JPS6317029B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a metal conductor butt brazing machine that butts and brazes the ends of both metal conductors.

(Prior Art) The operation of this type of metal conductor butt brazing machine during connection requires very complicated procedures.
The drawback was that it took time to completely master the procedure. In addition, because the procedure is complicated, it is easy to make mistakes in operation.

(Object of the Invention) An object of the present invention is to provide a metal conductor butt brazing machine that can easily perform a series of operations without making mistakes.

(Structure of the Invention) The present invention provides two sets of clamping tools, each consisting of a lower clamp arm, an upper clamp arm, and a clamp spring that biases both of the clamp arms in the clamping direction, so that one of them approaches and separates from the other. The two metal conductors to be brazed are individually clamped by the conductor holding parts of the lower clamp arm and the upper clamp arm of each of the clamping tools, and the metal conductors are arranged adjacently so that the metal conductors can be brazed. In a metal conductor butt brazing machine that brazes both metal conductors by energizing them with a brazing material interposed in the mating part, the clamping force of each clamp spring is adjusted to a fully clamped state and a temporary clamped state, respectively. Each spring operation pin for operation is slidably inserted into each of the lower clamp arms at its proximal end so that each spring operation pin receives one end of each of the clamp springs at each tip, and is inserted into each of the lower clamp arms so as to be slidable. are both ends of a composite cam mechanism that controls the clamping force via the spring operation pin and controls the clamping tool on the movable side to move the clamping tool on the fixed side to apply abutting force to both metal conductors. are fitted and supported, and the movable clamping tool is biased by a spring means so as to approach the fixed clamping tool, and the compound cam mechanism has a cylindrical shape and has ends at both ends. a movable cam body that is rotatably fitted into cam housing holes in both lower clamp arms, and a movable cam body that is fixed in the cam housing hole of the clamp tool on the fixed side opposite to the end surface of the movable cam body. The movable cam body includes a fixed cam body, and an operating lever for rotating the movable cam body around its axis. A cam groove is provided on the opposite end surface of the movable cam body and the fixed cam body to allow the clamping tool on the movable side to be depressed when the movable cam body is rotated to a required angle by operating the operating lever. It is characterized in that a cam surface is provided for moving in the direction of the clamping tool on the fixed side.

In a metal conductor butt brazing machine with such a structure, when the handle is operated to turn the movable cam body at a certain angle and each cam groove faces each spring operating pin, the base end of each spring operating pin is The clamping force of each clamp spring is weakened by falling into each cam groove, and each clamping tool becomes temporarily clamped. In this state, the metal conductor to be brazed is set on both clamping tools to temporarily clamp, and both metal conductors are placed in a temporarily clamped state. A brazing filler metal is interposed between the tips of the Next, when the operating lever is turned in a certain direction, each spring operating pin is first pushed out of each cam groove and rides on the outer periphery of the movable cam body, compressing each clamp spring and each clamping tool becoming completely clamped. Next, the movable cam body is pushed in the direction of its axis by the action of the cam surfaces of the movable cam body and the fixed cam body, and the action of the spring means, and the clamping tool on the movable side is clamped in the direction of the clamping tool on the fixed side. The metal conductor is pressed together with the metal conductor, and both metal conductors are pushed together through the brazing material. When the control lever is further turned in a certain direction, a part of the control lever is turned on and electricity is applied to both metal conductors via both clamps, the brazing metal is melted, and both metal conductors are brought together and brazed. be done. Once the brazing is complete, the electricity is cut off.

(Example) Examples of the present invention will be described in detail below with reference to the drawings. As shown in FIGS. 1 to 9, the metal conductor butt brazing machine of this embodiment includes two sets of clamp tools 1 and 2 that are arranged adjacent to each other. Each clamping tool 1, 2 is made of a metal with good conductivity and includes an L-shaped lower clamp arm 3, 4 and a substantially linear upper clamp arm 5, 6,
These arms 3, 5, 4, 6 have brackets 7 projecting from the upper clamp arms 5, 6 in the middle thereof.
(The bracket on the upper clamp arm 6 side is not shown), and the pivot pin 8 (the pivot pin on the lower clamp arm 4 side is not shown) that passes through the lower clamp arms 3 and 4 and passes through the bracket 7. It is pivotally connected so that it can be opened and closed. The conductor clamping parts 3A, 4A, 5A, 6A at the tips of the lower clamp arms 3, 4 and the upper clamp arms 5, 6 are provided with insulating materials 9, 10 on the protruding end faces facing each other between the adjacent clamp tools 1, 2. , 11, and 12 are respectively attached to prevent them from being shot. The clamping surfaces of the conductor clamping parts 3A and 4A have large diameter conductor insertion grooves 13 and 14 and a small diameter conductor insertion groove 15 (the narrow diameter conductor insertion groove on the conductor clamping part 4A side is not shown). , 2 are aligned with each other. At the outer ends of these grooves 13, 14, 15, tapered grooves 16, 17, 18 for conductor insertion (the tapered structure for conductor insertion on the conductor holding part 4A side is not shown) are provided to facilitate the insertion of the metal conductor. formed continuously. Tapered surfaces 1 are provided on the end surfaces of the upper clamp arms 5 and 6 on the side where these tapered grooves 16, 17, and 18 exist to facilitate insertion of the metal conductor.
9 and 20 are formed. Both conductor clamping parts 3A and 4A having the large-diameter conductor insertion grooves 13 and 14 and the small-diameter conductor insertion groove 15 are made of a slippery insulating material such as tetrafluoroethylene to ensure alignment of the metal conductor. A centering pin 21 is slidably inserted. A U-shaped clamp auxiliary spring 22 (arm 4 ，
Clamp auxiliary springs on the 6 side (not shown) are interposed to bias each upper clamp arm 5, 6 in the clamping direction. These clamp auxiliary springs 22 have both conductor clamping parts 3A and 5.
A, 4A, and 6A are selected to have spring force that can temporarily clamp the metal conductor with a weak force.

At the rear of the lower clamp arms 3, 4 and the upper clamp arms 5, 6 on the side of the clamp auxiliary springs 22, clamp springs 23, 24 made of coiled compression springs are interposed, respectively, to support the upper clamp arms 5, 6. It is designed to be biased in the direction of the clamp. At the rear of each clamp tool 1, 2, there are spring operating pins 25, 26 for operating the clamping force of each clamp spring 23, 24 between a complete clamp state and a temporary clamp state, respectively, and a spring receiver at each tip thereof. 27, 28 for each clamp spring 23, 24
The proximal end side thereof is slidably inserted into each lower clamp arm 3, 4 so as to receive one end of the clamp arm, respectively. Each clamp spring 23, 24
The other end is supported by a spring receiver 31 (the spring receiver on the adjusting screw 30 side is not shown) at the tip of the adjustment screws 29, 30 screwed through the upper clamp arms 5, 6. Each spring operation pin 25,
Both ends of a compound cam mechanism 34 that controls the clamping force and moves the movable clamping tool 1 toward the fixed clamping tool 2 to apply abutting force to both metal conductors through the cam mechanism 26 are respectively fitted. Supported. The compound cam mechanism 34 has a cylindrical movable cam body 35 whose both ends are rotatably fitted into the cam housing holes 32 and 33, and a fixed side facing the end face of the movable cam body 35. A fixed cam body 36 fixed in the cam housing hole 33 of the clamp tool 2.
and an operating lever 37 for rotating the movable cam body 35 about its axis. The movable cam body 35 has both lower clamp arms 3,
It consists of movable cam bodies 39 and 40 that are integrated with an insulating plate 38 sandwiched between them so as to insulate them. Cam grooves 41 and 42 are provided on the outer peripheries of the movable cam bodies 39 and 40, respectively, for allowing the spring operation pins 25 and 26 to fall when they are opposed to their base ends. Balls 25A are located at the base ends of each spring operation pins 25 and 26 (the balls on the pin 26 side are not shown).
is rotatably supported, and the movable cam body 3
9 and 40 are designed to have good sliding on the outer periphery. Opposite end surfaces of the movable cam body 35 and the fixed cam body 36 are arranged so that when the movable cam body 35 is rotated to a required angle by operating the operating lever 37, the movable side clamping tool 1 is moved in the direction of the fixed side clamping tool 2. Cam surfaces 43 and 44 are provided, respectively. The cam surface 43 of the movable cam body 35 has a convex surface portion 43A,
It consists of a concave surface portion 43B and a tapered surface portion 43C. The cam surface 44 of the fixed cam body 36 has the convex surface portion 4
4A, a concave surface portion 44B, and a tapered surface portion 44C. A cam shaft 45 protrudes from the center of the cam surface 43 of the movable cam body 35.
An operating lever 37 is screwed onto the tip of the handle in a perpendicular direction. A cam shaft 4 is located at the center of the fixed cam body 36.
A through hole 46 is bored through the hole 5. A cam biasing spring 47 that biases the cam surface 43 of the movable cam body 35 to constantly contact the cam surface 44 of the fixed cam body 36 is fitted onto the outer periphery of the cam shaft 45 protruding from the lower clamp arm 4. ing. The operating lever 37 is provided with a switch operating portion 37A that operates a switch (not shown) that starts energization for brazing when the lever 37 is rotated to a required angle. At the base ends of both lower clamp arms 3 and 4, power supply terminals 48 and 49 are provided for energizing the metal conductor to be brazed via these arms.
is installed.

Lower clamp arm 3 of movable clamp tool 1
is fixed to an insulating stand 51 with a bolt 52 via a spring means 50 made of a leaf spring so that the butt pressure force of the metal conductor acts. In addition, 5
3 and 54 connect the spring means 50 to the lower clamp arm 3.
and the bolts fixed to the insulating stand 51. The lower clamp arm 4 of the clamping tool 2 on the fixed side is fixed to an insulating stand 51 with bolts 55.

A clamp tool movement stroke adjustment mechanism 56 is provided on the side surface of the movable lower clamp arm 3 for adjusting the movement range of the movable clamp tool 1 according to the diameter size of the metal conductor. This clamping tool movement stroke adjustment mechanism 56 includes a screw hole 57 formed on the side surface of the lower clamp arm 3 so as to communicate with the cam housing hole 32, and a screw tube into which a male threaded portion 58A is screwed. 58
an adjusting screw 59 which is screwed into the female threaded hole 58B of the threaded cylinder 58 and whose tip abuts against the axial end surface of the movable cam body 35; and a threaded hole 58C which is perpendicular to the threaded cylinder 58. It consists of an adjustment lever 60 screwed onto the adjustment lever 60 and a lock nut 61 that locks the adjustment screw 59. Stoppers 62 and 63 that limit the movement range of the adjustment lever 60 are protruded from the side surface of the lower clamp arm 3.

Next, a brazing operation using such a brazing machine will be explained with reference to FIGS. 1 to 9 and 10. When the operating lever 37 is turned clockwise in FIG. 2, each cam groove 41, 42 of the movable cam body 35
When the spring operation pins 25 and 26 face each other, the balls 25A and the like at the base ends of these pins 25 and 26 fall into the respective cam grooves 41 and 42, and the rotation of the movable cam body 35 is stopped. In this state, the compressive force applied to the clamp springs 23 and 24 is removed, causing the clamp springs 23 and 24 to extend, reducing the clamping force and leaving only the clamping force exerted by the clamp auxiliary spring 22. In this state, the tapered groove 16, 17 or 18 for conductor insertion of both clamp tools 1 and 2 and the tapered surface 1
metal conductor 64 to be brazed between 9 and 20;
When 65 is pushed in, the clamp auxiliary spring 22 has a weak clamping force, so the insertion force of the metal conductors 64 and 65 pushes open the conductor clamping parts 3A and 5A and between 4A and 6A, and the metal conductors 64 and 65 are inserted. Groove 1
3, 14 or 15 and protrude to the opposite side. Adjustment of the protrusion dimension can be easily performed because the metal conductors 64 and 65 are only lightly clamped temporarily so that they can be inserted and removed with one hand. Metal conductors 64, 65 inserted from both sides
The tips of the two are placed facing each other, and a silver brazing material 66 is interposed between them. At this time, the alignment pin 21 is used to prevent the axes of the metal conductors 64 and 65 from being misaligned. When the matching operation is completed, turn the operating lever 37 counterclockwise in FIG. 2. As a result, the movable cam body 35 is also rotated in the same direction, and in the process, each spring operation pin 25, 26 is rotated in each cam groove 41, 4.
2 and rides on the outer periphery of the movable cam bodies 39, 40, and as these spring operation pins 25, 26 rise, each clamp spring 23, 24 is compressed and the clamping force becomes stronger, and each metal conductor 64, 65
is actually clamped. When the operating lever 37 is further turned counterclockwise in FIG.
The convex surface portion 43A of the fixed cam body 36 fits into the concave surface portion 44B of the cam surface 44 of the fixed cam body 36, and the movable cam body 35
As the movable clamp 1 moves toward the fixed clamp 2 in the figure, the distance between the clamps 1 and 2 becomes narrower, and the metal conductors 64 and 65 move toward the fixed side. It is strongly pressed against the brazing filler metal 66. When the operating lever 37 is further turned counterclockwise in FIG. 2 from this state, the switch operating portion 37A of the operating lever 37 hits a switch (not shown).
By operating the switch, both metal conductors 64, 6 pass through the current-carrying terminals 48, 49 and the lower clamp arms 3, 4.
A current flows through the metal conductors 64 and 65, melting the silver brazing material 66, and brazing the metal conductors 64 and 65 together. Electricity to the metal conductors 64 and 65 is cut off after a predetermined time by a timer (not shown).

After brazing is completed, move the operating lever 37 to the second position.
Turn clockwise as shown. Then, the convex surface 43A of the cam surface 43 of the movable cam body 35 rides on the convex surface 44A of the cam surface 44 of the fixed cam body 36, and the movable clamp tool and the movable cam body 35 separate from the fixed clamp tool 2. direction, the gap between both clamping tools 1 and 2 widens, and then the spring operating pin 2
5 and 26 fall into the cam grooves 41 and 42, and both clamping tools 1 and 2 become temporarily clamped. When this state is reached, both the brazed metal conductors 64, 6
5 from both clamp tools 1 and 2. Note that when the distance between both clamping tools 1 and 2 is widened, since each clamping tool 1 and 2 is in the main clamp state, a force is applied to both metal conductors 64 and 65 in the direction of separating them, but the main clamping force is approximately 3.5 Kg, and if the brazed part is perfect, it will not break if pulled with this amount of force, so both clamp tools 1,
2 will slide open on each metal conductor 64,65. Therefore, at this time, an inspection was conducted to determine whether the brazed portion was complete.

The distance between both clamp tools 1 and 2 can be adjusted by a clamp tool movement stroke adjustment mechanism 56. That is, when the adjustment lever 60 is turned until it hits the stopper 63, the threaded cylinder 58 is screwed in together with the adjustment screw 59, and the tip of the adjustment screw 59 pushes the movable cam body 35, widening the gap between both clamp tools 1 and 2. . When the adjustment lever 60 is turned in the opposite direction until it hits the stopper 62, the threaded cylinder 58 moves back together with the adjustment screw 59, and the distance between the clamps 1 and 2 becomes narrower. When the metal conductors 64 and 65 are thick, the distance between the clamps 1 and 2 is widened, and when the metal conductors are thin, the gap is narrowed.

FIG. 11 is a diagram showing the relationship between the change in clamp pressure and the timing of pressure movement of the clamp tools 1 and 2 in the above-mentioned operation. Regarding the rotation angle of the operating lever 37, "front" refers to a state in which it is turned clockwise in FIG. 2, and "rear" refers to a state in which it is turned in a counterclockwise direction in FIG.

It is also possible to omit the clamp auxiliary spring 22 and obtain a temporary clamp state by changing the compression state of the clamp springs 23 and 24. Note that the spring 47 may be omitted and the cam surfaces may be brought into contact only by the force of the spring means 50.

(Effects of the Invention) As explained above, the metal conductor butt brazing machine of the present invention is equipped with a composite cam mechanism consisting of a movable cam body and a fixed cam body, and in the process of rotating the movable cam body, the metal conductor butt brazing machine is temporarily clamped. It is possible to operate the main clamp state, press the clamping tool, move the clamping tool, turn on electricity, etc. at the specified timing without fail, and even non-experts can easily perform butt brazing work on metal conductors. be able to. Further, according to the present invention, work efficiency is improved and connection work time can be shortened.

[Brief explanation of the drawing]

Fig. 1 is a front view of one embodiment of the brazing machine according to the present invention, Fig. 2 is a left side view of Fig. 1, Fig. 3 is a plan view of Fig. 1, and Fig. 4 is a front view of an embodiment of the brazing machine according to the present invention. A side view of a part of the movable cam body used, FIG. 5 is a right side view of FIG. 4, FIG. 6 is a front view of the fixed cam body used in this example, and FIG. 7 is a side view of FIG. , FIG. 8 is a vertical cross-sectional side view of the upper half of the screw tube used in this example, FIG. 9 is a right side view of FIG. 8, and FIG. 10 is a view of both metal conductors before brazing. FIG. 11, which is a partial front view showing an example of the butting state, shows a timing chart of changes in clamp pressure and movement of the clamping tool in the brazing machine of this embodiment. 1, 2...Clamp tool, 3, 4...Lower clamp arm, 5, 6...Upper clamp arm, 3A, 4
A, 5A, 6A...Conductor holding part, 7...Bracket,
8... Pivot pin, 9, 10, 11, 12... Insulating material,
13, 14, 15... Conductor insertion groove, 22... Clamp auxiliary spring, 23, 24... Clamp spring, 25, 2
6... Spring operation pin, 32, 33... Cam accommodation hole, 3
4...Compound cam mechanism, 35...Movable cam body, 36...Fixed cam body, 37...Operation lever, 37A...Switch operation section, 38...Insulation board, 39, 40...Movable cam body, 41, 42...Cam groove, 43 , 44...cam surface,
45...Cam shaft, 47...Cam biasing spring, 48, 49
...Power supply terminal, 50...Spring means, 51...Insulation stand, 5
6...clamp tool movement stroke adjustment mechanism, 64,
65...metal conductor, 66...brazing material.

Claims (1)

[Claims] 1. Two sets of clamping tools, each consisting of a lower clamp arm, an upper clamp arm, and a clamp spring that biases both clamp arms in the clamping direction, are arranged adjacently so that one of them can approach and move away from the other. The metal conductors to be brazed are individually clamped by the conductor holding portions of the lower clamp arm and the upper clamp arm of each of the clamp tools, and a brazing material is interposed between the abutting portions of the metal conductors. In a metal conductor butt brazing machine that brazes both metal conductors by applying current to the metal conductors in a state in which the metal conductors are in a state of The proximal end is slidably inserted into each of the lower clamp arms so as to receive one end of the arm, respectively, and each of the lower clamp arms has a movable side that controls the clamping force via each of the spring operating pins. Both ends of a compound cam mechanism that controls moving the clamping tool toward the fixed side of the clamping tool and applying abutting force to both metal conductors are respectively fitted and supported, and the movable side of the clamping tool is The composite cam mechanism is biased by a spring means so as to approach the clamping tool on the fixed side, and the composite cam mechanism has a cylindrical shape, and both ends thereof are rotatably fitted into cam housing holes in the lower clamp arms. A movable cam body that is fitted together, a fixed cam body that is fixed in a cam housing hole of a clamping tool on a fixed side facing an end surface of the movable cam body, and the movable cam body are rotated around their axes. and an operating lever for performing an operation, and a cam groove is provided on the outer periphery of the movable cam body to allow the spring operating pin to fall when facing the base end thereof,
Further, the opposing end surfaces of the movable cam body and the fixed cam body are configured such that when the movable cam body is rotated to a predetermined angle by operating the operating lever, the clamping tool on the movable side is moved in the direction of the clamping tool on the fixed side. A metal conductor butt brazing machine characterized in that each cam surface is provided with a movable cam surface.