CN207887757U - Necking mechanism and metal tube processing unit equipped with necking mechanism - Google Patents

Abstract

The utility model provides a kind of necking mechanism and the metal tube processing unit equipped with necking mechanism, including rack, first necking die, first necking actuator, second necking die, second necking actuator and necking link stopper, first necking die connect with the first necking actuator and is installed on rack top surface, second necking die connect with the second necking actuator and is fixed on rack top surface, first necking die and the second necking die are set up in parallel positioned at the same side, the necking size of first necking die is small compared with the necking size of the second necking die, with to the necking at twice of same metal tube, necking link stopper is installed in rack installation opposite with the first necking die and the second necking die, for supporting one end of metal tube, it is squeezed and necking corresponding thereto convenient for the first necking die and the second necking die.The necking mechanism can realize automatic necking, improve production efficiency.

Description

Necking mechanism and metal tube processing unit equipped with necking mechanism

Technical field

The utility model is related to metal tubes to assemble frame manufacturing technology field, more particularly to a kind of necking mechanism and be equipped with The metal tube processing unit of necking mechanism.

Background technology

Referring to Fig. 1, metal tube assembling frame is the metal tube for several metal tube A being fixed by socket and being constituted different length Then the metal tube A assemblys of different length are built into frame structure by assembly, used to manufacture the households such as clothes hanger or shoe rack Product.When by two metal tube A sockets, one end of a metal tube A need to be inserted in another metal tube A, then solid by bolt etc. Determine part and fix two pipe socket places, therefore, it is necessary to which one end of metal tube A is carried out the draw (the ends metal tube A is squeezed and are contracted The outer diameter of small metal tube A), to be mutually socketed, in addition, need to also be in the socket place of metal tube A (i.e. near the both ends of metal tube A) Mounting hole B is opened up, to be bolted.In order to carry out the automatic draw to metal tube A, it is necessary to design a kind of necking machine Structure.

Utility model content

The utility model provides a kind of necking mechanism and the metal tube processing unit equipped with necking mechanism, the necking mechanism Automatic necking can be achieved, improve production efficiency.

The utility model is related to technical solution：

A kind of necking mechanism, including rack, the first necking die, the first necking actuator, the second necking die, the second contracting Mouth actuator and necking link stopper, the first necking die connect with the first necking actuator and are installed on rack top surface, the second necking Mold connect with the second necking actuator and is fixed on rack top surface, and the first necking die and the second necking die are located at the same side It is set up in parallel, the necking size of the first necking die is small compared with the necking size of the second necking die, to be divided to two to same metal tube Secondary necking, necking link stopper is installed in rack installation opposite with the first necking die and the second necking die, for supporting metal One end of pipe squeezes and necking corresponding thereto convenient for the first necking die and the second necking die.

A kind of metal tube processing unit, including conveyer system, processing hold-down mechanism and the necking mechanism, conveyer system It is installed in rack, processing hold-down mechanism is set up in above rack, and necking mechanism is set to the both sides of the conveyer system.

Further, the conveyer system includes feeding mechanism, feed device and detent mechanism, and one end of rack is set up There is a feeding mechanism, feed device liftable and translatable the discharge end being set up in above rack close to feeding mechanism, to will The metal tube of feeding mechanism jacks and is sent to detent mechanism, and detent mechanism is installed on rack top surface, to be positioned to metal tube.

Further, the feeding mechanism includes material-storing box, conveyer belt and belt-driven part, and material-storing box is set up in transmission The bottom surface of top with one end, material-storing box is inclined surface, and the both sides of inclined surface lower end are equipped with limit hopper, once can only for limiting By a metal tube, the lowermost end for limiting hopper is equipped with discharge port, and conveyer belt is located at the underface of discharge port, the appearance of conveyer belt Face is set as smooth, and the width of conveyer belt is less than the length of metal tube, and conveyer belt is equipped with the raised line of default spacing.

Further, the feed device includes translation lifting mechanism, braced frame, retainer bar group and feeding compacting machine Structure, translation lifting mechanism are installed in rack, and braced frame is installed at the top of translation lifting mechanism, and retainer bar group includes two transmission Band retainer bar and two transfer retainer bars, two conveyer belt retainer bars are installed on one end of braced frame, two transfer retainer bar installations In the other end for extending to braced frame in braced frame from the end of two conveyer belt retainer bars, and two transfer retainer bars are set to two Between conveyer belt retainer bar, two conveyer belt retainer bars and two transfer retainer bars are equipped with several retainer slots, two conveyer belt retainer bars Spacing is more than the width of conveyer belt, and feeding pressing mechanism is installed on the top of braced frame.

