Structure for riveting stud on copper bar

Abstract

The utility model discloses a structure for riveting a stud on a copper bar, which is used for riveting the copper bar and the stud, and comprises a base, the upper die part comprises an upper clamping plate and a riveting punch, the upper clamping plate is fixedly connected with the riveting punch, the upper clamping plate is connected with the base through a sliding block, and the upper clamping plate can do reciprocating motion in the first direction so that the riveting punch can do reciprocating motion in the first direction; the lower die part comprises a lower cushion corner, a lower seat plate, a lower knockout plate and a lower die plate, and the lower cushion corner is used for connecting the base and the lower seat plate; the bottom of the lower base plate drives the jigger pin to move in the first direction relative to the lower base plate through cooperation of an equal-height screw and a spring, the lower die plate is fixed to the top of the lower base plate, a lower die insert core is arranged at the position, at the position of a jigger hole, of the lower die plate in a penetrating mode, and an annular area at the top of the lower die insert core comprises an outwards-expanding arc edge. And the outer contour of the head part is matched with the outermost periphery of the arc edge. Through the structure, the copper bar can be efficiently riveted on the stud, and the riveting precision is high.

Description

Technical Field

[0001] The utility model relates to a structure of a copper row rivet stud, belonging to the technical field of processing moulds. Background Art

[0002] The description in this section merely provides background information related to the disclosure of the present utility model and does not constitute prior art.

[0003] The copper busbar of new energy vehicles is a conductive component used to connect power battery packs. Its function is to collect and distribute electricity to meet the power needs of new energy vehicles. Laminated soft copper busbars made of copper or aluminum are usually used, which have good electrical conductivity, thermal conductivity and corrosion resistance. With the development of science and technology, the market now has higher and higher requirements for copper busbar products for new energy vehicles, but at the same time, it also puts forward higher requirements for cost control of copper busbars.

[0004] The copper busbar is a conductive component used to connect core components such as battery packs, motors and electronic controls. It needs to withstand the transmission of high voltage and high current. In order to ensure the stability and reliability of the copper busbar, it needs to be combined with the studs to form a solid structure. This can reduce contact resistance, improve conductivity efficiency, prevent loosening and falling off, and offset the impact of vibration on battery cells and electrical components during vehicle driving. Nowadays, traditional copper busbars and studs are combined by welding, but the cost of general welding is very high, and the welding accuracy often does not meet the requirements. Or some can connect the copper busbar to the stud by riveting, but the steps are complicated and the accuracy is still insufficient. Because the copper busbar is small in size, the copper busbar is squeezed out of shape by the studs during riveting, resulting in size deviation, and the studs are easy to fall off if the torque does not meet the requirements.

[0005] Currently, there is no structure of copper row rivet studs that can solve the above problems. Utility Model Content

[0006] The utility model aims to provide a copper bar rivet stud structure, which can efficiently rivet the copper bar on the stud and has high riveting accuracy.

[0007] In order to achieve the above-mentioned object, the utility model discloses the following structure of a copper bar rivet stud, which is used for riveting a copper bar to a stud, wherein the copper bar comprises a head and a column, and an end of the column away from the head further comprises a hole for accommodating the stud; wherein the head comprises a through hole; and further comprises:

[0008] Base;

[0009] An upper die portion, the upper die portion comprising an upper clamping plate and a riveting punch, the upper clamping plate being fixedly connected to the riveting punch, the upper clamping plate being connected to the base via a slider, and the upper clamping plate being capable of reciprocating along a first direction, so that the riveting punch is capable of reciprocating along the first direction;

[0010] The lower mold part comprises a lower pad angle, a lower seat plate, a lower knockout plate and a lower template, one end of the lower pad angle is fixed on the base, and the other end of the lower pad angle is fixedly connected to the bottom of the lower seat plate; the bottom of the lower seat plate is also fixed with an equal height screw, the equal height screw is passed through the lower knockout plate, and the equal height screw is also sleeved with a spring on one side of the lower knockout plate so that the spring abuts against the equal height screw; a ejection pin is fixed on the lower knockout plate, the stud is arranged at the top of the ejection pin, the diameter of the stud matches the diameter of the through hole, the lower seat plate comprises an ejection hole, the inner diameter of the ejection hole matches the diameter of the column and the ejection pin, and the ejection pin passes through the ejection hole; the lower template is fixed to the top of the lower seat plate, the lower template is passed through a lower mold insert at the ejection hole position, and the annular area on the top of the lower mold insert comprises an outwardly expanded arc edge, and the outer contour of the head matches the outermost periphery of the arc edge.

