Press mold

Abstract

The present invention provides a press die capable of correcting a gap between the dies without disassembling and reassembling the dies, the press die including an upper die and a lower die arranged along a first direction, the upper die including a first cam portion that moves a part of the other die in a second direction different from the first direction as one of the upper die and the lower die moves in the first direction, and a material fixing portion that fixes a material, the lower die including a second cam portion corresponding to the first cam portion, a molding portion configured to move together with the second cam portion and mold the material, and a material support portion that supports the material, the molding portion being divided into a plurality of regions along a third direction that is the length direction of the material, and a gap adjustment portion configured to move the molding portion in the second direction is arranged between the molding portion in some regions and the second cam portion.

Description

[Technical Field]

[0001] The present invention relates to press dies, and more particularly to press dies that allow for gap and axis alignment of structures. [Background technology]

[0002] Dies used in typical press work are assembled from individual components. Although each component can be precisely machined to ensure its dimensions, the accumulation of individual machining tolerances after assembly results in errors in the final dimensions. Therefore, when initially setting up a new die, metal plates of various thicknesses must be inserted between the components inside the die to ensure the desired gaps.

[0003] The metal plate used here is called a shim plate, and its role is to adjust the contact state by inserting it into the gap that occurs when the structures inside the mold are in contact with each other as surfaces. Shim plates are also a necessary mechanism for aligning axes during the mold setting process, and are also used as a means to correct the alignment between the upper and lower mold parts due to distortion or wear of individual structures caused by long-term use of the mold.

[0004] However, although the operation of correcting the gap using a shim plate is essential for stable mold operation and ensuring desired product dimensions, adding or changing a shim plate requires interrupting the operation, which reduces efficiency. In particular, reassembling after separating and inserting a shim plate results in reduced productivity. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Korean Patent Registration No. 10-1537381 Summary of the Invention [Problem to be solved by the invention]

[0006] The present invention has been made to solve the problems of the prior art as described above, and has an object to provide a press die that can correct the die gap without disassembling and reassembling the die. [Means for solving the problem]

[0007] In order to achieve the above object, the present invention provides the following press die.

[0008] In one embodiment, the present invention provides a press die including an upper die and a lower die arranged along a first direction, wherein the upper die includes a first cam portion that moves a portion of one of the upper die and the lower die in a second direction different from the first direction as the other die moves in the first direction, and a material fixing portion that fixes a material; the lower die includes a second cam portion corresponding to the first cam portion, a molding portion configured to move together with the second cam portion and mold the material, and a material support portion that supports the material; the molding portion is divided into a plurality of regions along a third direction that is a length direction of the material; and a gap adjustment portion configured to move the molding portion in the second direction is arranged between the second cam portions in some regions of the molding portion.

[0009] In one embodiment, the gap adjusting unit may include a moving member that contacts the molding unit, and a driving unit that moves the moving member.

[0010] In one embodiment, the molding portion includes a contact surface that contacts the movable member and is inclined with respect to the third direction, and the movable member has a surface on the molding portion side that is inclined with respect to the third direction, and a surface on the second cam portion side that has a wedge shape parallel to the third direction.

[0011] In an embodiment, the gap adjusting portion may include a limit block that limits the moving distance of the moving member in the third direction.

[0012] In one embodiment, the moving member may include a first groove extending in the third direction, and the limit block may be disposed inside the first groove.

[0013] In an embodiment, the gap adjusting portion may be provided at least in both end regions of the molding portion in the third direction.

[0014] In one embodiment, the driving unit may include a screw passing through the moving member so as to move the moving member in the third direction by rotation, and a handle connected to the screw to rotate the screw.

[0015] In one embodiment, a cam groove is formed on a surface of the second cam portion facing the molding portion, and the limit block may be arranged so as to be partially inserted into the cam groove, and the first cam portion in the upper mold may be arranged on both sides of the material fixing portion in the second direction, and the second cam portion in the lower mold may be arranged on both sides of the material supporting portion in the second direction.

