KR100759859B1 - Automatic brazing system - Google Patents

Abstract

An automatic brazing machine which automatically performs a second process as a stepwise preheating process, a third process as a brazing process and a fourth process as an air cooling process when the worker carries out a first process as a loading and unloading process after a worker simply connects brazing objects to jig assemblies is provided. An automatic brazing system comprises: a disc type rotary workbench(20) intermittently driven in a direction with predetermined time intervals being secured between a first position that is a workpiece loading position, a second position rotated to 90 degrees of an angle from the first position, a third position rotated to 90 degrees of an angle from the second position, and a fourth position rotated to 90 degrees of an angle from the third position; four jig assemblies(30) which are mounted in an equal distance on an upper surface of an outer peripheral side of the rotary workbench, and have at least one pressure rod; a preheating part(50) which operably advances or retreats from a circumferential outer side relative to the rotary workbench toward the second position, and has at least one preheating torch nozzle(51); a brazing part(60) which operably advances or retreats from the circumferential outer side relative to the rotary workbench toward the third position, and has at least one brazing torch nozzle(61); and an air cooling part(70) which operably advances or retreats from the circumferential outer side relative to the rotary workbench toward the fourth position, and has at least one air jet(71).

Description

Automatic Brazing System {Automatic Brazing System}

1 is a front view of an automatic brazing apparatus according to the present invention.

2 is a plan view of an automatic brazing apparatus according to the present invention.

3 is a perspective view in a state in which the brazing object 44 is placed on the jig assembly 30 in the loading process.

4 is a side view showing the state before and after the coupling of the jig assembly 30 and the state in which the jig rotary motor 33 is in contact with the link member 36 to enable friction driving.

5 is a perspective view showing the positional relationship between the structure of the brazing work part 60 (preheating work part 50) and the jig assembly 30.

6 is a perspective view showing the positional relationship between the structure of the air cooling work unit 70 and the jig assembly 30.

7 is a plan view and a side view of various types of grinding tools capable of brazing with an automatic brazing apparatus according to the present invention.

<Drawing symbol>

10: main body

11: fixed workbench

13: leveling device

20: rotary worktable

30: jig assembly

32: lower jig

33: Jig Spinning Motor

34: Lower jig mounting part

36: link member

38: upper jig

40: upper jig mounting portion

42: pressing rod

44: brazing object

48: hydraulic pump absorber

50: preheating unit

51: preheat torch crater

52: Preheat Torch Crater

53: second forward and reverse means

60: brazing work part

61: Brazing Torch Crater

62: Brazing Crater

63: third forward and backward means

70: air cooling work part

71: air jet

72: Air Injection District

73: fourth forward and backward means

80: duct

90: control box

100: gas mixing box

110: radiation thermometer

122: grinding segment (polishing segment)

123: cup (disc)

Since the brazing process for joining the polishing segment or the grinding segment to the disk or the cup during the manufacturing process of the rotary tool with the diamond segment is conventionally performed by manual labor of the worker, It was slow and the productivity was low.

And, if the worker performs the brazing process by hand, the flux (FLUX) gas and LPG gas used for brazing may be delivered to the worker, which may be harmful to the human body, and the brazing operation may vary in quality and work speed according to the skill of the worker. Is large. In addition, because the brazing work is a high temperature in the working environment, even a skilled worker can not work for a long time, there is a limit to the amount of production.

In connection with the conventional automatic brazing welding apparatus, there is a utility model registration application No. 20-1988-0022221, but the cited proposal is a device that performs welding work while moving the welding object by the guide member in the longitudinal direction, so that the loading and The work efficiency is not higher than that of the automatic brazing device according to the invention, where the loading is possible at the same position. And the citation design lacks place constraints and mobility at installation. And, if the brazing portion is circular, it is difficult to braze or weld with the cited design without the rotation function of the fixing means. Therefore, there is a need for an automatic brazing device that can solve the above problems in a production site that requires a constant quality and fast production speed.

Therefore, in order to solve the problem of the conventional brazing device, the operator simply combines the brazing object with the jig assembly, and then cycles the second step of the preheating step, the third step of the brazing step and the air cooling step of the fourth step into one cycle. Therefore, the object of the present invention is to provide an automatic brazing machine that performs the second, third, and fourth processes when the operator performs only the loading and unloading of the first process.

In order to achieve the above object, the present invention provides an automatic brazing apparatus comprising: a first position which is a workpiece loading position, a second position pivoted 90 degrees from the first position, and a third position pivoted 90 degrees again from the second position; And the disk-shaped rotary worktable 20 is intermittently driven in one direction with a predetermined time interval between the fourth position rotated 90 degrees from the third position; Four jig assembly 30 having at least one pressing rod mounted on the outer circumferential side upper surface of the rotating work table 20 at equal intervals; A preheating work unit (50) having at least one preheating torch crater (51) which is operatively moved back and forth from the circumferential outer side to the second position with respect to the rotary work table (20); A brazing working part (60) having at least one brazing torch crater (61), which is operatively moved back and forth from the circumferential outer side to the third position with respect to the rotary work table (20); And an air-cooled working part 70 having at least one air injection port 71 that is operatively moved back and forth from the circumferential direction toward the fourth position with respect to the rotary work table 20. .

In this case, the upper jig 38 and the lower jig 32 coupled with the brazing object 44 may be fixed worktable 11 or lower part of the rotary work table 20 in the preheating process, the brazing process, and the air cooling process. It is preferable to be configured to rotate by friction drive by the jig rotation motor 33 provided in the (50, 60, 70).

In addition, when the jig assembly 30 is loaded and unloaded of the brazing object, the upper jig having the pressure rod is operatively lifted by a hydraulic or pneumatic cylinder, and the pressure rod 42 presses or presses the brazing object. It is preferred to configure it to be separated from the brazing object.

In addition, the upper jig 38 and the lower jig 32 to which the pressing rod 42 of the jig assembly 30 is attached are replaceable, and the torch craters 51 and 61 of the second and third processes are fourth and fourth. It is preferable that the air injection port 71 of the process is configured to be replaced, so that the brazing objects 44 of various sizes can be brazed.

Hereinafter, the configuration and operation of the automatic brazing apparatus according to the present invention will be described in more detail through examples.

1 is a front view of an automatic brazing apparatus according to the present invention. As shown in Figure 1, the present invention is installed in the main body 10, the main body 10 is preferably configured in the form of a prefabricated box consisting of a rectangular parallelepiped. And, only the front portion for the loading operation is configured in an open form. Although it is possible to install the automatic brazing device in an open space, in order to minimize the spread of harmful gases generated during brazing to other spaces or to change the position of the automatic brazing device as necessary, the inside of the box-shaped body 10 may be installed. It is desirable to install. And the lower surface of the main body is provided with a horizontal adjusting device 13 that can offset the unbalance of the height of the bottom surface inside the factory to install the automatic brazing device. The leveling device 13 has a height adjustment function, respectively, can move the automatic brazing device by the wheel. The upper part of the main body is provided with a duct 80 in which the roof and the suction port are integrated. Therefore, the combustion gas, the unburned fuel gas, the gas flux, etc. generated during the preheating process, the brazing process, and the air cooling process may be sucked into the upper portion of the main body and escape. This duct 80 structure is necessary to prevent the various gases generated during operation to prevent the brazing device from being diffused into the factory.

As shown in FIG. 1, the fixed worktable 11 is installed inside the main body 10, and a disk-shaped rotating worktable 20 is installed thereon. The fixed workbench 11 is configured in the form of a central portion for connection between the rotary worktable 20 and the motor 120 installed under the fixed worktable for rotation. The rotary work table 20 rotates the jig assembly 30 on which the brazing object 44 is mounted to a position for the next process after one process is completed. In this rotational movement, whether each working position has been reached is detected by a sensor such as a potentiometer (not shown), and the rotating work table is set to rotate by 90 degrees intermittently to a predetermined position. In addition, the time required for each process is preferably controlled in the same manner. Therefore, in the embodiment of the present invention, the second process, the third process, and the fourth process should be set to require various amounts of gas and process time so as to take the same time. Automation can be achieved.

And, when the rotary worktable 20 is rotated to move each of the working parts (50, 60, 70) to be described later, the forward state (working state) and the retreat state (standby state) and the rotary worktable 20 of such work The rotational movements of the two shall not interfere with each other. Specifically, when the time required for each process is set to be the same, the rotary workbench rotates by 90 degrees at the interval. At this time, when each working part is in the advanced state, the respective working parts 50, 60 and 70 and the jig assembly 30 collide with each other. Therefore, each of the working parts 50, 60, and 70 must be positioned in the reverse state before the rotary worktable on which the jig assembly is installed makes the intermittent rotational movement. The forward and backward rotation of the work unit (50, 60, 70) and the rotation of the rotary workbench first calculates the time required for the process to rotate the rotary worktable 20 by 90 degrees periodically at the time interval, each of the work unit 50, 60 and 70 may be driven by a timer (not shown) which retracts before the scheduled time of rotation of the rotary work table 20 and advances after the scheduled time of stop of the rotary work table 20. However, in addition to these methods, intermittent rotation and forward / backward operations can be automated using various methods such as programming using position sensors and angle sensors.

The operator may separate the brazing completed grinding tool from the jig assembly 30 returned to the first position (loading position) after completing the fourth process (air cooling process) and load a new brazing object. This first step (loading step) is also an advantage of the present invention is a step that does not require skill of work.

In addition, in the embodiment of the present invention, there is a control box 90 in the main body 10 having a switch or the like for checking the temperature in each process, adjusting the amount of gas used, and igniting a torch or the like. . In addition, a paste dispenser (not shown) capable of applying brazing paste may be installed near the main body in the first process, which is a loading process. However, since the random dispenser is configured to apply the brazing paste in the first process, Whether to perform before the process can be selected depending on the type and nature of the brazing object. In addition, a gas mixing box 100 is installed below the stationary work bench 11 to mix gases used in each process. Gas used in the second step (preheating step) and the third step (brazing step) of the embodiment of the present invention uses a mixture of LPG, LNG, acetylene and oxygen. The gas mixing box 100 may be configured in a form that can be controlled through the control box 90. The gas mixing box 100 may be directly physically manipulated, but the control box 90 may be configured to check the temperature of each process and the like, and to adjust the mixing ratio of the gas through feedback.

As shown in FIG. 1 or FIG. 2, the jig assembly 30 is installed on the rotary work table 20 so that the jig assembly 30 also supports the brazing object 44 when the rotary work table 20 rotates. In the installed state, it will rotate to the working position for the next process. Then, on the fixed worktable 11, the preheating work part 50, the brazing work part 60, and the air-cooling work part 70 are provided at positions rotated by 90 degrees clockwise from the loading position (first position). Each working part 50, 60, 70 is configured to be capable of forward and backward by respective forward and backward means 53, 63, 73.

3 is a perspective view of a state before coupling of the brazing object 44 mounted on the upper jig 38 and the lower jig 32. That is, FIG. 3 shows a state of a loading process. Since the jig assembly 30 is coupled to the rotary working table 20 and rotates, the upper jig 38 and the lower jig 32 constituting the jig assembly 30 should be directly or indirectly fixed to the rotary working table. Therefore, since the upper jig 38 can not be directly installed on the rotary workbench, the upper jig 38 is installed on the upper jig installation part 40 having a "a" shape. The upper jig installation portion 40 is fixed to the rotary worktable, one end is installed by the lifting means by a hydraulic or pneumatic cylinder that can lift the upper jig 38 up and down, the upper end is installed hydraulic pump ( Go up and down by operation of 48). In the loading step, the elevated upper jig 38 is lowered to fix the brazing object 44, and in the unloading step, the lowered upper jig 38 is lifted to separate the brazing object 44.

The loading and unloading process of the brazing object 44 is performed by an operator. In order to perform the unloading, the upper jig 38 to which the pressing rod 42 is attached must be raised, and the lifting operation at this time is the upper jig. It is made to the hydraulic pump 48 for manipulating the lifting of the hydraulic or pneumatic cylinder installed in the fixed portion 40, the hydraulic pump 48 can be installed on the rotary work table 20 near each jig assembly 30 have. Then, the operator can lift the upper jig 38 to separate the brazing object 44 from the jig assembly 30 that has reached the loading position by rotating and moving after the fourth step (air cooling step).

The upper jig 38 does not directly press the brazing object, and the pressing rod 42 installed in the upper jig 38 in the direction of the lower jig 32 presses the brazing object 44. The pressing rod 42 is installed along the circumference of the upper jig, and is alternately installed inward and outward on the outer side of the upper jig alternately according to the length of the segment of the brazing object 44. The brazing site can then be evenly pressed. The reason for the pressing of the pressing member is that if the brazing object moves during the brazing process, a defect may occur in the brazing. In addition, the pressing rod 42 should use a metal having a higher melting point than the working temperature in the second and third processes.

