KR20050020560A - Device for manufacturing bolts - Google Patents

Abstract

PURPOSE: To provide an apparatus for manufacturing stud bolts, wherein the apparatus is capable of substantially reducing cost by automatically manufacturing stud bolts on a cross section of which a conduction terminal for improving welding performance is formed by a multistage forming machine. CONSTITUTION: In a multistage stud bolt forming machine comprising a plural forming units(3,4) comprising supports(12-15) and punches(16-19), the apparatus for manufacturing stud bolts is characterized in that the forming units comprise a dented subsidiary forming unit(5) for forming a dented part on one side surface of rod shaped workpieces(9); a terminal mounting forming unit(6) for pressing and fixing a part of conduction terminal formed of a material having good conductivity such as aluminum into the formed dented part; a lot shaped conduction terminal receiving frame and an ordinary lot for workpieces extrusion that are arranged in holes of supports into which the rod shaped workpieces are inserted, wherein a conduction terminal receiving part is formed on a front part of the lot shaped conduction terminal receiving frame, and the ordinary lot for workpiece extrusion is inserted into the receiving frame from the outer side such that the ordinary lot for workpiece extrusion is freely receded from the receiving frame; and a conduction terminal supply means for supplying one conduction terminal into a moving hole of the receiving frame of the ordinary lot moved forward further than a front part of the receiving frame to extrude the workpieces, wherein the ordinary lot is receded by the rod shaped workpieces pressed into the supports so that the conduction terminal supplied into a receiving frame moving hole of the ordinary lot is pressed into the dented part of the cross section of the rod shaped workpieces by a conduction terminal receiving part in front of the receiving frame.

Description

Device for manufacturing bolts {Device for manufacturing bolts}

The present invention relates to a stud bolt used in the construction of steel reinforced concrete-like buildings, and more specifically, in order to increase the bond between the steel and concrete, it is electro-welded to the surface of the steel, in some cases the head, Stud bolts that are also welded to the reinforcing bars are particularly related to the apparatus for producing stud bolts having a current-carrying terminal attached to a welded end face.

In general, the start bolt is a positive conductive material such as aluminum in the center of the end face of the stud bolt in order to improve the welding performance by increasing the power supply efficiency when electric welding to the steel surface in order to increase the mutual bond between steel and concrete. It is known to attach an electrically conductive terminal.

The stud bolt with the current carrying terminal is conventionally manufactured by using a multi-stage molding machine for stud bolts formed in the center of the end face of the weld side, and manually inserting a part of the current carrying terminal, such as aluminum, into the recessed part of the stud bolt. Since it was manufactured by fixing, there was a defect that work efficiency fell and manufacturing cost increased.

Therefore, the object of the present invention devised to solve the above problems can be automatically manufactured in a multi-stage molding machine with a stud bolt having a current-carrying terminal to improve the welding performance in the cross-section, to achieve a significant cost reduction It is to provide a stud bolt manufacturing apparatus.

Accordingly, the present invention for achieving the above object is to add a concave forming unit (5) and a terminal mounting molding unit (6) to the multi-stage molding machine for stud bolt molding in the terminal mounting molding unit (6) The rod-shaped conductive terminal frame 24 of the rod 15 in the rod-shaped material insertion hole of the die 15 of the die 15, and the inlet and outgoing movements of the housing frame 24 are freely inserted into the mold. Conveying terminal supply means (27) for arranging the rod (25) and supplying one conducting terminal (23) to the receiving frame moving hole (25a) of the cylindrical rod (25) which is moved forward than the receiving frame tip. In addition, the normal rod 25 is pushed back by the rod-like material 9, so that the conduction terminal 23 in the receiving frame moving hole 25a is moved by the conducting terminal accommodating portion 24a at the tip of the receiving frame. Relatively press-fit into the recess 48 of the cross section of the rod-like material It is characterized by one point.

