Hardware flanging and tapping device

Abstract

A hardware flanging and tapping device is used for sequentially stretching, punching and tapping a hardware material belt conveyed in the set conveying direction and comprises a bottom plate which is arranged in the conveying direction and located on the lower side of the hardware material belt. A drawing lower die, a punching lower die, a shaping lower die and a tapping lower die; the device further comprises a top plate arranged on the upper side of the hardware material strap, and a stretching upper die, a stamping upper die, a shaping upper die and a tapping device are sequentially arranged on the top plate in the conveying direction. In the machining process, the workpiece is firstly subjected to stretching machining, the stretched part is punched, so that a flanged hole is formed, flanging machining of the workpiece is completed, the cracking situation of the flanging can be reduced through machining in the mode, the flanging with the large length can be machined, meanwhile, the machining efficiency is improved, and the machining cost is reduced. And tapping machining on the inner wall of the flanged hole can be completed in the die at the same time, the number of manual tapping procedures can be reduced, and the machining time cost is saved.

Description

Technical Field

[0001] The utility model relates to the technical field of hardware flanging and tapping equipment, in particular to a hardware flanging and hollow tapping device. Background Art

[0002] In the process of processing hardware and sheet metal parts, they are often flanging, that is, using the mold to turn the hole edge or external aid on the sheet into a whole edge. This stamping method can be used to process three-dimensional parts with special spatial shapes and good rigidity. The flanging part is usually used as the connection between two parts. At the same time, as the requirements for products gradually increase, the requirements for flanging in the flanging process are also getting higher and higher.

[0003] In the current flanging process, a punching process is usually performed on the sheet material using a mold, and then the inner edge of the punched hole is folded and stretched through the mold, and then tapping is performed in the formed flanging hole. However, this processing technology often causes cracking of the flanging hole during the flanging process of the punched hole, and as the height of the flanging increases, the probability of cracking gradually increases. Therefore, higher flanging cannot be processed. After completing the flanging process, another tapping process is required, and the subsequent tapping process additionally increases the production cost.

[0004] Therefore, there is an urgent need for a device that can perform flanging, punching and tapping on hardware to solve the above problems. Utility Model Content

[0005] The purpose of the utility model is to provide a hardware flanging and tapping device. In order to solve the above technical problems, the utility model adopts the following technical solutions:

[0006] A hardware flanging and tapping device is used to sequentially stretch, punch and tap a hardware material strip conveyed along a predetermined conveying direction, comprising a bottom plate arranged along the conveying direction and located at the lower side of the hardware material strip, and the bottom plate is also sequentially arranged along the conveying direction.

[0007] A lower drawing die, wherein a plurality of drawing holes are arranged on the top surface of the lower drawing die;

[0008] A punching lower die, wherein a plurality of punching holes corresponding to the stretching holes are arranged on the top surface of the punching lower die;

[0009] A shaping lower die, on which a plurality of shaping columns corresponding to the punching hole positions are arranged;

[0010] A tapping lower die, wherein a plurality of tapping holes corresponding to the punching holes are formed on the tapping lower die;

[0011] It also includes a top plate arranged on the upper side of the hardware material belt, which is used for stamping in the direction toward the bottom plate, and the top plate is provided with

[0012] A stretching upper die, the stretching upper die corresponds to the stretching lower die, and is provided with a stretching ejector rod for positioning the material strip within the stretching hole for stretching after the die is closed;

[0013] A stamping upper die, which is arranged corresponding to the punching lower die and is provided with a punch for punching the stretched portion of the metal strip within the punching hole after the die is closed;

[0014] A shaping upper die, which is arranged corresponding to the shaping lower die and is provided with a shaping hole for the shaping column to penetrate;

[0015] A tapping device is provided with a tap corresponding to the tapping hole position.

[0016] Furthermore, the lower stretching die and the upper stretching die are each provided with a plurality of holes arranged side by side, and the stretching holes have an inner surface with an arc structure.

[0017] Furthermore, the depths of the stretching holes of the plurality of stretching lower dies gradually increase along the conveying direction.

