DE2147079A1 - Method and device for attaching helically extending ribs or the like to elongated objects - Google Patents

Description

2H7079

G 47 919

Mr. DOUGLAS CNORRIS, 6 Savilles Close, Eaton Socon , Huntingdonshire (England)

Method and device for attaching helically extending ribs od. The like. On elongated Objects

The invention relates to a method for winding continuous ribs on shafts, tubes or other elongated objects, these ribs, webs or the like being wound in a helical manner should be. The invention also relates to a device for carrying out the reading method and Tubes carrying helically wound ribs produced by this method.

The winding of continuous ribs, webs or the like onto thin-walled tubes presents certain problems if you want to mass-produce such pipes. These problems are intensified when the tubes have a non-circular cross-section.

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The object of the invention is to wind up and attach continuous ribs, webs or the like on pipes, shafts, axles or other elongated objects regardless of to simplify their cross-sectional shape so that mass production is possible without difficulty.

To solve this problem, in a method for winding and attaching ribs, webs or the like on pipes or other elongated objects suggested that a frame first tube or a first shaft supported and a second tube or a second shaft with this first Pipe or this first shaft is brought into alignment, whereupon the pipes or shafts rotated and a rib or a ridge on the first pipe or the first wave and then on the next pipe or the next wave is wound and this web is welded to the tubes or shafts where they meet, whereupon the wound rib or the wound web is divided in the area of the weld, to separate the tubes or shafts from each other.

Furthermore, according to the invention, a device for diiching this method is proposed which has a frame on which a pipe or a shaft can be rotatably supported, one in the longitudinal direction of the pipe or the shaft movable carriage or carriage with a tape guide for the material of the to be wound up ribs, webs or the like. Is provided and is preferably on this carriage or slide

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Means for fixing the by the combined action of the sliding movements of the carriage or Carriage and the rotary movements of the tube or the shaft or other rods attached ribs or Bars are attached to the workpiece and are also preferably located on this carriage or slide Facilities for dividing or cutting the finished rib or the finished web are located.

A thin-walled tube produced according to the invention is characterized in that it is helical circumferential rib or a corresponding web od. The like. Which in this tube by notch effect Od. Like. Is used and only welded to the ends of the tube with the same.

In the drawing is.ein embodiment of the Invention shown, namely shows

Fig. 1 is a side view of a device with which ribs, webs or the like. On tubes with can wind up oval cross-section,

FIG. 2 shows a cross section along line 2- 2 through the device from FIG. 1,

Fig. 3 is a perspective view of the tape guide attached to the support carriage for Winding ribs, webs or the like onto tubes with an oval cross-section,

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FIGS. 4 to 8 show the od of the device from FIG. 1 during the winding up of ribs. The like. On tubes steps carried out with oval, circular or other cross-section and

Fig. 9 to 1i schematic end views from which

Movements of the illustrated in Fig. 3

w Tape guide when winding ribs,

Webs or the like. can be seen on a tube with an oval cross-section.

The invention is described below with reference to a device for attaching helical ribs to pipes described with an oval cross-section. However, it should be noted that it is for those skilled in the art without It is also possible to make the necessary modifications in order to also use the device for pipes, their Cross-section is circular or non-circular, but has no sharp edges, with helical ones To provide ribs or webs, as well as full waves.

According to FIGS. 1 and 2, the device designed as a machine has a bed 1 with a fixed headstock 2 on which two drive motors are attached, namely a slow-running motor 3 and a high-speed motor 4. A lead screw 5 extends over the length of the bed 1, which serves to move a support slide, which carries the tools or devices intended for attaching the ribs or webs, along the bed 1 away from the headstock 2. The support slide 8 runs on roller bearings 7 and is secured against lifting from the bed 1 by one or more transverse

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bars 71 secured. The support carriage 8 is with With the aid of a pneumatic cylinder 72 at high speed to its starting position near the headstock 2 withdrawn. The pneumatic cylinder is located on one behind the headstock 2 Extension 10 of the bed 1 mounted, and has a piston rod 73, which is attached to the cross bar 71 of the support slide 8 is attached. The extension 10 has guides for a wheeled one Trestle 11, which with the help of a hydraulic cylinder 12 housed in bed 1 along the extension is movable. At the end of the bed 1 opposite the headstock 2 is a further extension 13 attached, on which a tailstock 14 is located, the position of which can be adjusted over the length of the extension 13 is.

A spindle 15 extends through the headstock 2, its end located in the area of the headstock is supported by a pillow block bearing 16 located on the mobile stand 11. When the spindle 15 is in the position shown in Fig. 1, i.e. when the mobile block 11 is close to the headstock 2, the other end of the spindle 15 is supported by an intermediate support 17 or a similar fixed bearing supported.

A drive spindle 110 located inside the spindle piece 2 carries a worm wheel 111, which is driven by a worm 113 which is mounted on it

meets

meets a shaft that also has two pinions 112 /. treaes of these two pinions is via a chain drive or

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a belt drive driven by one of the two motors 3 and 4. Each engine includes a clutch, like that that the shaft can be driven either by the desired motor. The drive spindle 110 is tubular and the spindle 15 is passed through this drive spindle and is driven by the same via a suitable connection such as a dog clutch, which are engaged can when the spindle 15 is in its front position. As drive elements, however, can also Parts located on the drive spindle 110 or other mechanical rigid drivers may be provided, which transmit a drive to the spindle 15 in each axial position thereof.

The lead screw 5 is driven by the spindle 15 via a gear and coupling unit 6, the translation of which can be changed as a function of the respectively desired pitch of the helical ribs or webs to be wound. Unless the spindle has a non-circular cross-section, devices such as a wedge or a spring are provided in order to transfer the drive in a form-fitting manner to a tube seated on the spindle in order to avoid slippage. If, as in the case discussed here, the tube has an oval cross-section, a spindle 15 with a corresponding cross-section is used, with no auxiliary device being required for transmitting the drive. Although a spindle 15 is important for thin-walled tubes that can be compressed when winding ribs, webs or the like , this spindle can be used when winding ribs or

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Bars on thick-walled tubes or full corrugations are omitted if other support devices are provided for these workpieces.

By moving the block 11 seen in Fig. 1 to the left, the spindle 15 is withdrawn so that you right end moves back into the spindle head 18 of the headstock 2. This creates an on the Spindle 15 inserted tube T1 released and can be done by hand or by an automatic device removed.

The tailstock 14 carries a pneumatic cylinder 19, the piston rod of which is attached to a support head 20 Holding one end of the tubes connected, this support head 20 is longitudinally of the bed slidable on rods 201. It carries a rotatable abutment 202 which engages in a second tube T2, which is arranged in axial alignment with the tube T1. There are two supports 203 are provided which support the tube T2 before it has been gripped by the abutment 202. These supports 203 had the tube T2 slightly below the working plane shown in FIG.

From one not shown in the drawing, but attached as seen in Fig. 2 on the left side A metal band S is fed to a roll of a band guide 21, which sits on the support carriage 8. This With the aid of the band guide 21, the metal band S is helically onto the tube T1 on the spindle 15 by the combined effect of the rotation of the spindle 15 and the sliding movement of the tape guide 21

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- 8 carrying support carriage 8 wound up.

From Fig. 2 and 3 it can be seen that the support carriage 8 has a main body 81 on which a socket housing 82 is rigidly attached. This housing 82 contains a cylindrical opening 83 » in which a cylindrical bushing 84 is rotatably inserted on suitable bearings. This socket 84 has an opening 85, the cross section of which corresponds to the cross section of the having a helical rib or a helical Steg to be provided corresponds to tube T1. In Fig. 2 and 3 seen in front of the housing 82 are guides 86 arranged for a carriage 87 carrying the tape guide 21, the carriage 87 between the Guides 86 can be moved horizontally and vertically. The tape guide 21 is on the top of the carriage 87 so that it can be pivoted about a vertical axis.

