KR20090107134A - Spot-riveting device for jointing different kind material - Google Patents

Abstract

PURPOSE: A spot-riveting device for jointing material two types of materials is provided to increase line composition freedom degree and to improve process efficiency. CONSTITUTION: A spot-riveting device for jointing material two types of materials comprises a frame(10), an upper gun(14a), a lower gun(14b), upper and lower part rivet-steel plate supply tubes(16), a rivet-steel plate receiving member, an access servo motor, pressing servo motors(48a,48b) and upper and lower part welding electrode/shanks(52a,52b). The frame has a slide groove(12) on top. The upper gun is combined with the slide groove. The lower gun is combined with the lower part of the frame. The upper and lower part rivet-steel plate supply tubes are connected to the upper gun and lower gun. The rivet-steel plate receiving member is connected to top of the lower gun and to bottom of the upper gun. The access servo motor and the pressing servo motor are mounted on top and bottom of the frame.

Description

Spot riveting device for joining dissimilar materials {Spot-riveting device for jointing different kind material}

The present invention relates to a spot riveting device for joining dissimilar materials, and more particularly, by allowing the rivet-steel sheet to be strongly joined using spot resistance welding, joining between lightweight metals and dissimilar materials can be performed more easily. The present invention relates to a spot riveting device for joining dissimilar materials capable of improving the joining quality thereof.

Recently, as the demand for fuel economy improvement and environmental pollution reduction is increasing, the application of lightweight metals such as aluminum and magnesium to the vehicle body is increasing.

As shown in FIG. 9, in the case of lightweight metals and dissimilar materials, electrical and thermal conductivity is high, and welding electrode contamination is severe, and thus, the conventional spot welding (resistance welding) method or laser welding method is difficult to join them. Therefore, mechanical joining methods such as self-piercing riveting or clinching are used, but these mechanical joining methods have a high production cost and are somewhat inferior in joining quality compared to high level welding joints.

If the body is used in combination with steel and light metal, there is no proper joining method except mechanical joining, and the production line has to be configured separately due to the dissimilar material joining part that is limited to a part of the total body area. There is a problem in terms of efficiency.

The present invention has been made in view of the above, the spot welding and the spot- riveting method is combined with one, if the rivet-steel plate is supplied through a feeding system capable of supplying a disk-shaped rivet-steel plate spot- riveting When the rivet-steel sheet is not used, spot welding can be performed, and thus, steel sheets, lightweight metals, and dissimilar metals are joined in the form of a mixture of mechanical joints and alloy joints to obtain excellent joint quality. It is an object of the present invention to provide a spot riveting device for joining dissimilar materials.

The present invention for achieving the above object is a frame with a slide groove formed on the upper end; An upper gun coupled to the upper and lower slide grooves of the frame to be lowered and a lower gun coupled to a lower portion of the frame; Upper and lower rivet-steel supply pipes connected to the upper and lower guns; Rivet-steel plate receiving means fastened to the lower end of the upper gun and the upper end of the lower gun, respectively, to receive a rivet-steel plate from the upper and lower rivet-steel supply pipes; Upper and lower access servomotors respectively mounted to upper and lower ends of the frame to drive the upper and lower guns in a lowering direction; Upper and lower pressurizing servomotors mounted on the upper and lower guns so as to be lowered and lowered respectively; Upper and lower welding electrodes / shanks mounted on the upper and lower pressurizing servomotors to be able to move up and down to bond the rivet-steel plate to a metal object to be bonded or spot weld the metal object to be bonded; It provides a spot riveting device for bonding dissimilar materials, characterized in that configured to include.

In a preferred embodiment, the upper and lower guns include: a main arm which is coupled to the slide groove of the frame to be elevated; First and second branching arms bifurcated at the ends of the main arm; A cylindrical rivet steel plate reservoir provided in the second branch arm and connected to the rivet steel plate supply pipe; A support plate bent outwardly from the end of the first branch arm; Characterized in that consisting of.

In particular, a first hole penetrates left and right in the base plate bent portion of the first branch arm, and a second hole coinciding with the first hole penetrates the bottom inner portion of the rivet-steel plate reservoir of the second branch arm. It is characterized by.

In addition, an air cylinder connected to an air supply means is mounted on a bottom outer portion of the rivet-steel reservoir of the second branch arm, and a fixing pin press-transmitted to the inside of the rivet-steel reservoir is installed inside the air cylinder. It is characterized by.

