US3365804A - Pipe gauging device - Google Patents

Description

B. G. FJELLSTRCM 3,365,804

PIPE GAUGING DEVICE Jan. 30, 1968 Filed April 26, 1965 2 Sheets-Sheet 1 INVENTOR 9 7 Hi6. FJEtLif/EJ! I BY New, wpfihw /j I 3 ATTORNEYS 1953 B. G. FJELLSTRGM 3,365,804

PIPE GAUGING DEVICE 4 6". FJELLST' M ATTORNEY;

INVENTOR United States Patent Ofiice 3,365,804 Patented Jan. 30, 1968 3,365,394 PIPE GAUGING DEVEQE Bengt Gottfrid Fjelisti'iim, Johanneshov, Sweden (Salti'mgsvagen 26, Nacka, Sweden) Filed Apr. 26, 1965, Ser. No. 456,757 Claims priority, application Sweden, Apr. 27, 1964, 5,203/64 2 filaims. (Cl. 33180} ABSTRACT OF lHn DISCLOSURE the pipe coincides with the geometrical main axis of the L tool. A hearing body lockable to the guide rail in various angle settings is provided with said bearing body rotatably mounted on the guide rail arranged for gauging the bending plane at the bend to be gauged. An angle gauging lever is arranged in a plane at right angles to the bearing body and arranged to gauge the bending angle for the bend to be gauged.

The present invention relates to a device for determining the appearance of a bent pipe. The invention is intended to be used in combination with a table into which data concerning the pipe has been recorded in the form of numerical information.

The pipe gauging device is primarily intended to be used for gauging pipes forming a space pattern, and forms a connection between two connecting points.

One embodiment of the invention is shown in the attached drawings, in which:

FIG. 1 is a perspective view of the tool.

FIG. 2 shows a guide-rail and slide-saddle constituting the rear section of the tool and on which a pipe is positioned in order to gauge the first straight portion of said pipe.

FIG. 3 is a perspective view of front section of the tool together with a pipe positioned so that the angle of the first bend can be gauged.

FIG. 4 is a perspective view of the tool together with a pipe and the first bend of said pipe secured on the slide during the gauging of the straight section of the pipe between the first and second bend and the difference between the bending plane of said bends and also the angle of the second bend.

FIG. 5 is a perspective view of the front section of the tool supplied with a pipe bending device.

FIG. 6 is a perspective view of a traveller positioned on the guide rail.

FIG. 7 shows as an example of a pipe-bending table compiled of numerical data.

FIG. 8 is a cross-sectional view taken upon section line a--a of FIG. 1.

In the drawings the reference numeral 1 indicates a frame member on which certain components are arranged. An attachment shoulder 2 serves as a means for clamping the tool when in use. The reference numeral 3 shows a slide-saddle, the upper part of which forms a fixing plane. A changeable plate 3' is positioned on said slide and secured to the same by means of pin 6. Also positioned on the slide 3 is a bracket 3" for a clamping piece 5. The slide-saddle 3 can run along a guide-rail 4 which constitutes a continuous guide and which is marked off with longitudinal measuring graduations. The reference numeral 4' indicates a strenigthener in the lower rear section of the rail 4. The function of clamping piece 5, which carries two guide plates 5 against which the pipe bends are to be secured, is to clamp the pipe against the plane upper section of the slide 3. A lever 7 is movably mounted on the clamping piece 5, which is in turn movably mounted at the bracket 3", the function of said lever 7 being to hold the clamping piece 5 pressed against the pipe. The lever 7 constitutes a spring and is locked fast under a projecting section on slide 3. The reference numeral 8 indicates a guide member, the function of which is to guide the pipe during the bending and gauging operation. The guide member 8 is changeably connected to the bearing body 15 by means of a track 15", which extends on the bearing body 15 and is locked fast by a shaft 8 through the pin 8 (as shown in FIGS. 1 and 8) which is pressed into the shaft 8' to become part of the shaft which also forms a securing point for a bending device 9. The guide member 8 can be rotated in the frame member 1 by means of the bearing body 15, which is graduated, and can be locked by friction to said frame member 1 by means of a locking screw 10 which is threaded on 15. The bearing body 15 is held in place by a guide plate 11. In the embodiment shown, the bending device 9 consists of a movable wheel and a lever, and can be dismantled from the guide member 8. The designation 12 indicates a traveller on which two locking screws 13 and 14 are positioned. The traveller 12, similarly to the slide 3, can run along the rail 4 and can also be locked fast to the same. The designation 16 shows a graduated disc intended for gang ing bends made in pipes, said disc 16 being displaceably secured on the track 15 on the bearing body 15. A lever 17 is rotatably mounted in the centre of the graduated disc 16, 17 shows a screw which is screwed tight on the lever 17 and locked by a spring 17". The screw 17' forms a stop bolt which, according to FIGS. 3 and 4, presses against the pipe for determining the angle of bend. The reference numeral 18 shows a dolly connected to the bearing member 15 by means of a screw 18', the function of the dolly 18 being to guide the pipe so that the pipe will lie close against the radius of guide 8 in order to get a correct measuring of the straight section, with larger dimensions (small ones can easily be controlled by hand), during the gauging operation, and also to absorb reaction forces while the pipe is being bent.

