Cooling and lubricating system and method for metal stamping die

Abstract

The invention discloses a cooling and lubricating system and method for a metal stamping die. The cooling and lubricating system comprises an upper die base and a lower die base. A male die is arranged at the bottom of the upper die base. A cavity is formed in the surface of the lower die base, and a liquid storage box is further arranged on the surface of the lower die base. A drainage mechanism is arranged between the liquid storage box and the cavity; the drainage mechanism is arranged in the lower die base in a relatively sliding mode. An ejection mechanism is further arranged in the lower die base. A lower pressing column is arranged at the bottom of the upper die base; a flow channel communicated with the drainage mechanism is arranged in the lower pressing column; a nozzle is formed in one side of the lower pressing column; and the nozzle is connected with the runner. The relative lifting process of the upper die is reasonably utilized, and before the upper die descends for punching, the lower pressing column can drive the drainage mechanism to descend synchronously with the upper die; the liquid storage box can be opened along with descending of the drainage mechanism, so that lubricating oil in the liquid storage box can enter a liquid collecting cavity of the drainage mechanism, and the ejector rod can be inserted into the liquid collecting cavity along with continuous descending of the drainage mechanism and pushes the ejector plate upwards.

Description

Technical Field

[0001] This invention relates to a cooling and lubrication system, specifically to a cooling and lubrication system and method for a metal stamping die, belonging to the technical field of stamping equipment. Background Technology

[0002] In existing metal stamping processes, the direct contact between the metal sheet and the die surface generates intense friction. Lubricant forms a protective film at the contact surface, reducing the coefficient of friction and minimizing die wear. Simultaneously, during high-speed stamping, the plastic deformation and friction of the metal generate a significant amount of heat. Coolant absorbs and carries away this heat through its flow, preventing the die and workpiece from deforming or losing hardness due to overheating. Therefore, in metal stamping, cooling lubricant plays a crucial role in reducing friction and thermal stress, preventing scratches, burrs, and deformation, ensuring surface finish and dimensional accuracy, and allowing for higher stamping speeds and continuous operation, minimizing downtime for cleaning or die replacement.

[0003] In existing technologies, the common method is to manually apply cooling and lubricating oil to the mold surface to reduce punch temperature, decrease product burrs, and achieve a lubricating effect. However, manual application poses safety hazards. To address these issues, some existing stamping equipment has specifically designed various automatic oil dispensing mechanisms. For example, Chinese Patent Document CN209773254U discloses a cooling and lubrication device for an internal stamping die. The drawback of this patent is that it uses wool felt strips to absorb lubricating oil, then contacts the punch with it, applying the oil to the punch using the felt strips. While this method eliminates the need for manual application, the movement of the felt strips still requires manual intervention. Another example is the automatic lubrication and cooling mechanism for a stamping punch disclosed in Chinese Patent Document CN104475588B. This patent requires a complex oil circuit within the lower die to introduce lubricating oil into the cavity. Furthermore, this method requires a large volume of oil to cover the cavity and workpiece surface from bottom to top; insufficient oil makes it difficult to cover the workpiece surface. Therefore, further improvements are needed. Summary of the Invention

[0004] The purpose of this invention is to overcome the above-mentioned technical deficiencies and propose a cooling and lubrication system and method for metal stamping dies. The system has a simple and reasonable structure, high safety and stability, wide lubricant coverage, and is easy to operate and replace.

[0005] The technical solution adopted in this invention is as follows: a cooling and lubrication system for a metal stamping die, comprising an upper die base and a lower die base; a punch is provided at the bottom of the upper die base; a cavity is provided on the surface of the lower die base, and a liquid storage box is also provided on the surface of the lower die base; a flow guiding mechanism is provided between the liquid storage box and the cavity; the flow guiding mechanism is relatively slidably disposed within the lower die base; an ejection mechanism is also provided within the lower die base; a downward pressure column is provided at the bottom of the upper die base; a flow channel communicating with the flow guiding mechanism is provided within the downward pressure column; a nozzle is provided on one side of the downward pressure column; the nozzle is connected to the flow channel.