In another preferred embodiment, the rivet-steel plate receiving means comprises: a feed plate which is seated on the support plate of the first branch arm and is transported from side to side through the first hole and the second hole of the rivet-steel plate reservoir; A seating hole formed through one side of the supply plate so that the rivet-steel plate in the rivet-steel plate storage container is seated; A riveting servo motor mounted on the other side of the supply plate to transfer the supply plate left and right; Characterized in that consisting of.

On the other hand, the body of the upper and lower pressurizing servomotor is mounted to the rail groove formed at the point where the first and second branch arm split from the main arm to be able to lift and lower, from the body of the upper and lower pressurizing servomotor The upper and lower welding electrodes / shanks respectively protruding toward the metal object to be bonded are disposed between the first and second branch arms.

Through the above problem solving means, the present invention provides the following effects.

1) It can overcome the limitations of mechanical bonding.

That is, a pair of rivet-steel plates are sandwiched between the panels to be joined to form a mechanical joint, and the rivet-steel plates are welded to each other to form an alloy layer between the rivet-steel plates and the panel to be joined, so that a conventional mechanical joint is formed. It can provide much better joining and welding quality.

2) Very easy to join lightweight metal.

That is, the bonding is possible regardless of the material of the base material to be bonded, the method is simple and there is no separate bonding restrictions, it provides a very easy advantage in the light metal bonding.

3) Freedom of line configuration and process efficiency can be improved.

In other words, when the apparatus of the present invention does not load the rivet-steel plate, the same welding as the existing spot resistance welding machine is possible, and thus, even in a process in which light metal joining and steel joining are mixed in the vehicle body, the present invention can be used only with the apparatus of the present invention. have.

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

1 is a perspective view illustrating a spot riveting device for joining dissimilar materials according to the present invention, and FIGS. 2 and 3 show front and side views thereof, respectively.

As shown in FIGS. 1 to 3, the frame 10 serves as a main skeleton, and slide grooves are formed at upper and lower ends of the frame 10, respectively.

The frame 10 may be mounted to a robot installed in a line so as to be transported in a desired direction.

At this time, the upper gun 14a is coupled to the upper slide groove 12 of the frame 10 so as to be lowered and lowered, the lower gun 14b is coupled to the lower portion of the frame, the upper gun 14a and the lower gun ( The rivet-steel plate supply pipe 16 is connected to the predetermined position of 14b).

Here, the configuration of the upper gun and lower gun in more detail as follows.

The upper gun 14a and the lower gun 14b have a vertically symmetrical structure and have the same configuration.

That is, the main arm 18 coupled to the slide groove 12 of the frame 10 to be lowered, the first branch arm 20 and the second branch branched bifurcated from the main arm 18. The base arm 22 forms a frame, and a cylindrical rivet-steel reservoir 24 connected to the rivet-steel supply tube 16 is vertically fixed in the second branch arm 22.

At this time, the supporting plate 26 which is bent outward is integrally formed at the end of the first branch arm 20.

In particular, a first hole 28 penetrates left and right in the bent portion of the support plate 26 of the first branch arm 20, and at the bottom of the rivet-steel plate reservoir 24 of the second branch arm 22. A second hole 30 facing the first hole 28 is formed through the inner portion thereof.

In addition, an outer portion of the bottom of the rivet-steel storage container 24 of the second branch arm 22 is equipped with an air cylinder 32 connected to an air supply means (not shown), and the air cylinder 32 ) Has a fixing pin 34 that is pressurized to the inside of the rivet-steel plate reservoir 24 by air pressure.

At this time, the access servo motor 36 is mounted on the upper end of the frame 10 so that the main arm 18 of the upper gun 14a moves up and down along the slide groove 12 of the frame 10. .

On the other hand, the rivet-steel plate receiving means is mounted to the lower end of the upper gun 14a and the upper end of the lower gun 14b, respectively, so that the rivet-steel plate receiving means may be the upper and lower rivet-steel plate supply pipes. Through (16) serves to receive the rivet-steel plate 28 stored in the rivet-steel plate storage container 24 in individual units.

Here, looking at the configuration of the rivet-steel plate receiving means in more detail as follows.

4 is an enlarged view illustrating main parts of the rivet-steel plate receiving means of the spot riveting device for joining dissimilar materials according to the present invention, and FIG. 5 is a perspective view showing the structure of the supply plate in the configuration of the rivet-steel plate receiving means.

First, the supply plate 40 is seated on the support plate 26 of the first branch arm 20 so as to be able to transfer left and right.

That is, the supply plate 40 is formed by the first hole 28 formed in the bent portion of the support plate 26 of the first branch arm 20 and the second hole 30 of the rivet-steel plate reservoir 24. It is seated in a state that can be transported from side to side while passing.