Further, the apparatus for producing stud bolts of the present invention is an electrical forming unit of a multi-stage molding machine for stud bolt forming in which a molding unit consisting of a pedestal and a punch is provided in multiple stages, and a recess 48 is formed on one end surface of the rod-like material 9. A terminal mounting molding unit 6 for press-fitting and fixing a part of the conductive terminal 23 made of a positive conductive material such as aluminum to the recessed portion forming unit 5 and the molded portion 48 formed by And a rod-shaped conductive terminal receiving frame 24 having a conductive terminal accommodating portion 24a at a distal end thereof in the rod-like material fitting hole 15a of the pedestal 15 in the electric terminal mounting molding unit 6. The accommodation frame movement hole of the ordinary rod 25 moved forward than the accommodation frame end for extruding the molding, while arranging the molded rod cylindrical rod 25 in which the withdrawal movement is freely inserted from the outside of the housing frame 24. Supply one energizing terminal 23 within 25a. The current supply terminal 27 is provided in parallel, and the ordinary rod 25 is retracted by the rod-like material 9 press-fitted into the pedestal 15, and in the receiving frame moving hole 25a of the ordinary rod 25. The supplied conductive terminal 23 is characterized in that it is relatively press-fitted into the concave portion 48 of the rod-shaped material end face by the conductive terminal receiving portion 24a at the tip of the housing frame.

Hereinafter, an embodiment of the present invention will be described with reference to the accompanying drawings. In FIG. 1A, the cutout unit 2 and the stud bolt forming units 3 and 4 for cutting the wire rod 1 to a predetermined length are concave. As the molding unit 5 and the terminal mounting molding unit 6, each of these units 2 to 6 is constituted by a multi-stage molding machine provided with equal intervals.

The dimension cutting unit (2) is composed of a fixed wire rod guide (7) and a cutter (8) to move horizontally, by the cutter (8) fixed wire rod (1) sent from the wire guide (7) Cut to length to form a rod-like material 9.

The rod-like material 9 is sequentially sent out to the molding unit stud bolt forming units 3 and 4 at each end by the inter-material discharging mechanism (not shown) to the concave portion forming unit 5 and the terminal mounting forming unit 6.

The molding units 3 to 6 at each end are composed of pedestals 12 to 15 provided on the fixed base 10 and punches 16 to 19 provided on the ram 11 reciprocating.

In addition, the two stud bolt forming units 3 and 4 at the front end form a head 20 having a predetermined shape at the outer end of the rod-like material 9.

The concave shaping unit 5 is energized by the concave shaping frame 21 provided in the above-described stand 14 at the center of the inner end surface of the rod-like material 9 press-fitted into the stand 14 by the punch 18. The press-fit recessed part 48 is shape | molded.

The terminal mounting molding unit 6 of the final stage is provided by the receiving frame unit 22 installed in the pedestal 15 in the concave portion of the rod-like material 9 press-fitted into the pedestal 15 by the punch 19. A part of the spherical conduction terminal 23 is press-fitted and fixed.

In addition, the housing frame unit 22 is an ordinary rod for molding the molded housing frame 24 of the rod having a receiving portion 24a for accommodating the energizing terminal 23 at its tip as shown in FIGS. 1B and 2. 25) and a stopper 26 for preventing terminal dropout.

In addition, the receiving terminal unit 22 is provided with an energization terminal supply means 27.

The rod holding frame 24 is located concentrically in the rod-shaped material insertion hole 15a of the pedestal 15, and at the rear end large diameter portion 24b, a guide block fixed to the rod 15 is usually formed. 28) is movably held within a certain range in the axial direction.

In addition, the ordinary rod 25 is inserted into the rod-like material insertion hole 15a of the pedestal 15 so as to be movable outside of the receiving frame 24 within a predetermined range in the axial center direction, and the tip portion thereof is located at the distal end thereof. The stopper 26 is provided in parallel. The stopper 26 is composed of a plurality of circumferential spheres 26a added inwardly with a spring so as to protrude into the receiving frame moving hole 25a of the cylindrical rod 25.

In the ordinary rod 25, a guide groove 30 into which the inner end of the rotation stopping bolt 29 fitted to the pedestal 15 is fitted is formed along the circumferential direction of the outer circumferential surface thereof.

In addition, the energization terminal supply means 27 is installed so as to penetrate radially through the circumferential wall of the ordinary rod 25, and also the energization terminal holding hole 31 and the ordinary rod for holding one energization terminal 23. As shown in Fig. 1B, when the retracted position is in the retracted position, it is constituted by an energizing terminal supply pipe 32 provided in the pedestal 15 so as to communicate with the outer end of the energizing terminal retaining hole 31. As shown in 1B, when the ordinary rod 25 is in the retreat limit position, the inner end of the energizing terminal retaining hole 31 is closed by the housing frame 24, and as shown in FIG. It is comprised so that the inner end of the said energization terminal holding hole 31 may open | release and communicate with the receiving frame movement hole 25a in the rod 25 normally when the rod 25 advances.

In addition, the inner end of the energizing terminal supply pipe 32 is loosely fitted in the concave groove 33 formed along the axial direction on the outer circumferential surface of the ordinary rod 25, and the energizing terminal holding hole 31 is the concave groove ( It is installed near the shear in 33).

As the air inlet pipe 34, as shown in FIG. 2, when the ordinary rod 25 is in the advance limit position, the normal rod 25 of the ordinary rod 25 passes through the concave groove 33 and the energizing terminal holding hole 31. As shown in FIG. The cleaning air is fed into the receiving frame moving hole 25a.

As shown in FIG. 2 and FIG. 3, the pusher rod 36 and the electric drive 27 which are freely supported by the axial direction movement by the fixed guide block 35 are arrange | positioned at the rear side of the said base 15. As shown in FIG. .

The pusher rod 36 penetrates the guide block 28 fixed in the pedestal 15 so that its front end is in contact with the rear end face of the ordinary rod 25, and the electric rod 37 is the guide block 28. It penetrates through and comes into contact with the rear end surface of the rear end large diameter part 24b of the housing frame 24. As shown in FIG.

In addition, the rear end of the pusher rod 36 is in contact with the front end surface of the pusher 39 supported in the fixed cylindrical guide 38 so as to be able to move axially in the fixed cylindrical guide 38, and the electric rod ( 37 penetrates through the axial center portion of the pusher 39 so as to be movable relative to the radially through space portion 39a formed in the middle portion of the pusher 39.

The receiving frame 24 is moved in the advancing limit direction shown in FIG. 2 via the electric rod 37 and a normal lever 43 whose intermediate portion is axially supported by the support shaft 42 on the outside of the fixed cylindrical guide 38. The biasing means 40 is a biasing means 40, and the detection means 41 is configured to move the retracting movement of the receiving frame 24 during the press-in operation of the energizing terminal 23, and the one end 43a of the electric rod 37 and the normal lever 43 The fixed cylindrical guide 38 penetrates into the through space 39a of the pusher 39 and abuts against the rear end of the electric rod 37.

And the biasing means 40 is composed of a pressing rod 44 for pressing the side of the other end 43b of the top lever 43, and a spring 45 for adding the pressing rod 44, The detection means 41 is comprised by the proximity switch 46 which detects the side of the other end 43b of the normal lever 43 approaching within a fixed distance.

Referring to the operation of the terminal mounting molding unit 6 configured as described above with reference to Figs. 2 to 4, the terminal mounting molding unit 6 immediately before accommodating the rod-like material 9 is shown in Fig. 2. Similarly, the stud bolt 47 completed by attaching the energizing terminal 23 is extruded from the pedestal 15 by the normal rod 25, and the normal rod 25 is at the exit limit position, and the energizing terminal is maintained. One energizing terminal 23 held in the hole 31 falls into the receiving frame moving hole 25a of the ordinary rod 25.

The dropping of the conduction terminal 23 from the tip of the receiving frame moving hole 25a is prevented by the sphere 26a of the stopper 26.