[0006] Furthermore, the surface of the lower mold base is provided with a trapezoidal liquid outlet relative to the liquid storage box; the drainage mechanism includes a drainage column; a drainage pipe is provided on one side of the drainage column; the lower mold base is provided with a moving inner cavity relative to the drainage column and the drainage pipe.

[0007] Furthermore, a side baffle is provided inside the moving inner cavity; the side baffle is provided with a slot for the drainage tube to move; a liquid guide plate is provided at the upper end of the drainage tube; the drainage tube is bent.

[0008] Furthermore, the surface of the liquid guiding plate is provided with a plug; the plug has the same outline and size as the trapezoidal liquid outlet; the liquid guiding plate is inverted trapezoidal, and its bottom is connected to the drainage pipe.

[0009] Furthermore, the drainage column is provided with a liquid collection chamber; the lower end of the drainage tube is connected to the liquid collection chamber; a top plate is provided in the liquid collection chamber; a through hole is provided at the bottom of the liquid collection chamber; and a liquid outlet channel is provided at the upper part of the liquid collection chamber.

[0010] Furthermore, the ejection mechanism includes a push rod disposed at the bottom of the inner side of the moving inner cavity; the push rod passes through the through hole and contacts the ejection plate; a protrusion is provided on the outer side of the drainage column.

[0011] Furthermore, guide grooves are provided on the inner wall and side baffles of the moving inner cavity relative to the protrusions; the protrusions are slidably connected in the guide grooves; and springs that connect with the protrusions are provided in the guide grooves.

[0012] Furthermore, the flow channel and the liquid outlet channel are arranged opposite to each other; during the descent of the upper mold base, the pressure column pushes the flow guide column downward; and rubber sleeves are respectively provided at the joint of the flow channel and the liquid outlet channel.

[0013] Furthermore, the bottom of the pressure column has an inlet communicating with the flow channel; the nozzle is located on the side of the pressure column facing the punch and the cavity.

[0014] Furthermore, the liquid storage box is connected to the oil cup via an oil pipe and a pump body.

[0015] A method for cooling and lubricating a metal stamping die includes the following steps:

[0016] Step 1: Place the metal workpiece in the mold cavity to be stamped; and turn on the pump to add cooling lubricating oil into the reservoir.

[0017] Step two: After the cooling and lubricating oil has been added, start the stamping die to lower the upper die holder;

[0018] Step 3: During the descent of the upper die base, before the punch contacts the metal workpiece, the pressure column will contact the flow column first and drive it to press down; after the pressure column contacts the flow column, their respective flow channels and liquid outlet channels will align and connect.

[0019] Step four: The descent of the drainage column will open the trapezoidal outlet at the bottom of the liquid storage box, allowing the cooling lubricating oil to enter the liquid collection chamber inside the drainage column;

[0020] Step 5: As the drainage column continues to descend, the push rod will insert into the through hole and push the ejector plate upward, reducing the internal space of the liquid collection chamber. This causes the cooling lubricating oil to generate pressure in the flow channel and the liquid outlet channel, and then spray it outward from the nozzle.

[0021] This invention offers the following advantages: By rationally utilizing the relative lifting and lowering process of the upper mold, before the upper mold descends for stamping, its lower pressure column drives the flow guiding mechanism to descend synchronously. As the flow guiding mechanism descends, it opens the liquid storage box, allowing the lubricating oil in the box to enter the liquid collection chamber of the flow guiding mechanism. As the flow guiding mechanism continues to descend, the ejector rod inserts into it and pushes the ejector plate upwards. The upward movement of the ejector plate reduces the internal space of the liquid collection chamber, causing the lubricating oil to move upwards and enter the flow channel. Since the liquid outlet channel in the lower pressure column is connected to the flow channel at this time, the lubricating oil can enter the liquid outlet channel from the flow channel and finally be sprayed onto the workpiece surface through the nozzle under high pressure. Using this design, the addition of cooling lubricating oil can be automatically completed during each mold closing process, eliminating the need for manual application.

[0022] Meanwhile, since the nozzle is located inside the lower pressure column and the workpiece is necessarily higher than the cavity of the lower die, the lubricating oil at the nozzle can be directly sprayed onto the surface of the workpiece, ensuring that the direct contact surface between the punch and the workpiece has sufficient cooling lubricating oil, thus ensuring the heat dissipation and cooling effect. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the structure of the present invention.

[0024] Figure 2 This is a schematic diagram of the drainage mechanism.

[0025] Figure 3This is a schematic diagram of the ejection mechanism.

[0026] Figure 4 This is a schematic diagram of the internal structure of the pressure column.

[0027] Wherein: 1 is the upper mold base, 2 is the lower mold base, 2-1 is the trapezoidal liquid outlet, 3 is the punch, 4 is the cavity, 5 is the liquid storage box, 6 is the pressure column, 6-1 is the flow channel, 6-2 is the nozzle, 7 is the guide column, 8 is the guide pipe, 9 is the moving inner cavity, 10 is the side baffle, 11 is the liquid guide plate, 12 is the plug, 13 is the liquid collection cavity, 14 is the ejector plate, 15 is the liquid outlet channel, 16 is the ejector rod, 17 is the protrusion, and 18 is the through hole. Detailed Implementation

[0028] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0029] See Figures 1-4 This application discloses a cooling and lubrication system for a metal stamping die, including an upper die base 1 and a lower die base 2; a punch 3 is provided at the bottom of the upper die base 1; a cavity 4 is provided on the surface of the lower die base 2, and a liquid storage box 5 is also provided on the surface of the lower die base 2; a flow guiding mechanism is provided between the liquid storage box 5 and the cavity 4; the flow guiding mechanism is relatively slidably disposed in the lower die base 2; an ejection mechanism is also provided in the lower die base 2; a pressure column 6 is provided at the bottom of the upper die base 1; a flow channel 6-1 connected to the flow guiding mechanism is provided in the pressure column 6; a nozzle 6-2 is provided on one side of the pressure column 6; the nozzle 6-2 is connected to the flow channel 6-1.

[0030] Furthermore, the lower mold base 2 has a trapezoidal liquid outlet 2-1 on its surface relative to the liquid storage box 5; the drainage mechanism includes a drainage column 7; a drainage pipe 8 is provided on one side of the drainage column 7; and the lower mold base 2 has a moving inner cavity 9 relative to the drainage column 7 and the drainage pipe 8.

[0031] Furthermore, the moving inner cavity 9 is provided with a side baffle 10; the side baffle 10 is provided with a slot for the drainage tube 8 to move; the upper end of the drainage tube 8 is provided with a liquid guiding plate 11; the drainage tube 8 is bent.

[0032] Furthermore, the surface of the liquid guiding plate 11 is provided with a plug 12; the plug 12 has the same outline and size as the trapezoidal liquid outlet 2-1; the liquid guiding plate 11 is inverted trapezoidal, and its bottom is connected to the drainage pipe 8.

[0033] Furthermore, the drainage column 7 is provided with a liquid collection chamber 13; the lower end of the drainage tube 8 is connected to the liquid collection chamber 13; the liquid collection chamber 13 is provided with a top plate 14; the bottom of the liquid collection chamber 13 is provided with a through hole 18; and the upper part of the liquid collection chamber 13 is provided with a liquid outlet channel 15.

[0034] Furthermore, the ejection mechanism includes a push rod 16 disposed at the bottom of the inner side of the moving inner cavity 9; the push rod 16 passes through the through hole 18 and contacts the ejection plate 14; a protrusion 17 is provided on the outer side of the drainage column 7.

[0035] Furthermore, the inner wall of the moving inner cavity 9 and the side baffle 10 are provided with guide grooves opposite to the protrusion 17; the protrusion 17 is slidably connected in the guide groove; and a spring connected to the protrusion 17 is provided in the guide groove.

[0036] Specifically, during the descent of the guide column 7, it overcomes the force of the spring. When the upper mold base rises and the lower pressure column rises, the spring will drive the guide column 7 to move upward. When the lower pressure column contacts the guide column 7, since the position of the lower pressure column is higher than the position of the workpiece, the nozzle can spray lubricating oil onto the workpiece from top to bottom.

