CN216262988U - Riveting die - Google Patents

Abstract

The utility model discloses a riveting die which sequentially comprises a first die, a second die, a third die and a fourth die which are respectively positioned on corresponding stations, wherein the first die is used for punching a mounting groove on a material belt; the second die is used for bending two end parts of the silver sheet along the width direction; the third die is used for feeding the bent silver sheet into the mounting groove and respectively punching fixing grooves at two ends of the mounting groove; and the fourth die is used for extruding the two fixing grooves, so that the side surfaces, close to the mounting groove, of the fixing grooves press the bending parts of the silver sheets. According to the riveting die, the silver sheet is directly riveted on the material belt in the terminal stamping process, and the terminal stamping and the silver sheet riveting can be completed through only one process, so that the silver sheet is prevented from being misplaced or missed, the defective rate is reduced, the production efficiency of the terminal is improved, and the labor force is saved.

Description

Riveting die

Technical Field

The utility model relates to the technical field of solder riveting on terminals, in particular to a riveting die.

Background

With the development and popularization of new energy automobiles, automobile electronic products are more and more widely used, and the automobile electronic products cannot be used for signal transmission of weak current and current transmission of strong current. The copper terminal embedded plastic injection molding which is developed along with the development is also developed rapidly, and the use amount of the embedded injection molding part on the automobile electronic product is larger by utilizing the excellent electric conductivity of the copper terminal, the insulating property of the plastic and the possibility of designing and molding complex products. Meanwhile, the modularization degree of automobile electronic products is higher and higher, the transmitted current of the automobile after being electrified is larger and larger, the automobile is in severe environments such as vibration and high temperature during operation, and the reliability problem of electrical connection between the two modules is solved. The use of resistance welding to weld the terminals of the two modules is a common connection method. To increase the reliability, solder (small pieces cut from a silver-containing coil) is often added between the two bonding surfaces to enhance the peel force between the two bonded terminals. At present, the method of attaching the solder to the terminal is relatively popular, and a process is additionally added after the terminal is stamped and produced, so that the solder is brazed on the terminal, and time and labor are wasted.

SUMMERY OF THE UTILITY MODEL

In view of the above, in order to overcome the defects of the prior art, the present invention provides a riveting die capable of directly riveting a solder onto a material tape, so as to solve the problems of low production efficiency and increased labor consumption caused by an additional process for soldering the solder after a terminal is stamped in the prior art.

In order to achieve the purpose, the utility model adopts the following technical scheme:

the utility model provides a riveting die which is used for directly riveting a silver sheet on a material belt in the process of punching a terminal on the material belt, wherein the riveting die sequentially comprises a first die, a second die, a third die and a fourth die which are respectively positioned on corresponding stations, and the first die is used for punching an installation groove on the material belt; the second die comprises two upper bending pieces and two lower bending pieces, the bottom ends of the two upper bending pieces are matched with the bottom end of the lower bending piece, and the second die is used for bending two end parts of the silver sheet along the width direction; the third die comprises a cutting piece and first upper die pieces positioned on two sides of the cutting piece, and the third die is used for feeding the bent silver piece into the mounting groove and respectively punching fixing grooves at two ends of the mounting groove; the fourth die comprises two second upper die parts, and the fourth die is used for extruding the two fixing grooves to enable the side faces, close to the mounting grooves, of the fixing grooves to tightly press the bending parts of the silver sheets.

According to some preferred embodiments of the present invention, the lower end of the first die is provided with a first die portion, the first die portion includes a first portion and first protrusions respectively located at two ends of the first portion, a height of the first portion is smaller than a height of the first protrusions, a length of the first portion is smaller than a distance between the two first protrusions, a first inclined plane is provided between a side edge of the first portion close to the corresponding first protrusion and a side edge of the first protrusion close to the first portion, and the first die portion is used for punching the mounting groove on the material strip. In some embodiments of the present invention, the material of the material strip is copper, and the terminal is obtained by stamping on the copper material strip. And in the process of stamping the terminal by using the first stamping part of the first die, a mounting groove with certain depth and size is pre-stamped on the copper strip, and the shape and the size of the mounting groove are the same as those of the first stamping part.