[0018] Furthermore, a first die core, a second die core, a third die core and a fourth die core are arranged on the punching lower die along the conveying direction, and punching holes are arranged on the four die cores; a first die cavity, a second die cavity, a third die cavity and a fourth die cavity matched with the four die cores are arranged on the stamping upper die, and punches matched with the punching holes are arranged in the four die cavities.

[0019] Furthermore, the punching holes on the first mold core are provided with a cylindrical circumferential surface, and the bottom of the punching holes on the first mold core is provided with an arc shape; the punch in the first mold cavity is provided with a cylindrical structure, and its end is in a protruding arc shape;

[0020] The punching hole on the second mold core is provided with a cylindrical inner circumferential surface, and the bottom of the punching hole on the second mold core is provided with a plane structure, and a convex portion is provided on the bottom; the punch on the second mold cavity is provided with a cylindrical structure, and an inner concave portion is provided at the end of the punch on the second mold cavity;

[0021] The punching hole on the third die core is provided with a cylindrical inner circumferential surface, and a cutting hole extending downward is provided at the bottom of the punching hole on the third die core, and the inner diameter of the cutting hole is smaller than the inner diameter of the punching hole on the third die core; the punch on the third die cavity is provided with a cylindrical structure, and a head adapted to the cutting hole is formed at the end;

[0022] The punching holes on the fourth mold core are provided with a cylindrical inner surface, and its depth dimension is greater than the depth dimensions of the punching holes on the other mold cores; the punch in the fourth mold cavity is a cylindrical structure, and its end is provided with a cone.

[0023] Furthermore, a fifth mold core is formed on the shaping lower mold, and a receiving hole adapted to the shaping column is arranged on the fifth mold core. The shaping column is coaxially fixedly installed in the receiving hole and extends toward the outside of the receiving hole, and its end is formed into a cylindrical shape.

[0024] Furthermore, a spacing distance that matches the thickness of the hardware strip is defined between the accommodating hole and the shaping column.

[0025] The beneficial effects produced by the utility model are as follows:

[0026] In the process of flanging and tapping the hardware strip, the hardware strip is driven by a conveying device to be conveyed in a predetermined direction. During the conveying process, the multiple lower molds located on the bottom plate are sequentially passed, and the top plate is driven by the driving device to move toward the bottom plate, so that the upper mold and the lower mold on the top plate are molded together to perform stamping processing on the hardware strip located in the middle. Through this technical solution, it is possible to perform flanging and tapping processing on hardware. During the processing, the workpiece is first stretched, and then the stretched part is punched to form a flanging hole, and the flanging of the workpiece is completed. The above processing method can reduce the cracking of the flanging, and can process a flanging with a larger length. At the same time, the tapping processing of the inner wall of the flanging hole can be completed in the mold at the same time. During the tapping process, the restriction of the tapping hole position can reduce the cracking of the flanging hole during the tapping process, and it can reduce the manual increase of the tapping process, saving the time cost of processing. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a three-dimensional structural schematic diagram of the utility model.

[0028] Figure 2 It is a schematic diagram of the explosion structure of the utility model.

[0029] Figure 3 It is a schematic diagram of the structure of the utility model after the upper die and the lower die are laid flat.

[0030] Figure 4 It is a structural schematic diagram of a base plate and a plurality of lower molds in the utility model.

[0031] Figure 5 for Figure 4 A partial enlarged view of point A in the middle.

[0032] Figure 6 for Figure 4 A partial enlarged view of point B in the middle.

[0033] Figure 7 for Figure 4 A partial enlarged view of point C in the middle.

[0034] Figure 8 It is a structural schematic diagram of the top plate and several upper molds in the utility model.

[0035] Fig. 9 for Figure 8 A partial enlarged view of point D in the middle.

[0036] Fig.10 for Figure 8 A partial enlarged view of point E in the middle.

