KR960013673B1 - Inspecting apparatus for spot-welding - Google Patents

Abstract

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Description

Spot welding checker

1 is a vertical cut front view showing an embodiment of the present invention in a state in which the valve hammer is retracted.

2 is a vertical cutaway side view of FIG.

3 is a vertical cut front view corresponding to FIG. 1 showing a state where the valve hammer is advanced.

4 is a vertical cutaway front view corresponding to FIG. 1 showing the state before the knife gauge is moved by stopping the valve hammer.

FIG. 5 is a vertical cutaway front view corresponding to FIG. 1 showing a state where the knife gauge is moved. FIG.

6 is a view seen from the D-D line which is the main part of FIG.

FIG. 7 is a view from the E-E line which is the main part of FIG.

8 is an enlarged view of the knife gauge portion of FIG.

9 is a view corresponding to FIG. 8 showing a modification.

FIG. 10 is a view corresponding to FIG. 8 showing another modification. FIG.

FIG. 11 is a view from the F-F which is the main part of FIG.

FIG. 12 is a view from the G-G line of the main part of FIG. 5. FIG.

* Explanation of symbols for main parts of the drawings

3: front 4: rear

5: case 6: welded portion

7, 8: metal plate 10: front cover

11: Front part 12: Back of cylindrical shape

13: entrance 14: long groove

15: middle step portion 16: tapered surface

17: pin driver 18: coil spring

19: pin 20: knife gauge

21: boss portion 22: knife portion

23: hole 24: guide pin

25, 25a, 25b: rear side of boss 26: coil spring

27: annular incision 29: opposing surface of knife gauge

30: cylinder 31: air inlet

32: air passage 33: ring stopper part

34: bulkhead 35: sliding hole

36: long hole 37: scale

40: valve case 41: annular projection

42: air passage 43, 44: pin insertion hole

50: hammer hammer 51: the front part

52 land portion 53 abutting plate

54: coil spring 55: compression flow path

56, 56a, 56b: front side 60: plunger

61: front part 62: jaw part

63: hollow hole 64: coil spring

65: indicator 66: oil

70: piston 71: rod part

72: piston 80: rear cover

81: air supply port for valve case 82: air supply port for piston

90: rotary valve 91: air hose connection port

92: central axis 93: packing

M-M: Centerline X: Spacing

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a spoke welding inspector for measuring a welded part diameter of two metal sheets spot welded to inspect a weld state.

Conventionally, as a means of inspecting the welding state of a welded portion, inspection means that a steel chisel is inserted into a gap between two spot metal plates welded by spot welding and that the welded portion does not fall, has been performed. have.

In addition, a method of directly inspecting the welded portion by destroying the welded workpiece has been performed, but this requires a waste treatment of a product selected as an inspection product.

Since the conventional inspection means has such problems as described above, the present invention is to provide a spot welding inspection machine which is easy to handle even by an inexperienced person and has high precision in a short time or can be inspected without treating the inspected object as waste.

This invention makes it possible to test | inspect without spot-welding the welding part of two metal plates.

The spot welding inspection machine which concerns on this invention is a knife gauge which has a taper surface facing each other formed in the front cover of the case which consists of a cylinder and a front cover, the knife part which moves along this taper surface, and changes mutually space | interval, and a knife gauge A valve hammer continuously impacting the rear end face of the valve, a valve case disposed inside the case to selectively supply air to the valve hammer, and the valve hammer forward when the air is not supplied to the valve case. It is equipped with a pushing piston.

In detail, the front cover which integrally combines the cylindrical rear part integrally in the axial direction is formed in the front part of the tapered conical taper toward the front end, and the front surface is inclined in accordance with the inclination of the inner part of the front cover. A knife gauge consisting of a boss portion and a pair of knife portions having straight surfaces facing each other, the boss portion is inserted into the guide pin via the coil spring and symmetrically side by side, protruding the knife portion from the inlet of the front cover and at the same time as the cone portion. Insert the front of the boss to the inner surface of the slide to enable the sliding movement.

In addition, an annular projection is formed in the front portion of the cylinder in which the fitting length at the time of fitting coaxially from the rear in the front cover is adjusted toward the inner surface, and between the rear end surface and the rear inner surface of the annular projection. Install the valve case with the air flow path through the air inlet opening to the side of the cylinder.

And a front portion slidingly contacting the annular projection of the valve case and a land portion slidingly contacting the rear inner surface of the annular projection of the valve case, and an air flow path between the front head side and the rear end surface. The formed valve hammer is slidably inserted into the valve case through the coil spring between the contact plates which abuts on the rear surface of the knife gauge.

In addition, the front cylinder portion of the plunger, which is composed of a front cylinder portion for pressing the valve hammer and a jaw portion in sliding contact with the inner surface of the cylinder, can be fitted to the rear of the valve case, and the rear end surface of the valve case and the plunger can be fitted. The return coil spring is inserted between the front of the tab and the jaw of the plunger is inserted into the cylinder to allow the sliding motion.

In addition, a piston that presses the plunger to the rear of the cylinder and the rear of the plunger is fitted, and the rear end surface of the cylinder is provided with an air flow path formed along the cylinder through an air inlet on the side of the cylinder and the rear end surface of the piston. Each air supply port to be supplied is covered with a rear cover formed, and the rear cover of the rear cover is made to contact the rotary valve for switching air.

With the grip and knife gauge fitted to the front cover, the rear side of the boss is inclined to form a V-groove-shaped recess toward the rear, and the front of the abutment plate is tilted forward at a great inclination angle to the rear slope of the boss. It is inclined in the shape of a roof to form a convex surface.

In addition, an index was provided on the side face of the plunger jaw, a long hole in the bus bar direction was drilled in the cylinder, and the index was assembled into the long hole.

(Example)

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

Reference numeral 3 is the front of the spot weld inspector and 4 is the rear. The front cover 10 is comprised of the front part 11 and the cylindrical back part 12 of the conical surface shape inclined toward the front. In addition, a horizontal inlet 13 is formed at the end of the front surface portion 11 of the front cover 10, and a groove 14 is formed at the rear end of the cylindrical portion 12. Intermediately down to the bottom and the intermediate step portion 15 is formed at the end thereof.

The short side of the long groove 14 is a tapered surface 16 in which the front portion is tapered forward, and the rear portion is parallel to the center line MM, and the inlet 13 and the long groove 14 have a knife. The gauge 20 is mounted. The knife gauge 20 has a knife portion 22 penetrating the longitudinally long inlet 13 and a boss portion 21 fitted into the elongated groove 14, and guide pins 24 through the coil spring 26. When the knife gauge 20 is symmetrically fitted on both sides of the ring, an annular cutout 27 into which the end of the coil spring 26 is fitted is formed inside the boss 21 of the knife gauge 20. The boss portion 21 is fitted to the tapered surface 16 on the inner surface of the front portion 11 of the conical surface in a state where the knife gauge 20 fitted to the guide pin 24 is inserted into the front cover 10. The knife part 22 fitted to the front end of the part 21 has a surface 29 facing each other to form a straight state, the front surface of the boss 21 is movable in an inclined direction along the tapered part 16. Inclined to The rear end of the knife gauge 20 protrudes rearward from the middle end tick portion 15.

The cylinder 30 is tilted coaxially at the rear of the front cover 10 and is adapted to adjust the fitting length with respect to the front cover 10 by means described later.

The valve case 40 is provided in the front part of the cylinder 30, and the annular projection part 41 is formed in the front part of the inner surface of the valve case 40, and is annular in the back end surface of the valve case 40. An air flow passage 42 is formed between the inner surface of the protrusion 41. In addition, the air flow passage 42 is connected to the air inlet 31 formed in front of the cylinder (30).

Since the valve hammer 50 pushes the rear end surface of the knife gauge 20 away from the contact plate 53, the coil spring 54 is mounted between the contact plate 53 and the valve case 40. It is fitted to be able to slide inside. The valve hammer 50 has an air flow path 55 formed between the rear end surface of the land portion 52 sliding in the rear inner surface of the annular projection 41 of the valve case 40, and the front head. The coil spring 54 fitted to the outside of the part 51 is provided between the annular projection part 41 and the contact plate 53.