According to some preferred implementation aspects of the present invention, two of the upper bending pieces are correspondingly arranged, a second protruding block is arranged at a lower end of each of the upper bending pieces, each of the second protruding blocks includes a second inclined surface, and a cross section of each of the second protruding blocks is a right trapezoid; the upper end of the lower bending piece is provided with a third bump, the third bump comprises two third inclined planes, and the two third inclined planes are respectively close to the two second inclined planes. The silver belt is placed between the upper bending piece and the lower bending piece of the second die, the two ends of the silver belt in the width direction are bent through extrusion between the upper bending piece and the lower bending piece, and the bending position is located between a second inclined surface of a second convex block of the upper bending piece and a third inclined surface of a third convex block of the lower bending piece. The bent part can extend into the mounting groove, so that the fitting degree between the bent part and the mounting groove is increased during riveting.

According to some preferred implementation aspects of the present invention, the second inclined surfaces are parallel to the corresponding third inclined surfaces, and a distance between two side edges of the two second inclined surfaces, which are close to the upper end of the upper bending piece, is less than a length of a top surface of the third protrusion. The second inclined plane is parallel to the corresponding third inclined plane, and is for forming complete bending part, if the second inclined plane is not parallel to the third inclined plane, when bending the silver ribbon end, the intersection point of the second inclined plane and the third inclined plane may cause the bent part to be broken by pressing, or the bent part is bent again, which causes the bent part not to match with the mounting groove and can not be riveted. The distance between two sides of two second inclined planes near the upper end of the upper bending piece is smaller than the length of the top surface of the third lug, so that the two second lugs of the upper bending piece can limit the bent silver strip, and the bent silver strip is prevented from directly sliding out from the upper space between the two second lugs.

According to some preferred embodiments of the present invention, an acute angle formed between the first slope and a plane in which the bottom surface of the first protrusion is located, and an acute angle formed between the second slope and a plane in which the bottom surface of the second protrusion is located are both 44.9 to 45.1 °. In some embodiments of the present invention, the acute angle formed between the first inclined plane and the plane where the bottom surface of the first bump is located and the acute angle formed between the second inclined plane and the plane where the bottom surface of the second bump is located are both 45 °, and accordingly, the inclination angle of the bending portion obtained by bending the silver strip through the second die is also 45 °, and the inclination angle of the mounting groove formed on the silver strip through the first stamping portion is also 45 °, so that the two are matched with each other, and the riveting is facilitated.

According to some preferred embodiments of the present invention, two of the first upper mold pieces are correspondingly disposed, a lower end of each of the first upper mold pieces is provided with a fourth bump, a cross section of the fourth bump is trapezoidal, and a distance between the two fourth bumps is greater than a distance between the two first bumps; the length of the bottom surface of the cutting piece is greater than or equal to the distance between the two first bumps. The cutting piece is arranged for cutting the bent silver belt to form silver sheets with the length and the width matched with the size of the corresponding mounting groove; in addition, the top end of the cutting piece is also provided with a spring, and after cutting, the cutting piece further presses the silver sheet into the mounting groove directly from the right upper side of the mounting groove through the pressure of the spring. The two first upper die members are respectively positioned at two sides of the cutting member, and fixing grooves are punched at two sides of the punched mounting groove on the material belt through the two fourth convex blocks. In some embodiments of the utility model, the length of the bottom surface of the cut piece is greater than the distance between the two first bumps, that is, the length of the bottom surface of the cut piece is greater than the distance between the bent parts at the two ends of the silver sheet, so that the cut piece can be completely pressed in the silver sheet when the cut silver sheet is pressed into the mounting groove, and the pressing in is prevented from being uneven.

