JPS5935829A - Manufacturing device of multi-line simultaneous spiral tube - Google Patents

Abstract

PURPOSE:To obtain a device which is capable of bending simultaneously and automatically a multi-line tube like a volution of a set curvaturs, by forming a feed roll and a bend roll of a tube to a multistep, and providing a device for controlling separately a rotating speed of the feed roll. CONSTITUTION:Tubes to be worked 1, 2 are inserted between a small diameter roll 8 of I and III of the first - the third two step type feed roll devices I -III, and a large diameter roll 18 of the device II, and also between a large diameter roll 9 of the devices I , III and a small diameter roll 19 of the device II, respectively. Subsequently, the rolls 8, 9 are rotated by driving devices 12, 13, the tubes 1, 2 are pinched and fed in by the roll 8 and 18, and 9 and 19, respectively. During that time, a feed quantity L of the tubes 1, 2 is measured by measuring instruments 34, 35 and is sent to a control device 50. Thereafter, bend rolls 24, 25 are advanced by a moving device 26 of a two step type bend roll device 20, and the tubes 1, 2 are bent. In this case, a moving extent Y of the rolls 24, 25 is measured, is sent to the device 50, in which relation of the quantities L and Y is compared with the condition derived experimentally, and a rotating speed of the rolls 8, 9 is controlled separately.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a manufacturing apparatus for simultaneously thinly wound multi-thread tubes, and more particularly to a manufacturing apparatus suitable for manufacturing thinly wound multi-thread tubes used for heat exchanger tubes and the like.

Conventional thinly wound tube manufacturing equipment has a single-stage feed roller and bending roller, so it is not possible to bend multiple tubes at the same time. Therefore, when constructing a multi-filament spirally wound tube, it is necessary to assemble tubes that have been bent one by one, and the precision between the tubes of the thinly wound tube after being assembled is reduced. Therefore, when applied to heat exchanger tubes of heat exchangers, etc., there was a drawback that sufficient performance could not be obtained.

An object of the present invention is to provide an apparatus for manufacturing a multi-thread simultaneously thinly wound tube that can simultaneously and automatically bend a multi-thread tube equally spaced on a concentric plane into a thinly wound shape having a set curvature. It is in.

The features of the present invention include a multi-stage feed roller whose rotational speed can be adjusted individually and feeds multiple tubes to be processed, and a roller that moves forward and backward relative to the tubes to be processed and simultaneously bends multiple tubes to be processed. With this configuration, it is necessary to install a multi-stage bending roller that can be processed, and a control device that individually controls the rotational speed of the multi-stage feeding roller with respect to the amount of movement of the multi-stage bending roller. The above objective was certainly achieved.

Hereinafter, the present invention will be explained based on sumi.

1 to 6 show an embodiment of the present invention in which two tubes to be processed are simultaneously bent into a thin spiral shape.

The apparatus for producing a multi-filament simultaneously thinly wound tube shown in these figures consists of a pedestal 3, a first . Second. Third two-stage feed roller device 1. I [, [Two-stage bending roller device 20, bending roller movement amount detection device 31, tube feed amount measurement devices 34, 35, controlling the rotation speed of the feed roller with respect to the movement amount of the bending roller A control device 50 is provided.

Said 1st. second and third two-stage feed roller devices I;
Among n and m, the 1st. third two-stage feed roller device I;
Of II and III, 1st. The third two-stage feeding roller devices I and III are installed at intervals on the tube to be processed 1 side, and the second two-stage feeding roller device The two-stage feed roller device 1.111 is installed at an approximately intermediate position.

Said 1st. Third two-stage feed roller device 1. IIr is
A hollow rotating shaft 7 supported on the frame 3 via a bearing 6, and a rotating shaft formed in such a length that both ends protrude from the rotating shaft 7 and are supported inside these via bearings 4 and 4'. 5
, a small-diameter feed roller 8 attached to the upper end of the rotating shaft 5 and feeding the tube 1 to be processed, and the rotating shaft 7
As shown in FIG. and a drive device 12.13 connected to the control device 50. The gears 10, 11 are individually connected to the drives 12, 13 via drive gears (not shown). and first and third two-stage feed roller devices I;
III, as the drive device 12 is driven, the gear 10
A small-diameter feed roller 8 is driven through the rotary shaft 5, and another drive device 13 is driven.
A large-diameter feed roller 9 is driven through the rotary shaft 7.

