CN103934333B - A linear type of bending process HEATER TUBE - Google Patents

Abstract

Process of bending a straight tube furnace, which uses a tube bending apparatus, said bending apparatus includes a left tube rack (13) and pressing means (10), pressing means (10) in the left right rear right, the left frame (13) of the frame (13) is fixedly connected with a dovetail guide (15), dovetail guide (15) extends horizontally in the lateral direction, dovetail guide (15) and the left end the left side frame (13) fixedly connected dovetail guide (15) and the right end of the pressing rear mechanism dovetail groove (10) in a sliding connection, the left frame (13) is provided for the front portion of the furnace a through hole through which the tube; left between the frame (13) and pressing means (10) slidably disposed in sequence on the dovetail guide (15) has three curved from left to right hydraulic means (9).

Description

A linear type of bending process HEATER TUBE

FIELD

[0001] The present application relates to a heating furnace tube is made, in particular to a linear heating furnace tube bending process.

Background technique

[0002] The furnace has been widely used in industry, for example slab heating, heat treatment of the workpiece. In order to increase the uniformity of the heating furnace, the heating furnace tube is often used in the form of bending.

[0003] In the prior art, in order to ensure that the specific requirements of the furnace and the shapes meet the specific heat of the heating requirements are often necessary for bending furnace tube shape specific shape. For the heating furnace tube is curved, often used in the prior art stamping process. This forming method can be implemented quickly and efficiently bending, and high precision, low cost, has a wide application in the prior art. However, this heating easy to produce significant quantities of inhomogeneous deformation, resulting in the cross-sectional area of ​​the heating furnace tube has a large variation in the longitudinal direction of the tube in the longitudinal direction of the heating furnace tube, which makes the heating process heating uniformity is difficult to control and prone to non-uniform stress concentrations during use, resulting in the use of a heating furnace stability, safety is greatly reduced, and shorten the life of the furnace.

[0004] Also with the use of roll bending on the workpiece is bent in the prior art solutions. However, this scheme often employed to bend a workpiece bent one by one, due to the large longitudinal dimension of the workpiece, in the course of a complete rotation of the workpiece, such processing often requires a large working space, and, one by one due to the bending process is employed manner, the process is longer, lower processing efficiency, thereby resulting in increased processing costs, and it is difficult to ensure the shape accuracy machining.

SUMMARY

[0005] The present invention provides a heating furnace tube bending process, which aims to solve the prior art non-uniform deformation processing and long processing, shape precision and low defects, and provide the heating furnace having a particular shape of the tube bending process.

[0006] The present invention employs the following technical solutions:

[0007] The position sensor jig straight tubes and bending stress relief annealing process, which uses a tube bending apparatus, said bending apparatus comprising a furnace tube rack and left pressing means, pressing mechanism in the left machine frame right, rear left and right side of the rack is fixedly connected with a dovetail guide, dovetail guide extending horizontally in the left-right direction, the left end of the dovetail guide is fixedly connected with the left rack, and the right end of the dovetail guide pressing mechanism dovetail sliding connection in the rear, the front portion of the left stand is provided with a through hole for a tube therethrough; dovetail guide on the left to the left between the pressing means and the chassis right sequentially bending slide is provided with three hydraulic means; left front portion of the pressing means is fixed with a first clamp portion fixed to the front left and right side of the rack and a second jig, the left frame and the pressing means is provided between the front rail, the front rail extends linearly between the first clamp and the second clamp, and the slide rail when said pressing means along a dovetail, the second clamp toward the first clamp is possible along the front rail sliding; the preamble Between the first clamp and the second clamp is also provided with a third clamp slidably and fourth clamp, the clamp comprises four gripper base body, and the front clamp block clamp block, each of said clamp front and rear clamp block clamp blocks are front-rear direction in said bending plane a plane oven occurred in the bending tube being disposed opposite to, and in contact with the clamp base to achieve the clamping action of the release and separation; wherein, the rear clamp blocks are located behind the front rail, and a rectangular parallelepiped shape, the front clamp block, are located in front of the front rail, and a cylindrical shape; longitudinal axis of the cylindrical shape and a rectangular parallelepiped shape are the tube is bent perpendicular to the plane of the plane when bent.