[0011] Furthermore, the lower mold part also includes a floating positioning pin, one end of which is fixed to the top of the lower knockout plate, and the other end of which protrudes from the top of the lower mold plate along the first direction. The lower seat plate also includes a positioning hole for passing the floating positioning pin, and the diameter of the floating positioning pin matches the inner diameter of the through hole and the positioning hole.

[0012] Furthermore, the top of the floating positioning pin is configured as an outwardly convex cone.

[0013] Furthermore, the lower mold portion also includes a hitting rod, one end of which is fixed to the top of the lower knockout plate, and the other end of the hitting rod protrudes from the top of the lower mold plate along the first direction, and the lower seat plate also includes a hitting rod hole for passing the hitting rod, and the diameter of the hitting rod matches the inner diameter of the hitting rod hole.

[0014] Furthermore, the upper mold part also includes an upper stripping plate, which is arranged at the bottom of the upper clamping plate and is elastically connected to the upper clamping plate; the upper stripping plate includes a punch hole at the position of the riveting punch, and the inner diameter of the punch hole matches the diameter of the riveting punch.

[0015] Furthermore, the spring is arranged on a side of the lower knock-out plate close to the base.

[0016] By means of the above technical solution, the beneficial effects of the utility model are as follows:

[0017] 1. The structure of the copper bar rivet stud of the utility model can directly rivet the copper bar and the stud efficiently through a mold. Compared with the welding of the traditional structure, the utility model can significantly improve the docking accuracy of the copper bar and the stud. At the same time, the same set of structure can be reused in multiple mass production. Compared with welding, it can also effectively reduce costs, save manpower and material resources, and improve output.

[0018] 2. The annular area on the top of the lower die insert of the copper bar rivet stud structure of the utility model includes an outward-expanding arc edge, which can protect the outer contour of the head of the copper bar when the burrs are pressed, and will not cause the copper bar to bulge and deform due to the strong squeezing of the inside of the copper bar by the traditional riveting structure, thereby ensuring the torsion and riveting force of the stud and reducing the cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of this specification or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this specification. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0020] Figure 1 It is a schematic diagram of a mold opening state of a copper bar rivet stud structure provided in an embodiment of this specification;

[0021] Figure 2 It is a schematic diagram of a closed mold state of a copper bar rivet stud structure provided in an embodiment of this specification;

[0022] Figure 3 is a schematic diagram of a copper busbar provided in an embodiment of this specification;

[0023] In the figure: 100, head; 101, through hole; 200, column; 201, hole; 300, stud; 1, base; 2, upper die; 21, upper clamping plate; 22, riveting punch; 23, upper stripping plate; 3, lower die; 31, lower pad angle; 32, lower seat plate; 33, lower knockout plate; 34, lower template; 341, lower die insert; 3411, arc edge; 35, equal height screw; 36, spring; 37, ejector pin; 38, floating positioning pin; 39, hitting rod. DETAILED DESCRIPTION

[0024] In order to enable those skilled in the art to better understand the technical solutions in this specification, the technical solutions in the embodiments of this specification will be clearly and completely described below in conjunction with the drawings in the embodiments of this specification. Obviously, the described embodiments are only part of the embodiments of this specification, not all of the embodiments. Based on the embodiments in this specification, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of this specification.

[0025] In the description of the present utility model, it should be noted that the terms "upper", "middle", "lower", "inner", "outer", "front", "back" and the like indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or component referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present utility model. The terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances. The following describes the implementation method of the present utility model based on its overall structure.

[0026] See also Figure 1-3 , is a structure of a copper bar rivet stud of this embodiment, which is used to rivet the copper bar and the stud 300, wherein the copper bar includes a head 100 and a column 200, and the column 200 further includes a hole 201 for accommodating the stud 300 at one end away from the head 100; wherein the head 100 includes a through hole 101; and further includes:

[0027] Base 1;

[0028] The upper die part 2 includes an upper clamping plate 21 and a riveting punch 22. The upper clamping plate 21 is fixedly connected to the riveting punch 22. The upper clamping plate 21 is connected to the base 1 through a slider, and the upper clamping plate 21 can reciprocate along a first direction, so that the riveting punch 22 can reciprocate along the first direction;

[0029] The lower mold part 3 includes a lower pad angle 31, a lower seat plate 32, a lower knockout plate 33 and a lower mold plate 34. One end of the lower pad angle 31 is fixed to the base 1, and the other end of the lower pad angle 31 is fixedly connected to the bottom of the lower seat plate 32; the bottom of the lower seat plate 32 is also fixed with a height screw 35, the height screw 35 is penetrated on the lower knockout plate 33, and the height screw 35 is also sleeved with a spring 36 on one side of the lower knockout plate 33, so that the spring 36 abuts against the height screw 35; a ejector pin 37 is fixed on the lower knockout plate 33, and a stud 3 00 is arranged on the top of the ejection pin 37, the diameter of the stud 300 matches the diameter of the through hole 101, the lower seat plate 32 includes a ejection hole, the inner diameter of the ejection hole matches the diameter of the column 200 and the ejection pin 37, and the ejection pin 37 passes through the ejection hole; the lower template 34 is fixed on the top of the lower seat plate 32, and the lower template 34 is penetrated by a lower mold insert 341 at the position of the ejection hole, and the annular area on the top of the lower mold insert 341 includes an outward-expanded arc edge 3411, and the outer contour of the head 100 matches the outermost periphery of the arc edge 3411.

[0030] With the above structure, when in use, the staff only needs to place the stud 300 to be riveted on the ejector pin 37 in the lower die part 3, and then place the copper bar column part 200 for riveting toward the stud 300 and on the stud 300. At this time, the structure is in Figure 1 The upper clamping plate 21 in the upper die part 2 can then be driven to drive the riveting punch 22 to impact rivet the head 100 of the copper bar. During the impact process, the riveting punch 22 in the upper die part 2 continuously applies pressure to the top of the head 100, so that the stud 300 is continuously inserted into the hole 201 under the drive of external force. At this time, the copper bar is also continuously moving downward along the first direction with the impact of the upper die part 2. Until the head 100 moves down and touches the position of the arc edge 3411, by means of the preset arc edge 3411 structure, under the impact of the riveting punch 22, the head 100 begins to deform from the bottom to the style of the arc edge 3411. At this point, the peripheral burrs on the bottom side of the head 100 are effectively protected, and the burrs are realized during the riveting process. Compared with the traditional riveting method without the above process, this embodiment not only directly realizes the burrs during the riveting process, but also can achieve higher riveting accuracy through the positioning effect of the arc edge 3411. At the same time, since the arc edge 3411 has a certain error tolerance in the direction perpendicular to the first direction, the riveting accuracy of the head 100 is further improved during the riveting process. When the riveting is completed, the stud 300 is completely riveted into the hole 201. At this time, the embodiment is in Figure 2In the above process, the lower knockout plate 33 also moves downward under the push of the ejector pin 37, and the lower knockout plate 33 slides downward relative to the equal height screw 35 along the first direction, so that the spring 36 on the equal height screw 35 is compressed to a tight state by the lower knockout plate 33. Finally, the staff closes the impact of the riveting punch 22 on the head 100 and raises the upper die 2. At this time, since the spring 36 is released from the tight state, the copper bar after riveting can be ejected from the lower die 3, and the staff can easily take out the finished product.

[0031] Furthermore, if Figure 3 As shown, the head 100 of the copper busbar is set as a flat irregular sheet structure, and the head 100 includes a plurality of engineering holes for inserting parts, including a through hole 101 for positioning, so that the head 100 of the copper busbar can be accurately sleeved in this structure, improving the operating accuracy of the staff. The column 200 of the copper busbar is set as a cylindrical body with a length along the first direction much greater than the thickness of the head 100. The center position of the head 100 includes a through hole 101 coaxial with the head 100. The inner diameter size of the through hole 101 is preset to match the diameter of the stud 300 to be riveted, so as to facilitate subsequent riveting.

[0032] like Figure 1-2 As shown, the base 1 is a general mold lower support plate, which is mainly used to clamp the mold with the upper mold part 2 or the lower mold part 3 of the press work table. It is located directly below the overall structure. The size of the base 1 is built according to the size of the lower mold part 3, and the support of the upper structure is achieved through multiple lower pad angles 31 located at the edge of the base 1. The base 1 is generally made of steel plate or cast iron. Of course, in another embodiment, if there is no special function, the base 1 can be omitted, and the lower pad angles 31 of the upper structure can be directly supported on a machine tool or other special equipment, which can also realize the riveting function of the present structure. In the upper mold part 2, the riveting punch 22 is set as a cylinder, and the diameter of the riveting punch 22 is slightly larger than the diameter of the column 200, so that during the impact of the riveting punch 22 on the copper bar, the column 200 can achieve uniform force. In this embodiment, the lower mold part 3 includes two sets of lower pad angles 31, which are arranged on both sides of the base 1 in a mirror-symmetrical manner. The two lower pad angles 31 are used to support the lower seat plate 32 above the base 1 in a balanced manner. The tail end of the equal height screw 35 is embedded and fixed in the lower seat plate 32, and its main part is placed vertically along the first direction, and is respectively penetrated by the lower knockout plate 33 and the spring 36. Figure 1In the mold opening state shown, the spring 36 can also push the lower knockout plate 33 to contact the bottom of the lower seat plate 32 to avoid wear of the structural parts caused by the drooping and shaking of the lower knockout plate 33. When the riveting is completed, the spring 36 is compressed and in a fully taut state, and the spring 36 has a smaller volume so as not to hinder the riveting punch 22 from completely pressing the head 100 of the copper bar into the lower mold insert 341. In this embodiment, the spring is arranged on the side of the lower knockout plate 33 close to the base 1, so that the spring 36 can be replaced more easily. In another embodiment, the spring can also be arranged on the side of the lower knockout plate 33 away from the base 1. That is to say, in Figure 1 In the mold opening state, the spring 36 is retracted and in a completely relaxed state. Figure 2 In the mold-closing state, the spring can be pulled to the longest length by the lower knock-out plate 33. The bottom of the ejector pin 37 is fixed to the top of the lower knock-out plate 33, and the ejector pin 37 is configured as a column extending along the first direction. The diameter of the ejector pin 37 is larger than the diameter of the stud 300, so that the ejector pin 37 can provide a stable supporting effect on the stud 300. In another embodiment, a lower pad is further included between the lower seat plate 32 and the lower seat plate 32. The size of the lower pad matches that of the lower seat plate 32 and the lower seat plate 32. The lower pad is made of a plate-like material with high hardness and wear resistance made by heat treatment, in order to prevent the lower template 34 from being dented during the riveting process, thereby affecting the accuracy and stability of the riveting process.

[0033] Furthermore, if Figure 1-2 As shown, the lower mold part 3 also includes a floating positioning pin 38, one end of which is fixed to the top of the lower knockout plate 33, and the other end of the floating positioning pin 38 protrudes from the top of the lower mold plate 34 along the first direction. The lower seat plate 32 also includes a positioning hole for passing the floating positioning pin 38, and the diameter of the floating positioning pin 38 matches the inner diameter of the through hole and the positioning hole. Specifically, the top of the floating positioning pin 38 is set as an outwardly convex cone. After the through hole 101 of the head 100 is sleeved on the cone, since the cone and the floating positioning pin 38 are coaxially arranged, the head 100 can be accurately positioned during the process of sleeved or pressed down, avoiding processing failures caused by deviations in the placement position of the head 100, and further improving the processing yield of this embodiment.

[0034] Furthermore, the lower mold portion 3 also includes a hitting rod 39, one end of which is fixed to the top of the lower knockout plate 33, and the other end of the hitting rod 39 protrudes from the top of the lower mold plate 34 along the first direction. The lower seat plate 32 also includes a hitting rod hole for passing the hitting rod 39, and the diameter of the hitting rod 39 matches the inner diameter of the hitting rod hole. Specifically, the setting of the hitting rod 39 mainly plays a role in transmitting force between the upper mold portion 2 and the lower mold portion 3. When the upper mold portion 2 is pressed downward, the upper release plate 23 in the upper mold portion 2 abuts against the head of the hitting rod 39 and applies pressure to the hitting rod 39. At this time, since the other end of the hitting rod 39 is connected to the top of the lower knockout plate 33 at the bottom, the pressure of the upper mold portion 2 on the hitting rod 39 can be converted into the pressure of the lower knockout plate 33 on the spring 36, and the spring 36 is deformed. At the same time, it should be noted that the length of the hitting rod 39 along the first direction just satisfies the following conditions: Figure 3 The dimension flush with the head 100 after riveting is shown, so that the striking rod 39 can effectively avoid damage to the structure of this embodiment caused by excessive impact force, protect the service life of the device, and make the movement of the lower striking plate 33 more balanced and stable during the impact process.

[0035] Furthermore, the upper die part 2 further includes an upper stripping plate 23, which is arranged at the bottom of the upper clamping plate 21 and is elastically connected to the upper clamping plate 21; the upper stripping plate 23 includes a punch hole at the position of the riveting punch 22, and the inner diameter of the punch hole matches the diameter of the riveting punch 22. By coordinating the upper stripping plate 23 with the upper clamping plate 21, the upper stripping plate 23 can replace the riveting punch 22 to achieve a partial stage of material pressing during the impact process, and play a certain buffering role, further protecting the structure of the upper clamping plate 21 and the riveting punch 22, and making the riveting process smoother.

[0036] The present invention uses specific embodiments to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only used to help understand the method and core idea of ​​the present invention. At the same time, for those skilled in the art, according to the idea of ​​the present invention, there will be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as a limitation on the present invention.

Claims

1. A copper bar rivet stud structure, used for riveting a copper bar to a stud, wherein: The copper busbar comprises a head and a column, and an end of the column away from the head further comprises a hole for accommodating the stud; the feature is that the head comprises a through hole; and further comprises: Base; An upper die portion, the upper die portion comprising an upper clamping plate and a riveting punch, the upper clamping plate being fixedly connected to the riveting punch, the upper clamping plate being connected to the base via a slider, and the upper clamping plate being capable of reciprocating along a first direction, so that the riveting punch is capable of reciprocating along the first direction; The cam is secured to the bottom of the mould by a spring which is secured on the top of the mould and has a camming mechanism which allows the mould to move freely in the cavity when the camming member is in the camming cavity.

2. The structure of the copper bar rivet stud according to claim 1 is characterized in that: The lower mold part also includes a floating positioning pin, one end of which is fixed to the top of the lower knockout plate, and the other end of which protrudes from the top of the lower mold plate along the first direction. The lower seat plate also includes a positioning hole for passing the floating positioning pin, and the diameter of the floating positioning pin matches the inner diameter of the through hole and the positioning hole.

3. The structure of the copper bar rivet stud according to claim 2 is characterized in that: The top of the floating positioning pin is configured as an outwardly convex cone.

4. The structure of the copper bar rivet stud according to claim 1 is characterized in that: The lower mold part also includes a hitting rod, one end of which is fixed to the top of the lower knockout plate, and the other end of the hitting rod protrudes from the top of the lower mold plate along the first direction. The lower seat plate also includes a hitting rod hole for passing the hitting rod, and the diameter of the hitting rod matches the inner diameter of the hitting rod hole.

5. The structure of the copper bar rivet stud according to claim 1 is characterized in that: The upper mold part also includes an upper stripping plate, which is arranged at the bottom of the upper clamping plate and is elastically connected to the upper clamping plate; the upper stripping plate includes a punch hole at the position of the riveting punch, and the inner diameter of the punch hole matches the diameter of the riveting punch.

6. The structure of the copper bar rivet stud according to claim 1, characterized in that: The spring is arranged on one side of the lower striking plate close to the base.

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