CN116809754A

CN116809754A - Bent pipe type clamping and pressing pipe forming device and application method thereof

Info

Publication number: CN116809754A
Application number: CN202310840848.4A
Authority: CN
Inventors: 王跃鹏
Original assignee: Hebei Longjin Pipeline Equipment Co ltd
Current assignee: Hebei Longjin Pipeline Equipment Co ltd
Priority date: 2023-07-10
Filing date: 2023-07-10
Publication date: 2023-09-29

Abstract

The invention discloses a bent pipe type clamping and pressing pipe forming device and a using method thereof, and belongs to the technical field of clamping and pressing pipe forming. A working table of the forming device is provided with a fixed die, the middle part of the fixed die is provided with a convex block, and two sides of the convex block are symmetrically provided with a plurality of lower die cavities; a movable die is arranged above the fixed die, a groove matched with the boss is arranged in the middle of the movable die, and upper die cavities corresponding to the lower die cavities one by one are symmetrically arranged on two sides of the groove; the workbench is provided with a power mechanism for driving the movable die to lift; the two sides of the fixed die are provided with lower punches, a sliding mechanism driving the lower punches to slide is arranged on the workbench, an upper punch is arranged above the movable die, and a lifting mechanism driving the upper punch to lift is arranged on the movable die; the workbench is provided with a water collecting tank which is positioned at two sides of the fixed die. The bent pipe type clamping and pressing pipe forming device and the application method thereof can solve the problem that the production efficiency of the existing bent pipe type clamping and pressing pipe is low.

Description

Bent pipe type clamping and pressing pipe forming device and application method thereof

Technical Field

The invention relates to the technical field of clamping and pressing pipe forming, in particular to a bent pipe type clamping and pressing pipe forming device and a using method thereof.

Background

The clamping and pressing pipe is a socket pipe fitting connecting pipeline with a special sealing ring, the special sealing ring is arranged at the connecting port of the clamping and pressing pipe, and then a tool is adopted to press the pipe orifice and the pipeline to form a sealed permanent connecting port, so that the pipe has the characteristics of leakage prevention, pull resistance, vibration resistance, high pressure resistance and the like, and is suitable for connecting pipelines such as water, oil, gas and the like.

The existing clamping and pressing pipe can be divided into a straight pipe clamping and pressing pipe and a bent pipe clamping and pressing pipe according to the shape, the production modes of the straight pipe clamping and pressing pipe are more, the pipe end forming machine and the cold header can be adopted for forming production, and the water expansion forming can also be adopted for production. However, the bent pipe type clamping and pressing pipe is produced by adopting water expansion molding generally due to the bent pipe structure.

The water expansion forming is to use a pipe as a blank, apply axial thrust to two ends of a pipe blank while applying ultrahigh-pressure liquid in the pipe, and perform material supplementing. Under the combined action of the two external forces, the tube blank material is subjected to plastic deformation and finally is attached to the inner wall of the die cavity, so that the hollow part with the shape and the precision meeting the technical requirements is obtained. When the pipe bending clamp pipe is formed by water expansion, the punch heads are required to be propped against the two ends of the pipe blank, and the pipe blank is limited by the punch heads and the pipe bending structure, so that only one pipe blank is generally processed at a time, and the production efficiency is relatively low.

Disclosure of Invention

The invention aims to provide a bent pipe type clamping and pressing pipe forming device and a using method thereof, which solve the problem that the production efficiency of the existing bent pipe type clamping and pressing pipe is lower.

In order to achieve the above purpose, the invention provides a bent pipe type clamping and pressing pipe forming device, which comprises a workbench, wherein a fixed mold is arranged on the workbench, a lug is arranged in the middle of the fixed mold, and a plurality of lower mold cavities are symmetrically arranged on two sides of the lug; a movable die is arranged above the fixed die, a groove matched with the boss is arranged in the middle of the movable die, and upper die cavities corresponding to the lower die cavities one by one are symmetrically arranged on two sides of the groove; the workbench is provided with a power mechanism for driving the movable die to lift; the two sides of the fixed die are provided with lower punches corresponding to the lower die cavities one by one, the workbench is provided with a sliding mechanism for driving the lower punches to slide on the workbench, an upper punch corresponding to the upper die cavities one by one is arranged above the movable die, and the movable die is provided with a lifting mechanism for driving the upper punches to lift; the workbench is provided with a water collecting tank which is positioned at two sides of the fixed die.

Preferably, the power mechanism comprises a fixed plate arranged above the workbench, the fixed plate is connected with the workbench through a supporting plate, third hydraulic cylinders are arranged at two ends of the fixed plate, and telescopic rods of the third hydraulic cylinders are connected with the movable die; sliding sleeves are arranged on the two end faces of the movable mould, and are sleeved on the supporting plate and are in sliding connection with the supporting plate.

Preferably, the upper die cavity comprises a round hole arranged above the groove and a semicircular arc groove arranged on the side wall of the groove and the bottom surface of the movable die.

Preferably, the sliding mechanism comprises a sliding seat, a first installation seat for installing the lower punch in a plurality of ways is arranged above the sliding seat, a first locking structure for locking the lower punch is arranged on the first installation seat, a sliding block is arranged on the lower surface of the sliding seat, a sliding groove for guiding the sliding of the sliding seat, which is inserted by the sliding block, is arranged on a working table, the sliding block is in sliding connection with the sliding groove, a first hydraulic cylinder is arranged on the working table, and a telescopic rod of the first hydraulic cylinder is connected with the sliding seat.

Preferably, the slide is provided with an arc-shaped third mounting groove for placing the lower punch, the first mounting seat is provided with a positioning groove for positioning the lower punch, and the upper part of the positioning groove is provided with a limiting plane matched with the plane of the end head of the lower punch.

Preferably, the first locking structure is arranged on two sides of the first mounting seat, the first locking structure comprises a bolt, a fourth mounting hole for allowing the bolt to be inserted is formed in the first mounting seat, a guide plate with a guiding function on sliding of the bolt is arranged on one section of the bolt inside the fourth mounting hole, a third spring for allowing the bolt to be inserted into insertion holes formed in two sides of the lower punch is arranged between the guide plate and the fourth mounting hole, and a pull ring is arranged on an exposed end of the bolt.

Preferably, the lifting mechanism comprises a second hydraulic cylinder, the second hydraulic cylinder is arranged on a mounting plate, the mounting plate is connected with the movable mould through a supporting rod, a sliding plate is arranged on a telescopic rod of the second hydraulic cylinder, an upper punch is arranged on the sliding plate through a second mounting seat, a fixing groove for placing the second mounting seat is formed in the sliding plate, and a second locking structure for locking the second mounting seat is arranged on the fixing groove; the slide plate is provided with a guide hole for the support rod to pass through.

Preferably, the sliding plate is provided with a first mounting groove matched with the shape of the mounting block of the upper punch head, two planes are oppositely arranged on the side face of the circular mounting block to serve as limiting surfaces, the second mounting seat is provided with a first coaxial mounting hole and a second mounting hole, the shape of the first mounting hole is matched with the mounting block, the depth of the first mounting hole is smaller than the height of the mounting block, and the second mounting hole is a round hole.

Preferably, the second locking structure comprises locking blocks distributed in a circumferential array around a second mounting seat, locking holes corresponding to the locking blocks one by one are formed in the second mounting seat, second mounting grooves for accommodating the locking blocks are formed in the side walls of the fixing grooves, guide blocks are arranged on two sides of the locking blocks, guide grooves matched with the guide blocks are formed in the second mounting grooves, and a first spring for inserting the locking blocks into the locking holes is arranged between the locking blocks and the second mounting grooves; the inside of latch segment is provided with the power hole, and one side that the second mount pad was kept away from to the power hole is the inclined plane of outside slope, is provided with the third mounting hole that makes the push rod pass on the slide, and the one end and the inclined plane contact of power hole of push rod stretch out through the linkage board between the one end of slide to be connected, is provided with the second spring between slide and the linkage board, and the second spring cover is established on the push rod.

The application method based on the bent pipe type clamping and pressing pipe forming device comprises the following steps of:

s1, placing a tube blank into a lower die cavity, starting a third hydraulic cylinder, driving a movable die to be pressed on a fixed die by the third hydraulic cylinder, and combining an upper die cavity with a corresponding lower die cavity to form a complete forming die cavity;

s2, starting a first hydraulic cylinder and a second hydraulic cylinder, wherein the first hydraulic cylinder drives a sliding seat to slide on a workbench, and the sliding seat drives a lower punch to be inserted into a forming cavity through a first mounting seat; the second hydraulic cylinder drives the sliding plate to slide downwards along the supporting rod, and the sliding plate drives the upper punch to be inserted into the upper die cavity of the movable die;

s3, filling medium-pressure emulsified water into a forming cavity through an ultrahigh pressure generating device, and preforming a tube blank through an upper punch and a lower punch;

s4, continuously extending the first hydraulic cylinder and the second hydraulic cylinder, extruding the tube blank by the upper punch and the lower punch, filling ultrahigh-pressure emulsified water into the forming cavity by the ultrahigh-pressure generating device, and processing and forming the tube blank;

s5, the first hydraulic cylinder and the second hydraulic cylinder shrink, the upper punch and the lower punch withdraw from the forming cavity, the third hydraulic cylinder shrink, the movable die moves upwards, and the formed clamping and pressing pipe is taken down from the fixed die.

The bent pipe type clamping and pressing pipe forming device and the using method thereof have the advantages that:

1. the middle part at the cover half sets up the lug, sets up the recess at the middle part of movable mould, utilizes lug and recess processing and the corresponding shaping chamber of right angle return bend to can all set up a plurality of die cavities in the both sides of cover half, once can realize the shaping of a plurality of curved pipe formula card pressure pipes, improve fashioned efficiency. And the symmetrical arrangement is beneficial to reducing the volume of the die.

2. The upper die cavity and the lower die cavity are combined to form a vertical forming cavity, when a pipe blank is formed, emulsified water injected through the upper punch is easy to flow out from the die cavity at the side of the lower punch under the action of gravity, and is collected in water collecting grooves arranged at two sides of the fixed die, so that the emulsified water is easy to collect, and the pollution of the emulsified water to a workbench is also reduced.

3. The upper punch is in locking connection with the first mounting seat through the first locking structure, and the upper punch is very convenient to install and detach.

4. The lower punch is connected with the sliding plate through the second mounting seat, and the lower punch is stably mounted. The second mount pad is connected with the slide locking through second locking structure, just can realize the installation and the dismantlement of lower drift through promoting the linkage board, and lower drift installation and dismantlement are very convenient.

The technical scheme of the invention is further described in detail through the drawings and the embodiments.

Drawings

FIG. 1 is a schematic diagram of a bent pipe type clamping and pressing pipe forming device and a using method thereof according to an embodiment of the present invention;

FIG. 2 is a schematic top view of a bent pipe type clamping and pressing pipe forming device and an embodiment of a using method thereof;

FIG. 3 is a schematic diagram of a structure of a fixed mold of an embodiment of a bent pipe type clamping and pressing pipe forming device and a using method thereof;

FIG. 4 is a schematic diagram of a movable mold structure of an embodiment of a bent pipe type clamping and pressing pipe forming device and a using method thereof;

FIG. 5 is a schematic diagram of an upper punch mounting structure of an elbow type clamping and pressing pipe forming device and an embodiment of a using method thereof;

FIG. 6 is a schematic diagram of a second mounting seat of an embodiment of a bent pipe type clamping and pressing pipe forming device and a using method thereof;

FIG. 7 is a schematic view of a first mounting seat of an embodiment of a bent pipe type clamping and pressing pipe forming device and a using method thereof;

fig. 8 is a schematic diagram of a lower punch mounting structure of an elbow type clamping and pressing pipe forming device and an application method embodiment of the invention.

Reference numerals

1. A work table; 2. a fixed mold; 3. a lower die cavity; 4. a movable mold; 5. an upper die cavity; 6. a bump; 7. a groove; 8. a lower punch; 9. a slide; 10. a first mount; 11. a first hydraulic cylinder; 12. a slide block; 13. a chute; 14. an upper punch; 15. a mounting block; 16. a mounting plate; 17. a support rod; 18. a slide plate; 19. a second mounting base; 20. a linkage plate; 21. a second hydraulic cylinder; 22. a guide hole; 23. a water collection tank; 24. a fixing plate; 25. a support plate; 26. a third hydraulic cylinder; 27. a pull ring; 28. a limiting surface; 29. a first mounting groove; 30. a fixing groove; 31. a first mounting hole; 32. a second mounting hole; 33. a locking block; 34. a second mounting groove; 35. a guide groove; 36. a first spring; 37. a power hole; 38. a push rod; 39. a third mounting hole; 40. a second spring; 41. a locking hole; 42. a third mounting groove; 43. a positioning groove; 44. a fourth mounting hole; 45. a plug pin; 46. a guide plate; 47. a third spring; 48. and a jack.

Detailed Description

The technical scheme of the invention is further described below through the attached drawings and the embodiments.

Unless defined otherwise, technical or scientific terms used herein should be given the ordinary meaning as understood by one of ordinary skill in the art to which this invention belongs. The terms "first," "second," and the like, as used herein, do not denote any order, quantity, or importance, but rather are used to distinguish one element from another. The word "comprising" or "comprises", and the like, means that elements or items preceding the word are included in the element or item listed after the word and equivalents thereof, but does not exclude other elements or items. The terms "connected" or "connected," and the like, are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "upper", "lower", "left", "right", etc. are used merely to indicate relative positional relationships, which may also be changed when the absolute position of the object to be described is changed.

Examples

As shown in figures 1-8, the bent pipe type clamping and pressing pipe forming device comprises a workbench 1, wherein the workbench 1 is a rectangular table, and the workbench 1 is fixed on the ground or a working plane. The workbench 1 is provided with a fixed die 2, the fixed die 2 is positioned in the middle of the workbench 1, and the fixed die 2 is fixed on the workbench 1 through screws. The middle part of cover half 2 is provided with lug 6, and lug 6 sets up along the length direction of cover half 2. The two sides of the convex block 6 are symmetrically provided with a plurality of lower die cavities 3, and the lower die cavities 3 are of an L-shaped semicircular arc structure and are used for placing pipe blanks of bent pipes.

The top of cover half 2 is provided with movable mould 4, and the middle part of movable mould 4 is provided with the recess 7 with boss looks adaptation, and the bilateral symmetry of recess 7 is provided with the last die cavity 5 with lower die cavity 3 one-to-one. The upper die cavity 5 is provided with an upper part and a lower part, the upper part is a round hole arranged above the groove 7, the lower part is a semicircular arc groove arranged on the side wall of the groove 7 and the bottom surface of the movable die 4, and the side wall of the round hole is on the same plane with the semicircular arc groove on the side wall of the groove 7. The upper mold cavity 5 and the lower mold cavity 3 are combined to form a complete molding cavity.

The workbench 1 is provided with a power mechanism for driving the movable mould 4 to lift. The power mechanism comprises a fixed plate 24 arranged above the workbench 1, and the fixed plate 24 is parallel to the workbench 1. The fixed plate 24 is connected with the workbench 1 through a supporting plate 25, and two ends of the supporting plate 25 are fixedly connected with the workbench 1 and the fixed plate 24 through bolts or welding respectively. The both ends of fixed plate 24 are fixedly provided with third pneumatic cylinder 26, and the telescopic link of third pneumatic cylinder 26 and movable mould 4 fixed connection. Sliding sleeves are fixedly arranged on two end faces of the movable mould 4, are sleeved on the supporting plate 25 and are in sliding connection with the supporting plate 25. The sliding sleeve and the supporting plate 25 have guiding function on the sliding of the movable die 4. The two third hydraulic cylinders 26 work simultaneously to drive the movable die 4 to move up and down along the supporting plate 25, thereby completing the die closing and opening actions.

The two sides of the fixed die 2 are provided with lower punches 8 which are in one-to-one correspondence with the lower die cavities 3. The workbench 1 is provided with a sliding mechanism for driving the lower punch 8 to slide on the workbench 1. The sliding mechanism comprises a sliding seat 9, a plurality of first installation seats 10 for installing the lower punch 8 are arranged above the sliding seat 9, the first installation seats 10 are perpendicular to the sliding seat 9, the first installation seats 10 are fixed on the sliding seat 9 through screws or welding, and the sliding seat 9 and the first installation seats 10 can be of an integrated structure. The first mounting seats 10 are in one-to-one correspondence with the lower punches 8. A slide block 12 is fixedly arranged on the lower surface of the slide carriage 9, a slide groove 13 which is used for guiding the sliding of the slide carriage 9 and is inserted by the slide block 12 is arranged on the workbench 1, and the slide block 12 is in sliding connection with the slide groove 13. Two sliding grooves 13 are arranged on the workbench 1, and the two sliding grooves 13 are positioned at two ends of the sliding seat 9. The chute 13 may be a dovetail or a T-slot. The workbench 1 is provided with a first hydraulic cylinder 11, and a telescopic rod of the first hydraulic cylinder 11 is fixedly connected with the sliding seat 9. The first hydraulic cylinder 11 is located in the middle of the sliding seat 9, and the first hydraulic cylinder 11 drives the lower punch 8 to slide on the workbench 1 through the sliding seat 9 and the first mounting seat 10, so that the lower punch 8 is inserted into or pulled out of the corresponding lower die cavity 3.

The slide 9 is provided with an arc-shaped third mounting groove 42 for placing the lower punch 8, and the third mounting groove 42 improves the stability of placing the lower punch 8 on the slide 9. The first mounting seat 10 is provided with a positioning groove 43 for positioning the lower punch 8, and the positioning groove 43 is a circular groove with a limiting plane arranged on the upper part. The shape of the positioning groove 43 is matched with the shape of the end head of the lower punch 8, the end head of the lower punch 8 is just inserted into the positioning groove 43, and the step surface of the lower punch 8 is abutted against the side surface of the first mounting seat 10. The limiting plane limits the rotation of the lower punch 8, and the stability of the installation of the lower punch 8 is improved.

The first mounting base 10 is provided with a first locking structure for locking the lower punch 8. The first locking structure is provided at both sides of the first mount 10. The first locking structure includes a latch 45, and the latch 45 is cylindrical. The first mount 10 is provided with a fourth mounting hole 44 into which a plug 45 is inserted. A guide plate 46 having a guide function for sliding of the latch 45 is provided on a section of the latch 45 located inside the fourth mounting hole 44. The guide plate 46 is a circular plate, and the size of the guide plate 46 is slightly smaller than the aperture of the fourth mounting hole 44 so that the guide plate 46 can slide in the fourth mounting hole 44. A third spring 47 is arranged between the guide plate 46 and the fourth mounting hole 44, and the third spring 47 is sleeved outside the bolt 45. The third spring 47 inserts the pins 45 into insertion holes 48 provided on both sides of the lower punch 8. A pull ring 27 is fixedly arranged on the exposed end of the bolt 45.

When the lower punch 8 is installed, the bolt 45 is pulled outwards through the pull ring 27, the third spring 47 is compressed, the bolt 45 enters the fourth installation hole 44, the lower punch 8 is placed in the third installation groove 42, the lower punch 8 is pushed into the positioning groove 43, the lower punch 8 is positioned, the pull ring 27 is loosened, and the bolt 45 is inserted into the insertion hole 48 under the elasticity of the third spring 47, so that locking and fixing of the lower punch 8 are completed. When the lower punch 8 is dismounted, the plug pin 45 is pulled outwards through the pull ring 27, the third spring 47 is compressed, the plug pin 45 is pulled out from the jack 48, and the lower punch 8 is pushed outwards, so that the lower punch 8 can be dismounted. The mounting and dismounting of the lower punch 8 is very convenient.

An upper punch 14 corresponding to the upper die cavity 5 one by one is arranged above the movable die 4. The movable die 4 is provided with a lifting mechanism for driving the upper punch 14 to lift. The lifting mechanism comprises a second hydraulic cylinder 21, and the second hydraulic cylinder 21 is fixedly arranged on the mounting plate 16. The second hydraulic cylinder 21 is located in the center of the mounting plate 16. The mounting plate 16 is connected with the movable mould 4 through a supporting rod 17. The bracing piece 17 sets up on the four angles of mounting panel 16, and the both ends of bracing piece 17 are fixed connection with mounting panel 16, movable mould 4 respectively. The support bar 17 is used to support the mounting plate 16. A slide plate 18 is fixedly arranged on the telescopic rod of the second hydraulic cylinder 21, and the telescopic rod of the second hydraulic cylinder 21 is positioned in the center of the slide plate 18. The slide plate 18 and the mounting plate 16 are both horizontally arranged. The slide plate 18 is provided with a guide hole 22 through which the support rod 17 passes, and the guide hole 22 and the support rod 17 have a guiding function for vertical up-and-down sliding of the slide plate 18. The upper punch 14 is mounted on the slide plate 18 by a second mount 19.

The slide plate 18 is provided with a first mounting groove 29 which is adapted to the shape of the mounting block 15 at the end of the upper punch 14. The mounting block 15 is a cylindrical structure provided with two opposed parallel flat surfaces on the side surfaces, the two opposed flat surfaces serving as the limit surfaces 28 on which the upper punch 14 is mounted. The upper punch 14 is positioned and restrained with the slide plate 18 by a restraining surface 28. The second mounting seat 19 is provided with a first mounting hole 31 and a second mounting hole 32 which are coaxial. The shape of the first mounting hole 31 is matched with the mounting block 15, and the upper punch 14 is positioned and limited with the second mounting seat 19 through the first mounting hole 31. The depth of the first mounting hole 31 is smaller than the height of the mounting block 15, so that the upper punch 14 is tightly abutted against the sliding plate 18 through the second mounting seat 19, and the mounting stability of the upper punch 14 is improved. The second mounting hole 32 is a circular hole. The hole diameter of the circular hole is slightly larger than the diameter of the lower punch 8 so that the lower punch 8 passes out of the second mounting hole 32.

The slide plate 18 is provided with a fixing groove 30 for placing the second mounting seat 19, and the fixing groove 30 is provided with a second locking structure for locking the second mounting seat 19. The second locking arrangement comprises locking blocks 33 distributed in a circumferential array around the second mounting block 19. The second mounting seat 19 is provided with locking holes 41 corresponding to the locking blocks 33 one by one, and the locking blocks 33 are inserted into the locking holes 41 to realize locking and fixing between the second mounting seat 19 and the sliding plate 18. The side wall of the fixing groove 30 is provided with a second mounting groove 34 accommodating the locking piece 33. Two sides of the locking block 33 are respectively provided with a guide block, the inside of the second installation groove 34 is provided with a guide groove 35 which is matched with the guide block, and the guide groove 35 is arranged along the length direction of the second installation groove 34. The guide block is located in the guide groove 35 and slides in the guide groove 35, and the guide groove 35 has a guiding function for the sliding of the lock block 33. A first spring 36 for inserting the locking piece 33 into the locking hole 41 is provided between the locking piece 33 and the second mounting groove 34.

The locking block 33 is internally provided with a power hole 37, and one side of the power hole 37 away from the second mounting seat 19 is an inclined surface which is inclined outwards. The slide plate 18 is provided with a third mounting hole 39 for the push rod 38 to pass through, and the aperture of the third mounting hole 39 is slightly larger than the diameter of the push rod 38, so that the push rod 38 can slide in the third mounting hole 39. The push rod 38 extends out of one end of the slide plate 18 and is connected with the slide plate 20, and the slide plate 20 is fixedly connected with the push rod 38 through a screw. The linkage plate 20 is a circular plate, and the push rods 38 are connected together, so that the push rods 38 can be driven to synchronously slide by one linkage plate 20. A second spring 40 is arranged between the sliding plate 18 and the linkage plate 20, and the second spring 40 is sleeved on the push rod 38. One end of the push rod 38 is in contact with the inclined surface of the power hole 37 by the second spring 40. One end of the push rod 38, which is contacted with the power hole 37, is provided with an inclined plane, so that the contact area of the push rod 38 and the inclined plane of the power hole 37 is increased, and the contact stability of the push rod 38 and the locking block 33 is improved.

In order to prevent the push rod 38 from sliding out of the third mounting hole 39, a limiting groove is formed in the side wall of the third mounting hole 39, a limiting block is fixedly arranged on the push rod 38, and the limiting block is located in the limiting groove and slides in the limiting groove. The limiting groove has a blocking effect on the limiting block, and the push rod 38 is prevented from sliding out of the third mounting hole 39.

A certain gap is reserved between the upper surface of the locking block 33 and the second mounting hole 32, so that the push rod 38 can conveniently pass through the power hole 37.

When the upper punch 14 is installed, the installation block 15 of the upper punch 14 is placed into the first installation hole 31 of the second installation seat 19, the upper punch 14 penetrates out of the second installation hole 32, the linkage plate 20 is pushed upwards, the linkage plate 20 drives the push rod 38 to move upwards, the second spring 40 is compressed, the push rod 38 pushes the locking block 33 to move outwards through the inclined plane of the power hole 37, the end head of the locking block 33 is received into the second installation groove 34, the first spring 36 is compressed, the second installation seat 19 is placed into the fixed groove 30, and the installation block 15 is inserted into the first installation groove 29; and the linkage plate 20 is loosened, the linkage plate 20 moves downwards under the action of the second spring 40, the linkage plate 20 drives the push rod 38 to move downwards, the locking block 33 is automatically inserted into the locking hole 41 under the action of the first spring 36, the second mounting seat 19 is locked, and the upper punch 14 is mounted.

When the upper punch 14 is dismounted, the linkage plate 20 is pushed upwards, the linkage plate 20 drives the push rod 38 to move upwards, the second spring 40 is compressed, the push rod 38 pushes the locking block 33 to move outwards through the inclined plane of the power hole 37, the end head of the locking block 33 is pulled out of the locking hole 41, the first spring 36 is compressed, the second mounting seat 19 is taken out of the fixing groove 30, and the dismounting of the upper punch 14 is completed.

The workbench 1 is fixedly provided with a water collecting tank 23, and the water collecting tank 23 is positioned at two sides of the fixed die 2. The water collecting tank 23 is used for collecting high-pressure medium emulsified water used in the forming process, so that the emulsified water can be conveniently recycled.

The center of the upper punch 14 is provided with a through hole for introducing emulsified water into the molding cavity, and the through hole is connected with an existing high-pressure generating device through a connecting pipe. The slide plate 18 is provided with a through hole at a corresponding position through which the connection pipe passes. The high-pressure generating device makes high-pressure emulsified water enter the forming cavity through the connecting pipe and the through hole of the upper punch 14 to form the pipe blank.

s1, placing a tube blank into a lower die cavity 3, starting a third hydraulic cylinder 26, driving a movable die 4 to be pressed on a fixed die 2 by the third hydraulic cylinder 26, inserting the top end of the tube blank into an upper die cavity 5, and combining the upper die cavity 5 with a corresponding lower die cavity 3 to form a complete forming die cavity;

s2, starting a first hydraulic cylinder 11 and a second hydraulic cylinder 21, wherein the first hydraulic cylinder 11 drives a sliding seat 9 to slide on the workbench 1, and the sliding seat 9 drives a lower punch 8 to synchronously insert into a forming cavity through a first mounting seat 10; the second hydraulic cylinder 21 drives the sliding plate 18 to slide downwards along the supporting rod 17, and the sliding plate 18 drives the upper punch 14 to synchronously insert into the upper die cavity 5 of the movable die 4;

s3, filling medium-pressure emulsified water into a forming cavity through an ultrahigh pressure generating device, and preforming a pipe blank by an upper punch 14 and a lower punch 8;

s4, continuously extending the first hydraulic cylinder 11 and the second hydraulic cylinder 21, extruding the pipe blank by the upper punch 14 and the lower punch 8, filling ultrahigh-pressure emulsified water into a forming cavity by an ultrahigh-pressure generating device, and processing and forming the pipe blank;

s5, the first hydraulic cylinder 11 and the second hydraulic cylinder 21 shrink, the upper punch 14 and the lower punch 8 withdraw from the forming cavity, the third hydraulic cylinder 26 shrinks, the movable die 4 moves upwards, and the formed clamping and pressing pipe is taken off from the fixed die 2.

Therefore, the bent pipe type clamping and pressing pipe forming device and the application method thereof can solve the problem that the production efficiency of the existing bent pipe type clamping and pressing pipe is low.

Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present invention and not for limiting it, and although the present invention has been described in detail with reference to the preferred embodiments, it will be understood by those skilled in the art that: the technical scheme of the invention can be modified or replaced by the same, and the modified technical scheme cannot deviate from the spirit and scope of the technical scheme of the invention.

Claims

1. The utility model provides a return bend formula card presses pipe forming device which characterized in that: the device comprises a workbench, wherein a fixed die is arranged on the workbench, a lug is arranged in the middle of the fixed die, and a plurality of lower die cavities are symmetrically arranged on two sides of the lug; a movable die is arranged above the fixed die, a groove matched with the boss is arranged in the middle of the movable die, and upper die cavities corresponding to the lower die cavities one by one are symmetrically arranged on two sides of the groove; the workbench is provided with a power mechanism for driving the movable die to lift; the two sides of the fixed die are provided with lower punches corresponding to the lower die cavities one by one, the workbench is provided with a sliding mechanism for driving the lower punches to slide on the workbench, an upper punch corresponding to the upper die cavities one by one is arranged above the movable die, and the movable die is provided with a lifting mechanism for driving the upper punches to lift; the workbench is provided with a water collecting tank which is positioned at two sides of the fixed die.

2. The bent-tube type clamping and pressing pipe forming device according to claim 1, wherein: the power mechanism comprises a fixed plate arranged above the workbench, the fixed plate is connected with the workbench through a supporting plate, third hydraulic cylinders are arranged at two ends of the fixed plate, and telescopic rods of the third hydraulic cylinders are connected with the movable die; sliding sleeves are arranged on the two end faces of the movable mould, and are sleeved on the supporting plate and are in sliding connection with the supporting plate.

3. The bent-tube type clamping and pressing pipe forming device according to claim 2, wherein: the upper die cavity comprises a round hole arranged above the groove and a semicircular arc groove arranged on the side wall of the groove and the bottom surface of the movable die.

4. A bent-tube press-clamping tube forming device as set forth in claim 3, wherein: the sliding mechanism comprises a sliding seat, a first installation seat for installing the lower punch in a plurality of mode is arranged above the sliding seat, a first locking structure for locking the lower punch is arranged on the first installation seat, a sliding block is arranged on the lower surface of the sliding seat, a sliding groove for guiding the sliding of the sliding seat is arranged on a workbench, the sliding block is in sliding connection with the sliding groove, a first hydraulic cylinder is arranged on the workbench, and a telescopic rod of the first hydraulic cylinder is connected with the sliding seat.

5. The bent-tube type clamping and pressing pipe forming device according to claim 4, wherein: the upper part of the positioning groove is provided with a limiting plane matched with the plane of the end head of the lower punch.

6. The bent-tube press-clamping tube forming device according to claim 5, wherein: the first locking structure is arranged on two sides of the first mounting seat and comprises a bolt, a fourth mounting hole for allowing the bolt to be inserted is formed in the first mounting seat, a guide plate with a guiding function on sliding of the bolt is arranged on one section of the bolt inside the fourth mounting hole, a third spring for allowing the bolt to be inserted into insertion holes formed in two sides of the lower punch is arranged between the guide plate and the fourth mounting hole, and a pull ring is arranged on an exposed end of the bolt.

7. The bent-tube type clamping and pressing pipe forming device according to claim 6, wherein: the lifting mechanism comprises a second hydraulic cylinder, the second hydraulic cylinder is arranged on a mounting plate, the mounting plate is connected with the movable mould through a supporting rod, a sliding plate is arranged on a telescopic rod of the second hydraulic cylinder, an upper punch is arranged on the sliding plate through a second mounting seat, a fixing groove for placing the second mounting seat is formed in the sliding plate, and a second locking structure for locking the second mounting seat is arranged on the fixing groove; the slide plate is provided with a guide hole for the support rod to pass through.

8. The bent-tube type clamping and pressing pipe forming device according to claim 7, wherein: the sliding plate is provided with a first mounting groove matched with the shape of a mounting block of the end head of the upper punch, two planes are oppositely arranged on the side face of the circular mounting block to serve as limiting surfaces, the second mounting seat is provided with a first coaxial mounting hole and a second mounting hole, the shape of the first mounting hole is matched with the mounting block, the depth of the first mounting hole is smaller than the height of the mounting block, and the second mounting hole is a round hole.

9. The bent-tube type clamping and pressing pipe forming device according to claim 8, wherein: the second locking structure comprises locking blocks distributed in a circumferential array around a second mounting seat, locking holes corresponding to the locking blocks one by one are formed in the second mounting seat, second mounting grooves for accommodating the locking blocks are formed in the side walls of the fixing grooves, guide blocks are arranged on two sides of the locking blocks, guide grooves matched with the guide blocks are formed in the second mounting grooves, and a first spring for inserting the locking blocks into the locking holes is arranged between the locking blocks and the second mounting grooves; the inside of latch segment is provided with the power hole, and one side that the second mount pad was kept away from to the power hole is the inclined plane of outside slope, is provided with the third mounting hole that makes the push rod pass on the slide, and the one end and the inclined plane contact of power hole of push rod stretch out through the linkage board between the one end of slide to be connected, is provided with the second spring between slide and the linkage board, and the second spring cover is established on the push rod.

10. A method of using the bent-tube type clamping and pressing pipe forming device according to claim 9, comprising the steps of: