KR20010039486A - A automatic insertion machine for hair pin of heat exchanger - Google Patents

Abstract

PURPOSE: A hair pin inserter automatizes hair pin inserting work to reduce assembling time. CONSTITUTION: A hair pin inserter comprises a workbench(30), a hair pin guiding device(50), a hair pin pushing device(60), a heat exchanger clamping device(80) and a hair pin guide plate. The workbench(30) is where a heat exchanger(1) comprising a first and a second end plates and multiple flat plate fins is placed. The hair pin guiding device(50) is installed on one end of upper surface of the workbench(30) with a certain distance with one side of the heat exchanger(1) and inserted into the multiple penetrating holes on side surface of the heat exchanger(1) to contact with cut ends of multiple hair pins supplied to the upper surface of the workbench(30) concentrically. The hair pin pushing device(60) is installed on the other end of the upper surface of the workbench(30) facing the hair pin guide device(50) with the heat exchanger(1) interposed between to push the cut ends of the hair pins supplied to be inserted into the penetrating holes formed on the side of the heat exchanger(1). The heat exchanger clamping device(80) is installed on both sides of the heat exchanger(1) on the upper surface of the workbench(30) to clamp the both sides of the heat exchanger(1) placed on the workbench(30). The hair pin guide plate is installed between the heat exchanger(1) and the hair pin pushing device(60) on the upper surface of the workbench(30) to place a certain amount of hair pins.

Description

Automatic hairpin inserter of heat exchanger {A AUTOMATIC INSERTION MACHINE FOR HAIR PIN OF HEAT EXCHANGER}

The present invention relates to an automatic hairpin inserter of a heat exchanger, and more particularly, to automatically insert a hairpin inserted at right angles to a plurality of flat plate fins made of aluminum in a heat exchanger. A hairpin automatic inserter of a heat exchanger.

As shown in FIG. 1, the conventional heat exchanger 1 is arranged side by side on both sides with a predetermined distance from each other to support the whole of the heat exchanger 1 while providing the first and second end plates 10a. 10b and a plurality of flat plate pins arranged at regular intervals between the first end plate 10a and the second end plate 10b at right angles to the direction in which the air flows. 12) and the first end plate 10a, the plurality of plate pins 12, and the second end plate 10b are inserted at right angles in the order of the first and second end plates 10a, 10b and the plurality of plate pins ( 12 is connected to one assembly (Assembly) and a plurality of hairpins (14) for allowing the refrigerant to flow therein, and one of the pair of opening holes (14a) formed in one end of the hairpins (14) A plurality of hairpins 14 are connected to an adjacent portion of a pair of pairs of opening holes 14a formed at one end of the other hairpins 14 so that a plurality of hairpins 14 are connected with one refrigerant. Line (Pass Line) into a plurality of return bend sealed fixing achieve; consists of (16 Bend Return).

In this case, one end of the first and second end plates 10a and 10b and the plurality of flat plate pins 12 may be inserted into one end of the plurality of hairpins 14 in pairs of cuts 14a. A plurality of through holes 18 are formed at predetermined heights and intervals corresponding to each other.

The plurality of hairpins 14, half of the central portion with respect to the entire length is bent into an arc by bending processing to form a symmetrical side by side, one end of the pair of two pairs of the same length Cut portions 14a are formed.

In the drawing, reference numeral 20 indicates that the first and second end plates 10a and 10b and the plurality of plate fins 12 are aligned with each other at a predetermined interval before the heat exchanger 1 is assembled into one assembly. And at the same time a plurality of conveying mechanisms which are used so that they can be easily transported to the next working position.

That is, the plurality of conveying mechanisms 20 are fixed to the block 22 having a handle function and horizontally side by side at a predetermined interval on one side of the block 22 so that the first and second end plates ( It consists of a plurality of insertion rods 24 temporarily inserted into the through holes 18 formed in the 10a) (10b) and the plurality of flat plate pins (12).