In this case, a seating hole 42 is formed in one side of the supply plate 40 so that the lowermost of the plurality of rivet-steel plates 38 stored in the rivet-steel plate storage container 24 is seated therethrough. Since the step catching portion 44 is formed on the inner diameter surface of the 42, the rivet-steel plate 38 may be easily caught while being caught.

In particular, the other side of the supply plate 40 is equipped with a riveting servo motor 46, the riveting servo motor 46 serves to transfer the supply plate 40 to the left and right. .

On the other hand, the upper and lower pressurizing servomotors 48a and 48b are mounted on the upper gun 14a and the lower gun 14b so as to be able to lift and lower, respectively, and to the upper and lower pressurizing servomotors 48a and 48b. The upper and lower welding electrodes / shanks 52a and 52b for bonding the rivet-steel plate 38 to the metal object 50 to be bonded or spot welding the metal object 50 to be bonded are integrally mounted.

In more detail, the body of the upper and lower pressurizing servomotors 48a and 48b is a rail groove 54 formed at a branching point from the main arm 18 to the first and second branch arms 20 and 22. The upper and lower welding electrodes / shanks 52a and 52b mounted on the upper and lower pressurized servo motors 48a and 48b and protruding toward the metal object 50 to be joined, respectively, are mounted on the upper and lower pressurized servomotors 48a and 48b. And second branch arms 20 and 22.

Here, the operational state of the spot riveting device for joining dissimilar materials of the present invention having the above configuration will be described.

6 is a cross-sectional view illustrating an operational flow of a spot riveting device for joining dissimilar materials according to the present invention.

Figure 6 (a) shows the initial state of the rivet-steel sheet.

That is, the bottom of the plurality of rivet-steel plates stored in the rivet-steel reservoir 24 is inserted into the seating hole 42 of the supply plate 40, and also the right side of the supply plate 40 The fixing pin 34 in the air cylinder 32 is in close contact with each other, and the upper and lower welding electrodes / shanks 52a and 52b are positioned on the upper and lower surfaces of the supply plate 40.

Figure 6 (b) shows the rivet-steel plate loading and the movement of the upper and lower welding electrodes / shank.

The supply plate 40 is moved to the left side by the driving of the riveting servo motor 46, and air pressure is supplied into the air cylinder 32 so that the fixing pin 34 is provided with the rivet-steel plate reservoir 24. Is transported into).

Thus, when the rivet-steel plate 38 seated at the seating hole 42 of the supply plate 40 is transferred to the left side together with the supply plate 40, the upper and lower welding electrodes / shanks 52a and 52b are provided. Are respectively moved in close contact with the rivet-steel plate 38.

At this time, the fixing pin 34 transferred into the rivet-steel storage container 24 in the air cylinder 32 serves as a stopper to prevent the rivet-steel plate immediately above.

Figure 6 (c) shows the state that the rivet-steel plate is in close contact with the bonding object.

That is, when the upper and lower welding electrodes / shanks 52a and 52b press the upper and lower surfaces of the rivet-steel plate 38, respectively, the rivet-steel plate 38 is brought into close contact with the metal object 50 to be joined. .

FIG. 6 (d) shows a state in which the rivet-steel sheet is weld riveted to the joined object.

The upper and lower welding electrodes / shanks 52a and 52b weld rivet the rivet-steel plate 38 to the metal object 50 to be bonded, thereby joining the metal object 50 to be bonded.

More specifically, as shown in the accompanying FIG. 7, when the upper and lower welding electrodes / shanks 52a and 52b press the upper and lower surfaces of the rivet-steel plate 38, respectively, 42, it is brought into close contact with the metal object 50 to be joined, and the center of the rivet-steel plate 38 is successively spot welded, and at the same time between the outer peripheral portion of the rivet-steel plate 38 and the metal object 50 to be joined. In the spot welding at the boundary portion, the alloying by the heat proceeds to be bonded to each other.

6 (e) and 6 (d) show the process after the bonding between the rivet-steel plate and the bonding object is made.

That is, the supply plate 40 is moved to the right again by the driving of the riveting servo motor 46, and the seating hole 42 of the supply plate 40 is again a rivet-steel plate reservoir 24. And the right side of the feed plate 40 pushes the fixing pin 34 into the inside of the air cylinder 32, and eventually the rivet-steel plate 38 is again supplied to the feed plate 40. It is seated in the seat 42 of.

On the other hand, as shown in Figure 8, when not loading a separate rivet-steel plate, the upper and lower welding electrodes / shanks (52a, 52b), as in the conventional spot resistance welder is directly bonded to the metal material 50 ), Spot welding for joining the metals to be joined can be performed separately.

1 is a perspective view showing a spot riveting device for joining dissimilar materials according to the present invention,

Figure 2 is a front view showing a spot riveting device for joining dissimilar materials according to the present invention,

Figure 3 is a side view showing a spot riveting device for joining dissimilar materials according to the present invention,

Figure 4 is an enlarged view showing the main portion showing the rivet-steel plate receiving means of the spot riveting device for joining dissimilar materials according to the present invention,

Figure 5 is a perspective view showing the structure of the supply plate of the configuration of the rivet-steel plate receiving means of the spot riveting device for joining dissimilar materials according to the present invention,

Figure 6 is a cross-sectional view illustrating the operating flow of the spot riveting device for joining dissimilar materials according to the present invention,

7 and 8 are cross-sectional views illustrating that the bonding object is bonded by a spot riveting device for joining dissimilar materials according to the present invention;

Figure 9 is a schematic diagram illustrating a conventional light metal and dissimilar material bonding method.

<Explanation of symbols for the main parts of the drawings>

10 frame 12 slide groove

14a: upper gun

14b: lower gun 16: rivet-steel supply pipe

18: main arm 20: first quarter arm

22: second branch arm 24: rivet-steel plate reservoir

26: support plate 28: the first hole

30: second hole 32: air cylinder

34: fixed pin 36: servo motor for access

38: rivet-steel plate 40: supply plate

42: seating hole 44: step locking portion

46: riveting servo motor 48a: upper pressurized servo motor

48b: Servomotor for lower pressurization 50: Metal object to be joined

52a: upper welding electrode / shank 52b: lower welding electrode / shank

54: rail groove

Claims (6)

A frame having a slide groove formed at an upper end thereof; An upper gun coupled to the upper and lower slide grooves of the frame to be lowered and a lower gun coupled to a lower portion of the frame; Upper and lower rivet-steel supply pipes connected to the upper and lower guns; Rivet-steel plate receiving means fastened to the lower end of the upper gun and the upper end of the lower gun, respectively, to receive a rivet-steel plate from the upper and lower rivet-steel supply pipes; Upper and lower access servomotors respectively mounted to upper and lower ends of the frame to drive the upper and lower guns in a lowering direction; Upper and lower pressurizing servomotors mounted on the upper and lower guns so as to be lowered and lowered respectively; Upper and lower welding electrodes / shanks mounted on the upper and lower pressurizing servomotors to be able to move up and down to bond the rivet-steel plate to a metal object to be bonded or spot weld the metal object to be bonded; Spot riveting device for joining dissimilar materials, characterized in that configured to include. The method according to claim 1, The upper and lower guns are: A main arm coupled to the slide groove of the frame to be lifted and lowered; First and second branching arms branched bifurcated at the ends of the main arm; A cylindrical rivet steel plate reservoir provided in the second branch arm and connected to the rivet steel plate supply pipe; A support plate bent outwardly from the end of the first branch arm; Spot riveting device for joining dissimilar materials, characterized in that consisting of. The method according to claim 2, A first hole is formed through the support plate bent portion of the first branch arm left and right, and a second hole coinciding with the first hole is formed through the inner portion of the bottom of the rivet-steel plate reservoir of the second branch arm. Spot riveting device for joining dissimilar materials. The method according to claim 2, At the bottom of the rivet-steel plate reservoir of the second branch arm, an outer cylinder is mounted at an outer portion thereof, and an air cylinder connected to an air supply means is mounted therein, and a fixing pin pressurized to the inside of the rivet-steel plate reservoir is embedded therein. Spot riveting device for joining dissimilar materials. The method according to claim 1, The rivet-steel receiving means is: A supply plate seated on the support plate of the first branch arm and simultaneously transported from side to side through the second hole of the first hole and the rivet-steel plate reservoir; A seating hole formed through one side of the supply plate so that the rivet-steel plate in the rivet-steel plate storage container is seated; A riveting servo motor mounted on the other side of the supply plate to transfer the supply plate left and right; Spot riveting device for joining dissimilar materials, characterized in that consisting of. The method according to claim 1 or 2, Body of the upper and lower pressurizing servomotor is mounted to the rail groove formed at the branching point of the first and second branch arm from the main arm so as to be able to lift and lower, respectively joined from the body of the upper and lower pressurizing servomotor The upper and lower welding electrodes / shanks protruding toward the target metal material are disposed between the first and second branch arms, the spot riveting device for joining dissimilar materials.

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