oil and the uniform flow of the lubricating oil along the elastic scraper to the die cavity of the stamping die: the working surface of the die can be automatically and evenly coated with oil before and after each stamping to form a continuous lubrication and protection layer, which greatly reduces the dry friction between the frame sheet and the die, further weakens the minor scratches caused by stamping slippage from the die contact level, and forms a dual protection of structural anti-scratch and lubrication anti-scratch. It also relies on elastic deformation reset to realize automatic oil replenishment and control of oil flow, continuously maintain the lubrication state of the die working surface, and effectively ensure the quality of the frame stamping plate surface.

[0020] (3) After the sheet is placed, the present invention also relies on the pre-pressing effect to automatically fit the die to complete the initial positioning and fixing before stamping, so as to avoid the workpiece lifting, offset and displacement during the stamping process. After the stamping is completed, the spring three elastic forces drive the top block to automatically lift and reset, so as to realize the synchronous automatic ejection and unloading of the stamped parts. At the same time, the oiling component can push the stamped parts in the direction of the translation process, assisting the workpiece to smoothly leave the station, realizing the integrated linkage operation of stamping, anti-scratch protection, automatic oiling, positioning and automatic unloading, improving the continuity and production efficiency of frame plate stamping processing, and adapting to the batch standardized stamping forming needs of powder packaging machine metal frame. Attached Figure Description

[0021] The invention will now be further described with reference to the accompanying drawings;

[0022] Figure 1 This is a schematic diagram of the structure of the present invention;

[0023] Figure 2 This is a structural schematic diagram from another perspective of the present invention;

[0024] Figure 3 This is a schematic diagram showing the disassembled base and top material assembly of the present invention;

[0025] Figure 4 This is a schematic diagram of the anti-scratch stamping component of the present invention;

[0026] Figure 5 This is a schematic diagram of the structure of the oil-coating component of the present invention;

[0027] Figure 6 This is a schematic diagram of the structure of the oil storage box of the present invention;

[0028] Figure 7 This is a schematic diagram showing the connection between the oil outlet seat and the conical oil outlet bladder of the present invention.

[0029] Legend:

[0030] 1. Base; 11. Guide pillar; 12. Top plate; 13. Stamping plate; 14. Stamping punch; 15. Stamping die; 16. Hydraulic cylinder; 17. Electric push rod;

[0031] 2. Anti-scratch stamping assembly; 21. Stamping rod; 22. Impact rod; 23. Impact block; 24. Stamping column; 25. Spring 1; 26. Spring 2; 27. Impact hole;

[0032] 3. Oil covering assembly; 31. Oil outlet seat; 32. Elastic oil scraper; 33. U-shaped frame; 34. Oil storage box; 35. Conical oil outlet bladder; 36. Servo motor; 37. Oil outlet micro-hole; 38. Oil outlet slit; 39. Elastic plate; 310. Resistance plate; 311. L-shaped elastic rod; 312. Rubber pad;

[0033] 4. Top material assembly; 41. Top material block; 42. Lower pressure plate; 43. Spring three; 44. Movable seat. Detailed Implementation

[0034] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0035] Example 1: Please refer to Figures 1-4 As shown, the traditional stamping process often adopts a uniform and slow downward pressure mode, which results in a long contact time between the die and the frame plate, and continuous relative sliding friction between the sheet metal and the die, which can easily lead to damage such as wire drawing, scratches, and fine scratches on the sheet metal surface. The following solutions can be used to solve these problems.

[0036] The anti-scratch positioning stamping forming mechanism for the metal frame of the powder packaging machine in this embodiment includes a base 1. The top of the base 1 is fixedly connected to a top plate 12 through multiple guide pillars 11. A stamping plate 13 is slidably connected between the guide pillars 11. A stamping punch 14 and a stamping die 15 are detachably installed on the bottom of the stamping plate 13 and the top of the base 1, respectively. The stamping punch 14 and the stamping die 15 can be connected by bolts, which facilitates the replacement of molds of different shapes and expands the processing range.

