CN209902101U - Forming device and forming system of three-way pipe - Google Patents

Abstract

The utility model relates to a forming device and forming system of three-way pipe belongs to automated processing technical field. The forming device comprises a pipe material clamping die and a forming unit, wherein the forming unit comprises a male die extrusion unit and a forming core rod unit; the male die extrusion unit comprises a first internal pressure male die and a second internal pressure male die which are oppositely arranged, and a die pressing feeding unit which is used for driving the two internal pressure male dies to relatively move along the tube flattening direction so as to extrude the tube part to be pressed; the forming mandrel unit comprises a mounting seat and two forming mandrels which are arranged on the mounting seat in parallel; each forming core rod is fixed on a core rod seat, the core rod seat can be movably arranged on the mounting seat along the space change direction between the two forming core rods, and the space change direction is approximately vertical to the tube flattening direction. The device can realize the flattening process and the internal pressure forming process in the prior art in the same process, and can be widely applied to the manufacturing fields of aviation, refrigeration, automobiles and the like.

Description

Forming device and forming system of three-way pipe

Technical Field

The utility model relates to an automatic change processing equipment field, specifically speaking relates to a forming device of three-way pipe and with the molding system of this forming device structure.

Background

The three-way pipe is commonly used on an air-conditioning refrigeration system to connect multi-channel pipelines. For the processing, one end portion is usually flared, and then the flared end portion is subjected to flat forming. Common processing methods include a manual manufacturing mode and a semi-automatic processing mode, wherein the manual mode adopts pure manpower to perform flaring and flat forming, so that the time and labor are wasted, the production efficiency is low, the labor cost is high, and the method is not suitable for batch production; the semi-automatic processing mode adopts semi-mechanical and semi-manual operation, a worker firstly clamps the tee joint on a machine tool through a clamp, then performs flaring through a flaring cutter, and after the flaring is finished, manually dismantles the workpiece; the worker clamps the tee joint on the machine tool through the clamp, the flattening device is used for flattening the formed workpiece, after the flattening forming, the workpiece is manually disassembled to complete the processing of the tee joint, and the semi-automatic processing mode is low in production efficiency. Further, patent document No. CN208230600U discloses a method of manufacturing a Y-type three-way pipe using a T-shaped pipe, which requires a T-shaped pipe to be manufactured first, and thus the overall processing efficiency is also low.

In order to improve the processing efficiency of the three-way pipe and the automation degree of the equipment, patent document No. CN104646559A discloses an automatic processing equipment for the three-way pipe, which specifically comprises a frame, a flaring mechanism and a flattening forming mechanism arranged on the frame, a feeding device arranged at a feeding port, a discharging device arranged at a discharging port, and a manipulator mechanism arranged above the flaring mechanism and the flattening forming mechanism, wherein the manipulator mechanism conveys a workpiece from the feeding port of the feeding device to the flaring mechanism for flaring the workpiece, then conveys the workpiece from the flaring mechanism to the flattening forming mechanism for forming the workpiece by the flattening forming mechanism, and finally, the manipulator mechanism grasps the formed workpiece and puts the workpiece into the discharging device to complete the discharging of the workpiece. The flattening forming mechanism comprises a pipe material clamping die and a forming unit, and the forming unit comprises a male die extrusion unit and a forming core rod unit; as shown in fig. 8 and fig. 10, the punch press unit includes a first internal punch 4038 and a second internal punch 4038 which are arranged oppositely, and a die pressing feed unit for driving the two internal punches to move relatively along the tube flattening direction to press the tube to be pressed; the forming mandrel unit comprises an installation seat and two forming mandrels 4024 which are arranged on the installation seat in parallel.

The equipment sequentially comprises a feeding step, a flaring step and a forming step in the process of forming the three-way pipe; the forming step comprises a flattening forming step and an internal pressure forming step, wherein the flattening forming step comprises flattening the flared part by utilizing the side wall surface 4037 of the clamping die; the internal pressure forming step comprises the steps of inserting two forming core rods 4024 which are arranged in parallel into the flattened flared part, then utilizing an internal pressure convex die 4038 to press the flattened flared part to enable the flared part to be concave inwards to form an inwards concave pipe wall structure, and using the two forming core rods 4024 as an internal supporting die to form the tee pipe structure. Although the automation degree of the equipment is improved, the process is complicated because the forming step needs to be flattened firstly and then subjected to internal pressure forming, and the structural types of the three-way pipe which can be formed are few.

SUMMERY OF THE UTILITY MODEL

The utility model mainly aims at providing a three-way pipe forming device, which improves the flexibility of forming structure transformation while reducing the forming processes;

the utility model discloses an at an aim at provide a three-way pipe forming system who founds with above-mentioned forming device.

In order to achieve the above purpose, the forming device provided by the utility model comprises a pipe material clamping die and a forming unit, wherein the forming unit comprises a male die extruding unit and a forming core rod unit; the male die extrusion unit comprises a first internal pressure male die and a second internal pressure male die which are oppositely arranged, and a die pressing feeding unit which is used for driving the two internal pressure male dies to relatively move along the tube flattening direction so as to extrude the tube part to be pressed; the forming mandrel unit comprises a mounting seat and two forming mandrels which are arranged on the mounting seat in parallel; each forming core rod is fixed on a core rod seat, the core rod seat can be movably arranged on the mounting seat along the space change direction between the two forming core rods, and the space change direction is approximately vertical to the tube flattening direction.

The space between the two forming core rods is set to be a structure capable of being expanded, so that the space between the two forming core rods can be driven to be increased to stretch the pipe part in the process of internal pressure forming, and the flattening process and the internal pressure forming process in the prior art are realized in the same process; meanwhile, in the forming process, the distance between the two forming core rods is adjustable, so that three-way pipes with different structural types can be formed.

The specific scheme is that a resetting mechanism is installed on the installation seat, and the elastic resetting force of the resetting mechanism forces the distance between the two forming core rods to be reduced. So as to effectively keep the core rod reset in the non-working state.

More specifically, the reset mechanism comprises a compression spring, one end of the compression spring is propped against the mandrel seat, and the other end of the compression spring is propped against the mounting seat; in the interval changing direction, the mandrel seat is propped against the limiting stop mechanism, so that the mandrel seat is stopped and positioned in the resetting process.

The other specific scheme is that the forming mandrel unit comprises a distance expanding unit for driving the distance of the two forming mandrels to expand in the distance changing direction; the distance enlarging unit applies a distance enlarging force to the mandrel holder or the non-molding rod portion of the molding mandrel. Through setting up interval expansion unit, and the interval between the expansion plug that can be more steady to the pipe material can extrude better.

The more concrete scheme is that the interval enlarging unit and the mould pressing feeding unit share the same driving unit; the interval expansion unit comprises an extrusion convex part fixed on the inner side part of the die holder of the internal pressure convex die; the extrusion bulge comprises two wedge-shaped surfaces arranged at an included angle and is used for extruding a gap between two mandrel seats and/or a gap between non-forming rod parts of two forming mandrels. The interval enlarging unit has simple structure and is convenient to realize and manufacture.

The mould pressing feeding unit comprises a base, a mould seat for fixing an internal pressure convex mould, a linear displacement output device for outputting displacement and a force amplification conversion mechanism, wherein the linear displacement output device is arranged along the axial direction of a core rod; the base comprises a bottom plate, two supporting plates and two guide rods, wherein the plate surface of the two supporting plates is arranged in parallel to the interval change direction and fixedly arranged on the bottom plate, and the two guide rods are arranged along the tube flattening direction, and the end parts of the two guide rods are fixedly supported on the two supporting plates; two guide holes arranged on the die holder are correspondingly sleeved outside the two guide rods, so that the die holder can be clamped between the two supporting plates in a reciprocating motion along the tube flattening direction; the force amplification conversion mechanism comprises a slide block and two force-increasing connecting rods; the sliding block can be arranged on the base in a sliding manner along the axial direction of the core rod; the swing ends of the two force-increasing connecting rods are hinged, the fixed end of one of the two force-increasing connecting rods is hinged with the outer side part of the sliding block, the fixed end of the other one of the two force-increasing connecting rods is hinged with the outer side part of the die holder, and the two force-increasing connecting rods form a V-shaped force-increasing mechanism with an acute included angle and a swing end protruding outwards; and a rotor of the linear displacement output device is fixedly connected with the slide block.

The other preferred scheme is that the mandrel seat can drive the distance between two forming mandrels to expand and adjust under the action of external force.

And the inner side surface of the die holder of the internal pressure convex die is fixedly provided with a stamping die, and the two sides of the core rod are both provided with concave die grooves matched with the stamping die.

In order to achieve the above another object, the utility model provides a three-way pipe forming system, which comprises a feeding device, a flaring device, a forming device and a material transferring system for transferring pipe materials between the devices in sequence; the forming device is the forming device described in any one of the above technical solutions.

The feeding device comprises a chipless rotary cutting machine head, a fixed drawing clamping die, a movable drawing clamping die and a drawing driver, wherein the drawing driver is used for driving the movable drawing clamping die to axially reciprocate relative to the fixed drawing clamping die along a rotary main shaft of the chipless rotary cutting machine head; and along the axial direction of the rotating main shaft, the movable material drawing clamping die is positioned at the cutting end side of the chipless rotary cutting machine head, and the fixed material drawing clamping die is positioned at the other end side. In the feeding process, the pulling-off groove is pre-cut by using a chipless rotary cutting mode, and then the short pipe materials are pulled off to obtain the short pipe materials, so that the internal shrinkage of the cut pipe orifice is less.

Drawings

Fig. 1 is a perspective view of a molding system of embodiment 1 of the present invention at a first viewing angle;

fig. 2 is a perspective view of embodiment 1 of the molding system of the present invention at a second viewing angle;

fig. 3 is a perspective view of a coil straightening unit in embodiment 1 of the molding system of the present invention;

fig. 4 is a perspective view of the feeding unit in embodiment 1 of the molding system of the present invention;

fig. 5 is a perspective view of a chipless rotary cutting unit in embodiment 1 of the forming system of the present invention;

fig. 6 is a perspective view of a pipe bending machine head in embodiment 1 of the molding system of the present invention;

fig. 7 is a perspective view of the elbow feeding main shaft in embodiment 1 of the forming system of the present invention;

fig. 8 is a perspective view of a movable clamp die in embodiment 1 of the molding system of the present invention;

fig. 9 is a perspective view of the forming unit and the flaring unit in the forming system of embodiment 1 of the present invention at a first viewing angle;

fig. 10 is a perspective view of the forming unit and the flaring unit in a second viewing angle according to embodiment 1 of the forming system of the present invention;

figure 11 is a perspective view of a molding unit of example 1 of the molding system of the present invention from a first perspective;

figure 12 is a perspective view of a molding unit of example 1 of the molding system of the present invention from a second perspective;

FIG. 13 is an enlarged view of a portion A of FIG. 12;

fig. 14 is a relative position diagram of two forming mandrels before forming in embodiment 1 of the forming system of the present invention;

fig. 15 is a diagram showing the relative positions of two core bars after the molding process is completed according to embodiment 1 of the molding system of the present invention;

fig. 16 is a front view of the pipe end processing unit in embodiment 1 of the molding system of the present invention;

fig. 17 is a perspective view of a traverse robot in embodiment 1 of the molding system of the present invention;

fig. 18 shows a three-way pipe structure formed by using the forming system of the present invention in example 1;

fig. 19 is a schematic structural view of the pitch-enlarging unit in embodiment 2 of the molding system of the present invention.

Detailed Description

The present invention will be further described with reference to the following examples and accompanying drawings.

The utility model discloses a main idea is to improve the mounting structure of the shaping plug among the forming device to can realize the work of pressing the shaping step and flattening the shaping step in the prior art simultaneously in same process. In the following embodiments, mainly for the description of the structure of the forming apparatus, the structures of the feeding apparatus, the flaring apparatus, the pipe end processing apparatus, the pipe bending apparatus, and the discharging apparatus may be designed with reference to existing products.

Molding System example 1

Referring to fig. 1 to 17, the utility model discloses tee bend pipe forming system 1 includes frame 10 and installs loading attachment 11 in this frame 10 according to the preface, flaring device 12, forming device 13, pipe end processing apparatus 14, swan neck system 15 and material moving manipulator system 16, material moving manipulator system 16 is used for transferring the pipe material between each device according to the preface, material moving manipulator system 16 includes sideslip manipulator system 17 and the unloading manipulator system 18 on the return bend to make each device according to the process sequence, process according to the preface ground pipe material, in order to obtain tee bend 01 as the structure shown in fig. 18.

As shown in fig. 1 to 5 and 8, the feeding device 11 includes a straightening unit 21, a feeding unit 22, a fixed drawing clamp 23, a chipless rotary cutter head 24, a movable drawing clamp 25 and a drawing cylinder 26.

As shown in fig. 3, the straightening unit 21 is used for straightening a non-straight pipe material such as a coiled pipe, and as shown in fig. 3, includes a rounding wheel 211, a vertical straightening wheel 212 and a horizontal straightening wheel 213, which are rotatably mounted on the bracket 210, according to the traveling direction of the pipe material in the straightening process, i.e., the direction shown along the Y-axis direction in the figure.

As shown in fig. 4, the feeding unit 22 includes a linear guide 220 mounted on the frame 10 in the Y-axis direction, a mounting slide 221 slidably mounted on the linear guide 220, a feeding clamping die 222 and a feeding guide hole seat 223 mounted on the mounting slide 221, and a linear displacement output device 224 for driving the mounting slide 221 to reciprocate along the Y-axis direction. In this embodiment, the feed collet mold 222 is an up-and-down open-close type collet mold driven by a collet mold cylinder 2220. The linear displacement output device 224 can select linear displacement output equipment such as a linear motor, an air cylinder, an oil cylinder, a gear rack mechanism matched with a rotating motor, a screw rod nut mechanism matched with the rotating motor or a synchronous belt matched with the rotating motor; in this embodiment, a rotating motor is specifically selected to be matched with the feed screw-nut mechanism, and a nut of the feed screw-nut mechanism is fixedly connected with the mounting slide seat 221.

As shown in fig. 5, the chipless rotary cutter head 24 includes a cutter head 240, a cutter pushing mechanism 241, and a head rotating motor 242 for rotating the cutter head 240 by a timing belt mechanism drive 246, and the cutter head 240 includes a rotating spindle 243, and a cutting blade 244 and a material holding bearing 245 mounted on the front end portion of the rotating spindle 243.

As shown in fig. 5, the stationary drawing die 23 is an up-and-down opening and closing die driven by the die clamping cylinder 230, and is directly fixed to the mounting frame 2400 of the chipless rotary cutter head 24, and is located on the upstream side of the chipless rotary cutter head 24, i.e., on the non-cutting end side thereof, in the Y-axis forward direction.

As shown in fig. 8, the movable material drawing clamping die 25 is located at the downstream side of the chipless rotary cutter head 24, i.e. at the cutting end side of the chipless rotary cutter head 24, and is a transverse open-close type clamping die, and comprises a mounting slide 250 slidably mounted on the frame 10 through a linear guide mechanism 27 arranged along the Y-axis direction, a fixed clamping die 251 fixed on the mounting slide 250, and a movable clamping die 254 driven by a clamping cylinder 253 through a V-shaped amplifying link mechanism 252, wherein a piston rod 2530 of the clamping cylinder 253 and the V-shaped amplifying link mechanism 252 form a Y-shaped structure. The material pulling cylinder 26 constitutes the material pulling driver in the present embodiment, and may be constructed by using a linear displacement output device such as an oil cylinder, a linear motor, etc., for driving the movable material pulling clamping die 25 to axially reciprocate along the rotation main shaft of the chipless rotary cutting machine head 24, i.e. along the Y-axis, relative to the fixed material pulling clamping die 23. The movable material pulling clamping die 25 is used for clamping a copper pipe during cutting, breaking, flaring, tee joint forming and other front end pipe end processing, a connecting rod force boosting mechanism is adopted for clamping, the overall dimension of the clamping mechanism is effectively reduced, the processing of products as short as possible can be met, the processing of products of 90 mm can be met at the shortest time, namely the same clamping die is shared by the flaring device 12, the forming device 13 and the chip-free rotary cutting unit in the feeding device 11.

Referring to fig. 6 and 7, the pipe bending device 14 includes a pipe bending head 31 and a feeding trolley 32, and the pipe bending head 31 includes a circular mold 310, a clamping mold 311, a guiding mold 312, a pipe bending servo motor 313, a clamping mold cylinder 314, and a guiding mold cylinder 315. The feeding trolley 32 comprises a feeding servo motor 320, a ball screw 321, a rotary servo motor 322, a material clamp 323, a mounting slide seat 324, a feeding main shaft 326 and a linear guide rail 325 arranged along the Y-axis direction, wherein the mounting slide seat 324 is slidably mounted on the rack 10 along the Y-axis direction through the linear guide rail 325, the feeding servo motor 320 and the ball screw 321 drive the mounting slide seat 324 to reciprocate along the Y-axis direction relative to the rack 10, the rotary servo motor 322 is used for driving the feeding main shaft 326 to rotate, and the material clamp 323 is arranged on the front end portion of the feeding main shaft 326. The tube bending device 14 is a mechanism for bending a tube material into a desired shape. The bending is driven by a matched mode of a bent pipe servo motor 313 and a transmission gear 316, the clamping die 311 clamps the pipe materials onto the circular die 310, then the bent pipe servo motor 313 drives the clamping die 311 and the circular die 310 to rotate around the center of the circular die 310 along with the swing arm 317, so that the pipe materials are bent, and meanwhile, in order to prevent the bent parts of the pipe materials from being wrinkled, the guide die 312 is needed to guide the rear ends of the pipe materials. A bent pipe section is a mechanism that bends a product into a desired shape. The grippers 323 of the feed carriage 32 constitute a gripper die in this embodiment.

As shown in fig. 9 and 10, the flaring device 12 includes a flaring punch, a tube clamp die, and a feed driver for driving the flaring punch to reciprocate in the die direction relative to the tube clamp die, i.e., to reciprocate in the Y-axis direction. In this embodiment, the tube clamp die is constructed using a movable draw clamp die 25 as shown in fig. 8, the flaring punch thereof includes a first straight punch 41, a second straight punch 42 and a rotary punch 43, and the feed driver can be constructed using various linear displacement output devices, in this embodiment, a die cylinder 44 is used for framing. The flaring device 12 includes a spinning electric spindle 45 for driving the spinning punch 43 to rotate.

As shown in fig. 9 to 15, the forming device 13 includes a pipe clamp mold and a forming unit 5, wherein the pipe clamp mold is constructed by using a dynamic material drawing clamp mold as shown in fig. 8. The forming unit 5 comprises a male die extrusion unit and a forming core rod unit; the punch press unit includes a first inner punch 50 and a second inner punch 51 arranged oppositely, and a die press feed unit 52 for driving the two inner punches 50, 51 to move relatively in a tube flattening direction along the direction indicated by the X axis in the drawing to press the tube portion to be pressed. The die press feed unit 52 includes a base 53, die holders 54, 55 for fixing the inner press punches 50, 51, a linear displacement output device 56 for outputting displacement arranged in the Y-axis direction, and a force amplification conversion mechanism 57.

The base 53 comprises a bottom plate 530, two support plates 531 and 532 arranged on the bottom plate 530 with the plate surface parallel to the YOZ plane, and two guide rods 533 and 534 arranged along the X axis and with the end parts fixedly supported on the two support plates 531 and 532; the two guide holes 540 and 541 arranged on the die holder 54 are correspondingly sleeved outside the two guide rods 533 and 534, so that the die holder 54 can be clamped between the two support plates 531 and 532 in a reciprocating manner along the X axial direction; two guide holes 550, 551 arranged on the die holder 55 are correspondingly sleeved outside the two guide rods 533, 534, so that the die holder 54 can be clamped between the two support plates 531, 532 in a reciprocating manner along the X-axis direction; the force amplification conversion mechanism 57 comprises a slide block 570 and two force-increasing connecting rods 571 and 572; the sliding block 570 is mounted on the base 53 in a manner of sliding along the Y-axis direction by matching with the guide hole of the guide hole seat 578; the swinging ends of the two force increasing connecting rods 571 and 572 are hinged, the fixed end of the force increasing connecting rod 571 is hinged with the outer side part of the sliding block 570, the fixed end of the force increasing connecting rod 572 is hinged with the outer side part of the die holder 570, and the two form a V-shaped force increasing mechanism with an acute included angle and a swinging end protruding outwards; the mover of the linear displacement output device 56 is fixedly connected with the slider 570 so as to reciprocate along the Y-axis direction by the driver; the linear displacement output device 56 may be a linear motor, an air cylinder, an oil cylinder, or the like, and in the present embodiment, is constructed using an air cylinder. Each die holder is driven by a set of force amplification and conversion mechanism 57, and the two sets of force amplification and conversion mechanisms 57 are symmetrically arranged about a middle plane which is parallel to the YOZ plane, so that in the working process, the force amplification and conversion mechanism 57 is utilized to boost the linear displacement output by the linear displacement output device 56 along the Y axial direction and convert the linear displacement into the movement arranged along the X axial direction, so as to drive the two die holders 54 and 55 to move towards each other and synchronously move towards each other at a constant speed.

In the X-axis direction, the internal pressing punches 50, 51 are rib structures fixed on the inner side surfaces of the die holders 54, 55, respectively, and the cross sections of the rib structures are isosceles triangle structures, so that two wedge-shaped surface pairs 500, 501 and two wedge-shaped surface pairs 510, 511 are formed in an angle structure. The internal pressure convex die can be manufactured with the corresponding die holder in an integrated forming mode, and can also be manufactured separately and then fixedly connected into an integrated structure.

The forming mandrel unit includes a base 53 and two forming mandrels 63 and 64 that are mounted on the base 53 slidably in the Z-axis direction by mandrel holders 61 and 62 and arranged in parallel. That is, the fixed end of each forming mandrel is fixed to a mandrel holder, specifically, a mounting holder 60 is fixed to a bottom plate 530 of the base 53, and mandrel holders 61, 62 are movably mounted on the mounting holder 60 in the Z-axis direction so as to be movably mounted on the mounting holder 60 in a pitch changing direction between the two forming mandrels 63, 64, the pitch changing direction being arranged in the Z-axis direction in the drawing, that is, in the present embodiment, the pitch changing direction is substantially perpendicular to the tube flattening direction, wherein the tube flattening direction is configured in a direction in which the tube wall is pressed inward into an inward-concave tube wall structure when the three-way tube structure is formed from the tube material. The connection relation between the core rod and the core rod seat can be that the core rod and the core rod seat are integrally formed, or the core rod and the core rod seat are formed by cutting the same metal block, or two metal pieces are fixedly connected into an integral structure by welding, screwing and other modes.

A resetting mechanism is arranged on the mounting seat 60, and specifically comprises a guide rod 65 and a compression spring 66 sleeved outside the guide rod 65, one end of the compression spring 66 is pressed against the mandrel seats 61 and 62, and the other end is pressed against the mounting seat 60; one end of the guide rod 65 is fixedly connected with the mandrel holder, and the other end is in sliding guide fit with the guide hole 600 arranged on the mounting seat 60, so that the mandrel holder can reciprocate along the Z-axis direction relative to the mounting seat 60; the resilient restoring force generated by the compression spring 66 forces the mandrel holders 61, 62 to move inwardly towards each other, so as to drive the forming mandrels 63, 64 to move in a direction in which the distance between them decreases. As shown in fig. 13, in the Z-axis direction, the inner end surfaces of the mandrel holders 61, 62 abut against the protrusions 5400 fixed on the die holder, so as to form a stop positioning mechanism for the two mandrel holders 61, 62 in the process of reducing the distance between the mandrels; in this embodiment, the inner end surface of the mandrel holder is provided with abutting notches 6100, 6200, so that the distance between the two forming mandrels 63, 64 is as small as possible, so as to better insert into the pipe to be pressed.

In order to make the two forming mandrels 63, 64 expand outward better in the process of inner pressure forming to stretch the pipe wall, a spacing expansion unit is fixedly arranged on the base 53 and comprises extrusion convex parts 71, 72 fixed on the inner side parts of the two die holders 54, 55; the press projections 71, 72 comprise two wedge-shaped pairs 710, 711 and 720, 721 arranged at an angle for squeezing apart the gap between the non-forming rod parts of the two forming mandrels 63, 54, so that the distance between the two forming mandrels 63, 64 is increased. That is, in the present embodiment, the pitch enlarging means applies a pitch enlarging force to the non-forming rod portions of the forming plugs 63, 64, and the pitch enlarging means and the die feed means share the same drive means.

In order to enable the three flaring stations and one forming station to share the movable material drawing and clamping die 25 with the chipless rotary cutting machine head 24, a station switching mechanism is mounted on the frame 10, and the station switching mechanism comprises a transverse sliding base 73 movably mounted on the frame 10 and a switching driver for driving the transverse sliding base 73 to move along the X-axis direction relative to the frame 10, wherein the transverse sliding base 73 is slidably mounted on the frame 10 through a linear guide rail sliding block mechanism 74 arranged along the X-axis direction, the switching driver is a linear displacement output device, and can be selected from a linear motor, a multi-stroke air cylinder, a multi-stroke oil cylinder and the like, in the embodiment, a rotary servo motor 75 is constructed in cooperation with a screw-nut mechanism 76, and a stroke switch is arranged at the corresponding station to detect and position the sliding position of the transverse sliding base 73 on the linear guide rail sliding block. The three flaring punches and the forming unit are each slidably mounted on the cross-sliding base 73 by means of a rail slider mechanism 77 arranged in the Y-axis direction; the flaring device 12 and the forming unit 5 share the same feeding driver, which comprises a linear displacement output device 81 and a feeding driving seat 82 for pushing and pulling the three flaring punches and the forming unit to synchronously feed in the Y-axis direction; the linear displacement output device can adopt an air cylinder, an oil cylinder, a linear motor and the like, in the embodiment, the air cylinder is adopted, the cylinder body of the air cylinder is fixed on the frame 10, the piston rod is fixedly connected with the feeding driving seat 83 through a slide block on a guide rail slide block mechanism 84 arranged along the X axial direction, so that three flaring punches and one forming unit can be driven based on the same feeding unit, and the distance between the flaring punches and the movable drawing clamping die in the Y axial direction is adjusted.

As shown in fig. 16, the tube end processing device 14 is used for performing tube end processing such as flaring, necking, chamfering and the like on the rear tube end of the tube stock, and in this embodiment, specifically includes a tube stock clamping mechanism 84 and a flaring and necking machine head 85 to perform flaring and necking processing on the rear tube end of the tube stock, and the tube stock clamping mechanism 84 includes an upper clamping die 840, a lower clamping die 841, an upper clamping die cylinder 842 and a lower clamping cylinder 843. The expanding head 85 comprises a transposition cylinder 850, a linear guide 851 and a die cylinder 852, and is provided with an expanding punch and a reducing punch which are arranged up and down, so that the corresponding punch is driven by the transposition cylinder 850 to move on a processing station to perform expanding and reducing processing according to needs. That is, the pipe end processing device 14 mainly performs processing such as expanding and contracting on the rear end of the pipe material, in this embodiment, the processing is performed specifically by adopting a 2-station direct punching mode, the clamping mold is opened up and down, the upper clamping mold cylinder 842 adopts a large cylinder to ensure sufficient clamping force, the lower clamping mold cylinder 843 adopts a small cylinder, and an inclined surface force increasing mechanism is used to ensure that the clamping force of the lower clamping mold is greater than that of the upper clamping mold.

As shown in fig. 17, the traverse robot system 17 has a material clamping claw 86 constructed by a finger cylinder, a lifting cylinder 87 for controlling the material clamping claw 86 to lift in the Z-axis direction, and a traverse driver 87 for driving the material clamping claw 86 to move in the X-axis direction, and in this embodiment, the traverse driver is driven by a servo motor 870 in cooperation with a timing belt 871 to transfer the tube material among the movable drawing clamping die 25, the tube material clamping die mechanism 84, and the tube bending loading and unloading robot system 18. The tube material clamping mechanism 84 constitutes a forming clamp of the forming apparatus of the present embodiment.

As shown in fig. 1 and 2, the bent pipe loading and unloading manipulator system 18 includes a material clamping claw 88, a lifting cylinder 89 for controlling the material clamping claw 88 to lift in the Z-axis direction, an axial movement driver 90 for driving the material clamping claw 89 to move in the Y-axis direction, and a rotary driver for driving the material clamping claw 88 to rotate around the Z-axis direction; the rotary driver is constructed by adopting a rotary cylinder, and the specific structure is that the cylinder body of the lifting cylinder 89 is fixed on the sliding block of the axial movement driver 90, and the cylinder body of the rotary cylinder is fixed on the lifting end of the lifting cylinder 89; the clamping claw 88 is fixed on a rotary output disc of the rotary cylinder through a connecting rod, so that the clamping claw 88 can be driven to lift, move transversely and rotate, the clamping claw can be matched with the transverse manipulator system 17 to feed the pipe bending device, and meanwhile, the pipe bending device can be unloaded.

The process for forming the tee 01 with the structure shown in FIG. 18 by using the tee forming system 1 comprises the following steps:

in the feeding step S1, the flaring device 12 is fed by the feeding device 11.

The specific process is that the straightening unit 21 is adopted to straighten the non-straight pipes such as the coil pipes, the chipless rotary cutting unit 24 is used to cut off the slots at the rotary cutting position of the preset position of the straightened pipes, in the chipless rotary cutting process, two material drawing clamping dies 23 and 24 are adopted to clamp two sides of the cut-off slots, then the movable material drawing clamping die 24 is matched with the fixed material drawing clamping die 23 to draw off the pipes to obtain the short pipes, namely, the feeding step comprises the steps of precutting the cut-off slots on the outer peripheral surface of the long pipes in a chipless rotary cutting mode, and applying a pulling force arranged along the axial direction of the pipes to the outer end parts of the pipes to draw off the pipes from the cut-off slots to obtain the short pipes. In the embodiment, the chipless cutting is carried out by adopting a chipless rolling cutting mode of the blade, the copper pipe is clamped by the clamping die during cutting, the cutting is not completely cut off, and finally the pipe is clamped by the clamping die on the 2 sides and then is broken by pulling, so that the small internal shrinkage of the cut pipe orifice can be ensured.

And a flaring step S2, wherein one end of the tube stock is flared until the inner cavity of the tube can accommodate the next two forming core rods 63 and 64 which are arranged side by side.

And the control station switching mechanism sequentially switches the straight punch 41, the straight punch 42 and the rotary punch to a processing station matched with the position of the movable drawing clamping die 25, and performs flaring treatment on the front end part of the pipe material. In this embodiment, adopt 2 stations vertical strokes and 1 station to revolve the complex mode of punching, carry out flaring to the front end of pipe material to install the chamfer sword on revolving the drift, in order to carry out chamfer processing to the product that is processed, guarantee that the mouth of pipe is smooth. The mode that the servo motor drives the screw rod is adopted for transposition, transposition is rapid, and precision is high.

A molding step S3, as shown in fig. 18, of inserting two molding mandrels 63, 64 arranged in parallel into the pipe portion to be pressed, and adjusting the distance between the two mandrels so as to be widened outward in the outward pulling direction substantially perpendicular to the flattening direction of the pipe; the pipe to be pressed is extruded from two side surfaces by the inner pressing convex die parts 50 and 51 along the flattening direction of the pipe so as to extrude the concave pipe wall structure 010 between the two forming core rods 63 and 64, and in the process of carrying out inner pressure on the pipe wall, the distance between the two core rods is driven to expand so as to extrude the pipe wall of the pipe to be pressed by the two core rods, so that the three-way pipe structure 011 is formed.

In this embodiment, the force source for driving the distance between the two mandrels to be expanded is formed by the extrusion force applied by the inner wall of the inner concave pipe wall structure 010 facing the forming rod part and the driving resultant force applied to the non-forming rod part along the Z-axis direction; and synchronously applying driving resultant force to the non-molding rod part in the process of applying extrusion force to the molding rod part. Of course, the spacing expansion unit may be omitted, and the force source for driving the spacing expansion between the two mandrels is only the extrusion force applied by the inner wall of the inner concave pipe wall structure 010 facing the forming rod part; or the distance expanding unit firstly enables the two core rods to stretch the pipe to be pressed, and the force source for driving the distance between the two core rods to be expanded is only driving resultant force applied to the non-forming rod part along the Z-axis direction. In this embodiment, the force-bearing place on the non-forming rod part is the connecting rod part between the fixing segment of the forming mandrel on the mandrel holder and the forming rod part.

In the present embodiment, the pipe portion to be pressed is a flared pipe portion formed by flaring, that is, in the present embodiment, the cross section of the pipe portion to be pressed is a circular structure due to spinning, and the outward drawing direction is arranged along the Z-axis direction, that is, along the direction of change in the pitch of the two forming mandrels 63, 64.

The three-way pipe forming mainly comprises clamping the front pipe end of a pipe material into 2 holes, as shown in fig. 18, the two holes can be of a structure that side walls 013 and 014 are butted to realize isolation on the cross section, or can be of a structure that the side walls are not butted to form communication on the cross section, the specific structure is arranged according to actual needs, a connecting rod boosting mode is adopted, an air cylinder extends out to push a connecting rod mechanism to enable a left die holder and a right die holder to move towards the middle, an internal pressure male die starts to clamp the pipe, an upper core rod and a lower core rod are pushed to move up and down at the same time, and finally the pipe is formed, namely in the clamping process, the pipe is formed while the core rod moves up and down on two sides. When the die holders 54 and 55 are opened, the upper core rod and the lower core rod are pressed tightly by the springs and pressed on the limiting convex parts 5400 of the core rod holders, and the center distance between the upper core rod and the lower core rod is very small, so that the two core rods can be smoothly inserted into the pipe to be pressed; at the same time of forming, the punching needles 93 and 94 on the three-way pipe forming die can punch 2 positioning concave points on the surface of the pipe. Specifically, punching needles 93 and 94 which synchronously move with an internal pressure male die at a constant speed are matched with female die grooves 630 and 640 arranged on forming core rods 63 and 64, so that more than two positioning concave points are respectively pressed on two sides of a pipe to be pressed; more than one positioning concave point is respectively arranged on each side and beside two sides of the inner concave pipe wall structure 010; in addition, the punching pins 93 and 94 can be replaced by punches fixedly mounted on the die holder, and holes can be punched on the pipe fitting through cooperation with the grooves 630 and 640, so that the function of positioning the concave points can be realized. Wherein the punch pin and the punch each constitute an example of the die in the present embodiment.

In the pipe end processing step S4, the pipe material that is positioned on the movable drawing die and has completed the three-way pipe forming is transferred to the pipe material clamping mechanism 84 by the traverse robot system 17, and pipe end processing is performed.

And a pipe bending step S5, in which the non-flattened end of the pipe is inserted into the material clamping claw 323 of the feeding main shaft 326 by the cooperation of the pipe bending feeding and discharging manipulator system 18 and the traversing manipulator system 17, and the pipe bending device 15 is used for bending the pipe parts 015 and 016 at the bending positions on the pipe according to the preset requirements.

And a discharging step S8, wherein the bent pipe feeding and discharging manipulator system 17 is used for discharging the bent pipe material 01.

The three-way pipe forming system integrates multiple processes of circle correcting and aligning, chipless cutting, pipe end expansion and necking forming, three-way pipe forming, pipe bending and the like of a copper pipe on one device, the middle part of the copper pipe is transferred through the mechanical arm, the occupied space of the device is saved, the number of operators is reduced, the transfer link in the middle of a product is reduced, the processing from raw materials to finished products on one device is realized, and the production efficiency of the product is greatly improved.

In the present embodiment, the pipe bending step 15 is configured to perform post-processing on the pipe having completed the three-way forming process, i.e. one of non-axisymmetric processes, to constitute the post-processing step in the present embodiment, and the pipe bending device 15 is configured to constitute the post-processing device in the present embodiment.

In cooperation with the traverse robot system 17 and the tube bending loading and unloading robot system 18, the tube is driven to move from the tube clamp mechanism 84 to the material clamp 323 of the feeding cart 32, that is, the tube is moved from the forming clamp to the clamping clamp, and is clamped by at least one of the following: a pipe fitting clamping die mechanism 84, a material clamping claw 86, a material clamping claw 88 and a material clamp 323; the "clamp-die clamping state" is a state in which the pipe is clamped during the processing of the pipe, for example, the pipe clamp mechanism 84 and the gripper 323 apply the clamp-die clamping state to the pipe, and the "pipe-clamp clamping state" is a state in which the pipe is clamped during the transfer between two pipe processing apparatuses, for example, the gripper 86 and the gripper 88 apply the pipe-clamp clamping state to the pipe. In the process, relative to the material clamping die, the forming clamping die and the pipe clamp, the pipe can be positioned at a rotation angle around the axis of the pipe, and the axial movement freedom degree of the pipe can be positioned, specifically, the clamping state of the die and the clamping state of the pipe clamp are the clamping states that the rotation freedom degree of the pipe around the axis of the pipe keeps static; and the clamping state of the clamping die and the clamping state of the pipe clamp are the clamping states that the pipe fitting keeps static along the axial moving freedom degree. Of course, in the case that the subsequent processing is non-axisymmetric processing, since the pipe end is relatively easy and accurate to position, the clamping state of the clamping die and the clamping state of the pipe clamp are required to be clamping states in which the rotation angle of the pipe around the axis of the pipe can be positioned, and if the pipe is in a rotatable state on the clamping die or the pipe, the pipe can be positioned only by the rotation angle.

Molding System example 2

As a description of embodiment 2 of the molding system of the present invention, only the differences from embodiment 1 of the molding system will be described below.

Referring to fig. 19, the pressing protrusions 71 and 72 of the distance enlarging unit are used for pressing the gap 61020 between the two mandrel holders 61 and 62 to enlarge the gap, so as to drive the distance between the two forming mandrels 63 and 64 to be enlarged, i.e. in this embodiment, the distance enlarging unit is used for pressing the gap between the two mandrel holders, and in this case, the stress on the non-forming mandrel portion is the fixing section of the forming mandrel on the mandrel holder.

Referring to the structure shown in fig. 1, for the traverse robot system 17 and the tube bending loading and unloading robot system 18, the traverse robot system 17 may be added with a degree of freedom of movement in the Y-axis direction to form a three-dimensional traveling mechanism, so as to drive the material clamping claw 86 to move in a three-dimensional space relative to the frame 10, thereby eliminating the tube bending loading and unloading robot system 18.

Embodiment of the Molding apparatus

In the above description of the embodiment of the molding system, the structure of the molding apparatus of the present invention has been exemplarily described, and is not repeated herein.

In the present invention, the "non-axisymmetric processing" is configured such that the machined and formed partial structure is not symmetrical with respect to the central axis of the part of the pipe, for example, a pipe bending processing, a hole forming processing such as side punching, punching and flanging, and a pipe end shaping processing such as pipe end flattening, and preferably, in the above embodiment, the "non-axisymmetric processing" preferably includes at least one of a pipe bending processing, a hole forming processing, and a pipe end shaping processing. The number of the non-axisymmetric processing devices can be more than two, and the preferable scheme is that all the post-processing devices are non-axisymmetric processing devices.

For the resetting mechanism of the mandrel seat, not only a compression spring can be adopted for construction, but also a tension spring can be adopted for construction, and two permanent magnet pairs which are oppositely arranged in the same pole can also be adopted for construction.

The "outward-expandable adjustment of the distance between the two forming mandrels" is configured to expand the distance between the two forming mandrels under the driving force without damaging the structure of the equipment, and preferably to expand the distance between the two forming mandrels under the external force, which is a force from outside the equipment, such as a human thrust force, without damaging the structure of the equipment; the "forming rod portion" in the mandrel is the portion that contacts the pipe, while the "non-forming rod portion" is the portion that does not contact the pipe.

The utility model discloses a main design sets the two interval adjustable through the position relation with two shaping plug including the internal pressure forming process to, and along with going on of internal pressure forming process, and constantly enlarges to can realize prior art in same process flattening step and interior pressure forming step. According to the present concept, the feeding step, the flaring step and the tube bending step are not limited to the processes disclosed in the above embodiments, but are only some embodiments, and there are many obvious variations without departing from the concept of the present invention; similarly, the feeding device, the flaring device, the pipe end processing device and the pipe bending device are not limited to the structures disclosed in the above embodiments, but are only some embodiments, and there are many obvious variations without departing from the concept of the present invention.

Claims (10)

1. A three-way pipe forming device comprises a pipe material clamping die and a forming unit, wherein the forming unit comprises a male die extrusion unit and a forming core rod unit; the male die extrusion unit comprises a first internal pressure male die and a second internal pressure male die which are oppositely arranged, and a die pressing feeding unit which is used for driving the two internal pressure male dies to relatively move along the tube flattening direction so as to extrude the tube part to be pressed; the forming mandrel unit comprises an installation seat and two forming mandrels which are arranged on the installation seat in parallel; the method is characterized in that:

each forming core rod is fixed on a core rod seat, the core rod seat can be movably installed on the installation seat along the distance changing direction between the two forming core rods, and the distance changing direction is approximately perpendicular to the tube flattening direction.

2. The molding apparatus as defined in claim 1, wherein:

and the mounting seat is provided with a resetting mechanism, and the elastic resetting force of the resetting mechanism forces the distance between the two forming core rods to be reduced.

3. The molding apparatus as defined in claim 2, wherein:

the resetting mechanism comprises a compression spring, one end of the compression spring is pressed against the mandrel seat, and the other end of the compression spring is pressed against the mounting seat;

in the distance changing direction, the mandrel seat is abutted against the limiting stop mechanism, so that the mandrel seat is stopped and positioned in the resetting process.

4. The molding apparatus as defined in claim 1, wherein:

the forming mandrel unit comprises a distance expanding unit for driving the two forming mandrels to expand in the distance change direction; the distance enlarging unit applies a distance enlarging force to the mandrel holder or the non-molding rod portion of the molding mandrel.

5. The molding apparatus as defined in claim 4, wherein:

the interval expanding unit and the mould pressing feeding unit share the same driving unit;

the interval expansion unit comprises an extrusion convex part fixed on the inner side part of the die holder of the internal pressure convex die; the extrusion bulge comprises two wedge-shaped surfaces which are arranged at an included angle and are used for extruding a gap between the two mandrel seats and/or a gap between the non-forming mandrel parts of the two forming mandrels.

6. The molding apparatus as defined in any one of claims 1 to 5, wherein:

the die pressing feeding unit comprises a base, a die holder for fixing the internal pressure male die, a linear displacement output device for outputting displacement and a force amplification and conversion mechanism, wherein the linear displacement output device is arranged along the axial direction of the core rod; the base comprises a bottom plate, two support plates and two guide rods, wherein the plate surface of the two support plates is arranged in parallel to the interval change direction and fixedly arranged on the bottom plate, the two guide rods are arranged along the tube flattening direction, and the end parts of the two guide rods are fixedly supported on the two support plates; two guide holes arranged on the die holder are correspondingly sleeved outside the two guide rods, so that the die holder can be clamped between the two support plates in a reciprocating manner along the tube flattening direction; the force amplification conversion mechanism comprises a slide block and two force-increasing connecting rods; the sliding block is mounted on the base in a manner of axially sliding along the mandrel; the swing ends of the two force-increasing connecting rods are hinged, the fixed end of one force-increasing connecting rod is hinged with the outer side part of the sliding block, the fixed end of the other force-increasing connecting rod is hinged with the outer side part of the die holder, and the fixed end of the other force-increasing connecting rod and the fixed end of the die holder form a V-shaped force-increasing mechanism with an acute included angle and a swing end protruding outwards; and a rotor of the linear displacement output device is fixedly connected with the sliding block.

7. The molding apparatus as defined in any one of claims 1 to 5, wherein:

the mandrel seat can drive the distance between the two forming mandrels to be enlarged and adjusted under the action of external force.

8. The molding apparatus as defined in any one of claims 1 to 5, wherein:

and a stamping die is fixedly arranged on the inner side surface of the die holder of the internal-pressure male die, and female die grooves matched with the stamping die are respectively arranged on two sides of the core rod.

9. A three-way pipe forming system comprises a feeding device, a flaring device, a forming device and a material moving system for sequentially moving pipe materials among the devices; the method is characterized in that:

the molding apparatus according to any one of claims 1 to 8.

10. The molding system of claim 9, wherein:

the feeding device comprises a chipless rotary cutting machine head, a fixed drawing clamp die, a movable drawing clamp die and a drawing driver, wherein the drawing driver is used for driving the movable drawing clamp die to axially reciprocate relative to the fixed drawing clamp die along a rotary main shaft of the chipless rotary cutting machine head; and along the axial direction of the rotating main shaft, the movable material drawing clamping die is positioned at the cutting end side of the chipless rotary cutting machine head, and the fixed material drawing clamping die is positioned at the other end side.

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