[0016] In one embodiment, the present invention provides a press die including an upper die and a lower die arranged in a vertical direction, wherein the upper die includes a first cam portion that moves a second cam portion of the lower die as the upper die moves downward, and a material fixing portion that fixes a material, and the lower die includes a second cam portion that moves toward the material along the first cam portion in response to the first cam portion, a shaping portion that is arranged closer to the material than the second cam portion and moves together with the second cam portion to shape the material, and a material support portion that supports a material support portion, the shaping portion being divided into a plurality of regions along the length of the material, and a gap adjustment portion configured to move the shaping portion in the material direction is arranged between the second cam portions in some regions of the shaping portion, and the gap adjustment portion includes a wedge-shaped movable member, and the shaping portion moves in the material direction as the movable member moves. [Effects of the Invention]

[0017] With the above-described configuration, the present invention can provide a press die that allows easy and quick adjustment of the die gap.

[0018] Furthermore, the gap between the dies can be adjusted quickly, and a press die that can be machined to accurate dimensions without reducing productivity can be provided. [Brief explanation of the drawings]

[0019] [Figure 1] FIG. 1 is a schematic diagram of a press die using a simple rate. [Figure 2] FIG. 1 is a schematic diagram of a press die using a simple rate. [Figure 3] FIG. 1 is a partial perspective view of a press die according to an embodiment of the present invention. [Figure 4] FIG. 4 is an enlarged perspective view of a part of the mold in the embodiment of FIG. 3. [Figure 5] FIG. 4 is a plan view of a portion of the mold of FIG. 3. [Figure 6] FIG. 4 is a schematic diagram of the mold of FIG. 3. [Explanation of symbols]

[0020] 1: Press mold 100: Upper mold 110: Material fixing part 120: First cam part 200: Lower mold 210: Material support part 220: Cam support part 230: Second cam section 231: Inclined surface 233: Part 1 234:Second part 240: Molding section 240a~c: 1st~3rd molding section 241: Molding surface 242: Face 244:Through hole 245: Coupling pin 250: Shim plate 260: Gap adjustment part 261: Moving parts 262:Second side 263: 1st groove 264: 1st page 265:Screw 267: Fixed Block 270: Handle 280: Limit Block DETAILED DESCRIPTION OF THE INVENTION

[0021] Hereinafter, preferred embodiments will be described in detail with reference to the accompanying drawings so that those skilled in the art can easily practice the present invention. However, when describing preferred embodiments of the present invention in detail, detailed description of related well-known functions or configurations will be omitted if it is determined that such detailed description may unnecessarily obscure the gist of the present invention. Furthermore, the same reference numerals will be used throughout the drawings to refer to parts that perform similar functions and operations. In this specification, terms such as "top," "upper," "upper surface," "bottom," "lower," "bottom surface," and "side" are used based on the drawings and may actually differ depending on the direction in which elements or components are arranged.

[0022] Furthermore, throughout the specification, when a part is referred to as being "connected" to another part, this includes not only "directly connected" but also "indirectly connected" via another element in between. Furthermore, unless otherwise specified, "comprising" a certain component does not exclude other components, but means that other components may also be included.

[0023] Schematic diagrams of a press die that uses a shim plate are shown in Figures 1 and 2. Specifically, Figure 1 shows a schematic diagram of the press die before it forms a material, and Figure 2 shows a schematic diagram of the press die forming the material.

[0024] The press die 1 includes an upper die 100 and a lower die 200, and the upper die 100 is arranged in the vertical direction, which is the first direction 11, and molding is performed while the upper die 100 moves toward the lower die 200 by a press mechanism not shown.

[0025] The upper mold 100 includes a first cam portion 120 having an inclined surface 121 formed thereon so that the lower mold 100 moves in the left-right direction of FIG. 1, i.e., in a second direction 12 that is perpendicular to the first direction 11 and toward the material P, by moving in the first direction 11, and a material fixing portion 110 that pressurizes and fixes the material P placed on the material support portion 210 by moving the upper mold 100 in the first direction.