The main body 81 of the support carriage 8 has horizontal guide surfaces that are perpendicular to Extend the axis of the spindle 15 and serve to guide a displaceable cross slide 91. This Cross slide 91 has a frame 92 »on the one pneumatic cylinder 93 is articulated. The piston rod of this cylinder 93 has on its outer End of a thread and is screwed with the same in a cardan stone 94, which between the in the distance First arms 95 attached to one another and suspended from the frame 92 so as to be pivotable about a pivot pin 96 Angle lever is articulated. The second arms 96 of this angle lever are efcier with the help

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Connecting strap 98 connected to the rear end of the movable jaw 99 of a scissors 100, whose fixed jaw 101 can also be seen. The movable jaw 99 of the tin snips 100 is mounted between two upstanding struts 102, which are connected to one another at their upper ends, to form a support for a guide 3, the guide surface of which is at an angle of 45 ° to the horizontal runs inclined and which lies in a vertical plane which extends in the longitudinal direction of the bed 1 A pneumatic cylinder 108 is connected to the guide 103 and operates to be a welding torch 104 can move back and forth a short distance, such as 1.87 cm (3/4 inch). A protective plate shown in the drawing covers the welding torch 104. The welding torch 104 is equipped with a sensor 109 which, when the welding torch is in operation, the connection touches between the wound rib and the tube and controls the location of the welding electrodes.

Another cylinder 105 is provided to move the cross slide 91 back and forth. At the bed two end blades 106 and 107 are attached, which are of a finger 80 protruding from the main body 81 of the support slide 8 can be actuated.

For the automatic control of the device, a control 9 is provided, which is responsive to the actuation of the

from ° °

various limit switches and / other common controls responds to operate the device in the manner described below. Since the Training and operation of the control not part

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of this invention, it has not been shown and described in detail.

Way of working

The operation of the device will first be explained in connection with Figs.

First, a first tube T1 is placed on the spindle 15 in such a way that its one end is close to the spindle head 18 and its other end is just in front of the intermediate support 17. A second tube T2 extends through the intermediate support 17, both ends of which are supported by the support head 20 and the outer end of the spindle 15. A metal strip S was fed cold through the strip guide 21 and welded to the end of the tube T1 facing the spindle head 18 before the work process begins.

In order to complete the attachment of the rib or the web to the tube T1, the motor 4 is switched on, whereby the spindle 15 and the lead screw 5 rotate. The support slide 8 is moved by the lead screw 5 along the pipe T1 which, due to its rotation, pulls metal band S through the band guide 21, whereby the helical web F shown in FIG. 4 is formed on the pipe T1. The tape guide 21 prevents wrinkles or waves from forming on the wound metal tape, and ensures that the metal tape S with the correct -11-

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Slope is wound on the tube T1. The web F is over most of the length of the tube T1 in no way connected to it, but is only kept in its desired position by that due to the tensile stress exerted on the metal band S in the band guide 21, it easily falls into the Metal of the pipe is pressed in, whereby a notch can form in the surface of the pipe.

Immediately before the support carriage 8 reaches the connection point between the two pipes T1 and T2, the finger 80 comes into contact with the limit switch 106 and closes the same. The control 9 responds to this closing of the limit switch 106 and puts the cylinder 105 under pressure, whereby the cross slide 91 is moved in the direction of the pipe and the metal shears 100 and the welding torch 104 assume the position shown in FIG. The tin snips embrace the web F, but remains open, while the electrode of the welding torch 104 in one through the axis of the spindle 15 and thus of the pipe through vertical plane. The pneumatic cylinder 108 is then pressurized is set and moves the welding torch 104 along the dash-dotted line to be seen in FIG. 6 90 forward, so that the welding electrode reaches the position 104a shown in dashed lines. At the same time, the drive is switched from motor 4 to motor 3, so that the spindle 15 with is rotated at a slower speed that is suitable for the welding process to be carried out. the The mode of operation of the welding torch is timed or programmed so that the web F to the one another butting ends of both tubes T1 and T2 with

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is welded to a single weld. The sensor 109 acts with the connection between the The tube and the bar come together and the welding torch follows the movements made by the probe.