[0008] where, provided the right side surface of the second clamp block clamp extends to the right of the right extension stopper, the left side surface of said first clamp block clamp are provided to after left extension extending stopper left, third and fourth clamp jig clamp block left and right side surfaces are respectively provided with a left stopper extension extending to the right to the left and right extending extending stopper.

[0009] Each of the three bending hydraulic cylinder comprises a hydraulic device, the hydraulic cylinder with respect to the longitudinal axis of the dovetail guide arranged vertically, and slidable on the dovetail guide; driving said hydraulic cylinder the rod end is hinged bending roller, and the hydraulic cylinder can be applied to bend forward thrust along a curved roller drive in a direction perpendicular to the dovetail guide; bending the three hydraulic means are each further comprising a travel driving mechanism, for respectively driving the corresponding hydraulic device is bent along the dovetail guide slide to a different position.

[0010] The pressing means push the right support rod with a telescopic mechanism is provided, the telescopic support bar means is disposed in front of the dovetail guide, a telescopic support bar support bar mechanism stretchable, stretchable support rod from the pressing mechanism through the right side leaving the left side of the pressing mechanism and can be used to extend into the inner tube, the support tube so as to prevent play tube bent to undesirable effects, and can be driven in a telescoping support rod mechanism reciprocally moving the lateral direction.

[0011] The tube bending process comprising the steps of:

[0012] A. providing straight tube;

[0013] B. The straight tube penetrates a through hole on the left of the rack and advance to the right, until the straight part of the length of the tube to be bent to the left protruding unit frame;

[0014] C. clamp the left end of the second straight tube clamp;

[0015] D. moving the pressing means, so that the right end of the first clamping fixture of the straight tube;

[0016] E. The third and fourth clamp jig straight tube is clamped between the first clamp and the second clamp and the second clamp such that, third clamp, the first clamp and the fourth clamp linear forearm tubes spaced three lengths equal to a length; a guide rail fixed on the front provided with a left and a right clamp position detection sensor clamp position detection sensor, wherein, said left front rail clamp position detection sensor when the third clamp position corresponding thereto is activated so as to emit a signal when the right front of the guide rail clamp position detection sensor when the position of the fourth clip corresponding thereto when triggered to emit a signal; position of the jig on the front rail sensor sensing the front rail positioned to contribute to the respective processing sections of the furnace tube into lengths equal to the length of three, the position detection sensor is a Hall effect sensor, and the magnetic-effect sensor is a Hall effect sensor or other It is the magnetic sensor;

[0017] F. The three hydraulic bending means to bend each of the contact roller are three lengths of the respective midpoints of the length of each segment;

[0018] G. support bar means urging the telescopic mechanism stretchable support rod extends into the tube straight tube, and leaving the three lengths in the left unsupported lengths of the first, left since the second and third segment lengths are supported;

[0019] H. bend of the left hydraulic device starts roller pressed against said first outwardly lengths, so that it occurs rectilinear bent, with the bending press mechanism is pushed to follow synchronization, Meanwhile, the third jig, the jig also follows the movement of the fourth synchronization; top pressure in the process, is bent leftward movement driven hydraulic device in its left travel drive mechanism, the bending roller held so that it corresponds to the a first position in the longitudinal midpoint of the segment; when the left and right extending stopper extending stopper second jig and a third jig in contact with the bending roll bending hydraulic means of the left pressed against the stop, and pushes stop press agencies continue to push forward;

[0020] 1. The support bar means urging the telescopic mechanism stretchable support rod is retracted, so that the leaving of the three lengths from the left section and a longitudinal length of the second segment from the left none It is supported from the left the third length being supported;

[0021] J. intermediate bending hydraulic means starts pressed against the length of the second segment from the left, right extension until the stopper contacts the third stopper extending left fourth clamp jig;

[0022] K. pressing mechanism such that the support rod is fully retracted, so that none of three lengths are supported;

[0023] L. bending hydraulic device pressed against the right side of the start of the third longitudinal section left, right extension until the stopper contacts the stopper fourth clip extending first left jig;

[0024] M. respective clamp release, removal of the completed bending furnace tubes.

[0025] N. The bendability completed tube into the heating furnace to heat stress for stress relief annealing furnace, the annealing process conditions were: incubation temperature ° C, holding time hours.

[0026] Since the present invention, employed on each clamp extending stopper so that the stopper contact on the tube can be performed after forming a locked, under the influence of force subsequent processing, not It will cause the precise curved shape after molding is affected; while simultaneously employed as a rectangular parallelepiped, one side of a cylindrical clamp, to ensure that sufficient clamping force, but also to form a smooth tube shaped bending deformation of the furnace; the whole process, while feeding in the longitudinal direction, while using the folded rolling as bending, and therefore, it avoids the problems of the prior art have a greater vertical deformation of the bent portion of the processing in the longitudinal direction of the tube, and , in the process, which employs a unique processing form, while feeding, bending roll in a vertical longitudinal direction is operated and moved in a parallel longitudinal direction, thereby maintaining the bending roller relative positional relationship between the curved portions, the tube longitudinally fed in the overall movement of the other gripping means, therefore, to ensure that the entire holding furnace tube is subjected to longitudinal bending direction bending individually Off, continuously throughout the bending process, without repeated clamping and disassembly of the furnace tube, so that the whole process a small working space, but also ensures the processing of short machining shape accuracy. Further, a plurality of clamps is slidable in the process, to ensure that the lock is always held in position with the tube in the process.

BRIEF DESCRIPTION

[0027] FIG. 1 is a schematic plan view of the bending device according to the present invention.

[0028] FIG. 2 is a schematic plan view of the bending device of the present invention of FIG. 1 after the completion of bend tubes.

[0029] FIG. 3 is a schematic top view of the shape of the tube after bending is completed.

detailed description

1-3 of the drawings The present invention is described in detail [0030] below in conjunction.

[0031] The position sensor jig straight tubes and bending stress relief annealing process, which uses a tube bending apparatus, the tube bending apparatus 13 includes a left rack 10 and the pressing means, pressing mechanism 10 in the left side frame 13 to the right, left and rear right side of the rack 13 is fixedly connected with a dovetail guide 15, a dovetail guide 15 extends horizontally in the lateral direction, a left end of the dovetail guide 15 is fixedly connected to the left side frame 13 , dovetail sliding connection with the right rear dovetail guide 15 of the pressing mechanism 10, the front portion of the left side frame 13 is provided with a through hole for passing through the tube; the dovetail guide 15 in the said left side frame 13 and the pressing mechanism between the slide 10 from left to right is provided with three hydraulic bending means 9; left front pressing mechanism 10 is provided with a fixed portion, the right side of the left side frame 13 to the first jig 1 fixed to the front portion 4 is provided with a second clamp, the left front rail is provided between the rack 10 and the pressing mechanism 13, the front guide rail extends linearly between the first clamp and the second clamp 4 I, and when when the pressing mechanism 10 along a dovetail sliding guide 15, the first clamp can be moved in I A second clamp slides toward the guide rail 4; also slidably disposed between the first clamp and the second clamp 4 I on the front rail has a third and a fourth clamp 3 clamps 2, the four clamps 2,3 4 includes a base clamp, the clamp block 41 and the front clamp block 42, each of the rear clamp 41 and front clamp block clamp block 42 are bent along the flat plane in said bending tube furnace occurred in the front-rear direction and disposed opposite to, and capable of making contact and separation of the clamping release action on a jig base; wherein said rear clamp block 41 are located behind the front rail, and a rectangular parallelepiped shape, the front clip block 42 are located in front of the front rail, and a cylindrical shape; longitudinal axis of the cylindrical shape and a rectangular parallelepiped shape are perpendicular to the bending plane of the bending tube occurs when the plane of the furnace.