[0026] The lower mold 200 includes a second cam portion 230 having an inclined surface 231 corresponding to the inclined surface 121 of the first cam portion 120 so as to move the forming portion 240 in the second direction 12 in cooperation with the first cam portion 120 as the upper mold 100 moves along the first direction 11, a cam portion support portion 220 that supports one side of the first cam portion 120 when the first and second cam portions 120, 230 come into contact, the forming portion 240 configured to move together with the second cam portion 230 and arranged adjacent to the material P relative to the second cam portion 230 so as to come into contact with the material P to bend and form the material P, and a material support portion 210 arranged below the material fixing portion 110 and on which the material P is seated.

[0027] The first cam portion 120 and the second cam portion 230 have corresponding inclined surfaces 121, 231, and the forming portion 240, which moves together with the second cam portion 230 due to the inclined surfaces 121, 231, moves in the second direction 12 instead of the first direction 11, thereby bending the material P.

[0028] In the lower mold 200, the cam portion support portion 220 and the material support portion 210 do not move with the movement of the upper mold 100, and only the second cam portion 230 and the forming portion 240 move in the second direction 12. An LM guide 235 for guiding the movement in the second direction is provided below the second cam portion 230. The lower mold 200 includes a spring portion 237 that connects the cam portion support portion 222 and the second cam portion 230 and returns the second cam portion 230 to its original position when the upper mold 100 is raised.

[0029] Meanwhile, the forming unit 240 is disposed on the second cam unit 230, and a shim plate 250 is disposed between a surface 232 of the second cam unit 230 facing the forming unit 240 in the second direction 12 and a surface 242 of the forming unit 240 facing the second cam unit 230 and opposing the surface 232. The shim plate 250 adjusts the position of the forming unit 240 in the second direction on the second cam unit 230. That is, when a thick shim plate 250 is sandwiched, the forming unit 240 moves entirely toward the material support unit 210, whereas when a thin shim plate 250 is sandwiched, the forming unit 240 moves away from the material support unit 210. Therefore, the forming dimension can be adjusted by adjusting the distance between the forming unit 240 and the second cam unit 230 of the two members using the shim plate 250.

[0030] Although not shown, the upper and lower molds 100 and 200 are also arranged symmetrically on the opposite side of the second direction with respect to the material support part 210, and molding is performed on both sides of the material P.

[0031] As described above, the gap between the second cam portion 230 and the forming portion 240 is adjusted using the shim plate 250. However, to change the shim plate 250, the forming portion 240 must be separated from the second cam portion 230, replaced with a new shim plate 250, and then the forming portion 240 must be reattached to the second cam portion 230. However, this process takes a long time and inevitably reduces productivity. Furthermore, because it is not easy to change the shim plate 250, it is not possible to adjust it to the correct size every time, which affects the accuracy of forming.

[0032] A press die according to one embodiment of the present invention is shown in Figures 3 to 6. Specifically, Figure 3 shows a perspective view of one side of the press die according to one embodiment of the present invention, Figure 4 shows an enlarged perspective view of the press die of Figure 3, Figure 5 shows a partial plan view of the press die of Figure 3, and Figure 6 shows a schematic view of the press die of Figure 3.

[0033] A press die 1 according to one embodiment of the present invention includes an upper die 100 and a lower die 200, and the upper die 100 is arranged in the vertical direction, which is a first direction 11, and molding is performed by moving the upper die 100 toward the lower die 200 by a press mechanism not shown.

[0034] The upper mold 100 includes a first cam portion 120 having an inclined surface 121 formed thereon so that the lower mold 100 moves in the left-right direction of FIG. 1, i.e., in a second direction 12 that is perpendicular to the first direction 11 and toward the material P, by moving in the first direction 11, and a material fixing portion 110 (see FIG. 1) that pressurizes and fixes the material P placed on the material support portion 210 by moving the upper mold 100 in the first direction.

[0035] The lower mold 200 includes: a second cam portion 230 having an inclined surface 231 corresponding to the inclined surface 121 of the first cam portion 120 so as to move the forming portion 240 in the second direction 12 in cooperation with the first cam portion 120 as the upper mold 100 moves along the first direction 11; a cam portion support portion 220 that supports the first cam portion 120 when the first and second cam portions 120, 230 come into contact; a forming portion 240 configured to move together with the second cam portion 230 and disposed closer to the material P than the second cam portion 230 so as to come into contact with the material P to bend the material P; a gap adjustment portion 260 that is disposed between the forming portion 240 and the second cam portion 230 and moves the forming portion 240 in the second direction 12; and a material support portion 210 that is disposed below the material fixing portion 110 and on which the material P is seated.

