JPH0217267B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a saw tip brazing machine that brazes a cemented carbide tip to the teeth of a saw.

(Prior art) Conventionally, a special jig was used to manually braze a chip to the teeth of a saw, but this method had extremely low work efficiency and was difficult for the operator to feel. Because I had to rely on them, I was unable to perform highly accurate brazing work. Since then, various automatic brazing machines have been developed with the aim of automating this manual work and improving work efficiency and precision, but the current state of the art is that no one has yet been able to provide a satisfactory product.

(Problems to be Solved by the Invention) The present invention was developed in view of these conventional problems, and is an ideal saw that has high working efficiency and can perform brazing with excellent accuracy. The purpose is to provide a chip plow attachment machine.

(Means for Solving the Problems) In order to achieve the above object, the present invention includes a fixed base on the housing and a movable body that moves back and forth above the fixed base, and a brazing base is provided at the front end of the fixed base. a forward and backward transfer path, a chip supply device that supplies chips one by one at the rear end of the transfer path, and a notch at the tip of the extrusion rod that shows the side surface of the chip and silver solder transferred onto the brazing table. The movable body is equipped with a push-out rod which is fed onto the chip plowing table supplied to the transfer path, and a push-out rod which pivotally supports a loop-shaped silver solder and whose tip is placed on the brazing table. a silver solder supply device that supplies the top surface of the chip, a cutter that cuts the silver solder supplied onto the chip to the length of the chip, and a silver solder heating device provided on one side of the brazing table. , a saw tip brazing machine in which the saw blade is pivoted on the front side of the brazing table so that the sawtooth part can move toward and away from the brazing table, and a saw supporting device with a feeding mechanism for the sawtooth part is arranged. After feeding cemented carbide chips to the rear end of the transfer path by the chip feeding device, the movable body is moved forward,
The chip is held in a notch formed at the tip of the extrusion rod and transferred onto a brazing table, and the silver solder is advanced by a certain length using a silver solder supply device, and its tip is placed on top of the chip. Next, this chip is held between the notch of the extrusion rod and the chip side holding rod, and after being positioned at a predetermined location on the brazing table,
Cut the silver wax to the length of the chip with a cutter,
Next, move the sawtooth section waiting in front of the brazing table onto the brazing table, press the chip and silver solder with this sawtooth section, move the chip side holding rod and the movable body back, and then braze. A heating device installed on one side of the table heats the chip, the silver solder, and the serrations, melts the silver solder, and brazes the chip to the serrations. Subsequently, the saw support device moves the saw forward from the brazing table, and the tooth feed mechanism moves the saw by one tooth so that the next sawtooth section corresponds to the brazing table, and the above operation is repeated sequentially to reach all the sawtooth sections. The structure is such that the chips can be brazed.

(Embodiment) Next, an embodiment of the saw tip plowing machine according to the present invention will be described based on the drawings. 1 is a cross section L established on the table 3 at the upper end of the housing 2.
It is a fixed stand for the mold. Reference numeral 4 denotes a forward-rearward transfer path formed on the fixed base 1, and is formed by the upper surface of the fixed base 1 and a protrusion 5 disposed in the front-rear direction. Further, a brazing stand 6 made of ceramic is detachably connected to the front end of the transfer path 4. a is a chip supply device attached to the middle part of the fixed base 1;
The device a includes a chip supply path 7 in the left and right direction whose one side end communicates with the rear end of the transfer path 4, and the chip supply path 7.
a shooter 8 with its lower end facing the middle part of the shutter 8; and a protruding rod 10 for pushing out chips 9 supplied one by one from the shooter 8 to the chip supply path 7 onto the transfer path 4.
The protruding rod 10 is moved laterally by a drive mechanism A to be described later. Incidentally, chips 9 supplied from the shooter 8 are placed on the chip supply path 7.
a damper 11 that prevents the chips from moving toward the transfer path 4 side and releases the chips from moving by operating the protruding rod 10;
is provided. Reference numeral 12 denotes a chip side holding rod attached to the front end of the fixing table 1, and the chip side holding rod 12 moves to the left in FIG. and serves to fix the chip 9 in a predetermined position. Further, this holding rod 12 is moved left and right by a drive mechanism B, which will be described later.