In addition, the automatic brazing apparatus according to the present invention should be able to braze various types of disk-type grinding tools, so that the upper jig 38 and the lower jig 32 having the pressing rod 42 may be replaced according to the size of the brazing shape. When the preheating torch crater 51, the brazing torch crater 61, and the air sprayer 71 are configured to be replaced in the respective fixing parts 52, 62 and 72, discs of various sizes The grinding tool can be brazed.

And the lower jig mounting portion 34 that can install the lower jig 32 corresponding to the position of the upper jig mounting portion 40 is installed on the rotary workbench. The lower jig mounting portion 34 and the upper jig mounting portion 40 may be integrally formed in the form of "c", or may be installed as an independent member separate from the upper jig mounting portion 40. The jig assembly 30 of FIG. 3 according to the present invention is shown as two separate members 40, 34 separate. The lower jig mounting portion 34 is fixed to the rotary worktable 20, and the link member 36 installed at the other end of the lower jig mounting portion 34 supports the lower jig 32 upward and downwards. Is rotatably coupled through the lower jig mounting portion 34, and the portion is projected under the rotary workbench is packed with rubber (packing).

In FIG. 4, the jig rotation motor 33 is in contact with the link member 36 of the jig assembly so as to be frictionally driven. The upper jig 38 and the lower jig 32, to which the brazing object 44 is coupled, are rubbed by the jig rotation motor 33 for rotating the link member 36 during the second, third and fourth processes. Rotate by drive. In the second, third and fourth processes, the preheating work part 50, the brazing work part 60, and the air-cooling work part 70 are rotated by the rotary work table 20, and thus the brazing object 44 is mounted. When the jig assembly 30 is moved to the next process position, the jig assembly 30 is configured to retreat to the standby state by the forward and backward means 53, 63 and 73, respectively. Therefore, each of the working parts 50, 60 and 70 moves forward and backward and repeats the working and standby states. In order to enable the moving parts 50, 60 and 70 to move forward and backward, a preheating torch When the crater 51 and the brazing torch crater 61 and the air injection port 71 completely surround the circumference of the brazing object in the working state, the respective work units 50, 60 and 70 cannot enter and exit the respective work units. Do not wrap the brazing object in the direction in which (50, 60, 70) advances back and forth. Therefore, if the upper jig 38 and the lower jig 32 coupled to the brazing object during the process are not rotated, only a specific part is heated and there is a portion of the brazing object 44 that does not reach the flame, so that uniform brazing Can not expect Therefore, uniform heating of the brazing object is proportional to the quality of the brazing, so that the upper jig 38 and the lower jig 32 to which the brazing object 44 is coupled are rotated during the second, third and fourth processes. Should be. In order to rotate the upper jig 38 and the lower jig 32 to which the brazing object 44 is coupled, the upper jig 38 provided with the pressing rod 42 also rotates when the lower jig 32 rotates. Jig 38 should be installed in the upper jig mounting portion 40. In order to configure the upper jig mounting portion 40 and the link member 36 to be rotatable, a coupling (not shown) may be coupled to the coupling portion.

At this time, the jig rotation motor 33 may be installed on the fixed worktable 11 or the respective work parts 50, 60, and 70 below the rotary worktable 20. Since each of the working parts is moved forward and backward, when the jig rotation motor 33 is installed in each of the working parts 50, 60 and 70, the rubber packing of the link member 36 is performed at the respective working forward positions. It comes in contact with the bottom.

5 shows the preheating work 50 or the brazing work 60 and the jig assembly 30. The preheating work unit 50 or the brazing work unit 60 includes a plurality of thin pipe-shaped torch craters 51 and 61 installed with nozzles in the injection hole and the torch craters 51 and 61 and constitutes a hydraulic or pneumatic cylinder. It consists of pre-warming means 53 and 63 and pre-heating torch crater fixing parts 52 and 62 connecting the torch craters 51 and 61 to the forward and backward advance means 53 and 63. In the second, third, and fourth processes, the preheating unit 50, the brazing unit 60, and the air cooling unit 70 respectively rotate the rotary work table so that the brazing object moves forward and backward. (53, 63, 73) consists of a structure for reversing to the standby state. At this time, the forward and backward means is composed of a hydraulic or pneumatic cylinder in the embodiment of the present invention. The basic structure of the preheating work 50 or the brazing work 60 is the same, but there are differences in the type of gas used and the presence of the radiation thermometer 110. The purpose of the second step (preheating step) is to raise the temperature of the brazing object 44 to below the melting point of the filler metal before the third step (brazing step). The third step is a process of bonding the brazing object through melting of the filler metal. When molten metal is exposed to air during high temperature processes, the metal can oxidize, leading to a deterioration in brazing quality. Therefore, the ideal brazing process is preferably to raise the temperature above the melting point of the filler metal in a short time, so in the preheating process, the preheating operation is raised to the temperature just before the melting point of the filler metal, and from this temperature, the brazing temperature (the melting point of the base metal at the melting point of the filler metal) is increased. It is preferable to heat up as fast as possible (below temperature), and a preheating process is required. However, in the third process, it is preferable that the work be completed within a short time, but it is necessary to prevent the temperature rise above the melting point of the base metal, so it is necessary to adjust the temperature of the third process by installing a radiation thermometer.

6 shows an air cooling work unit 70. An air injection port 71 composed of a plurality of thin pipes uses compressed air to braze the object 44. Basic back and forth mechanism is the same as the preheating work 50 and the brazing work 60. Since it is an operation to cool the metal using air, it is not necessary to wrap the brazing object in a circle like a preheating torch crater or a brazing torch crater, so if the air cooling operation is possible, the fourth forward and backward means 73 and the jig rotation motor ( 33 may be any component.

7 shows an example of a brazing object 44 according to the present invention. Rotary tools used for polishing, grinding and cutting operations with diamond segments attached. When brazing the rotary circular tool, it is possible to use the automatic brazing apparatus according to the present invention. Grinding or polishing segment 122 is attached to cup 123 by brazing operation. In addition to the tool illustrated in FIG. 7, an automatic brazing apparatus according to the present invention may be used when fabricating various types of disk-shaped brazing tools.

According to the automatic brazing apparatus of the present invention, when the worker simply couples the brazing object to the jig assembly, productivity is improved by performing the second step of the preheating step, the third step of the brazing step, and the air cooling step of the fourth step. Brazing quality can be guaranteed.

Claims (5)

Between the first position, the workpiece loading position, the second position pivoted 90 degrees from the first position, the third position pivoted 90 degrees again from the second position, and the fourth position pivoted 90 degrees again from the third position. A disc-shaped rotary worktable 20 intermittently driven in one direction at a predetermined time interval; Four jig assembly 30 having at least one pressing rod mounted on the outer circumferential side upper surface of the rotary work table 20 at equal intervals; A preheating work unit (50) having at least one preheating torch crater (51) which is operatively moved back and forth from the circumferential outer side to the second position with respect to the rotary work table (20); A brazing working part (60) having at least one brazing torch crater (61), which is operatively moved back and forth from the circumferential outer side to the third position with respect to the rotary work table (20); And And an air-cooling work unit (70) having at least one air injection port (71), which is operatively moved back and forth from the circumferential direction toward the fourth position with respect to the rotary work table (20). Brazing device. The method of claim 1, The jig assembly 30 includes an upper jig 38 and a lower jig 32, The upper jig 38 and the lower jig 32 to which the brazing object 44 is coupled are attached to the stationary worktable 11 or the respective work units 50, 60, 70 during the preheating process, the brazing process, and the air cooling process. Automatic brazing device characterized in that the rotation by the friction drive by the jig rotation motor 33 is installed. The method according to any one of claims 1 to 2, When the jig assembly 30 loads and unloads the brazing object, the upper jig 38 having the pressure rod is operatively lifted by a hydraulic or pneumatic cylinder, and the pressure rod 42 presses or presses the brazing object. Automatic brazing device, characterized in that configured to be separated from the brazing object. The method according to any one of claims 1 to 2, The upper jig 38 and the lower jig 32 to which the pressing rod 42 of the jig assembly 30 is attached are replaceable, and the torch craters 51 and 61 of the second and third processes and the air of the fourth process are replaced. It is configured to replace the injection port 71, the automatic brazing device, characterized in that configured to be capable of brazing the various sizes of the brazing object (44). The method of claim 3, The upper jig 38 and the lower jig 32 to which the pressing rod 42 of the jig assembly 30 is attached are replaceable, and the torch craters 51 and 61 of the second and third processes and the air of the fourth process are replaced. It is configured to replace the injection port 71, the automatic brazing device, characterized in that configured to be capable of brazing the various sizes of the brazing objects (44).

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