According to some preferred implementation aspects of the utility model, the fourth mold comprises a pressing piece, and the length of the bottom surface of the pressing piece is greater than or equal to the distance between the two first lugs; the two second upper die pieces are correspondingly arranged, a fifth bump is arranged at the lower end part of each second upper die piece, and the distance between the two fifth bumps is larger than the distance between the two first bumps. In some embodiments of the utility model, the length of the bottom surface of the pressing part is equal to the distance between the two first bumps, so that the silver sheet is completely compacted in the mounting groove and further compacted, and the silver sheet is prevented from being pressed unevenly, so that the riveting is not successful. The corresponding fixing grooves are extruded through the two fifth convex blocks of the two second upper die pieces, so that the inclined planes of the fixing grooves close to the mounting grooves incline to the bending positions of the silver sheets, the fixing grooves are tightly pressed on the upper surfaces of the bending positions, and the riveting firmness of the silver sheets is improved.

According to some preferred embodiments of the present invention, the strip material mounting device comprises a fifth die, a second die part is arranged at a lower end of the fifth die, the second die part comprises a second part and sixth bumps respectively located at two ends of the second part, the height of the second part is greater than the height of the sixth bumps and greater than the height of the first part, the height of the sixth bumps is greater than the height of the first bumps, the length of the second part is less than the distance between two sixth bumps, and the second die part is used for deepening the mounting groove on the strip material. In some embodiments of the utility model, the tape pre-stamping device further comprises a fifth die, wherein the fifth die is used for performing fine stamping on the tape by using a second die part of the fifth die to form a deepening groove after the mounting groove is pre-stamped on the tape by using the first die, so that the situation that the depth of the mounting groove is insufficient or the shape of a complete mounting groove is not completely formed during the first pre-stamping is avoided. A sixth inclined plane is arranged between the side edge of the second part close to the corresponding sixth bump and the side edge of the sixth bump close to the second part; the angle of the acute angle formed between the sixth slope and the horizontal plane on which the top surface of the sixth bump is located is also 45 °.

According to some preferred aspects of the present invention, the fourth protrusion includes a fourth slope, and the fifth protrusion includes a fifth slope, a length of the fifth slope being greater than a length of the fourth slope; when the fifth bump is located in the fixing groove, the length of the fifth inclined plane is greater than the distance between one end, away from the mounting groove, of the fifth inclined plane and one end, away from the fixing groove, of the corresponding bending portion of the silver sheet. The length and the position of the fifth inclined plane are arranged so as to ensure that the fifth inclined plane can be completely pressed on the upper surface of the bending part when the fifth inclined plane is pressed down to the bending part of the silver piece, so that the fastness of the riveting of the silver piece in the deepening groove is ensured, and the silver piece is prevented from falling. In some embodiments of the utility model, the angle of the acute angle formed between the fourth slope and the horizontal plane is 50.1-50.3 °, preferably 50.2 °; the angle between the fifth bevel and the horizontal plane forms an acute angle of 42.9-43.1 deg., preferably 43 deg..

Compared with the prior art, the method has the advantages that: according to the riveting die, the first die, the second die, the third die and the fourth die are arranged on different stations, so that silver sheets are directly riveted on the material belt in the terminal stamping process, terminal stamping and silver sheet riveting can be completed through one process, misplacement or omission of the silver sheets is avoided, the defective rate is reduced, the production efficiency of the terminal is improved, and labor is saved.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

FIG. 1 is a cross-sectional view of a first mold in a preferred embodiment of the utility model;

FIG. 2 is an enlarged view taken at A in FIG. 1;

FIG. 3 is a cross-sectional view of a second mold in a preferred embodiment of the utility model;

FIG. 4 is an enlarged view at B in FIG. 3;

FIG. 5 is a cross-sectional view of a third mold in a preferred embodiment of the utility model;

FIG. 6 is an enlarged view at C of FIG. 5;

FIG. 7 is a cross-sectional view of a fourth mold in accordance with a preferred embodiment of the present invention;

FIG. 8 is an enlarged view taken at D in FIG. 7;

FIG. 9 is a cross-sectional view of a fifth mold in accordance with a preferred embodiment of the present invention;

