CN111702052B

CN111702052B - Device for marking starting bending point and stopping bending point of bent pipe and using method

Info

Publication number: CN111702052B
Application number: CN202010429043.7A
Authority: CN
Inventors: 刘联红; 卢建兵; 吴志江; 张其海
Original assignee: Guangzhou Wenchong Shipyard Co Ltd
Current assignee: Guangzhou Wenchong Shipyard Co Ltd
Priority date: 2020-05-20
Filing date: 2020-05-20
Publication date: 2022-05-13
Anticipated expiration: 2040-05-20
Also published as: CN111702052A

Abstract

The invention relates to the technical field of bent pipes, and discloses a device for marking a bending start point and a bending stop point of a bent pipe and a using method thereof, wherein the device is used for marking the bending start point and/or the bending stop point on the bent pipe positioned in a pipe bending die during pipe bending, the outer diameter of a bolt gasket on the pipe bending die is set to be D, the device comprises a positioning assembly and a marking piece for marking the bending start point on the bent pipe, the positioning assembly comprises a transverse plate and a vertical plate, the transverse plate is vertically connected with the vertical plate, the marking piece is fixedly connected to one end of the transverse plate, and the horizontal distance between one side of the vertical plate close to the marking piece and the marking piece is set to be a, and then a is D/2. The device for marking the starting bending point and the stopping bending point of the bent pipe and the using method can quickly and accurately realize positioning and marking the starting bending point and the stopping bending point.

Description

Device for marking starting bending point and stopping bending point of bent pipe and using method

Technical Field

The invention relates to the technical field of bent pipes, in particular to a device for marking a bending start point and a bending stop point of a bent pipe and a using method thereof.

Background

After the pipe is bent, the bending angle of the pipe is changed under the action of self-rebounding extension, and the overall length of the pipe is increased. If the pipe needs to be welded and then bent or a production mode without allowance blanking is adopted, the bent pipe needs to be compensated, a theoretical bent pipe program generated by design and the blanking length are corrected through bending test and measurement accumulation correction parameters, and a starting bending point and a stopping bending point need to be marked on the pipe in the process.

However, in actual operation, it is often difficult for a worker to accurately determine and position the start bending point and the stop bending point of the bent pipe. At present, a worker uses an angle ruler to find a bending starting point and a bending stopping point through calculation according to the bending angle and the pipe length of a pipe, the method needs to read the angle and the length, and the positioning accuracy of the bending starting point and the bending stopping point is not high and the speed is low. There is a lack of a tool that can quickly locate and mark the kick-off and stop points.

Disclosure of Invention

The purpose of the invention is: the utility model provides a device and method of use for mark the start of turn point and the end of turn point of return bend, it can realize location and mark start of turn point and end of turn point with quick accuracy.

In order to achieve the above object, the present invention provides a device for marking a start bending point and a stop bending point of a bent pipe, which is used for marking the start bending point and/or the stop bending point on the bent pipe located in a bent pipe mold when the bent pipe is bent, and the outer diameter of a bolt gasket on the bent pipe mold is set to D, and the device comprises a positioning assembly and a marking member for marking the start bending point on the bent pipe, wherein the positioning assembly comprises a transverse plate and a vertical plate, the transverse plate is vertically connected with the vertical plate, the marking member is fixedly connected to one end of the transverse plate, and the horizontal distance between one side of the vertical plate close to the marking member and the marking member is set to a, and then a is D/2.

Preferably, the marking piece comprises a connecting portion and a marking portion, one side of the connecting portion is fixedly connected with one end face of the transverse plate, the marking portion is connected to one end of the connecting portion, and one end, far away from the connecting portion, of the marking portion is a tip.

Preferably, the cross-sectional shape of the mark portion is triangular.

Preferably, the shape of the connecting portion is a rectangular parallelepiped.

Preferably, one side of the transverse plate is provided with an extension part, and the extension part extends towards the pointed direction of the tip end.

Preferably, the extension part has an extension length equal to the thickness of the convex edge of the pipe bending die.

