JP2002035868A - Pipe expanding apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a pipe expanding apparatus which is able to improve transferring efficiency and build up an ideal production line by adopting the system (so-called center passing system) in which the transferring route of a work is aligned, i.e., a work is carried in from one side of the expanding apparatus and carried out to the opposite side. SOLUTION: This pipe expanding apparatus is characterized in that the first guide stopper 10, 10 for making an acting plate 6, an end plate 9, and a lower side stopper 19 slide in the up and down direction, is arranged in the forward side of the acting plate 6, the end plate 9, and the lower side stopper 19, and the second ball screw 20 for making the lower side stopper 19 screw feed in the up and down direction, is arranged in the back side of the lower side stopper 19, thereby allows the distance between the first guide stopper 10, 10 and columns 3, 3 to be larger.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heat-radiating fin in which multiple radiating fins and a plurality of tubes inserted through the radiating fins are integrated by press-fitting the expanding mandrel into the tube. The present invention relates to a pipe expansion device for manufacturing an exchanger.

[0002]

2. Description of the Related Art As a conventional pipe expanding device, for example, FIG.
As shown in the figure, a pair of columns 5 erected on the base 50.
A ceiling 52 is erected over the upper ends of the first and the first 51, and a cylinder 53 is attached to the ceiling 52. A plurality of cylinders 53 are mounted on the back side of an operation plate 54 which can be moved up and down through expansion and contraction of the cylinder 53. A configuration in which mandrels 55 for pipe expansion are inserted is general.

Since the pipe expansion mandrels 55 are formed to have a long and small diameter in accordance with the diameter of the pipe of the heat exchanger, they are supported at appropriate positions so as to restrict lateral bending during press-fitting. Need to be kept. Therefore, in the pipe expanding device, a plurality of guide plates 56,... Are disposed below the operation plate 54, and an end plate 57 is further disposed at the lowest position, so that the pipe expanding mandrels 55,. ,... Are inserted through the end plate 57.

A pair of left and right guide bars 58, 58 for vertically connecting the base 50 and the ceiling 52 are inserted through the operating plate 54, the guide plates 56,... And the end plate 57. Operating plate 54,
The guide plates 56,...
It can move up and down along the guide bars 58 while maintaining a parallel relationship with each other. The operation plate 54,
The guide plates 56,... And the end plate 57 are respectively provided with suspension bolts 59,... (The right side is not shown in the figure), and heads 59a,. , The operation plate 54, the guide plates 56,...
7, the maximum opening interval is determined.

A pair of ball screws 60, 60 parallel to the guide bar 58 are inserted through the operation plate 54, the guide plates 56,... And the end plate 57, and the lower ends thereof are rotatably supported by the end plate 57. Have been. An upper stopper 61 is screwed to each of the ball screws 60. The upper stopper 61 is formed with a half-split portion that contacts the approximately half-arc surface of the cylindrical guide bar 58. When the ball screw 60 is rotated by a motor (not shown), the half-split portion becomes The upper stopper 61 is vertically screwed along the ball screw 60 while sliding along. The upper stopper 61 can pass through long holes 56a,... Formed in the guide plates 56,.

Further, a lower stopper 62 is provided between the base 50 and the end plate 57. The lower stopper 62 is provided with the guide bar 5 on the front side.
8 is inserted, and the rear side is slidably attached to a guide rail 63 fixed to the column 51. Also,
A second ball screw 64 parallel to the guide bar 58 and the guide rail 63 is provided between the guide bar 58 and the guide rail 63, and the lower end thereof is rotatably supported by the base 50. The lower stopper 62 is screwed to the second ball screw 64. Therefore, when the second ball screw 64 is rotated by a motor (not shown), the front side is the guide bar 5.
8, and the lower side stopper 62 is screwed up and down along the second ball screw 64 while sliding along the guide rail 63 on the rear side. The lower stopper 62 can be brought into contact with the back surface of the end plate 57 which is lowered by the extension of the cylinder 53.