Clamp block left side surface 43 of the rear [0032] wherein, provided with an extension extending to the right of the right face of the right stopper after said second clamp block clamp 4 clamps the first average I the stopper is provided with a left extension 14 extending to the left, the third and the fourth clamp 3 clamps the clip 2 after the left block, right side surface are respectively provided with an extension extending to the left of the left stopper and right extension extends to the right stopper.

[0033] The three hydraulic bending devices 9 each comprising driving hydraulic cylinder, the hydraulic cylinder relative to the longitudinal axis of the dovetail guide 15 arranged vertically and can slide on the dovetail guide 15; the hydraulic drive rod end of the hydraulic cylinder is hinged with a curved roller 91, and the hydraulic cylinder can be driven along a direction perpendicular to the dovetail guide 15 is applied to the elbow bent forward thrust roller 91; each of said three curved hydraulic apparatus 9 each further comprising a travel drive means for respectively driving the corresponding hydraulic bending device 9 is slid to different positions along the dovetail guide 15.

[0034] The pressing means 10 are provided on the right side support rods telescopic mechanism 12, the telescopic support rod means 12 is provided in front of the dovetail guide 15, support rod 12 has a telescopic mechanism stretchable support bars 120, the stretchable support rod 120 passes through the pressing mechanism 10 from the right side leaving the left side of the pressing mechanism 10 and can be used to extend into the inner tube, the support tube so as to prevent play tube bent to undesirable effects, and can be in the driving mechanism telescoping support rod 12 reciprocates in the lateral direction.

[0035] The tube bending process comprising the steps of:

[0036] A. providing straight tube;

[0037] B. The straight tube penetrates a through hole 13 of the left rack and advance to the right, until the straight part of the length of the tube to be bent is extended to the left rack 13;

[0038] C. The second clamp 4 to the left straight tube clamp;

[0039] D. pressing mechanism 10 is moved to the right so that the first clamping jig I of the straight tube;

[0040] E. The third and fourth clamp 3 clamps two pairs of straight tube is clamped between the first clamp and the second clamp 4 I, and such that the second jig 4, a third clamp 3, fourth clamp 2 I first clamp arm and the straight tube sections of equal length separated by three degrees of growth; the front rail is fixed is provided with a left and a right clamp position detection sensor clamp position detection sensor, wherein, said left front rail when the clamp position sensor sensing the position of the third clamp 3 corresponding thereto is activated so as to emit a signal, a right front rail clamp position of the sensor when the sensing position of the fourth jig 2 corresponding thereto is activated so as to emit a signal; on the front rail the clamp position sensing sensor positioned to contribute to the processing section corresponding to the tube length into the three equal lengths, said position detection sensor is a Hall effect sensor, and the magnetic-effect sensors in the front rail, is a Hall effect sensor or other magnetic effect sensor;

[0041] F. The three hydraulic bending means to bend each of the rollers 9 are in contact with the midpoint 91 of the three lengths in the respective length of each segment;

[0042] G. pressing mechanism support bar 12 of the telescopic mechanism 10 will be stretchable support bars 120 extending into the inner tube straight tube, and leaving the three lengths from the first longitudinal segment is not left support, left second and third lengths to be supported;

[0043] H. bending the left hydraulic device 9 is bent outwardly pressed against the roller begins a first length segment to bend so as to cause rectilinear, curved with the pressing mechanism 10 is pushed to follow synchronization pressure, while the third clamp 3, the fourth jig 2 also follows move synchronously; top pressure in the process, the 9 driven in its movement to the left travel drive means bending the left hydraulic device, so that it is bent roll holding a first position corresponding to the midpoint of the segment length; right extension stopper when the second clamp 43 and the third clamp 4 extending left in contact with the stopper 3, the left side of the hydraulic device 9 is bent bending roller pressed against the stop, and the pressing mechanism 10 is pressed to move forward to stop;

[0044] 1. The pressing mechanism support bar 12 of the telescopic mechanism 10 will be stretchable support rod 120 is retracted, so that the leaving of the lengths of the three lengths from the left and a left second length no segments are supported from the left the third length being supported;

[0045] J. intermediate bending hydraulic means 9 starts from the left pressed against the second longitudinal section, the third clamp until the right extension stopper 3 and the fourth clamp 2 extending left in contact stopper;

[0046] K. pressing mechanism 10 such that the support bar 120 is fully retracted, so that none of three lengths are supported;

[0047] L. bending the right hydraulic means 9 starts from the left top of the press section of a length of the third, fourth clamp until the right extension 2 and the stopper clamp the first I left in contact with the stopper extends;

[0048] M. respective clamp release, removal of the completed bending furnace tubes.

[0049] N. The bendability completed tube into the heating furnace to heat stress for stress relief annealing furnace, the annealing process conditions were: incubation temperature of 300 degrees Celsius, 3 hours soaking time.

Claims (1)

1. The position sensor jig straight tubes and bending stress relief annealing process, which uses a tube bending apparatus, said bending apparatus includes a left tube rack (13) and pressing means (10), push pressure means (10) in the left frame (13) to the right, the left and right rear frame (13) is fixedly connected with a dovetail guide (15), dovetail guide (15) extends horizontally in the lateral direction, the dovetail guide rails (15) and a left end of the left rack (13) fixed to the rear of the dovetail connection, a dovetail guide (15) and the right end of the pressing mechanism (10) in a sliding connection, the left frame (13) a front portion provided with a through hole through which the supply tube; left in the rack sliding from left to right is provided between the three (13) and pressing means (10) on said dovetail guide (15) bending hydraulic device (9); the left front portion of the pressing mechanism (10) is provided with a first fixing jig (the I), the left frame (13) fixed to the right side of the front portion is provided with a second clamp (4), in disposed between the left side frame (13) and pressing means (10) has a front rail, said front guide rail extends linearly between the second clamp (4) and a first clamp (the I), and when the pressing means (10) along the dovetail When the rail (15) slides, a first clamp (I) can be toward the second clip along the front rail (4) slide; sliding further between the second clamp (4) and a first clamp (I) on the front rail provided with a third clamp (3) and a fourth clamp (2), the four clamps (3, 4) comprises a base clamp, the clamp block (41) and the front clamp block (42), each of the rear clamp block clamp (41) and the front clamp block (42) both along the longitudinal direction of the tube occurs when the bending plane of the bending plane and oppositely disposed, and a jig base body contacting and separation can be achieved releasable clamping action; wherein, after said clamp block (41) are located behind the front rail, and a rectangular parallelepiped shape, the front clamp block (42) are located in the front of the front rail when the bending plane longitudinal axis of the cylindrical shape and a rectangular parallelepiped shape are perpendicular to the plane of the tube bend;; and wherein right after the cylindrical shape, said second clamp (4) of the clamp block surface is provided with a right extension stop (43) extending to the right, the left side surface of the first jig (I) of the clamp blocks are provided with an extension extending to the left of the left Bit block (14), the third clamp (3) and a fourth clamp (2) clamp block left and right side surfaces, respectively, are provided with an extension extending to the left of the left stopper and extending to the right extending right stopper; bending each of the three hydraulic means (9) includes a hydraulic cylinder, the hydraulic cylinder with respect to the dovetail guide (15) arranged perpendicular to the longitudinal axis, and is capable dovetail guide the slide (15); a hydraulic driving the rod end of the hydraulic cylinder is articulated bending roller (91), and a hydraulic cylinder capable of driving along dovetail guide (15) is applied to the driving direction perpendicular to the bending roller (91) forward bending thrust; each of said three bending hydraulic means (9) are further comprising a travel drive means for respectively driving