In order to solve the same technical problem, the present invention also provides a method using the above-mentioned apparatus for marking a start bending point and a stop bending point of a bent pipe, comprising the steps of:

step 1, placing the device for marking the bending starting point and the bending stopping point of the bent pipe on a guide plate of a pipe bending die, and enabling one side of a vertical plate to be abutted against the outer edge of the bolt gasket of the pipe bending die;

and 2, knocking one end of the mark piece, which is far away from the bent pipe, so that the mark piece marks a mark point on the bent pipe.

Compared with the prior art, the device for marking the starting bending point and the stopping bending point of the bent pipe and the using method thereof provided by the invention have the beneficial effects that: the vertical plate is vertically connected with the transverse plate and used for assisting in positioning the bending starting point or the bending stopping point. The horizontal distance between one side of the vertical plate close to the marker and the marker is half of the outer diameter of a bolt gasket of the pipe bending die. When the positioning component is placed on the pipe bending die and the vertical plate abuts against the outer edge of the bolt gasket, the position of the marking piece is the bending starting point or the bending stopping point of the pipe. And (4) dotting on the pipe by using the marking piece, and then marking the bending starting point or the bending stopping point. The device simple structure utilizes riser and diaphragm as the setting element, and convenient to use moreover only needs to get the riser butt outside the bolt gasket, just can obtain the position of starting the bending point and ending the bending point fast, and it can to recycle the mark piece mark, and the operation is swift. Because the bolt gaskets with the same outer diameter are adopted on the pipe bending dies with different specifications and models, the device for marking the bending starting point and the bending stopping point of the bent pipe can be suitable for the pipe bending dies with different specifications and sizes.

Drawings

FIG. 1 is a top view of a pipe bending die;

FIG. 2 is a schematic view of a connection structure of a device for marking a starting bending point and a stopping bending point of a bent pipe, a pipe bending die and a guide plate according to an embodiment of the invention in a use state;

FIG. 3 is an elevation view of an apparatus for marking the kick-off and end points of an elbow according to an embodiment of the present invention;

FIG. 4 is a side view of an apparatus for marking the kick-off and end points of a bend according to an embodiment of the present invention;

fig. 5 is a schematic structural view of a marker according to an embodiment of the present invention.

In the figure, 1, fastening bolts; 2. bending a pipe die; 21. a pipe bending die body; 22. a guide plate; 3. bending the pipe; 4. a gasket; 5. a positioning assembly; 51. a vertical plate; 52. a transverse plate; 6. a marker; 61. a connecting portion; 62. a marking section; 7. an extension portion; 8. and (4) a convex edge.

Detailed Description

The following detailed description of embodiments of the present invention is provided in connection with the accompanying drawings and examples. The following examples are intended to illustrate the invention but are not intended to limit the scope of the invention.

In the description of the present invention, it should be understood that the terms used in the present invention are used in the description of the present invention, and it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. used in the present invention indicate the orientation or positional relationship indicated based on the drawings, and are only for convenience of describing the present invention and simplifying the description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present invention.

It should be understood that the terms "first", "second", etc. are used herein to describe various information, but the information should not be limited to these terms, which are only used to distinguish one type of information from another. For example, "first" information may also be referred to as "second" information, and similarly, "second" information may also be referred to as "first" information, without departing from the scope of the present invention.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "connected" and "connected" are to be interpreted broadly, e.g., as being fixed or detachable or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

The prior art bending die 2 includes a bending die body 21 and a guide plate 22. As shown in fig. 1, a fastening bolt 1 is screwed to the bending die main body 21, the fastening bolt 1 is screwed to the bending die main body 21 via a circular gasket 4, and the outer diameter of the bolt gasket 4 is D. Both sides of the pipe bending die body 21 are provided with convex edges 8, and the thickness of the convex edges 8 is set to be H.

As shown in fig. 2 to 5, an apparatus for marking a kick-off point and a stop-off point of an elbow according to a preferred embodiment of the present invention is used for marking a kick-off point and/or a stop-off point on an elbow 3 located in an elbow die 2 when the elbow 3 is bent, and includes a positioning assembly 5 and a marking member 6. The positioning component 5 comprises a transverse plate 52 and a vertical plate 51, wherein the bottom side of the vertical plate 51 is vertically connected to the top side of the transverse plate 52, in the use state, the transverse plate 52 is horizontally placed, and the vertical plate 51 is vertically arranged. In the present embodiment, the cross-sectional shape of the positioning assembly 5 is an inverted T-shape, and the horizontal plate 52 and the vertical plate 51 are made of thin plates. The horizontal plate 52 and the vertical plate 51 are both rectangular parallelepipeds. The cross plate 52 has two ends, denoted as a first end and a second end. The marking member 6 is fixedly attached to a first end of the cross plate 52 for dotting marks on the bent tube 3. When the horizontal distance from the marker 6 to the side of the riser 51 close to the marker 6 is a, a is D/2.