[0007]

However, the above-mentioned conventional pipe expanding device has a guide bar 58 and a second ball screw 6.
4 and the guide rails 63 are arranged side by side to close the left and right sides of the base 50, so that the work can be loaded and unloaded from the base 50 only from the front direction P. Therefore, when constructing a production line for a heat exchanger, there is a restriction that the work is carried in from another device to the tube expanding device or the work is carried out from the tube expanding device to the other device in the left-right direction Q. A turn-up portion is formed in the transfer path of the line. As a result, not only the transfer efficiency is deteriorated, but also a special transfer mechanism for the turn-up portion is required, and the cost is also lowered.

In view of the above, the present invention has been made in view of the above-mentioned problem, and has a system in which a work transfer path is linearized, that is, a work is carried in from a side of a pipe expanding apparatus and carried out from an opposite side (a so-called center through-hole). It is an object of the present invention to provide a pipe expanding apparatus capable of increasing the transfer efficiency by adopting the method, and also capable of constructing a suitable production line.

[0009]

In order to solve the above-mentioned problems, the present invention provides a base unit 2 and a ceiling unit 4 which are vertically opposed to each other.
And, between the cylinder 5 attached to the ceiling 4 of the device frame 1 and the base 2 and the ceiling 4, which is composed of columns 3, 3 connecting the rear sides of the base 2 and the ceiling 4 up and down. Cylinder rod 5a that is interposed and expands and contracts in the vertical direction
Operating plate 6 attached to the
, And guide plates 8,... Hung and supported so as to be able to freely contact and separate from the operation plate 6, and hung so as to be able to contact and separate from the guide plate 8, which is arranged below the guide plate 8. In the tube expanding device including the supported end plate 9 and the lower stopper 19 disposed below the end plate 9, the expansion device is located in front of the operation plate 6, the end plate 9, and the lower stopper 19. Guide bars 10, 10 erected upward from the base 2, and fixed to the columns 3, 3 so as to be located behind the operating plate 6, the end plate 9, and the lower stopper 19. The operating plate 6, the end plate 9, and the lower stopper 19 are configured to be vertically slidable by the guide rails 11 and 11, and Plate 8, ... and working plate 6
Are vertically slidable by second guide rails 14 erected upward from the end plate 9 so as to be sequentially inserted through the end plate 9. The lower stopper 19 is configured to be capable of vertically screwing by a second ball screw 20 that is rotatably provided upright from the base portion 2 so as to be screwed to the side. Provide equipment.

[0010] The present invention also relates to the guide plate 8,
, And a first ball screw 15 that is rotatably erected upward from the end plate 9 so as to be sequentially inserted into the operating plate 6. The first ball screw 15 passes through the guide plates 8,. An expansion device having a configuration in which upper-side stoppers 17, 17 that can abut on the back surface of the plate 6 is provided.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIG.

In the tube expanding apparatus according to this embodiment, the base 2
A pair of pillars 3 erected upward from the rear left and right positions of the
3, a ceiling part 4 is erected over the upper end of the base part 2.
The device frame 1 is composed of the columns 3 and 3 and the ceiling 4. Further, a cylinder 5 having a cylinder rod 5 a that moves toward and away from the base 2 from the back side of the ceiling 4 is attached to the ceiling 4. A rectangular operating plate 6 is fixed to the end of the cylinder rod 5a at the center thereof, and the operating plate 6 can be moved up and down through expansion and contraction of the cylinder 5. Also,
A plurality of pipe expansion mandrels 7,... Are inserted on the back side of the operation plate 6, and as the operation plate 6 is raised and lowered, the pipe expansion mandrels 7,.

The pipe expanding mandrels 7,... Are formed to have a long and small diameter in accordance with the pipe diameter of the heat exchanger, and are supported at appropriate positions so as to restrict lateral bending during press-fitting. Need to be kept. Therefore, a plurality of guide plates 8,... And an end plate 9 are further disposed at the lowermost position below the operation plate 6, and the pipe expansion mandrels 7,. 9 is slidably inserted.