Next, conventionally configured as described above, in order to insert the hairpin 14 into the flat fin 12 in the heat exchanger 1, first, between the first end plate 10a and the second end plate 10b. After the plurality of flat plate pins 12 are arranged to maintain a predetermined interval, the insertion rods 24 of the plurality of transport mechanisms 20 separately prepared are provided with the first and second end plates 10a and 10b. The first and second end plates 10a and 10b and the plurality of flat plate pins 12 are respectively inserted by inserting the plurality of through holes 18 respectively formed in the flat plate pins 12 into the through holes 18 located at both ends thereof. Is more precisely aligned and at the same time it is easy to transport to the assembly work line of the hairpin 14, which is the next assembly step by the temporary assembly of the transport mechanism (20).

That is, the first and second end plates 10a and 10b and the plurality of flat plate pins 12 have a plurality of through holes 18 in a two-row zigzag shape so that the plurality of hairpins 14 can be inserted in the plane thereof. ) And the plurality of through-holes 18 drilled into the first and second end plates 10a and 10b and the plurality of flat plate pins 12, respectively. Alignment must be done first so that it can be inserted at right angles.

For this reason, the plurality of conveying mechanisms 20 are manufactured separately and temporarily assembled in the through holes 18 drilled through the first and second end plates 10a and 10b and the plurality of flat plate pins 12. After the plurality of hairpins 14 are inserted into the plurality of through holes 18 in which the transport mechanism 20 is not inserted, the number of other holes in the portion of the plurality of through holes 18 into which the transport mechanism 20 has been inserted. The hairpins 14 are separated by hand so that they can be inserted.

However, in the conventional hairpin insertion method of the heat exchanger configured as described above, the plurality of hairpins 14 are repeated one by one each time on the first and second end plates 10a and 10b and the plurality of flat plate fins 12 by hand. By assembling (inserting), the fatigue of the operator is increased according to the same operation, as well as the assembly takes a long time there was a problem that mass production is impossible.

In addition, the inner circumference of the through hole 18 when the cutout portion 14a of the hairpin 14 is inserted into the through hole 18 drilled through the first and second end plates 10a and 10b and the plurality of flat plate pins 12. As the edge of the cutout portion 14a is crushed due to frictional resistance between the cutout portion 14a and the outer periphery of the cutout portion 14a, there is a problem in that the expansion work is caused.

Therefore, the present invention has been made to solve the above problems, an object of the present invention is to automatically insert simultaneously when inserting a plurality of hairpins on the first and second end plates and a plurality of flat plate pins at the same time, during assembly The present invention provides a heat exchanger's hairpin automatic inserter that can be mass-produced by eliminating deflection problems.

1 is a perspective view showing the manual operation of the flat fin and the hair fin of the heat exchanger according to the prior art,

2 is an overall plan view showing an automatic hairpin inserter of a heat exchanger according to the present invention;

3 is a longitudinal cross-sectional view taken along line A-A of FIG. 2 according to the present invention;

4 is a side cross-sectional view taken along line B-B of FIG. 2 according to the present invention;

Figure 5 is a cross-sectional view showing a guide rod is in close contact with the hairpin through the through hole of the heat exchanger according to the present invention;

Figure 6 is a cross-sectional view showing the upper layer hairpin inserted into the through hole of the heat exchanger according to the present invention;

Figure 7 is a main sectional plan view showing a state in which the guide rod and the push rod separated from the hairpin according to the present invention.