Then the second limit switch 107 is actuated and the drive to .Spindel 15 and the lead screw "5 separated and at the same time the pneumatic cylinder

93 is pressurized to set the tin snips into operation, as shown in FIG. 7. This operation is timed so that the S1qg F is separated at the point of contact between two consecutive pipes. The welding torch The load-bearing slide and the cross slide are then moved back.

The attachment of a helical web or a corresponding rib on the tube T1 is now complete and the control 9 actuates the cylinder 12 in such a way that the spindle 15 can be withdrawn and the tube T1 can be removed. Then the cylinder 12 moves the spindle 15 forward again, which moves into the end of the tube T2 which was supported by the intermediate support 17. The support slide 8 then returns to its starting position and thereby takes the tube T2 with it, which is pushed completely onto the spindle 15 by the support slide 8. The support head 20 is then withdrawn and another tube T 3 is placed on the support 203 between the intermediate support 17 and the support head 20. Then the support head 20 is advanced in order to lift the new pipe from the supports 203 , which thereby becomes in position

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- 13 is brought, which previously occupied the tube T2.

The situation is again as already described, with the tube T2 assuming the position that initially the tube T1 had occupied, and the web P already welded to the front end of the tube T2 is. The control then switches back to the fast-running one Motor 4 on, creating a new operation for attaching a helical web od. The like. Begins on tube T2. If the weld seam between the web F on the one hand and the tubes T2 and T3, on the other hand, has been completed, the web F is cut off again and the tube T2 is' done.

During the winding process, the tape guide 21 'dl · function, the metal tape S when it is bent to steer and ensure that the same runs on the pipe with the correct slope. Such a one Monitoring and control of the metal belt is particularly important when the metal belt, for example is bent around the end radii of a tube which is oval in cross section. As can be seen from Fig. 3, the tape guide 21 consists of a block with a base plate 22 and a head piece 23. From the base plate 22 extends to the head piece 23 a curved surface 24 which has practically the same curvature as the part of the pipe with the smaller diameter has. Ain runs approximately diagonally over the surface 24 Fünrungsechlitz 25 »of the metal band S for the Winding process determines the distance to be covered.

According to a practical embodiment, the device can be so drawn out BdLn ₁ that ui> 3 on a drill with

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oval cross-section with terminal radii or radii of curvature of about 1.27 cm (0.5 inches) a metal band S about 0.127 cm (0.05 ") thick and about 1.87 cm (0.75") wide.

The winding steps shown in FIGS. 9 to 12 show that the spindle 15 rotates and the metal strip S is cold-drawn from the reel or reel through the guide slot, the guide slot

25 holds the metal band S firmly on the tube and controls the same so that a wrinkling or a Throwing the same is prevented. In particular, such monitoring takes place both in the bending zone

26 as well as in a straightening zone 27 instead of * The Guide block is made with the help of pneumatic or hydraulic cylinders or with the help of mechanical Devices such as springs or loading weights are pressed against the spindle 15. These funds are in Fig. 8 indicated schematically, where it is shown that the piston rods 29 and 30 are pneumatic cylinders 290 or 300 act against the slide 87 'on which the tape guide 21 is attached.

When the spindle 15 is rotated, the guide block moves vertically and horizontally to ensure that that at least the bending zone 26 and the straightening zone 27 of the guide slot 25 always be kept close to or in contact with the pipe. In addition, the tape guide rotates forming guide block around its vertical axis, so that the slope of the web F corresponds to the radius de3 pipe is monitored at the moment of winding. After according to an end radius R1 in the in Fig.

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10 and 10, the web F has been wound up, the metal strip S becomes straight around one or after a large radius R2 section laid, with a precise control and guidance of the metal band during this part of the Winding process is not absolutely necessary. As shown in FIG. 12, the metal band S is between the bending zone 26 and the straightening zone 27 partially lifted out of the guide slot 25.

After the method step shown in FIG is completed, the tape guide 21 moves downward and to the left with simultaneous precise control during the bending process, which is now starting again, until the position shown in FIG. 9 is reached again is. Depending on the difference between the largest and smallest dimensions of the pipe, be the same i »Cross-section oval, elliptical or rectangular or square with rounded corners or uniformly or unevenly polygonal, it is possible, taking into account the height of the web F, in certain cases to lock the carriage 87 in one position in the guides 86 and also the tape guide 21 to set in a position on the top of the carriage 87, so that facilities for Locking or locking these parts in these particular positions to each other is provided, however are not shown in the drawing.

The guide block forming the tape guide is only shown schematically, i.e. its real execution

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form is generally somewhat different and is chosen to adequately account for all possible circumstances can be. The optimal shape and training and also the depth of the guide slot must can be determined experimentally at many points of the same.

In order to have the effect of hitting the tube when rotating it into the position shown in FIG reduce, it may be useful to cut back the base plate 22 somewhat, as indicated by the dashed line Line 28 in FIG. 9 is indicated. On the other hand, it is also possible to have the tape guide in the form of a ring to form, which completely surrounds the tube, so that during the working step shown in FIG the mold is supported on the spindle against the load exerted on the web. A controller and Monitoring in the straightening zone can then be carried out using a separate guide from the main guide additional leadership can be achieved. Guides having other shapes may prove to be suitable or turn out to be desirable according to the operating conditions occurring in each case.

In another embodiment, not shown, the straightening zone is formed by a pair of rollers which may consist of conical rollers which are always kept in the immediate vicinity of the pipe surface by a mechanism. It is also possible, or instead of these conical rollers, to use additional rollers in order to achieve control in the bending zone. With another machine

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Construction is possible instead of taking precautions Move the guide block to provide the spindle Suspend swinging in order to maintain the desired position of the guide in relation to the spindle.

It is obvious that there are numerous variations of the described embodiment are possible, for example by parts of the guide block replaced by movable fingers or rollers. The Fora of the guide block can also be changed and the The width of the guide slot can be changed. The form, training and actual mode of operation The guidance is therefore not critical to the present invention, the most important feature of which is that the supplied metal strip is guided over a larger part of its length when being wound onto the tube is that wrinkling, curling, bending or other undesirable deformations are prevented.

In the above description it was assumed that the one with a helically circumferential Sttf to provide * -. · Tube a non-circular Has cross section. Attaching such a web to pipes with a circular cross-section is important It is much easier to carry out because the tape guide or the guide block can be replaced by a stationary block that is screwed to the housing 82, this block being the Can surround tube and contains a channel or slot for receiving the metal strip to be wound.

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^ r; v ,,, ^ * ■ ■ * -. ORIGINAL INSPECTED

Numerous modifications are possible within the scope of the above invention. For example an automatic device for loading the device with new workpieces and removing the finished workpieces are provided so that the device works fully automatically. Also be pointed out that the device, although it is mainly intended for attaching helically circumferential webs on pipes, also consisting of solid material shafts with circumferential webs or Can provide ribs, for which it is only necessary, the holder for these shafts or other to modify elongated objects.

Claims ι

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Claims (12)

