KR100348861B1 - Automatic welding system for recycling cylinder block having apparatus for controlling welding nozzle - Google Patents

Abstract

The present invention provides an automatic welding device for regenerating a cylinder block capable of adjusting or cleaning a welding nozzle so as to stably and effectively perform a welding operation. The welding nozzle adjusting device added to the automatic welding device includes a brush for removing a spatter that may be formed on the welding nozzle of the welding gun, and the welding to prevent the spatter from being formed in the welding nozzle. A spatter-proof liquid applicator for applying a spatter-proof liquid to the nozzle, a cutter for adjusting a wire, an origin inspector for catching the origin of the welding nozzle, and a plurality of spots for detecting the position and movement of the welding nozzle It may include a proximity sensor.

Description

AUTOMATIC WELDING SYSTEM FOR RECYCLING CYLINDER BLOCK HAVING APPARATUS FOR CONTROLLING WELDING NOZZLE}

The present invention reliably stabilizes the corresponding portions of the cylinder block so that the cylinder head seating portion and cylinder liner upper assembly portion, cylinder liner lower assembly portion, and main bearing can be correctly seated and assembled to regenerate the cylinder block of a medium or large engine. The present invention relates to an automatic welding device for regenerating a cylinder block that can be welded, and more particularly, to an automatic welding device for a cylinder block having a welding nozzle control device capable of cleaning or adjusting a welding nozzle.

In general, railway vehicles, generators, ships, etc. are equipped with a medium or large engine to generate a corresponding level of power. A cylinder liner is built into the cylinder block of such a medium and large engine, and a piston is reciprocated therein.

On the other hand, the cylinder block of such an engine mainly wears the cylinder head seating portion and the cylinder liner upper assembly portion, the cylinder liner lower assembly portion, and the main bearing assembly portion when worn for a long time. Accordingly, in order to regenerate and use the cylinder block, the places must be welded and then reworked.

However, the welding process of this part for regenerating the cylinder block of the conventional medium and large engines is mostly performed manually. Accordingly, there is a problem that the difference in the precision and quality of the welding is deepened according to the skill of the operator who performs the welding.

In particular, there is a problem that the generation of arc or poor welding can be caused because the welding nozzle of the welding mechanism can not be cleaned or adjusted.

Therefore, the present invention has been invented to solve the above-mentioned problems, the object of the present invention is to simply clean the welding nozzle, to prevent the spatter of the nozzle, can cut the welding rod to the appropriate length, welding The present invention provides a cylinder block automatic welding device capable of accurately correcting a position.

Figure 1 is a side view showing the overall configuration of the automatic cylinder block welding device before the welding nozzle adjustment device is installed.

Figure 2 is a front view of the automatic cylinder block welding device of Figure 1;

Figure 3 is a side view showing a state of welding one cylinder liner upper assembly with the welding device of Figure 1;

Figure 4 is a side view showing a state of welding the other cylinder liner lower assembly with the device of Figure 1;

Figure 5 is a side view showing a state of welding a portion of the main bearing assembly with the apparatus of Figure 1;

Figure 6 is a side view showing a state of welding one cylinder liner lower assembly with the device of Figure 1;

7 is a side view showing a state of welding another part of the main bearing assembly with the apparatus of FIG.

Figure 8 is a side view showing a state of welding the other cylinder liner upper assembly with the apparatus of Figure 1;

9 is a side view showing the fixing pin in the welding device of FIG.

10 is a side view of the reducer before mounting the fixed roller to the welding device of FIG.

11 is a side view showing a limit switch installation state in the welding device of FIG.

Figure 12 is a side view showing the overall configuration of a welding device according to the present invention equipped with a welding nozzle control device.

Figure 13 is a side view showing in detail the welding nozzle control device installed in the welding device of Figure 12;

14 is a front view of FIG. 13;

♠ Explanation of the symbols for the main parts of the drawings.

10: cylinder block 12: support device

20,22: fixed roller 24: drive device

28: drive motor 30: reducer

34: fixing device 42, 44: fixing piece

46: transfer device 50: guide rail

52: support member 60: welding mechanism

76: welding nozzle adjusting device 78: brush

82: cutting machine 92: central control unit

The objects of the present invention are a support device for rotatably supporting a cylinder block, a drive device installed on the support device, and a cylinder head seating portion and cylinder liner upper assembly of the cylinder block to rotate the cylinder block. A welding mechanism for welding the cylinder liner lower assembly portion and the main bearing assembly portion, a transfer device for moving the welding mechanism to a welding execution position along the longitudinal direction of the cylinder block, the driving device, the welding mechanism, and the In the automatic welding device for cylinder block regeneration comprising a central controller for controlling the transfer device and a welding nozzle adjusting device for cleaning and adjusting the welding nozzle of the welding mechanism, the welding nozzle adjusting device is a welding of the welding gun Brush for removing spatter which may be formed in the nozzle, and the welding nozzle Patterning may be accomplished by an automatic welding apparatus for reproducing a cylinder block, it characterized in that it comprises an anti-spatter fluid is applied to application of the spatter inhibitor solution to the welding nozzle in order to prevent (spatter) forms.

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

First, referring to FIGS. 1 and 2 showing the side view and the front view of the cylinder block automatic welding device according to the present invention before the welding nozzle device is installed by the ease of explanation, the automatic welding device may identify the cylinder block 10 to be regenerated. And a support device 12 for fixing. The support device 12 has a base 14 installed on the ground or a predetermined floor.

The base 14 is provided with four support rollers on its upper surface to rotate the cylinder block 10. More specifically, each support roller has two support roller pairs on both sides of the base 14, that is, the first support roller pair 16 (see FIG. 1) and the second support roller pair 18 (see FIG. 2). ). In this embodiment, only two support roller pairs for supporting the largest cylinder block 10 are illustrated in solid lines, but, for example, when welding a medium or large cylinder block smaller than this, it is shown as a dotted line. One of the second support roller pairs 18 'may be selected and used.

In addition, a fixed roller is rotatably installed on each support roller pair. For example, a first fixing roller 20, on which one side of the cylinder block 10 is detachably fixed, is rotatably disposed on the first support roller pair 16, and a cylinder block (2) on the second support roller pair 18. The second fixing roller 22 to which the other side of 10) is detachably fixed is rotatably engaged.

One side of the base 14 of the support device 12 is provided with a drive device 24 for providing power for actually rotating the cylinder block 10. The driving device 24 receives a rotational force from the mounting bracket 26 mounted on the support device 12, the driving motor 28 fixed to the mounting bracket 26, and the driving motor 28. It is provided with a reducer 30 for stably rotating the fixed roller (20, 22) or the cylinder block (10). Of course, since the first fixed roller 20 is detachably fixed to the reducer 30, when the reducer 30 is driven to rotate, the fixed rollers 20 and 22 are simultaneously rotated to rotate the cylinder block 10. .

On the other hand, as shown in Figure 3 to 9, in order to stably fix the cylinder block 10 in a predetermined various welding position, a plurality of fixing holes are drilled in the first fixing roller 20. That is, the first fixing roller 20 is the cylinder block 10 is first installed in the reference hole 32 which can be set in the welding ready position, and the first to set the cylinder block in various welding positions as will be described later Preferably, the fifth to fifth fixing holes 32a, 32b, 32c, 32d, and 32e are drilled (Fig. 8). Correspondingly, a fixing device 34 is provided in the base 14 (Fig. 9). Fixing device (34) is a fixing pin fixed to the bracket (36) fixed to the base 14 and the bracket 36 and releasably fixed to each fixing hole 32 formed in the first fixing roller (20) It consists of 38.

In addition, as shown in FIG. 10, one side of the reduction gear 30 is provided with a plurality of positioning sensors 40 for detecting the rotation angle of the cylinder block, that is, the rotation angle of the first fixing roller 20. . Each positioning sensor 40 is preferably formed as a proximity sensor, and of course, a reference line (not shown) formed on the outside of the first fixing roller 20 may be indexed or provided. It is preferable.

In addition, the installation position of each positioning sensor 40, as will be described later, is to be respectively installed at a predetermined position corresponding to the position where each welding portion of the cylinder block can be most suitably welded by the welding robot. desirable.

On the other hand, in order to stably fix the cylinder block 10 to each fixed roller, the inner surface of the first fixing roller 20 is provided with a fixing piece 42, and also the inner surface of the second fixing roller 22 Also, the fixing piece 44 is provided (FIG. 9). Of course, the fixing bolts 42 and 44 may be provided with fixing bolts so that both sides of the cylinder block 10 are stably fixed to the respective fixing rollers 20 and 22.

In addition, one side of the support device 12, for example, is provided with a transfer device 46 to which the welding mechanism described later is movable. The conveying device 46 is a guide rail 50 which is fixed to the ground or the floor by a base 48 similar to the base 14 of the supporting device 12, and reciprocates along the longitudinal direction with respect to the guide rail 50. It is possible and actually provided with a support member 52 to which the welding mechanism described later is mounted. In addition, the conveying device 46 is preferably provided with a conveyor (54) to reciprocate the support member 52 with respect to the guide rail (50). Optionally, the lower portion of the support member 52 in contact with the guide rail 50 is preferably provided with a guide roller 56 for smooth reciprocating movement of the support member 52.