Further, the translation lifting mechanism includes fixed bottom plate, is set to two sliding rails of fixed bottom plate, slideably sets In the lifting actuator on two sliding rails, it is installed on the fixation top plate of the lift side of lifting actuator, and the fixed bottom plate of installation Transmission actuator for driving lifting actuator sliding, braced frame are installed on fixed top plate.

Further, the feeding pressing mechanism includes that two feedings compress actuator and two parallel press strips, two feeding pressures Tight actuator is respectively arranged on the both ends for being located at two press strips in braced frame, and two feedings compress the lift side of actuator and two press strips connect It connects.

Further, the processing hold-down mechanism includes the liftable necking for compressing holder and being installed on compression holder Compaction mold compresses holder and is set up in above rack.

The beneficial effects of the utility model：

Compared with prior art, the utility model necking mechanism, by the first necking die and the second necking die to same The necking at twice of one metal tube avoids a necking that metal tube is caused to split, it can be achieved that automatic necking, improves production efficiency.

Description of the drawings

Fig. 1 is the utility model metal tube stereogram to be processed；

Fig. 2 is the utility model for the automatic draw of metal tube, the assembling figure at the first visual angle of the equipment of punching and polishing；

Fig. 3 is the utility model for the automatic draw of metal tube, the assembling figure at another visual angle of the equipment of punching and polishing；

Fig. 4 is the utility model for the automatic draw of metal tube, the exploded view of the equipment of punching and polishing；

Fig. 5 is the utility model for the automatic draw of metal tube, the structure chart of the workpiece polishing mechanism of the equipment of punching and polishing；

Fig. 6 is the utility model for the automatic draw of metal tube, conveyer belt, the conveyer belt retainer of the equipment of punching and polishing The first transmission state diagram between bar, transfer retainer bar and locating rod；

Fig. 7 is the utility model for the automatic draw of metal tube, conveyer belt, the conveyer belt retainer of the equipment of punching and polishing The second transmission state diagram between bar, transfer retainer bar and locating rod；

Fig. 8 is the utility model for the automatic draw of metal tube, conveyer belt, the conveyer belt retainer of the equipment of punching and polishing Third between bar, transfer retainer bar and locating rod transmits state diagram；

Fig. 9 is the utility model for the automatic draw of metal tube, conveyer belt, the conveyer belt retainer of the equipment of punching and polishing The 4th transmission state diagram between bar, transfer retainer bar and locating rod；

Figure 10 is the utility model for the automatic draw of metal tube, the conveyer belt of the equipment of punching and polishing, conveyer belt support Expect the 5th transmission state diagram between bar, transfer retainer bar and locating rod；

Figure 11 is the utility model for the automatic draw of metal tube, the conveyer belt of the equipment of punching and polishing, conveyer belt support Expect the 6th transmission state diagram between bar, transfer retainer bar and locating rod.

Specific implementation mode

With reference to the attached drawing in the utility model embodiment, the technical scheme in the embodiment of the utility model is carried out clear Chu is fully described by.It should be appreciated that specific embodiment described herein is only used to explain the utility model, it is not used to Limit scope of protection of the utility model.

Please refer to Fig.1 to Fig.4, the utility model provide it is a kind of for the automatic draw of metal tube, punching and polishing equipment, For polishing by one end draw of metal tube A, both ends punching and to remaining burr after punching.The equipment includes rack 1, feeding mechanism 2, feed device 3, detent mechanism 4, necking mechanism 5, punch mechanism 6, processing hold-down mechanism 7 and workpiece polishing mechanism 8. Rack 1, feeding mechanism 2, feed device 3 and the combination of detent mechanism 4 constitute conveyer system.

One end of rack 1 is provided with feeding mechanism 2,3 liftable of feed device and translatable is set up in 1 top of rack Close to the discharge end of feeding mechanism 2, the metal tube A of feeding mechanism 2 is sent to detent mechanism 4, detent mechanism 4 is installed In 1 top surface of rack, to be positioned to metal tube A, the both sides of detent mechanism 4 are opposite successively to be equipped with necking mechanism 5, punch mechanism 6 And workpiece polishing mechanism 8, processing hold-down mechanism 7, which is set up in rack 1, is being located at necking machine structure 5, punch mechanism 6 and workpiece polishing mechanism 8 just Top, to the metal tube A on pressed positioning mechanism 4, so as to the draw, punching and polishing, processing hold-down mechanism 7 is higher than feeding Device 3, so that feed device 3 shuttles in the inside of processing hold-down mechanism 7.

In use, metal tube A is sent into feeding mechanism 2, feed device 3 lifts the metal tube A jackings on feeding mechanism 2 From feeding mechanism 2, when surface for then moving to detent mechanism 4, declines pre-determined distance so that metal tube A is positioned at localization machine On structure 4, the metal tube A on 7 pressed positioning mechanism 4 of hold-down mechanism is processed, necking mechanism 5, punch mechanism 6 and workpiece polishing mechanism 8 are each From the draw, punching and polishing is carried out, finally, the metal tube A machined on detent mechanism 4 is jacked and is translated by feed device 3 Out.The increasingly automated of the draw, punching and polishing is carried out to metal tube A in this way, realizing, improves production efficiency, is reduced Labor intensity.

Further, please see Fig. 2 to Fig. 4, feeding mechanism 2 includes material-storing box 9, conveyer belt 10 and belt-driven part 11, material-storing box 9 is set up in the top of 10 one end of conveyer belt, and the bottom surface of material-storing box 9 is inclined surface, and the both sides of inclined surface lower end are equipped with Hopper 12 is limited, the lowermost end of hopper 12 by a metal tube A, can only be once limited equipped with discharge port, conveyer belt 10 for limiting Positioned at the underface of discharge port, the width of conveyer belt 10 is less than the length of metal tube A so that the both ends of metal tube A are from conveyer belt 10 both sides are stretched out, and are transferred so that feed device 3 jacks, and conveyer belt 10 is equipped with the raised line 13 of default spacing, 13 height of raised line with Height when metal tube A is fallen on conveyer belt 10 is suitable, and the outer surface of conveyer belt 10 is set as smooth so that conveyer belt 10 and gold Belonging to the frictional force between pipe A is insufficient to allow conveyer belt 10 to drive metal tube A movements, just so that gold only under the drive of raised line 13 Belong to pipe A movements.When raised line 13 moves, the one side wall of raised line 13 is held in the one side wall of metal tube A, to drive metal tube A It is corresponding mobile, so so that each metal tube A is close to 13 side wall of each raised line and positions, simultaneously so as to the jacking of feed device 3 Transmission, belt-driven part 11 is for driving conveyer belt 10 to move.

Further, Fig. 4, Fig. 6 and Fig. 7 are please referred to, feed device 3 includes translation lifting mechanism 14, braced frame 15, support Material bar group 16 and feeding pressing mechanism 17, translation lifting mechanism 14 are installed in rack 1, and braced frame 15 is installed on translation lifting 14 top of mechanism, retainer bar group 16 include that the shorter two conveyer belt retainer bar 16a being mutually parallel in long bottom and long bottom are longer Two transfer retainer bar 16b, two conveyer belt retainer bar 16a being mutually parallel are installed on one end of braced frame 15, two transfer retainers Bar 16b is installed on the other end for extending to braced frame 15 in braced frame 15 from the end of two conveyer belt retainer bar 16a, and Two transfer retainer bar 16b are set between two conveyer belt retainer bar 16a, the transfer retainer bars of two conveyer belt retainer bar 16a and two 16b Several retainer slots 18 of the default spacing for housing metal tube A are equipped with, two conveyer belt retainer bar 16a spacing are more than conveyer belt 10 width, so that metal tube A is jacked and is transferred from the both sides of conveyer belt 10 by two conveyer belt retainer bar 16a, feeding compacting machine Structure 17 is installed on the top of braced frame 15, for pushing down the metallic rod A on two retainer slots 18 in feeding process, in order to avoid when transmission It falls.

Further, please see Fig. 2 to Fig. 4, translation lifting mechanism 14 includes fixed bottom plate 19, is set to fixed bottom plate 19 Two sliding rails 20, the lifting actuator 21 being slidingly disposed on two sliding rails 20 are installed on consolidating for the lift side of lifting actuator 21 Determine top plate 22, and the transmission actuator 35 on bottom plate 19 for driving lifting actuator 21 to slide, braced frame are fixed in installation 15 are installed on fixed top plate 22.

More specifically, please referring to fig. 4 to fig. 6, in the present embodiment, each conveyer belt retainer bar 16a is equipped with corresponding Four retainer slots 18, the transmission driving lifting actuator 21 of actuator 35 slide pre-determined distance, and lifting actuator 21 drives support frame Frame 15 is accordingly mobile, and then two conveyer belt retainer bar 16a is driven to be moved to the both sides of conveyer belt 10, lifts actuator 21 at this time and pushes up Braced frame 15 is risen, two conveyer belt retainer bar 16a jack two metal tube A from conveyer belt 10, are then transported between actuator 35 It connects when two conveyer belt retainer bar 16a of driving are back to 4 top of detent mechanism and declines so that two on two conveyer belt retainer bar 16a Metal tube A is positioned on detent mechanism 4.Then two conveyer belt retainer bar 16a return again to the both sides of conveyer belt 10 and continue in repetition Action process is stated, in a manner of transmitting two metal tube A every time, in turn metal tube is sent on detent mechanism 4 and is positioned.Two The quantity that conveyer belt retainer bar 16a transmits metal tube A every time is not limited to two in the present embodiment, can also once transmit One or three or more, two conveyer belt retainer bar 16a transmit every time the quantity of metal tube A and necking mechanism 5, punch mechanism 6 and The quantity that each station of workpiece polishing mechanism 8 can once process metal tube A is consistent, so as in each transmit process by a upper work Metal tube A after the completion of position is sent to next station processing so that transmits and acts in agreement with what is processed, avoids repeating to process.Example Such as, when two conveyer belt retainer bar 16a transmit the quantity three of metal tube A every time, then necking mechanism 5, punch mechanism 6 and polishing The quantity that each station of mechanism 8 can once process metal tube A is also three.

Further, please see Fig. 2 to Fig. 4, feeding pressing mechanism 17 includes that two feedings compression actuator 23 and two is parallel Press strip 24, two feedings compress actuator 23 be respectively arranged in braced frame 15 be located at two press strips 24 both ends, two feedings compress The lift side of actuator 23 is connect with two press strips 24, to drive two press strips 24 to lift.

Further, it please refers to Fig.1 to Fig.3, detent mechanism 4 includes relatively parallel two locating rods 25, two locating rods 25 It is equipped with locating slot corresponding with several retainer slots 18 26, two locating rods 25, which are installed in rack 1, is divided into two transfer retainer bars The both sides of 16b, two locating rods 25 extend close to one end of feeding mechanism 2 along machine direction from two conveyer belt retainer bar 16a, retainer Slot 18 is movably corresponded with locating slot 26 under the effect of translation lifting mechanism 14, so that conveyer belt retainer bar 16a will be passed The two metal tube A for jacking and sending on band 10 are sent to be placed in two locating slots 26 at two locating rods, 25 initiating terminal.

Further, please see Fig. 2 to Fig. 4, the necking mechanism 5 includes the first necking die 27, the first necking driving Part 28, the second necking die 27a, the second necking actuator 28b and necking link stopper 29, the first necking die 27 and the first necking are driven Moving part 28 connects and is installed on the outside that 1 top surface of rack is located at any locating rod 25, the second necking die 27a and the second necking Actuator 28b connects and is fixed on 1 top surface of rack, and it is arranged side by side that the first necking die 27 and the second necking die 27a are located at the same side Setting, necking link stopper 29 are installed in rack 1 installation opposite with the first necking die 27 and the second necking die 27a, this implementation The first necking die 27 and the second necking die 27a in example are all provided with there are two machining position, once to two metal tube A processing, this It is to be consistent with the transmission mode of feed device 3, is transmitted two-by-two with realizing, necking two-by-two, the necking of the first necking die 27 Size is small compared with the necking size of the second necking die 27a, and the first necking die 27 first carries out a bit of necking to metal tube A, so The second necking die 27a is to by the metal tube A further neckings after 27 necking of the first necking die afterwards.First necking die 27 and second necking die 27a respectively to metal tube A neckings at twice, avoid a necking that metal tube A is caused to split.

More specifically, under the compression fit of processing hold-down mechanism 7, necking actuator 28 drives necking die 27 to contracting 29 side of mouth link stopper squeezes so that the one end metal tube A being positioned in two locating rods 25 is held on necking link stopper 29, the other end It is held in necking die 27, necking is realized through opposing compression.

Further, please see Fig. 2 to Fig. 4, there are two punch mechanism 6 is set, opposite rack 1 can be slidably mounted to respectively Top surface is located at the both sides of detent mechanism 4, and punch mechanism 6 includes punching die 30, die-filling holder 31, punching actuator 32 and sliding Actuator 33, punching die 30 are installed on the bottom of die-filling holder 31, and punching actuator 32 is installed on the top of die-filling holder 31, Punching actuator 32 is connect with punching die 30, and to drive punching die 30 to lift, sliding actuator 33 is installed on die-filling branch The side of 31 bottom of frame, for driving die-filling holder 31 to slide.Under the compression fit of processing hold-down mechanism 7, two punch mechanisms 6 relatively move under the driving of respective sliding actuator 33, and the metal tube A in two locating rods 25 is clamped in two punching dies 30 Both ends, punching actuator 32 drive the cutter of punching die 30 to push and drill.Similarly, punching die 30 also is provided with two processing Position, is consistent with the transmission mode of feed device 3.

Further, please see Fig. 2 to Fig. 4, processing hold-down mechanism 7 includes compressing holder 34, being installed on compression branch successively Liftable necking compaction mold 36, punching compaction mold 37 and the polishing compaction mold 38 at 34 top of frame, compress holder 34 and pacify It is located at the both sides of detent mechanism 4, necking compaction mold 36, punching compaction mold 37 and polishing compaction mold loaded on 1 top surface of rack 38 are each provided with corresponding actuator to drive its lifting.

Further, please see Fig. 2 to Fig. 4, workpiece polishing mechanism 8 includes four grinding heads 40, two lower of shaft 39, four Board 41 and polishing actuator 42, four grinding heads 40 are respectively arranged in the top of four shafts 39, four difference of shaft 39 two Two are relatively installed on the both sides that 1 top surface of rack is located at detent mechanism 4, and the upper end of two shafts 39 of 4 side of detent mechanism can turn Dynamic to be installed in rack 1, lower end is pivotally mounted in a lower support plate 41, two shafts 39 of 4 other side of detent mechanism Upper end is pivotally mounted in rack 1, and lower end is pivotally mounted in another lower support plate 41, and polishing actuator 42 is installed Four shafts 39 are driven to rotate by helical teeth transmission device in the output shaft for actuator 42 of in a lower support plate 41, polishing.Similarly, Four shafts 39 and four grinding heads 40 also for once to beating simultaneously at the both ends punching of two metal tube A in the present embodiment Mill, to be consistent with the transmission mode of feed device 3.

Further, Fig. 4 and Fig. 5 is please referred to, helical teeth transmission device includes 45, two gearbox 44, driving shaft driving shafts Seat 46 and four boss helical gears 47, the output shaft that gearbox 44 is set in a lower support plate 41 with polishing actuator 42 connect It connects, two active axle beds 46 are relatively arranged on respectively in two lower support plates 41, and driving shaft 45 is rotationally set up in two actives In axle bed 46, one end of driving shaft 45 and 44 phase of gearbox are sequentially connected, and two active axle beds 46 are located on driving shaft 45 to overhanging The both ends gone out have been respectively and fixedly connected with boss helical gear 47.

Helical teeth transmission device further includes the driven helical gear 50 of driven axle bed 49, four of two driven shaft 48, four and four It is driven helical gear 51, two driven axle beds 49 are set in a lower support plate 41, other two driven axle bed 49 is set to another In lower support plate 41, a driven shaft 48 is rotationally set up in two driven axle beds 49 in a lower support plate 41, Ling Yicong Moving axis 48 is rotationally set up in two driven axle beds 49 in another lower support plate 41, close to actively on two driven shafts 48 One end of axis 45 is protruding, and the external parts of two driven shafts 48 has been respectively and fixedly connected with boss helical gear 47, on each driven shaft 48 Boss helical gear 47 on the driving shaft 45 of boss helical gear 47 corresponding thereto engages, and is connected on each driven shaft 48 Two driven helical gears 50, are connected with transmission helical gear 51 in each shaft 39, each transmission helical gear 51 it is corresponding from Dynamic helical gear 50 engages.The number of driven helical gear 50 and transmission helical gear 51, can root depending on the number of grinding head 40 The number of grinding head 40 and the number of corresponding driven helical gear 50 and transmission helical gear 51 are set according to actual demand.

