阅读说明：本技术 一种超载跳打焊接螺母冷镦全尺寸成型设备 (Full-size forming equipment of overload jump welded nut cold-heading ) 是由 孙德明 于 2020-12-31 设计创作，主要内容包括：本发明公开的一种超载跳打焊接螺母冷镦全尺寸成型设备,包括：机架；安装在所述机架的剪料工位处的线模；安装在所述机架的剪料工位处的送料驱动机构；安装在所述机架的剪料工位处的用于对所述盘圆送出的线材进行冲剪的冲剪头机构；分别安装在所述机架的每一冲压工位处的主模；分别安装在所述机架的每一冲压工位处的冲模；安装在所述机架上的冲压驱动机构；安装在所述机架上的夹爪机构；以及PLC控制系统,所述PLC控制系统分别与所述送料驱动机构、冲剪头机构、冲压驱动机构和夹爪机构连接。本发明将原先的连续送料方式改为间隔送料方式,满足相应冷却成型设备许用冷镦力的生产范围,满足焊接螺母的冷镦成型工艺的生产要求。(The invention discloses cold heading full-size forming equipment for overload jump welded nuts, which comprises the following steps: a frame; the wire die is arranged at a material shearing station of the rack; the feeding driving mechanism is arranged at a material shearing station of the rack; the punching and shearing head mechanism is arranged at a material shearing station of the rack and is used for punching and shearing the wire rods sent out by the wire rods; the main die is respectively arranged at each stamping station of the rack; the stamping dies are respectively arranged at each stamping station of the frame; the stamping driving mechanism is arranged on the rack; the clamping jaw mechanism is mounted on the rack; and the PLC control system is respectively connected with the feeding driving mechanism, the punching and shearing head mechanism, the punching driving mechanism and the clamping jaw mechanism. The invention changes the original continuous feeding mode into the interval feeding mode, meets the production range of allowable cold heading force of corresponding cooling forming equipment, and meets the production requirement of the cold heading forming process of the welded nut.)

1. The utility model provides an overload jump welding nut cold-heading full-size former which characterized in that includes:

the device comprises a rack, a feeding device and a control device, wherein the rack is divided into a material shearing station and a plurality of stamping stations at intervals along the feeding direction;

the wire die is arranged at a material shearing station of the rack and used for installing a wire rod coiled wire die;

the feeding driving mechanism is arranged at a material shearing station of the rack and used for driving the disc to feed at intervals;

the punching and shearing head mechanism is arranged at a material shearing station of the rack and is used for punching and shearing the wire rods sent out by the wire rods;

the main die is respectively arranged at each stamping station of the frame and is provided with a die cavity for placing a workpiece;

the stamping dies are respectively arranged at each stamping station of the rack, and each stamping die is provided with a stamping rod;

the stamping driving mechanism is arranged on the frame and used for driving each stamping die to stamp towards the direction of the main die corresponding to the stamping die;

the clamping jaw mechanism is arranged on the rack and used for clamping the workpiece and conveying the workpiece to the next station; and

and the PLC control system is respectively connected with the feeding driving mechanism, the punching and shearing mechanism, the punching driving mechanism and the clamping jaw mechanism.

2. The apparatus of claim 1, wherein the feed drive mechanism comprises:

the connecting main shaft is axially arranged on the rack, and one end of the connecting main shaft is connected with the disc;

the feeding ratchet wheel is sleeved on the other end of the connecting main shaft, and a plurality of ratchets are formed on the peripheral surface of the feeding ratchet wheel at uniform intervals in the axial direction;

the unidirectional high-low tooth ratchet wheel is sleeved on the other end of the connecting main shaft and abuts against the feeding ratchet wheel, a plurality of low teeth and a plurality of high teeth which are distributed in a staggered mode are formed on the peripheral surface of the unidirectional high-low tooth ratchet wheel at intervals in the circumferential direction, and the tooth depth of the second low teeth is consistent with the tooth depth of the ratchet;

the pawl is arranged on the rack and positioned above the feeding ratchet wheel and the unidirectional high-low tooth ratchet wheel; and

and the pawl driving mechanism is arranged on the rack and connected with the PLC control system and is used for driving the pawl to stir the feeding ratchet wheel and the unidirectional high-low tooth ratchet wheel.

Technical Field

The invention relates to the technical field of automobile part manufacturing processes, in particular to cold heading full-size forming equipment for overload jump welded nuts.

Background

Presently, weld nuts are a particularly important automotive fastener in the automotive industry. The existing welding nut has two forming processes, one is that cold heading blank is adopted to carry out filling drilling processing or turning plane lathing, the filling processing wastes working hours, the preparation cost is increased, the efficiency is relatively low, the production period is long, the size is difficult to guarantee, the quality stability is poor, the blank flow lines are cut off, the mechanical strength of a workpiece is influenced, and the workpiece is easy to crack under stress after assembly, so that the workpiece fails. And the other method adopts a continuous cold stamping die for forming, the process has high die cost, can generate waste materials such as blank holders, intermediate holes and the like, and the waste materials account for more than 60 percent of raw materials, have the material utilization rate of less than 40 percent and have high preparation cost.

In order to solve the technical problem, the welding nut is machined and formed by adopting a cold heading process at present. Referring to fig. 1, a cold heading forming process of a weld nut is shown, which comprises the following steps:

step S1, shearing the wire according to the preset size;

step S2, performing shaping treatment on the workpiece sheared in the step S1;

step S3, performing upsetting treatment on the workpiece obtained in the step S2;

step S4, performing stamping and preforming on the workpiece obtained in the step S3;

step S5, stamping the workpiece obtained in the step S4 to form a slag-proof groove and an anti-slip groove on the surface of the workpiece;

step S6, stamping the workpiece obtained by the step S5 to form a stamped blind hole on the surface of the workpiece;

and step S7, stamping the workpiece obtained by the processing in the step S6 to punch away the bottom waste of the stamped blind hole of the workpiece, so that a through hole is formed in the workpiece, and a finished workpiece is obtained.

In order to complete the steps of the cold heading forming process, referring to fig. 2, a conventional cold heading forming apparatus is shown, which operates on the principle that a punch driving mechanism drives six dies 10 to perform punching, and punch rods 11 of the six dies 10 punch workpieces 30 placed in die cavities 21 of six main dies 20, respectively. The cold heading force required by stamping and forming each workpiece is 40T, and the total cold heading force is 240T. However, the total cold heading force required by one-time cold heading forming of the welded nut exceeds 30% of the maximum cold heading force provided by the existing cold heading forming equipment, and the existing cold heading forming equipment cannot complete one-time cold heading forming process of the welded nut.

To this end, the applicant has sought, through useful research and research, a solution to the above-mentioned problems, in the context of which the technical solutions to be described below have been made.

Disclosure of Invention

The technical problem to be solved by the invention is as follows: the cold-heading full-size forming equipment for the overload jump welding nut is provided aiming at the defects of the prior art.

The technical problem to be solved by the invention can be realized by adopting the following technical scheme:

the utility model provides an overload jump welding nut cold-heading full-size former, includes:

the device comprises a rack, a feeding device and a control device, wherein the rack is divided into a material shearing station and a plurality of stamping stations at intervals along the feeding direction;

the wire die is arranged at a material shearing station of the rack and used for installing a wire rod coiled wire die;

the feeding driving mechanism is arranged at a material shearing station of the rack and used for driving the disc to feed at intervals;

the punching and shearing head mechanism is arranged at a material shearing station of the rack and is used for punching and shearing the wire rods sent out by the wire rods;

the main die is respectively arranged at each stamping station of the frame and is provided with a die cavity for placing a workpiece;

the stamping dies are respectively arranged at each stamping station of the rack, and each stamping die is provided with a stamping rod;

the stamping driving mechanism is arranged on the frame and used for driving each stamping die to stamp towards the direction of the main die corresponding to the stamping die;

the clamping jaw mechanism is arranged on the rack and used for clamping the workpiece and conveying the workpiece to the next station; and

and the PLC control system is respectively connected with the feeding driving mechanism, the punching and shearing mechanism, the punching driving mechanism and the clamping jaw mechanism.

In a preferred embodiment of the present invention, the feed driving mechanism includes:

the connecting main shaft is axially arranged on the rack, and one end of the connecting main shaft is connected with the disc;

the feeding ratchet wheel is sleeved on the other end of the connecting main shaft, and a plurality of ratchets are formed on the peripheral surface of the feeding ratchet wheel at uniform intervals in the axial direction;

the unidirectional high-low tooth ratchet wheel is sleeved on the other end of the connecting main shaft and abuts against the feeding ratchet wheel, a plurality of low teeth and a plurality of high teeth which are distributed in a staggered mode are formed on the peripheral surface of the unidirectional high-low tooth ratchet wheel at intervals in the circumferential direction, and the tooth depth of the second low teeth is consistent with the tooth depth of the ratchet;

the pawl is arranged on the rack and positioned above the feeding ratchet wheel and the unidirectional high-low tooth ratchet wheel; and

and the pawl driving mechanism is arranged on the rack and connected with the PLC control system and is used for driving the pawl to stir the feeding ratchet wheel and the unidirectional high-low tooth ratchet wheel.

Due to the adoption of the technical scheme, the invention has the beneficial effects that: the original continuous feeding mode is changed into the spaced feeding mode, so that one punching station of two adjacent punching stations is punched, the other punching station is empty, and the total cold heading force required by cold heading forming of the workpiece is changed into one half of the original cold heading force, so that the production range of the cold heading force allowed by corresponding cooling forming equipment is met, and the production requirement of the cold heading forming process of the welded nut is met.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

FIG. 1 is a schematic representation of the evolution of the weld nut cold-headed workpiece of the present invention.

Fig. 2 is a schematic structural view of a conventional cold heading forming apparatus.

Fig. 3 is a schematic structural diagram of the overload jump welding nut cold heading full-size forming equipment in feeding.

Fig. 4 is a schematic structural diagram of the overload jump welding nut cold heading full-size forming equipment in the non-feeding state.

Fig. 5 is a front view of the feed drive mechanism of the present invention.

Fig. 6 is a cross-sectional view of the feed drive mechanism of the present invention.

Detailed Description

In order to make the technical means, the creation characteristics, the achievement purposes and the effects of the invention easy to understand, the invention is further explained below by combining the specific drawings.

Referring to fig. 3 and 4, the cold-heading full-size forming device for the overload jump-beating welded nut comprises a rack (not shown), a wire die 100, a feeding driving mechanism (not shown), a punching and shearing head mechanism 200, six main dies 300a, 300b, 300c, 300d, 300e and 300f, six dies 400a, 400b, 400c, 400d, 400e and 400f, a punching driving mechanism (not shown), a clamping jaw mechanism (not shown) and a PLC control system (not shown).

The machine frame is divided into a material shearing station and six stamping stations at intervals along the feeding direction, the material shearing station finishes a wire shearing process, and the six stamping stations finish a workpiece shaping process, a workpiece upsetting process, a workpiece stamping and preforming process, a workpiece slag-proof groove and anti-slip groove forming process, a workpiece stamping blind hole forming process and a workpiece through hole forming process in sequence.

The wire die 100 is installed at a trimming station of the rack for mounting the wire-wound disc 10.