As shown in FIG. 11, the transfer device 46 includes a plurality of limit switches 58 capable of detecting an initial position of the support member 52 with respect to the base 48 or the guide rail 50 and a reference position during movement. Is preferably installed. Each of these limit switches 58 may serve as a stopper for setting the initial position of the welding mechanism or the moving position, which will be described later, as well as preventing the return from the initial position at the end or complete termination of the work. will be.

In addition, a welding mechanism 60 for actually welding the cylinder block 10 is installed on the upper surface of the support member 52. The welding mechanism 60 is preferably formed in the form of a robot. The welding mechanism 60 is basically a connector 62 which is operably fixed to the support member 52 by a bracket, and is also movably fixed to the connector 62 and actually welds the welding wire W to the cylinder block ( And a welding gun (66) having a welding nozzle (64) for melting and adhering to (10). Optionally, the welding mechanism 60 is preferably provided with a tension holding device 68 for preventing the welding wire W from being relaxed or overexpanded. Of course, the welding wire supply device 70 for continuously supplying the wire to the welding mechanism 60 is installed in place of the support member 52. The welding wire supply device 70 has a roller 72 in which the welding wire W is unwound and a hooking tool 74 for stably holding the wire between the roller 72 and the welding gun 66. ) Is provided.

In particular, as shown in Figures 12 to 14, the automatic welding device for regenerating the cylinder block according to the present invention is provided with a welding nozzle adjusting device 76 for cleaning or adjusting the welding nozzle. In more detail, the welding nozzle adjusting device 76 is provided with a cleaning device for cleaning the nozzle 64 formed in the welding gun 66 of the welding device 60, that is, the nozzle 64 in the continuous use of the welding device. It is rotatably provided with a brush 78 for brushing off or cleaning spatters that may be formed.

In addition, the welding nozzle adjusting device 76 is provided with a spatter preventing liquid applicator 80 in which a spatter preventing liquid is stored to minimize or prevent formation of spatters in the nozzle 64.

In addition, the welding nozzle adjusting device 76 includes a cutter 82 for properly adjusting the length of the wire W when the wire W is exposed longer than necessary at the nozzle of the welding mechanism 60. . In this way, generation of an arc can be prevented by keeping the length of the wire W at an appropriate length.

In particular, the welding nozzle adjusting device 76 includes a welding nozzle origin checker 84 for checking, detecting, and correcting a change in the welding position when an operation error of the welding tool and other peripheral devices occurs during long-term use of the welding tool. , The origin checker 84 is formed with a tip for inspecting the exact position of the nozzle 64, it is preferable that a guide 86 for guiding the nozzle to the tip is formed.

In addition, the welding nozzle adjusting device 76 includes two proximity sensors 88 for detecting and confirming the position of the welding gun 66 or the welding nozzle 64 of the welding mechanism 60 or the front, rear, left and right operations. (90).

Of course, all the operating elements constituting the cylinder block automatic welding device according to each embodiment as described above are connected to the central control unit 92, so that the cylinder block automatic welding device can be operated automatically as a whole.

Hereinafter, the operation and automatic mode of operation of the automatic cylinder block welding apparatus according to the present invention will be described in detail.

First, the operator places the cylinder block 10 to be reproduced in the base 14 of the support device 12 in a state of shifting the lifter using a lift device such as a hoist. Then, one side of the cylinder block 10 is fixed to the first fixed roller 20, and the other side is fixed to the second fixed roller 22. In fact, one side of the cylinder block 10 is bolted to the fixing piece 42 provided inside the first fixing roller 20, the other side to the fixing piece 44 provided inside the second fixing roller 22. It is fixed stably by bolts. On the other hand, the fixing pin 38 of the fixing device 34 in the reference hole 32 formed in the first fixing roller 20 before or when the cylinder block 10 is mounted to each of the fixing rollers 20 and 22. Insert and fix). Accordingly, the fixed rollers 20 and 22 and the cylinder block 10 are fixed to the welding ready position, that is, the cylinder block 10 is maintained in the normal state, as shown in FIG. 1. do.

