KR101503363B1 - Tip welding method and welding machine of tip for circle saw - Google Patents

Abstract

The present invention relates to an apparatus to weld a tip for a circular saw having a portable heating unit, and a method to weld a tip using the same. A high frequency coil to dissolve a material can be moved in all directions, and a preheating and centering work and a main heating and heat annealing work can be performed in order, thereby adhesion of a tip to be welded to a sawtooth part is improved. Centering can be accurately performed with respect to a sawtooth part of a tip to be bonded, thereby welding is robust and a circular saw with excellent quality is manufactured. A heat annealing work is performed, thereby durability of a welding part is improved. Moreover, the end of a high frequency coil surrounds both sides of a tip to be welded, thereby unnecessary loss of heat caused by reduction of a heating range can be prevented. Therefore, welding efficiency is improved.

Description

Technical Field [0001] The present invention relates to a tip welding apparatus for a round saw having a movable heating unit, and a tip welding method using the tip welding apparatus.

The present invention relates to a welding portion of a welding apparatus for welding a carbide tip or a sintered mate tip to a circular saw, and more particularly, A tip welding apparatus for a circular saw having a movable heating unit for improving the welding power and enabling accurate bonding of the tip to be welded and bonded, in particular, for minimizing thermal expansion due to reduction in the heating range, and And a tip welding method using the same.

Generally, in the case of a circular saw which is used for rotation, high-speed rotation causes high temperature and abrasion due to severe friction of its teeth. Therefore, unlike a round top shank part, its hardness is very high and its hardness is required However, because of the price and manufacturing process, it is not possible to form the entire circular saw with a tip (carbide tip or sermat tip), so that a separate tip is formed and welded to the tooth portion to increase the hardness of the tooth only by the tip .

Thus, a welding apparatus for welding a tip to a circular saw is used as described above. Such a welding apparatus has been proposed as Patent Application No. 10-0198726.

When performing the welding of the tip using such a circular saw-top welding apparatus, a high frequency coil is used to heat and dissolve the welding material such as silver, and then the tip is brought into contact with the tooth portion in a state where the welding material is formed on the tip, So that the tip is welded and bonded.

However, in the conventional welding method as described above, since the high-frequency coil merely dissolves the welding material, the welding can not be firmly performed in the process of welding the tip to the toothed portion, There is a problem that a circular saw is not welded at an accurate position, and a thermal expansion of the circular saw is caused due to a wide heating range of the high frequency coil and exposure to all directions.

Korean Patent Application Registration No. 10-0198726.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a high frequency coil capable of moving upwardly, downwardly, leftwardly and rightwardly so as to dissolve a soldering material, wherein the preheating and centering operations, It is possible to improve the adhesive strength of the tip welded to the toothed portion and to precisely center the toothed portion of the bonded tip so that it is possible to manufacture a circular saw with high quality welding and excellent quality, The present invention provides a tip welding apparatus for a circular saw having a movable heating unit for further improving the strength of a tip, and a tip welding method using the same.

A tip welding apparatus for a circular saw having a movable heating unit for further improving the welding efficiency by preventing the unnecessary heat loss due to the reduction of the heating range by covering the both sides of the tip to which the end of the high frequency coil is welded, Another object of the present invention is to provide a tip welding method.

In order to achieve the above-mentioned object, a welding means is formed at the center of the main body, a top mounting portion is provided on the left side of the welding portion, and a welding member supplying portion (on the right side is formed with a flux supplying portion, A tip welding apparatus for a circular saw,

Forming a heating unit on the welded portion,

The heating unit includes:

A heating unit mount vertically formed on the main body and having a fixing block formed on the front surface thereof;

A horizontally movable table coupled to the fixed block of the heating unit mount so as to be slidable left and right and having a first actuator formed therein and a first protruding and detaching rod coupled to one side of the fixed block and a protruding bar protruding forward;

A guide member protruding from the right side of the protrusion of the horizontally movable band, a vertical guide portion formed on the guide member with a guide rod slidably formed vertically;