Explanation of symbols on the main parts of the drawings

1: heat exchanger 10a, 10b: first and second end plates

12: flat plate pin 14: hairpin

14a: cutting part 14b: bend

30: workbench 40: hairpin supply means

41: upper and lower rail 42: top plate

44: first cylinder 45: loading box

46: second cylinder 47: push rod

48: bullet member 49: buffer member

50: hairpin guide means 52: the first rail

53: third cylinder 55: second rail

56 connection member 57 moving member

58: guide rod 59: fixing member

60: hairpin push means 62: the third rail

63: fourth cylinder 65: fourth rail

66: push rod 80: heat exchanger clamp means

83: moving member 84: cylinder

85: fixing member 90: hairpin guide plate

91,92: Information Home

Hairpin automatic inserter of the heat exchanger according to the present invention made to achieve the above object, the worktable for seating the heat exchanger aligned with the first and second end plate and a plurality of flat plate fins, the heat exchanger with respect to one end of the upper surface of the workbench A hairpin guide means installed at a predetermined distance on one side of the machine and inserted into a plurality of through holes drilled in the side surface of the heat exchanger and concentrically contacting the cut portions of the plurality of hairpins supplied to the upper surface of the work bench; Hairpin push means for pushing the cut-off portion of a predetermined amount of hairpins installed at a predetermined distance facing the hairpin guide means with the heat exchanger interposed therebetween so as to be inserted into a plurality of through holes drilled in the side surface of the heat exchanger; Thermal bridges installed on both sides of the heat exchanger with respect to the upper surface of the workbench Characterized in that the heat exchanger clamping means for clamping both sides of the group, respect to the top surface of the bench is arranged between the heat exchanger and the hairpin push means consisting of a hair pin guide plate which rests a certain amount of hairpins.

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

For reference, the same components and the same reference numerals are assigned to the same components as the conventional components in the drawings, and detailed description thereof will be omitted.

The hairpin automatic inserter of the heat exchanger according to the present invention, as shown in Figures 2 and 3, the heat exchanger (aligned only with the first and second end plates 10a, 10b and a plurality of flat fins 12) 1) the worktable 30 for seating at a predetermined position on the upper surface, and is installed in close proximity to one end of the heat exchanger 1 is seated with respect to the intermediate distance of the worktable 30 to stack a plurality of hairpins (14) stacked The hairpin supply means 40 for supplying a plurality of hair fins 14 to the upper surface of the work table 30 by a predetermined amount and the heat exchanger 1 with respect to one end of the upper surface of the work table 30 are interposed therebetween. It is installed at a distance opposed to the hairpin supply means 40 and inserted horizontally into the plurality of through holes 18, which are drilled in two rows in the transverse direction perpendicular to the side of the heat exchanger 1, and at the same time on the upper surface of the work table 30. Hairpin guy in concentric contact with the cutouts 14a of the plurality of hairpins 14 supplied Means 50 and the other side of the upper surface of the work table 30 is installed at a distance facing the heat exchanger 1 with the hairpin supply means 40 interposed therebetween and supplied by the hairpin supply means 40. Hairpin push means 60 for pushing a predetermined amount of cut portions 14a of the hairpin 14 into a plurality of through holes 18 bored at right angles to the sides of the heat exchanger 1, and the work table. Heat exchanger clamp means 80 which is installed between the hairpin guide means 50 and the hairpin supply means 40 with respect to the upper surface of 30 to clamp the left and right sides of the heat exchanger 1 placed on the work bench 30. And a hairpin guide plate 90 which is installed at a lower portion of the loading box 42 with respect to the upper surface of the work table 30 to divide and seat a predetermined amount of hairpins 14 in two rows in a vertical direction.

That is, the hairpin supply means 40, as shown in Figure 3, a plurality of upper and lower rails 41 fixed to have the same height perpendicular to each of the left and right ends with respect to the predetermined position of the upper surface of the work table 30 And a bracket between a plurality of upper and lower rails 41 mounted on the upper surfaces of the plurality of upper and lower rails 41 and horizontally fixed to the upper and lower surfaces of the upper and lower rails 41, respectively. 43, the left and right lower ends of the pair of first cylinders 44 fixed to each other and the rods 44a of the pair of cylinders 44 are fixed to the left and right sides, and the plurality of upper and lower rails 41 and A pair of storage boxes 45 accommodated in the space partitioned by the upper plate 42 and installed in the vertical direction to stack the plurality of hairpins 14 and the plurality of upper and lower rails 41, respectively. The left and right ends of the second cylinder 46 and the pair of second cylinders 46 are A pushpin 47 for horizontally connecting and dropping a plurality of first and second row hairpins 14 arranged in a horizontal direction at a lower side of the plurality of hairpins 14 loaded in the loading box 45 in sequence according to a work process. And a plurality of pairs of bullet members 48 installed in the lower opening of the stacker 45 to support the plurality of hairpins 14 loaded in the storage grooves 45a in the stacker 45 so as not to fall naturally by elasticity. It consists of).

