CN211564284U

CN211564284U - Necking die for circular tube

Info

Publication number: CN211564284U
Application number: CN201922259372.7U
Authority: CN
Inventors: 唐钟海
Original assignee: Zhangjiagang Liwan Precision Parts Co ltd
Current assignee: Zhangjiagang Liwan Precision Parts Co ltd
Priority date: 2019-12-17
Filing date: 2019-12-17
Publication date: 2020-09-25
Anticipated expiration: 2029-12-17

Abstract

The utility model discloses a pipe necking die, include: the base, the fixed folding plug that is provided with on the base, be connected with the mold core on the plug, it is provided with a plurality of first guide pillars to make progress vertically on the base, fixedly connected with takes off material mechanism on first guide pillar, be provided with the template in the below that lies in taking off material mechanism, template and first guide pillar sliding connection, it is provided with a plurality of second guide pillars to make progress vertically on the template, take off material mechanism and second guide pillar sliding connection, the second guide pillar upwards stretches out in taking off material mechanism, fixedly connected with connecting plate on the second guide pillar that upwards stretches out in taking off material mechanism, be connected with the die on the template, material hole and shaping hole have been seted up in proper order on the die, shaping hole and cylinder hole align to each other, shaping hole and mold core looks adaptation, be provided with the direction inclined plane in the bottom in shaping. The utility model has the advantages that: simple structure, convenient operation can be suitable for the pipe fitting of different pipe diameters, can carry out batch processing to the pipe fitting of different pipe diameters, has improved work efficiency greatly.

Description

Necking die for circular tube

Technical Field

The utility model relates to a pipe necking die.

Background

At present, the end part of the pipe fitting is reduced, a pipe reducing machine is mainly adopted for compression or a special die is adopted for stamping, and the pipe reducing machine mainly adopts a spinning mode for processing the end part of the pipe fitting. Spinning is to fix a flat plate or hollow blank on a die of a spinning machine, and press the pipe with a spinning wheel or a driving rod while the pipe rotates along with a main shaft of a machine to generate local plastic deformation. However, this method has the disadvantages of low productivity and high labor intensity. This approach is not suitable for mass production.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a production efficiency is high, and can be suitable for the pipe necking die of different pipe diameters.

In order to achieve the above object, the utility model adopts the following technical scheme: pipe necking die includes: the folding core rod is fixedly arranged on the base, the core rod is connected with a mold core, a detachable connecting structure is arranged between the mold core and the core rod, when the mold core is connected to the core rod, the central axis of the mold core and the central axis of the core rod are mutually overlapped, and the outer diameter of the core rod is not larger than that of the mold core; a plurality of first guide pillars are vertically and upwards arranged on a base, a stripping mechanism is fixedly connected to the first guide pillars, a template is arranged below the stripping mechanism and is in sliding connection with the first guide pillars, a plurality of second guide pillars are vertically and upwards arranged on the template and are in sliding connection with the second guide pillars, the second guide pillars upwards extend out of the stripping mechanism, a connecting plate is fixedly connected to the second guide pillars upwards extending out of the stripping mechanism, cylindrical holes penetrating through the upper end and the lower end of the template are formed in the template, a female die is connected to the template, a detachable connecting structure is arranged between the female die and the template, a material hole and a forming hole which are connected are sequentially arranged on the female die from top to bottom, the material hole and the forming hole penetrate through the upper end and the lower end of the female die, the inner diameter of the material hole is larger than that of the forming hole, the forming hole is aligned with the cylindrical holes, the forming hole is matched with the mold core, and a material hole is arranged, And the guide inclined plane extends from inside to outside.

Further, in the circular tube necking die, the core rod is formed by hinging a cylindrical first joint and a cylindrical second joint, and the connecting structure between the first joint and the second joint is as follows: the first joint is fixed on the base, a rectangular bulge is arranged at the top of the first joint, a first pin hole penetrating through the left side wall and the right side wall of the rectangular bulge is formed in the rectangular bulge, a rectangular groove penetrating through the front side wall and the rear side wall of the second joint is formed in the bottom of the second joint, avoidance inclined planes inclining from front to back are arranged on the two front side walls of the rectangular groove from top to bottom, a second pin hole communicating with the rectangular groove and penetrating through the left side wall and the right side wall of the second joint is formed in the second joint, the rectangular groove is sleeved on the rectangular bulge, the first pin hole and the second pin hole are aligned, and a connecting pin penetrates through the first pin hole and the second pin hole; the mold core is connected to the second joint.

