CN117463866B - Forming equipment for carbon steel clamping straight pipe joint - Google Patents
Forming equipment for carbon steel clamping straight pipe joint Download PDFInfo
- Publication number
- CN117463866B CN117463866B CN202311803674.0A CN202311803674A CN117463866B CN 117463866 B CN117463866 B CN 117463866B CN 202311803674 A CN202311803674 A CN 202311803674A CN 117463866 B CN117463866 B CN 117463866B
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- groove
- punch
- mounting
- forming
- liquid inlet
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- 229910000975 Carbon steel Inorganic materials 0.000 title claims abstract description 23
- 239000010962 carbon steel Substances 0.000 title claims abstract description 23
- 239000007788 liquid Substances 0.000 claims abstract description 61
- 238000003825 pressing Methods 0.000 claims abstract description 31
- 238000007789 sealing Methods 0.000 claims abstract description 29
- 238000000465 moulding Methods 0.000 claims description 37
- 230000005540 biological transmission Effects 0.000 claims description 8
- 230000007246 mechanism Effects 0.000 claims description 8
- 238000000034 method Methods 0.000 claims description 4
- 238000007493 shaping process Methods 0.000 claims 1
- 238000010030 laminating Methods 0.000 abstract description 2
- 238000004519 manufacturing process Methods 0.000 abstract description 2
- 230000000694 effects Effects 0.000 description 8
- 238000010586 diagram Methods 0.000 description 5
- 238000003780 insertion Methods 0.000 description 5
- 230000037431 insertion Effects 0.000 description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 5
- 230000009471 action Effects 0.000 description 4
- 238000009434 installation Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 230000008093 supporting effect Effects 0.000 description 3
- 238000005452 bending Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 230000008092 positive effect Effects 0.000 description 1
- 238000005381 potential energy Methods 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D26/00—Shaping without cutting otherwise than using rigid devices or tools or yieldable or resilient pads, i.e. applying fluid pressure or magnetic forces
- B21D26/02—Shaping without cutting otherwise than using rigid devices or tools or yieldable or resilient pads, i.e. applying fluid pressure or magnetic forces by applying fluid pressure
- B21D26/033—Deforming tubular bodies
- B21D26/045—Closing or sealing means
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D37/00—Tools as parts of machines covered by this subclass
- B21D37/04—Movable or exchangeable mountings for tools
Abstract
The invention discloses a carbon steel clamping and pressing type straight pipe joint forming device, and belongs to the technical field of pipe body production. The lower die and the upper die of the carbon steel clamping straight pipe joint forming equipment are respectively provided with a first forming groove and a second forming groove for forming a sealing ring groove, the side wall of the punch is provided with a plurality of liquid inlet branch pipes which are distributed in a radial manner on the punch, the liquid outlet ends of the liquid inlet branch pipes are opposite to the first forming grooves, the liquid inlet ends of the liquid inlet branch pipes are communicated with a liquid inlet channel in the center of the punch, and the liquid inlet branch pipes are provided with electromagnetic valves; the outside cover of drift is equipped with the outer tube, and the outer tube laminating is on the surface of drift, forms the draw-in groove that is used for the card to establish the pipe between outer tube one end and the surface of drift, is connected through quick lock structure between sleeve pipe and the drift. The carbon steel clamping and pressing type straight pipe joint forming equipment can solve the problem of poor uniformity of double sealing ring grooves at the end of the clamping and pressing pipe.
Description
Technical Field
The invention relates to the technical field of pipe body production, in particular to a carbon steel clamping and pressing type straight pipe joint forming device.
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 forming of the clamping and pressing pipe is carried out in a water expansion forming mode at present, the water expansion forming process is few, and the forming quality is good. The sealing ring groove at the end of the clamping and pressing pipe is also prepared at the same time of water expansion molding.
The existing sealing ring groove for the end of the straight pipe of the clamping and pressing pipe seals the forming cavity by using a punch, then the pipe fitting is preformed by using a medium-pressure medium, and then the pipe fitting is subjected to high-pressure forming by using a high-pressure medium, so that the side wall of the pipe fitting is clung to the forming groove of the die, and further the forming of the sealing ring groove for the end of the clamping and pressing pipe is realized. The forming of a single sealing ring groove of the clamping and pressing pipe is easy to realize, but in order to improve the sealing effect of the existing clamping and pressing pipe, two sealing ring grooves are often required to be arranged at the end head of the clamping and pressing pipe. When the existing water expansion forming equipment forms the sealing ring grooves, the pipe blank wall is attached to the surface of the die by utilizing a high-pressure medium, but when the two sealing ring grooves are formed by using the high-pressure medium, the two sealing ring grooves deform simultaneously under the action of the high-pressure medium, so that the pipe blank cannot be fed for the two sealing ring grooves well, the uniformity of the forming of the sealing ring grooves is poor, and the sealing effect of the clamping and pressing pipe is affected.
Disclosure of Invention
The invention aims to provide a carbon steel clamping and pressing type straight pipe joint forming device, which solves the problem of poor uniformity of double sealing ring grooves at the end of a clamping and pressing pipe.
In order to achieve the above purpose, the invention provides a carbon steel clamping and pressing type straight pipe joint forming device, which comprises a base, wherein a first fixing seat is arranged above the base, a fixed lower die is arranged on the first fixing seat, a movable upper die is arranged above the lower die, punches for forming are arranged on two sides of the lower die, the punches are arranged on a sliding seat, and a hydraulic cylinder for driving the sliding seat to slide on the base is arranged on the base; the lower die and the upper die are respectively provided with a first molding groove and a second molding groove for molding the sealing ring groove, the side wall of the punch is provided with a plurality of liquid inlet branch pipes, the liquid inlet branch pipes are radially distributed on the punch, the liquid outlet ends of the liquid inlet branch pipes are opposite to the first molding grooves, the liquid inlet ends of the liquid inlet branch pipes are communicated with a liquid inlet channel in the center of the punch, and the liquid inlet branch pipes are provided with electromagnetic valves; the outside cover of drift is equipped with the outer tube, and the outer tube laminating is on the surface of drift, forms the draw-in groove that is used for the card to establish the pipe between outer tube one end and the surface of drift, is connected through quick lock structure between sleeve pipe and the drift.
Preferably, the distance between the connecting section between the first forming groove and the second forming groove and the side surface of the punch is larger than the wall thickness of the clamping and pressing pipe.
Preferably, the liquid inlet branch pipe comprises a first conical pipe and a second conical pipe, the first conical pipe and the second conical pipe are connected through a connecting part, the connecting part is of a circular hole structure with equal diameter, and one ends of the first conical pipe and the second conical pipe, which are smaller in hole diameter, are connected with the connecting part.
Preferably, the liquid outlet end of the second conical tube is provided with an annular groove, the liquid outlet end of the second conical tube is communicated through the annular groove, and the width of the annular groove is not larger than that of the first forming groove.
Preferably, one end of the punch is of a double-step structure, a clamping groove is formed between a first step of the punch and the outer sleeve, an arc-shaped inclined surface is arranged at one end of the outer sleeve inserted into the cavity, the arc-shaped inclined surface and the second forming groove are spliced to form a complete sealing ring groove forming groove, and the outer sleeve with the Z-shaped cross section is abutted against the second step of the punch.
Preferably, the quick locking structure comprises a locking block, a first mounting groove for accommodating the locking block is formed in the punch, the locking block is in sliding connection with the first mounting groove, a locking hole for enabling the top end of the locking block to penetrate through is formed in the outer sleeve, and a first spring is arranged between the bottom end of the locking block and the first mounting groove; the top of the locking block is provided with an inward inclined plane which is convenient for the outer sleeve to pass through.
Preferably, the bottom of latch segment is provided with the limiting plate, and the upper portion of first mounting groove is provided with spacing hole, and spacing hole and first mounting groove intercommunication, the width of spacing hole are less than the width of limiting plate, and on the upper portion of first mounting groove and the second step of spacing hole all extended to the drift, the one end that the spacing hole is close to the drift second step is provided with the baffle.
Preferably, the end head of the punch is provided with a mounting block, the mounting block is provided with opposite limiting planes, the mounting seat is provided with a mounting hole matched with the mounting block, the mounting hole is provided with a through hole for the punch to pass through, and the mounting seat is provided with a locking structure for locking the mounting block; the mounting seat is arranged on the sliding seat, and the sliding seat is provided with a lifting mechanism for driving the mounting seat to slide up and down; a push plate is arranged on a piston rod of the hydraulic cylinder, the push plate is connected with the sliding seat through a connecting rod, the connecting rod is uniformly distributed outside the punch, and the piston rod of the hydraulic cylinder is positioned in the center of the push plate.
Preferably, the locking structure comprises a pin, a second mounting groove for accommodating the pin is arranged on the mounting seat, the pin is in sliding connection with the second mounting groove, and a second spring for inserting the pin into a pin hole arranged on the mounting block is arranged between the pin and the second mounting groove; the middle part of round pin post is provided with the jack that runs through the round pin post, is provided with the through-hole that makes the one end of guide arm insert the jack on the mount pad, guide arm and through-hole sliding connection, the end of guide arm and the inclined plane contact of jack, the one end that the guide arm stretched out the jack is connected through the connecting plate, is provided with the third spring between connecting plate and the mount pad, and the third spring cover is established on the guide arm, and the outside at the drift is established to the gliding cover of connecting plate.
Preferably, the lifting mechanism comprises a screw rod, the screw rod is positioned in a sliding groove arranged in the middle of the sliding seat, the top end of the screw rod is connected with a motor arranged at the top of the sliding seat, a transmission nut is arranged outside the screw rod and meshed with the screw rod, the transmission nut is fixedly connected with the mounting seat through a connecting column, a fixed plate is fixedly arranged in the sliding groove, a guide hole for the connecting column to pass through is arranged on the fixed plate, and the connecting column is in sliding connection with the guide hole; guide grooves are formed in two sides of the sliding groove, and guide blocks matched with the guide grooves are arranged on the mounting seat.
The carbon steel clamping and pressing type straight pipe joint forming equipment has the advantages and positive effects that:
1. the end of the punch is provided with the liquid inlet branch pipe, the liquid inlet branch pipe is opposite to the first forming groove, and the first forming groove is firstly filled by the liquid inlet branch pipe, so that the forming effect of the clamping and pressing pipe double-sealing ring groove is improved.
2. The liquid inlet branch pipe is arranged into the form of a first conical pipe and a second conical pipe, the first conical pipe is connected with the second conical pipe through a cylindrical connecting part, the liquid inlet branch pipe accelerates a high-pressure medium, the filling effect in the first forming groove is guaranteed, the first forming groove is guaranteed to be filled at first, and the forming effect of the double sealing ring groove is improved.
3. The outside of drift sets up the outer tube, adopts the structure of components of a whole that can function independently between outer tube and the drift, can solitary outer tube and drift change, is favorable to practicing thrift the cost. The cross section of the outer sleeve is of a Z-shaped structure, the bending part of the outer sleeve is abutted against the step surface of the punch, and the supporting strength of the punch on the outer sleeve is improved.
4. The outer sleeve is connected with the punch through the locking block, the locking block is connected with the first mounting groove of the punch through the first spring, the top end of the locking block is set to be an inclined plane, the outer sleeve is convenient to mount on the punch, and the convenience of mounting and dismounting of the outer sleeve is improved.
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 an embodiment of a device for forming a straight pipe joint by clamping and pressing carbon steel;
FIG. 2 is a schematic diagram of a punch forming structure of an embodiment of a device for forming a straight pipe joint by clamping and pressing carbon steel;
FIG. 3 is an enlarged view of A in FIG. 2;
FIG. 4 is a schematic view of a liquid inlet branch pipe structure of an embodiment of a carbon steel clamping straight pipe joint forming device;
FIG. 5 is a schematic diagram of a side view of a punch of an embodiment of a device for forming a straight tube joint of carbon steel clamping type;
FIG. 6 is an enlarged view of B in FIG. 5;
FIG. 7 is a schematic diagram of a punch mounting structure of an embodiment of a carbon steel clamping straight pipe joint forming device according to the present invention;
FIG. 8 is a schematic diagram of a punch locking structure of an embodiment of a carbon steel clamping straight pipe joint forming device according to the present invention;
fig. 9 is a schematic structural view of a lifting mechanism of an embodiment of a carbon steel clamping straight pipe joint forming device.
Reference numerals
1. A base; 2. a first fixing seat; 3. a lower die; 4. an upper die; 5. a first molding groove; 6. a second molding groove; 7. a punch; 8. an outer sleeve; 9. an annular groove; 10. a mounting block; 11. a mounting base; 12. a slide; 13. a sliding groove; 14. a liquid inlet; 15. a push plate; 16. a connecting rod; 17. a hydraulic cylinder; 18. the second fixing seat; 19. a guide rail; 20. a liquid inlet channel; 21. a liquid inlet branch pipe; 22. a clamping groove; 23. a first mounting groove; 24. a locking block; 25. a limiting plate; 26. a first spring; 27. a locking hole; 28. a baffle; 29. a limiting hole; 30. a first conical tube; 31. a connection part; 32. a second tapered tube; 33. a pin hole; 34. a second mounting groove; 35. a second spring; 36. a jack; 37. a guide rod; 38. a third spring; 39. a connecting plate; 40. a mounting hole; 41. a limit plane; 42. a pin; 43. a connecting column; 44. a motor; 45. a screw rod; 46. a drive nut; 47. and a fixing plate.
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 fig. 1-9, the carbon steel clamping and pressing type straight pipe joint forming equipment comprises a base 1, a first fixing seat 2 is fixedly arranged above the base 1, a fixed lower die 3 is arranged on the first fixing seat 2, and the lower die 3 is fixed on the first fixing seat 2 through bolts. The upper die 4 is arranged above the lower die 3, and the upper die 4 is lifted in the vertical direction by the existing lifting device. The lifting device can be a screw rod 45 nut pair, an electric cylinder, an air cylinder or a hydraulic device and the like. The punch 7 for forming is provided on both sides of the lower die 3, and the punch 7 is provided on the slide 12. The base 1 is provided with a hydraulic cylinder 17 which drives the slide seat 12 to slide on the base 1. The hydraulic cylinder 17 drives the punch 7 to stretch and retract in the forming cavity through the stretch and retraction of the piston rod, so that the tube blank is formed.
The two ends of the molding cavity of the lower die 3 are provided with a semicircular first molding groove 5 and a semicircular second molding groove 6 for molding the sealing ring groove, the two ends of the molding cavity of the upper die 4 are provided with a corresponding semicircular first molding groove 5 and a corresponding semicircular second molding groove 6, and the upper die 4 and the lower die 3 are assembled to form the whole circular first molding groove 5 and the whole circular second molding groove 6. The tube blank is respectively provided with two sealing ring grooves for clamping and pressing the tube in the first forming groove 5 and the second forming groove 6. The first molding groove 5 is located inside the second molding groove 6. The distance between the connecting section between the first forming groove 5 and the second forming groove 6 and the side surface of the punch 7 is larger than the wall thickness of the clamping pipe, so that a high-pressure medium can enter the second forming groove 6 through the connecting section to form the second forming groove 6.
The side wall of the punch 7 is provided with a plurality of liquid inlet branch pipes 21, and the liquid inlet branch pipes 21 are distributed on the punch 7 in a radial mode. The liquid outlet end of the liquid inlet branch pipe 21 is opposite to the first forming groove 5, and the liquid inlet end of the liquid inlet branch pipe 21 is communicated with the liquid inlet channel 20 in the center of the punch 7. The punch heads 7 on two sides of the lower die 3 are provided with liquid inlet channels 20, and the liquid inlet channels 20 are connected with an external high-pressure generating device through liquid inlet openings 14 arranged at the tail ends of the punch heads 7 and used for injecting high-pressure media for molding into the die cavity. The liquid inlet branch pipe 21 is provided with an electromagnetic valve, the electromagnetic valve is connected with an external controller through the prior art, and the electromagnetic valve is used for controlling the opening and closing of the liquid inlet branch pipe 21.
The liquid inlet branch pipe 21 comprises a first conical pipe 30 and a second conical pipe 32, and the first conical pipe 30 is connected with the second conical pipe 32 through a connecting part 31. The connecting portion 31 has a circular hole structure with equal diameter, and one ends of the first tapered tube 30 and the second tapered tube 32 with smaller hole diameters are connected to the connecting portion 31. When the high-pressure medium enters the forming cavity through the liquid inlet channel 20, the high-pressure medium also enters the first conical tube 30, and the high-pressure medium is compressed and accelerated in the first conical tube 30 because the tube diameter of the first conical tube 30 gradually decreases from the liquid inlet channel 20 to the connecting part 31, the flow rate of the liquid is related to the cross-sectional area, and the smaller the cross-sectional area is, the larger the flow rate is. The accelerated high-pressure medium enters the connecting portion 31 and then enters the second taper pipe 32 through the connecting portion 31. The pipe diameter of the second conical pipe 32 gradually increases from the connecting part 31 to the first forming groove 5, compressed high-pressure medium enters the second conical pipe 32, compressed potential energy is released, the high-pressure medium is continuously accelerated in the second conical pipe 32, and finally, the high-pressure medium is sprayed out from the liquid outlet end of the second conical pipe 32 for forming the first forming groove 5. The high-pressure medium is accelerated twice in the liquid inlet branch pipe 21, and the high-pressure medium has higher speed, so that the high-pressure medium firstly fills the first forming groove 5 and then fills the second forming groove 6, the first forming groove 5 and the second forming groove 6 can be fully filled, and the forming effect of the two sealing ring grooves at the end of the clamping pipe is improved.
The liquid outlet end of the second conical tube 32 is provided with an annular groove 9, the liquid outlet end of the second conical tube 32 is communicated through the annular groove 9, and the width of the annular groove 9 is not larger than that of the first forming groove 5. The annular groove 9 connects the high-pressure medium sprayed out through the second conical tube 32, the high-pressure medium is filled in the whole annular groove 9, and the first forming groove 5 is formed through the annular groove 9, so that the uniformity of forming of the first forming groove 5 is improved.
The outer sleeve 8 is sleeved outside the punch 7, and the outer sleeve 8 is attached to the outer surface of the punch 7. The sleeve and the punch 7 are connected through a quick locking structure, and a split structure is adopted between the sleeve and the punch 7, so that the sleeve and the punch 7 can be replaced independently. One end of the punch 7 is of a double-step structure, a clamping groove 22 is formed between the first step of the punch 7 and the outer sleeve 8, one end of the tube blank is clamped in the clamping groove 22 and used for positioning the tube blank, and the tube blank is pushed to move towards the inner direction of the forming cavity through the clamping groove 22. One end of the outer sleeve 8 inserted into the cavity is provided with an arc inclined plane, the arc inclined plane is matched with the second molding groove 6, and the arc inclined plane is used as a part of molding surface of the clamping and pressing pipe sealing ring groove. The arc inclined plane is spliced with the second molding groove 6 to form a complete molding groove of the sealing ring groove. And the arc inclined plane is also convenient for forming the tube blank, the tube blank is in smooth transition, the stress concentration generated in the tube blank forming process is reduced, and the tube clamping and pressing forming quality is improved.
The cross section of the outer sleeve 8 is of a Z-shaped structure, and one end of the outer sleeve 8 with a larger opening is sleeved outside the tube blank and connected through a quick locking structure. The reducing part of the outer sleeve 8 is abutted with the second step of the punch 7, the outer sleeve 8 is supported by the second step of the punch 7, the pushing effect of the punch 7 on the outer sleeve 8 is improved, the supporting effect of the punch 7 on the outer sleeve 8 is also improved, and the collapse of the outer sleeve 8 caused by larger impact force in the forming process is reduced.
The quick locking structure comprises a locking block 24, a first mounting groove 23 for accommodating the locking block 24 is formed in the punch 7, and the locking block 24 is connected with the first mounting groove 23 in an up-down sliding mode. The outer sleeve 8 is provided with a locking hole 27 for allowing the top end of the locking block 24 to pass through, and the length of the locking hole 27 is slightly longer than that of the locking block 24, so that the locking block 24 can be just inserted into the locking hole 27. A first spring 26 is arranged between the bottom end of the locking block 24 and the first mounting groove 23, and two ends of the first spring 26 are fixedly connected with the bottom end of the locking block 24 and the bottom of the first mounting groove 23 respectively. The first spring 26 applies an outward elastic force to the locking piece 24 so that the locking piece 24 is inserted into the locking hole 27. The top end of the locking block 24 is provided with an inwardly inclined slope for the passage of the outer sleeve 8. The outer sleeve 8 pushes the locking block 24 to move downward along the first mounting groove 23 by the inclined surface of the locking block 24, thereby facilitating the sleeve 8 to be sleeved outside the punch 7.
The bottom of the locking block 24 is provided with a limiting plate 25, and the limiting plate 25 and the locking block 24 are of an integrated structure. The upper portion of the first mounting groove 23 is provided with a limiting hole 29, and the limiting hole 29 communicates with the first mounting groove 23. The width of the limiting hole 29 is smaller than that of the limiting plate 25, and the width of the limiting hole 29 is slightly larger than that of the locking block 24, so that the locking block 24 can be inserted into the limiting hole 29, and the limiting plate 25 is located at the lower part of the limiting hole 29. This prevents the lock piece 24 from being ejected from the first mounting groove 23 by the first spring 26. The upper part of the first mounting groove 23 and the limit hole 29 extend to the second step of the punch 7, the height of the upper part of the first mounting groove 23 on the second step is slightly larger than that of the limit plate 25, the locking block 24 is convenient to mount on the second step of the punch 7, and the locking block 24 is inserted into the first mounting groove 23 through the limit hole 29 and the upper part of the first mounting groove 23. One end of the limiting hole 29, which is close to the second step of the punch 7, is provided with a baffle 28, and the baffle 28 is arranged after the locking block 24 is installed in place. The baffle 28 blocks the locking block 24, so that the punch 7 can drive the outer sleeve 8 to be pulled out stably outwards through the locking block 24.
The forming end of the punch 7 is provided with a conical surface, and the diameter of the smaller end of the conical surface is smaller than the inner diameter of the tube blank, so that the punch 7 can be conveniently inserted into the tube blank. The diameter of the larger end of the conical surface is slightly larger than the inner diameter of the tube blank, so that the cylindrical surface at the front end of the punch 7 is used for carrying out preliminary expanding on the tube blank, and the tightness between the punch 7 and the tube blank is ensured. After the primary molding is carried out on the tube blank, the inner diameter of the tube blank is increased, and a gap is formed between the tube blank and the outer surface of the punch 7, so that the molding medium acts on the inner wall of the tube blank, and the final molding is carried out on the clamping and pressing tube.
The end of the punch 7 is provided with a mounting block 10, and the mounting block 10 is fixed on the punch 7. The mounting block 10 is provided to facilitate mounting of the punch 7. The mounting block 10 is provided with two opposite limiting planes 41, and the mounting seat 11 is provided with a mounting hole 40 which is matched with the shape of the mounting block 10. The mounting hole 40 is provided with a through hole through which the punch 7 passes. The punch 7 is inserted into the through hole of the mounting seat 11, the mounting block 10 is inserted into the mounting hole 40, and the mounting block 10 and the mounting hole 40 are limited and positioned through the limiting plane 41, so that the punch 7 is convenient to mount.
The mounting seat 11 is provided with a locking structure for locking the mounting block 10. The locking structure comprises a pin 42, and the mounting seat 11 is provided with second mounting grooves 34 for accommodating the pin 42, and the second mounting grooves 34 are positioned on two sides of the mounting block 10. The pin 42 is slidably coupled to the second mounting slot 34. The mounting block 10 is provided with pin holes 33, and the pin holes 33 are in one-to-one correspondence with the pins 42. One end of the pin 42 is inserted into the pin hole 33 to realize locking connection between the mounting block 10 and the mounting seat 11. A second spring 35 is arranged between the pin 42 and the second mounting groove 34, two ends of the second spring 35 are respectively and fixedly connected with the end head of the pin 42 and the bottom of the second mounting groove 34, and the pin 42 is inserted into the pin hole 33 under the action of the second spring 35.
The middle part of the pin 42 is provided with a jack 36 penetrating through the pin 42, one side of the jack 36 away from the mounting block 10 is an inclined plane, and one side of the jack 36 close to the mounting seat 11 is a plane. The mounting seat 11 is provided with a through hole for inserting one end of the guide rod 37 into the insertion hole 36, and the guide rod 37 is slidably connected with the through hole. The guide 37 is inserted from the larger open end of the insertion hole 36, and the tip of the guide 37 is in contact with the inclined surface of the insertion hole 36. In order to facilitate the relative sliding between the guide bar 37 and the inclined surface of the insertion hole 36, one end of the guide bar 37 contacting the inclined surface is provided in a rounded structure. One end of the guide rod 37 extending out of the jack 36 is connected through a connecting plate 39, and the guide rod 37 is fixedly connected with the connecting plate 39. A third spring 38 is arranged between the connecting plate 39 and the mounting seat 11, and two ends of the third spring 38 are respectively fixed on the connecting plate 39 and the mounting seat 11. The third spring 38 is sleeved on the guide rod 37. The connecting plate 39 is slidably fitted over the outside of the punch 7.
When the punch 7 is installed, the connecting plate 39 is pushed towards the direction of the installation seat 11, the connecting plate 39 drives the guide rod 37 to synchronously move, the third spring 38 is compressed, the end head of the guide rod 37 pushes the pin 42 to move away from the installation block 10 through the inclined surface of the insertion hole 36, the second spring 35 is compressed, and the pin 42 slides into the second installation groove 34. The punch 7 is inserted into the through hole of the mount 11, and the mount block 10 is inserted into the mount hole 40 to position the punch 7. The connecting plate 39 is loosened, the connecting plate 39 rebounds under the action of the third spring 38, the connecting plate 39 drives the guide rod 37 to be pulled out outwards, and the pin column 42 is inserted into the pin hole 33 under the action of the second spring 35, so that the punch 7 is installed. The punch 7 is very convenient to mount and dismount, and the punch 7 is convenient to replace.
The mount pad 11 sets up on slide 12, and the middle part of slide 12 is provided with vertical sliding tray 13, and mount pad 11 is located sliding tray 13 and with sliding tray 13 sliding connection. A push plate 15 is fixedly arranged on a piston rod of the hydraulic cylinder 17, and the piston rod of the hydraulic cylinder 17 is positioned in the center of the push plate 15. The push plate 15 is connected with the slide seat 12 through a plurality of connecting rods 16, and the connecting rods 16 are uniformly distributed outside the punch 7. The connecting rod 16 is arranged in parallel, and two ends of the connecting rod 16 are fixedly connected with the push plate 15 and the sliding seat 12 respectively. The hydraulic cylinder 17 is connected to an external hydraulic station. The hydraulic cylinder 17 is fixed on the second fixing base 18, and the second fixing base 18 is fixedly arranged on the base 1. The telescopic rod of the hydraulic cylinder 17 is connected with the sliding seat 12 through the push plate 15 and the connecting rod 16, so that the stability of connection with the sliding seat 12 is improved, the pushing force is provided for the sliding seat 12 from the middle part of the sliding seat 12 and distributed around the punch 7, and the stability of pushing the punch 7 by the sliding seat 12 is improved.
The base 1 is provided with a guide rail 19, and the guide rail 19 is positioned at two sides of the bottom of the sliding seat 12. The bottom of the slide seat 12 is provided with a groove matched with the guide rail 19, and the groove is sleeved outside the guide rail 19 and is in sliding connection with the guide rail 19. The guide rail 19 has guiding and supporting functions for the sliding of the slider 12.
The slide seat 12 is provided with a lifting mechanism for driving the mounting seat 11 to slide up and down. The lifting mechanism comprises a screw rod 45, and the screw rod 45 is positioned in a sliding groove 13 arranged in the middle of the sliding seat 12. The top of the slide seat 12 is provided with a hole for the screw rod 45 to pass through, and the screw rod 45 is rotationally connected with the slide seat 12 through a bearing. The top end of the screw 45 is connected with a motor 44 fixedly arranged at the top of the slide seat 12. The sliding groove 13 is fixedly provided with a fixed plate 47, and the bottom end of the screw rod 45 is rotatably connected with the fixed plate 47 through a bearing. The outside of the screw 45 is provided with a transmission nut 46, and the transmission nut 46 is meshed with the screw 45. The transmission nut 46 is fixedly connected with the mounting seat 11 through a plurality of connecting columns 43, and two ends of the connecting columns 43 are respectively fixedly connected with the transmission nut 46 and the mounting seat 11. The fixing plate 47 is provided with a guide hole through which the connection post 43 passes, and the connection post 43 is slidably connected to the guide hole. The guide holes have a guiding effect on the connection posts 43. Guide grooves are formed in two sides of the sliding groove 13, and guide blocks matched with the guide grooves are arranged on the mounting seat 11. The guide block is positioned in the guide groove and is in sliding connection with the guide groove, so that the stability of the mounting seat 11 in vertical sliding is improved. The height of the mounting seat 11 can be adjusted through the lifting mechanism, so that the punches 7 with different diameters can be aligned with the forming cavity well, and the adaptability is improved.
When in use, firstly, the pipe blank is placed in the forming cavity of the lower die 3, the upper die 4 moves downwards, and the upper die 4 and the lower die 3 are assembled and combined together. The hydraulic cylinder 17 is started, and the hydraulic cylinder 17 drives the punch 7 to move into the cavity. Firstly, a medium-pressure medium is used for filling the forming cavity, and the medium-pressure medium is used for expanding the inner diameter of the tube blank, so that the inner diameter of the tube blank is attached to the cavity wall of the forming cavity. Then, a high-pressure medium is adopted for molding, meanwhile, the hydraulic cylinder 17 drives the punch 7 to continuously move towards the molding cavity synchronously, the electromagnetic valve on the liquid inlet branch pipe 21 is opened, after the high-pressure medium is accelerated by the liquid inlet branch pipe 21, the high-pressure medium acts in the first molding groove 5 to mold the first molding groove 5 first, and then the electromagnetic valve on the liquid inlet branch pipe 21 is closed. The high-pressure medium in the molding cavity enters the second molding groove 6 through a gap between the punch 7 and the inner wall of the tube blank, and molds the second molding groove 6. After the forming is completed, the hydraulic cylinder 17 drives the punch 7 to move out of the forming cavity, the upper die 4 moves upwards, and the formed clamping and pressing pipe is taken out of the lower die 3.
Therefore, the carbon steel clamping and pressing type straight pipe joint forming equipment can solve the problem of poor uniformity of double sealing ring grooves at the end of the clamping and pressing pipe.
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 (5)
1. The utility model provides a carbon steel clamping pressure formula straight tube joint former, includes the base, is provided with first fixing base above the base, is provided with fixed lower mould on the first fixing base, and the top of lower mould is provided with the last mould of removal, and the both sides of lower mould are provided with the drift that is used for the shaping, and the drift setting is on the slide, is provided with the pneumatic cylinder that drives the slide and slide on the base; the method is characterized in that: the lower die and the upper die are respectively provided with a first molding groove and a second molding groove for molding the sealing ring groove, the side wall of the punch is provided with a plurality of liquid inlet branch pipes, the liquid inlet branch pipes are radially distributed on the punch, the liquid outlet ends of the liquid inlet branch pipes are opposite to the first molding grooves, the liquid inlet ends of the liquid inlet branch pipes are communicated with a liquid inlet channel in the center of the punch, and the liquid inlet branch pipes are provided with electromagnetic valves; the outer part of the punch is sleeved with an outer sleeve, the outer sleeve is attached to the outer surface of the punch, a clamping groove for clamping a tube blank is formed between one end of the outer sleeve and the outer surface of the punch, and the outer sleeve is connected with the punch through a quick locking structure;
the liquid inlet branch pipe comprises a first conical pipe and a second conical pipe, the first conical pipe and the second conical pipe are connected through a connecting part, the connecting part is of a circular hole structure with equal diameter, and one ends of the first conical pipe and the second conical pipe, which are smaller in hole diameter, are connected with the connecting part;
the liquid outlet end of the second conical tube is provided with an annular groove, the liquid outlet end of the second conical tube is communicated through the annular groove, and the width of the annular groove is not larger than that of the first forming groove;
one end of the punch is of a double-step structure, a clamping groove is formed between the first step of the punch and the outer sleeve, an arc-shaped inclined surface is arranged at one end of the outer sleeve inserted into the cavity, the arc-shaped inclined surface and the second forming groove are spliced to form a complete sealing ring groove forming groove, and the outer sleeve with the Z-shaped cross section is abutted against the second step of the punch;
the quick locking structure comprises a locking block, a first mounting groove for accommodating the locking block is formed in the punch, the locking block is in sliding connection with the first mounting groove, a locking hole for enabling the top end of the locking block to pass through is formed in the outer sleeve, and a first spring is arranged between the bottom end of the locking block and the first mounting groove; the top end of the locking block is provided with an inward inclined plane which is convenient for the outer sleeve to pass through;
the bottom of latch segment is provided with the limiting plate, and the upper portion of first mounting groove is provided with spacing hole, and spacing hole and first mounting groove intercommunication, the width of spacing hole is less than the width of limiting plate, and on the upper portion of first mounting groove and spacing hole all extended the second step of drift, the one end that the spacing hole is close to the second step of drift was provided with the baffle.
2. The apparatus for forming a straight tube joint of carbon steel clamping pressure type according to claim 1, wherein: the distance between the connecting section between the first forming groove and the second forming groove and the side face of the punch is larger than the wall thickness of the clamping and pressing pipe.
3. The apparatus for forming a straight tube joint of carbon steel clamping pressure type according to claim 2, wherein: the end head of the punch is provided with a mounting block, the mounting block is provided with opposite limiting planes, the mounting seat is provided with a mounting hole matched with the mounting block, the mounting hole is provided with a through hole for the punch to pass through, and the mounting seat is provided with a locking structure for locking the mounting block; the mounting seat is arranged on the sliding seat, and the sliding seat is provided with a lifting mechanism for driving the mounting seat to slide up and down; a push plate is arranged on a piston rod of the hydraulic cylinder, the push plate is connected with the sliding seat through a connecting rod, the connecting rod is uniformly distributed outside the punch, and the piston rod of the hydraulic cylinder is positioned in the center of the push plate.
4. A carbon steel clamping straight pipe joint forming device according to claim 3, wherein: the locking structure comprises a pin, a second mounting groove for accommodating the pin is formed in the mounting seat, the pin is in sliding connection with the second mounting groove, and a second spring for inserting the pin into a pin hole formed in the mounting block is arranged between the pin and the second mounting groove; the middle part of round pin post is provided with the jack that runs through the round pin post, is provided with the through-hole that makes the one end of guide arm insert the jack on the mount pad, guide arm and through-hole sliding connection, the end of guide arm and the inclined plane contact of jack, the one end that the guide arm stretched out the jack is connected through the connecting plate, is provided with the third spring between connecting plate and the mount pad, and the third spring cover is established on the guide arm, and the outside at the drift is established to the gliding cover of connecting plate.
5. The apparatus for forming a straight tube joint of carbon steel clamping pressure type according to claim 4, wherein: the lifting mechanism comprises a screw rod, the screw rod is positioned in a sliding groove arranged in the middle of the sliding seat, the top end of the screw rod is connected with a motor arranged at the top of the sliding seat, a transmission nut is arranged outside the screw rod and meshed with the screw rod, the transmission nut is fixedly connected with the mounting seat through a connecting column, a fixed plate is fixedly arranged in the sliding groove, a guide hole for the connecting column to pass through is arranged on the fixed plate, and the connecting column is in sliding connection with the guide hole; guide grooves are formed in two sides of the sliding groove, and guide blocks matched with the guide grooves are arranged on the mounting seat.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311803674.0A CN117463866B (en) | 2023-12-26 | 2023-12-26 | Forming equipment for carbon steel clamping straight pipe joint |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202311803674.0A CN117463866B (en) | 2023-12-26 | 2023-12-26 | Forming equipment for carbon steel clamping straight pipe joint |
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| CN117463866A CN117463866A (en) | 2024-01-30 |
| CN117463866B true CN117463866B (en) | 2024-03-19 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP2001212627A (en) * | 2000-01-31 | 2001-08-07 | Opton Co Ltd | Bulge forming machine |
| KR20050011284A (en) * | 2003-07-22 | 2005-01-29 | 주식회사 성우하이텍 | A actual punch for hydro-forming system |
| CN110548799A (en) * | 2019-09-10 | 2019-12-10 | 山东金润德新材料科技股份有限公司 | ultrahigh-pressure water expansion and vacuum auxiliary forming device and method for clamp-press type pipe fitting |
| CN216027473U (en) * | 2021-07-26 | 2022-03-15 | 佛山市永恒液压机械有限公司 | Combined type double-clamping pressure pipe punch |
| CN115716101A (en) * | 2022-09-22 | 2023-02-28 | 宁波铭扬不锈钢管业有限公司 | Double-seal multi-clamping-pressure metal pipeline connecting piece mold and production process of pipeline connecting piece |
| CN116809754A (en) * | 2023-07-10 | 2023-09-29 | 河北龙锦管道装备有限公司 | Bent pipe type clamping and pressing pipe forming device and application method thereof |
-
2023
- 2023-12-26 CN CN202311803674.0A patent/CN117463866B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001212627A (en) * | 2000-01-31 | 2001-08-07 | Opton Co Ltd | Bulge forming machine |
| KR20050011284A (en) * | 2003-07-22 | 2005-01-29 | 주식회사 성우하이텍 | A actual punch for hydro-forming system |
| CN110548799A (en) * | 2019-09-10 | 2019-12-10 | 山东金润德新材料科技股份有限公司 | ultrahigh-pressure water expansion and vacuum auxiliary forming device and method for clamp-press type pipe fitting |
| CN216027473U (en) * | 2021-07-26 | 2022-03-15 | 佛山市永恒液压机械有限公司 | Combined type double-clamping pressure pipe punch |
| CN115716101A (en) * | 2022-09-22 | 2023-02-28 | 宁波铭扬不锈钢管业有限公司 | Double-seal multi-clamping-pressure metal pipeline connecting piece mold and production process of pipeline connecting piece |
| CN116809754A (en) * | 2023-07-10 | 2023-09-29 | 河北龙锦管道装备有限公司 | Bent pipe type clamping and pressing pipe forming device and application method thereof |
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| CN117463866A (en) | 2024-01-30 |
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