KR102634261B1 - Shear device of aluminum - Google Patents

Abstract

The present invention relates to an aluminum shearing device that reduces the processing process, improves the durability of the shear blade, and minimizes the generation of burrs and chips. The lower mold has the outer shape of the bottom surface of the processed product. An aluminum shearing device consisting of a lower mold containing a die and an upper mold where an upper mold pad having the outer shape of the upper surface of the processed product is mounted on the upper press body slide, and a cooling device configured separately from the upper mold and the lower mold. An aluminum shearing device comprising a lower die connected to the cooling device and an upper die connected to the cooling device.

Description

Aluminum shear device {SHEAR DEVICE OF ALUMINUM}

The present invention relates to an aluminum shearing device, and more specifically, to an aluminum shearing device that reduces machining processes, improves the durability of shear blades, and minimizes the generation of burrs and chips. .

The press process of processing parts from aluminum sheets includes drawing, which involves mounting a mold on a press and pressing it into a predetermined shape in the up and down directions, trimming, which cuts off unnecessary parts of the finished product, and creating additional shapes. It is common to go through the process of flanging, piercing, etc.

The above processes are combined and called a stamping process, and an aluminum panel is usually completed through an average of four processes: forming, cutting, bending, and hole processing. Among the above processes, the trimming process is a process of cutting off unnecessary parts of a panel that has been plastically processed from an aluminum sheet through a drawing process into a shape that conforms to the product design data, and is an important process that determines the quality of the entire cross-section of the finished product.

As described above, in the stamping equipment for trimming, a lower mold having the outline shape of the bottom side of the product is mounted on the lower bolster, and an upper mold having the outline shape of the top side of the product is installed on the upper part of the lower mold. It is mounted on a body-in slide, and the outer surface of the drawing panel is pressed and brought into close contact with the drawing-molded panel sandwiched between the lower mold and the unnecessary part of the drawing panel is removed through shearing.

The conventional mold applied to this trimming process largely consists of a ‘shear blade, upper mold pad, and lower mold pad’. In addition, the overall process flow is '(A) a drawing panel with a certain shape is seated on the upper surface of the lower mold pad, (B) the upper mold is lowered and the outer surface of the drawing panel is fixed by the upper and lower mold pads, (C) the shear blade. This is done in the order of shearing and removing unnecessary parts while descending. Afterwards, the production of aluminum finished products is completed through flanging and piercing processes.

Unlike the processing process of existing steel sheet materials, the aluminum trimming process of the above method has a problem in that chips are generated on the aluminum shear surface during the processing process. The cause of the above problem is due to the characteristics of the aluminum material. The basic elongation is lower than that of the steel plate, and the local deformation (elongation after necking) in the entire plastic deformation section is small, so brittle fracture occurs due to lack of ductility during shearing. Chips are generated as the 'Breaking zone' increases on the shear surface. In addition, the above-mentioned chips generally have the property of increasing further as the breaking zone increases compared to the shear zone during material shearing. Additionally, due to the above-mentioned characteristics of the aluminum material, burrs during the trimming process also occur much larger than during the steel sheet trimming process.

As described above, excessively generated chips remain inside the mold during the trimming process, and when the next drawing panel is seated on the trimming mold, they move to the upper surface of some panels due to air flow and are attached to the panel surface during the subsequent flanging and piercing processes. It causes defects such as marks on the panel surface.

In addition, since burrs generated during the aluminum trimming process require an additional, separate burr removal process to complete the production of finished aluminum products, the aluminum trimming process has the problem of adding additional work processes and increasing the product defect rate compared to the steel plate trimming process. Occurs.

On the other hand, due to the characteristics of aluminum, there is a problem in that aluminum adhesion occurs on the cutting edge of the shear blade during the aluminum trimming process. The above-mentioned problem also has a lower basic elongation than a steel plate, and a small local deformation (elongation after necking) in the entire plastic deformation section, so brittle fracture occurs due to lack of ductility during shearing, and aluminum sequestration occurs on the cutting edge of the shear blade during this process. This is the problem.

Republic of Korea Patent Publication No. 10-0346669

In order to solve the above problems, the purpose of the present invention is to provide an aluminum shearing device that reduces the need for a separate burr removal process, improves the durability of the shear blade, and minimizes the generation of chips and burrs during the shearing process. .

The present invention relates to an aluminum shearing device consisting of a lower mold including a lower mold pad having the outer shape of the bottom surface of the processed product, and an upper mold including an upper mold pad having the outer shape of the upper surface of the processed product mounted on the upper press body slide. , characterized in that it includes a cooling device configured separately from the upper mold and the lower mold, a lower mold pad connected to the cooling device, and an upper mold blade of the upper mold connected to the cooling device.

The present invention cools the lower pad, the aluminum material seated on the lower pad, and the upper die through a cooling device connected to the lower pad and the upper die, preventing brittle fracture due to lack of ductility during the aluminum shearing process, thereby preventing the generation of chips and burrs. There is an effect.

In addition, the present invention prevents the generation of chips and burrs during the aluminum shearing process, thereby eliminating a separate burr removal process, and has the effect of preventing defects due to chips generated during the shearing process.

In addition, the present invention has the effect of improving the durability of the shear blade by preventing aluminum from seizing on the cutting edge of the shear blade during the aluminum shearing process.

Figure 1 is an exemplary diagram showing the overall configuration of an aluminum shearing device according to the present invention.
Figure 2 is an exemplary diagram showing a lower die and cooling device according to the present invention.
Figure 3 is an exemplary view showing the plane of the lower die according to the present invention.
Figure 4 is a cross-sectional illustration showing the side of the lower die according to the present invention.
Figure 5 is an exemplary diagram showing an upper die and cooling device according to the present invention.

The detailed description of the means for solving the problem according to the present invention along with the attached drawings is as follows. However, the attached drawings may be exaggerated, omitted, or schematically depicted for the convenience of explanation of key parts, and the terms and names used in the explanation are not defined by dictionary meaning but are implicitly determined by the shape, action, role, etc. of the composition. The description of the direction is determined based on the direction first presented from the first drawing, and the description of the location is determined based on the center of the circle or the middle of each composition. Additionally, detailed descriptions of pre-registered known and common technologies may obscure the point, so they are omitted or replaced with simple symbols or names.

In addition, the specific structure, shape, shape, arrangement, size, etc. of the configuration that can be identified through the drawings, and the operation of the configuration and the resulting effects that can be inferred through the drawings, may obscure the point, so detailed explanations may be omitted. Bolts, welding areas, holes, etc. applied to join components can be omitted from the drawing as they may obscure the point.

Figure 1 is an exemplary diagram showing the overall configuration of an aluminum shearing device according to the present invention, Figure 2 is an exemplary diagram showing a lower die and a cooling device according to the present invention, and Figure 3 is a plan view of the lower die according to the present invention. It is an illustration, and Figure 4 is a cross-sectional illustration showing the side of the lower die according to the present invention.

Referring to FIG. 1, the aluminum shearing device according to the present invention includes a lower mold including a lower die 200 having the outline shape of the bottom surface of the processed product, and an upper die pad having the outline shape of the upper surface of the processed product. In the aluminum shearing device consisting of an upper die mounted on a body slide, a cooling device 100 configured separately from the upper mold and the lower mold, a lower die 200 connected to the cooling device 100, and the cooling device It includes a prize-shaped blade 300 connected to. In FIG. 1, only the cooling cylinder 110 of the cooling device 100 is shown, but in FIG. 2, the detailed configuration of the cooling device 100 is shown separately. In addition, in the following description, the remaining detailed configuration of the aluminum shearing device for trimming aluminum materials is omitted because it is a known technology.

Referring to Figures 2, 3, and 4, the cooling device 100 includes a compressor that supplies compressed air, a cooling cylinder 110 connected to the compressor, a lower die 200 and an upper die (described below) It includes a temperature monitoring device 120 connected to 300, a control device 130 that controls the temperature monitoring device 120, a cooling cylinder 110, and a compressor. The cooling device 100 according to the present invention is composed of a separate cooling device 100 in the drawing and is connected to the lower die 200 and the upper die 300, but is composed of a single cooling device 100 and is connected to the lower die 200. It can be connected simultaneously with (200) and the upper type blade (300).

Since the compressor is a typical compressor that compresses and supplies air using the power of an engine or motor, detailed description will be omitted. The cooling cylinder 110 generates a vortex inside and cools the compressed air supplied from the compressor to -20 degrees or lower.

Looking at the cooling cylinder 110 above in more detail, when the compressed air supplied from the compressor is supplied into the cooling cylinder 110 through the compressed air connection part 111, it is first introduced into the vortex rotation chamber and rotates at ultra-high speed at 1,000,000 RPM. will do. This rotating air is directed toward the warm air outlet 113 of the cooling cylinder 110, and some of it is discharged through the warm air outlet 113 by the control valve, and the remaining air is returned from the control valve to form a secondary vortex in the cooling channel. It goes out toward the connection part 112, and at this time, the secondary vortex flow loses heat while passing through the low pressure area inside the primary vortex flow and heads toward the cooling channel connection part 112, and the cooled air is cooled. It is supplied to the lower die 200 and the upper die 300 through the channel connection part 112.

In two rotating flows (rotating in the same direction and at the same angular velocity), the air particles in the inner flow take the same time to rotate (same angular velocity) as the air particles in the outer flow, so the actual speed of movement is lower than that in the outer flow. This difference in movement speed means that kinetic energy has been reduced, and this lost energy is converted into heat, raising the air temperature in the outer stream and lowering the temperature in the inner stream even further. Since the operating principle of the cooling cylinder 110 is a known technology, further detailed description will be omitted below.

The temperature monitoring device 120 measures the temperature of the lower die 200 and the upper die 300 and transmits the measured temperature to the control device 130, so that the control device 130 operates the compressor and cooling cylinder 110. Take control. Since the temperature monitoring device 120 and the control device 130 connected thereto are known technologies, detailed description thereof will be omitted.

Referring to Figures 2, 3, and 4, the lower die 200 has a hollow pad cooling channel 210 formed inside, is connected to the pad cooling channel 210, and has a hollow hole in the upper surface direction of the lower die 200. It includes a material cooling outlet 230 connected to the pad cooling channel 210 and a pad cold air outlet 220 connected to the outside of the lower die 200. That is, one side of the pad cooling channel 210 is connected to the cooling channel connection portion 112 of the cooling cylinder 110, and the other side of the pad cooling channel 210 is connected to the pad cold air outlet 220, and the pad cooling channel The upper part of (210) is connected to the material cooling outlet (230).

Cold air of -20 degrees or lower supplied through the cooling channel connection part 112 of the cooling cylinder 110 is supplied to the pad cooling channel 210 to lower the temperature of the lower die 200. A portion of the cold air supplied to the pad cooling channel 210 is discharged to the material cooling outlet 230 to cool the aluminum material seated on the lower die 200, and through this cooling action, it is possible to reduce the temperature due to lack of ductility during the aluminum shearing process. Prevents brittle fracture and prevents chips and burrs. As described above, the cold air supplied to the lower die 200 cools the lower die 200 and the aluminum material, and then is discharged to the outside of the lower die 2100 through the pad cold air outlet 220.

The pad cooling channel 210 according to the present invention does not necessarily have to follow the shape of the attached drawing, and can be modified according to the shape, thickness, and necessity of the lower die 200.

Figure 5 is an exemplary diagram showing an upper die and cooling device according to the present invention. As shown in Figure 5, the upper die 300 of the aluminum shearing device according to the present invention has an upper die cooling channel 310 formed hollow inside the upper die 300, and an upper die formed through a hole outside the upper die 300. Includes a cold air outlet (320). In FIG. 5, only the cooling cylinder 110 of the cooling device 100 is shown. However, since the cooling device 100 in the following description is the same as the cooling device 100 described above, detailed description will be omitted.

One side of the upper blade cooling channel 310 is connected to the cooling channel connection portion 112 of the cooling cylinder 110, and the other side of the upper blade cooling channel 310 is connected to the upper blade cold air outlet 320. Additionally, the cooling device 100 and the upper die 300 according to the present invention may be directly connected to each other or may be connected through other parts of the upper die.

Cold air of -20 degrees or lower supplied through the cooling channel connection part 112 of the cooling cylinder 110 is supplied to the upper die cooling channel 310 to lower the raised temperature of the upper die 300, and then It is discharged through the cold air outlet 320 and prevents a portion of the aluminum material cut during the aluminum shearing process from sticking to the upper die 300.

The upper die cooling channel 310 according to the present invention does not necessarily have to follow the shape of the attached drawing, and can be modified depending on the shape, thickness, and necessity of the upper die 300.

The aluminum shearing device according to the present invention maintains the temperature of the upper die 300 below 40 degrees through cooling of the upper die 300, preventing part of the aluminum material from being burned to the upper die 300, thereby preventing the upper die 300 from being burned. It improves the durability of (300) and cools the lower die (200) and the aluminum material, so that during the aluminum trimming process, the burr of the product is ±0.5 mm or less, the dimensional accuracy is ±0.5 mm or less, the shape accuracy is ±0.5 mm or less, and the hole tolerance is ±0.5. It improves product quality and reduces the defect rate by minimizing the generation of chips below mm.

The above-described present invention draws diagrams of the configuration of the present invention and specific components included in the configuration to help understand the principles of the configuration pursued by the present invention, and is explained based on the drawings, The structure, form, shape, arrangement, direction, and quantity of the configuration included in the present invention and its specific components are determined in consideration of the principle to be pursued, and may be changed in various ways as needed. The configuration and its specific components presented in the present invention illustrate the effect that a person skilled in the art would like to obtain from the present invention and what principle is most desirable to apply to obtain a better effect from the effect. It was done. Accordingly, it is most desirable to complete the present invention by including all of the configurations described above, but it can be completed by selecting or excluding some of the configurations described above depending on cost reduction, convenience of manufacturing, environmental conditions, or necessity. Also, one or more components can be separated and completed by merging with other components. In addition, each configuration described above may be independently applied to other technical fields other than this technical field, taking into account the principle, use, function, role, action, effect, etc. Based on this, the scope of rights of the present invention can be specified in the order of the broad scope of rights by specifying the claims of the present invention as inclusive as possible as follows.

100: Cooling device 110: Cooling cylinder
111: compressed air connection 112: cooling channel connection
113: Warmth outlet 120: Temperature monitoring device
130: Control device 200: Lower die
210: Pad cooling channel 220: Pad cold air outlet
230: Material cooling outlet 300: Upper type blade
310: Upper blade cooling channel 320: Upper blade cold air outlet

Claims (2)

In an aluminum shearing device consisting of a lower mold including a lower die 200 having the outer shape of the bottom surface of the processed product, and an upper mold in which an upper mold pad having the outer shape of the upper surface of the processed product is mounted on the upper press body slide. ;
A cooling device (100) configured separately from the upper and lower molds;
A lower die 200 connected to the cooling device 100;
It includes a prize-type upper blade 300 connected to the cooling device 100;
The cooling device 100 includes a compressor that supplies compressed air, a cooling cylinder 110 connected to the compressor, a temperature monitoring device 120 connected to the lower die 200 and the upper die blade 300, and the temperature monitor. It includes a control device 130 that controls the device 120, the cooling cylinder 110, and the compressor;
When compressed air is supplied into the cooling cylinder 110 through the compressed air connection part 111, the cooling cylinder 110 is first introduced into the vortex rotation chamber, rotates at high speed at 1,000,000 RPM, and then flows through the warm air outlet of the cooling cylinder 110 ( While heading towards 113), some of it is discharged through the warm air outlet 113 by the control valve, and the remaining air is returned from the control valve to form a secondary vortex and goes out toward the cooling channel connection part 112, inside the primary vortex flow. As the air passes through the low pressure area, it loses heat and flows toward the cooling channel connection part 112, and the cooled air is supplied to the lower die 200 and the upper die 300 through the cooling channel connection part 112. become,
The lower die 200 has a pad cooling channel 210 formed hollow inside, a material cooling outlet 230 connected to the pad cooling channel 210 and connected through a hole in the upper surface direction of the lower die 200, and the pad. It is connected to the cooling channel 210 and includes a pad cold air outlet 220 connected through the outside of the lower die 200;
The upper die 300 is hollow inside the upper die 300, and cold air of -20 degrees or lower is supplied through the cooling channel connection part 112 of the cooling cylinder 110 to raise the upper die 300. After lowering the temperature, the upper die cooling channel 310 is discharged through the upper die cold air outlet 320 to prevent a portion of the aluminum material cut during the aluminum shearing process from sticking to the upper die 300, and the upper die cooling channel 310. (300) An aluminum shearing device comprising an upper blade cold air outlet (320) formed through a hole with the outside. delete

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