In the above state, as shown in Fig. 4A by the concave portion forming unit 5 at the front end, the concave portion 48 for energizing terminal press-fitting is provided at the center of the end face of the stud bolt head 20 (welding side). The shaped rod-like material 9 is sent to the terminal mounting molding unit 6, and as shown in Fig. 4B, the rod-shaped material 9 is placed on the pedestal 15 by the punch 19 of the unit 6. The rod-like material 9 is pressed into the hole 15a.

At this time, the ordinary rod 25 in the advance limit position is pressed by the rod-like material 9 to move backward.

By the retraction movement of the ordinary rod 25, the pusher rod 36 and the pusher 39 are integrally retracted.

Since the rod constant receiving frame 24 receives the biasing force of the biasing means 40 (spring 45) in the advancing direction via the normal lever 43 and the electric rod 37, it is located in the exit limit position shown in FIG. It is maintained.

As the indentation of the rod-like material 9 proceeds, its inner end surface (concave portion 48 for pressurization of the energizing terminal) approaches the tip-receiving portion 24a of the receiving frame 24 waiting at the advance limit position and is shown in Fig. 4C. As described above, the electricity supply terminal 23, which is fed into the receiving frame moving hole 25a of the ordinary rod 25, is retracted from the normal rod 25 to the receiving frame 24 by the retraction movement of the ordinary rod 25. The revolving movement of the rod 26 pushes the sphere 26a of the stopper 26 at the distal end of the rod 25 radially outward against the bias force of the spring 45, and passes through the front relatively to form a rod-like material. The inner end face of (9) (it is inserted between the recessed part 48 for pressurization of an electric terminal, and the tip accommodating part 24a of the receiving frame 24).

Thereafter, the housing frame 24 is pressed backward through the energizing terminal 23 by the press-fitting action of the rod-like material 9, and as shown in FIG. 3, the housing frame 24 is the biasing means 40 ( Slightly retreating against the biasing force of the spring 45, the rear end large diameter portion 24b of the receiving frame 24 is blocked by the fixed guide block 35.

And the tip receiving portion 24a and the rod-like material of the receiving frame 24 in which the rear end is accommodated in the guide block 35 fixed as described above by the final indentation action of the punch 19 against the rod-like material 9. The conductive terminal 23 is compressed in the axial direction between the inner end face (9) of the concave portion for energizing terminal presses, and the energizing terminal 23 is a recessed portion for pressurizing the energizing terminal of the rod-like material 9 It is press-fitted in 48 and the stud bolt 47 shown to FIG. 4D is completed.

Thereafter, the pusher 39, which is pushed back to the retreat limit position via the pusher rod 36, is pushed forward by the hammer arm other than the drawing, and the normal rod 25 moves forward through the pusher rod 36. Then, the rod-like material 9 (completed stud bolt 47) in the pedestal 15 is extruded out of the pedestal 15.

At this time, the punch 19 also moves back to the original position.

As shown in Fig. 3, when the rod 25 is moved back to the retreat limit position by the rod-like material 9, the conduction terminal retaining hole 31 of the rod 25 is provided in the pedestal 15. Since it is communicated with the supply pipe 32, the electricity supply terminal 23 in the supply pipe 32 falls by gravity, and the lowest one electricity supply terminal 23 falls in the holding hole 31 of the said normal rod 25. maintain.

Accordingly, one energizing terminal 23 in the energizing terminal holding hole 31 is forwarded by the normal rod 25 moving forward for the extrusion of the completed stud bolts 47, as shown in FIG. As described above, at the end of the extrusion of the stud bolt when the rod 25 reaches the exit limit position, one energizing terminal 23 in the energizing terminal holding hole 31 is gravity and the receiving frame moving hole of the rod 25 is gravity. It falls into 25a, and preparation for the next terminal mounting process is completed.

If the supply terminal supply action into the receiving frame moving hole 25a of the rod 25 is, for example, clogging in the supply terminal supply pipe 32 or the feeder supplying the supply terminal 23 to the supply pipe 32. It is not performed normally due to abnormal operation or the absence of the power supply terminal in the hopper attached to the feeder, and the power supply terminal 23 is not supplied in the receiving frame moving hole 25a of the rod 25. When the terminal mounting step is executed, the housing frame 24 is not pushed back by the rod-like material 9 via the energizing terminal 23.

In other words, when the energizing terminal 23 is not interposed between the housing frame 24 and the rod-like material 9, the rod-like material 9 is placed to the limit within the hole 15a through which the rod-shaped material is inserted. Even if press-fitted, the advance limit position of the housing frame 24 is determined so that the inner end surface of the rod-like material 9 does not touch the tip of the housing frame 24 at the advanced limit position.

Therefore, when the energization terminal 23 is supplied into the receiving frame moving hole 25a of the rod 25, the receiving frame 24 is pressed backward by the rod-like material 9 via the energizing terminal 23. A small amount of retraction movement is transmitted to the normal lever 43 via the electric rod 37, and as shown in FIG. 3, the normal lever 43 is biased by the spring 45 around the support shaft 42. As shown in FIG. The predetermined angle is oscillated counterclockwise against the force, and the other end 43b is detected in proximity to the proximity switch 46.

As shown in FIG. 2, since the housing frame 24 does not move backward from the advance limit position when the energization terminal 23 is not supplied into the housing frame movement hole 25a of the rod 25 as described above. Similarly, the normal lever 43 is a standby position maintained by the force of the spring 45 and the proximity switch 46 does not output the detection signal.

For this reason, whether the electricity supply terminal 23 is attached to the cross section of the rod-shaped material 9 can be discriminated by the presence or absence of the detection signal of the said proximity switch 46. FIG.

Although not shown, a suction means for using a vacuum pump for sucking up the energization terminal 23 in the supply pipe 32, such as during maintenance, may be installed in the middle of the energization terminal supply pipe 32 or near the feeder side end. There is also.

As described above, the apparatus for manufacturing stud bolts according to the present invention includes a concave forming unit for forming a concave portion on one end surface of a rod-shaped material in a multi-stage molding machine which automatically manufactures a stud bolt from a rod-shaped material, and an aluminum or the like in the formed concave portion. It can be carried out simply by adding a terminal mounting molding unit that press-fits and fixes a part of the conducting terminal made of a positive conductive material.

Then, by pressing a predetermined stroke with a punch of a rod-shaped material having a recessed end portion for terminal press-fitting in the end face in a concave portion forming unit of the front end in a hole for inserting the rod-shaped material of the pedestal in the terminal mounting molding unit. The energization terminal supplied in the receiving frame moving hole of the molded extrusion cylindrical rod can be axially compressed between the receiving frame on the rod penetrating into the ordinary rod and press-fitted in the concave portion.

In addition, the stud bolt completed by attaching a current-carrying terminal can be extruded from within the pedestal by the ordinary rod for extruding the molded article.

Therefore, according to the manufacturing apparatus of the present invention, a stud bolt having a current-carrying terminal for improving welding performance can be automatically manufactured in a multi-stage molding machine, and a significant cost reduction can be achieved.

In particular, as shown in the embodiment, when the terminal drop prevention stopper pushed open by an energizing terminal relatively extruded by the housing frame is disposed at the tip of the housing frame moving hole in the molded extrusion cylindrical rod, It can solve the irrationality that the supplied energizing terminal is electrically driven out of the ordinary rod by vibration or the like and the press-fitting of the rod-like material into the cross-sectional recessed portion cannot be performed.

In addition, in the case of providing a rod for energizing the receiving terminal frame on the rod freely within a certain range, and adding a biasing means for adding in the advancing limit direction and a detecting means for detecting the retreat movement during energizing terminal injection, The detection means can automatically detect whether or not the press-fit fixing operation of the energizing terminal has been performed, and the discriminating and removing operation of the stud bolt without the energizing terminal easily performed.

Again, as a means for automatically supplying one energizing terminal into the ordinary rod receiving frame moving hole one by one, it is laid so as to penetrate radially through the circumferential wall of the ordinary rod, and also maintains one energizing terminal. And an electricity supply terminal supply pipe provided with a pedestal so as to communicate with the outer end of the electricity supply terminal hole when the normal rod is in the retreat limit position, and the inner end of the electricity supply terminal retaining hole is provided when the normal rod is in the retreat limit position. When closed by the housing frame and configured so that the inner end of the energizing terminal holding hole is opened when the normal rod is moved out, the energizing terminal in the normal rod is used one by one by using the reciprocating movement of the normal rod for reciprocating molding. The automatic supply of can be realized simply and easily.

1A is a schematic cross-sectional view illustrating the structure of an entire multi-stage molding machine, and FIG. B is a longitudinal side view showing a main part showing the terminal press-in operation of the terminal mounting molding unit.

Figure 2 is a longitudinal cross-sectional view of the whole showing the stud bolt extrusion operation state of the terminal mounting molding unit.

Fig. 3 is an overall longitudinal side view showing the terminal press-fitting operation of the terminal mounting molding unit.

Fig. 4 is a partial vertical side view of the main portion for explaining each step of manufacturing the terminal mounting stud bolt from the rod-shaped material having the concave portion formed in the cross section.

Explanation of symbols on the main parts of the drawings

1: wire rod 2: dimension cutting unit

3: stud bolt forming unit 4: stud bolt forming unit

5: recessed molding unit 6: terminal mounting molding unit

7: Wire Rod Guide 8: Cutter

9: rod material 11: Lam

12, 13, 14, 15: pedestal

16, 17, 18, 19: Punch

20: stud bolt head 21: recessed mold

22: housing frame unit 23: the energized terminal of the idea

24: Conduction terminal receiving frame on rod 24a: Conduction terminal receiving part

25: ordinary rod for molding extrusion 25a: receiving frame moving hole

26: Stopper for preventing terminal drop 27: Supply terminal supply means

28: guide block 29: rotating jersey bolt

30: Information Home

31: Power supply terminal holding hole (Power supply terminal supply means)

32: power supply terminal supply pipe (power supply terminal supply means)

33: concave groove 34: air inlet pipe

35: Information Block 36: Pusher Rod

37: Electric Rod 38: Fixed Normal Guide

39: pusher 39a: through space portion

40: addition means 41: detection means

43: normal lever 43a: normal lever

43b: other end 44: pressing rod

45: spring 46: proximity switch

47: stud bolt with terminal 48: recessed part for terminal fitting

Claims (2)

A concave part forming unit for forming a concave part on one end surface of a rod-shaped material as the forming unit of a multi-stage molding machine for stud bolt forming, in which a molding unit consisting of a pedestal and a punch is provided in multiple stages, and a positive charge such as aluminum in the concave part formed. A rod-shaped conducting terminal accommodating portion having a conducting terminal accommodating portion at a distal end thereof is provided with a terminal mounting molding unit for press-fitting and fixing a part of a conducting terminal made of ceramic material, and having a rod-like material insertion hole of a pedestal in the terminal mounting molding unit. A single rod is placed in the receiving frame moving hole of the ordinary rod, which is moved forward from the tip of the receiving frame for the extrusion of the molding, while arranging the mold and the extrusion rod freely moving from the outside of the housing and the receiving frame. In addition, the supply terminal supply means for supplying, by the rod-like material that the ordinary rod is pressed into the pedestal Manufacture of stud bolts characterized in that the conduction terminal supplied to the receiving frame moving hole of the ordinary rod is moved in and out relative to the concave portion of the rod-shaped material end face by the conducting terminal accommodating portion of the accommodating frame end. Device. 2. The apparatus for producing a stud bolt according to claim 1, wherein a terminal drop prevention stopper, which is pushed open by a current-carrying terminal that is pushed out relative to the housing frame, is disposed at the tip of the housing frame movement hole in the rod.