[0036] In the lower mold 200, the forming section 240 is divided into a plurality of sections along the length direction of the material, i.e., along a third direction 13 perpendicular to the first and second directions 11 and 12. In this embodiment, the forming section 240 includes a first forming section 240a, a second forming section 240b, and a third forming section 240c. Because the forming section 240 is separated into the first to third forming sections 240a, 240b, and 240c, the forming section 240 can be adjusted separately along the third direction 13, which is the length direction of the material, thereby adjusting distortion due to gap differences along the third direction 13. The forming sections located at both ends along the third direction 13 are referred to as the first and second forming sections 240a and 240b, and the forming section located between the first and second forming sections 240a and 240b is referred to as the third forming section 240c.

[0037] That is, of the first to third forming portions 240a, 240b, 240c, only the first and second forming portions 240a, 240b can adjust the gap between the second cam portions 230a, 230b and the first and second forming portions 240a, 240b using the gap adjusting portion 260, thereby making it possible to adjust the forming dimension in the third direction 13 and even adjust the forming deviation in the length direction. Since the forming deviation in the length direction is relative in the length direction, it is not necessary to adjust the entire portion, and some of the forming portions 240c may not be adjusted.

[0038] Meanwhile, the second cam portion 230 may also be provided with a plurality of second cam portions 230a, 230b, but this is not essential and may be configured as a single portion if necessary, or may be configured to correspond to the first cam portion 120 of the upper mold 100 when the first cam portion 120 is configured with a plurality of first cam portions 120a, 120b. The same applies to the cam portion support portion 220. In other words, when the second cam portion 230 is configured with a plurality of second cam portions 230a, 230b, the cam portion support portion 220 is also configured with a plurality of cam portion support portions 220a, 220b.

[0039] A gap adjustment unit 260 is arranged between the forming units 240a, 240b, for which the gap is adjusted, and the second cam units 230a, 230b. In the case of the reference forming unit 240c, for which no gap adjustment is performed, no gap adjustment unit 260 is arranged between the forming unit 240c and the second cam units 230a, 230b. The gap adjustment unit 260 arranged between the first forming unit 240a and the second cam unit 230a is referred to as the first gap adjustment unit 260a, and the gap adjustment unit 260 arranged between the third forming unit 240c and the second cam unit 230b is referred to as the second gap adjustment unit 260. Because the first gap adjustment unit 260a and the second gap adjustment unit 260b have substantially the same configuration, the first gap adjustment unit 260a and the second gap adjustment unit 260b may also be referred to as the gap adjustment unit 260 in the following description.

[0040] Referring to Figures 4 to 6, the first cam portion 120 and the second cam portion 230 have corresponding inclined surfaces 121 and 231 with respect to the gap adjustment portion 260, and the gap adjustment portion 260 and the forming portion 240, which move together with the second cam portion 230 due to the inclined surfaces 121 and 231, move in the second direction 12 instead of the first direction 11, thereby bending and forming the material P.

[0041] The first forming portion 240a is disposed on the second cam portion 230a, and the first gap adjusting portion 260a is also disposed on the second cam portion 230a. Therefore, when the second cam portion 230a moves, the first forming portion 240a and the gap adjusting portion 260a move together.

[0042] The first cam portion 120 has a lower side with an inclined surface 121 on one side in the second direction 12. The inclined surface 121 is formed corresponding to the inclined surface 231 of the second cam portion 230a, and the second cam portion 230a moves in the second direction 12 as the upper mold 100 moves in the first direction 11.

[0043] The cam portion support part 220 is fixed and guides and supports the movement of the first cam portion 120 and the second cam portion 230. Although not shown, an elastic member that pulls the second cam portion 230 toward the cam portion support part 220 may be disposed in the cam portion support part 220, and when the upper mold 100 is elevated by the elastic member, the second cam portion 230 can move toward the cam portion support part 220.

[0044] The second cam portion 230a includes a first portion 233 including the inclined surface 231, and a second portion 234 having an upper surface lower than the first portion 233 so that the first forming portion 240a and the first gap adjusting portion 260a can be seated thereon. The first gap adjusting portion 260a is located on a surface 232 of the first portion 233 facing the first forming portion 240a in the second direction 12, and the first forming portion 240a is disposed on the inner side of the gap adjusting portion 260a in the second direction 12. The surface 232 of the second cam portion 230a facing the first forming portion 240a is parallel to the third direction 13. An LM guide may be disposed below the first forming portion 240a so that the first forming portion 240a moves only in the second direction 12.

[0045] The first gap adjustment portion 260a includes a movable member 261 that moves in the third direction 13 between the first molding portion 240a and the second cam portion 230a, a screw 265 that extends through the movable member 261 in the third direction 13 to move the movable member 261 in the third direction 13, a handle 270 that rotates the screw 265, and a fixed block 267 that rotatably supports the handle 270 and the screw 265 and has a portion connected to the second cam portion 230a.

[0046] A first surface 264 of the moving member 261 located relatively far from the material P in the second direction 12 is parallel to the third direction 13 in correspondence with the surface 232 of the second cam portion 230a, and a second surface 262 of the moving member 161 located closer to the material P in the second direction 12 is inclined by a first angle θ with respect to the third direction 13, and a surface 242 of the first shaping portion 240a that comes into close contact with the second surface 262 is also inclined by the first angle θ with respect to the third direction 13. Therefore, the moving member 261 has a substantially wedge shape, and by moving forward or backward in the third direction 13, the first shaping portion 240a moves closer to or away from the material P in the second direction 12.

[0047] In the present invention, the movable member 261 is configured as a gap adjustment portion 260a between the first molding portion 240a and the second cam portion 230a, and the first angle θ of the second surface 262 of the movable member 261 is formed at a small angle of 5° or less, allowing for precise gap adjustment.

[0048] Meanwhile, a first groove 263 is formed in the first surface 264 of the moving member 261 at the middle in the third direction 13, and a limit block 280 is disposed in the first groove 263 to limit the movement of the moving member 261 in the third direction 13. Since the length of the limit block 280 in the third direction 13 is shorter than the length of the first groove 263 in the third direction 13, the moving member 261 can move in the third direction 13 by the difference between the lengths of the first groove 263 and the limit block 280 in the third direction.

[0049] In addition, a screw groove corresponding to the screw 265 is formed on the inner side of the moving member 261. Therefore, as the screw 265 is rotated by the handle 270, the moving member 261 moves forward or backward. One side of the screw 265 may be rotatably connected to the fixed block 267, and the other side may be rotatably connected to the third forming unit 240c. The screw 265 and the handle 270 are configured to move the moving member 261, and therefore may be referred to as a driving unit.

[0050] The handle 270 or the fixed block 267 may include a sensor, for example, an encoder, for measuring the rotation of the handle 270, a calculation unit connected to the sensor for calculating the distance moved by the forming unit 240a from the rotation value, and a display unit for displaying the calculated movement distance, and the display unit displays the distance moved by the forming unit 240a as the handle 270 rotates, thereby helping the user to perform more precise gap adjustment. The display unit may be attached to the handle 270, but it is also possible that only the sensor is provided on the handle 270, and the calculation unit and display unit are provided on the fixed part of the lower mold 200 or the second cam part 230a.

[0051] A portion of the limit block 280 is inserted into the cam portion groove 238 formed in the second cam portion 230a, and the remainder is inserted into the first groove 263 of the moving member 261 of the first gap adjusting portion 260a. The limit block 280 has a surface perpendicular to the third direction 13, and the length of the limit block 280 in the third direction is the same as the length of the cam portion groove 238 in the third direction and is shorter than the length of the first groove 263 of the moving member 261 in the third direction.

