CN109079520B

CN109079520B - Manufacturing equipment for EC (electric control) connecting pipe or electronic expansion valve connecting pipe

Info

Publication number: CN109079520B
Application number: CN201810653473.XA
Authority: CN
Inventors: 张良; 段冰
Original assignee: Zhejiang Heliang Intelligent Equipment Co ltd
Current assignee: Zhengjiang Changxing Heliang Intelligent Equipment Co Ltd
Priority date: 2018-06-22
Filing date: 2018-06-22
Publication date: 2021-03-23
Anticipated expiration: 2038-06-22
Also published as: CN109079520A

Abstract

The invention relates to a manufacturing device of an EC (ethylene-propylene-diene monomer) connecting pipe or an electronic expansion valve connecting pipe, belonging to the technical field of pipe processing. The manufacturing equipment comprises a frame, a pipe section feeding system and a processing and forming system for processing the pipe section into a connecting pipe; the pipe section feeding system comprises more than two groups of pipe section feeding units which are arranged in parallel; the pipe section feeding unit comprises a coil pipe straightening unit and a chipless rotary cutting unit, and the chipless rotary cutting unit is used for cutting the long pipe straightened by the coil pipe straightening unit into pipe sections; the machine-shaping system includes a pipe end processing unit that performs pipe end processing on at least one end of the cut pipe section; the frame is provided with a material moving system which is used for sequentially moving more than two groups of pipe section feeding units which are arranged in parallel to the pipe end processing units at the same time according to the position arrangement sequence of the chipless rotary cutting units. The manufacturing equipment has high automation degree, effectively improves the production efficiency and flexibility, and can be widely applied to the technical field of manufacturing of air conditioners, automobiles and the like.

Description

Manufacturing equipment for EC (electric control) connecting pipe or electronic expansion valve connecting pipe

Technical Field

The invention relates to a processing and forming device of a pipe fitting, in particular to a manufacturing device of an EC (EC) connecting pipe or an electronic expansion valve connecting pipe.

Background

An electronic expansion valve is used as a main element of an air conditioner, and is a throttling element which can adjust the flow of refrigerant entering a refrigerating device according to a preset program.

According to the shape, the connecting pipe comprises a straight pipe-shaped connecting pipe and a bent pipe-shaped connecting pipe, such as an electronic expansion valve disclosed in the patent document with the publication number of CN207111959U, and as shown in the attached figure 3, the connecting pipe comprises a straight pipe-shaped connecting pipe 102 and a bent pipe-shaped connecting pipe 103, and the outer end parts of the two connecting pipes are both in flaring end structures; as shown in fig. 2 of the accompanying drawings, the connecting pipe of the electronic expansion valve disclosed in patent document CN103836211A includes a straight pipe-shaped connecting pipe 13 and a bent pipe-shaped connecting pipe 14, wherein an inner end of the connecting pipe 13 is of a flared end structure, and an inner end of the connecting pipe 14 is of a tapered end structure; for some connecting pipes, one of the two ends of the connecting pipe is of a flaring end structure, and the other end of the connecting pipe is of a necking end structure, or both the two ends of the connecting pipe are of flaring end structures.

In addition, the four-way valve is used as a main element of a refrigeration device, is used for controlling the switching between a heat cycle and a refrigeration cycle, and is provided with an E connecting pipe, an S connecting pipe and a C connecting pipe, and the specific structure of the four-way valve is disclosed in patent documents with the publication number of CN101324277A, the publication number of CN201391635Y and the like.

When manufacturing the above-mentioned connecting pipes with various structures, a cutting device is usually adopted to cut a long pipe into fixed-length pipe sections, and then the fixed-length pipe sections are conveyed to a pipe section processing unit to be fed so as to process the pipe end of more than one of the two ends according to a predetermined structure; for a bent pipe-shaped connecting pipe in the electronic expansion valve, the pipe section after pipe end treatment needs to be conveyed to a pipe bending machine for pipe bending treatment, so that the automation degree of the whole treatment process is low, and the processing efficiency is low.

Disclosure of Invention

The invention mainly aims to provide equipment for manufacturing an EC (ethylene-propylene-diene monomer) connecting pipe or an electronic expansion valve connecting pipe, so that the production efficiency of the connecting pipe is improved while the automation degree of the connecting pipe production is improved.

In order to achieve the main purpose, the manufacturing equipment provided by the invention comprises a rack, a pipe section feeding system and a processing and forming system, wherein the pipe section feeding system is arranged on the rack; the pipe section feeding system comprises more than two groups of pipe section feeding units which are arranged in parallel; the pipe section feeding unit comprises a coil pipe straightening unit and a chipless rotary cutting unit, and the chipless rotary cutting unit is used for cutting the long pipe straightened by the coil pipe straightening unit into pipe sections; the machine-shaping system includes a pipe end processing unit that performs pipe end processing on at least one end of the cut pipe section; the frame is provided with a material moving system which is used for sequentially moving more than two groups of pipe section feeding units which are arranged in parallel to the pipe end processing units at the same time according to the position arrangement sequence of the chipless rotary cutting units.

The coil pipe straightening unit and the chipless rotary cutting unit are arranged in the feeding system, so that the coil pipe is straightened into a long pipe material, and then the long pipe material is cut into short pipe sections with preset lengths and cleanness, the generation of chips is effectively reduced, the cleanness of a production environment is kept, the preset length of the short pipe sections can be adjusted in real time according to the production working condition while the automation degree and the production efficiency of the manufacturing equipment are improved, and the flexibility of the manufacturing equipment is effectively improved; more than two groups of pipe section feeding units which are arranged in parallel are matched with the processing and forming system in parallel, so that the difference of the processing speed between the feeding system and the processing and forming system can be effectively matched, and the production efficiency is improved; and the pipe ends synchronously cut each time are transferred to the processing unit for processing according to the arrangement sequence of the chipless rotary cutting units by the matching of the pipe transfer system, so that automatic connection is established among the units, the working procedures of manual carrying and the like are reduced, and the production efficiency of the manufacturing equipment is effectively improved.

The pipe end processing unit comprises a pipe section clamping die, a first pipe end processing machine head and a second pipe end processing machine head, wherein the first pipe end processing machine head and the second pipe end processing machine head are positioned at two sides of the pipe section clamping die, and the processing sides of the first pipe end processing machine head and the second pipe end processing machine head face to the pipe section clamping die; the axial direction of the main shaft of the pipe end processing machine head is vertical to the axial direction of the rotary main shaft of the chipless rotary cutting unit. The pipe end processing unit is arranged to comprise a middle clamping die and machine heads positioned on two sides of the clamping die, so that one end part of the pipe section can be subjected to pipe end processing according to needs while the same clamping die is shared, or the two end parts of the same pipe section are subjected to pipe end processing simultaneously or sequentially, and the use adaptability and flexibility of the pipe end processing unit are effectively improved. The rotary main shaft of the machine head is axially arranged to be perpendicular to the axial direction of the chipless rotary cutting main shaft, so that the overall structure layout is effectively optimized.

The other specific scheme is that the material moving system comprises a stepping material distributing unit and a pipe moving manipulator unit; the stepping material distribution unit comprises a middle trough plate, side trough plates arranged on two sides of the middle trough plate respectively, and a stepping driving unit; one of the middle trough plate and the side trough plates is provided with a first material supporting trough, a second material supporting trough and a third material supporting trough which are arranged at equal intervals along the material moving direction at a first interval, the other one of the middle trough plate and the side trough plates is provided with a fourth material supporting trough and a fifth material supporting trough which are arranged at the first interval along the material moving direction, and the length of each material supporting trough is arranged along the direction perpendicular to the material moving direction; the stepping driving unit comprises a lifting driving unit for driving the other lifting driving unit to move relative to the other lifting driving unit and a traveling driving unit which reciprocates along the material moving direction. The stepping units are constructed in the pipe moving system, so that the matching of the feeding system and the processing and forming system in the processing time can be better realized, and the pipe sections generated by the rotary cutting units can be sequentially supplied to the pipe end processing unit according to the arrangement sequence of the chipless rotary cutting units.

The more specific scheme is that the axial line spacing of the rotating main shafts of two adjacent chipless rotary cutting units is equal to a first spacing, and the material moving direction is parallel to the axial direction of the rotating main shafts; the pipe moving manipulator unit comprises a first pipe moving manipulator unit which is used for moving a pipe section from a clamping die of the chipless rotary cutting unit to the stepping distributing unit; the first pipe moving manipulator unit comprises a mounting seat, a first clamping claw and a second clamping claw which are arranged on the mounting seat at a first distance, a transferring sliding seat which is driven by a transferring driving device and can reciprocate along the material moving direction, a lifting mechanism which drives the mounting seat to lift relative to the transferring sliding seat, and a rotating mechanism which drives the mounting seat to rotate relative to the transferring sliding seat around a vertical shaft; the number of the middle groove plates is more than two and the middle groove plates are arranged at intervals to form the one; and a pipe section positioning mechanism is arranged beside the third material supporting groove and comprises a positioning rod arranged on one groove side and a material pushing rod arranged on the other groove side. Based on the structural design of the mechanical arm and the size configuration between and inside the functional units, the first pipe moving mechanical arm unit can convey the pipe sections cut by more than two rotary cutting units to the stepping unit at one time, and the pipe sections are sequentially arranged on the stepping unit at one time.

The further proposal is that the number of the pipe section feeding units is two, and the number of the middle groove plates is two.

The pipe moving manipulator unit comprises a second pipe moving manipulator unit which moves the pipe section from the stepping material distributing unit to the processing and forming system and moves the pipe section among the processing units in the processing and forming system according to the processing procedure sequence; the second pipe moving manipulator unit comprises a synchronous transfer sliding seat which is driven by the transfer driving device and can reciprocate along the material transfer direction, and a plurality of manipulators fixedly arranged on the synchronous transfer sliding seat; the number of manipulators is equal to the number of processing units; the manipulator comprises a clamping claw, a mounting seat fixedly arranged on the synchronous transfer sliding seat and a lifting mechanism for driving the clamping claw to lift relative to the mounting seat; the distance between two adjacent installation bases is equal. Based on the manipulators arranged at equal intervals, the short pipe sections on the corresponding stations can be synchronously clamped and transferred, namely, the short pipe sections on all the stations are synchronously clamped and transferred and synchronously placed on the next station, so that the working efficiency is improved, and the driving system and the control method are simplified.

Preferably, the processing and forming system comprises a pipe bending unit located at the downstream of the pipe end processing unit along the moving direction of the pipe section; the pipe bending unit comprises a pipe bending machine head, a core rod unit and a discharging unit; the pipe bending machine head comprises a clamping die, a round die and a swing arm; the mandrel unit comprises a mandrel and a mandrel driving mechanism for driving the mandrel to extend into or withdraw from the pipe section; the discharging unit comprises a pushing sleeve sleeved outside the core rod and a pushing driving device used for driving the pushing sleeve to reciprocate along the axial direction of the core rod. The discharging unit is arranged to comprise a material pushing sleeve sleeved outside the core rod, so that the discharging process is convenient to realize, and the integral structure of the equipment can be simplified.

The more preferable scheme is that a guide plate is fixedly arranged on the fixed end part of the swing arm, the guide plate is vertically positioned between the circular die and the swing arm, and the guide plate comprises an inclined base plate with an avoidance opening matched with the mounting seat of the circular die; when the clamping die cavity of the clamping die is axially arranged along the axial direction of the core rod, the inclined substrate is obliquely arranged downwards along the direction of the round die departing from the core rod driving mechanism, and flanges are fixedly arranged on the edge part of the inclined substrate facing the clamping die and the edge part of the inclined substrate facing the core rod driving mechanism. By additionally arranging the material guide plate, the pipe section can be prevented from falling onto the swing arm to interfere the clamping action of the clamping die or falling into a gap between the swing arm and the headstock to interfere the subsequent pipe bending operation during the discharging process, and the reliable operation of the whole automatic treatment process is effectively ensured.

Another preferred embodiment is that the processing and forming system includes a pipe section positioning unit located between the pipe end processing unit and the pipe bending unit along the transfer direction of the pipe section, and the pipe section positioning unit includes a material holding groove, a positioning rod disposed on one groove side, and a material pushing rod disposed on the other groove side. The precision of the bent pipe is effectively ensured, and meanwhile, the mechanism structure for realizing the front positioning of the bent pipe is simplified.

Drawings

FIG. 1 is a perspective view of an embodiment of the present invention;

FIG. 2 is a block diagram of the schematic architecture of an embodiment of the present invention;

FIG. 3 is an enlarged view of a portion A of FIG. 1;

FIG. 4 is an enlarged view of a portion B of FIG. 1;

FIG. 5 is an enlarged view of portion C of FIG. 1;

FIG. 6 is a perspective view of a die clamping device on the tube end processing unit in an embodiment of the present invention;

FIG. 7 is a perspective view of the pipe end spinning unit of the embodiment of the present invention with the die clamping device omitted;

FIG. 8 is a perspective view of the pipe end straight punching unit in the embodiment of the present invention, with the die clamping device omitted;

FIG. 9 is an enlarged view of portion D of FIG. 1;

FIG. 10 is an enlarged view of E in FIG. 1;

FIG. 11 is a schematic view showing the state of the pipe bending unit in the embodiment of the present invention when the clamping die is opened after the pipe bending is completed;

FIG. 12 is a schematic view of the elbow unit in an example of the invention in a unloaded state;

FIG. 13 is an enlarged view of portion F of FIG. 11;

fig. 14 is a perspective view of the stepping material distributing unit in the first state according to the embodiment of the present invention;

FIG. 15 is a perspective view of the step distributing unit in the second state according to the embodiment of the present invention;

fig. 16 is a perspective view of a tube-moving robot unit in an embodiment of the present invention;

FIG. 17 is a schematic view of a tube segment cut during the manufacture of a tube according to an embodiment of the present invention;

FIG. 18 is a schematic structural diagram of a pipe section after pipe end treatment in a process of manufacturing a connecting pipe according to an embodiment of the present invention;

fig. 19 is a schematic structural diagram of a pipe section after pipe end processing in a process of manufacturing a connecting pipe according to an embodiment of the present invention.

Detailed Description

The invention is further illustrated by the following examples and figures.

Examples

In the following embodiments, the present invention is exemplified by manufacturing an elbow type nozzle on an electronic expansion valve.

Referring to fig. 1 and 2, the manufacturing apparatus 1 of the present invention includes a control unit, a frame 100, a pipe section feeding system 11 mounted on the frame 100, a processing and forming system 15, a material moving system for feeding the pipe sections cut by the pipe section feeding system 11 to the processing and forming system 15 according to a predetermined program, and an aggregate unit 19 for collecting the connecting pipes processed by the processing and forming system 15. The control unit comprises a processor, a memory and a control panel 101, wherein the control panel 101 is used for receiving a control instruction input by an operator, the processor executes a program corresponding to the control instruction in the memory, and the processor sequentially carries out pipe cutting, transferring, processing and forming processing so as to manufacture a desired electronic expansion valve connecting pipe.

The pipe section feeding system 11 includes two sets of pipe section feeding units arranged in parallel, namely a pipe section feeding unit 12 and a pipe section feeding unit 13, the pipe section feeding unit 12 includes a long pipe feeding unit 121 and a chipless rotary cutting unit 122 for cutting the long pipe material to be fed into a fixed length pipe section, and the pipe section feeding unit 13 includes a long pipe feeding unit 131 and a chipless rotary cutting unit 132 for cutting the long pipe material to be fed into a fixed length pipe section.

The long

pipe feeding units

121 and 131 respectively and sequentially include a coil mounting frame (not shown), coil straightening units 21 and 23, and

feeding units

22 and 24 along the traveling direction of long pipe feeding, i.e. along the positive direction of the X axis in the figure. The coil material arranged on the coil mounting frame is straightened into a straight tube material through the extrusion of a plurality of groups of straightening rollers on the coil straightening unit. In the present embodiment, the

feeding units

24 and 22 are symmetrically arranged with respect to a first plane, which is parallel to plane OXZ, and feed the corresponding chipless rotary cutting units synchronously during feeding.

As shown in fig. 1 and 3, the feeding unit 22 includes two guide rods 221 arranged along the X-axis direction, an up-and-down opening-and-closing type clamping die 222 slidably mounted on the guide rods 221, and a linear displacement output device 223 driving the clamping die 222 to reciprocate along the guide rods 221. The feeding unit 24 includes two guide rods 241 arranged along the X-axis direction, an up-and-down opening-closing type clamping die 242 slidably mounted on the guide rods 241, and a linear displacement output device 243 for driving the clamping die 242 to reciprocate along the guide rods 241.

For the two feeding units, the opening and closing driving device of the clamping die and the sliding driving device sliding along the guide rod can share the same set of driving device, and the driving device can also be independently adopted for driving. In this embodiment, the clamping die 222 and the clamping die 242 share the same set of opening and closing driving device and the same set of transfer driving device. As shown in fig. 3, the mold clamping opening and closing driving device includes a slide base 27 fixed on a slide block cooperating with a guide bar, two support blocks 281 fixed on the slide base 27, and an opening and closing cylinder 25 supported and fixed on the support blocks 281 by a cross plate 282. The lower clamping die of the two clamping dies is fixed on the sliding seat 27, and the upper clamping die is fixed on the piston rod of the opening and closing cylinder 25 through the clamping die holder 283, so that the two clamping dies are synchronously driven to be synchronously opened and closed, and two straightened long pipes are synchronously clamped or released. The transfer driving device comprises a servo motor and a feed screw nut mechanism in transmission connection with a rotor shaft of the servo motor, and a feed screw nut of the feed screw nut mechanism is fixedly connected with the sliding seat 27. The two feeding clamping dies are synchronously driven based on the same set of conveying driving device and opening and closing driving device, so that the using amount of parts can be reduced, and straightened long pipe materials can be synchronously supplied to the two chipless rotary cutting units.

As shown in fig. 1, 2 and 5, the rotating spindles of the chipless rotary cutting unit 122 and the chipless rotary cutting unit 132 are arranged along the X-axis direction, and the distance between the rotating spindles is a first distance, and a remaining pipe clamping unit 29 is disposed on one side of the rotating spindle mounting seat adjacent to the feeding unit. In this embodiment, the structure of the remaining tube clamping unit 29 is the same as that of the feeding unit, so as to synchronously clamp the two long tubes during the cutting process and open the two long tubes during the feeding process of the feeding unit, so as to support and guide the two long tubes to smoothly enter the inner hole of the rotary spindle of the chipless rotary cutting unit. And cutting clamping dies 1220 and 1320 which are opened and closed in the Y-axis direction are fixedly arranged on one side of the rotating main shaft, which is far away from the residual pipe part clamping die unit 29, and the cutting clamping dies 1220 and 1320 are respectively composed of two movable clamping dies which synchronously move in opposite directions.

As shown in fig. 1 and 2, the processing and forming system 15 sequentially includes a pipe end processing unit 16, a pipe positioning unit 17, and a pipe bending unit 18 along the traveling direction of the pipe section, wherein the pipe end processing unit sequentially includes a pipe end rotary punching unit 161 and a pipe end straight punching unit 162 along the traveling direction of the pipe section processing process.

Referring to fig. 6 and 7, the pipe end spinning unit 161 includes a pipe segment clamping die 31, and a first pipe end processing head 32 and a second pipe end processing head 33 which are located on both sides of the pipe segment clamping die 31 and have processing sides facing the pipe segment clamping die 31, and the rotating main shafts of the first pipe end processing head 32 and the second pipe end processing unit 33 are arranged along the Y-axis direction. The pipe section clamping die 31 comprises a sliding groove seat 310 fixed on the machine frame 100, a left clamping die seat 311 and a right clamping die seat 312 which are slidably mounted on the sliding groove seat 310 along the X-axis direction, a left clamping die 313 fixed on the left clamping die seat 311, a right clamping die 314 fixed on the right clamping die seat 312, a wedge-shaped push block arranged in a sliding groove cavity 3100 of the sliding groove seat 310, and a clamping die driver 315 for driving the wedge-shaped push block to reciprocate along the Z-axis direction. The mold clamping driver 315 may be a linear displacement output device such as a cylinder, a linear motor, or the like, and the cylinder is specifically selected in this embodiment.

The sliding groove seat 310 is provided with a cross sliding groove 3100 arranged along the X-axis direction, and the left and right die clamping seats are slidably mounted on the sliding groove seat 310 through a cross sliding block matched with the sliding groove 3100. Two pushing grooves which are parallel to the XOZ plane and form a V-shaped structure are arranged on the wedge-shaped pushing block; and the left and right die clamping bases are provided with sliding blocks matched with the pushing grooves, so that in the process of pushing the wedge-shaped pushing block to reciprocate along the Z axial direction through the die clamping driver 315, the left and right die clamping bases are synchronously pushed to move along opposite directions in the Y axial direction, and the pipe fitting is clamped by closing or released by opening.

The first pipe end processing head 32 is an expanding device, the second pipe end processing unit 33 is a necking device, in the pipe end processing process, the expanding processing and the necking processing are simultaneously carried out on the two ends of the pipe section clamped on the pipe section clamping die 31 through the expanding die 320 and the necking die 330, and chamfering blades synchronously driven by the rotating main shafts of the expanding die 320 and the necking die 330 are arranged beside the expanding die and the necking die, so that the two ends of the pipe section are synchronously chamfered in the rotary punching process.

As shown in fig. 8, the pipe-end direct punching unit 162 includes a pipe segment clamping die 31, and a first pipe-end processing head 34 and a second pipe-end processing head 35 which are located on both sides of the pipe segment clamping die 31 and have processing sides facing the pipe segment clamping die 31, and driving spindles of the first pipe-end processing head 34 and the second pipe-end processing unit 35 are arranged along the Y-axis direction. The first pipe end processing head 34 and the second pipe end processing unit 35 are both flaring devices, and in the pipe end processing process, the flaring processing is simultaneously performed on both ends of the pipe section clamped on the pipe section clamping die 31 through the flaring die 340 and the flaring die 350. And configuring the configuration and the number of the flaring machine heads and the necking machine heads of the plurality of sub-units in the pipe end processing unit according to actual requirements.

As shown in fig. 9, the pipe section positioning unit 17 includes a support 40, a material holding groove 41, a positioning rod 42 disposed on one side of the material holding groove 41 in the groove length direction, a material pushing rod 43 disposed on the other side of the groove length, and a material pushing driving device 44 for pushing the material pushing rod 43 to reciprocate in the Y axis direction. The material pushing driving device can select linear displacement output devices such as a linear motor, an air cylinder and an oil cylinder, and specifically selects a material pushing air cylinder in the embodiment.

The material supporting groove 41 is composed of two groove plates 411 provided with V-shaped positioning grooves 410, the two groove plates 411 are spaced at a certain distance in the Y-axis direction, the groove plates 411 are fixed on the rack 100 through a support 40, and the positioning rod 42 is adjustably mounted on the support 40 in the Y-axis direction. On the bracket 40, a guide rod mechanism composed of a guide rod 47 and a sliding bearing 45 is fixedly arranged at two sides of the pushing drive device 44, a connecting plate 46 is fixedly arranged at the front end of the guide rod 47, the pushing rod 43 is fixed on the front end surface of the connecting plate 46, the stator of the pushing drive device 44 is fixed on the bracket 40, and the mover is fixedly connected with the connecting plate 46, so that the end surface of the pipe section arranged in the positioning groove 410 is pushed to abut against the positioning rod 42, and the positioning of the pipe section in the Y-axis direction is realized. Wherein the positioning groove 410 is arranged in the Z-axis direction near the groove side of the tube-end processing unit 16, and the other groove side is arranged obliquely to facilitate the taking of the material after the tube segment is positioned. A material detection sensor for detecting whether the material exists in the positioning groove 410 is installed beside the side of the groove plate 411, wherein the material detection sensor can be a proximity switch, a shielding type photoelectric sensor or a diffuse reflection type photoelectric sensor, and in the embodiment, a laser sensor is specifically selected; the material detecting sensor outputs a detecting signal to the control unit, and the control unit controls the pipe section positioning unit 17 to position the pipe material according to whether the material exists or not, and is used as one of judging signals for controlling the second pipe moving manipulator unit to take the material from the material supporting groove.

Referring to fig. 10 to 13, the tube bending unit 18 includes a tube bending head 51, a mandrel unit 52, a discharging unit 53, and a guide plate 6. The pipe bending machine head 51 comprises a clamping die 510, a round die 511, a guide die 512 and a swing arm 513. The swing arm 513 and the circular die 511 are driven by the same driving main shaft to synchronously rotate around the axis of the main shaft; the clamp mold 510 is driven by a clamp mold driving mechanism 5101, is mounted on the swing arm 513 so as to be reciprocated between a pipe clamping position and a pipe releasing position, and clamps a pipe to be bent or releases the pipe after the pipe bending is completed by cooperating with the circular mold 511.

The mandrel unit 52 includes a holder 520, a mandrel 521 arranged in the Y-axis direction, and a mandrel driving mechanism 522 for driving the mandrel 521 to extend into or retract from the pipe segment. The mandrel driving mechanism 522 may be a linear displacement output device such as a linear motor, an air cylinder, and an oil cylinder, and in this embodiment, a mandrel air cylinder is specifically used.

The discharging unit 53 includes a bracket 530, a pushing sleeve 531 sleeved outside the core rod 521, and a pushing driving device 532 for driving the pushing sleeve 531 to reciprocate along the Y axis. The material pushing driving device can select linear displacement output devices such as a linear motor, an air cylinder and an oil cylinder, and specifically selects a material pushing air cylinder in the embodiment. On the bracket 530, a guide rod mechanism composed of a guide rod 533 and a sliding bearing 534 is fixedly arranged at two sides of the pushing drive device 532, a connecting plate 535 is fixedly arranged at the front end of the guide rod 533, a pushing sleeve 531 is fixed on the front end surface of the connecting plate 535, a stator of the pushing drive device 532 is fixed on the bracket 530, and a mover is fixedly connected with the connecting plate 535.

A support base is fixed in front of the discharging unit 53, and a guide pipe 55 arranged along the Y-axis direction is fixed on the support base. In the working process, the mandrel driving mechanism 522 pushes and pulls the mandrel 521 which sequentially passes through the material pushing sleeve 531 and the guide pipe 55 to extend into the pipe section to be bent, so as to perform auxiliary bending on the pipe section to be bent. After the pipe bending process is completed, the pushing material driving device 532 drives the pushing material sleeve 531 to move along the axial direction of the core rod 521 so as to push the pipe material out of the end of the core rod 521 and drop the pipe material onto the material guiding plate 6, and slide along the surface of the inclined base plate 60 into the material collecting unit 19 to be collected. In this embodiment, the collecting unit 19 includes a material guide plate 190 as shown in fig. 10 and a movable collecting basket disposed below the material guide plate 190.

The guide plate 6 is fixedly arranged on the fixed end part of the swing arm 513 between the circular die 511 and the swing arm 513 in the Z-axis direction, and the guide plate 6 comprises an inclined base plate 60 with an avoidance port 63 matched with the mounting seat 5110 of the circular die 511. When the clamping die 510 swings along with the swing arm 513 to the position that the clamping die cavity is axially arranged along the axial direction of the mandrel 531, the clamping die cavity is axially parallel to the guide die cavity of the guide die 512 at the moment and is axially arranged along the Y direction, namely, the clamping die cavity and the guide die cavity are both positioned at the position to be used for clamping the pipe material before the pipe bending; at this time, in the negative direction of the Y axis, that is, in the direction of the circular mold 511 away from the mandrel driving mechanism 522, the inclined substrate 60 is arranged to be inclined downward, so that the adapter tube pushed down by the material pushing sleeve 531 can slide along the inclined substrate 60 and fall into the material collecting unit 19, and the inclined substrate 60 is fixedly provided with a flange 61 on the edge portion facing the clamping mold 510 and a flange 62 on the edge portion facing the mandrel driving mechanism 522, so as to stop and guide the sliding process of the adapter tube on the inclined substrate 60 and slide according to a desired path.

Referring to fig. 1, 2, 4 and 14 to 16, the material moving system includes a stepping material distributing unit 14 and a pipe moving manipulator unit 10. The step material distributing unit 14 includes a bracket 70, two middle slot plates 71, side slot plates 72 respectively disposed at both sides of the middle slot plates 71, and a step driving unit. The pipe transfer robot unit 10 includes a first pipe transfer robot unit 8 for transferring the pipe segments from the clamping dies 1220 and 1320 of the chipless rotary cutting unit to the step-by-step material distribution unit 14, and a second pipe transfer robot unit 9 for transferring the pipe segments from the step-by-step material distribution unit 14 to the processing system and sequentially transferring the pipe segments among the processing units in the processing system in order of the processing steps.

In the step-by-step material distributing unit 14, a first material supporting groove 710, a second material supporting groove 711 and a third material supporting groove 712 which are arranged at equal intervals along the X-axis direction at the first interval are arranged on the middle trough plate 71, a fourth material supporting groove 720 and a fifth material supporting groove 721 which are arranged at the first interval along the Y-axis direction are arranged on the side trough plate 72, and the groove lengths of the five material supporting grooves are arranged along the Y-axis direction and are all in a V-shaped positioning groove structure; in this embodiment, the X-axis constitutes the direction of movement of the stepped powdering unit 14.

The step driving unit includes a lifting driving unit 73 for driving the two side groove plates 72 to reciprocate between the low position and the high position in the Z-axis direction in synchronization, and a traveling driving unit 74 for driving the two side groove plates 72 to reciprocate between the front position and the rear position in the X-axis direction.

In the present embodiment, the travel driving unit 74 includes a slide plate holder 740 and linear displacement output devices 741, the slide plate holder 740 is slidably mounted on the support 70 along the X-axis direction by a rail-slide mechanism, and the stators of the linear displacement output devices 741 are fixed on the support 70 and are two in number, and are used for pushing the slide plate holder 740 to reciprocate along the X-axis direction. The lifting driving unit 73 includes a lifting plate 730 slidably mounted on the sliding plate base 740 along the Z-axis direction and a linear displacement output device 731 for pushing the lifting plate 730 to reciprocate along the Z-axis direction, the two side slot plates 72 are fixed on the lifting plate 730, and the middle slot plate 71 is fixed on the bracket 70. The linear

displacement output devices

741 and 731 can be linear motors, air cylinders, oil cylinders, and the like, and in this embodiment, oil cylinders are specifically selected.

By the combined driving of the lifting driving unit 73 and the advancing driving unit 74, that is, the driving side trough plate 72 moves in two-dimensional space in the XOZ plane relative to the middle trough plate, when the side trough plate 72 is located at the aforementioned low position, the upper plate surface of the side trough plate is lower than the lower edges of the pipe sections lifted on the first material supporting trough 710, the second material supporting trough 711 and the third material supporting trough 712; when the side trough plate 72 is located at the high position, the lower edges of the upper pipe sections of the fourth material supporting trough 720 and the fifth material supporting trough 721 are higher than the upper plate surface of the middle trough plate 71; when the side chute plate 72 is located at the aforementioned front position, the fifth stock accommodating groove 721 is located at the third stock accommodating groove 712 in the X-axis direction; when the side groove plate 72 is located at the aforementioned rear position, the fifth stock groove 721 is located at the second stock groove 711 in the X-axis direction.

A tube section positioning mechanism 74 is disposed beside the third material supporting groove 712, and includes a support 740, a positioning rod 742 disposed on one side of the third material supporting groove 712 in the groove length direction, a material pushing rod 743 disposed on the other side of the groove length, and a material pushing driving device 744 for pushing the material pushing rod 743 to reciprocate along the Y-axis direction. The material pushing driving device 744 can be a linear displacement output device such as a linear motor, an air cylinder, an oil cylinder and the like, and in this embodiment, a material pushing air cylinder is specifically selected.

The positioning rod 742 is attached to the holder 740 so as to be adjustable in position in the Y-axis direction. On the bracket 740, a guide rod mechanism composed of a guide rod 747 and a sliding bearing 745 is fixedly arranged at two sides of the pushing drive device 744, a connecting plate 746 is fixedly arranged at the front end of the guide rod 747, the pushing rod 743 is fixed on the front end face of the connecting plate 746, the stator of the pushing drive device 744 is fixed on the bracket 740, and the mover is fixedly connected with the connecting plate 746, so as to push the end face of the pipe section arranged in the third positioning slot 712 to abut against the positioning rod 742, thereby realizing the positioning of the pipe section in the Y-axis direction. A material detecting sensor 7120 for detecting whether a tube material is present in the third material supporting groove 712 is installed beside the third material supporting groove, and the material detecting sensor may be a proximity switch, a blocking type photoelectric sensor or a diffuse reflection type photoelectric sensor, and in this embodiment, a laser sensor is specifically used. The oil detecting sensor outputs a detecting signal to the control unit, controls the pipe segment positioning mechanism 74 to start to position when the detecting signal indicates that a pipe exists in the third material supporting groove 712, and controls one of a judging signal for controlling the first pipe moving manipulator unit to convey the pipe to the stepping material distributing unit and a judging signal for controlling the second pipe moving manipulator unit to take the pipe from the third material supporting groove 712.

Referring to fig. 4 and 16, the first pipe transfer robot unit 8 includes a mounting base 80, a first clamping claw 81 and a second clamping claw 82 mounted on the mounting base 80 at a first interval, a transfer slide 84 driven by a transfer driving device 83 to reciprocate in the X-axis direction, an elevating mechanism 85 for elevating and lowering the mounting base 80 relative to the transfer slide 84, and a rotating mechanism 86 for rotating the mounting base 80 relative to the transfer slide 84 about a vertical axis. In this embodiment, the rotating mechanism 86 is a rotating cylinder, and the lifting mechanism 85 is a telescopic cylinder; the transfer driving device 83 selects a servo motor 830 and a gear-rack mechanism 831, the servo motor 830 is fixed on the transfer slide carriage 84, the gear is coaxially fixed on the rotor shaft of the servo motor 830, the rack is fixed on the supporting beam 800, the supporting beam 800 is fixedly provided with an I-shaped guide rail arranged along the X-axis direction, the transfer slide carriage 84 is fixedly provided with an I-shaped slide block matched with the I-shaped guide rail, so that the transfer slide carriage 84 can be suspended on the supporting beam 800 in a reciprocating sliding manner along the X-axis direction. And a transverse position adjustable mechanism 87 is installed between the rotating mechanism 86 and the lifting mechanism 85, and the transverse position adjustable mechanism 87 comprises a linear guide rail sliding block mechanism and a quick release mechanism for locking the relative position between the guide rail and the sliding block, so that the position of the mounting seat 80 in the transverse direction is finely adjusted in the installation process, and the position of the stepping material distributing unit 14 is better matched.

In the working process, the two

material clamping claws

81 and 82 with the first distance are used for grabbing two fixed-length pipe sections from the pipe cutting clamp dies 1220 and 1320 with the first distance from the axis, the pipe sections are driven by the lifting mechanism 85 to rise to a certain height, then the pipe sections are driven by the rotating mechanism 86 to rotate 90 degrees to the length direction of the fixed-length pipe sections and are arranged along the Y axial direction, the pipe sections are driven by the transfer driving device 83 to move along the X axial direction to be positioned right above the first material supporting groove 710 and the second material supporting groove 711 respectively, the pipe sections are driven by the lifting mechanism 85 to descend to be positioned in the two material supporting grooves, and then the two material clamping claws are opened to place the two pipe sections into the first material supporting groove 710 and the second material supporting groove 711. Then, the two side groove plates 72 raise the two fixed length pipe sections in the Z-axis direction to a position where the lower edges of the pipe sections are higher than the upper plate surface of the middle groove plate 71 under the lifting driving of the linear displacement output device 731, so as to move forward along the X-axis direction by the first distance under the forward driving of the linear displacement output device 741, and then the two fixed length pipe sections are placed in the second stock groove 711 and the third stock groove 712 under the lowering driving of the linear displacement output device 731, thereby realizing the step-by-step movement of the fixed length pipe sections. That is, the first material moving manipulator unit 8 is used for placing a plurality of pipe sections generated by synchronous cutting on the material supporting groove after rotating for a certain angle around the same vertical axis, namely two pipe sections and rotating for 90 degrees in the embodiment.

The second tube moving manipulator unit 9 comprises a synchronous transfer sliding seat 95 which is driven by the transfer driving device 90 to reciprocate on a supporting beam 900 along the X-axis direction, and four

manipulators

91, 92, 93 and 94 which are fixedly arranged on the synchronous transfer sliding seat and respectively correspond to the tube end rotary punching unit 161, the tube end straight punching unit 162, the tube section positioning unit 17 and the tube bending unit, namely the number of the manipulators is equal to the number of processing units in the processing and forming system; the four manipulators have the same structure, and the manipulator 91 is taken as an example to illustrate the structure, the manipulator 91 comprises a material clamping claw 910, a mounting seat 911 fixedly arranged on the synchronous transfer sliding seat 95, and a lifting mechanism 912 for driving the material clamping claw 910 to lift relative to the mounting seat 911. The pipe sections processed by the current unit are grabbed from the third material supporting groove 712, the pipe end rotary punching clamping die, the pipe end straight punching clamping die and the V-shaped positioning groove 410, ascend, synchronously move forwards along the X axis in the positive direction, and descend, so that the four pipe sections are synchronously placed between the end rotary punching clamping die, the pipe end straight punching clamping die, the V-shaped positioning groove 410 and the round die and the clamping die of the pipe bending unit 18 for processing of the next procedure. That is, the material transferring system is used to alternately transfer the tube sections cut by two sets of tube section feeding units arranged side by side to the tube end processing unit 16, and sequentially and synchronously transfer the tube sections to each processing unit of the processing and forming system 15 according to the processing procedure. In the embodiment, the lifting of each manipulator can be independently controlled, and only the reciprocating movement along the X-axis is synchronous control; of course, the lifting of the four manipulators can be synchronously controlled. In this embodiment, the support beams 800, 900 are the same support beam.

Referring to fig. 1 to 19, the process of manufacturing the socket using the above-described manufacturing apparatus includes a feeding step S1 and a forming step S2, i.e., the feeding step S1 and the forming step S2 described below can be implemented when the processor of the control unit executes a program stored in the memory.

And a feeding step S1, wherein more than two groups of pipe section feeding units arranged in parallel are used for synchronously straightening corresponding coil pipes into straight pipe materials, and the long pipe materials synchronously straightened are cut into short pipe sections without chips.

In the present embodiment, as shown in fig. 17, the fixed length pipe sections 01 arranged in the X-axis direction in the axial direction are cut out by two sets of pipe section supply units simultaneously.

And a processing and forming step S2, wherein the tube sections cut by the tube section supply units are processed by tube end processing alternately. Specifically, the method includes a sorting step S21, a processing step S22, and a stepping step S23.

In the sorting step S21, the synchronously cut short tube sections 01 are sequentially arranged at equal intervals along the direction of the main rotating shaft of the chipless rotary cutting apparatus, i.e. along the X-axis, and the length direction of the short tube sections is perpendicular to the direction of the main rotating shaft, i.e. along the X-axis.

The first pipe moving manipulator unit 8 is matched with the stepping material distribution unit, so that the fixed-length pipe sections 01 arranged along the Y axis are rotated to be arranged along the X axis and are arranged on the middle groove plate 71 at equal intervals.

In the processing step S22, the pipe segment arranged at the front end is grasped and pipe end processing is performed.

Grabbing the pipe section positioned on the third material supporting groove 712 by using the manipulator 91 and transferring the pipe section to the pipe end spinning unit 161, and simultaneously performing pipe end processing on two ends, specifically, flaring processing is performed on one end, and necking processing is performed on the other end; then, the robot 92 grips the pipe segment and transfers it to the pipe-end straight punch unit 162, and performs flaring processing simultaneously on both pipe ends of the pipe segment, thereby obtaining a pipe segment 02 shown in fig. 18.

Next, the robot 93 grasps the pipe section 02 and moves it onto the pipe section positioning unit 17 to position it in the Y-axis direction.

Then, the manipulator 94 grips the pipe segment 02 and moves the pipe segment onto the pipe bending unit 18, and the pipe bending unit 18 performs pipe bending processing on the pipe segment 02 subjected to pipe end processing and positioning processing in sequence to obtain a pipe segment 03 shown in fig. 13 and 19, and the pipe segment 03 is pushed by the discharging unit 53 and falls into the material collecting unit 19.

Step S23, after the pipe sections in the third material supporting groove 712 are grabbed, the sequentially arranged pipe sections are moved forward by the distance between two adjacent pipe sections, i.e. the first distance, so as to move the pipe sections in the second material supporting groove 711 into the third material supporting groove 712, and synchronously move the pipe sections in the first material supporting groove 710 into the second material supporting groove 711, and the processing step S22 is repeated until the sequentially arranged pipe sections are processed.

The sorting step S21, the processing step S22 and the stepping step S23 are repeated to manufacture the electronic expansion valve adapters automatically and in batches.

In the above embodiment, for a pipe segment whose both ends are required to be subjected to pipe end processing, the pipe end processing unit simultaneously performs pipe end processing on both ends of the pipe segment, and if only one end of the pipe segment is required to be subjected to pipe end processing, the pipe end processing unit performs pipe end processing on the corresponding end of the pipe segment.

In the above embodiments, although the concept of the present invention is exemplified by the manufacture of the electronic expansion valve, those skilled in the art can adapt the configurations of the feeding system and the pipe end processing unit according to the pipe material and diameter change of the coil pipe, and can produce the EC connection pipe in the four-way valve and the straight pipe connection pipe in the electronic expansion valve by omitting the pipe bending unit.

The main idea of the invention is to adopt a plurality of paths of coil pipe straightening units and chipless rotary cutting units which are arranged in parallel to straighten and cut a coil pipe material into short pipe sections, and sequentially transfer the short pipe sections which are synchronously cut at the same time to a pipe end processing unit for pipe section processing, thereby avoiding cutting chips and keeping the cleanness of the production environment, and better matching the processing efficiency between a feeding system and a processing and forming system. According to the conception, the structures of the core rod unit, the pipe bending machine head, the clamping die and the guide die in the pipe bending unit have various obvious changes; the function of the stepping material distribution unit can be completed by adopting a plurality of mechanical arms, so that the function of alternative transfer is completed, for example, a plurality of mechanical arms which are independently controlled and can move around the annular supporting beam in a rotary manner grab the pipe sections cut out in the current round and then convey the pipe sections to the pipe end processing unit one by one.

Claims

1. A manufacturing device of an EC (embedded control) connecting pipe or an electronic expansion valve connecting pipe comprises a rack, a pipe section feeding system and a processing and forming system, wherein the pipe section feeding system is installed on the rack;

the method is characterized in that:

the pipe section feeding system comprises more than two groups of pipe section feeding units which are arranged in parallel; the pipe section feeding unit comprises a coil pipe straightening unit, a chipless rotary cutting unit and a cutting clamp die arranged on one side of the chipless rotary cutting unit, which is far away from the coil pipe straightening unit, the chipless rotary cutting unit is used for cutting long pipes straightened by the coil pipe straightening unit into pipe sections, and the cutting clamp die is a clamp die which is opened and closed along the transverse direction; the machine-shaping system includes a pipe end processing unit that performs pipe end processing on at least one end of a cut pipe section;

the frame is provided with a material moving system which is used for grabbing the more than two groups of pipe section feeding units which are arranged in parallel on the pipe section which is cut at the same time from the cutting clamping die and carrying out lifting and rotating operations, and then sequentially moving the pipe section feeding units to the pipe end processing unit according to the position arrangement sequence of the chipless rotary cutting unit;

the machine-shaping system includes a pipe bending unit located downstream of the pipe end treatment unit in a transfer direction of the pipe section; the pipe bending unit comprises a pipe bending machine head, a core rod unit and a discharging unit; the pipe bending machine head comprises a clamping die, a round die and a swing arm; the mandrel unit comprises a mandrel and a mandrel driving mechanism for driving the mandrel to extend into or withdraw from the pipe section;

the discharging unit comprises a pushing sleeve sleeved outside the core rod and a pushing driving device used for driving the pushing sleeve to reciprocate along the axial direction of the core rod;

a material guide plate is fixedly arranged at the fixed end part of the swing arm, is vertically positioned between the circular die and the swing arm and comprises an inclined base plate with an avoidance port matched with the mounting seat of the circular die;

when the clamping die cavity of the clamping die is axially arranged along the axial direction of the core rod, the inclined substrate is obliquely arranged downwards along the direction of the circular die departing from the core rod driving mechanism, and flanges are fixedly arranged on the edge part of the inclined substrate facing the clamping die and the edge part of the inclined substrate facing the core rod driving mechanism.

2. The manufacturing apparatus according to claim 1, wherein:

the pipe end processing unit comprises a pipe section clamping die, a first pipe end processing machine head and a second pipe end processing machine head, wherein the first pipe end processing machine head and the second pipe end processing machine head are positioned on two sides of the pipe section clamping die, and the processing sides of the first pipe end processing machine head and the second pipe end processing machine head face the pipe section clamping die;

the axial direction of the main shaft of the pipe end processing machine head is vertical to the axial direction of the rotary main shaft of the chipless rotary cutting unit.

3. The manufacturing apparatus according to claim 1, wherein:

the material moving system comprises a stepping material distributing unit and a pipe moving manipulator unit;

the stepping material distribution unit comprises a middle trough plate, side trough plates arranged on two sides of the middle trough plate respectively, and a stepping driving unit;

one of the middle trough plate and the side trough plates is provided with a first material supporting trough, a second material supporting trough and a third material supporting trough which are arranged at equal intervals along the material moving direction, the other one of the middle trough plate and the side trough plates is provided with a fourth material supporting trough and a fifth material supporting trough which are arranged at equal intervals along the material moving direction, and the length of each material supporting trough is arranged along the direction perpendicular to the material moving direction;

the stepping driving unit comprises a lifting driving unit for driving the other one to move up and down relative to the other one and a traveling driving unit for reciprocating along the material moving direction.

4. The manufacturing apparatus according to claim 3, wherein:

the axial line spacing of the rotating main shafts of two adjacent chipless rotary cutting units is equal to the first spacing, and the material moving direction is parallel to the axial direction of the rotating main shafts;

the pipe moving manipulator unit comprises a first pipe moving manipulator unit which is used for moving a pipe section from a clamping die of the chipless rotary cutting unit to the stepping distributing unit; the first pipe moving manipulator unit comprises a mounting seat, a first clamping claw and a second clamping claw which are mounted on the mounting seat at a first distance, a transfer sliding seat which is driven by a transfer driving device and can reciprocate along the material moving direction, a lifting mechanism which drives the mounting seat to lift relative to the transfer sliding seat, and a rotating mechanism which drives the mounting seat to rotate relative to the transfer sliding seat around a vertical shaft;

the number of the middle groove plates is more than two and the middle groove plates are arranged at intervals to form one;

and a pipe section positioning mechanism is arranged beside the third material supporting groove and comprises a positioning rod arranged on one groove side and a material pushing rod arranged on the other groove side.

5. The manufacturing apparatus according to claim 4, wherein:

the number of the pipe section feeding units is two, and the number of the middle groove plates is two.

6. The manufacturing apparatus according to any one of claims 3 to 5, wherein:

the pipe moving manipulator unit comprises a second pipe moving manipulator unit which transfers pipe sections from the stepping material distribution unit to the processing and forming system and transfers the pipe sections among the processing units in the processing and forming system according to the processing procedure sequence;

the second pipe moving manipulator unit comprises a synchronous transfer sliding seat which is driven by a transfer driving device and can reciprocate along the material transfer direction, and a plurality of manipulators fixedly arranged on the synchronous transfer sliding seat; the number of manipulators is equal to the number of processing units; the manipulator comprises a clamping claw, a mounting seat fixedly arranged on the synchronous transfer sliding seat and a lifting mechanism for driving the clamping claw to lift relative to the mounting seat; the distance between two adjacent installation bases is equal.

7. The manufacturing apparatus according to claim 1, wherein:

along the transfer direction of the pipe section, the processing and forming system comprises a pipe section positioning unit positioned between the pipe end processing unit and the pipe bending unit, and the pipe section positioning unit comprises a material supporting groove, a positioning rod arranged on one groove side and a material pushing rod arranged on the other groove side.