As shown in FIGS. 1 and 2, the second two-stage feed roller device (2) includes a hollow rotating shaft 17 provided on the pedestal 3 via a bearing 16, a bearing 14 inside the rotating shaft 17, 14
a rotary shaft 15 supported through the rotary shaft 17 with its upper end protruding from the rotary shaft 17; A third two-stage feed roller device I, a small diameter feed roller 8, and a tube 1 to be processed.
Large-diameter feed roller 18 and rotating shaft 17
A small-diameter feed roller 19 is attached to the upper end and feeds the tube to be processed 2 by sandwiching it between the large-diameter feed rollers 9 of the first and third two-stage feed roller devices I and III.
It has In this embodiment, the second two-stage feed roller device H is not provided with a driving gear and a driving device, but they may be provided if necessary.

As shown in FIG.
It is arranged in front of the two-stage feed roller device (2) and on the side of the tube to be processed 2. As shown in FIGS. 1 and 3, the two-stage bending roller device 20 includes a moving table 21, a hollow shaft 23 vertically provided on the moving table 21, and a hollow shaft 23 that is passed through the inside of the shaft 23. a shaft 22 provided on the moving table 21 and having an upper end protruding from the shaft 23; a large-diameter bending roller 24 attached to the upper end of the shaft 22 for bending the tube to be processed 1; and the shaft 23. A small-diameter bending roller 25 is attached to the upper end and bends the tube 2 to be processed.
4, 25 forward.

A moving device 26 for moving in the backward direction is provided.

As shown in FIG. 1, the moving device 26 is
Rotary drive source 27 and screw rod 28 connected to it
, a moving member 29 screw-fitted thereto, the moving member 29
By rotating the rotary drive source 27 in the forward direction, the bending rollers 24 and 25 are moved in the forward direction through the screw rod 28, the moving member 29, the rod 30, and the moving table 21. In other words, the tubes 1 and 2 to be processed are moved in the bending direction, and the rotational drive source 2
By rotating 7 in the opposite direction, screw rod 2
8. The bending rollers 24 and 25 are configured to be moved in the backward direction through the moving member 29, the rod 30, and the moving table 21.

In addition, as shown in FIG. 5, the rotational drive source 27 is
It is connected to the control device 50.

As shown in FIG. 1, the bending roller movement amount detection device 31 includes a contactor 32 that contacts the screw rod 28 of the bending roller movement device 26 and operates in proportion to the rotation speed of the screw rod 28; and a detector 33,
The actual measured value of the movement iY of the bending roller detected by these contacts 32 and the detector 33 is sent to the control device 50.

Feed amount dl11 of the tube to be processed 34°35
Of these, the feed amount measuring device 34 for the tube to be processed is installed corresponding to the tube to be processed 1, and the device 35 for measuring the feed amount for other tubes to be processed is installed to correspond to the tube to be processed 2.

As shown in FIGS. 1 and 4, the feeding amount measuring device 34 for one of the processed tubes is supported by a support plate 36 provided on the pedestal 3 via a bearing 38. The measuring device includes a rotating shaft 40, a sub-length roller 42 attached to one end of the rotating shaft 40 and in contact with the tube to be processed 1, and a length measuring device 44 provided at the other end of the rotating shaft 40. The long roller 42, rotating shaft 40, and length measuring device 44 work together to measure the feed amount of the tube to be processed 1, and send the measured value to the control device 50.

The feed rate measuring device 135 for the other tube to be processed is
As shown in FIG. 4, a support plate 37 is attached to the pedestal 3, a rotating shaft 41 is supported on the support plate 37 via a bearing 39, and a tube 2 to be processed is attached to one end of the rotating shaft 41. The length measuring roller 43, the length measuring device 45 provided at the other end of the rotating shaft 41, and the length measuring roller 43, the rotating shaft 41, and the length measuring device 45 cooperate. The amount of feed of the tube 2 to be processed is measured, and the measured value is sent to the control device 50.

As shown in FIG. 3, above the pedestal 3, a horizontal table 47 is installed via a support 46, and the tubes 1.2 to be processed on the horizontal table 47 are
A window 48 for taking out the processed spiral tube is formed immediately in front of the bending rollers 24 and 25 of the two-stage bending roller device 20 in the feeding direction. This window 4
At the position where 8 is formed, there is a window 48 from the end of the pedestal 3.
A tilting table 49 is attached over the front end of the table, and the thinly wound tubes 1/ and 2/ sent out from the bending rollers 24 and 25 are taken out from the window 48 along the tilting table (9) 49, and are transferred under their own weight to the horizontal table. 47.