The design principle of the device for marking the starting bending point and the stopping bending point of the bent pipe 3 is as follows: on the vertical projection plane, a straight line perpendicular to the guide plate 22 is made to pass through the central point of the elbow die body 21, and the intersection point of the straight line and the axis of the elbow 3 is the boundary point of the straight section and the bent section of the elbow 3, namely the starting bending point and the stopping bending point.

Based on the technical scheme, the device for marking the starting bending point and the stopping bending point of the bent pipe is a tool for positioning and marking the starting bending point and the stopping bending point of the pipe in processing on the pipe bending die 2 in the processing process of the bent pipe 3. The device for marking the bending starting point and the bending stopping point of the bent pipe utilizes the transverse plate 52 and the vertical plate 51 which are vertically arranged to carry out marking and positioning, and utilizes the gasket 4 arranged below the fastening bolt 1 to indirectly obtain the central point of the bent pipe mould body 21 as one of positioning benchmarks. The guide plate 22 of the pipe bending die 2 is used as the second positioning reference. The axis of the marking piece 6 is perpendicular to the axis of the transverse plate 52, and the marking piece 6 should protrude from the transverse plate 52, so that when the positioning assembly 1 is attached to the surface of the bending die body 21, the marking piece 6 can abut against the outer surface of the bent pipe 3. When in use, the pipe is bent on the pipe bending die body 21, and the guide plate 22 is positioned below the pipe bending die body 21. The device for marking the start and stop points of the pipe bend is placed on the guide plate 22 with the bottom side of the cross plate 52 abutting the top side of the guide plate 22, and the positioning member 5 is translated so that the side of the riser 51 adjacent to the marker 6 abuts the outer edge of the bolt washer 4. Since the horizontal distance a between the side of the riser 51 close to the marker 6 and the marker 6 is half of the outer diameter D of the bolt washer 4, the marker 6 abuts against the outer surface of the pipe and is aligned with the kick-up point or the kick-down point. The marking member 6 is then used to mark the tube. This a device for marking the starting bend point and ending bend point of return bend 3 simple structure, convenient to use can mark out the starting bend point and ending bend point of return bend 3 fast to obtain the extension data that kick-backs, the follow-up construction of being convenient for. Because the same size bolt gasket 4 is adopted on the bending dies 2 with different specifications and models, the device for marking the bending starting point and the bending stopping point of the bent pipe 3 has stronger universality and can be suitable for the bending dies 2 with different specifications and models.

The marking member 6 includes a connecting portion 61 and a marking portion 62, and the marking portion 62 is connected to the transverse plate 52 through the connecting portion 61. One side of the connecting portion 61 is fixedly connected with the first end surface of the transverse plate 52, the connecting portion 61 has two opposite end portions, the marking portion 62 is connected at one end of the connecting portion 61, and one end of the marking portion 62 away from the connecting portion 61 is a tip. The above-mentioned a is the distance in the horizontal direction from the tip end to the side of the vertical plate 51 near the first end of the lateral plate 52. The marker 6 is made of a hard material such as an alloy material, and the connecting portion 61 and the marker 62 are connected by gas welding. The marking portion 62 is sharpened to a point to facilitate the marking portion 62 perforating the tube, leaving a mark. In other embodiments, the marking portion 62 may be connected to the connecting portion 61 by other connection means, such as a detachable connection means. The cross-sectional shape of the marking portion 62 is triangular, which facilitates the manufacturing of the marking portion 62 by a manufacturer. The sharp angle of the triangle is the tip. In the present embodiment, the cross-sectional shape of the marking portion 62 is a right triangle, and any one leg of the right triangle is connected to the connecting portion 61, and the other leg is connected to one end surface of the transverse plate 52. The other right-angle side and the hypotenuse of the right triangle form two sides of the tip under the orthographic projection (from top to bottom). Since the tip is closely attached to the cross plate 52, the tip and the end surface of the first end of the cross plate 52 are located on the same line or plane. Therefore, the above-mentioned a is also the horizontal distance between the side of the vertical plate 51 close to the marker 6 and the first end surface of the lateral plate 52. When the device for marking the starting bending point and the stopping bending point of the bent pipe 3 is produced, a manufacturer can firstly process the positioning component 5 according to the outer diameter of the bolt gasket 4, determine the end distance between the vertical plate 51 and the transverse plate 52 and easily process and produce the device. The connecting portion 61 is shaped like a rectangular parallelepiped, which is convenient for processing and manufacturing, and is also beneficial for the connecting portion 61 to be attached to one end face of the transverse plate 52. In this embodiment, the marker 6 may be a punch.