FIG. 10 is an enlarged view at E in FIG. 9;

FIG. 11 is a cross-sectional view of the strip material after being punched with a mounting groove in accordance with a preferred embodiment of the present invention;

FIG. 12 is a cross-sectional view of the strip of FIG. 11 after stamping a groove in the strip;

fig. 13 is a cross-sectional view of the tape of fig. 12 after punching a securing groove therein;

in the drawings: a first die-1, a first punching die part-11, a first part-111, a first bump-112, a first inclined plane-113, a second die-2, an upper bending piece-21, a second bump-211, a second inclined plane-212, a lower bending piece-22, a third bump-221, a third inclined plane-222, a third die-3, a cutting piece-31, a first upper die-32, a fourth bump-321, a fourth inclined plane-322, a carrying table-33, a fourth die-4, a pressing piece-41, a second upper die-42, a fifth bump-421, a fifth inclined plane-422, a fifth die-5, a second punching die part-51, a second part-511, a sixth bump-512, a sixth inclined plane-513 and a silver sheet-6, a material belt-7, a mounting groove-8, a deepened groove-9 and a fixed groove-10.

Detailed Description

In order to make those skilled in the art better understand the technical solution of the present invention, the technical solution in the embodiment of the present invention will be clearly and completely described below with reference to the drawings in the embodiment of the present invention, and it is obvious that the described embodiment is only a part of the embodiment of the present invention, and not a whole embodiment. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

The embodiment provides a riveting die for directly riveting a silver sheet on a copper strip in a terminal stamping process. Referring to fig. 1-10, the riveting mold of the present embodiment includes a first mold 1, a second mold 2, a third mold 3, a fourth mold 4, and a fifth mold 5, where each mold is located on a corresponding station. The first die 1 is used for punching a mounting groove 8 on the material belt 7; the second die 2 is used for bending two end parts of the silver sheet 6 along the width direction; the fifth die 5 is used for further punching on the basis of the mounting groove 8 to obtain a deepening groove 9; the third die 3 is used for feeding the bent silver sheet 6 into the mounting groove 8 and respectively punching fixing grooves 10 at two ends of the mounting groove 8; the fourth die 4 is used for extruding the two fixing grooves 10, so that the side faces, close to the mounting groove 8, of the fixing grooves 10 are pressed against the upper surfaces of the bent parts of the silver sheets 6. The material strip 7 of this embodiment is made of copper, and the copper terminals can be obtained by stamping the copper material strip 7.

As shown in fig. 1-2 and 11, the lower end of the first die 1 is provided with a first die part 11, and the first die part 11 includes a first part 111 and first protrusions 112 respectively located at two ends of the first part 111. The copper strip 7 is pre-punched through the first punching part 11 to obtain a mounting groove 8, and the mounting groove 8 is matched with the first punching part 11. Wherein, the height of the first bump 112 is 0.35mm, the height of the first portion 111 is less than the height of the first bump 112, and the length of the first portion 111 is less than the distance between two first bumps 112; a first inclined surface 113 is arranged between the side edge of the first part 111 close to the corresponding first bump 112 and the side edge of the first bump 112 close to the first part 111, and an acute angle formed between the first inclined surface 113 and a plane where the bottom surface of the first bump 112 is located is 45 degrees.

As shown in fig. 3 to 4 and 12, the lower end portion of the fifth die 5 is provided with a second die portion 51, and the second die portion 51 includes a second portion 511 and sixth protrusions 512 respectively located at both ends of the second portion 511. The second punching die part 51 is used for fine trimming punching on the basis of the mounting groove 8 to obtain a deepened groove 9, and the deepened groove 9 is matched with the second punching die part 51. Wherein, the height of the sixth bump 512 is 0.355mm, the height of the second portion 511 is greater than the height of the sixth bump 512 and greater than the height of the first portion 111, the height of the sixth bump 512 is greater than the height of the first bump 112, and the length of the second portion 511 is less than the distance between two sixth bumps 512; a sixth inclined surface 513 is arranged between the side edge of the second portion 511 close to the corresponding sixth bump 512 and the side edge of the sixth bump 512 close to the second portion 511; the angle formed between the sixth slope 513 and the horizontal plane on which the top surface of the sixth protrusion 512 is located is also 45 °.