[0052] The first forming portion 240a includes a forming surface 241 that contacts the material P by moving and applies pressure in the second direction 12 to bend it, a surface 242 that is in close contact with the second surface 262 of the moving member 261 on the opposite side of the forming surface 241, a through hole 244 that is formed on the upper surface of the first forming portion 240a in the first direction 11, and a connecting pin 245 that passes through the through hole 244 to connect the first forming portion 240a to the second cam portion 230a.

[0053] The through hole 244 is formed longer in the second direction than the head of the connecting pin 245, and when the connecting pin 245 is connected, the first molding part 240a can move back and forth in the second direction 12, and is movable only in the second direction 12 to prevent malfunction.

[0054] In the present invention, the gap between the second cam portion 230 and the molding portion 240 is adjusted via the gap adjusting portion 260 provided on the second cam portion 230 without using the shim plate 250 (see FIG. 1). Therefore, the gap between the components can be easily and quickly adjusted, and consistent molding can be achieved even after long-term use.

[0055] In addition, distortion of the material P caused by gap deviation in the third direction, which is the length direction of the material P, can be prevented by adjusting the gap deviation via the divided molding parts 240a, 240b, 240c, and the configuration of the handle 270 and the moving member 261 makes it possible to move small distances precisely, which is advantageous for gap adjustment.

[0056] As described above, the present invention has been described with a focus on one embodiment, but the scope of the present invention is not limited to the embodiment exemplified above, and various other modifications based on the present invention are possible within the technical scope described above for those skilled in the art.

Claims

1. an upper mold and a lower mold arranged along a first direction; the upper mold includes a first cam portion that moves a part of the upper mold or the lower mold in a second direction different from the first direction when one of the upper mold and the lower mold moves in the first direction, and a material fixing portion that fixes a material; the lower mold includes a second cam portion corresponding to the first cam portion, a molding portion configured to move together with the second cam portion and mold a material, and a material support portion configured to support the material, The molding portion is divided into a plurality of regions along a third direction, which is a length direction of the material, A press die, wherein a gap adjustment portion configured to move the molding portion in the second direction is disposed between the molding portion in a partial region and the second cam portion.

2. The press die according to claim 1 , wherein the gap adjusting portion includes a moving member that contacts the molding portion and a driving portion that moves the moving member.

3. the molding portion includes a contact surface that contacts the moving member and is inclined with respect to the third direction, The press die according to claim 2 , wherein the moving member has a wedge shape in which a surface on the molding portion side is inclined with respect to the third direction and a surface on the second cam portion side is parallel to the third direction.

4. The press die according to claim 3 , wherein the gap adjusting portion includes a limit block that limits a movement distance of the moving member in the third direction.

5. the moving member includes a first groove extending in the third direction, The press die according to claim 4 , wherein the limit block is disposed inside the first groove.

6. The press die according to claim 5 , wherein the gap adjusting portion is provided at least in both end regions of the molding portion in the third direction.

7. The press die according to claim 6, wherein the drive unit includes a screw that penetrates the movable member so as to move the movable member in the third direction by rotation, and a handle that is connected to the screw and rotates the screw.

8. a cam groove is formed on a surface of the second cam portion on the molding portion side, The press die according to claim 5 , wherein the limit block is arranged so as to be partially inserted into the cam portion groove.

9. In the upper die, the first cam portions are disposed on both sides of the material fixing portion in the second direction, The press die according to claim 1 , wherein the second cam portions of the lower die are disposed on both sides of the material support portion in the second direction.

10. The mold includes an upper mold and a lower mold arranged along the vertical direction, the upper die includes a first cam portion that moves the second cam portion of the lower die toward the material as the upper die moves in a vertical direction, and a material fixing portion that fixes the material, the lower mold includes a second cam portion that moves in the material direction along the first cam portion in response to the first cam portion, a forming portion that is disposed closer to the material than the second cam portion and moves together with the second cam portion to form the material, and a material support portion that supports a material support portion, The molding portion is divided into a plurality of regions along the length direction of the material, a gap adjusting portion configured to move the forming portion in the material direction is disposed between the forming portion in the partial region and the second cam portion; The gap adjusting portion includes a wedge-shaped movable member having an inclined surface inclined with respect to the length direction, and the molding portion moves in the material direction by movement of the movable member.

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