In this preparation state, after the operator pulls the fixing pin 38 out of the reference hole 32 and operates the control device 92, the driving motor 26 and the reduction gear 28 of the driving device 24 are operated. Each fixed roller 20, 22 is rotated. Such rotation of the fixed rollers 20 and 22 is stopped after continuing until the first fixing hole 32a of the first fixed roller 20 reaches a position opposite to the fixing device 34, for example. Of course, such a precise rotation of the first fixed roller 20 is detected by the positioning sensor 40 is controlled by the central controller. Accordingly, the cylinder block 10 is set to the first welding position where the cylinder head seating portion and one cylinder liner upper assembly portion 10a can be welded as shown in FIG. In this state, the worker inserts the fixing pin 38 of the fixing device 34 into the first fixing hole 32a to fix the cylinder block 10.

Then, when the operator operates the central control device 92, the welding nozzle 64 of the welding mechanism 60 welds one cylinder liner upper assembly portion 10a as shown in FIG. When the welding of one cylinder liner upper assembly is completed, the welding mechanism 60 returns to the initial position and the operation is temporarily stopped.

In this state, after the operator pulls the fixing pin 38 out of one first fixing hole 32a, the control device 92 is operated to drive the drive motor 26 and the reducer 28 of the drive device 24. It is operated to rotate the respective fixed rollers (20, 22). The rotation of the fixed rollers 20 and 22 is stopped after continuing until the second fixing hole 32b of the first fixed roller 20 reaches a position opposite to the fixing device 34, for example. The accurate rotation of the first fixed roller 20 is, of course, detected by the positioning sensor 40 is controlled by the central processing unit. Accordingly, the cylinder block 10 is in the second welding position where a portion of the other cylinder liner lower assembly portion 10b and the main bearing assembly portion 10c can be welded as shown in FIGS. 4 and 5. Is set. In this state, the operator inserts the fixing pin 38 of the fixing device 34 into the second fixing hole 32b to fix the cylinder block 10.

Then, when the operator operates the central control unit 92, the welding nozzle 64 of the welding mechanism 60 welds the other cylinder liner lower assembly 10b as shown in FIG. When welding of the lower assembly is completed, the welding mechanism 60 welds a part of the main bearing assembly 10c as shown in FIG. 5. As such, when welding of the other cylinder liner lower assembly portion 10b and the main bearing assembly portion 10c is completed, the welding mechanism 60 returns to the initial position and the operation is temporarily stopped.

In this state, the operator pulls the fixing pin 38 out of the second fixing hole 32b again, and then operates the control device 92 to operate the driving motor 26 and the reduction gear 28 to operate the respective fixing rollers ( 20, 22 are rotated. Such rotation of the fixed rollers 20, 22 is also sensed by the positioning sensor 40 and controlled by the central processing unit. Accordingly, as shown in FIGS. 6 and 7, the cylinder block 10 has a third welding position at which the lower assembly portion 10d and the other part of the main bearing assembly portion 10c of one cylinder liner can be welded. Is set to. In this state, the operator inserts the fixing pin 38 of the fixing device 34 into the third fixing hole 32c to fix the cylinder block 10.

Then, when the operator operates the central control device 92, the welding nozzle 64 of the welding mechanism 60 welds one cylinder liner lower assembly portion 10d as shown in FIG. When welding of the lower assembly is completed, the welding mechanism 60 welds the remaining part of the main bearing assembly 10c as shown in FIG. 7. As such, when welding of one cylinder liner lower assembly portion and the remaining portion of the main bearing assembly portion is completed, the welding mechanism 60 returns to the initial position and the operation is temporarily stopped.

In this state, the operator finally pulls the fixing pin 38 out of the third fixing hole 32c and then operates the control device 92 to drive the drive motor 26 and the reducer 28 of the drive device 24. Is operated so that each of the fixed rollers 20 and 22 is rotated. Such rotation of the fixed rollers 20 and 22 is stopped after continuing until the fourth fixing hole 32d of the first fixed roller 20 reaches the position opposite to the fixing device 34, for example. Of course, such a precise rotation of the first fixed roller 20 is detected by the positioning sensor 40 is controlled by the central processing unit. Accordingly, the cylinder block 10 is set to the fourth welding position where the cylinder head seating portion and the other cylinder liner upper assembly portion 10e can be welded as shown in FIG. In this state, the operator inserts the fixing pin 38 of the fixing device 34 into the fourth fixing hole 32d to fix the cylinder block 10.

After the operator operates the central control unit 92, the welding nozzle 64 of the welding mechanism 60 welds the other cylinder head seating portion and the cylinder liner upper assembly 10e as shown in FIG. do. As such, when welding of the other cylinder liner upper assembly portion 10e is completed, the welding mechanism 60 returns to the initial position and the operation is temporarily stopped.

In this way, when welding of the cylinders of one row of cylinders and the main bearing assembly of the cylinder block 10 and the corresponding portions of the main bearings is completed, the operator returns the cylinder block 10 to the ready position again. That is, the operator removes the fixing pin 38 from the fourth fixing hole 32d, rotates the cylinder block 10 to the ready position as described above, and then inserts the fixing pin 38 into the reference hole 32. Fix it and set it in the ready position.

In this state, the welding mechanism 60 is moved by the operator or the central control unit 92 to a position for welding the cylinder and the main bearing assembly in the subsequent row. That is, the welding mechanism 60 is moved to a predetermined position, that is, a position for welding the cylinders and the main bearing assembly of the second row by moving the support member 52 of the transfer device 46 along the guide rail 50. . Such movement of the supporting member 52 is of course performed by the conveyor 54. Here, the movement of the welding mechanism 60 is detected by the plurality of limit switches 58 and precisely controlled by the central controller 92.

In this state, the worker starts to pull the fixing pin 38 out of the reference hole 32 and welds the other cylinder and main bearing assembly row formed in the cylinder block 10 in the manner described above. do.

Of course, by repeatedly performing the above-described process can be welded to each cylinder liner upper assembly and cylinder liner lower assembly and all the main bearing assembly formed on the cylinder block 10 as a whole.

In particular, when the foreign matter is generated in the nozzle 64 of the welding mechanism 60 by the continuous welding operation as described above, in particular, when the spatter is formed, the operator or the central controller 92 is the welding nozzle control device 76 Using the brush 78 formed in Fig. 1), the spatter of the nozzle 64 can be removed or the nozzle can be cleaned. Of course, the nozzle 64 may be automatically cleaned before or after the welding operation. In addition, in order to minimize or prevent the formation of the spatter on the nozzle 64, the spatter prevention liquid may be applied using the spatter prevention liquid applicator 80 before and after the welding operation.

In addition, when the wire W is exposed longer than necessary by the nozzle of the welding mechanism 60, the length of the wire W can be appropriately cut | disconnected using the cutter 82. FIG. This can stabilize the generation of arcs and consequently increase the working rate.

In particular, in the case of continuous repetitive welding operation or long time use of the welding apparatus, when the origin of the nozzle 64 is changed or is expected to be changed due to the operation error of the welding apparatus and other peripheral devices, the welding nozzle origin inspector 84 is used. The exact origin of the nozzle 64 can be set or corrected.

On the other hand, the position or three-dimensional movement of the welding gun or the welding nozzle 64 of the welding mechanism 60 during the additional process performed by the accessory, such as cleaning the nozzle, inspection of the nozzle, cutting of the wire as described above Is sensed by each sensor 88, 90 installed in the welding nozzle control device 76 and transmitted to the central control unit 92, so that the process can be executed accurately.

Accordingly, it is possible to prevent the spatter generated in the welding nozzle as well as to prevent the failure of the arc.

As a result, according to the automatic welding device for regenerating the cylinder block according to the present invention, the welding nozzle can be easily cleaned, the nozzle spatter can be prevented, the welding rod can be cut to an appropriate length, and the welding position can be accurately Since it can be corrected, there is an advantage that the productivity of the cylinder block to be reproduced is improved.

Claims (3)

delete A support device for rotatably supporting the cylinder block, a driving device installed in the support device, the cylinder head seating portion and the cylinder liner upper assembly of the cylinder block, the cylinder liner lower assembly And a welding mechanism for welding the main bearing assembly, a transfer apparatus for moving the welding mechanism along the longitudinal direction of the cylinder block to a welding execution position, and a control unit for controlling the driving apparatus, the welding mechanism, and the transfer apparatus. In the automatic welding device for cylinder block regeneration comprising a central control unit and a welding nozzle adjusting device for cleaning and adjusting the welding nozzle of the welding mechanism, The welding nozzle adjusting device includes a brush for removing a spatter that may be formed in the welding nozzle of the welding gun, and a spatter in the welding nozzle to prevent the spatter from being formed in the welding nozzle. An automatic welding device for regenerating a cylinder block, comprising: a spatter-proof liquid applicator for applying a protective fluid. The apparatus of claim 2, wherein the welding nozzle adjusting device further comprises a cutter for adjusting the wire, an origin checker for catching the origin of the welding nozzle, and a plurality of proximity sensors for detecting the position and movement of the welding nozzle. Automatic welding device for regenerating the cylinder block comprising a.