Continuous drawing die

Abstract

The utility model provides a continuous drawing die and relates to the field of dies. Comprising an upper die base and a lower die base, a plurality of punches are arranged on the upper die base, guide sleeves are arranged on the outer sides of the punches, a material belt lubricating assembly is arranged on one side of the lower die base, a lubricating mechanism is arranged in each guide sleeve, and each lubricating mechanism comprises an oil storage cavity and an annular oil outlet groove which are formed in the inner side of the corresponding guide sleeve. A communicating pipeline is arranged between the oil storage cavity and the annular oil outlet groove, the annular oil outlet groove is formed in the bottom end of the guide sleeve, an oil outlet slit is formed in the inner side of the annular oil outlet groove, and an oil conveying pipeline used for being connected with an external oil supply device is arranged at the top of the oil storage cavity. Through the arrangement of the lubricating mechanism and the material belt lubricating assembly, the lower end face and the side face of the punch can be evenly coated with lubricating oil, comprehensive protection on the punch is achieved, the abrasion degree of the punch is reduced, and the service life of the punch is prolonged.

Description

Technical Field

[0001] The utility model provides a continuous stretching die, which relates to the field of dies. Background Art

[0002] Continuous stretch forming is a method for casing production. Due to its high efficiency, it is widely used in the industrial field. During the continuous stretch forming process, the punch of the upper die moves downward, and the flange blank is subjected to the drawing force of the punch, which generates tensile force in the radial direction of the flange blank and compressive stress in the tangential direction of the flange blank. Under the action of these two forces, the material in the deformation area of ​​the flange blank undergoes plastic deformation and is continuously pulled into the lower die to form a cylindrical stretch part. The upper die punch will generate huge friction during the sliding process, and the punch will be seriously worn over time.

[0003] In the prior art, in order to reduce friction, lubricating oil is applied to the surface of the material strip before the material strip is stretched, such as disclosed in CN219703150U, a motor housing stretching die. However, the end face of the punch contacts the surface of the material strip, and during stretching, the side of the punch cannot be well contacted with the lubricating oil, and the friction generated on the side is more serious, so the punch cannot be well protected, resulting in serious wear on the side of the punch. To this end, we propose a continuous stretching die. Utility Model Content

[0004] The technical problem to be solved by the utility model is that lubricating oil is applied on the material strip so that the side surface of the punch cannot be well contacted with the lubricating oil, resulting in serious wear on the side surface of the punch.

[0005] In order to solve the above technical problems, the technical solution provided by the utility model is: a continuous stretching die, including an upper die base and a lower die base, a plurality of punches are arranged on the upper die base, a guide sleeve is arranged on the outer side of the punch, a material strip lubrication assembly is arranged on one side of the lower die base, a lubrication mechanism is arranged in the guide sleeve, the lubrication mechanism includes an oil storage chamber and an annular oil outlet groove opened on the inner side of the guide sleeve, a connecting pipe is opened between the oil storage chamber and the annular oil outlet groove, the annular oil outlet groove is arranged at the bottom end of the guide sleeve, and an oil outlet slit is arranged on the inner side of the annular oil outlet groove, and an oil delivery pipeline for connecting an external oil supply device is opened on the top of the oil storage chamber.

[0006] Preferably, the material strip lubrication assembly includes support plates symmetrically fixed to the lower mold base, lubrication rollers and pressure rollers rotatably arranged between the support plates, and an oil tank fixed between the support plates. The lubrication roller is arranged directly below the oil tank, an oil outlet is opened at the bottom of the oil tank, and an oil-absorbing cotton strip is fixed to the inner side of the oil outlet, and the oil-absorbing cotton strip is in close contact with the upper surface of the lubrication roller.

[0007] Preferably, the top of the oil tank is connected to an oil filling pipe, the lubrication roller is connected to a motor, and the motor is fixedly connected to the outer side of the support plate.

[0008] Preferably, a plurality of the communicating pipes are arranged at equal angles around the annular oil outlet groove.

[0009] Preferably, the opening width of the oil outlet slit is 3 to 6 mm.