The feeding driving mechanism is arranged at a material shearing station of the frame and is used for driving the disc 10 to feed at intervals. Specifically, referring to fig. 5 and 6, the feeding drive mechanism 500 includes a connecting main shaft 510, a feeding ratchet 520, a one-way high-low tooth ratchet 530, a pawl 540, and a pawl drive mechanism (not shown). The connecting main shaft 510 is axially provided on the frame, and one end thereof is connected to the disc for driving the disc to rotate, thereby feeding the wire wound on the disc. The feeding ratchet wheel 520 is fixedly sleeved on the other end of the connecting main shaft 510, and a plurality of ratchet teeth 511 are axially formed on the outer peripheral surface of the feeding ratchet wheel 510 at intervals. The unidirectional high-low tooth ratchet 530 is sleeved on the other end of the connecting main shaft 510 through the cover plate 550 and abuts against the feeding ratchet 520, a plurality of low teeth 531 and a plurality of high teeth 532 are formed on the outer peripheral surface of the unidirectional high-low tooth ratchet 530 at intervals, the plurality of low teeth 531 and the plurality of high teeth 532 are arranged in a staggered mode, and the depth of the low teeth 531 of the unidirectional high-low tooth ratchet 530 is consistent with that of the ratchet 511 of the feeding ratchet 520. The pawl 540 is disposed on the frame above the feed ratchet 520 and the one-way high-low teeth ratchet 530. The pawl driving mechanism is arranged on the rack and connected with the PLC control system, and is used for driving the pawl 540 to shift the feeding ratchet wheel 520 and the unidirectional high-low tooth ratchet wheel 530.

When the pawl 540 is shifted to the high tooth 532 of the unidirectional high-low tooth ratchet wheel 530, the diameter difference d exists between the feeding ratchet wheel 520 and the unidirectional high-low tooth ratchet wheel 530, the unidirectional high-low tooth ratchet wheel 530 slips, the feeding ratchet wheel 520 does not rotate, and therefore feeding cannot be performed. When the pawl 540 is shifted to the low teeth 531 of the unidirectional high-low teeth ratchet 530, the ratchet 521 of the feeding ratchet 520 is matched with the low teeth 531 of the unidirectional high-low teeth ratchet 530, and the feeding ratchet 520 is shifted by the pawl 540, so that the disc is driven to feed. The above two movements are repeated to realize interval feeding, namely the cold heading industry called 'jumping'.

The punching and shearing head mechanism 200 is installed at a material shearing station of the rack and is used for punching and shearing the wire rod sent out by the wire rod 10. The punching shear head mechanism 200 is a conventional component of the existing cold heading forming device, and the detailed description thereof is omitted.

Master molds 300a, 300b, 300c, 300d, 300e, 300f are mounted at the six stamping stations of the frame, respectively, master molds 300a, 300b, 300c, 300d, 300e, 300f having a mold cavity 310a, 310b, 310c, 310d, 310e, 310f for placing a work piece.

The dies 400a, 400b, 400c, 400d, 400e, 400f are respectively installed at six punching stations of the frame in a one-to-one correspondence relationship with the master dies 300a, 300b, 300c, 300d, 300e, 300f, and the dies 400a, 400b, 400c, 400d, 400e, 400f have a punch bar 410a, 410b, 410c, 410d, 410e, 410 f.

The punch driving mechanism is mounted on the frame and drives the dies 400a, 400b, 400c, 400d, 400e, and 400f to punch in the direction of the corresponding master dies 300a, 300b, 300c, 300d, 300e, and 300 f. The stamping driving mechanism is a conventional component of the existing cold heading forming equipment, and the detailed description is omitted.

The clamping jaw mechanism is arranged on the machine frame and used for clamping a workpiece and conveying the workpiece to the next station. In this embodiment, the clamping jaw mechanism has six clamping jaws, and the six clamping jaws are respectively located between two adjacent stations and are used for clamping and conveying the workpiece processed at the previous station to the next station for processing. The clamping jaw mechanism is a conventional component of the existing cold heading forming equipment, and the detailed description is omitted.

The PLC control system is respectively connected with the feeding driving mechanism, the punching and shearing head mechanism 200, the punching driving mechanism and the clamping jaw mechanism.

The original continuous feeding mode is changed into the spaced feeding mode, so that one punching station of two adjacent punching stations is punched, the other punching station is empty, and the total cold heading force required by cold heading forming of the workpiece is changed into one half of the original cold heading force, so that the production range of the cold heading force allowed by corresponding cooling forming equipment is met, and the production requirement of the cold heading forming process of the welded nut is met.

The foregoing shows and describes the general principles and broad features of the present invention and advantages thereof. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.