The apparatus frame 1 is provided with a pair of first guide bars 10 at left and right positions on the front side. That is, the first guide bar 10 has an upper end supported on the front side (corner) of the ceiling 4 and a lower end supported on the front side (corner) of the base 2. It is a rod that connects the part 2 and the ceiling part 4 up and down. Further, the device frame 1 includes a pair of guide rails 11 at the left and right positions on the rear side. That is, the guide rail 11 has an upper end close to the rear side (corner) of the ceiling 4 and a lower end close to the rear side (corner) of the base 2, and the left and right columns 3, 3. The rails are respectively fixed in the vertical direction.

The operating plate 6 has a pair of first guide bars 10, 10 inserted in left and right positions on the front side, and a pair of guide rails 11, 11 in the left and right positions on the rear side.
By being slidably attached to the, it is possible to move up and down while maintaining a horizontal state. More specifically, a pair of brackets 12 and 12 are attached to left and right positions of the front end face of the operation plate 6.
The first guide bar 10 is inserted into each of the pair of sliders 1 at the left and right positions on the rear end face of the operation plate 6.
3 and 13 are attached, and the sliders 13 and 13 slide on the guide rail 11 respectively.

Similarly to the operation plate 6, the end plate 9 has a pair of first guide bars 10, 10 inserted in left and right positions on the front side, and a pair of guide rails 11, 10 in the left and right positions on the rear side. By being slidably attached to 11, it is possible to move up and down while maintaining a horizontal state. More specifically, a pair of brackets 12, 12 are attached to the left and right positions of the front end face of the end plate 9, and the first guide bar 10 is inserted through the brackets 12, 12, respectively. A pair of sliders 13 is attached to the left and right positions, and the sliders 13
1 slides.

The guide plate 8 is a plate body which is appropriately arranged in plural numbers in accordance with the length of the pipe expanding mandrel 7.
Since the brackets 12, 12 are not attached to the guide plate 8, they do not engage with the first guide bars 10, 10, and the first guide bars 10, 10 are not engaged.
Are arranged at positions separated from the front side of the guide plate 8. Elongated holes 8a, 8a are formed at the left and right positions of the guide plate 8, respectively.
The second guide bar 14 and the first ball screw 15 are respectively inserted through a and 8a.

The upper ends of the second guide bars 14 and 14 are slidably inserted into holes formed vertically in the left and right positions of the operation plate 6, and the lower ends are fixed to the left and right positions of the end plate 9. , Are arranged in parallel with the first guide bars 10, 10. Also, the slot 8 of the guide plate 8
A half-slider 16 which is in contact with an approximately one-half arc surface of the cylindrical second guide bar 14 is fitted into a, and the slider 16 slides along the second guide bar 14. By doing so, the guide plate 8 can be moved up and down while maintaining a horizontal state.

The upper ends of the first ball screws 15 are slidably inserted into holes formed vertically in the left and right positions of the operation plate 6, and the lower ends are rotatably supported by the left and right positions of the end plate 9. Being second guide bar 1
4 and 14 are arranged in parallel. Each of the first ball screws 15 has an upper stopper 17.
Is screwed. The upper stopper 17 is formed with a half-split portion that contacts the approximately one-half arc surface of the second guide bar 14. When the first ball screw 15 is rotated by a motor (not shown), the half-split portion is The upper stopper 17 slides along the second guide bar 14.
Is screwed up and down along the first ball screw 15.
The upper stopper 17 can pass through the long holes 8a,... Formed in the guide plates 8,. Note that the first ball screw 15 is disposed outside the second guide bar 14 (however, the arrangement of the second guide bar 14 and the first ball screw 15 may be reversed). For this reason, the slider 16 slides on the inner half arcuate surface of the second guide bar 14 while the upper stopper 1
Reference numeral 7 denotes a slider which slides on the outer half arcuate surface of the second guide bar 14 and the slider 16 and the upper stopper 1.
7 do not interfere with each other.