the corresponding hydraulic bending means (9) slide along the dovetail guide (15) to a different position; pressing the right setting means (10) has a telescopic support bar means (12), a telescopic support bar means (12) disposed in front of the dovetail guide (15), the telescopic support bar means (12) having stretchability support bars (120), the stretchable support bars (120) through the pressing means away (from the right side of a pushing mechanism (10) 0) can be used for the left side and protrudes into the inner tube, the support tube so as to prevent play tube bent to undesirable effects, and can be driven in the horizontal direction on the support rod in a telescopic mechanism (12) reciprocating movement; the tube bending process comprising the steps of: A. providing straight tube; B. the straight tube penetrates the left side frame a through hole (13) and advance to the right, until the straight length of tube to be bent portion protrudes to the left side frame (13); C. said second clamp (4) to the left end of the straight tube clamp; D. pressing means (10) movement, so that the first clamp (I) clamping a right end of the straight tube; E. third clamp (3) and a fourth clamp (2) in the second clamp (4) and a first between the clamps (I) of the straight tube clamp, and such that the second clamp (4), a third clamp (3), fourth clamp (2) and the first clamp (I) of the straight tube forearm growth of separated three equal lengths; fixed clamp position detection sensor with a left and a right clamp position sensor sensing the front rail, wherein said left front rail clamp position When the position of the third detection sensor clamp (3) corresponding thereto is activated so as to emit a signal, a right front rail clamp position of the sensor when the sensing position of the fourth clip (2) corresponding thereto is activated so as to emit a signal; front rail sensing the position of the clamp on sensor positioned to contribute to the respective processing sections of the furnace tube into lengths equal to the length of three, the position detection sensor is a Hall effect sensor, and a magnetic effect in the front rail sensor is a Hall effect sensor or other magnetic effect sensor; F. bending the three hydraulic means (9) to bend each roller (91) contacting each of said lengths corresponding to three the midpoint of the length of each segment; G. pressing mechanism (10) is a telescopic support bar means (12) stretchable support bars (120) extending into the tube straight tube, and leaving a length of the three in paragraph left unsupported lengths of the first, second and third from the left is supported lengths; bend of a hydraulic device (9) of the left side of the roll begins H. outwardly against said first top segment length, so that a straight line it occurs Bending, pressing means (10) is to follow with the bending press push synchronization, while the third clamp (3), the fourth clip (2) also follows the movement of synchronism; top pressure in the process, the left side bending hydraulic device (9) driven in its movement to the left travel drive mechanism, the bending roller so that it held a first position corresponding to the midpoint of the length of the segment; the right when the second clamp (4) extending limit bit block (43) and a third clamp (3) extending in a left stopper contact, bending of the left hydraulic device (9) is pressed against the bending roller stop, and the pressing mechanism (10) to discontinue the forward pressing; 1. the pressing mechanism (10) is a telescopic support bar means (12) stretchable support bars (120) is retracted, so that the left, leaving the three lengths from the first longitudinal section and second from the left lengths were not supported, the left third length being supported; J. intermediate bending hydraulic means (9) pressed against the start of the second length segments from the left, until the third clamp ( 3) the stopper and the fourth right extension clip (2) extending in the left stopper contacts; K. pressing means (10) such that the support rod (120) is fully retracted, so that None length segments are supported; L. bent right hydraulic means (9) starts pressing the top left third longitudinal section, until the fourth clamp (2) extends right to the first stopper clamp ( I) contacting the left extension stopper; M. respective clamp release, removal of the completed bending furnace tube; N. bending processing completed heating furnace tube into the stress-relief heat treatment for stress relief annealing furnace, annealing conditions are: holding temperature of 300 degrees Celsius, 3 hours soaking time.