[0037] The top of the stamping plate 13 is equipped with an anti-scratch stamping component 2, which first performs flexible pre-pressing on the metal frame, then instantaneous impact stamping, and finally pressure holding and rigid re-pressing. The anti-scratch stamping component 2 includes a stamping rod 21, an impact rod 22, and an impact block 23. Through the anti-scratch stamping component 2, the metal frame sheet is first gently fitted and pre-positioned with elastic contact, avoiding the indentation, bumping, and edge-biting defects caused by traditional rigid positioning and hard top. Then, through instantaneous high-speed impact stamping, the interaction time between the mold and the sheet surface is greatly shortened. There is almost no relative slippage between the sheet and the mold, which effectively suppresses friction and scratches. The subsequent pressure holding and re-pressing can release the internal stress of the sheet in time, offset the springback, warping, and deformation of stainless steel and cold-rolled frame plates during stamping, stabilize the hole position and the edge forming accuracy. There is no hard extrusion or continuous friction throughout the process, which completely protects the original smoothness and coating integrity of the frame plate surface and reduces subsequent grinding and rework processes.

[0038] The base 1 is provided with an oil coating component 3 for coating the surface of the stamping die 15 with lubricating oil for secondary damage prevention and protection. The oil coating component 3 includes an oil outlet seat 31 and an elastic oil scraper 32 installed below the oil outlet seat 31. The base 1 is provided with a top material assembly 4 for self-unloading of metal frame stamping parts in cooperation with the oil coating component 3.

[0039] A stamping column 24 is provided between the stamping plate 13 and the top plate 12 and is slidably connected to the guide column 11. A hydraulic cylinder 16 is fixedly installed on the top plate 12 to push the stamping column 24 up and down. The stamping column 24 has an upper cavity and a lower cavity that are connected to each other. The stamping rod 21 is fixedly installed on the top of the stamping plate 13 and is slidably connected to the stamping column 24.

[0040] The hydraulic cylinder 16 pushes the stamping column 24 down, and the stamping column 24 abuts against the stamping plate 13, causing the stamping punch 14 to perform a pressure-holding rigid re-pressing on the metal frame plate, further eliminating springback, warping and deformation after stamping, and stabilizing the stamping forming accuracy. The top of the stamping rod 21 extends into the lower cavity and is fixedly connected to a hemispherical block. The hemispherical block is used to drive the stamping rod 21 to rise simultaneously when the stamping column 24 rises, which is used to lift the stamping punch 14.

[0041] The impact rod 22 is located in the lower cavity, and the top of the impact rod 22 extends into the upper cavity. The bottom of the impact rod 22 is fixedly connected to an abutment plate that moves against the hemispherical block. A spring 25 is fixedly connected between the top of the abutment plate and the top of the lower cavity. The impact block 23 is slidably connected in the upper cavity for the instantaneous impact of the impact rod 22. The spring 25 is used to maintain the moving contact between the impact rod 22 and the stamping rod 21.

[0042] Before the stamping plate 13 descends for pre-stamping, there is a certain elastic resistance between the stamping column 24 and the stamping rod 21, which assists in the initial positioning process before instantaneous stamping. In addition, the spring 25, in conjunction with the hemispherical block and the contact plate, assists the impact rod 22 to be in an inclined state before the stamping rod 21 rises relative to the stamping column 24, so that the impact rod 22 can be transformed into a vertical state later, thus achieving the effect of impact.

[0043] A spring 26 is fixedly connected between the top of the impact block 23 and the top of the upper cavity. The bottom of the impact block 23 is provided with a spherical surface that abuts against the top of the impact rod 22. Through the spherical surface, when there is a large abutting force between the impact rod 22 and the impact block 23, the auxiliary impact rod 22 changes from an inclined state to a vertical state. The top of the spherical surface is provided with an impact hole 27.

[0044] The stamping punch 14 abuts against the top of the metal frame sheet, the stamping rod 21 moves upward relative to the stamping column 24, the top of the impact rod 22 abuts against the impact block 23, and the spring 1 25 and the spring 2 26 are compressed synchronously, so that the stamping punch 14 flexibly pre-presses the metal frame sheet, realizing the soft fit and pre-deformation of the metal frame sheet.

[0045] The contact force between the impact rod 22 and the impact block 23 continues to increase. Guided by the spherical surface to the top of the impact rod 22, the top of the impact rod 22 moves into the impact hole 27 of the impact block 23. There is a relative movement gap between the impact rod 22 and the impact block 23. The compressive elastic potential energy of the spring 1 25 and the spring 26 is released rapidly, causing the impact block 23 to impact the impact rod 22 instantaneously.

[0046] The instantaneous impact force is transmitted to the stamping punch 14 through the stamping rod 21, causing the stamping punch 14 to perform a secondary instantaneous high-speed impact stamping process on the metal frame sheet. The interaction time between the die and the sheet is extremely short, and there is almost no relative slippage between the sheet and the die. The instantaneous impact and secondary fast stamping suppress dynamic friction scratches, and release the stamping internal stress of the sheet in an instant, so as to achieve high-quality stamping forming.

[0047] The ejector assembly 4 includes ejector blocks 41 located on both sides of the stamping die 15. Magnets are embedded in the top of the ejector blocks 41 for initial adsorption and fixation of the placed sheet metal. A lower pressure plate 42 that cooperates with the stamping plate 13 is fixedly connected to the ejector blocks 41. A spring 43 is fixedly connected between the ejector blocks 41 and the base 1. A movable seat 44 that is slidably connected to the base 1 is fixedly connected to the bottom of the ejector blocks 41.

[0048] The metal frame sheet is placed between the tops of the two sets of top blocks 41. The stamping rod 21 carries the stamping plate 13 and pushes the stamping punch 14 down. The stamping plate 13 first contacts the lower pressure plate 42, pushing the top block 41 to compress the spring 3 43 and move down, causing the metal frame sheet to first fit against the stamping die 15, so that the stamping punch 14 can perform flexible pre-pressing and instantaneous impact stamping on the metal frame sheet. The stamping plate 13 and the stamping punch 14 rise, and the top block 41 rises and resets synchronously through the compression force of the spring 3 43, automatically pushing the stamped part to rise and be taken out from the stamping die 15.

[0049] Example 2: Please refer to Figure 3 and Figures 5-7 As shown, the problem that dry friction still exists between the frame sheet and the die, making it impossible to further weaken the micro-scratches caused by stamping slippage from the die contact level, can be solved by the following solution;

[0050] An L-shaped support plate is fixedly connected to one side of the base 1, and a U-shaped frame 33 is installed on the L-shaped support plate via an electric push rod 17. An oil storage box 34 is rotatably installed inside the U-shaped frame 33. A conical oil outlet bladder 35 connected to the oil outlet seat 31 is fixedly connected to the bottom of the oil storage box 34. The electric push rod 17 pushes the oil storage box 34 to move towards the top of the stamping die 15.

[0051] The elastic scraper 32 bends and deforms when it contacts the top of the die cavity of the stamping die 15. The conical oil outlet 35 undergoes extrusion deformation to extrude lubricating oil. During the continuous translation of the oil storage box 34, the oil storage box 34 continuously deflects. By continuously increasing the bending deformation of the elastic scraper 32, the degree of extrusion of the conical oil outlet 35 is indirectly increased, so that the lubricating oil flows out continuously to complete the uniform oiling treatment of the stamping die 15.

[0052] The U-shaped frame 33 is fixedly connected to a support rod that is slidably connected to the L-shaped support plate, and a servo motor 36 is used to drive the oil reservoir 34 to deflect.

[0053] Multiple oil outlet micro-holes 37 are equidistantly opened on the inner walls of both sides of the oil outlet seat 31 along its length direction. The diameter of the oil outlet micro-holes 37 is smaller than the width of the oil outlet slit 38. An oil outlet slit 38 is opened through the bottom of the oil storage box 34. An elastic plate 39 for abutting the oil outlet slit 38 is fixedly connected to one side of the bottom of the oil storage box 34. The conical oil outlet bladder 35 forms a squeezing deformation, and the hydraulic pressure of the lubricating oil inside it increases, pushing the elastic plate 39 to block the oil outlet slit 38 at the bottom of the oil storage box 34 on one side. The lubricating oil in the conical oil outlet bladder 35 flows out from the multiple oil outlet micro-holes 37 on the forward side of the oil outlet seat 31 and flows down along the elastic scraper 32 to contact the mold cavity of the stamping die 15.

[0054] The servo motor 36 drives the oil storage box 34 to continuously deflect, causing the elastic scraper 32 to separate from the mold cavity of the stamping die 15. The conical oil outlet 35 automatically deforms and resets, forming an expansion recovery. Because the diameter of the oil outlet micro-hole 37 is small, the negative pressure state inside cannot be quickly restored. The elastic plate 39 is automatically pushed to open the oil outlet slit 38, and oil is drawn from the oil storage box 34 to replenish it.

[0055] Both sides of the oil outlet seat 31 are provided with resistance plates 310, and multiple L-shaped elastic rods 311 are fixedly connected between the resistance plates 310 and the bottom of the oil storage box 34. A rubber pad 312 that blocks the corresponding oil outlet micro-hole 37 and is inclined is fixedly connected between the oil outlet seat 31 and the resistance plates 310. The servo motor 36 drives the oil storage box 34 to deflect, so that one side of the elastic scraper 32 abuts against the mold cavity of the stamping die 15, and the elastic scraper 32 undergoes elastic bending.

[0056] The oil outlet seat 31 is driven to abut against the retracting resistance plate 310. With the help of the bending deformation resistance of the L-shaped elastic rod 311, the contact force between the retracting resistance plate 310 and the oil outlet seat 31 is increased, causing the rubber pad 312 between them to abut against the corresponding oil outlet micro-hole 37 and block it. This automatically realizes the single-sided processing of the forward side of the oil outlet seat 31, so that the elastic scraper plate 32 can effectively scrape the lubricating oil flowing down. By applying oil to the surface of the stamping die 15, the dynamic friction scratches between the metal frame sheet and the stamping die 15 during the stamping process are further reduced.

[0057] Example 3: Please refer to Figures 1-7 As shown, the present invention also proposes a method for using an anti-scratch positioning stamping forming mechanism for the metal frame of a powder packaging machine, comprising the following steps:

[0058] Step 1: The metal frame plate of the powder packaging machine is placed between the tops of the two sets of top blocks 41. The hydraulic cylinder 16 pushes the stamping column 24 down. Combined with the spring 25 and spring 26 inside the stamping column 24, the stamping rod 21 carries the stamping plate 13 to push the stamping punch 14 down. The stamping plate 13 first abuts against the lower pressure plate 42, pushing the top block 41 to compress the spring 43 and move down. This causes the metal frame plate to first fit against the stamping die 15, and then the stamping punch 14 abuts against the top of the metal frame plate.

[0059] At this time, the stamping rod 21 moves upward relative to the stamping column 24, and the top of the impact rod 22 abuts against the impact block 23, causing the spring 1 25 and the spring 2 26 to be compressed synchronously, so that the stamping punch 14 flexibly pre-presses the metal frame sheet, realizing the soft fit and pre-deformation of the metal frame sheet, avoiding the static extrusion indentation caused by rigid hard contact with elastic contact, and providing clamping and positioning treatment for the sheet during the second instantaneous impact stamping.

[0060] Step 2: The stamping plate 13 continues to descend, and the top of the impact rod 22 slides against the bottom spherical surface of the impact block 23, causing the top of the impact rod 22 to move into the impact hole 27 of the impact block 23. At this time, there is a relative movement gap between the impact rod 22 and the impact block 23. The compressive elastic potential energy of the spring 1 25 and the spring 2 26 is released rapidly, causing the impact block 23 to impact the impact rod 22 instantaneously. The instantaneous impact force is transmitted to the stamping punch 14 through the stamping rod 21, causing the stamping punch 14 to perform a second instantaneous high-speed impact stamping process on the metal frame sheet. The interaction time between the die and the sheet is extremely short, and there is almost no relative slippage between the sheet and the die. The instantaneous impact and the second fast stamping suppress dynamic friction scratches and release the stamping internal stress of the sheet immediately. Then, the stamping column 24 abuts against the stamping plate 13, and the stamping punch 14 performs three pressure-holding rigid re-pressing on the metal frame sheet, further eliminating springback, warping and deformation after stamping, and stabilizing the stamping forming accuracy.

[0061] Step 3: After stamping, the hydraulic cylinder 16 drives the stamping plate 13 and the stamping punch 14 to rise and reset. At the same time, the ejector block 41 rises and resets synchronously through the compression force of the spring 3 43, and pushes the stamped part to rise and be taken out from the stamping die 15. The electric push rod 17, combined with the U-shaped frame 33, pushes the oil storage box 34 to move towards the top of the stamping die 15.

[0062] During this process, the servo motor 36 first drives the oil storage box 34 to deflect, causing the elastic scraper 32 below it to deflect towards the rearward side of the oil storage box 34. After the elastic scraper 32 moves to the top of the mold cavity of the stamping die 15, the servo motor 36 drives the oil storage box 34 to reset and deflect. One side of the elastic scraper 32 abuts against the mold cavity of the stamping die 15, and the elastic scraper 32 undergoes elastic bending, which drives the oil outlet seat 31 to abut against the rearward resistance plate 310, so that the rubber pad 312 between the two abuts against the corresponding oil outlet microhole 37 and blocks it.

[0063] The conical oil outlet 35 undergoes a squeezing deformation, increasing the hydraulic pressure of the lubricating oil inside. This pushes the elastic plate 39 to block the oil outlet slit 38 at the bottom of the oil storage box 34 on one side. The lubricating oil inside the conical oil outlet 35 flows out from multiple oil outlet micro-holes 37 on the forward side of the oil outlet seat 31 and flows down along the elastic scraper 32 to contact the mold cavity of the stamping die 15.

[0064] During the continuous translation of the oil storage box 34, the servo motor 36 continuously drives the oil storage box 34 to deflect in a reset manner. By continuously increasing the bending deformation of the elastic scraper 32, the lubricating oil flows out continuously to perform preliminary oiling treatment on the stamping die 15. At the same time, the oil storage box 34 moves against the raised stamping part on the top of the ejector block 41 to assist in the automatic unloading of the stamping part.

[0065] Step 4: After the stamped part is automatically unloaded, the servo motor 36 first drives the oil storage box 34 to continuously deflect, causing the elastic scraper 32 to separate from the mold cavity of the stamping die 15. Combined with the deformation and rebound force of the elastic scraper 32, the conical oil outlet 35 and the L-shaped elastic rod 311, the elastic scraper 32, the conical oil outlet 35 and the L-shaped elastic rod 311 are automatically deformed and reset. The conical oil outlet 35 forms an expansion recovery. Because the diameter of the oil outlet micro-hole 37 is small, the negative pressure state inside cannot be quickly restored. The elastic plate 39 is automatically pushed to open the oil outlet slit 38, and oil is drawn from the oil storage box 34 to replenish it. During the process of the electric push rod 17 driving the oil storage box 34 to move and reset, the servo motor 36 drives the oil storage box 34 to deflect in the opposite direction again, and applies oil to the stamping die 15 a second time, further reducing the dynamic friction scratches between the metal frame sheet and the stamping die 15 during the stamping process.

[0066] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A scratch-resistant positioning stamping and forming mechanism for the metal frame of a powder packaging machine, comprising a base (1), wherein a top plate (12) is fixedly connected to the top of the base (1) by a plurality of guide pillars (11), characterized in that, A stamping plate (13) is slidably connected between the guide pillars (11). A stamping punch (14) and a stamping die (15) are respectively detachably installed on the bottom of the stamping plate (13) and the top of the base (1). The top of the stamping plate (13) is provided with a scratch-resistant stamping assembly (2) that performs flexible pre-pressing, instantaneous impact stamping, and subsequent pressure-holding rigid re-pressing on the metal frame. The scratch-resistant stamping assembly (2) includes a stamping rod (21), an impact rod (22), and an impact block (23). The base (1) is provided with an oil coating component (3) for coating the surface of the stamping die (15) with lubricating oil for secondary damage protection. The oil coating component (3) includes an oil outlet seat (31) and an elastic oil scraper (32) installed below the oil outlet seat (31). The base (1) is provided with a top material component (4) for self-unloading of metal frame stamping parts in cooperation with the oil coating component (3).

2. The anti-scratch positioning stamping forming mechanism for the metal frame of a powder packaging machine according to claim 1, characterized in that, A stamping column (24) is provided between the stamping plate (13) and the top plate (12) and is slidably connected to the guide support (11). A hydraulic cylinder (16) for pushing the stamping column (24) up and down is fixedly installed on the top plate (12). The stamping column (24) has an upper cavity and a lower cavity that are connected to each other. The stamping rod (21) is fixedly installed on the top of the stamping plate (13) and slidably connected to the stamping column (24). The top end of the stamping rod (21) extends into the lower cavity and is fixedly connected to a hemispherical block.

3. The anti-scratch positioning stamping forming mechanism for the metal frame of a powder packaging machine according to claim 2, characterized in that, The impact rod (22) is located in the lower cavity, and the top of the impact rod (22) extends into the upper cavity. The bottom of the impact rod (22) is fixedly connected to an abutment plate that moves against the hemispherical block. A spring (25) is fixedly connected between the top of the abutment plate and the top of the lower cavity. The impact block (23) is slidably connected in the upper cavity for the instantaneous impact of the impact rod (22).

4. The anti-scratch positioning stamping forming mechanism for the metal frame of a powder packaging machine according to claim 3, characterized in that, A spring (26) is fixedly connected between the top of the impact block (23) and the top of the upper cavity. The bottom of the impact block (23) has a spherical surface that abuts against the top of the impact rod (22), and the top of the spherical surface has an impact hole (27).

5. The anti-scratch positioning stamping forming mechanism for the metal frame of a powder packaging machine according to claim 1, characterized in that, An L-shaped support plate is fixedly connected to one side of the base (1), and a U-shaped frame (33) is installed on the L-shaped support plate by an electric push rod (17). An oil storage box (34) is rotatably installed inside the U-shaped frame (33), and a conical oil outlet bladder (35) communicating with the oil outlet seat (31) is fixedly connected to the bottom of the oil storage box (34).

6. The anti-scratch positioning stamping forming mechanism for the metal frame of a powder packaging machine according to claim 5, characterized in that, The U-shaped frame (33) is fixedly connected to a support rod that is slidably connected to the L-shaped support plate, and a servo motor (36) for driving the oil storage box (34) to deflect.

7. The anti-scratch positioning stamping forming mechanism for the metal frame of a powder packaging machine according to claim 5, characterized in that, Multiple oil outlet microholes (37) are equidistantly opened on the inner walls of both sides of the oil outlet seat (31) along its length direction. An oil outlet slit (38) is opened through the bottom of the oil storage box (34). An elastic plate (39) for resisting the oil outlet slit (38) is fixedly connected to one side of the bottom of the oil storage box (34).

8. The anti-scratch positioning stamping forming mechanism for the metal frame of a powder packaging machine according to claim 7, characterized in that, Both sides of the oil outlet seat (31) are provided with resistance plates (310), and multiple L-shaped elastic rods (311) are fixedly connected between the resistance plates (310) and the bottom of the oil storage box (34). A rubber pad (312) that blocks the corresponding oil outlet microhole (37) and is inclined is fixedly connected between the oil outlet seat (31) and the resistance plate (310).

9. The anti-scratch positioning stamping forming mechanism for the metal frame of a powder packaging machine according to claim 1, characterized in that, The ejector assembly (4) includes ejector blocks (41) located on both sides of the stamping die (15), and a lower pressure plate (42) that cooperates with the stamping plate (13) is fixedly connected to the ejector block (41). A spring three (43) is fixedly connected between the ejector block (41) and the base (1). A movable seat (44) that is slidably connected to the base (1) is fixedly connected to the bottom of the ejector block (41).

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