KR20040013622A - Heat treatment equipment of chain linking pin - Google Patents

Abstract

PURPOSE: An apparatus for heat treating chain connection pin is provided to improve productivity extraordinarily and reduce detect ratio as maintaining durability of chain as it is by arranging heating coil at upper and lower sides of bearing resting part so that heat treatment is performed on the bearing resting part only. CONSTITUTION: The apparatus(1) for heat treating chain connection pin comprises a supply part(3) for supplying connection pins(2) on which an end part is formed to both sides of bearing resting part so that the connection pins(2) are uniformly aligned by installing an inclined guide(8) at the exit side of bowl feeder(7) vibrated by vibration motor(6); a transfer heat treatment part(4) comprising a pair of installation stands(10) which are oppositely set up, and at a lower center of which a transfer groove(9) is formed so that the connection pins(2) supplied from the guide(8) are moved to the transfer groove(9), a driving pulley(11) which is axially installed at the front of the installation stands(10), and on the edge of both sides of which belt groove(11a) is formed, a pulley(14) connected to motor(12) and belt(13) and axially installed on driving pulley shaft(11b) projected to an outer side of the installation stands(10) to drive the driving pulley(11), several driven pulleys(15) oppositely directed to each other and arranged at the installation stands(10) at both sides in front of the driving pulley(11) so that coil spring type transfer belt(16) is wound on the driven pulleys(15) and surface contacted with an end part of both sides of the connection pins(2) supplied to the transfer groove(9) to transfer the connection pins(2), and a heating coil(17) wired at upper and lower sides of the transfer groove(9) in front of the driving pulley(11) to heat the bearing resting part of the connection pins(2) transferred along the transfer groove(9); and a cooling part(5) which is arranged at a lower part of an outer side of the transfer heat treatment part(4) and consisted of water tank(18) and cooling unit(19) installed at the water tank(18), and pump(20) so that the heated connection pins(2) dropped to the water tank(18) are cooled, and the heated water is supplied to the water tank(18) in the state that the heated water is cooled by the cooling unit(19).

Description

Heat treatment equipment of chain linking pin}

The present invention relates to a heat treatment apparatus for a chain link pin, and more particularly, to provide a heat treatment apparatus for a chain link pin to rapidly heat-treat only a portion of a small size of a connection pin, that is, a bearing seat portion to which a bearing is coupled. will be.

The chain is widely used as a power transmission means for various industrial machines, and its configuration consists of bearings and plates formed at the center of the bearings and plates in the state of continuously placing plates having a constant pitch on both sides of rolling bearings. It is fixed by connecting the connecting pins and then riveting the ends of the connecting pins.

In the case of the connecting pin is heat treated for the purpose of improving the durability of the chain.

Usually, the heat treatment of the connecting pin may be performed only in the bearing settled part where the bearing is placed. However, due to the characteristic of the small size of the connecting pin, the entire connecting pin is heat-treated. Therefore, the end of the connecting pin is connected with the bearing and the plate. Difficult to be riveted, the workability is reduced, there is a problem such as high work failure rate, the industry is urgently required a means to solve this problem.

Therefore, the present inventors researched and developed the present invention by not having a great influence on the durability of the chain even when heat-treating only the bearing settled portion in which the bearing is placed.

That is, in the present invention, by placing a heating coil in the center of the connection pins to be aligned in order, that is, the upper and lower sides of the bearing set portion, the heat treatment can be performed only on the bearing set portion, thereby maintaining productivity while maintaining the durability of the chain. The present invention has been completed with the technical problem of the present invention in order to significantly improve and reduce the defective rate.

1 is an enlarged perspective view of a connection pin heat treated by the present invention

Figure 2 is a schematic plan view showing an embodiment of the present invention

3 is a cross-sectional front view of the heat treatment unit of the present invention

Figure 4 is a side cross-sectional view for showing a state that is heat treated by the present invention

■ Explanation of symbols used in main part of drawing ■

1: chain connecting pin heat treatment device 2: connecting pin

2a: bearing set 2b: end

3: supply unit 4: transfer heat treatment unit

5: Cooling section 6: Vibration motor

7: ball feeder 8: guide

9: Transfer groove 10: Mounting table

11: Driving pulley 11a: belt groove

12: motor 13: belt

14: pulley 15: driven pulley

16: Transfer Belt 17: Heating Coil

18: water tank 19: cooling device

20: pump

1 is an enlarged perspective view of a connection pin heat treated by the present invention, Figure 2 is a schematic plan view showing an embodiment of the present invention, Figure 3 shows a cross-sectional front view of the heat treatment of the present invention, Figure 4 is Side cross-sectional view for showing a state that is heat treated by the present invention, the configuration of the present invention will be described below.

The present invention, the chain connecting pin heat treatment apparatus 1 is a supply part 3 for aligning and supplying the connection pin 2 with the end 2b formed on both sides of the bearing setter 2a, and a connection supplied from the supply part 3. The transfer heat treatment part 4 which transfers the fins 2 and heat-processes it simultaneously, and the cooling part 5 which cools the connection pins 2 heat-treated rapidly.

The supply part 3 is provided with an inclined guide 8 for guiding and supplying the connecting pin 2 to the outlet side of the cochlear ball feeder 7 vibrated by the vibration motor 6. It is widely used to align parts.

The transfer heat treatment unit 4 stands a pair of mounting tables 10 facing each other such that the transfer groove 9 is formed at the lower center so that the connecting pins 2 supplied from the guide 8 move. At the front end, the drive pulley 11 having the belt grooves 11a formed on both side edges is axially mounted, and the pulley connected to the motor 12 and the belt 13 is mounted on the drive pulley shaft 11b drawn out of the mounting table 10 ( The shaft 14 is installed to enable the driving pulley 11 to be driven.

The connecting pins (2) which are arranged on both side mounts (10) in front of the driving pulley (11) are placed on the transfer belt (16) of the coil spring type by placing several driven pulleys (15) facing each other. And the heating pins 17 are wired to the upper and lower sides of the transfer groove 9 in front of the driving pulley 11, and are transported along the transfer groove 9 by being interviewed with both end portions 2b. The center portion of the connecting pin 2, that is, the bearing settle portion (2a) to be able to heat. At this time, it is preferable that the transfer belt 16 of the coil spring type uses stainless steel having excellent heat resistance, and the number of driven pulleys 15 can be added or subtracted according to the size of the connecting pin 2 or the like.

And the mounting table 10 can be installed inclined downward from the supply unit 3 side to the cooling unit 5 side, the preferred inclination angle is about 10 °.

In the case of the heating coil 17 is used in the form of water injected into the copper pipe to maintain a constant temperature at all times.

The cooling unit 5 is disposed at an outer lower end of the transfer heat treatment unit 4, which consists of a water tank 18, a cooling device 19 installed in a water tank 18, and a pump 20. The heated connection pins 2 falling to the tank 18 are cooled, and the heated water is supplied to the water tank 18 while being cooled by the cooling device 18.

In the drawings, reference numeral 21 shows a bearing for allowing the driving pulley 11 and the driven pulley 15 to be smoothly rotated.

The chain connecting pin heat treatment apparatus 1 of the present invention configured as described above is capable of intensively heating and heat treating only the central bearing settling portion 2a of the connecting pin 2, according to the operation of the present invention below. The operation and the like will be described.

First, when the vibration motor 6 is operated in a state in which the connecting pin 2 is accommodated in the ball feeder 7 of the supply part 3, the connecting pin 2 moves upward along the cochlear ball feeder 7. It is supplied to the inclined guide 8 and is supplied to the transfer groove 9 of the transfer heat treatment unit 4.

Both end portions 2b of the connecting pins 2 supplied to the conveying groove 9 are spring-type conveying belts 16 connecting the driving pulley 11 and the driven pulley 15 as shown in FIGS. 3 and 4. ) Is clouded along the transfer groove 9 in an interview state. At this time, the center portion of the connecting pin (2) that is conveyed along the conveying groove (9), that is, the bearing settle portion (2a) is heated evenly by the heating coil (17) wired on the upper and lower sides of the conveying groove (9). At this time, when the mounting table 10 is inclined downward from the supply part 3 side to the cooling part 5 side, the connecting pin 2 moving along the conveying groove 9 has a rolling motion of its own conveyance belt 16. The pressing force is transmitted at the same time to achieve a smooth movement.

As described above, the connection pins 2, which are transported and heated along the guide groove 9 of the transfer heat treatment unit 4, are dropped into the water tank 18 disposed below the end of the transfer heat treatment unit 4, thereby rapidly cooling. When the surface heat treatment of the connecting pin (2) is completed. At this time, the water in the water tank 18 is circulated to the cooling device 19 by the pump 20 to be always cooled.

According to the chain connecting pin heat treatment apparatus 1 of the present invention configured and operated as described above, the connecting pins 2 are aligned and supplied to the transfer heat treatment unit 4 through the supply unit 3, and the transfer heat treatment unit 4 is provided. In the state in which the central bearing settled portion (2a) of the connecting pin (2) in the heating state by dropping to the water tank 18 to quench the heat treatment can be made, according to the present invention is small chain connecting pin (2) Since only the central part of heat treatment can be intensively heat treated, riveting can be easily performed while maintaining the durability of the chain, thereby improving productivity, extending the life of the riveting machine, and reducing the defective rate of the chain. It is a very excellent invention whose effect is expected.

Claims (2)

An inclined guide 8 is provided toward the exit of the ball feeder 7 vibrated by the vibration motor 6 to align and supply the connecting pins 2 having the ends 2b formed on both sides of the bearing setter 2a. Supply part 3, A pair of mounting brackets (10) facing each other such that the transfer groove (9) is formed in the lower center so that the connecting pin (2) supplied from the guide (8) is moved, and the belts at both edges at the tip of the mounting bracket (10) Shaftly install the drive pulley 11 formed with the groove 11a, and the pulley 14 connected to the motor 12 and the belt 13 on the drive pulley shaft 11b guided out of the mounting table 10, The driving pulley 11 is driven, and several driven pulleys 15 facing each other are disposed on both side mounts 10 in front of the driving pulley 11 and walked by the coil spring type conveying belt 16 to the conveying groove 9. The connecting pin 2 is interviewed with both ends 2b of the connecting pin 2 supplied to the connecting pin 2, and the heating coil 17 is wired to the upper and lower sides of the conveying groove 9 in front of the driving pulley 11. A transfer heat treatment part 4 for heating the bearing settling portion 2a of the connecting pin 2 conveyed along the groove 9, It is disposed on the outer lower end of the transfer heat treatment unit 4, consisting of a water tank 18 and a cooling device 19 and a pump 20 installed in the water tank 18 is heated to fall into the water tank 18 Cooling connection pin (2), the chain connection pin heat treatment apparatus characterized in that it consists of a cooling unit (5) to be supplied to the water tank (18) in the heated water is cooled by the cooling device (19). The method of claim 1, The mounting table 10 is a chain connection pin heat treatment apparatus, characterized in that inclined downward by about 10 ° from the supply part (3) side to the cooling part (5) side.