The side of the device for marking the start and stop bending points of the bent pipe close to the marking member 6 is defined as the left side of the device for marking the start and stop bending points of the bent pipe, and the other end of the horizontal plate 52 away from the marking member 6 is positioned at the right side of the device, and the tip end is positioned at the rear side of the device.

Because the bending die body is provided with the convex edge 8, the convex edge 8 has a certain thickness, so in order to ensure that the transverse plate 52 can be attached to the bent pipe, the marking part 62 is convenient for dotting, one side of the transverse plate 52 is provided with the extension part 7, and the extension part 7 extends towards the pointed direction, namely, the extension part 7 extends towards the rear side. The extension 7 may be shaped as a rectangular parallelepiped, and its height should be smaller than the gap left after the bending die body 21 and the guide plate 22 are clamped, so that the mark portion 62 can enter the gap. If the extension length of the extension portion 7 is H, H is H, that is, the extension length of the extension portion 7 is equal to the thickness of the flange 8 of the bending die 2. In the present embodiment, the extension 7 extends for a length less than the length of the marker 6. After the extension part 7 is inserted into the gap, the transverse plate 52 can be attached to the surface of the pipe bending die body 21, and the whole device for marking the starting bending point and the stopping bending point of the bent pipe 3 is kept in a vertically arranged state, so that the marking part 62 can accurately mark the point on the pipe.

In order to solve the same technical problem, the present invention also provides a method using the above-mentioned apparatus for marking the starting bending point and the stopping bending point of the bent pipe 3, which comprises the following steps:

step 1, a device for marking the bending starting point and the bending stopping point of the bent pipe is placed on the guide plate 22, at the moment, the bottom side of the transverse plate 52 is abutted to the top side of the guide plate 22, and the device for marking the bending starting point and the bending stopping point of the bent pipe is moved, so that one side, close to the marking piece 6, of the vertical plate 51 is abutted to the outer edge of the bolt gasket 4 of the bent pipe die 2. Since the distance a between the marker 6 and one side of the vertical plate 51 is D/2 and the gasket 4 is circular, the tip of the marker 6 is on the central axis of the bolt gasket 4, and the point where the tip contacts the outer surface of the pipe is the start bending point or stop bending point of the bent pipe 3. The method can determine the positions of the starting bending point and the stopping bending point of the bent pipe 3 through simple operation in the step 1, and has convenient operation and accurate positioning.

And 2, knocking a marking piece 6 of a device for marking a starting bending point and a stopping bending point of the bent pipe 3 by using a hammer, increasing the pressure intensity of the tip, and punching the marking point on the pipe by the marking piece 6.

The using method is simple in steps and convenient to operate, the mark points can be quickly marked on the bent pipe 3, and workers can obtain more accurate measuring data according to the marked starting bending points and stopping bending points.

The working process of the invention is as follows: before the pipe bending die 2 clamps the pipe and starts bending or before the clamp on the pipe bending die 2 loosens the bent pipe 3, the transverse plate 52 is placed on the guide plate 22 by using the device for marking the starting bending point and the stopping bending point of the bent pipe provided by the embodiment of the invention, and one side of the vertical plate 51 is close to the gasket 4 below the fastening bolt 1 of the pipe bending die 2. Since the extension length H of the extension part 7 is equal to the thickness H of the convex edge 8 of the bending die 2, the vertical plate 51 is tightly attached to the surface of the bending die body 21, and the side of the extension part 7 away from the transverse plate 52 is abutted against the bending pipe 3, at this time, the tip of the marking part 62 is abutted against the bending pipe 3. Since the horizontal distance a between the vertical plate 51 and the marker 6 is equal to half of the outer diameter D of the bolt washer 4, when the vertical plate 51 abuts on the outer edge of the bolt washer 4, the position of the marker 6 is the starting bending point or the stopping bending point of the pipe. The end of the connection 61 remote from the tip is struck with a hammer and the tip is subjected to a greater pressure, leaving a small hole in the tube as a marker point.

In summary, the embodiments of the present invention provide a device for marking a bending start point and a bending stop point of a bent pipe, wherein a vertical plate is vertically connected to a horizontal plate for assisting in positioning the bending start point or the bending stop point. The horizontal distance between one side of the vertical plate close to the marker and the marker is half of the outer diameter of a bolt gasket of the pipe bending die. When the positioning component is placed on the pipe bending die and the vertical plate abuts against the outer edge of the bolt gasket, the position of the marking piece is the bending starting point or the bending stopping point of the pipe. And (4) dotting the pipe by using the marking piece, and then marking the bending starting point or the bending stopping point. The device has a simple structure, utilizes the vertical plate and the transverse plate as positioning pieces, is convenient to use, can quickly obtain the positions of the bending starting point and the bending stopping point only by butting the vertical plate against the outer sides of the bolt gaskets, and can be marked by utilizing the marking piece, so that the operation is quick. Because the bolt gaskets with the same outer diameter are adopted on the pipe bending dies with different specifications and models, the device for marking the bending starting point and the bending stopping point of the bent pipe can be suitable for the pipe bending dies with different specifications and sizes.

The above description is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and substitutions can be made without departing from the technical principle of the present invention, and these modifications and substitutions should also be regarded as the protection scope of the present invention.

Claims

1. The utility model provides a device that is used for mark the start bending point of return bend and ends the bending point for mark start bending point and/or end the bending point on the return bend that is located the return bend in the return bend mould when the return bend, the return bend mould is including supplying the return bend pipe bending's return bend mould body is in with the setting guide plate of return bend mould body below, will the external diameter of the bolt gasket on the return bend mould is established to D, its characterized in that, including locating component with be used for the mark spare of marking on the return bend, locating component includes:

the transverse plate is abutted against the guide plate and translates along the guide plate; and

the vertical plate is vertically connected to the transverse plate and is used for abutting against the outer edge of the bolt gasket; the transverse plate is provided with a first end portion and a second end portion, the marker is fixedly connected to the first end portion of the transverse plate, and the horizontal distance between one side, close to the marker, of the vertical plate and the marker is set to be a, so that a = D/2.

2. The apparatus for marking the start-bending point and the stop-bending point of a bent pipe according to claim 1, wherein the marking member comprises a connecting portion and a marking portion, one side of the connecting portion is fixedly connected with an end surface of one end of the transverse plate, the marking portion is connected to one end of the connecting portion, and one end of the marking portion, which is far away from the connecting portion, is a tip.

3. The apparatus for marking the kick-off and kick-off points of a bent pipe according to claim 2, wherein the marking portion has a triangular cross-sectional shape.

4. The apparatus for marking the kick-off and kick-off points of a bent pipe according to claim 2 or 3, wherein the connecting portion has a rectangular parallelepiped shape.

5. The apparatus for marking the kick-up and kick-down points of a bent pipe according to claim 2, wherein the lateral plate is provided at one side thereof with an extension portion extending in a direction pointed by the tip end.

6. The apparatus for marking the kick-off and kick-off points of a bent pipe according to claim 5, wherein the extension has an extension length equal to the flange thickness of the pipe bending die.

7. A method of using the apparatus for marking the kick-off and end-off points of a curved pipe according to any one of claims 1 to 6, comprising the steps of:

step 1, placing the device for marking the bending starting point and the bending stopping point of the bent pipe on a guide plate of a pipe bending die, and enabling one side of a vertical plate to be abutted against the outer edge of a bolt gasket of the pipe bending die;