[0037] In the figure: 001-material strip; 100-bottom plate; 110-drawing lower die; 111-drawing hole;

[0038] 120-punching lower die; 121-punching hole position; 130-shaping lower die; 131-shaping column; 140-tapping lower die; 141-tapping hole position; 200-top plate; 210-stretching upper die; 211-stretching ejector rod; 220-stamping upper die; 221-punch; 230-shaping upper die; 231-shaping hole; 240-tapping device; 241-tap; 122-first die core; 123-second die core; 124-third die core; 125-fourth die core; 222-first die cavity; 223-second die cavity; 224-third die cavity; 225-fourth die cavity; 1231-protrusion; 2231-inner concave portion; 1231-cutting hole; 2241-head; 132-fifth die core; 133 - accommodating hole; 150 - cutting lower die; 250 - cutting upper die; 160 - forming lower die; 161 - forming die core; 260 - forming upper die; 261 - forming die cavity. DETAILED DESCRIPTION

[0039] In order to facilitate the understanding of those skilled in the art, the present invention is further described below in conjunction with the embodiments and drawings, and the contents mentioned in the implementation modes are not intended to limit the present invention. The present invention is described in detail below in conjunction with the drawings.

[0040] The embodiment of the utility model provides a hardware flanging and tapping device 240, which can complete stretching, punching and tapping processing on the hardware material strip 001 conveyed along a predetermined direction. The flanging processing is performed by this technical solution, which can reduce the probability of cracking during the flanging and reduce the number of defective products. At the same time, it can perform tapping in the mold, reduce the number of steps for tapping the workpiece, and reduce the labor intensity and production costs of workers.

[0041] like Figure 1-10 As shown, a hardware flanging and tapping device 240 is used to sequentially stretch, punch and tap a hardware material strip 001 conveyed along a predetermined conveying direction, including a bottom plate 100 arranged along the conveying direction and located at the lower side of the hardware material strip 001, and a top plate 200 arranged on the upper side of the hardware material strip 001 corresponding to the bottom plate 100, and a stretching lower die 110, a punching lower die 120, a shaping lower die 130 and a tapping lower die 140 are sequentially arranged on the bottom plate 100 along the conveying direction, wherein a plurality of stretching holes 111 are arranged on the top surface of the stretching lower die 110; a plurality of punching holes 121 corresponding to the stretching holes 111 are arranged on the top surface of the punching lower die 120; a plurality of shaping columns 131 corresponding to the punching holes 121 are arranged on the shaping lower die 130; and a plurality of shaping columns 131 corresponding to the punching holes 121 are arranged on the tapping lower die 140. A plurality of tapping holes 141 corresponding to the punching holes 121 are provided on the top plate 200; a stretching upper die 210, a stamping upper die 220, a shaping upper die 230, and a tapping device 240 are sequentially arranged on the top plate 200 along the conveying direction, wherein the stretching upper die 210 corresponds to the stretching lower die 110, and is provided with a stretching ejector rod 211 for stretching the material strip 001 into the stretching hole 111 after the mold is closed; the stamping upper die 220 is arranged corresponding to the punching lower die, and is provided with a punch 221 for punching the stretched part of the hardware material strip 001 into the punching hole 121 after the mold is closed; the shaping upper die 230 is arranged corresponding to the shaping lower die 130, and is provided with a shaping hole 231 for the shaping column 131 to penetrate; a tap 241 corresponding to the tapping hole 141 is arranged on the tapping device 240.

[0042] In the process of flanging and tapping the metal strip 001, the metal strip 001 is driven by a conveying device to be conveyed in a predetermined direction, and in the process of conveying, it passes through multiple lower dies located on the bottom plate 100 in turn, and the top plate 200 is driven by the driving device to move toward the bottom plate 100, so that the upper die and the lower die on the top plate 200 are molded together to perform stamping processing on the metal strip 001 located in the middle. The specific stamping process is: when the metal strip 001 passes through the stretching lower die 110, the stretching upper die 210 is driven by the top plate 200 to move toward the stretching lower die 110 and molded with it, so that the metal strip 001 is pressed in the stretching hole position 110 under the pressure of the stretching top plate 200. 1, and through stretching, a convex position protruding toward the lower side is formed on the hardware strip 001. Subsequently, the hardware strip 001 is conveyed to the position of the punching lower die 120 via a conveying device, and the top of the convex position that has been stretched and formed is punched. The stamping upper die moves toward the direction of the punching lower die 120 driven by the top plate 200, so that the punch 221 gradually extends into the punching hole 121. At this time, the convex position on the hardware strip 001 is located within the punching hole 121 of the punching lower die 120, and the punch 221 punches the bottom of the convex position of the strip 001 located within the punching hole 121, thereby processing a structure with a flipped hole on the strip 001. The material strip 001 is processed through the above-mentioned process, and the material strip 001 is pre-stretched to form a raised position, and the bottom of the raised position is punched to complete the flanging process. Through the above-mentioned technical scheme, the cracking of the flanging hole can be reduced during the flanging process, and the defective rate can be reduced; at the same time, the conveying device conveys the punched material strip 001 toward the shaping lower die 130 to shape the end of the flanging hole. Specifically, after the material strip 001 is conveyed to the position of the shaping lower die 130, the shaping column 131 is sleeved in the flanging hole. At the same time, the shaping upper die 230 is driven by the top plate 200 to move toward the shaping lower die 130 and close the mold with it, so that the material strip 001 is The shaping lower die 130 and the shaping upper die 230 are tightened, and then the shaping column 131 shapes the flanging hole, making the flanging hole more regular, especially the opening position of the flanging hole more neat; the material strip 001 is conveyed to the tapping lower die 140 position through the conveying device, and the flanging hole is located within the tapping hole position 141. At this time, the tapping device 240 moves toward the tapping lower die 140 driven by the top plate 200, and the tap 241 moves toward the tapping hole position 141, thereby tapping the inner wall of the flanging hole located in the tapping hole position 141. During the tapping process of the flanging hole, the inner wall of the tapping hole position 141 limits the flanging hole, thereby avoiding cracking of the flanging hole during the tapping process.The technical solution can be used to perform hole tapping processing on hardware. During the processing, the workpiece is first stretched, and then the stretched part is punched to form a hole, thereby completing the flanging processing of the workpiece. Processing in the above manner can reduce the cracking of the flanging, and can process a flanging with a larger length. At the same time, the tapping processing of the inner wall of the hole can be completed in the mold. During the tapping process, the restriction of the tapping hole position 141 can reduce the cracking of the hole during the tapping process, and can reduce the manual addition of the tapping process, saving the time cost of processing.

[0043] In this embodiment, the lower drawing die 110 and the upper drawing die 210 are respectively provided with a plurality of mutually parallel drawing holes 111 having an inner surface with an arc structure. The depth of the drawing holes of the plurality of lower drawing dies 110 gradually deepens along the conveying direction. By providing a plurality of lower drawing dies 110 and upper drawing dies 210, the processing position of the hardware strip 001 can be stretched multiple times, thereby improving the precision and depth of the stretching process.

[0044] In this embodiment, the first die core 122, the second die core 123, the third die core 124 and the fourth die core 125 are arranged on the punching lower die 120 along the conveying direction, and the four die cores are all provided with a punching hole 121; the first die cavity 222, the second die cavity 223, the third die cavity 224 and the fourth die cavity adapted to the four die cores are arranged on the stamping upper die, and the punches 221 adapted to the punching hole 121 are arranged in the four die cavities. The punching hole 121 on the first die core 122 is provided with a cylindrical circumferential surface, and the bottom of the punching hole 121 on the first die core 122 is arranged to be in an arc shape; the punch 221 in the first die cavity 222 is provided with a cylindrical structure, and its end is in a protruding arc shape;

[0045] The punching hole 121 on the second mold core 123 is provided with a cylindrical inner circumferential surface, and the bottom of the punching hole 121 on the second mold core 123 is provided with a flat structure, and a convex portion 1231 is provided on the bottom; the punch 221 on the second mold cavity 223 is provided with a cylindrical structure, and an inner concave portion 2231 is provided at the end of the punch 221 on the second mold cavity 223;

[0046] The punching hole 121 on the third mold core 124 is provided with a cylindrical inner circumferential surface, and a cutting hole 1241 extending downward is provided at the bottom of the punching hole 121 on the third mold core 124, and the inner diameter of the cutting hole 1241 is smaller than the inner diameter of the punching hole 121 on the third mold core 124; the punch 221 on the third mold cavity 224 is provided with a cylindrical structure, and a head 2241 adapted to the cutting hole 1241 is formed at the end;

[0047] The punching hole 121 on the fourth mold core 125 is provided with a cylindrical inner surface, and its depth dimension is greater than the depth dimension of the punching holes 121 on the other mold cores; the punch 221 in the fourth mold cavity is a cylindrical structure, and its end is provided with a cone.

[0048] The punching lower die and the stamping upper die 220 are arranged into four parts, and the punching process of the material strip 001 is completed through four steps to ensure that the side wall of the hole will not crack during the punching process of the material strip 001, thereby ensuring the yield rate. During the punching process of the material strip 001, by setting the punching hole position 121 of the first die core 122 to a cylindrical surface, when the punch 221 punches the material strip 001, the inner wall of the hole on the material strip 001 can be shaped to form a cylindrical hole position; then the punching hole position 121 on the second die core 123 is The bottom of the die 21 is provided with a raised portion 1231 that is raised upward, and at the same time, the end of the punch 221 located above the second die cavity 223 is provided with an inner recess 2231 that is matched with the raised portion 1231, so that when the punching hole 121 located in the second die core 123 is punched, the part that is raised inward at the bottom of the punching hole can be formed, and the part has a bending mark with the bottom of the punching hole, and then enters the third die core 124 for processing. When the punch 221 located in the third die cavity 224 moves toward the punching hole 121 located in the third die core 124, the punch 221 is pressed toward the punching hole 121 located in the third die core 124. During stamping, the bottom of the punching hole 121 of the third die core 124 has a cutting hole 1241. The cutting hole 1241 is designed to have a diameter substantially the same as that of the raised portion 1231. When the punch 221 is pressed in and the bottom of the punch hole is punched, the head 2241 of the punch 221 cooperates with the cutting hole 1241 to cut the raised portion 1231 located above the punch hole. Since there is a bending mark between the raised portion 1231 above the punch hole and the bottom of the punch hole, the strength of the raised portion 1231 is relatively low compared to other positions, so it is easier to be cut, and during the cutting process, It will not affect other parts of the punched hole. Therefore, the punched hole will not be damaged during the cutting process, and the hole cracking can be avoided. Subsequently, the processed material strip 001 is transported to the fourth mold core 125, and the punched hole is placed in the punching hole position 121 on the fourth mold core 125. The punch 221 in the fourth mold cavity is punched downward. Since the end of the punch 221 of the fourth mold cavity is set to a conical shape, it can extend into the punching hole at the bottom of the punched hole during the stamping process, and the punching hole at the bottom of the punched hole can be arranged by gradually extending therein.

[0049] By performing punching processing on the material strip 001 through the above structure, damage to the punched hole can be reduced during the punching process, thereby avoiding cracks on the inner wall of the punched hole.

[0050] In this embodiment, a fifth mold core 132 is formed on the shaping lower mold 130, and a receiving hole 133 matching the shaping column 131 is set on the fifth mold core 132. The shaping column 131 is coaxially fixedly installed in the receiving hole 133 and extends toward the outside of the receiving hole 133, and its end is formed into a cylindrical shape. The spacing distance between the receiving hole 133 and the shaping column 131 is matched with the thickness of the hardware strip 001. It can ensure that during the process of shaping the hole, the inner wall of the hole is limited and protected by the inner wall of the receiving hole 133 to avoid cracking during the shaping process.

[0051] It can be imagined that a cutting lower mold 250150 and a cutting upper mold are provided on the bottom plate 100 and the top plate 200, which are used to punch and cut useless parts on the hardware strip 001 so that the strip 001 forms a predetermined required shape. At the same time, a molding lower mold 160 and a molding upper mold 260 are provided on the bottom plate 100 and the top plate 200, and a molding mold core 161 is provided on the molding lower mold 160. Similarly, a molding mold cavity 261 matched with the molding mold core 161 is provided on the molding upper mold 260. The strip 001 can be molded into a predetermined shape by mutually engaging the molding molds. It can be imagined that the positions of the cutting mold and the molding mold can be appropriately adjusted according to the convenience of production, so as to meet the requirements of the production process.

[0052] The above are only preferred embodiments of the present invention, and are not intended to limit the present invention in any form. Although the present invention is disclosed as a preferred embodiment as above, it is not intended to limit the present invention. Any technician familiar with the profession can make some changes or modifications to equivalent embodiments of equivalent changes by using the technical contents disclosed above without departing from the scope of the technical solution of the present invention. However, any simple modifications, equivalent changes and modifications made to the above embodiments according to the technology of the present invention, which do not depart from the content of the technical solution of the present invention, are within the scope of the technical solution of the present invention.

Claims

1. A hardware flanging and tapping device, used for sequentially stretching, punching and tapping a hardware strip conveyed along a predetermined conveying direction, comprising a bottom plate arranged along the conveying direction and located at the lower side of the hardware strip, characterized in that: The bottom plate is also provided with, in sequence, A lower drawing die, wherein a plurality of drawing holes are arranged on the top surface of the lower drawing die; A punching lower die, wherein a plurality of punching holes corresponding to the stretching holes are arranged on the top surface of the punching lower die; A shaping lower die, on which a plurality of shaping columns corresponding to the punching hole positions are arranged; A tapping lower die, wherein a plurality of tapping holes corresponding to the punching holes are formed on the tapping lower die; It also includes a top plate arranged on the upper side of the hardware material belt, which is used for stamping in the direction toward the bottom plate, and the top plate is provided with A stretching upper die, the stretching upper die corresponds to the stretching lower die, and is provided with a stretching ejector rod for positioning the material strip within the stretching hole for stretching after the die is closed; A stamping upper die, which is arranged corresponding to the punching lower die and is provided with a punch for punching the stretched portion of the metal strip within the punching hole after the die is closed; A shaping upper die, which is arranged corresponding to the shaping lower die and is provided with a shaping hole for the shaping column to penetrate; A tapping device is provided with a tap corresponding to the tapping hole position.

2. A hardware flanging and tapping device according to claim 1, characterized in that: The lower drawing die and the upper drawing die are respectively provided with a plurality of holes arranged side by side, and the drawing holes have inner surfaces with arc structures.

3. A hardware flanging and tapping device according to claim 2, characterized in that: The depths of the stretching holes of the plurality of stretching lower dies gradually increase along the conveying direction.

4. A hardware flanging and tapping device according to claim 1, characterized in that: A first die core, a second die core, a third die core and a fourth die core are arranged on the punching lower die along the conveying direction, and punching holes are arranged on the four die cores; a first die cavity, a second die cavity, a third die cavity and a fourth die cavity matched with the four die cores are arranged on the stamping upper die, and punches matched with the punching holes are arranged in the four die cavities.

5. A hardware flanging and tapping device according to claim 4, characterized in that: The punching holes on the first mold core are provided with a cylindrical circumferential surface, and the bottom of the punching holes on the first mold core is provided with an arc shape; the punch in the first mold cavity is provided with a cylindrical structure, and its end is in a protruding arc shape; The punching hole on the second mold core is provided with a cylindrical inner circumferential surface, and the bottom of the punching hole on the second mold core is provided with a plane structure, and a convex portion is provided on the bottom; the punch on the second mold cavity is provided with a cylindrical structure, and an inner concave portion is provided at the end of the punch on the second mold cavity; The punching hole on the third mold core is provided with a cylindrical circumferential inner surface, and a cutting hole extending downward is provided at the bottom of the punching hole on the third mold core, and the inner diameter of the cutting hole is smaller than the inner diameter of the punching hole on the third mold core; The punch on the third die cavity is set to a cylindrical structure, and the end thereof is formed with a head adapted to the cutting hole; The punching holes on the fourth mold core are provided with a cylindrical inner surface, and its depth dimension is greater than the depth dimensions of the punching holes on the other mold cores; the punch in the fourth mold cavity is a cylindrical structure, and its end is provided with a cone.

6. A hardware flanging and tapping device according to claim 1, characterized in that: A fifth mold core is formed on the shaping lower mold, and a receiving hole adapted to the shaping column is arranged on the fifth mold core. The shaping column is coaxially fixedly installed in the receiving hole and extends toward the outside of the receiving hole, and its end is formed into a cylindrical shape.

7. A hardware flanging and tapping device according to claim 6, characterized in that: The receiving hole and the shaping column define a spacing distance that matches the thickness of the hardware strip.

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