The plunger 60 is a hollow plunger which presses the valve hammer 50 and has an opening in the rear end surface. The plunger 60 is composed of a front barrel portion 61 and a jaw portion 62, and the front cylinder portion 61 is a valve case 40. The coil spring 64 is installed between the rear end edge of the valve case 40 and the front surface of the jaw portion 62 so that the jaw portion 62 can slide in the cylinder 30. It is fitted as much as possible. An annular stopper 33 is provided at the rear of the air inlet 31 of the cylinder 30 to prevent the plunger 60 from moving forward.

The piston 70 is slideably inserted into the cylinder 30 at the rear of the plunger 60 and slides into the sliding hole 35 formed in the partition 34 in the cylinder 30. And a rod portion 71 pressed into the hollow hole 63 of the plunger 60 and a piston portion 72 in sliding contact with the cylinder 30. In addition, the oil 66 is filled in the hollow hole 63 of the plunger 60.

The rear cover 80 is covered with the rear end surface of the cylinder 30, and the air flow path 32 formed along the cylinder 30 which leads to the air inlet 31 of the cylinder 30 side surface, and the piston 70 The air supply port 81 for the valve case and the air supply port 82 for the piston are provided.

On the other hand, the rotary valve 90 for air switching is attached to the rear face of the rear cover 80 by a packing shaft 93 by a central shaft 92. By switching the rotary valve 90, An air hose connecting port 91 through which the air supply ports 81 and 82 can be connected arbitrarily is formed.

The pin driver 17 is inserted into any one of the plurality of pin insertion holes 43 and 44 formed in the valve case 40 in the front part of the cylinder 30 at the rear outer surface of the front cover 10. The fitting length of the cylinder 30 to the front cover 10 can be adjusted by fitting (19) out of the coil spring 18 and inserting it into the other pin insertion holes 44 and 43.

Next, the operation will be described. First, the pin 19 is removed and the front cover 10 is inserted into the cylinder 30 in a shallow state, and the pin 19 is inserted into the front pin insertion hole 43 as shown in FIG. (10) and the cylinder (30) is fixed.

As shown in FIG. 1 and FIG. 2, after inserting the knife part 22 by the space | interval of the welding part 6 of the two metal plates 7 and 8 spot-welded, the rotary valve for air switching An air hose connected to a compressed air source (not shown) is connected to the air hose connecting hole 91 of 90, and the air supply port 81 for valve case is set in a state capable of supplying air. Likewise, the air flow path 32 of the cylinder 30 and the air inlet 31 are sent to the state in which the valve case 40 is retracted and the air flow path 42 of the valve case 40 passes. When the compressed air is supplied to the air inlet path 55 of the valve hammer 50, the compressed air enters between the rear end surface of the valve hammer 50 and the front end surface of the plunger 60, thereby providing pressure to the valve hammer 50. A car is generated and pressed in the front to impact the contact plate 53.

When the valve hammer 50 moves forward, as shown in FIG. 2, the air flow path 55 formed in the front portion 51 of the valve hammer 50 is an annular protrusion 41 of the valve case 40. By moving forward) over the air, the air in the air passage 55 is discharged out through between the knife gauge 20 and the valve hammer 50. When the air flow passage 55 is decompressed due to the air discharge, the valve hammer 50 is moved backward by the coil spring 54 to return to the initial state.

As described above, the valve hammer 50 reciprocates (slides) in the axial direction, and continuously pushes the knife gauge 20 through the abutting plate 53, so that the knife gauge 20 vibrates and the metal plate. It penetrates deep into (7) and (8), and it presses easily to the welding part 6 easily.

When the knife gauge 20 advances to the position where the welding part 6 is inserted, as shown in FIG. 4, the pin 19 is removed and the front cover 10 is inserted deeply into the cylinder 30 to insert the valve hammer 50. The pin 19 is inserted into the rear pin insertion hole 44, as shown in Figs. 4 and 5, in this state. And the cylinder 30 to be fixed.

When the rotary valve 90 for air switching is replaced with the air supply port 82, and as shown in FIG. 4, X is supplied to the rear end surface of the piston 70, the piston 70 is pressed forward. Move. The piston 70 moves and enters the inside of the pinhole 63 to press the plunger 60 forward. The plunger 60 pressed forward pushes the knife gauge 20 forward through the valve hammer 50 and the contact plate 53. The knife gauge 20 pressed forward moves forward along the tapered surface 16 of the front surface portion 11 of the front cover 10 and simultaneously approaches the knife portion 22 while resisting the coil spring 26. The gap between the two ends can be narrowed, and finally, the direct connection of the welded part 6 can be measured and inspected by making it contact with the welded part 6 reliably.

After the inspection is completed, the pin 19 is pulled out again, the cylinder 30 is inserted into the front cover 10 as shown in FIGS. 1 and 2 thinly, and the pin 19 is moved forward. The front cover 10 and the cylinder 30 to be inserted into the pin insertion hole 43.

Then, by operating the rotary valve 90 for air switching to supply air to the air supply port 81 to send air to the air flow path 32, the air inlet 31 of the cylinder 30 plunger 60 The cylinder 30 is tensioned while supplying compressed air to the air flow passage 55 of the valve hammer 50 via the air flow passage 42 of the valve case 40 while keeping the rate of retreating. As in the case of pressing, the knife gauge 20 vibrates and the knife gauge 20 can be easily taken out. At this time, the plunger 60 returns to the initial state by the coil spring 64 for the return.

As shown in FIG. 9, the front surface 56a of the contact surface 53 of the back surface 25a of the boss | hub part 21 which comprises the knife gauge 20 is a parallel plane. 10, the rear surface 25b of the boss portion 21 is inclined to form a V-shaped groove in a state of being fitted to the front cover 10, and the contact plate 53 and the front surface 56b are the bosses. It inclines so that a recess may be formed toward the front at an inclination angle that corresponds to the inclination of the rear surface 25b of the portion 21. In this way, when the valve hammer 50 and the contact plate 53 are pushed forward by the plunger 60 pressed forward, the contact plate 53 is inclined to form the V-shaped groove of the boss portion 21. Because of the pressing, moments are generated in the direction in which the tip of the knife gauge 20 approaches each other, so that the front surface of the boss portion 21 slides along the inclined inner surface of the front surface portion 11 of the front cover 10. At the same time, while sliding toward each other along the guide pin 24 toward the axial center of the front cover 10, each of them is reduced to abut the weld, so that the weld is securely fitted. For this reason, the diameter of a weld part can be measured and inspected more easily and correctly.

As shown in FIG. 8, the inclination angle formed in the rear surface 25 of the boss portion 21 of the knife gauge 20 is slightly larger than the inclination angle of the front surface 56 of the contact plate 53. This makes the moment larger.

An indicator 65 is provided on the side surface of the jaw portion 62 of the plunger 60, and the long hole 36 in the bus bar direction is drilled at a position corresponding to the indicator 65 of the cylinder 30. The indicator 65 is fitted to be movable. The state in which the knife gauge 20 shown in FIGS. 1 to 3 is inserted between the metal plates 7 and 8 is shown in FIG. 11, and the piston 70 advances to the fourth and 12th stages. In this case, the indicator 65 moves relative to the scale 37 of the cylinder 30. The knife gauge 20 moves along the tapered face 16. When Y is used as the movement amount of the indicator 65 and Z is set as an arbitrary constant, a proportional relationship is established between Z-Y and the interval between the two knife portions 22.

In other words, when the proportional constant is K,

Z-Y = KX

That is, Y = Z-K · X

The value of X can be measured by reading the value of Y.

According to the present invention, a knife gauge having a larger gap than a weld is continuously inserted between two welded metal plates while being impacted and pressed to the position where the weld is inserted. The welding accuracy can be measured by

Therefore, the conventional definition, chisel, and the like to push the test requires a considerable amount of time and handling, but according to the present invention, even an inexperienced person can easily handle it, and in a short time, it is possible to inspect the species with high precision. have.

Claims (6)

A tapered surface 16 facing each other formed in the front cover 10 of the case 5 consisting of the cylinder 30 and the front cover 10, and moved along the tapered surface to change the mutual spacing x. A knife gauge 20 having a knife portion 22, a valve hammer 50 continuously stratifying the rear end surface of the knife gauge, and disposed inside the case to selectively supply air applied to the valve hammer. A spot welding inspector having a valve case (40) and a piston (70) for pushing the valve hammer (50) forward when air is not supplied to the valve case (40). A front cover (10) integrally combining a cylindrical rear portion (12) in the axial direction is formed on the front portion (11) tapered in a tapered shape toward the front end, and the front surface (10) and the front portion (11) The guide pin 24 is provided through the coil spring 26 with a knife gauge 20 including a boss portion 21 inclining the front surface in accordance with the inclination of the front surface and a pair of knife portions 22 having straight surfaces facing each other. The boss portion 21 is inserted into the symmetrical side, so that the knife portion 22 protrudes from the inlet 13 of the front cover 10, and at the same time the boss portion 21 is formed on the inner surface of the front portion 11 of the conical surface. An annular projection 41 is provided toward the front of the inner surface of the cylinder 30 in which the fitting length at the time of fitting the front surface so as to be slidable and being fitted coaxially from the rear in the front cover 10 is adjusted. Formed, and the rear end surface and the rear of the annular projection (41) The valve case 40 which formed the air flow path 42 which connects to the air inlet 31 opened to the side surface of the cylinder 30 between the surface and it is inserted and installed, and the ring-shaped protrusion part of the said valve case 40 is installed. It consists of the front head 51 which is in sliding contact with the 41 and the land part 52 which is in sliding contact with the rear inner surface of the annular projection 41 of the valve case 40, and the front head 51 side. The valve hammer 50 between the abutment plate 53 which abuts the valve hammer 50 on which the air flow path 55 is formed between the back end surface and the rear end surface of the knife gauge 20, via the coil spring 53. The front cylinder portion 61 of the plunger 60, which is slidably fitted into the shell) and is composed of a front cylinder portion 61 for pressing the valve hammer 50 and a jaw portion 62 for sliding contact with the inner surface of the cylinder 30. The rear end of the valve case 40 is fitted with a sliding motion to the rear of the valve case 40, and the rear end surface and the plunge of the valve case 40 are The jaw portion 62 of the plunger 60 is inserted into the cylinder 30 so as to be slidable by inserting the return coil spring 64 between the front surface of the jaw portion 62 of the cylinder 60. Insert the piston 70 which presses the plunger 60 to the rear of the rear of the plunger 60 and the rear end surface of the cylinder 30 through the air inlet 31 on the side of the cylinder 30. Covered with a rear cover 80 formed with respective air supply ports 81 and 82 for supplying air to the air flow passage 32 and the rear end surface of the piston 70 formed along the 30, and the rear cover. Spot welding inspection device which is made to make the air valve for switching the air to the rear of the (80). 2. The back surface of the boss portion 21 is inclined so as to form a V-groove-shaped recess toward the rear side while the knife gauge 20 is fitted to the front cover 10, and at the same time, the contact plate ( 53. A spot welding inspector which inclines the front surface of the roof 53 to form a convex surface facing forward at an inclination angle corresponding to the rear slope of the boss portion 21. The indicator 65 is provided on the side surface of the jaw portion 62 of the plunger 60, and the cylinder 30 has a long hole 36 in the bus bar direction. Spot welding checker made by assembling). The back surface of the boss portion 21 is inclined so as to form a V-groove-shaped recess toward the rear side while the knife gauge 20 is inserted into the front cover 10, and at the same time, the contact plate ( 53. The spot welding inspector which inclines this front side to a roof shape so that a convex surface may be formed to face forward at an inclination angle corresponding to the rear side of the boss part 21. The indicator 65 is provided on the side surface of the jaw portion 62 of the plunger 60, and a long hole 36 in the bus bar direction is drilled in the cylinder 30, and the indicator 65 is formed by the long hole 36. Spot welding checker made by assembling)