As shown in fig. 5-6, the second mold 2 includes two upper bending pieces 21 and two lower bending pieces 22, which are correspondingly disposed, and bottom ends of the two upper bending pieces 21 are matched with bottom ends of the lower bending pieces 22. A second bump 211 is arranged at the lower end of the upper bending piece 21, the cross section of the second bump 211 is a right trapezoid, and the second bump 211 comprises a second inclined surface 212; the upper end of the lower bending piece 22 is provided with a third bump 221, the third bump 221 includes two third inclined surfaces 222, the two third inclined surfaces 222 are respectively close to the two corresponding second inclined surfaces 212, the second inclined surfaces 212 are parallel to the corresponding third inclined surfaces 222, and the distance between the two side edges of the two second inclined surfaces 212 close to the upper end of the upper bending piece 21 is less than the length of the top surface of the third bump 221. The acute angles formed between the second inclined surface 212 and the plane where the bottom surfaces of the second bumps 211 are located are 45 °, and the two ends of the silver ribbon in the width direction are bent by mutual extrusion between the two second bumps 211 and the third bump 221.

As shown in fig. 7-8 and 13, the third mold 3 comprises a cut piece 31, first upper mold pieces 32 on both sides of the cut piece 31, and a platform 33 for placing the silver strip, and a spring is arranged at the end of the cut piece 31 far away from the silver strip. Cutting the bent silver strip by using a cutting piece 31 to form a silver sheet 6 with the length and the width matched with the size of the deepened groove 9; after the cutting, the cut piece 31 further presses the silver piece 6 into the mounting groove 8 directly from directly above the mounting groove 8 by the pressure of the spring. The two first upper mold parts 32 are correspondingly arranged, the lower end part of each first upper mold part 32 is provided with a fourth bump 321, the cross section of each fourth bump 321 is trapezoidal, each fourth bump 321 comprises a fourth inclined plane 322, and the angle of an acute angle formed between each fourth inclined plane 322 and the horizontal plane is 50.2 degrees; the height of the fourth bump 321 is 0.301mm, the length of the bottom surface of the cut piece 31 is greater than the distance between the two first bumps 112, that is, the length of the bottom surface of the cut piece 31 is greater than the distance between the bent parts at two ends of the silver sheet 6, so that the cut piece 31 is ensured to be pressed into the mounting groove 8 smoothly after the cut silver sheet 6 is cut.

As shown in fig. 9 to 10, the fourth mold 4 includes a press-in member 41 and second upper mold members 42 disposed correspondingly on both sides of the press-in member 41. The lower end of each second upper mold member 42 is provided with a fifth projection 421, the height of the fifth projection 421 is 0.309mm, and the distance between two fifth projections 421 is greater than the distance between two first projections 112, i.e. the mounting groove 8 is located between two fixing grooves 10. Wherein the length of the bottom surface of the pressing member 41 is equal to the distance between the two first protrusions 112. In this embodiment, the fifth protrusion 421 includes a fifth inclined surface 422, and an acute angle formed between the fifth inclined surface 422 and a horizontal plane is 43 °; the length of the fifth slope 422 is greater than the length of the fourth slope 322; when fifth lug 421 is located fixed slot 10, the length on fifth inclined plane 422 is greater than the distance between the one end that fixed slot 10 was kept away from to the portion of bending of corresponding silver sheet 6 to the one end that mounting groove 8 was kept away from to fifth inclined plane 422, guarantees that fifth inclined plane 422 can press completely on the upper surface at the position of bending when falling to the position of bending of silver sheet 6, guarantees the fastness of silver sheet 6 riveting in deepening groove 9, avoids silver sheet 6 to drop.

The above embodiments are merely illustrative of the technical concept and features of the present invention, and the purpose thereof is to enable those skilled in the art to understand the content of the present invention and implement the utility model, and not to limit the scope of the utility model, and all equivalent changes or modifications made according to the spirit of the present invention should be covered by the scope of the present invention.

Claims (10)

1. A riveting die is used for directly riveting a silver sheet to a material belt in the process of punching a terminal on the material belt, and is characterized by sequentially comprising a first die, a second die, a third die and a fourth die which are respectively positioned on corresponding stations, wherein the first die is used for punching an installation groove on the material belt; the second die comprises two upper bending pieces and two lower bending pieces, the bottom ends of the two upper bending pieces are matched with the bottom end of the lower bending piece, and the second die is used for bending two end parts of the silver sheet along the width direction; the third die comprises a cutting piece and first upper die pieces positioned on two sides of the cutting piece, and the third die is used for feeding the bent silver piece into the mounting groove and respectively punching fixing grooves at two ends of the mounting groove; the fourth die comprises two second upper die parts, and the fourth die is used for extruding the two fixing grooves to enable the side faces, close to the mounting grooves, of the fixing grooves to tightly press the bending parts of the silver sheets.

2. The riveting die of claim 1, wherein the lower end of the first die is provided with a first die part, the first die part comprises a first part and first protrusions respectively located at two ends of the first part, the height of the first part is smaller than that of the first protrusions, the length of the first part is smaller than the distance between the two first protrusions, a first inclined surface is arranged between the side edge of the first part close to the corresponding first protrusion and the side edge of the first protrusion close to the first part, and the first die part is used for punching the mounting groove in the material belt.

3. The riveting die according to claim 2, wherein the two upper bending pieces are arranged correspondingly, the lower end parts of the upper bending pieces are provided with second convex blocks, the second convex blocks comprise second inclined planes, and the cross sections of the second convex blocks are right trapezoid; the upper end of the lower bending piece is provided with a third bump, the third bump comprises two third inclined planes, and the two third inclined planes are respectively close to the two second inclined planes.

4. The riveting die of claim 3, wherein the second slopes are parallel to the corresponding third slopes, and the distance between two side edges of the two second slopes close to the upper end of the upper bending piece is smaller than the length of the top surface of the third bump.

5. The riveting die of claim 4, wherein the acute angle formed between the first bevel and the plane of the bottom surface of the first protrusion and the acute angle formed between the second bevel and the plane of the bottom surface of the second protrusion are both 44.9-45.1 °.

6. The riveting die of claim 2, wherein two first upper die pieces are correspondingly arranged, a fourth bump is arranged at the lower end part of each first upper die piece, the cross section of each fourth bump is trapezoidal, and the distance between the two fourth bumps is larger than the distance between the two first bumps; the length of the bottom surface of the cutting piece is greater than or equal to the distance between the two first bumps.

7. The riveting die of claim 6, wherein the fourth die comprises a press-in piece, the length of the bottom surface of the press-in piece being greater than or equal to the distance between two first projections; the two second upper die pieces are correspondingly arranged, a fifth bump is arranged at the lower end part of each second upper die piece, and the distance between the two fifth bumps is larger than the distance between the two first bumps.

8. The riveting die of claim 7, comprising a fifth die, wherein the lower end of the fifth die is provided with a second punching part, the second punching part comprises a second part and sixth bumps respectively positioned at two ends of the second part, and the second punching part is used for deepening the mounting groove on the material belt.

9. The riveting die of claim 8, wherein the height of the second portion is greater than the height of the sixth bump and greater than the height of the first portion, the height of the sixth bump is greater than the height of the first bump, and the length of the second portion is less than the distance between two of the sixth bumps.

10. The riveting die of claim 9, wherein the fourth tab comprises a fourth bevel, the fifth tab comprises a fifth bevel, the length of the fifth bevel being greater than the length of the fourth bevel; when the fifth bump is located in the fixing groove, the length of the fifth inclined plane is greater than the distance between one end, away from the mounting groove, of the fifth inclined plane and one end, away from the fixing groove, of the corresponding bending portion of the silver sheet.

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