More specifically, polishing actuator 42 drives driving shaft 45 to rotate by gearbox 44, driving shaft 45 passes through respectively The boss helical gear 47 at both ends drives the rotation of two driven shafts 48, each driven shaft 48 respectively by two driven helical gears 50 drive with Its engage installation two shafts 39 rotation, each shaft 39 drive corresponding grinding head 40 rotate, the grinding head 40 of rotation with open Burr at hole rubs and removes burr repeatedly.By the kind of drive of such structure, installation space can be saved, facilitates whole The layout of each component of equipment, and stable mechanical performance, it is durable, it is big to transmit torque.

Further, referring to Fig. 5, the bottom for being located at grinding head 40 in two shafts 39 of homonymy is equipped with upper bearing plate 52, each upper bearing plate 52 is equipped with burr collection box 53, for collecting the burr fallen.

Further, referring to Fig. 4, the equipment of the utility model further includes two discharging slide bars 43, discharging slide bar 43 is installed It is located at the discharge end of two locating rods 25 in 1 top surface of rack, to export the metal tube A processed.

Action process of the utility model for the automatic draw of metal tube, the equipment of punching and polishing is as follows, please refers to Fig. 4 It is the state diagram in metal tube A transmit process to Figure 11, Fig. 7 to Figure 11.Several metal tube A are first stacked in material-storing box in an orderly manner In 9, the discharge port of 12 bottom end of limit hopper once falls a metal tube A on conveyer belt 10, and the raised line 13 on conveyer belt 10 pushes away Dynamic metal tube A movements so that each metal tube A one side walls are close to the one side wall of each raised line 13 and are positioned, and two conveyer belts are set The lower section that retainer bar 16a is located at two locating rods, 25 both sides is initial position (position as shown in FIG. 6 and 7), two conveyer belt retainers Bar 16a is moved to 10 down either side of conveyer belt in this initial position, then rises two metal tube A of end that conveyer belt 10 discharges Jacking, two press strips 24 transfer retainer bar in the two front lower two conveyer belt retainer bar 16a and two that push down of conveyer belt retainer bar 16a jackings Several metal tube A on 16b, also, two conveyer belt retainer bar 16a, during jacking, two press strips 24 are pushing down metal tube A's Accordingly and then rise under state, then two conveyer belt retainer bar 16a carry two metal tube A and move to two locating rods, 25 top again Decline so that two metal tube A are placed in two locating slots 26 of two locating rods, 25 initiating terminal, then two conveyer belt retainer bar 16a It returns to initial position to continue to jack two metal tube A of next round, so recycle, in a manner of transmitting two metal tube A every time, by It is respectively right positioned at necking machine structure 5, punch mechanism 6 and workpiece polishing mechanism 8 that two metal tube A are sequentially delivered in two locating rods 25 by step In the locating slot 26 answered, necking compaction mold 36, punching compaction mold 37 and polish compaction mold 38 compression fit under into The respective processing of row, after processing is completed, two transfer retainer bar 16b going out from two locating rods 25 by the metal tube A processed Material end is transferred on two discharging slide bars 43, and the metal tube A processed is finally skidded off from two 43 one end of discharging slide bar, is so far completed whole A process.The increasingly automated of the draw, punching and polishing is carried out to metal tube A in this way, realizing, improves production effect Rate reduces labor intensity.

The above description is only the embodiments of the present invention, and it does not limit the scope of the patent of the present invention, every Using equivalent structure or equivalent flow shift made by the utility model description, it is applied directly or indirectly in other phases The technical field of pass, is equally included in the patent within the scope of the utility model.

Claims (8)

1. a kind of necking mechanism (5), including rack (1), it is characterised in that：The necking mechanism (5) includes the first necking die (27), the first necking actuator (28), the second necking die (27a), the second necking actuator (28b) and necking link stopper (29), First necking die (27) connect with the first necking actuator (28) and is installed on rack (1) top surface, the second necking die (27a) It is connect with the second necking actuator (28b) and is fixed on rack (1) top surface, the first necking die (27) and the second necking die (27a) is set up in parallel positioned at the same side, the necking ruler of the necking size of the first necking die (27) compared with the second necking die (27a) It is very little small, with to same metal tube (A) necking at twice, necking link stopper (29) is installed in rack (1) and the first necking die (27) and the opposite installation of the second necking die (27a) is convenient for the first necking die (27) for supporting one end of metal tube (A) And second necking die (27a) squeeze and necking corresponding thereto.

2. a kind of metal tube processing unit, including conveyer system and processing hold-down mechanism (7), the conveyer system are installed on rack (1) on, processing hold-down mechanism (7) is set up in above rack (1), it is characterised in that：Metal tube processing unit setting just like Necking mechanism (5) described in claim 1, necking mechanism (5) are set to the both sides of the conveyer system.

3. metal tube processing unit according to claim 2, it is characterised in that：The conveyer system includes feeding mechanism (2), one end of feed device (3) and detent mechanism (4), rack (1) is provided with feeding mechanism (2), and feed device (3) can rise Drop and translatable the discharge end being set up in above rack (1) close to feeding mechanism (2), to by the metal of feeding mechanism (2) Pipe (A) jacks and is sent to detent mechanism (4), and detent mechanism (4) is installed on rack (1) top surface, to fixed to metal tube (A) Position.

4. metal tube processing unit according to claim 3, it is characterised in that：The feeding mechanism (2) includes material-storing box (9), conveyer belt (10) and belt-driven part (11), material-storing box (9) are set up in the top of conveyer belt (10) one end, material-storing box (9) bottom surface is inclined surface, and the both sides of inclined surface lower end are equipped with limit hopper (12), once can only be by a metal for limiting It manages (A), the lowermost end of limit hopper (12) is equipped with discharge port, and conveyer belt (10) is located at the underface of discharge port, conveyer belt (10) Outer surface is set as smooth, and the width of conveyer belt (10) is less than the length of metal tube (A), and conveyer belt (10) is equipped with default spacing Raised line (13).

5. metal tube processing unit according to claim 4, it is characterised in that：The feed device (3) includes that translation rises Descending mechanism (14), braced frame (15), retainer bar group (16) and feeding pressing mechanism (17), translation lifting mechanism (14) are installed on In rack (1), braced frame (15) is installed at the top of translation lifting mechanism (14), and retainer bar group (16) includes two conveyer belt retainers Bar (16a) and two transfer retainer bars (16b), two conveyer belt retainer bars (16a) are installed on one end of braced frame (15), and two move It send retainer bar (16b) to be installed in braced frame (15) and extends to braced frame from the end of two conveyer belt retainer bars (16a) (15) the other end, and two transfer retainer bars (16b) are set between two conveyer belt retainer bars (16a), two conveyer belt retainer bars (16a) and two transfer retainer bars (16b) are equipped with several retainer slots (18), and two conveyer belt retainer bar (16a) spacing are more than transmission The width of band (10), feeding pressing mechanism (17) are installed on the top of braced frame (15).

6. metal tube processing unit according to claim 5, it is characterised in that：The translation lifting mechanism (14) includes solid Determine bottom plate (19), is set to two sliding rails (20) of fixed bottom plate (19), the lifting actuator being slidingly disposed on two sliding rails (20) (21), it is installed on the fixation top plate (22) of the lift side of lifting actuator (21), and the fixed bottom plate (19) of installation for driving The transmission actuator (35) that dynamic lifting actuator (21) is slided, braced frame (15) are installed on fixed top plate (22).

7. metal tube processing unit according to claim 5, it is characterised in that：The feeding pressing mechanism (17) includes two Feeding compresses actuator (23) and two parallel press strips (24), and two feedings compress actuator (23) and are respectively arranged on braced frame (15) The upper both ends for being located at two press strips (24), the lift side that two feedings compress actuator (23) are connect with two press strips (24).

8. metal tube processing unit according to claim 2, it is characterised in that：The processing hold-down mechanism (7) includes pressure Locking bracket (34) and the liftable necking compaction mold (36) for being installed on compression holder (34) compress holder (34) and are set up in Above rack (1).