Patent claims: 1.) Method for attaching helically running continuous ribs, webs or the like on elongated objects such as pipes, marked thereby net that at least two of these elongated objects (T) in axial alignment to each other and at their ends butting rotated / and thereby a rib or a web (F), which at the front end of the first object has been welded, except for the front end of the abutting one next object is continuously wound in a helical manner, whereupon the wound rib or the wound web on two successive objects welded firmly in the contact area of the same and then the web between the successive ones Objects, whereupon the finished first object is removed and the rib or web then on the second object except for the front end of another corresponding one Object wound up and then again in the contact area of the two abutting Objects is welded and cut off. 2.) The method according to claim 1, characterized in that the first object (T1) according to removed from completion and the next -2- 209813/1194 2U7079 Item (T2) from the for the supply of the Rib or the web guide (21) used in the finished first workpiece originally occupied position is driven, whereupon one another object (T3) brings it into axial alignment with the second object (T2) being advanced, 3.) Method according to claim 1 or 2, characterized in that the rotational speed of the objects (T) less during the welding process than during the winding process is. 4.) Method according to one of claims 1 to 3, characterized in that when winding or winding a rib or a web (F) on objects with a non-circular shape Cross-section through creasing or warping of the tape to be wound (S) a guide whose surface is in contact or close to the surface of the work piece is held, is prevented. 5.) An apparatus for performing the method according to one of claims 1 to 4, characterized in that it comprises a frame (1) elongated for rotatably supporting objects, such as tubes (T), a slidable along these objects carriage (8), a tape guide ( 21) on this slide, devices (104) for fastening a rib or a web (F) on the elongated -V 209813/1194 Objects, which by the combined effect of the rotation of the objects and the Longitudinal movement of the carriage is wound on the objects and facilities (100) for cutting off the web (F). 6.) Device according to claim 5, characterized in that the slide (8) has a cross slide (91) which has tin snips (100) and a guide (103) for a welding torch (104) carries, and that the cross slide (91) in the direction of the objects or Workpieces (T) can be advanced into a position in which the welding electrode in a vertical plane, which is close to or in the vertical plane, in which is also the axis of the workpiece, whereby the jaws (99,101) of the tin snips (100) lie on both sides of the web (F). 7.) Device according to part 5 or 6, characterized in that the welding torch (104) can be moved along a path (90) from the rest position to the operating position and back is inclined at an angle of about 45 ° to the horizontal, preferably a sensor (109) is provided which controls the movements of the welding torch when it is in its operating position. - 4 -209813/1194 8.) Device according to one of claims 5 to 7, characterized in that supports (117,20) are provided to hold a second helically or tubular workpiece (T2) _% in axial alignment with the first workpiece (T1), the carriage (8) being movable in such a way that it winds the web (F) from the end of the first workpiece (T1) to the beginning of the second workpiece (T2) and the welding torch (104) then winds the web on these two abutting ends of the Workpieces are welded on, whereupon the metal shears (100) cut the web (F) at the point where the two workpieces meet. 9.) VonLchtung according to one of claims 5 to S, characterized in that for the application of continuous helical webs tubular workpieces (T) a spindle (15) to support one of these workpieces (T1) is provided that can be withdrawn to release this workpiece, the Carriage (8) can be moved so that he the next tubular workpiece (T2) in prefers the position originally occupied by the first tubular workpiece (T1), and wherein a support head (20) is provided, which can be moved back and forth to a next tubular workpiece (T3) in axial alignment with the first workpiece (T1 or T2). -5- 209813/1 194 2H7079 10.) Device according to one of claims 5 "to 9, characterized in that for winding from ribs or webs (F) to tubes (T) with oval or other non-circular Cross-section without sharp edges, the tape guide (21) has a guide surface, which the tape to be wound (S) in a bending zone (26) and a straightening zone (27) controls, with this tape guide (21) pressed resiliently against the workpiece and against it: Force can be moved so that it matches the movements of the surface of the non-circular Rohres can follow. 11.) Device according to claim 10, characterized in that that the tape guide (21) has a guide block with such a shaped surface (24) that it is on the tubular workpiece (T) can come to rest and the zones of the smallest radii of this Workpiece tightly encompassed, with a guide slot (25) for the strip material to be fed in approximately diagonally across this surface (24) (S) extends and wherein a bearing is provided which allows that the guide block can be moved in the plane perpendicular to the workpiece axis and can be pivoted about an axis lying in this plane ver. -6- 209813/1 2H7079 12.) With a continuous helical web or a rib provided elongated, for example tubular workpiece, which after the method of any one of claims 1 to 4, characterized in that the web (F) into the side wall of the tube (T) by notch effect or the like. Pressed and only is welded to the same at both ends of the workpiece. 2098 13/1194