[0010] Preferably, the outer surfaces of the lubrication roller and the pressure roller are both fixedly connected with sponge protective sleeves.

[0011] The beneficial effects of the utility model are as follows: through the provision of the lubrication mechanism and the material belt lubrication assembly, the lower end face and the side face of the punch can be evenly coated with lubricating oil, thereby achieving comprehensive protection for the punch, reducing its wear degree and extending its service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 The utility model is a schematic diagram of the overall structure of a continuous stretching die.

[0013] Figure 2 The utility model is a schematic diagram of the lubrication mechanism structure of a continuous stretching die.

[0014] Figure 3 This is an enlarged view of point A of a continuous stretching die of the utility model.

[0015] Figure 4 The utility model is a schematic diagram of the structure of a material strip lubrication component of a continuous stretching die.

[0016] (1. Lower die base; 2. Upper die base; 3. Material strip lubrication assembly; 4. Oil tank; 5. Oil filling pipe; 6. Motor; 7. Support plate; 8. Lubrication roller; 9. Pressing roller; 10. Oil-absorbing cotton strip; 11. Punch; 12. Guide sleeve; 13. Oil storage chamber; 14. Oil pipeline; 15. Connecting pipeline; 16. Annular oil outlet groove; 17. Oil outlet slit) DETAILED DESCRIPTION

[0017] The preferred embodiments of the present utility model will be described in detail below in conjunction with the accompanying drawings.

[0018] Reference Figures 1 to 4The utility model provides a continuous stretching die, including an upper die base 2 and a lower die base 1. The upper die base 2 is provided with a plurality of punches 11. A guide sleeve 12 is provided on the outer side of the punch 11. A lubrication mechanism is provided in the guide sleeve 12. The lubrication mechanism includes an oil storage chamber 13 and an annular oil outlet groove 16 provided on the inner side of the guide sleeve 12. A connecting pipe 15 is provided between the oil storage chamber 13 and the annular oil outlet groove 16. The connecting pipe 15 has a plurality of equal angles around the annular oil outlet groove 16. The annular oil outlet groove 16 is provided at the bottom end of the guide sleeve 12, and an oil outlet slit 17 is provided on the inner side of the annular oil outlet groove 16. The opening width of the oil outlet slit is 3 to 6 mm. An oil delivery pipeline 14 for connecting an external oil supply device is provided on the top of the oil storage chamber 13. Specifically, Figure 2 , Figure 3 As shown, the external oil supply device can deliver lubricating oil to the oil pipeline 14, so that the lubricating oil fills the oil pipeline 14, the oil storage chamber 13, the annular oil outlet groove 16 and the inner side of the oil outlet slit 17. Since the side wall of the punch 11 is also in contact with the inner wall of the guide sleeve 12, and the opening of the oil outlet slit 17 is narrow, the lubricating oil will not overflow in large quantities. The oil is continuously supplied to the oil pipeline 14 through the external oil supply device, and the lubricating oil will continuously overflow from the oil outlet slit 17 to the side wall of the punch 11. The annular oil outlet slit 17 can evenly apply the lubricating oil to the side wall of the punch 11, thereby reducing the friction of the punch 11 during the continuous stretching process, thereby achieving the effect of protecting the punch 11.

[0019] Furthermore, if Figure 4 As shown, a material strip lubrication assembly 3 is provided on one side of the lower die base 1 in the utility model, and the material strip lubrication assembly 3 includes a support plate 7 symmetrically fixed to the lower die base 1, a lubrication roller 8 and a pressure roller 9 rotatably arranged between the support plates 7, and an oil tank 4 fixed between the support plates 7, the lubrication roller 8 is arranged directly below the oil tank 4, an oil outlet is opened at the bottom of the oil tank 4, and an oil-absorbing cotton strip 10 is fixed to the inner side of the oil outlet, the oil-absorbing cotton strip 10 is in close contact with the upper surface of the lubrication roller 8, the lubrication roller 8 is connected to a motor 6, and the motor 6 is fixed to the outer side of the support plate 7. Specifically, the lubricating oil in the oil tank 4 can soak the oil-absorbing cotton strip 10, and the lubricating oil can be applied to the lubricating roller 8 through the oil-absorbing cotton strip 10. The lubricating roller 8 can be driven to rotate by the motor 6. When the material strip is transmitted between the lubricating roller 8 and the pressure roller 9, the lubricating oil on the lubricating roller 8 can be transferred to the upper surface of the material strip. Therefore, during the stretching process, there is also lubricating oil between the lower end face of the punch 11 and the material strip. Through the setting of the lubricating mechanism and the material strip lubricating component 3, the lower end face and side face of the punch 11 can be evenly contacted with the lubricating oil, thereby achieving comprehensive protection for the punch 11, reducing its wear degree and extending its service life.

[0020] Furthermore, if Figure 4The top of the oil tank 4 is connected to an oil filling pipe 5, which is used to fill lubricating oil into the oil tank 4. The outer surfaces of the lubricating roller 8 and the pressure roller 9 are fixedly connected with sponge protective sleeves. The pressure roller 9 limits the material belt below the lubricating roller 8 so that the material belt can be in good contact with the lubricating roller 8 and thus be coated with lubricating oil. By setting the sponge protective sleeve, it is possible to avoid the pressure roller 9 and the lubricating roller 8 from causing damage to the material belt. At the same time, the sponge protective sleeve on the lubricating roller 8 is also conducive to absorbing and applying lubricating oil.

[0021] Working principle: the material strip passes through the material strip lubrication assembly 3, and lubricating oil is applied to the surface of the material strip by the lubrication roller 8. When the punch 11 moves downward, the lubricating oil overflowing from the oil outlet slit 17 is evenly applied to the side wall of the punch 11. Therefore, when the punch 11 and the material strip are punched and stretched, the lower end face and side face of the punch 11 are protected by lubricating oil to reduce friction, thereby achieving the effect of protecting the punch 11.

[0022] The above description of the utility model and its implementation methods is not restrictive. The drawings show only one implementation method of the utility model, and the actual structure is not limited thereto. In short, if ordinary technicians in this field are inspired by it and design structural methods and embodiments similar to the technical solution without creativity without departing from the purpose of the invention of the utility model, they should all fall within the protection scope of the utility model.

Claims

1. A continuous stretching die, comprising an upper die base and a lower die base, wherein the upper die base is provided with a plurality of punches, the outer side of the punches is provided with a guide sleeve, and one side of the lower die base is provided with a strip lubrication assembly, characterized in that: A lubrication mechanism is arranged in the guide sleeve, and the lubrication mechanism includes an oil storage chamber and an annular oil outlet groove which are opened on the inner side of the guide sleeve, a connecting pipe is opened between the oil storage chamber and the annular oil outlet groove, the annular oil outlet groove is arranged at the bottom end of the guide sleeve, and an oil outlet slit is arranged on the inner side of the annular oil outlet groove, and an oil delivery pipeline for connecting to an external oil supply device is opened on the top of the oil storage chamber.

2. A continuous stretching die according to claim 1, characterized in that: The material strip lubrication assembly includes support plates symmetrically fixed to the lower die base, lubrication rollers and pressure rollers rotatably arranged between the support plates, and an oil tank fixed between the support plates. The lubrication roller is arranged directly below the oil tank, an oil outlet is opened at the bottom of the oil tank, and an oil-absorbing cotton strip is fixed to the inner side of the oil outlet, and the oil-absorbing cotton strip is in close contact with the upper surface of the lubrication roller.

3. A continuous stretching die according to claim 2, characterized in that: The top of the oil tank is connected to an oil filling pipe, and the lubrication roller is connected to a motor, which is fixed to the outer side of the support plate.

4. A continuous stretching die according to claim 1, characterized in that: The communicating pipes are arranged at a plurality of equal angles around the annular oil outlet groove.

5. A continuous stretching die according to claim 1, characterized in that: The opening width of the oil outlet slit is 3 to 6 mm.

6. A continuous stretching die according to claim 2, characterized in that: The outer surfaces of the lubrication roller and the pressure roller are both fixedly connected with sponge protective sleeves.

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