[0037] Furthermore, the flow channel 6-1 is arranged opposite to the liquid outlet channel 15; the downward pressure column 6 pushes the flow guide column 7 downward during the descent of the upper mold base 1; and rubber sleeves are respectively provided at the docking points of the flow channel 6-1 and the liquid outlet channel 15.

[0038] Furthermore, the bottom of the pressure column 6 has an inlet that communicates with the flow channel 6-1; the nozzle 6-2 is located on the side of the pressure column 6 facing the punch 3 and the cavity 4.

[0039] Specifically, the inner diameters of the flow channel 6-1 and the liquid storage channel 15 are much smaller than the inner diameter of the liquid collection chamber 13; therefore, when the internal space of the liquid collection chamber 13 decreases, a greater pressure will be generated in the flow channel 6-1 and the liquid storage channel 15, enabling the lubricating oil to have spray pressure.

[0040] Furthermore, the liquid storage box 5 is connected to the oil cup via an oil pipe and a pump body.

[0041] Includes the following steps:

[0042] Step 1: Place the metal workpiece in cavity 4 to be stamped; and turn on the pump to add cooling lubricating oil into the reservoir 5.

[0043] Step 2: After the cooling and lubricating oil has been added, start the stamping die to lower the upper die holder 1.

[0044] Step 3: During the descent of the upper mold base 1, before the punch 3 contacts the metal workpiece, the pressure column 6 will contact the flow column 7 first and drive it to press down; after the pressure column 6 contacts the flow column 7, their respective flow channels 6-1 and liquid outlet channels 15 will be aligned and connected.

[0045] Step four: The descent of the drainage column 7 will open the trapezoidal outlet 2-1 at the bottom of the liquid storage box 5, allowing the cooling lubricating oil to enter the liquid collection chamber 13 inside the drainage column 7;

[0046] Step 5: As the drainage column 7 continues to descend, the push rod 16 will be inserted into the through hole 14 and push the ejector plate 14 upward, reducing the internal space of the liquid collection chamber 13, so that the cooling lubricating oil is pressurized in the flow channel 6-1 and the liquid outlet channel 15, and sprayed outward from the nozzle.

[0047] Working principle: As the downward pressure column 6 descends until it contacts the guide column 7, the punch 3 has not yet contacted the workpiece. However, the downward pressure column 6 can squeeze the guide column 7 downward, causing it to move downward. As the guide column 7 moves downward, the liquid guide plate 11 will also move downward under the drive of the guide pipe 8, causing the plug 12 on its surface to separate from the trapezoidal liquid storage port 2-1 at the bottom of the liquid storage box 5. The lubricating oil can then enter the guide plate 11 through the trapezoidal liquid storage port 2-1 and enter the liquid collection chamber 13 of the guide column 7 through the guide pipe 8. Simultaneously, during the descent of the guide column 7, the ejector rod 16 will pass through the through hole 14 and push the ejector plate 14 upward to reduce the internal space of the liquid collection chamber 13, allowing the lubricating oil to enter the flow channel 6-1. Furthermore, since the guide column 7 has already abutted against the lower pressure column 6, the flow channel 6-1 will also connect with the liquid outlet channel 15 at this time, allowing the lubricating oil to enter the liquid outlet channel 15 and be sprayed outward from the nozzle onto the surface of the workpiece between the contact between the punch and the workpiece.

[0048] The specific embodiments of the present invention described above do not constitute a limitation on the scope of protection of the present invention. Any other corresponding changes and modifications made in accordance with the technical concept of the present invention should be included within the scope of protection of the claims of the present invention.

Claims

1. A cooling and lubrication system for a metal stamping die, comprising an upper die holder (1) and a lower die holder (2); a punch (3) is provided at the bottom of the upper die holder (1); and a cavity (4) is provided on the surface of the lower die holder (2), characterized in that: The surface of the lower mold base (2) is also provided with a liquid storage box (5); a flow guiding mechanism is provided between the liquid storage box (5) and the cavity (4); the flow guiding mechanism is relatively slidably disposed in the lower mold base (2); an ejection mechanism is also provided in the lower mold base (2); a pressure column (6) is provided at the bottom of the upper mold base (1); a flow channel (6-1) connected to the flow guiding mechanism is provided in the pressure column (6); a nozzle (6-2) is provided on one side of the pressure column (6); the nozzle (6-2) is connected to the flow channel (6-1).

2. The cooling and lubrication system for a metal stamping die according to claim 1, characterized in that: The lower mold base (2) has a trapezoidal liquid outlet (2-1) on its surface relative to the liquid storage box (5); the drainage mechanism includes a drainage column (7); a drainage pipe (8) is provided on one side of the drainage column (7); the lower mold base (2) has a moving inner cavity (9) relative to the drainage column (7) and the drainage pipe (8).

3. The cooling and lubrication system for a metal stamping die according to claim 2, characterized in that: The inner cavity (9) is provided with a side baffle (10); the side baffle (10) is provided with a slot for the drainage tube (8) to move; the upper end of the drainage tube (8) is provided with a liquid guide plate (11); the drainage tube (8) is bent.

4. The cooling and lubrication system for a metal stamping die according to claim 3, characterized in that: The surface of the liquid guide plate (11) is provided with a plug (12); the plug (12) has the same outline and size as the trapezoidal liquid outlet (2-1); the liquid guide plate (11) is in the shape of an inverted trapezoid, and its bottom is connected to the drainage pipe (8).

5. The cooling and lubrication system for a metal stamping die according to claim 4, characterized in that: The drainage column (7) is provided with a liquid collection chamber (13); the lower end of the drainage tube (8) is connected to the liquid collection chamber (13); the liquid collection chamber (13) is provided with a top plate (14); the bottom of the liquid collection chamber (13) is provided with a through hole (18); the upper part of the liquid collection chamber (13) is provided with a liquid outlet channel (15).

6. The cooling and lubrication system for a metal stamping die according to claim 5, characterized in that: The ejection mechanism includes a push rod (16) located at the bottom of the inner side of the moving inner cavity (9); the push rod (16) passes through the through hole (18) and contacts the ejection plate (14); a protrusion (17) is provided on the outer side of the drainage column (7).

7. The cooling and lubrication system for a metal stamping die according to claim 6, characterized in that: The inner wall of the moving inner cavity (9) and the side wall (10) are provided with guide grooves relative to the protrusion (17); the protrusion (17) is slidably connected in the guide groove; a spring connected to the protrusion (17) is provided in the guide groove.

8. The cooling and lubrication system for a metal stamping die according to claim 7, characterized in that: The flow channel (6-1) and the liquid outlet channel (15) are arranged opposite to each other; the pressure column (6) pushes the flow guide column (7) down during the descent of the upper mold base (1); the flow channel (6-1) and the liquid outlet channel (15) are respectively provided with rubber sleeves.

9. The cooling and lubrication system for a metal stamping die according to claim 8, characterized in that: The bottom of the pressure column (6) is provided with an inlet that communicates with the flow channel (6-1); the nozzle (6-2) is located on the side of the pressure column (6) facing the punch (3) and the cavity (4); the liquid storage box (5) is connected to the oil cup through an oil pipe and a pump body.

10. A method for cooling and lubricating a metal stamping die according to claim 1. Its features include the following steps: Step 1: Place the metal workpiece in the cavity (4) to be stamped; and turn on the pump to add cooling lubricating oil into the reservoir (5); Step 2: After the cooling and lubricating oil has been added, start the stamping die to lower the upper die holder (1); Step 3: During the descent of the upper mold base (1), before the punch (3) contacts the metal workpiece, the pressure column (6) will contact the flow column (7) first and drive it to press down; after the pressure column (6) contacts the flow column (7), their respective flow channels (6-1) and liquid outlet channels (15) will be aligned and connected. Step four, the descent of the drainage column (7) will open the trapezoidal outlet (2-1) at the bottom of the liquid storage box (5) so that the cooling lubricating oil can enter the liquid collection chamber (13) inside the drainage column (7); Step 5: As the drainage column (7) continues to descend, the push rod (16) will be inserted into the through hole (14) and push the ejector plate (14) upward, reducing the internal space of the liquid collection chamber (13), so that the cooling lubricating oil generates pressure in the flow channel (6-1) and the liquid outlet channel (15), and is sprayed outward from the nozzle.

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