As shown in FIG. 5, the control device 50 calculates the measured value of the bending roller movement amount Y detected by the bending roller movement amount detection device 31 and the measured value of the feed amount of each tube to be processed. Then, the relationship between the feed tL of the tube to be processed per unit time of processing and the amount of movement Y of the bending roller, and the springback of the thinly wound tube after bending are determined experimentally. The conditions for obtaining a thinly wound tube with multiple threads at intervals were compared with the relationship between the actually measured feeding amount of the tube to be processed 1.2 and the amount of movement Y of the bending roller 24°25, and based on the comparison results, the first ．． Drive device 12.13 of the third two-stage feed roller device I, I [I
are controlled separately, thereby controlling the rotational speeds of the feed rollers 8 and 9 separately, and as a result, it is possible to control the amount of feed of the workpiece tubes 1 and 2 with respect to the movement tY of the bending rollers 24 and 25. It is configured as follows.

In Fig. 1, Rt I R2 indicates the bending roller movement (1
0) Indicates the radius of curvature of the thinly wound tubes 1/ and 2/ determined by the relationship between the amount of movement Y and the feed rate of the tube to be processed and the springback of the bent spiral tube.

Also, Figure 6 shows the amount of movement Y of the bending roller with respect to the machining time.
An example of the conditions under which a thinly wound tube with equal intervals can be obtained by experimentally determining the relationship between the amount of feed and the feed amount of the tube to be processed and the springback of the thinly wound tube is shown below.

The manufacturing apparatus for the multi-filament simultaneously thinly wound tube of the above embodiment is as follows:
It works as follows.

First, as shown in FIGS. 1 and 2, 1. Third two-stage feed roller device 1. The tube to be processed 1 is inserted between the small-diameter feed roller 8 of I[I and the large-diameter feed roller 18 of the third two-stage feed roller device H, and Third
The tube to be processed 2 is inserted between the large-diameter feed rollers 9 of the two-stage feed roller devices I and III and the small-diameter feed roller 19 of the second two-stage feed roller device (2).

Next, the eleventh third two-stage feed roller device I.

(11) Drive the drive device t12.13 of m, gear 10°11
and the first through the rotating shafts 5 and 7. The third two-stage feed roller device I rotates the feed roller 8.9 of (2), and rotates the feed roller 8.9 of the first.
Third two-stage feed roller device I.

The tube to be processed 1 is sandwiched between the small-diameter feed roller 8 of (2) and the large-diameter feed roller 18 of the second two-stage feed roller device H, and is fed. The tube to be processed 2 is sandwiched between the large-diameter feed rollers 9 of the third two-stage feed roller devices I and III and the small-diameter feed roller 19 of the second two-stage feed roller device (2) and is fed.

During this time, the feed amount of the tube to be processed 1 is measured by the cooperation of the length measuring roller 42, the rotary shaft 4o, and the length measuring device 44 of the feed amount measuring device 34, and the actual measurement value is sent to the control device 50. The feed amount of the tube to be processed 2 is determined by the feed amount measuring device 35.
The length measuring roller 43, the rotary shaft 41, and the length measuring device 45 cooperate to measure the distance, and the actual measured value is sent to the control device 5o.

After feeding the tube to be processed 1.2, when the driving source 27 of the two-stage bending roller device 2o is rotated (12), the screw rod 28 and the moving member 29 of the moving device 26 are rotated (12). The bending rollers 24 and 25 are operated forward through the screw action of the rod 30 and the moving table 21, and the large diameter bending roller 24 bends the processed tube l, and the small diameter bending roller 25 bends the processed tube 2. It is bent.

Simultaneously with the operation of the moving device 26 of the two-stage bending roller device 20, the contactor 32 of the bending roller movement amount detection device 31 is activated.
The amount of movement Y of the bending rollers 24 and 25 is measured by the cooperation of the detector 33 and the detector 33, and the actual measured value is sent to the control device 50.

The control device 50 inputs the measured value of the feed rate of the tubes 1 and 2 to be processed and the measured value of the amount of movement Y of the bending roller 24. The relationship between the amount of feed and the amount of movement Y of the bending roller, the springback of the tube to be processed, and the conditions for obtaining a equally spaced spirally wound tube, which has been determined experimentally, and the actually measured tube to be processed. Feeding amount L for 1 and 2
(13) and the movement amount Y of the bending roller 24.25, and based on the comparison results, the actually measured bending roller 2
4 and 25, in order to control the feed rate of the tube to be processed. Third two-stage feed roller device 1.
The third drive devices 12 and 13 are controlled separately, and the rotational speeds of the feed rollers 8 and 9 are controlled separately.