Next, reference numeral 13 is a movable body that moves back and forth above the fixed base 1 by a drive mechanism C to be described later. Reference numeral 14 denotes a push-out rod for the chips 9 that projects from the front end of the movable body 13 and moves back and forth on the transfer path 4 as the movable body 13 moves back and forth. A holding plate 16 for the chip 9 provided with a matching notch 15 is detachably attached. b
is a silver row supplying device equipped on the movable body 13, which includes a support shaft 18 that supports the loop-shaped silver row 17 on the movable body 13, a payout roll 19 for the silver row 17,
The lower presser roll 20 and the feed roll 1
The pulse motor 21 is directly connected to the motor 9. Reference numeral 22 denotes a silver bar 17 cutter mounted on the front end of the movable body 13 so as to be vertically movable, and the cutter 22 is driven by an air cylinder 23.
c is a high-frequency heating device fixed on the table 3, and a heating element 25 connected to the high-frequency generator 24;
on one side of the brazing table 6, that is, the chip side holding rod 1
It is installed on the opposite side to 2.

d is a saw support device installed in front of the brazing table 6. This support device d includes a support d ₁ that penetrates the table 3 so as to be movable back and forth and up and down, and a support frame 2 that is connected to the support d ₁ so as to be movable left and right.
6, and the support _d1 has four bearing tubes 30 mounted on a slide plate 29 arranged to be moved back and forth along a pair of left and right guide rails 27, 27 on the table 3 by operating a handle 28. The pillars 31 are vertically movably passed through the bearing tube 30, and the lower end of each pillar 31 is fixed to the lower plate 32 and the upper end to the upper plate 33. A vertically movable drive mechanism D ₁ (described later) includes a vertical plate 35 hanging from the lower surface of the slide plate 29 and a longitudinally movable drive mechanism D 1 (described later).
Connected to D ₂ . In addition, a bearing cylinder 37 is provided at the upper end of the support frame 26 which is arranged on the support body d ₁ so as to be moved left and right by the operation of the handle 36, and the support shaft 3 is attached to the upper end of the support frame 26.
8 is rotatably supported, and the rear end of the mounting plate 40 of the saw 39 is fixed to the tip of this support shaft 38.
A mounting shaft 42 of a saw 39 is protruded from an adjustment piece 41 that is fitted into the saw 39 so as to be movable back and forth. In addition, the mounting plate 40
is provided with a saw clamping device f that clamps both sides of the saw, but this mechanism clamps both sides of the saw 39, which is rotatably supported on the mounting shaft 42, except during tooth feeding. A frame body 43 whose one end is fixed to a mounting shaft 42 has a fixing piece 44 that comes into contact with one side of the saw 39, and an air cylinder 45.
A movable piece (not shown) that moves forward and backward and presses the other side surface of the saw 39 is provided.

e is a sawtooth part 46 equipped on the saw support device d.
A rotating shaft 48 is provided at the front end of a support arm 47 that projects forward from the bearing tube 37,
A drive mechanism E, which will be described later, is connected to one end, and the upper end of a swinging arm 49 is fixed to the other end.A thrusting rod 50 is attached in an arc shape to the lower end of this swinging arm 49. A claw 51 is provided to protrude horizontally.

Next, each drive device in the above embodiment will be explained. A is the protruding rod 10 in the chip feeding device a.
The drive mechanism is a guide 52 provided on the fixed base 1.
The protruding rod 10 is fixed to the upper end of a movable plate 53 that moves left and right along the axis, and the upper end of an L-shaped rod 54 whose bent portion is pivoted to the housing 2 is connected to the lower end of the movable plate 53. The lower end of the camshaft 5 is disposed inside the housing 2 and has a motor 55 connected to one end thereof.
It engages with the upper surface of the cam plate 57 at 6. B
is a drive mechanism for the chip side holding rod 12, which includes a movable plate 59 that moves left and right along the guide 58 of the fixed base 1.
The holding rod 12 is fixed on the top, the upper end of an L-shaped rod 60 whose bent part is pivoted to the fixed base 1 is connected to the lower end of the movable plate 59, and the lever lever 61 whose middle part is pivoted to the housing 2 is connected. One end of the cam plate 62 is connected to the cam shaft 56.
The other end of this lever lever 61 and the side end of the L-shaped lever 60 are connected by a connecting rod 63. C is a drive mechanism for the movable body 13, which is installed vertically from the lower surface of the movable body 13 and is connected to the guide 6 in the fixed base 1.
The upper end of an L-shaped rod 66 whose bent portion is pivoted to the housing 2 is connected to a support piece 65 that moves back and forth along the camshaft 56, and one end of a lever lever 67 whose intermediate portion is pivoted to the housing 2 is connected to the support piece 65 that moves back and forth along the camshaft 56. The other end of the lever rod 67 and the side end of the L-shaped rod 66 are connected by a connecting rod 69. D ₁ is a drive mechanism for vertical movement of the saw support device d, in which a roller 70 at the lower end of the support rod 34 hanging down from the lower end of the support d ₁ is connected to one of the lever rods 71 whose intermediate portion is pivoted to the housing 2. The other end of the lever lever 71 engages with the lower surface of the cam plate 73 of the camshaft 56 so as to be able to move toward and away from the sliding surface 72 on the upper side surface. D ₂ is a drive mechanism for back and forth movement of the saw support device d, and the support d ₁
An adjustment screw 74 is screwed into a vertical plate 35 hanging from the slide plate 29, and the upper end of an L-shaped rod 75 whose middle portion is pivoted to the housing 2 is engaged with the tip of this adjustment screw 74. The side end of the shaped rod 75 is attached to the cam shaft 56.
The upper surface of the cam plate 76 is engaged with the upper surface of the cam plate 76 . Further, the vertical plate 34 has an L-shaped rod 75 at the tip of the adjustment screw 74.
It is urged by a spring 77 in a direction in which it is always in pressure contact with the upper end. E is a feeding device e of the sawtooth section 46
This drive mechanism has a crank 78 protruding from one end of the rotating shaft 48, and one end of a lever 79 whose intermediate portion is pivoted to the housing 2 is engaged with the lower surface of the cam plate 80 on the cam shaft 56. The other end of the lever 79 and the tip of the crank 78 are connected by a connecting rod 81. Reference numeral _S4 is a limit switch for operating the saw clamping device f.

Next, the operation of the above embodiment will be explained with reference to FIG. After adjusting the angle and the position of the mounting shaft 42, when the motor 55 is rotated at a low speed, the drive mechanism A of the chip supply device a is operated in the state shown in FIG. The chips 9 supplied to the supply path 7 are sent out onto the transfer path 4 and fit into the notch 15 at the tip of the protruding rod 14 that was waiting on the transfer path 4, resulting in the state shown in FIG. 62. Then, the protruding rod 10 returns to its original position by the reverse operation of the drive mechanism A, and at the same time, the drive mechanism C of the movable body 13 starts operating and the movable body 13 moves forward. Along with this, the chip 9 is transferred onto the brazing table 6 by the pushing rod 14, and becomes in the state shown in FIG. 6, 3. At this time, the limit switch _S1 is closed, the pulse motor 21 rotates slightly, and the silver solder 17 is fed out by the length of the chip 9, and its tip is placed on the chip 9 which has been transferred to the brazing table 6. Next, the drive mechanism B of the chip side holding rod 12 is activated to move the holding rod 12 forward, and the tip 9 of the holding rod 12 and the notch 15 of the push-out rod
is held in a predetermined position on the brazing table 6, resulting in the state shown in FIG. 6. In this state, the drive mechanism D of the saw support device d starts operating, and the sawtooth part 46 to be brazed, which was waiting diagonally in front of the brazing table 6, moves above the brazing table 6, and the silver is Descend above 17. At this time, the cam plate 7
Since the small diameter portion 3 corresponds to the lever rod 71, the saw support device d is lowered by its own weight, and as a result, the saw tooth portion 46 presses the silver solder 17 and the tip 9 onto the brazing table 6, resulting in the state shown in FIG. becomes.

Next, limit switch S ₂ closes and cutter 2
The cutter 22, in which the second cylinder 23 is activated, descends and cuts the tape-shaped silver solder 17 at the rear end of the chip 9. When the cutter 22 rises due to the reverse operation of the air cylinder 23, the drive mechanisms B and C of the holding rod 12 and the movable body 13 operate in reverse, causing the holding rod 1 to rise.
2 and the push rod 14 are moved back to the state shown in FIG. 6. In this state, the limit switch _S3 is closed and the heating element 25 of the high frequency heating device C turns the silver rod 1
7 is melted and the sawtooth part 46 and chip 9 are heated to a high temperature, and the brazing of the chip 9 to the sawtooth part 46 is completed. Thereafter, the saw drive mechanism D operates in reverse and the soldered sawtooth section 46 retreats diagonally forward of the brazing table 6, and the drive mechanism E operates and is fed by one teeth by the feed pawl 51. After the reverse operation, the above operation is repeated again, and the chips 9 are successively brazed to each sawtooth section 46.

(Effects) As described above, the saw tip plowing machine according to the present invention supplies the chips to the transfer path, transfers the chips and silver solder to the brazing stand as the movable body moves forward, and holds the protruding rod and side surface. Holding the chip in a fixed position with a rod, pressing the silver solder and the chip with the serrated part, cutting the silver solder with the cutter, retracting the holding rod and movable body, melting the silver solder with the heating device, retracting the serrated part, and feeding the tooth. These operations are repeated in sequence to automatically and efficiently braze the chip to the sawtooth section.

In particular, the chip and the silver solder are accurately held in a predetermined position on the brazing table by the protruding rod and the holding rod, and the sawtooth portion descends onto the upper surface of the chip and the silver solder while being held in this state. It is possible to perform highly accurate brazing without causing the chip and the silver solder to shift from the sawtooth part due to vibrations of the machine or the like.

Furthermore, when brazing with a heating device, the holding rod, protruding rod, loop-shaped silver solder, and cutter are retracted from the brazing table to prevent damage to these components due to high-temperature heating, ensuring high precision over a long period of time. It is possible to braze the chips.

[Brief explanation of drawings]

Fig. 1 is a partially longitudinal front view showing an embodiment of the saw tip plowing machine according to the present invention, Fig. 2 is a partially longitudinal sectional side view of the same, Fig. 3 is a plan view of the same, and Fig. 4 is an implementation of the same as the above. FIG. 5 is a side view showing the main parts of the example; FIG. 5 is a perspective view showing the main parts of the embodiment; FIGS. 6 and 6 are explanatory diagrams showing the operating order of the embodiment. 1; Fixed base, 2; Housing, 3; Table,
4; Transfer path, 6; Brazing table, a; Chip supply device, 12; Chip side holding rod, 13; Movable body, 1
4; extrusion rod, 15; notch, b; silver solder supply device, 22; cutter, c; heating device, 25; heating element, d; saw support device.

Claims (1)

[Claims] 1. A fixed table is provided on the housing, and a movable body that moves back and forth above the fixed table is provided. It is equipped with a chip feeding device that feeds the chips, and a chip side holding rod that advances and retreats the tip onto the brazing table. A pushing rod that supports the loop-shaped silver solder and supplies its tip to the top surface of the chip on the brazing table, and a silver solder supply device that cuts the tip of the silver solder superimposed on the chip. a cutter, a heating device for silver solder is provided on one side of the brazing table, and a saw blade is pivotally supported on the front side of the brazing table so that the sawtooth part approaches and separates from the brazing table, A saw tip plow attaching machine characterized in that a saw supporting device is provided with a saw tooth feeding device.