And the second actuator is coupled to the guide member 231 through the connecting rod through the through hole, and the second actuator is coupled to the guide member 231 through the connecting rod. A vertically moving base coupled with the second evacuation / loading rod and moving up and down; And

And a high-frequency generator which is formed at a lower end of the vertical moving band and has a high-frequency coil inclined downward in front of the high-

A preliminary heating step (S100) in which the circular saw is pressed and clamped by a pressure pusher while the molten material is dissolved in the tip by using a high frequency coil and the primary material is melted by using a high frequency coil, ;

A tip centering step (S200) of adjusting the center of the toothed portion by moving the clamp by clamping the tip before the heating of the high-frequency coil 251 and the pressing force of the pressing pusher after the preliminary heating;

After centering the tip, remove the clamping of the tip and press the circular saw by the pusher so that the tip is completely bonded to the serrations of the circular saw, and at the same time, Heating step S300;

After the main heating, the pressing operation of the pressurizing pusher is released, the tip sheet is retracted, and the circular saw is subjected to short heating using a high frequency coil (S400) before rotating the saw so that the sawtooth portion moves You can.

As described above, according to the present invention, there is provided a tip welding apparatus for a circular saw having a movable type heating unit and a tip welding method using the same, wherein the preheating, main heating, centering and annealing operations are performed by moving the high frequency coil up, So that it is possible to achieve excellent welding power and at the same time to weld the tip to the correct position and to improve the durability of the welded portion by the heat releasing operation.

Further, in performing the welding, the heating part of the high-frequency coil surrounds the tip and performs heating, thereby minimizing the heat loss due to the reduction of the heating range. Thus, the welding efficiency can be further improved.

BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a front whole view of a tip welding apparatus for a circular saw having a movable heating unit according to the present invention. Fig.
Fig. 2 is a main part showing a welding portion and a heating unit of a tip welding apparatus for a circular saw having a movable heating unit according to the present invention. Fig.
3 is a perspective view of a heating unit of a tip welding apparatus for a circular saw having a movable type heating unit according to the present invention.
4 is a flowchart showing a welding method of a tip welding apparatus for a circular saw of the present invention.
5 is a preliminary heating step using a tip welding apparatus for a circular saw having a movable heating unit according to the present invention.
6 is a view of a tip centering step using a tip welding apparatus for a circular saw having a movable heating unit according to the present invention.
7 is a view showing the present heating step using a tip welding apparatus for a circular saw having a movable heating unit according to the present invention.
8 is a thermal annealing step using a tip welding apparatus for a circular saw having a movable heating unit according to the present invention.

The terms and words used in the present specification and claims should not be construed as limited to ordinary or dictionary terms and the inventor may appropriately define the concept of the term in order to best describe its invention It should be construed as meaning and concept consistent with the technical idea of the present invention.

Therefore, the embodiments described in the present specification and the configurations shown in the drawings are merely the most preferred embodiments of the present invention, and not all of the technical ideas of the present invention are described. Therefore, It should be understood that various equivalents and modifications may be present.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a front view of a tip welding apparatus for a circular saw having a movable heating unit according to the present invention.

As shown in Fig. 1, the tip welding apparatus for a circular saw having a movable heating unit according to the present invention is characterized in that a welding portion 20 is provided at the center of the main body 10, as in Patent Application No. 10-0198726 filed by the applicant of the present invention A tip mounting portion 30 is provided on the left side of the welding portion 20 and a tip portion moving portion 60 is formed on the right side of the welding portion 20 and is composed of a welding material supplying portion 40, a flux supplying portion 50, a tip moving portion 60, From the welding apparatus,

2 and 3, a heating unit 200 is formed on the welding portion 20. The heating unit 200 includes a heating unit mount 211, a horizontal moving table 220, A vertical guide part 230, a vertical moving part 240, and a high frequency generator 250.

Here, the heating unit mounting base 211 is formed of a block-shaped support vertically installed at the rear of the welded portion 20, and a fixed block 210 having a horizontal length is formed in front of the support.

The horizontal movement table 220 has a block shape having left and right movement forces coupled to the fixed block 210 so as to be slidable left and right. The horizontal movement table 220 includes left and right sliding structures of the horizontal movement table 220, It may be possible to couple the fixed block 210 and the horizontal movement table 220 by means of a groove or a projection or by a rail or the like.

A first actuator 222 is fixedly formed on the horizontal moving table 220 to provide a moving force of the horizontal moving table 220. The first actuator 222 is fixed to the first moving table 220 222a are fixed on the left side of the fixed block 210. [

That is, when the first evacuation rod 222a is pulled out by the operation of the first actuator 222 and the first actuator 222 supports the fixed block 210 to which the first evacuation / The horizontal moving table 220 is slid to the right side and the horizontal moving table 220 is moved to the left side by the pulling force when the first evacuation / loading rod 222a is retracted.

The protrusion 221 protrudes forward from the horizontal movement table 220. The protrusion 221 is disposed eccentrically to the right of the horizontal movement table 220.

The vertical guide part 230 is formed on the protrusion 221 of the horizontal movement table 220 to serve as an upward and downward movement guide.

At this time, the vertical guide part 230 has a guide member 231 protruding from the right side surface of the protrusion 221, and the guide member 231 is provided with one or more guide rods (Not shown).

The vertical movement table 240 is formed in a block shape having a vertical length and is configured to be slid up and down according to the sliding movement of the guide rod 232. The upper and middle portions are respectively provided with engagement projections 241, A spring 242 is mounted on the upper and lower surfaces of the coupling protrusions 241 and 241 'and the guide member 231, respectively. .

A through hole 243 is formed at the center of the vertical movement table 240 and the through hole 243 is formed through the through hole 243. The connection hole 245 is fixed to the guide member 231, The second actuator 244 is vertically formed in the connecting rod 245. The second rod 244a which is projected and retracted by the operation of the second actuator 244 is fixed to the vertical moving rod 240 in the downward direction, do.

That is, when the second evacuation rod 244a is pulled out by the operation of the second actuator 244 and the vertical moving bar 240 is pushed downward while the second evacuation / And the second actuator 244 is accommodated in the through hole 243 so that the vertical movement table 240 can be moved in the vertical direction. So that it is not interfered with.

The high frequency generator 250 is for fixing an end of the coil to generate heat and generate heat, and is fixed to the lower end of the vertical movement table 240.

A high frequency coil 251 is formed in front of the high frequency generator 250 so as to face the top mounting portion 30 while facing downward and generating a high temperature at the end portion.

At this time, the high frequency coil 251 is formed with a tip receiving groove 251a having a "C" shape whose end is open upward and downward from the top mounting portion 30 side.

On the other hand, a cylindrical pusher 300 for rotating the circular saw 1 is rotatably formed at the rear of the top mounting portion 30, and the pusher 300 has a pivoting member 320 formed at the rear thereof And a pushing rod 301 which is protruded and retracted at a tip end thereof is formed and installed in a pusher guider 310 which is vertically installed.

That is, the pusher guider 310 is vertically formed with a guide hole 311 at the center thereof and is fastened to the guide hole 311 by an adjusting bolt 340 passing through the pivoting member 320, The pressing pusher 300 is pivoted about the adjusting bolt 340 by the tightening force of the pressing rod 301 according to the size of the circular saw provided in the top mounting portion 30. Accordingly, And is rotatably adjustable toward the tooth portion.

In addition, the pressing rod 301 presses the outer peripheral serration portion of the circular saw by the protruding and retracting operation, thereby giving an adhesive force and interrupting the rotation of the circular saw.

Hereinafter, a tip welding method using the tip welding apparatus for a circular saw having the movable heating unit of the present invention will be described.

First, referring to Fig. 1, a circular saw 1 is mounted on a top mounting portion 30 like the first ordinary welding apparatus.

The tip 80 is fed from the tip feeder 70 to the tip moving part 60 and the tip 80 is moved to the tip sheet 61 by the tip moving part 60 and supported by the clamp 62 .

Thereafter, the tip 80 is moved to the welded portion 20 in a state of being opposed to the tip sheet 61. Thereafter, by applying the flux and supplying the flux, the tip 80 of the circular saw 1 And the tip 80 is welded to the tooth 2.

4, the preheating step S100, the tip centering step S200, and the preheating step S100 are repeated for the welding of the tip 80 moved to the welding part 20 as described above. The heating step S300, and the annealing step S400 may be performed.

First, prior to welding, the high-frequency coil 251 is used to melt the molten metal on the tip 80 and enter the tooth portion in a state of being dropped.

2 and 3, the preliminary heating step S100 is a step in which the pressurizing rod 301 is drawn out by the operation of the pressurizing pusher 300 as shown in Fig. 5 so as to surround the circular saw 1 So that the saw blade 2 to be welded is brought into contact with the welding material formed on the tip 80. As a result,

 Thereafter, the clamping of the clamp 62 fixing the tip 80 is released, and the high frequency coil 251 is moved into the space where the clamp 62 is opened and the tips 80 The tip 80 is bonded to the tooth portion 2 in a predetermined manner. As shown in Fig.

At this time, the temperature of the high-frequency coil 251 can be set to a temperature sufficient to dissolve only the molten metal of the contact portion of the tooth portion 2.

Thereafter, the tip centering step S200 is performed,

As shown in FIG. 6, in the state where the primary bonding heating is performed as described above, the pressing force of the pressing pusher 300 is released and the high-frequency coil 251 is released from the tip.

The clamped tip is then clamped to the center of the toothed portion 2 of the circular saw 1 in the plane and the tip 80 by the adjustment of the clamp 62 Adjust it to match.

Meanwhile, the process of adjusting the center as described above should be performed before the welding material that maintains the adhesive strength between the tip 80 and the teeth 2 is hardened.

Thereafter, the main heating step S300 is performed,

As shown in Fig. 7, welding and bonding are performed in a state where the centers of the tip 80 and the teeth 2 are adjusted. In the step of clamping the tip 80, the high frequency coil 251 is used The secondary bonding heating of the molten metal may be performed in a state in which the high frequency coil 251 enters the gap between the clamps 62 again opened and the tip 80 is wrapped in the tip accommodating groove 251a formed at the end.

The pressing portion 301 is pulled out from the pressing pusher 300 to push the toothed portion 2 formed on the circumference of the circular saw 1 so as to press the toothed portion 2 to be welded, 80).

At this time, the temperature of the high-frequency coil 251 may be such that the temperature of the high-frequency coil 251 is higher than the temperature of the primary bonding so that the molten iron is completely dissolved and the tip 80 is completely bonded to the teeth 2.

Thereafter, the annealing step (S400) is performed,

The pressing force for pressing the tip 80 is released by pulling the pressing rod 301 of the pressing pusher 300 as shown in Fig. 8, and at the same time, the tip sheet 61 is retracted.

At this time, short heating is performed once again by using the high frequency coil 251 used in the main heating step (S300) before the circular saw 1 is rotated one round to the next step, so that the heat applied to the welding part is gradually reduced, .

In the heat-annealing step S400 as described above, the metal material is heated to an appropriate temperature, and then slowly cooled to room temperature to remove the internal cracks in the hardened material due to processing or quenching, thereby improving the durability of the welded portion .

The tip welding operation of the circular saw is completed by the welding method as described above. Then, it is obvious that the high frequency coil 251 after completion of the thermal annealing step (S400) is restored to its original state. It is a matter of course that the saw tooth 2 of the circular saw 1 is pressed by the pressing rod 301 of the spindle 300 and the saw tooth 2 is rotated by one turn.

The high frequency coil 251 is moved by the operation of the heating unit 200 and the movement of the horizontal moving table 220 by the first actuator 222 and the movement of the second moving table 220 by the second actuator 222, The left and right movement and the upward and downward movements are possible by the movement of the high frequency generator 250 in accordance with the movement of the vertical movement table 240 by the actuator 244. The detailed operation of the operation is described above.

The pressing pusher 300 is capable of rotating the pivoting member 320 by the input of the adjusting bolt 340 and the pivoting member 320 can be rotated by rotating the pivoting member 320, It is possible to control the protruding and retreating direction of the pressing rod 301 to the tooth portion 2 depending on the size of the pressing portion 301. [

As described above, according to the present invention, there is provided a tip welding apparatus for a round saw having a movable type heating unit and a tip welding method using the same, wherein preheating, centering, main heating and thermal annealing are performed in welding the tip, It is possible.

10: main body 20: welded portion
30: top mounting portion 40:
50: flux supply part 60: tip moving part
61: tip sheet 62: clamp
70:
200: heating unit 210: heating unit mounting table
211: fixed block 220: horizontal moving table
221: protruding portion 222: first actuator
222a: first evacuation rod 230: vertical guide part
231: guide member 232: guide rod
240: vertical movement band 241, 241 ': coupling projection
242: spring 243: through hole
244: second actuator 244a: second attracting /
245: Link 250: High frequency generator
251: high-frequency coil 251a: tip accommodating groove
300: Pressurizing pusher 301: Pressurizing rod
310: pusher guider 311: guide ball
320: pivoting member 340: adjusting bolt

Claims (4)

A welding portion 20 is formed at the center of the main body 10 and a top mounting portion 30 is provided on the left side of the welding portion 20 and a welding member supplying portion 40 and a flux supplying portion 50 are provided on the right side, (60) and a tip feeder (70), characterized in that:
A heating unit (200) is formed on the welding portion (20)
The heating unit (200)
A heating unit mount 211 formed vertically to the main body 10 and having a fixing block 210 formed on a front surface thereof;
A first actuator 222 is formed and a first protruding and retracting rod 222a is coupled to one side of the fixed block 210. The first actuator 222 is coupled to the fixed block 210 of the heating unit mount 211, And a horizontal movement table 220 having a protrusion 221 protruding forward from the other side thereof;
A guide member 231 is protruded from the right side of the protrusion 221 of the horizontal movement table 220 and a guide bar 232 is formed in the guide member 231 so as to be vertically penetrated, (230);
A coupling protrusion 241 and a coupling protrusion 241 'are formed at the upper and middle portions of the guide bar 232 and are connected to the upper and lower ends of the guide bar 232 in a tangential manner by a spring 242. A through hole 243 is formed at the center, A vertical moving table 240 in which the second actuator 244 is coupled to the guide member 231 through the connecting rod 245 via the hole 243 and the second throwing and unloading rod 244a is coupled to move up and down; And
And a high frequency generator (250) formed at a lower end of the vertical movement table (240) and having a high frequency coil (251) inclined downward at a front end to generate high temperature at the end thereof. Tip welding equipment for sawing.
The method according to claim 1,
The end of the high-frequency coil 251 is formed with a tip receiving groove 251a having a "C" shape opening upward and downward from the side of the top mounting portion 30. The circular tip Welding apparatus.
The method according to claim 1,
The top mounting portion 30 may further include a pressing pusher 300,
The pressurizing pusher 300 has a pressing rod 301 projecting and retracting at its tip end, a pivoting member 320 formed at its rear end,
The main body 10 is formed with a pusher guider 310 having a guide hole 311 formed at the center thereof and coupled to the guide hole 311 of the pusher guider 310 by the pivoting member 320, Characterized in that it comprises a movable heating unit.
A welding method for welding a tip to a toothed portion of a circular saw,
A preliminary heating step (S100) in which the circular saw is pressed and clamped by a pressure pusher while the molten material is dissolved in the tip by using a high frequency coil and the primary material is melted by using a high frequency coil, ;
A tip centering step (S200) of adjusting the center of the toothed portion by moving the clamp by clamping the tip before the heating of the high-frequency coil 251 and the pressing force of the pressing pusher after the preliminary heating;
After centering the tip, remove the clamping of the tip and press the circular saw by the pusher so that the tip is completely bonded to the serrations of the circular saw, and at the same time, Heating step S300;
After heating, the pressing force of the pressurizing pusher is released, the tip sheet is retracted, and the circular saw is rotated at a low speed by performing short heating using a high-frequency coil before rotating the saw so as to move the sawtooth section. Wherein the tip is welded to the tip of the circular saw.

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