As a result, the curvature Rt having equal intervals and set,
The spirally wound tube 1' is bent and processed into spirally wound tubes 1' and 2' of Rv.

2' is pulled out along the inclined table 49 through the window 48 formed in the horizontal table 47, and the horizontal table 47 is pulled out by its own weight.
Move on top.

Next, the moving device for the two-stage bending roller device 2o -2
6 is operated in the backward direction, and the moving device 26 and the rod 30
The bending rollers 24 and 25 are operated backward through the movable table 21 and the tubes 1 and 2 to be processed are continuously fed in during this period.

When the feed rate of the tubes 1 and 2 to be processed is controlled in the relationship shown in FIG. 5 with respect to the amount of movement Y of the bending rollers 8 and 9, In other words, after the bending rollers 8 and 9 move forward, the curvatures R1 and R2 are bent from a large curvature to a small curvature in a circular winding until the bending point where they are moved back, and after the bending point, the bending is performed from a small curvature to a large curvature in a circular winding. As a result, the two-layer, two-stage, thin-wound tubes 1/ and 2/, in which the thin-wound portion from the large curvature to the small curvature and the thin-wound portion from the small curvature to the large curvature are continuous and equally spaced from each other, are simultaneously made. can be manufactured.

Note that the present invention is not limited to an apparatus for producing thinly wound tubes with two threads, but can also be applied to an apparatus for producing thinly wound tubes with three or more threads.

As explained above, according to the present invention, a plurality of tubes to be processed are fed by a multistage feed roller with variable rotational speed, and then a plurality of tubes to be processed are simultaneously bent by a multistage bending roller. The amount of feed of the tube to be processed is controlled by controlling the rotational speed of the multistage feed roller using the control device in relation to the amount of movement of the bending roller. ) Thinly wound tubes having equal spacing between each other can be manufactured at the same time, and the performance of equipment using such thinly wound tubes can be improved.

[Brief explanation of the drawing]

1 to 6 show an embodiment of the present invention,
Figure 1 is a plan view with the horizontal table removed, Figure 2
Figures r, Figures 3 and 4 are taken from lines AA' and B- in Figure 1.
5 is a block diagram showing a control device and connecting members to the control device; FIG. 6 is a sectional view taken along line B' and line c-c' and viewed in the direction of the arrow; FIG. 6 is a diagram showing the bending roller versus machining time. 3 is a graph showing the relationship between the amount of movement of the tube and the amount of feed of the tube to be processed. 1.2...Tube to be processed, r, n, m...1st.
Second and third two-stage feed roller devices, 8.9...first
゜Feed roller of third two-stage feed roller device, 12゜1
3... Drive device, 18. 19... Feed roller of second two-stage feeding roller device, 20... Two-stage bending roller device, 21... Moving table of two-stage bending roller. , (16
) 24.25... The same bending roller, 26... The same moving device, 31... The moving amount detection device of the bending roller, 34.35
... Feeding amount measuring device of the processed tube, 50... Control device 1/, 2/... Processed spiral-wound tube, L... Feeding amount of the processed tube, Y... Bending roller Amount of movement, R1* R2...Curvature of the spiral tube. (17) 6th figure force Loe arc call fqT(:sk) Figure 5

Claims (1)

[Scope of Claims] 10 A multi-stage feed roller whose rotational speed can be adjusted individually and feeds a plurality of tubes to be processed, and a roller that moves forward and backward relative to the tubes to be processed and simultaneously feeds a plurality of tubes to be processed. A multi-strip simultaneous sheet comprising: a multi-stage bending roller that can perform bending; and a control device that individually controls the rotational speed of the multi-stage feed roller with respect to the amount of movement of the multi-stage bending roller. Rolled tube manufacturing equipment. 2. The control device receives an actual measurement value of the amount of movement of the multistage bending roller and an actual measurement value of the feed amount of the processed tube according to the rotational speed of each roller of the multistage feed roller, and compares the two actual measurements. , the multi-strip simultaneous sheet according to claim 1 is configured to be able to control the rotational speed of the multi-stage feed roller with respect to the amount of movement of the multi-stage bending roller based on the comparison result. Rolled tube manufacturing equipment.