At this time, the rod (44a) is compensated by the distance that the stacking box 45 is moved left and right while reciprocating in the opposite direction when the pair of the first cylinder 44 is driven.

The loading box 45 is formed by loading a wall surface 45b vertically oriented in a direction opposite to the heat exchanger 1 with respect to one side end thereof, and in a direction opposite to the wall surface 45b with respect to the other end thereof. Opening portion 45c for guiding the plurality of hairpins 14 to be stacked up and down into the inside of the 45 and vertically formed at two centers on the left and right sides thereof, so that the push rod 47 is positioned in the horizontal direction. It consists of a pair of slot 45d which guides up and down while holding.

The push rod 47 penetrates through the slot 45d formed on the left side of the loading box 45, and both ends thereof are connected to the pair of second cylinders 46 via the buffer member 49, respectively.

The pair of bullet members 48 are inclined such that the ends thereof face inwards while being fixed to both ends of the lower opening with respect to the receiving grooves 45a formed vertically at regular intervals in the stacking box 45, respectively.

On the other hand, the hairpin guide means 50, as shown in Figure 2, has a fixed left and right length at the center of one side (left side) of the work table 30, both ends are fixed by a pair of left and right brackets 51 One rail 52, a third cylinder 53 coupled to the outer circumference of the first rail 52 and moved left and right along the first rail 52, and one side (left) front and rear sides of the work table 30 The center is fixed to one side end of the pair of front and rear pairs of second rails 55 and the third cylinder 53 having fixed lengths at the edges and both ends thereof are fixed by a pair of left and right brackets 54. The connection member 56 is coupled to the outer circumference of the second rail 55 to move left and right along the second rail 55 and maintains a balance, and a center is connected to the other end of the third cylinder 53. The moving member 57 which is moved left and right together with the three cylinders 53, and at one side end (right end) of the moving member 57, has a predetermined distance up and down and up and down A pair of upper and lower side guide rods 58 installed in the transverse direction and inserted into a plurality of through-holes 18, each end of which is inserted into a plurality of through-holes vertically perpendicular to the side surface of the heat exchanger 1; The free end side of a pair of upper and lower side guide bars 58 is comprised by the fixing member 59 which moves to the predetermined position simultaneously.

At this time, the ends of the pair of guide rods 58 on the upper and lower sides gradually widen so as to form concentricity while the cutting portions 14a of the hairpin 14 are fitted only to a predetermined width, as shown in FIGS. 6 to 8. The wedge surface 58a which has an outer diameter is formed.

On the other hand, the hairpin push means 60, as shown in Figure 2, has a fixed left and right lengths in the center of the other side (right side) of the worktable 30, both ends are fixed by a pair of left and right brackets 61 A third cylinder 62, a fourth cylinder 63 coupled to the outer circumference of the third rail 62 and moved left and right along the third rail 62, and the front and rear sides of the other side (right side) of the work table 30. The center is fixed to one side of the front and rear pair of fourth rails 65 and the four cylinders 63 having a fixed length at the edge and fixed at both ends by a pair of left and right brackets 64, and both ends are Coupled to the outer circumference of the fourth rail 65 and moved left and right along the fourth rail 65, one side end (left end) of the hairpin guide plate 90 in the upper and lower side two rows in the horizontal direction at regular intervals Consists of a push rod 66 that is in close contact with the bent portion 14b of the hairpin 14 placed at the same time to push at a time.

At this time, in the transverse direction with respect to the upper and lower sides of one side end (left end) of the push rod 66, as shown in Fig. 5, the concave so as to be in close contact with the outer curved surface of the bent portion 14b of the hairpin (14). The curved surface 66a is repeatedly formed at a predetermined interval.

On the other hand, the heat exchanger clamp means 80, as shown in Figure 2, a pair of brackets (81) fixed at a predetermined distance to the left and right sides of the front surface front and rear of the work table 30, and the bracket 81 And a pair of fifth rails 82 which are slid to the left and right, and fixed to one side end (right end) of the pair of fifth rails 82 and simultaneously move left and right with the fifth rail 82. The movable member 83 for clamping or releasing the heat exchanger 1 placed on the upper surface of the work table 30 and the predetermined position of the pair of fifth rails 82 are respectively fixed to the left and right sides of the fifth rail 82. It consists of a pair of cylinders (84) for moving to, and a fixing member (85) fixed to one side of the upper surface of the work table (30) to provide a reference surface to which one side end of the heat exchanger (1) is in close contact.

At this time, the upper and lower side pairs of through-holes 83a and 85a respectively pass through the moving member 83 and the fixing member 85 so that the pair of guide rods 58 on the upper and lower sides of the hairpin guide means 50 pass therethrough. Formed.

On the other hand, the upper surface of the hairpin guide plate 90, as shown in Figures 2 and 3, a plurality of through-holes 18 formed at regular intervals in the horizontal direction in the upper and lower sides of the heat exchanger 1 in two rows. A plurality of upper and lower side guide grooves (91, 92), each of which is opened so as to correspond to the position of the upper and lower side guide grooves (91, 92) are formed, respectively, the plurality of upper and lower side guide grooves (91, 92) 90 are alternately formed alternately along the longitudinal direction.

Next, the operation and effect of the present invention configured as described above will be described.

First, the first and second end plates 10a and 10b and the plurality of flat plate pins 12 are aligned with the conveying mechanism 20 used in the related art, and at the same time, the first and second end plates 10a and 10b are aligned. And the movable member 83 and the fixing member 85 of the heat exchanger clamp means 80 installed on the upper surface of the work table 30 using the transport mechanism 20 in a state in which the plurality of flat plate fins 12 are aligned. After transporting and seating in between, the transport mechanism 20 is again manually removed from the first and second end plates 10a and 10b and the plurality of plate pins 12, as shown in FIG.

Then, when the pair of cylinders 84 are driven, the fifth rail 82 is moved to one side (right) according to the driving of the cylinders 84 and moved by simultaneously moving the moving member 83 fixed at the end thereof. The heat exchanger 1 seated between the member 83 and the fixing member 85 is firmly supported at a predetermined pressure.

On the other hand, the plurality of hairpins 14 are stacked in a plurality of storage grooves 45a installed in the loading box 45 through the opening 45c of the loading box 45 of the hairpin supplying means 40.

At this time, the plurality of hairpins 14 in the plurality of storage grooves 45a are not naturally dropped by the elastic member 48, which is elastically installed to narrow the lower opening of the storage groove 45a, respectively, as shown in FIG. Is stopped.

In this state, when the pair of second cylinders 46 on the hairpin supplying means 40 are lowered, these second cylinders 46 are both ends of the second cylinders 46 while keeping the horizontals along the upper and lower rails 41, respectively. The connected push rod 47 is lowered by a predetermined distance. At this time, a row of hairpins 14 positioned in the transverse direction under the receiving groove 45a is pushed by the push rod 47 by the receiving groove 45a. Lower the guide groove (92) of the hairpin guide plate 90 is installed on the upper surface of the worktable 30 at a predetermined distance to the lower portion of the stacking box (45) while pushing the carbon member 48 installed in the lower opening of the Each seats correctly).

That is, when the push rod 47 is pressed at a predetermined pressure, a row of hairpins 14 stored at the lower end of the accommodating groove 45a pass while pushing the carbon member 48 installed at the lower opening of the accommodating groove 45a to the outside. It is lowered to the bottom, the remaining plurality of hairpins 14 is not passed through by the inclination angle of the resilient member 48 is restored to the inside is to stay in the receiving groove (45a).

In addition, the push rod 47 is indirectly exerted by the buffer member 49 interposed in the connection portion between the second cylinder 46 and the push rod 47 when the push rod 47 is lowered by the lowering operation of the second cylinder 46. Since it is received, the pressure is not applied to the plurality of hairpins 14 stored in the receiving groove 45a.

Then, after a row of hairpins 14 are seated in the lower guide groove 92 of the hairpin guide plate 90, the stacking box 45 is operated by a pair of first cylinders 44 respectively installed on the bottom outer side thereof. Is moved to the side by a predetermined position.

That is, the loading box 45 is another upper guide groove 91 formed on the upper surface of the hairpin guide plate 90 and the receiving groove in the loading box 45 when moved to the side according to the driving of the first cylinder 44. 45a) are coincident with the same vertical line, and the upper guide groove 91 is the lower guide groove 92 as described above, and the lower end of the receiving groove 45a is similar to the operation sequence in which the hairpin 14 is seated. Another line of hairpins 14 housed in it is supplied.

On the other hand, when the fourth cylinder 66 of the hairpin pushing means 60 is operated, as shown in FIG. 2, the fourth cylinder 63 is moved to one side (left side) by the guidance of the third rail 62. While moving the push rod 66 fixed to the upper surface of the fourth cylinder 63 at the same time in the same direction.

At this time, since both ends of the push rod 66 are supported to be movable by the fourth rails 65 respectively installed at the front and rear ends of the upper surface of the worktable 30, the push rod 66 moves at the same speed while balancing the whole of the push rod 66. Balancing role should be as possible.

That is, the plurality of curved surfaces 66a of the upper and lower sides that are formed at one side end (left side) of the push rod 66 at regular intervals in the vertical direction in two rows in the vertical direction are push rods 66 by the fourth cylinder 63. Are simultaneously moved in close contact with the bent portions 14b of the plurality of hairpins 14 seated in the pair of upper and lower guide grooves 91 and 92 formed on the hairpin guide plate 90 while being simultaneously moved. The hairpin 14 will be moved.

At this time, the plurality of curved surfaces 64c formed at the ends of the push rod 66 are in contact with the bent portions 14b of the plurality of hairpins 14 so that the shapes of the bent portions 14b do not become distorted when pushed. At the same time a push is applied so that the entirety of the plurality of hairpins 14 can be moved under a uniform force.

Meanwhile, when the third cylinder 53 of the hairpin guide means 50 is operated, as shown in FIG. 2, the third cylinder 53 is moved to one side (right side) by the guidance of the first rail 52. The connecting member 56 and the moving member 57 fixed to the lower and upper surfaces of the third cylinder 53 are moved simultaneously in the same direction.

At this time, since both ends of the connecting member 56 are supported by the second rail 55 respectively installed at the front and rear ends of the upper surface of the worktable 30, the connecting member 56 moves at the same speed while balancing the entirety of the connecting member 56. At the same time, it plays a role of balancing so as to move at the same speed while balancing the whole of the movable member 57 fixed to the upper surface of the third cylinder 53.

As shown in FIG. 2, the pair of guide rods 58 arranged on the one side end (right side) of the movable member 57 at a predetermined interval in the horizontal direction in two rows are arranged as shown in FIG. 2. The wedge surface 58a formed at the end of the heat exchanger clamp means 80 passes through each of the plurality of through holes 83a formed in the movable member 83 at the heat exchanger clamp means 80 and moves simultaneously. Simultaneously inserted into a plurality of through-holes 18 drilled in two rows laterally perpendicular to the side, only a portion of the end portion including the wedge surface 58a passes through the heat exchanger 1 and protrudes to the outside on the opposite side. The hairpin guide plate 90 is in close contact with the pair of guide grooves 91 and 92 concentrically with the cutout portions 14a of the plurality of hairpins 14 seated in two rows in the transverse direction.

At this time, since the maximum outer diameter surface of the wedge surface 58a is formed with a diameter larger than the inner diameter surface of the cut portions 14a formed at one end of the plurality of hairpins 14, the inner diameter of the cut portion 14a is the wedge surface 54c. By being caught on the outer peripheral surface of the middle of the can not be inserted any more closely close to each other, the horizontal length side of the pair of guide rods 58 and the hairpin 14 of the upper and lower sides of course maintain the same horizontal and concentric, as well as a plurality of hairpins (14) At the time of assembling the through hole 18 and the foreign matter through the cutout portion 14a, it blocks and prevents the edge of the cutout portion 14a from being crushed to achieve concentricity.

Therefore, as shown in Fig. 5, the bent portion 14b of the hairpin 14 is in close contact with the pair of upper and lower side curved surfaces 66a formed on the push rod 66, and the pair of guide rods 58 on the upper and lower sides are in close contact with each other. The push rod 66 moves forward (moves to the right) in a state in which the cut portion 14a of the hairpin 14 is in close contact with the formed wedge surface 58a, and the pair of guide rods 58 of the upper and lower sides are reversed (left side). Operation), the hairpin 14 interposed between the push rod 66 and the pair of upper and lower guide bars 58 is moved to the heat exchanger 1 side, and the hairpin 14 side cutout portion 14a is moved. By inserting the through holes 18 of the first end plate 10a on the heat exchanger 1 side, the through holes 18 of the plurality of flat plate fins 12, and the through holes 18 of the second end plate 10b. In the same manner as in Fig. 6, a certain amount of hairpins 14 are assembled to the heat exchanger 1 at a time.

Then, after the plurality of hair fins 14 are assembled in the heat exchanger 1 including the first and second end plates 10a and 10b and the plurality of flat plate fins 12, the solid arrow direction shown in FIG. Likewise, the upper and lower side pairs of guide rods 58 are further retracted according to the reverse (moving to the left) operation of the third cylinder 53 to be positioned in an initial state, whereby the wedge surfaces 58a of the pair of upper and lower side guide rods 58 are positioned. ) And the cutting portion 14a of the hairpin 14 are separated, and the push rod 66 is positioned in an initial state according to the reverse (moving to the right) operation of the fourth cylinder 63 so that the push rod 66 The contact between the curved surface 66a and the bent portion 14b of the hairpin 14 is separated.

Further, after the first and second end plates 10a and 10b and the plurality of flat fins 12 are assembled with the plurality of hairpins 14, the heat exchanger clamp means 80 is clamped by the reverse operation described above. The heat exchanger 1 is separated from the heat exchanger 1 while being released, and the heat exchanger 1 is transported to the assembly process line of the hairpin 14 and the return bend 16, which is the next process.

As described above, the automatic hairpin inserter of the heat exchanger according to the present invention can automatically simultaneously insert a plurality of hairpins into a plurality of through holes formed in the first and second end plates and the plurality of flat plate fins at the same time. Since the structure of the present invention can eliminate the increase of worker's fatigue and assembly defects that occur when the hairpins are handmade one by one as in the prior art, the assembly time can be shortened, and the mass production can be performed.

Claims (13)

A worktable for seating a heat exchanger arranged with first and second end plates and a plurality of flat fins; It is installed with a predetermined distance on one side of the heat exchanger with respect to one side end of the upper surface of the workbench and inserted into a plurality of through holes drilled in the side surface of the heat exchanger, and is concentrically contacted with the cut portions of the plurality of hairpins supplied to the upper surface of the workbench. Hairpin guide means, The cutting part of the hairpin provided at a predetermined distance opposed to the hairpin guide means with the heat exchanger interposed with respect to the other end of the upper surface of the work table is pushed to be inserted into a plurality of through holes drilled in the side of the heat exchanger. Hairpin push means, Heat exchanger clamp means for clamping both sides of the heat exchanger placed on both sides of the heat exchanger with respect to the upper surface of the work table and placed on the work target; The hairpin automatic inserter of the heat exchanger, characterized in that composed of a hairpin guide plate which is installed between the heat exchanger and the hairpin pushing means with respect to the upper surface of the workbench to seat a predetermined amount of hairpins. The method of claim 1, The hairpin guide means, the first and second rails are installed at a predetermined distance apart from one side of the workbench, A third cylinder coupled to an outer circumference of the first rail and moved left and right along the first rail; A connection member having a center fixed to one end of the third cylinder and both ends coupled to an outer circumference of the second rail to move left and right along the second rail to maintain balance; A moving member having a center connected to the other end of the third cylinder and simultaneously moving left and right with the third cylinder; Guide rods each installed in a horizontal direction at predetermined intervals at one end of the moving member and inserted at a plurality of through-holes of which their ends are drilled on the side of the heat exchanger; Hairpin automatic inserter of the heat exchanger, characterized in that consisting of a fixing member for guiding the guide rod. The method of claim 2, The tip end of the guide rod, the hairpin automatic inserter of the heat exchanger, characterized in that the cut portion of the hairpin constitutes a wedge surface having an outer diameter gradually widening so as to be concentric with only a predetermined width. The method of claim 1, The hairpin pushing means, and the third and fourth rails are installed at a predetermined distance from the other side of the workbench; A fourth cylinder coupled to an outer circumference of the third rail and moved left and right along a third rail; The center is fixed to one side end of the fourth cylinder, and both ends are coupled to the outer circumference of the fourth rail to move left and right along the fourth rail, and one end thereof is placed at a predetermined interval on the upper surface of the hairpin guide plate. Automatic hairpin inserter of the heat exchanger, characterized in that consisting of a push rod that is in close contact with the bent portion of the hairpin. The method of claim 4, wherein One side end of the push rod, the hairpin automatic inserter of the heat exchanger, characterized in that the curved surface formed repeatedly formed in two horizontal rows so as to be in close contact with the outer surface of the bent portion of the hairpin. The method of claim 1, The heat exchanger clamp means includes a moving member for clamping or releasing a heat exchanger placed on an upper surface of the work table; A cylinder connected to the moving member; The hairpin automatic inserter of the heat exchanger, characterized in that the fixing member is fixed to one side of the upper surface of the workbench to be in close contact with one end of the heat exchanger. The method according to claim 1 or 6, The moving member and the fixing member, the hairpin automatic inserter of the heat exchanger, characterized in that the through-holes formed in each of the two columns in the horizontal direction so as to pass through the guide rod of the hairpin guide means. The method of claim 1, The upper surface of the hairpin guide plate, the upper portion is opened so as to correspond to the plurality of through-holes formed at a predetermined interval in the horizontal direction of the upper and lower rows of two rows of the heat exchanger, characterized in that a plurality of guide grooves different in the vertical height Automatic hairpin inserter in heat exchanger. The method of claim 1, Heat exchanger characterized in that it is installed on one side end of the heat exchanger seated with respect to the intermediate distance of the workbench stacking the plurality of hairpins stacked and supplying a plurality of hairpins to the hairpin guide plate by a predetermined amount Hairpin automatic inserter. The method of claim 9, The hairpin supply means, a plurality of upper and lower rails installed at the same height at a predetermined position on the upper surface of the work table, An upper plate fixed on the upper surface of the plurality of upper and lower rails to maintain horizontality; First cylinders respectively fixed to the center between the plurality of upper and lower rails by a bracket with respect to the upper and lower sides of the working table; A left and right lower ends fixed to the rods of the cylinder and moved left and right, and are accommodated in a space partitioned by the plurality of upper and lower rails and the upper plate to stack the plurality of hairpins in a vertical direction; Second cylinders which are installed on the plurality of upper and lower rails, respectively; And the left and right ends are horizontally connected to the second cylinder and the push rod to sequentially drop a plurality of hairpins located in the horizontal direction at the bottom of the plurality of hairpins loaded in the loading box in sequence according to the work process, The hairpin automatic inserter of the heat exchanger is installed in the lower opening of the stacker and configured to support a plurality of hairpins loaded in the storage grooves in the stacker so as not to fall naturally by the elastic force. The method of claim 10, The loading box is a wall surface perpendicular to the direction opposite to the heat exchanger with respect to one side end thereof, An opening part which is formed in a direction opposite to the wall surface with respect to the other end thereof to guide the plurality of hairpins to be stacked up and down into the inside of the loading box; The hairpin automatic inserter of the heat exchanger, characterized in that it is formed in each of the two centers on the left and right sides to guide the rod to move up and down while maintaining the horizontal direction. The method of claim 10, The push rod is inserted through the slot formed on the left side of the loading box, both ends of the hairpin automatic inserter of the heat exchanger, characterized in that connected to the second cylinder via a buffer member, respectively. The method of claim 10, The ballistic member is fixed to the both ends of the lower opening with respect to each of the receiving grooves formed vertically at a predetermined left and right intervals in the stacking box, the end of the hairpin automatic inserter of the heat exchanger characterized in that inclined to face inward.