Further, aforementioned pipe necking die, wherein, detachable connection structure between mold core and the second joint is: the die core is provided with a first countersunk through hole penetrating through the upper end and the lower end of the die core, the bottom of the die core is provided with a connecting hole which is concave upwards, the top of the second joint is provided with a connecting shaft which protrudes upwards, the top of the connecting shaft is provided with a first threaded hole downwards, the connecting hole on the die core is sleeved on the connecting shaft of the second joint, at the moment, the first countersunk through hole on the die core is aligned with the first threaded hole on the second joint, and the hexagon socket screw bolt penetrates downwards through the first countersunk through hole and then is connected with the first threaded hole.

Further, in the circular tube necking die, the connection structure between the first joint and the base is as follows: the top of base is provided with the clamp plate, has seted up the through-hole on the clamp plate, be provided with in the through-hole with base fixed connection's joint seat, has seted up the recess on joint seat, during first joint stretched into the recess, first joint passes through bolted connection to be fixed in the recess of joint seat, the cover is equipped with the fixed cover of ring on first joint, the fixed cover of ring is fixed on joint seat.

Further, in the circular tube necking die, a plurality of through holes are formed in the die plate, a copper first guide sleeve is arranged in each through hole, the first guide sleeves are sleeved on the corresponding first guide pillars, the female die is fixed to the bottom of the die plate through bolts, and the material holes and the forming holes in the female die are aligned to the cylindrical holes in the die plate.

Further, aforementioned circular tube necking die, wherein, take off the material mechanism and include: the bearing plate is fixedly connected with the first guide pillar, a cylindrical unloading block is vertically and downwards arranged on the bearing plate, the unloading plate is connected with the bearing plate through bolts, the unloading block is aligned with a cylindrical hole in the template, the unloading plate is matched with a forming hole in the female die, a plurality of through holes are formed in the bearing plate, a copper second guide sleeve is arranged in each through hole, and the second guide sleeves are sleeved on the corresponding second guide pillars.

Further, in the circular tube necking die, a fixing plate is fixedly connected between two first guide pillars located on the rear side of the base, a backup plate is arranged on the fixing plate, a U-shaped groove is formed in the front end of the backup plate, the U-shaped groove is arranged on the core rod in a blocking manner, and a gap is reserved between the U-shaped groove and the core rod.

Further, aforementioned pipe necking die, wherein, the left and right sides at the base is vertical respectively upwards to be provided with a first fixed rod, is connected with a gag lever post on two first fixed rods respectively, and connection structure between first fixed rod and the gag lever post is: the top end of the first fixed rod is provided with a second threaded hole, a second countersunk through hole penetrating through the upper end and the lower end of the limiting rod is formed in the limiting rod, the second countersunk through hole is aligned with the second threaded hole, the inner hexagonal bolt downwards penetrates through the second countersunk through hole and then is connected with the second threaded hole, the left side and the right side of the template are respectively and downwards provided with a second fixed rod, and the two second fixed rods are respectively aligned with the two limiting rods one by one.

The utility model has the advantages that: simple structure, convenient operation can be suitable for the pipe fitting of different pipe diameters, can carry out batch processing to the pipe fitting of different pipe diameters, has improved work efficiency greatly.

Drawings

Fig. 1 is a schematic perspective view of the circular tube necking die of the present invention.

Fig. 2 is a schematic sectional structure view of the circular tube necking die of the present invention.

Detailed Description

The technical solution of the present invention will be further explained with reference to the accompanying drawings and preferred embodiments.

As shown in fig. 1 and fig. 2, the circular tube necking die of the present invention comprises: base 1, the fixed cylindrical folding plug that is provided with on base 1, the plug comprises that columniform first joint 11 is articulated with second joint 12, and the connection structure between first joint 11 and the second joint 12 is: the first joint 11 is fixed on the base 1, a rectangular bulge 111 is arranged at the top of the first joint 11, the rectangular protrusion 111 is provided with a first pin hole 112 penetrating through the left and right side walls of the rectangular protrusion 111, a rectangular groove 121 which penetrates through the front and back side walls of the second joint 12 is arranged at the bottom of the second joint 12, an avoidance inclined plane 122 which inclines from top to bottom and from front to back is arranged on two front side walls of the rectangular groove 121, the second joint 12 is provided with a second pin hole 123 which is communicated with the rectangular groove 121 and penetrates through the left side wall and the right side wall of the second joint 12, the rectangular groove 121 is sleeved on the rectangular protrusion 111, the first pin hole 112 and the second pin hole 123 are aligned, a connecting pin is arranged in the first pin hole 112 and the second pin hole 123, so that the first joint 11 and the second joint 12 are hinged together, and the second joint 12 can rotate downwards around the connecting pin towards the direction of the inclined escape surface 122. A mold core 13 is connected to the second joint 12, and the connecting structure between the mold core 13 and the second joint 12 is as follows: a first countersunk through hole 131 penetrating through the upper end and the lower end of the mold core 13 is formed in the mold core 13, a connecting hole which is concave upwards is formed in the bottom of the mold core 13, a first thread 124 hole and a connecting shaft which protrudes upwards are formed in the top of the second joint 12, the connecting hole in the mold core 13 is sleeved on the connecting shaft on the second joint 12, at the moment, the first countersunk through hole 131 in the mold core 13 is aligned with the first thread hole 124 in the second joint 12, and an inner hexagonal bolt penetrates downwards through the first countersunk through hole 131 and then is connected with the first thread hole 124. The axis of first joint 11, second joint 12 coincides with the axis of mold core 13 each other, and the external diameter of first joint 11, second joint 12 is not more than the external diameter of mold core 13, vertically upwards is provided with four first guide pillars 14 on base 1, and fixedly connected with takes off the material mechanism on four first guide pillars 14, it includes to take off the material mechanism: the bearing plate 2 is fixedly connected with four first guide posts 14, a cylindrical unloading block 21 is vertically and downwards arranged on the bearing plate 2, a template 3 is arranged below the unloading mechanism, four through holes are arranged on the template 3, a first guide sleeve 31 made of copper is arranged in each through hole, the four first guide sleeves 31 are respectively sleeved on the corresponding first guide posts 14, so that the template 3 can slide up and down on the four first guide posts 14, a cylindrical hole 32 penetrating through the upper end and the lower end of the template 3 is arranged on the template 3, the cylindrical hole 32 is matched with the unloading block 21, a female die 4 is connected on the template 3, the female die 4 is fixedly connected on the template 3 through bolts, a material hole 41 and a forming hole 42 which are sequentially connected are arranged on the female die 4 from top to bottom, the material hole 41 and the forming hole 42 penetrate through the upper end and the lower end of the female die 4, the inner diameter of the material hole 41 is larger than the inner diameter of the forming hole 42, thus, in the process of necking the pipe fitting, the pipe section subjected to necking in the forming hole 42 extends into the material hole 41, so that the friction force between the forming hole 42 and the pipe fitting is reduced, the forming hole 42 on the female die 4 is aligned with the cylindrical hole 32 on the template 3, the forming hole 42 is matched with the mold core 13, and the bottom of the forming hole 42 is provided with a guide inclined plane which extends from top to bottom and from inside to outside. Four second guide posts 33 are vertically and upwardly arranged on the template 3, the bearing plate 2 is slidably connected with the four second guide posts 33, four through holes are arranged on the bearing plate 2, a copper second guide sleeve 22 is arranged in each through hole, the four second guide sleeves 22 are respectively sleeved on the corresponding second guide posts 33, the four second guide posts 33 upwards penetrate through the corresponding second guide sleeves 22 and then extend out of the bearing plate 2, connecting plates 5 are fixedly connected to the four second guide posts 33 upwards extending out of the bearing plate 2, and the connecting plates 5 can be connected with punches on a hydraulic press.

In this embodiment, a fixing plate 6 is fixedly connected between two first guide pillars 14 located at the rear side of the base 1, a backup plate 61 is arranged on the fixing plate 6, a U-shaped groove is arranged at the front end of the backup plate 61, the backup plate 61 is arranged on the second joint 12 in a blocking manner, a gap is left between the U-shaped groove in the backup plate 61 and the second joint 12, when pipe fittings with different pipe diameters are processed, the backup plate 61 with different specifications needs to be replaced, and it is ensured that the pipe fitting sleeved on a core rod can abut against the U-shaped groove on the backup plate 61.

In this embodiment, be provided with a first gag lever post 15 respectively vertically upwards in the left and right sides of base 1, be connected with a gag lever post 7 respectively on two first gag lever posts 15, connection structure between first gag lever post 15 and the gag lever post 7 is: the top end of the first fixed rod 15 is provided with a second threaded hole 151, the limiting rod 7 is provided with a second countersunk head through hole 71 penetrating through the upper end and the lower end of the limiting rod 7, the second countersunk head through hole 71 is aligned with the second threaded hole 151, and the inner hexagonal bolt downwards penetrates through the second countersunk head through hole 71 and then is connected with the second threaded hole 151, so that the limiting rod 7 is fixed on the first fixed rod 15, the left side and the right side of the template 3 are respectively and downwards provided with a second fixed rod 34, and the two second fixed rods 34 are respectively aligned with the two limiting rods 7 one by one.

In this embodiment, the connection structure between the first joint 11 and the base 1 is: be provided with clamp plate 16 at the top of base 1, seted up the through-hole on clamp plate 16, be provided with in the through-hole with base 1 fixed connection's joint seat 8, seted up flutedly on joint seat 8, first joint 11 stretches into in the recess, and first joint 11 passes through bolted connection to be fixed in the recess of joint seat 8, and the cover is equipped with the fixed cover 81 of ring on first joint 11, and the fixed cover 81 of ring is fixed on joint seat 8. This coupling structure enables the first joint 11 to be more firmly fixed to the base 1.

The specific working process of the circular tube necking die with the structure is as follows: fixing the base 1 on a platform of a hydraulic press, connecting the connecting plate 5 with a punch on the hydraulic press, replacing the matched mold core 13, the female mold 4 and the backup plate 61 according to the pipe diameter of the pipe to be processed, then rotating the second joint 12 connected with the mold core 13 downwards around a hinge point until the avoidance inclined plane 122 on the second joint 12 abuts against the first joint 11, then sleeving the pipe to be processed on the mold core 13 and the second joint 12, then rotating the second joint 12 upwards around the hinge point until the second joint 12 is vertical on the first joint 11, at the moment, sliding the pipe to be sleeved on the first joint 11 downwards, and abutting the pipe against the U-shaped groove of the backup plate 61. After the pipe fitting is fixed, a punch on a hydraulic press is started, the punch drives a connecting plate 5 to move downwards, the connecting plate 5 drives a template 3 through four second guide posts 33 to drive a female die 4 to move downwards along a first guide post 14, in the downward movement process, a guide inclined plane on a forming hole 42 on the female die 4 firstly abuts against the end of the pipe fitting, then the forming hole 42 is gradually guided to contact with the end of the pipe fitting through the guide inclined plane, the female die 4 continues to move downwards, the forming hole 42 extrudes the pipe fitting, so that the pipe fitting is reduced, in the descending process, a second fixed rod 34 on the template 3 abuts against a limiting rod 7, when the second fixed rod 34 abuts against the limiting rod 7, the pipe fitting reducing operation is finished, then the punch drives the connecting plate 5 to drive the template to move upwards along the first guide post 14, in the upward movement process, the processed pipe fitting is easy to be clamped on the forming hole 42 and moves upwards together with the female die 4, after moving upward to a certain height, the stripper plate 21 can pass through the cylindrical hole 32 and the material hole 41 on the template 3 and then extend into the forming hole 42 of the female die 4, the stripper plate 21 can push away the pipe fitting clamped in the forming hole 42 downward, the pipe fitting can fall back on the mandrel below, and after a worker grasps the pipe fitting and lifts upward to a height higher than the first joint 11, the worker rotates the second joint 12 downward, so that the second joint 12 is folded on the first joint 11, and the machined pipe fitting can be taken down.

Claims

1. Pipe necking die includes: base, its characterized in that: a cylindrical folding core rod is fixedly arranged on the base, a core rod is connected onto the core rod, a detachable connecting structure is arranged between the core rod and the core rod, when the core rod is connected onto the core rod, the central axis of the core rod and the central axis of the core rod are mutually overlapped, and the outer diameter of the core rod is not larger than that of the core rod; a plurality of first guide pillars are vertically and upwards arranged on a base, a stripping mechanism is fixedly connected to the first guide pillars, a template is arranged below the stripping mechanism and is in sliding connection with the first guide pillars, a plurality of second guide pillars are vertically and upwards arranged on the template and are in sliding connection with the second guide pillars, the second guide pillars upwards extend out of the stripping mechanism, a connecting plate is fixedly connected to the second guide pillars upwards extending out of the stripping mechanism, cylindrical holes penetrating through the upper end and the lower end of the template are formed in the template, a female die is connected to the template, a detachable connecting structure is arranged between the female die and the template, a material hole and a forming hole which are connected are sequentially arranged on the female die from top to bottom, the material hole and the forming hole penetrate through the upper end and the lower end of the female die, the inner diameter of the material hole is larger than that of the forming hole, the forming hole is aligned with the cylindrical holes, the forming hole is matched with the mold core, and a material hole is arranged, And the guide inclined plane extends from inside to outside.

