A multi-microporous self-lubricating punching die

Abstract

A multi-microporous self-lubricating punching die relates to the technical field of stamping dies, and includes an upper die, a lower die, a guide sleeve, and a lubricating oil regulating system. The upper die includes an adjusting screw, a positioning pin, an elastomer, a stripping plate, an upper die plate, a pad, a punch needle, and a punch needle fixing plate. The lower die includes a die fixing screw, a die, a lower die plate, and a positioning cone pin. The guide sleeve includes a guide column and a guide sleeve. The lubricating oil regulating system includes a pressure regulating oil circuit, an oil supply oil circuit, and an oil unloading oil circuit. The pressure regulating one-way valve includes a pressure regulating steel ball and a pressure regulating reset spring. The oil supply one-way valve is arranged on the oil supply oil circuit, and the oil supply one-way valve includes an oil supply steel ball, an oil supply reset spring, and an oil supply adjustment screw, and an oil unloading plug wire is arranged on the oil unloading oil circuit. The present invention adds a self-lubricating system, which can automatically lubricate the punch and the die during operation, thereby reducing the wear and breakage damage rate of the punch and the die, improving the punching quality, increasing the service life of the die, and improving production efficiency.

Description

Technical Field

[0001] The invention relates to the technical field of punching dies, in particular to a multi-microporous self-lubricating punching die. Background Art

[0002] Multi-micropore punching is mostly used in sound insulation and noise reduction panels, environmental protection equipment filter panels, decorative panels and other fields. The production process of similar products on the market is mainly due to the fact that the mold does not have a self-lubricating function, the punching quality is poor, the punch breakage rate is high, the die wears quickly, the punching processing quality is poor, and the mold production efficiency is low. Summary of the invention

[0003] In order to overcome the shortcomings of the above-mentioned prior art, the purpose of the present invention is to provide a multi-microporous self-lubricating punching die, which has an added self-lubricating system, which can automatically lubricate the punch needle and the die during operation, thereby reducing the wear and breakage rate of the punch needle and the die, improving the punching quality, increasing the service life of the die, and improving production efficiency.

[0004] In order to solve the above problems, the present invention adopts the following technical solution: a multi-microporous self-lubricating punching die, characterized in that it includes an upper die, a lower die, a guide sleeve, and a lubricating oil regulating system.

[0005] The upper die includes an adjusting screw, a positioning pin, an elastic body, a stripper plate, an upper die plate, a backing plate, a punching needle, and a punching needle fixing plate.

[0006] A pad is provided between the punch needle fixing plate and the upper template, the punch needle fixing plate, the upper template and the pad are connected together by a positioning pin, a mounting hole is provided on the upper end surface of the punch needle fixing plate, the punch needle is arranged on the punch needle fixing plate, a groove is provided on the outer periphery of the lower end surface of the punch needle fixing plate, an elastic body is arranged in the groove, the lower end surface of the elastic body is arranged in the groove on the plane of the stripping plate, the stripping plate is connected to the upper template by an adjusting screw, a punch needle guide hole is provided on the stripping plate, and a closed oil chamber for storing lubricating oil is surrounded by the elastic body between the punch needle fixing plate and the stripping plate.

[0007] The lower die includes a die fixing screw, a die, a lower die plate, and a positioning cone pin.

[0008] The concave die is arranged above the lower die plate, and the concave die and the lower die plate are connected together by the concave die fixing screws and the positioning cone pins, and the concave die is provided with a discharge hole.

[0009] The guide sleeve comprises a guide post and a guide sleeve. The upper die and the lower die are connected together by the guide sleeve arranged on the upper die plate and the lower die plate so as to be relatively slidable.

[0010] The lubricating oil regulating system includes a pressure regulating oil circuit, an oil replenishing oil circuit and an oil unloading oil circuit. The pressure regulating oil circuit is arranged on the punch needle fixing plate, one end of the pressure regulating oil circuit is connected to the oil chamber, and the other end of the pressure regulating oil circuit is connected to the external oil tank through a pressure regulating one-way valve, an oil pipe, a three-way connection, and a shut-off valve. The oil replenishing oil circuit is arranged on the material stripping plate, one end of the oil replenishing oil circuit is connected to the oil chamber through an oil replenishing one-way valve, and the other end of the oil replenishing oil circuit is connected to the external oil tank through an oil pipe, a three-way connection, and a shut-off valve. The oil unloading oil circuit is arranged on the material stripping plate, one end of the oil unloading oil circuit is connected to the oil chamber, and the other end of the oil unloading oil circuit is connected to the outside of the mold through an oil unloading plugging wire.

[0011] The pressure-regulating one-way valve comprises a pressure-regulating steel ball and a pressure-regulating return spring. The pressure-adjusting screw is arranged on the punch needle fixing plate. The end of the pressure-adjusting screw abuts against the end of the pressure-regulating return spring. When the oil chamber is under normal pressure, the pressure-regulating return spring abuts against the pressure-regulating steel ball. At this time, the pressure-regulating steel ball closes the oil path between the oil tank and the oil chamber. When the oil chamber is squeezed, the pressure in the oil chamber increases. Under the action of pressure, the lubricating oil lubricates the front end of the punch needle through the clearance of the stripping plate. At the same time, the pressure-regulating steel ball is pushed outward, and the pressure-regulating return spring is compressed. At this time, the pressure-regulating steel ball connects the pressure-regulating oil path between the oil tank and the oil chamber, and the excess lubricating oil returns to the oil tank. Otherwise, the pressure-regulating oil path is closed.

[0012] The oil replenishment one-way valve is arranged on the oil replenishment oil circuit, the oil replenishment one-way valve comprises an oil replenishment steel ball, an oil replenishment return spring, and an oil replenishment adjusting screw. The oil replenishment adjusting screw is arranged on the stripping plate, and a through hole is provided in the middle of the oil replenishment adjusting screw, and the end portion of the oil replenishment adjusting screw abuts against the end portion of the oil replenishment return spring. Under normal pressure in the oil chamber, the oil replenishment return spring abuts against the oil replenishment steel ball. At this time, the oil replenishment steel ball closes the oil circuit between the oil tank and the oil chamber. When the oil chamber is squeezed, the pressure in the oil chamber increases, and the oil replenishment steel ball presses against the end face of the oil circuit hole under the action of the dual pressure of the lubricating oil and the oil replenishment return spring, and the oil circuit is closed; conversely, during the return stroke, the inner volume of the oil chamber increases to form a negative pressure. Under the action of the negative pressure, the oil replenishment steel ball overcomes the elastic force of the oil replenishment return spring and pushes upward, and the oil replenishment return spring is compressed. At this time, the oil replenishment steel ball connects the oil circuit between the oil tank and the oil chamber for oil replenishment.

[0013] Further: a guide spring is provided on the guide column between the upper template and the lower template.

[0014] Furthermore: a concave die discharge support guide block is provided on the lower template, and the upper end of the concave die discharge support guide block abuts against the concave die.

[0015] Further: the upper end surface of the lower template is a concave surface with a high middle and low sides.

[0016] Furthermore: an O-ring is provided in the mounting hole.

[0017] Further: the groove is a rectangle surrounding the outer circumference of the lower end surface of the punching needle fixing plate.

[0018] The beneficial effects of the present invention are:

[0019] 1. It adds a self-lubricating system, which can automatically lubricate the punch needle and die during work, thereby reducing the wear and breakage rate of the punch needle and die, reducing the number of times the punch needle needs to be replaced, reducing punching burrs, improving punching quality and efficiency, increasing the service life of the mold, and improving production efficiency.

[0020] 2. Due to the full lubrication of the punch needle, the die of the mold is also lubricated, which reduces the wear of the die and increases the service life of the die.

[0021] 3. A concave die discharge support guide block is provided between the concave die and the lower die plate, and the concave die discharge support guide block can well support the concave die, making it convenient for the concave die to discharge the punched material.

[0022] 4. The upper end surface of the lower template is a concave surface with a high middle and low sides. When the punched material falls onto the lower template, it will automatically slide to the outside of the mold for timely collection.

[0023] 5. The pressure adjustment screw is arranged on the punch needle fixing plate, and the end of the pressure adjustment screw is against the end of the reset spring. By adjusting the pressure adjustment screw, the pressure of the reset spring is adjusted, thereby adjusting the pressure of the lubricating oil.

[0024] 6. This type of mold usually has 90 punching needles in each row, 15 rows, and a total of 1,350 punching needles. Before the invention was used, the needle breakage rate would appear every day. After the invention was used, the needle breakage rate was greatly reduced to the same level of breakage every two weeks. Since it is difficult to replace the punching needle, replacing the punching needle increases the auxiliary group working hours a lot. After using the present invention, the number of replacements is reduced, and the productivity and punching quality are greatly improved.

[0025] 7. The oil discharge circuit is used to discharge the lubricating oil in the lubricating oil storage chamber to the outside of the mold oil chamber for collection and reuse when replacing the punch needle, which is convenient for replacing the punch needle, reducing oil consumption pollution and protecting the environment. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The present invention will be further described below in conjunction with the accompanying drawings and embodiments:

[0027] Figure 1 It is a schematic diagram of the structure of the present invention;

[0028] Figure 2 yes Figure 1 A magnified view of middle;

[0029] Figure 3 yes Figure 1 Enlarged view of middle B;

[0030] Figure 4 yes Figure 1 Enlarged view of middle C;

[0031] In the figure: 1 guide column, 2 guide sleeve, 3 adjustment screw, 4 positioning pin, 5 elastic body, 6 stripper plate, 61 punch needle guide hole, 7 pressure regulating oil circuit, 8 upper template, 9 pad, 10 punch needle, 11 punch needle fixing plate, 12 O-ring, 13 pressure regulating one-way valve, 14 oil pipe, 15 die fixing screw, 16 die, 161 discharge hole, 17 die discharge support guide block, 18 lower template, 19 guide spring, 20 positioning cone pin, 21 pressure regulating reset spring, 22 pressure regulating steel ball, 23 pressure adjusting screw, 24 sheet, 25 oil cavity, 26 oil replenishing one-way valve, 27 oil unloading oil circuit, 28 oil unloading blocking wire, 29 oil replenishing oil circuit, 30 oil replenishing steel ball, 31 oil replenishing reset spring, 32 oil replenishing adjustment screw, 34 tee, 35 stop valve. DETAILED DESCRIPTION

[0032] like Figure 1 , Figure 2 , Figure 3 , Figure 4 As shown, a multi-microporous self-lubricating punching die includes an upper die, a lower die, a guide sleeve, and a lubricating oil regulating system.

[0033] The upper die comprises an adjusting screw 3 , a positioning pin 4 , an elastic body 5 , a stripping plate 6 , an upper die plate 8 , a backing plate 9 , a punching needle 10 , and a punching needle fixing plate 11 .

[0034] A pad 9 is provided between the punch needle fixing plate 11 and the upper template 8. The punch needle fixing plate 11, the upper template 8 and the pad 9 are connected together by a positioning pin 4. A mounting hole is provided on the upper end surface of the punch needle fixing plate 11. The punch needle 10 is arranged on the punch needle fixing plate 11. A groove is provided on the outer periphery of the lower end surface of the punch needle fixing plate 11. An elastomer 5 is arranged in the groove. The lower end surface of the elastomer 5 is arranged in the groove on the plane of the stripping plate 6. The stripping plate 6 is connected to the upper template 8 by an adjusting screw 3. A punch needle guide hole 61 is provided on the stripping plate 6. A closed oil chamber 25 for storing lubricating oil is surrounded by the elastomer 5 between the punch needle fixing plate 11 and the stripping plate 6.

[0035] The lower die comprises a die fixing screw 15 , a die 16 , a lower die plate 18 , and a positioning cone pin 20 .

[0036] The concave die 16 is arranged above the lower die plate 18 . The concave die 16 and the lower die plate 18 are connected together via a concave die fixing screw 15 and a positioning cone pin 20 . A discharge hole 161 is arranged on the concave die 16 .

[0037] The guide sleeve comprises a guide column 1 and a guide sleeve 2, and the upper die and the lower die are connected together by a guide sleeve arranged on the upper die plate 8 and the lower die plate 18 so as to be relatively slidable.

[0038] The lubricating oil regulating system includes a pressure regulating oil circuit 7, an oil replenishing oil circuit 29 and an oil unloading oil circuit 27. The pressure regulating oil circuit 7 is arranged on the punch needle fixing plate 11, one end of the pressure regulating oil circuit 7 is connected to the oil chamber 25, and the other end of the pressure regulating oil circuit 7 is connected to the external oil tank through the pressure regulating one-way valve 13, the oil pipe 14, the three-way valve 34, and the shut-off valve 35. The oil replenishing oil circuit 29 is arranged on the stripping plate 6, one end of the oil replenishing oil circuit 29 is connected to the oil chamber 25 through the oil replenishing one-way valve 26, and the other end of the oil replenishing oil circuit 29 is connected to the external oil tank through the oil pipe, the three-way valve 34, and the shut-off valve 35. The oil unloading oil circuit 27 is arranged on the stripping plate 6, one end of the oil unloading oil circuit 27 is connected to the oil chamber 25, and the other end of the oil unloading oil circuit 27 is connected to the outside through the oil unloading plugging wire 28.

[0039] The pressure-regulating one-way valve 13 comprises a pressure-regulating steel ball 22 and a pressure-regulating reset spring 21. The pressure adjusting screw 23 is arranged on the punch needle fixing plate 11. The end of the pressure adjusting screw 23 abuts against the end of the pressure-regulating reset spring 21. When the oil chamber 25 is under normal pressure, the pressure-regulating reset spring 21 abuts against the pressure-regulating steel ball 22. At this time, the pressure-regulating steel ball 22 closes the oil circuit between the oil tank and the oil chamber 25. When the oil chamber 25 is squeezed, the pressure in the oil chamber 25 increases. Under the action of pressure, the lubricating oil lubricates the front end of the punch needle 10 through the gap of the stripping plate 6; at the same time, the pressure-regulating steel ball 33 is pushed outward, and the pressure-regulating reset spring 21 is compressed. At this time, the pressure-regulating steel ball 22 connects the pressure-regulating oil circuit 7 between the oil tank and the oil chamber 25, and the excess lubricating oil returns to the oil tank. Otherwise, the pressure-regulating oil circuit 7 is closed.

[0040] The oil replenishment check valve 26 is arranged on the oil replenishment oil circuit 29. The oil replenishment check valve 26 includes an oil replenishment steel ball 30, an oil replenishment return spring 31, and an oil replenishment adjustment screw 32. The oil replenishment adjustment screw 32 is arranged on the stripper plate 6. There is a through hole in the middle of the oil replenishment adjustment screw 32. The end of the oil replenishment adjustment screw 32 abuts against the end of the oil replenishment return spring 31. When the oil chamber 25 is under normal pressure, the oil replenishment return spring 31 abuts against the oil replenishment steel ball 30. At this time, the oil replenishment steel ball 30 is between the oil tank and the oil chamber 25. The oil circuit is closed. When the oil chamber 25 is squeezed, the pressure in the oil chamber 25 increases. The oil-replenishing steel ball 30 is sealed against the end face of the oil circuit hole under the dual pressure of the lubricating oil and the oil-replenishing return spring 31. Conversely, during the return stroke, the inner volume of the oil chamber 25 increases to form a negative pressure. Under the action of the negative pressure, the oil-replenishing steel ball 30 overcomes the elastic force of the oil-replenishing return spring 31 and pushes upward. The oil-replenishing return spring 31 is compressed. At this time, the oil-replenishing steel ball 30 connects the oil circuit between the oil tank and the oil chamber 25 for oil replenishment.

[0041] A guide spring 19 is provided on the guide column 1 between the upper die plate 8 and the lower die plate 18. A die discharge support guide block 17 is provided between the die 16 and the lower die plate 18. The upper end surface of the lower die plate 18 is a concave surface with a high middle and low sides. An O-ring 12 is provided in the mounting hole. The groove is a rectangle surrounding the outer periphery of the lower end surface of the punch pin fixing plate 11.

[0042] When the stamping is working, the upper die descends and the stripper plate 6 presses the sheet 24, the elastomer 5 is compressed, the space of the closed oil chamber 25 for storing the lubricating oil is reduced, the pressure in the oil chamber 25 increases, and the lubricating oil is pressurized and flows downward along the gap between the punch needle 10 and the stripper plate 6 to lubricate the front end of the punch needle 10. At the same time, the steel ball 22 is pushed outward, and the oil chamber 25 is connected to the external oil tank through the oil pipe 14, the tee 34, and the shut-off valve 35 to realize the overflow of excess lubricating oil back to the oil tank. The lubrication effect of the punch needle 10 can be adjusted by adjusting the pressure of the reset spring 21 by adjusting the pressure adjusting screw 23, thereby realizing the adjustment of the opening and closing pressure of the steel ball 22 and the pressure adjustment of the lubricating oil. After the stamping is completed, the upper die moves upward. At this time, the elastomer 5 is no longer compressed, and the pressure in the oil chamber 25 returns to normal, and a negative pressure is formed in the oil chamber 25. At this time, the return spring 21 pushes the steel ball 22 to the left. At this time, the steel ball 22 closes the oil path 7 between the oil tank and the oil chamber 25. The oil-replenishing steel ball 30 overcomes the elastic force of the oil-replenishing return spring 31 under the action of the negative pressure and pushes upward. The oil-replenishing return spring 31 is compressed. At this time, the oil-replenishing steel ball 30 connects the oil path between the oil tank and the oil chamber 25 to replenish the oil in the oil chamber 25.

[0043] The present invention is not limited only to the above-described embodiments.

Claims

1. A multi-microporous self-lubricating punching die, characterized in that: Including upper die, lower die, guide sleeve, lubricating oil regulating system, The upper die includes an adjusting screw, a positioning pin, an elastic body, a stripper plate, an upper die plate, a backing plate, a punching needle, and a punching needle fixing plate. A pad is provided between the punch needle fixing plate and the upper template, the punch needle fixing plate, the upper template and the pad are connected together by a positioning pin, a mounting hole is provided on the upper end surface of the punch needle fixing plate, the punch needle is arranged on the punch needle fixing plate, a groove is provided on the outer periphery of the lower end surface of the punch needle fixing plate, an elastic body is arranged in the groove, the lower end surface of the elastic body is arranged in the groove on the plane of the stripping plate, the stripping plate is connected to the upper template by an adjusting screw, a punch needle guide hole is provided on the stripping plate, and a closed oil chamber for storing lubricating oil is surrounded by the elastic body between the punch needle fixing plate and the stripping plate. The lower die includes a die fixing screw, a die, a lower die plate, and a positioning cone pin. The concave die is arranged above the lower die plate, and the concave die and the lower die plate are connected together by the concave die fixing screws and the positioning cone pins, and the concave die is provided with a discharge hole. The guide sleeve comprises a guide post and a guide sleeve. The upper die and the lower die are connected together by the guide sleeve arranged on the upper die plate and the lower die plate so as to be relatively slidable. The lubricating oil regulating system includes a pressure regulating oil circuit, an oil replenishing oil circuit and an oil unloading oil circuit. The pressure regulating oil circuit is arranged on the punch needle fixing plate, one end of the pressure regulating oil circuit is connected to the oil chamber, and the other end of the pressure regulating oil circuit is connected to the external oil tank through a pressure regulating one-way valve, an oil pipe, a three-way connection, and a shut-off valve. The oil replenishing oil circuit is arranged on the material stripping plate, one end of the oil replenishing oil circuit is connected to the oil chamber through an oil replenishing one-way valve, and the other end of the oil replenishing oil circuit is connected to the external oil tank through an oil pipe three-way connection and a shut-off valve. The oil unloading oil circuit is arranged on the material stripping plate, one end of the oil unloading oil circuit is connected to the oil chamber, and the other end of the oil unloading oil circuit is connected to the outside of the mold through an oil unloading plugging wire. The pressure-regulating one-way valve comprises a pressure-regulating steel ball and a pressure-regulating return spring. The pressure-adjusting screw is arranged on the punch needle fixing plate. The end of the pressure-adjusting screw abuts against the end of the pressure-regulating return spring. When the oil chamber is under normal pressure, the pressure-regulating return spring abuts against the pressure-regulating steel ball. At this time, the pressure-regulating steel ball closes the oil path between the oil tank and the oil chamber. When the oil chamber is squeezed, the pressure in the oil chamber increases. Under the action of pressure, the lubricating oil lubricates the front end of the punch needle through the clearance of the stripping plate. At the same time, the pressure-regulating steel ball is pushed outward, and the pressure-regulating return spring is compressed. At this time, the pressure-regulating steel ball connects the pressure-regulating oil path between the oil tank and the oil chamber, and the excess lubricating oil returns to the oil tank. Otherwise, the pressure-regulating oil path is closed. The oil replenishment one-way valve is arranged on the oil replenishment oil circuit, the oil replenishment one-way valve comprises an oil replenishment steel ball, an oil replenishment return spring, and an oil replenishment adjusting screw. The oil replenishment adjusting screw is arranged on the stripping plate, and a through hole is provided in the middle of the oil replenishment adjusting screw, and the end portion of the oil replenishment adjusting screw abuts against the end portion of the oil replenishment return spring. Under normal pressure in the oil chamber, the oil replenishment return spring abuts against the oil replenishment steel ball. At this time, the oil replenishment steel ball closes the oil circuit between the oil tank and the oil chamber. When the oil chamber is squeezed, the pressure in the oil chamber increases, and the oil replenishment steel ball presses against the end face of the oil circuit hole under the action of the dual pressure of the lubricating oil and the oil replenishment return spring, and the oil circuit is closed; conversely, during the return stroke, the inner volume of the oil chamber increases to form a negative pressure. Under the action of the negative pressure, the oil replenishment steel ball overcomes the elastic force of the oil replenishment return spring and pushes upward, and the oil replenishment return spring is compressed. At this time, the oil replenishment steel ball connects the oil circuit between the oil tank and the oil chamber for oil replenishment.

2. The multi-microporous self-lubricating punching die according to claim 1, characterized in that: A guide spring is arranged on the guide column between the upper template and the lower template.

3. A multi-microporous self-lubricating punching die according to claim 1 or 2, characterized in that: The lower mold plate is provided with a concave die discharge support guide block, and the upper end portion of the concave die discharge support guide block abuts against the concave die.

4. The multi-microporous self-lubricating punching die according to claim 3, characterized in that: The upper end surface of the lower template is a concave surface with a high middle and low sides.

5. The multi-microporous self-lubricating punching die according to claim 3, characterized in that: An O-ring is arranged in the mounting hole.

6. The multi-microporous self-lubricating punching die according to claim 3, characterized in that: The groove is a rectangle surrounding the outer periphery of the lower end surface of the punch pin fixing plate.

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