DESCRIPTION OF OPERATION The tool is clamped in a vice or the like with the attachment shoulder 2 positioned between the jaws. Gauging commences. (In this description it is assumed that gauging can be efiected without it being necessary to use the dolly 1s.

GAUGING THE FIRST STRAIGHT SECTION The clamping piece 5 is opened up so that the pipe can be placed in the tool. The pipe is positioned so that the first straight section lies along the rail 4 so that the straight section follows the head axis along the tool as shown in FIG. 2, and the first bend lies against the curved plate 5 on the clamping piece 5 and is locked against the plane on the slide 3 by the lever 7. The slide 3 is thereafter passed along the guide rail 4 until the end of the first straight section of the pipe is positioned in front of the first graduated disc line. The length is determined with the assistance of the graduations on the rail 4. The length of the first straight section is recorded in the first column of the table of pipe-bending data, see FIG. 7.

GAUGING THE FIRST BEND The clamping piece 5 is opened and the pipe removed from the tool. The bearing body 15 is locked in an arbitary rotation-plane. The pipe is then positioned in the gauge device with the first bend pressed tight against the guide member 8 so that an arbitrary portion of the first straight length reaches the slide 3, as shown in the FIG. 3. The clamping piece is closed down and the pipe locked fast against the plane upper section of the slide. The first bend is then gauged with the assistance of the lever 17, and the angle read off from the graduated disc. The angle of the first bend is thereafter recorded in the second column of said pipe-bending table, see FIG. 7.

GAUGING THE STRAIGHT SECTION BETWEEN THE FIRST AND SECOND BENDS The clamping piece 5 is opened and the pipe removed from the tool. The first, newly gauged, bend is placed on the plane upper section of the slide 3 with the straight portion betweenvthe first and second bends positioned in the longitudinal direction of the guide rail 4 so that the second bend can be laid against the guide member 8, as shown in FIG. 4. The first bend is positioned so that it lies against the curved plate 5 on the clamping piece 5.

We assume that the second bend lies in another plane in relation to the first.

The straight length between the first and second bends is adjusted by passing the slide 3 along the guide rail 4 until the second bend lies against the arcuate track in the guide member 8 (the bearing body is rotated until the correct bending plane is obtained with respect to the difference between the plane of the first and second bend, see FIG. 4), whereafter the bearing body 15 is locked fast to the frame 1 by the locking screw 10. The straight length between the first and second bends is read from the graduated rail 4 at the back of slide 3, and recorded in the third column of the pipe-bending table. The :angle diiference, between the plane of the first and second bend is read off from the graduated bearing body 15 and recording in the top half of the fourth column of said table.

The second bend is gauged and recorded in the bottom half of the fourth column of said table. Continued gauging of the pipe is carried out in the same way as described above.

The following components of the tool can be change in order to make possible the gauging of pipes of difierent sizes and radii:

The clamping piece 5, plate 3', guide member 8, lever 17, dolly '18 and the traveller 12.

It can be seen from the above that straight pipe can be bent in the gauging device, by using the bending device 9, and gauged at the same time. This method can be applied when, for example, bending prototype pipes or when bending pipes according to a plan or drawing.

By the straight length of the pipe is meant the length from the end of the pipe of the beginning of the radius of the first bend and the straight section between two bends,

4 USING THE TRAVELLER 12 The traveller 12, shown in the drawing, is used when the straight length projects beyond the graduations along the rail 4.

Subsequent to clamping the pipe in the slide 3, said slide is passed along the guide rail 4 until it reaches the extreme graduation line, whereafter the traveller 12 is placed sideways over the pipe with one end directly :over the first graduating line. The pipe is locked fast in the traveller 12 with the assistance of locking screw 13. The clamping piece 5 can now be opened up and the slide removed from the guide rail 4. The traveller 12 can be secured to the rail 4 by means of the locking screw 14 when the slide 3 is removed from said guide rail. Said traveller is then moved along the rail 4 carrying the pipe with it to the required length. If the straight length projects a distance more than twice the length of the graduations on the rail 4, a further traveler of the same type is used. With two such travellers 12 any straight length Whatever can be adjusted independent of its length.

What I claim is:

1. A gauging device for pipes provided with one or more bends lying in one or more bending plates, for establishing the difierent bending planes and angles of the bent pipe comprising a guide rail, a slide movable along said guide rail, securing means on said slide for securing a bent pipe to said slide at the bend immediately in front of the bend to be gauged so that the intermediate straight section of said pipe coincides with the longitudinal axis of said device, a bearing body, means for locking said hearing body to said guide rail at various angular settings, said bearing body being rotatably mounted on said guide rail to move around said longitudinal axis in a plane at right angles or the same to gauge the bending plane at the bend to be gauged, and an angle gauging lever mounted in a angles to the same to gauge the bending plane at the bend to be gauged, and an angle gauging lever mounted in a plane at right angles to said bearing body to gauge the References Cited I UNITED STATES PATENTS 2,832,152 4/1958 Blackshaw 33-180 2,973,581 3/1961 Rhodehamel 33174 3,038,261 6/1962 Blain 33180 3,060,587 10/1962 Picken 33174 3,245,201 4/1966 Richardson 33-180 SAMUEL S. MATTHEWS, Primary Examiner.

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