2. The round tube necking die of claim 1, wherein: the core rod is formed by hinging a cylindrical first joint and a cylindrical second joint, and the connecting structure between the first joint and the second joint is as follows: the first joint is fixed on the base, a rectangular bulge is arranged at the top of the first joint, a first pin hole penetrating through the left side wall and the right side wall of the rectangular bulge is formed in the rectangular bulge, a rectangular groove penetrating through the front side wall and the rear side wall of the second joint is formed in the bottom of the second joint, avoidance inclined planes inclining from front to back are arranged on the two front side walls of the rectangular groove from top to bottom, a second pin hole communicating with the rectangular groove and penetrating through the left side wall and the right side wall of the second joint is formed in the second joint, the rectangular groove is sleeved on the rectangular bulge, the first pin hole and the second pin hole are aligned, and a connecting pin penetrates through the first pin hole and the second pin hole; the mold core is connected to the second joint.

3. The round tube necking die of claim 2, wherein: the detachable connection structure between mold core and the second joint is: the die core is provided with a first countersunk through hole penetrating through the upper end and the lower end of the die core, the bottom of the die core is provided with a connecting hole which is concave upwards, the top of the second joint is provided with a connecting shaft which protrudes upwards, the top of the connecting shaft is provided with a first threaded hole downwards, the connecting hole on the die core is sleeved on the connecting shaft of the second joint, at the moment, the first countersunk through hole on the die core is aligned with the first threaded hole on the second joint, and the hexagon socket screw bolt penetrates downwards through the first countersunk through hole and then is connected with the first threaded hole.

4. The round tube necking die of claim 2 or 3, wherein: the connecting structure between the first joint and the base is as follows: the top of base is provided with the clamp plate, has seted up the through-hole on the clamp plate, be provided with in the through-hole with base fixed connection's joint seat, has seted up the recess on joint seat, during first joint stretched into the recess, first joint passes through bolted connection to be fixed in the recess of joint seat, the cover is equipped with the fixed cover of ring on first joint, the fixed cover of ring is fixed on joint seat.

5. The round tube necking die of claim 1, 2 or 3, wherein: the die plate is provided with a plurality of through holes, a copper first guide sleeve is arranged in each through hole, the first guide sleeves are sleeved on the corresponding first guide pillars, the female die is fixed at the bottom of the die plate through bolts, and the material holes and the forming holes in the female die are aligned with the cylindrical holes in the die plate.

6. The round tube necking die of claim 1, 2 or 3, wherein: the stripping mechanism comprises: the bearing plate is fixedly connected with the first guide pillar, a cylindrical unloading block is vertically and downwards arranged on the bearing plate, the unloading plate is connected with the bearing plate through bolts, the unloading block is aligned with a cylindrical hole in the template, the unloading plate is matched with a forming hole in the female die, a plurality of through holes are formed in the bearing plate, a copper second guide sleeve is arranged in each through hole, and the second guide sleeves are sleeved on the corresponding second guide pillars.

7. The round tube necking die of claim 1, 2 or 3, wherein: a fixing plate is fixedly connected between two first guide pillars positioned on the rear side of the base, a backup plate is arranged on the fixing plate, a U-shaped groove is formed in the front end of the backup plate, the U-shaped groove is arranged on the core rod in a blocking mode, and a gap is reserved between the U-shaped groove and the core rod.

8. The round tube necking die of claim 1, 2 or 3, wherein: the left and right sides at the base is vertical respectively and upwards is provided with a first fixed rod, is connected with a gag lever post respectively on two first fixed rods, and connection structure between first fixed rod and the gag lever post is: the top end of the first fixed rod is provided with a second threaded hole, a second countersunk through hole penetrating through the upper end and the lower end of the limiting rod is formed in the limiting rod, the second countersunk through hole is aligned with the second threaded hole, the inner hexagonal bolt downwards penetrates through the second countersunk through hole and then is connected with the second threaded hole, the left side and the right side of the template are respectively and downwards provided with a second fixed rod, and the two second fixed rods are respectively aligned with the two limiting rods one by one.