As described above, the first guide bars 10, 10 and the second guide bars 14, 14 are inserted through the operation plate 6, the guide plates 8,... , Guide plate 8,
, And the end plate 9 can move up and down along the first guide bars 10, 10 and the second guide bars 14, 14 while maintaining a parallel relationship with each other. In addition, hanging bolts 18,... (Not shown on the right side in the figure) are respectively inserted through the operation plate 6, the guide plates 8,... And the end plate 9, and are provided at both ends of the hanging bolts 18,. By the engagement with the heads 18a,..., The maximum opening interval of the operation plate 6, the guide plates 8,.

A lower stopper 19 is provided between the base 2 and the end plate 9. Similarly to the operation plate 6, the lower stopper 19 has a pair of first guide bars 10, 10 inserted in left and right positions on the front side, and slides on the pair of guide rails 11, 11 in left and right positions on the rear side. By being freely attached, it is possible to move up and down while maintaining a horizontal state. More specifically, a pair of brackets 12, 12 are attached to the left and right positions of the front end surface of the lower stopper 19, and the first guide bar 10 is inserted through the brackets 12, 12, respectively. A pair of sliders 13, 13 is attached to the left and right positions of the end face, and the sliders 13, 13 slide on the guide rails 11, respectively.

A second ball screw 20 is provided behind the lower stopper 19. The lower stopper 19 is rotatably supported by the pair of columns 3, 3 (left and right positions of the apparatus frame 1) via brackets 21, 21 having upper ends fixed to the columns 3, 3, and a lower end thereof is a base. It is rotatably supported at the left and right positions on the rear side of the portion 2 and is disposed in parallel with the first guide bars 10. The lower stopper 19 is screwed to the pair of second ball screws 20 at the left and right positions on the rear side. More specifically, a pair of nuts 22 are attached to the left and right positions of the rear end surface of the lower stopper 19, and when the second ball screw 20 is rotated by a motor (not shown),
The front side of the lower stopper 19 is the first guide bar 1.
By sliding along 0,10 and the rear side screwing up and down along the second ball screws 20,20, it is possible to move up and down while maintaining a horizontal state.

In the operation mode of the pipe expanding apparatus having such a configuration, first, the second ball screw 20 is rotated in accordance with the height position of the work, and the lower stopper 19 is positioned at a desired position. Also, according to the height of the work,
Rotate the first ball screw 15 and move the upper stopper 1
7 is positioned at a desired position.

Next, the cylinder 5 is operated with the work set on the base 2. With the extension of the cylinder rod 5a, the operation plate 6, the guide plates 8,..., And the end plate 9 are lowered while maintaining a distance from each other. Thereafter, first, the end plate 9 abuts on the lower stopper 19 to restrict its lowering, and then the guide plates 8,... Sequentially contact the end plate 9 to restrict its lowering. During this time, the pipe expansion mandrel 7 is pressed into the pipe of the work and integrated with the radiation fin.

After that, the mandrel for pipe expansion 7,
Reaches the vicinity of the lower end of the work, the operating plate 6 comes into contact with the upper side stopper 17 and its lowering is regulated.
At this stage, the work is completed and this time the cylinder rod 5
is retracted, and the expanding mandrels 7,... are withdrawn from the work tube. The completed work is carried out from the base 2 along the carrying direction P.

Therefore, the pipe expansion device according to the present embodiment has the above-described configuration, that is, the operation plate 6, the end plate 9,
And first guide bars 10, 10, which are inserted through the lower stopper 19 and slide them up and down.
Are arranged on the front side of the operating plate 6, the end plate 9, and the lower stopper 19, and are screwed to the lower stopper 19, and the second ball screws 20, 20 for vertically screwing this Are arranged on the rear side of the lower stopper 19 (between the pair of columns 3 and 3 erected at the left and right positions on the rear side of the base 2), so that the first guide bars 10 and 10 and the column are supported. As a result, the distance between the work 3 and the work 3 can be increased (the left and right sides of the apparatus frame 1 are open), and the work transfer path P is straightened, that is, the work is carried in from the side of the pipe expanding apparatus, and from the opposite side. By realizing a method of unloading the work (a so-called center-through method), it is possible to increase the transfer efficiency, and at the same time, it is possible to construct a suitable production line.

The present invention is not limited to the above embodiment, and various design changes can be made without departing from the gist of the present invention. For example, the bracket 12 and the slider 13 may be formed integrally with the operation plate 6, the end plate 9, and the lower stopper 19, or may be formed separately.

The diameter, length, shape and quantity of the expansion mandrels 7,..., The quantity of guide plates 8,.
, The shape of the upper side stopper 17, the shape of the half bearing (slider) 16, and the like are not limited. Also,
The cross-sectional shapes of the first guide bar 10 and the second guide bar 14 are not limited to circular shapes.

[0029]

As described above, the pipe expansion device according to the present invention has the following features.
An operation plate, an end plate, and a first guide bar that is inserted into the lower stopper and slides them up and down are operated plate, end plate,
And a second ball screw, which is screwed to the lower stopper and screwed up and down, is arranged on the rear side of the lower stopper while being arranged on the front side of the lower stopper. As a result, the distance between the first guide bar and the column is increased, and a method of loading a workpiece from the side of the pipe expansion device and transporting the workpiece from the opposite side (a so-called center-through method) is realized. Efficiency can be increased, and a suitable production line can be constructed.

[Brief description of the drawings]

FIG. 1 is an external perspective view of a pipe expanding apparatus according to an embodiment of the present invention.

FIG. 2 shows an external perspective view of a conventional pipe expanding device.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Device frame, 2 ... Base part, 3 ... Post, 4 ... Ceiling part, 5 ... Cylinder, 5a ... Cylinder rod, 6 ... Operating plate, 7 ... Mandrel for pipe expansion, 8 ... Guide plate, 8a ... Slot, 9 end plate, 10 first guide bar, 11 guide rail, 12 bracket, 1
3 slider, 14 second guide bar, 15 first ball screw, 16 slider, 17 upper stopper, 18 hanging bolt, 18a head, 19 lower stopper, 20 second Ball screw, 21 ... Bracket, 22 ... Nut

Claims (2)

[Claims] 1. A base (2) and a ceiling (4) opposed to each other vertically, and a support (3, 3) for vertically connecting the rear sides of the base (2) and the ceiling (4). Cylinder rod (5) attached to the ceiling (4) of the device frame (1), and the base rod (2) and the ceiling (4), and a cylinder rod ( An operating plate (6) attached to 5a), and a guide plate (8,...) Arranged below the operating plate (6) and supported so as to be freely movable toward and away from the operating plate (6).
And an end plate (9) arranged at a position below the guide plate (8) and suspended from and supported on the guide plate (8), and arranged at a position below the end plate (9). In the tube expanding device provided with the lower stopper (19), the upper part is located above the base (2) so as to be located in front of the operating plate (6), the end plate (9), and the lower stopper (19). A first guide bar (10, 10) erected on the support plate (3, 3) so as to be located behind the operating plate (6), the end plate (9), and the lower stopper (19). The operating plate (6), the end plate (9), and the lower stopper (19) are configured to be slidable in the vertical direction by the guide rails (11, 11) fixed to the guide plate (8, 11). ...) and the actuating plate (6)
Are vertically slidable by second guide rails (14, 14) erected upward from the end plate (9) so that the guide plates (8,...) Are sequentially inserted through the end plates (9). The lower stopper (19) is vertically moved by a second ball screw (20) which is rotatably provided upright from the base (2) so as to be screwed to the rear side of the lower stopper (19). A tube expansion device characterized by being configured to be freely screwable. 2. A first ball screw (15) is provided so as to be rotatable upward from an end plate (9) so as to be inserted sequentially through the guide plate (8,...) And the operation plate (6). The ball screw (15) is passed through a guide plate (8,.
Upper stopper (17, 17) that can contact the back side of the
The pipe expansion device according to claim 1, further comprising: