Three-beam four-column hydraulic machine for pipe machining

Abstract

The application relates to the technical field of four-column hydraulic machines, and discloses a three-beam four-column hydraulic machine for pipe machining, which comprises a hydraulic machine, a pipe chuck is fixedly installed on the workbench of the hydraulic machine, a circular pipe is clamped on the inner side of the pipe chuck, a flaring mechanism is fixedly installed at the lower end of the lifting platform of the hydraulic machine, the flaring mechanism comprises a mounting cylinder base fixedly arranged at the lower end of the lifting platform of the hydraulic machine, two groups of protruding blocks are fixedly arranged on the lower side of the mounting cylinder base, a flaring shaft head is arranged in the lower side of the mounting cylinder base, the flaring shaft head is fixedly connected with the two groups of protruding blocks through bolts, an adaptive assembly is arranged on the outer side of the flaring shaft head, and a positioning assembly is arranged on the upper side of the flaring shaft head. The three-beam four-column hydraulic machine for pipe machining can position four groups of flaring cylinders according to requirements, and can satisfy the machining of metal pipes of different specifications.

Description

Technical Field

[0001] This invention relates to the field of four-column hydraulic press technology, and particularly to a three-beam four-column hydraulic press for pipe fitting processing. Background Technology

[0002] Three-beam four-column hydraulic presses are widely used in pipe flaring due to their high rigidity and excellent resistance to eccentric loads. The quality of flaring directly affects the sealing and reliability of pipe fitting connections. However, most flaring nozzles currently used in pipe flaring are of fixed diameter, meaning each pipe fitting specification must be equipped with a corresponding flaring nozzle. When the diameter of the pipe fitting to be processed changes, the operator must stop the machine and manually replace the entire set of flaring nozzles. This replacement process is cumbersome and time-consuming, severely impacting production continuity and equipment utilization. The problem of frequent nozzle replacement is particularly prominent when facing the demand for processing multiple varieties of small batches of pipe fittings, significantly increasing auxiliary time, reducing production efficiency, and causing great inconvenience to actual production. Summary of the Invention

[0003] The main objective of this invention is to provide a three-beam four-column hydraulic press for pipe fitting processing, which can effectively solve the problems in the background art.

[0004] To achieve the above objectives, the technical solution adopted by the present invention is as follows: A three-beam four-column hydraulic press for pipe fitting processing includes a hydraulic press. A pipe fitting chuck is fixedly installed on the worktable of the hydraulic press. A circular pipe fitting is clamped inside the pipe fitting chuck. A flaring mechanism is fixedly installed at the lower end of the lifting platform of the hydraulic press. The flaring mechanism includes a mounting cylinder fixedly installed at the lower end of the lifting platform of the hydraulic press. Two sets of protrusions are fixedly installed on the lower side of the mounting cylinder. A flaring shaft head is provided inside the lower side of the mounting cylinder. The flaring shaft head is fixedly connected to the two sets of protrusions by bolts. An adapter component is provided on the outer side of the flaring shaft head. A positioning component is provided on the upper side of the flaring shaft head. A return spring is fixedly installed between the adapter component and the upper inner wall of the mounting cylinder. The adapter assembly includes four sets of flared cylinders that are fitted around the outside of the flared shaft head. The lower end of each of the four sets of flared cylinders is provided with an inner inclined surface. Each of the four sets of flared cylinders has a movable opening in the middle position and a circular opening in the center position. The inner wall of each circular opening is provided with an inclined surface.

[0005] Preferably, the inner side of the flared shaft head includes a movably disposed lifting sleeve, the outer side of the lifting sleeve is fixedly disposed with a limiting ring, the inner side of the flared shaft head is provided with a movable cavity corresponding to the position of the limiting ring, a pre-tightening spring is fixedly disposed between the limiting ring and the upper inner wall of the movable cavity, a connecting pipe is fixedly disposed inside the flared shaft head at the lower end of the limiting ring on the outer side of the lifting sleeve, the lower side of the lifting sleeve is provided with a threaded part, the lower end of the threaded part is provided with a deep hexagonal groove, and an unlocking rod is movably disposed inside the lifting sleeve.

[0006] Preferably, the positioning component includes a housing fixedly mounted on the upper end of the lifting sleeve. The inner side of the housing has several sets of sliding grooves and an arc-shaped groove. Positioning blocks are slidably mounted on the inner side of each of the sets of sliding grooves. Arc-shaped grooves are also mounted on the positioning blocks. Spring pieces are fitted inside the arc-shaped grooves and the arc-shaped grooves on the positioning blocks. A connecting block is fixedly mounted at one end of each of the positioning blocks corresponding to its center. A guide opening is provided on the inner side of each of the connecting blocks. A connecting frame is fixedly mounted on the upper side of the unlocking rod corresponding to the positions of the guide openings.

[0007] Preferably, the flared shaft head is assembled from multiple pieces, each set of flared cylinders is stacked together with the same thickness, the movable opening is adapted to the protrusion, and the circular opening is adapted to the positioning component.

[0008] Preferably, the lifting sleeve passes through the flared shaft head and the inside of the connecting pipe, and the limiting ring is adapted to the movable cavity.

[0009] Preferably, the threaded part is threadedly connected to the connecting pipe, the unlocking rod passes through the inside of the lifting sleeve to the positioning assembly, and a partial position on the lower side of the unlocking rod is set in a deep hexagonal groove.

[0010] Preferably, the several sets of the sliding grooves and positioning blocks are arranged in a ring evenly, and the outer side of the positioning blocks is inclined.

[0011] Preferably, the spring-loaded positioning block is located in the slide groove, the guide opening is inclined, and each set of connecting frames is movably positioned in the corresponding guide opening.

[0012] Compared with the prior art, the present invention has the following beneficial effects: 1. By inserting a hexagonal tool into the deep hexagonal groove, the threaded lifting sleeve is rotated to move up or down. When moving upward, the limiting ring will squeeze the pre-tightening spring inside the movable cavity. The elastic pressure of the pre-tightening spring provides stability to the connection between the threaded part and the connecting pipe. At the same time, it pushes the positioning component to move upward, controlling the positioning component to be stuck at the upper end of the required set of flared cylinders. This restricts the upward movement of the flared cylinders after positioning, thereby increasing the diameter of the flared shaft head. The four sets of flared cylinders can be positioned according to requirements to meet the processing needs of metal pipe fittings of different specifications.

[0013] 2. During the upward movement, after the positioning block contacts the inclined surface of the flared cylinder, the pressure applied by the return spring will push the positioning block to move inward along the outer shell, stretching the connecting spring. After reaching the upper end of the flared cylinder, it will automatically pop out to position the flared cylinder and switch the diameter of the flared shaft head, thus fulfilling the positioning purpose. While rotating the lifting sleeve downward, the tool needs to push the unlocking rod upward. The unlocking rod will drive several sets of connecting frames to move upward. With the guidance of the guide port in the connecting block, the connecting block and the positioning component will be pulled to move inward along the slide groove, realizing the purpose of retracting several sets of positioning blocks at the same time, so that the lifting sleeve can drive the outer shell back to the initial position.

[0014] 3. The flaring process is achieved by adding a flaring cylinder to the end of the circular pipe fitting. The inner inclined surface of each group provides a progressive flaring guide, effectively preventing edge chipping or scratching caused by excessive instantaneous force on the pipe end when the circular pipe fitting is in contact with the flaring cylinder. The inward inclination makes the contact between the flaring cylinder and the inner wall of the circular pipe fitting more gentle, reducing jamming caused by hard extrusion. The movable port and inclined surface allow the flaring cylinder, which is not positioned by the positioning component, to remain vertically moving up and down. After contacting the circular pipe fitting, it is pushed without affecting the flaring process. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of a three-beam four-column hydraulic press for pipe fitting processing according to the present invention; Figure 2 This is a partial structural schematic diagram of a three-beam four-column hydraulic press for pipe fitting processing according to the present invention; Figure 3 This is a schematic diagram of the internal structure of the flaring mechanism of a three-beam four-column hydraulic press for pipe fitting processing according to the present invention; Figure 4 This invention relates to a three-beam four-column hydraulic press for pipe fitting processing. Figure 3 A magnified structural diagram of part A; Figure 5 This is a schematic diagram of the adapter component structure for a three-beam four-column hydraulic press for pipe fitting processing according to the present invention; Figure 6This is a schematic diagram of the inner structure of the flared end and adapter assembly of a three-beam four-column hydraulic press for pipe processing according to the present invention. Figure 7 This is a schematic diagram of the flaring section structure of a three-beam four-column hydraulic press for pipe fitting processing according to the present invention; Figure 8 This is a schematic diagram of the positioning component structure of a three-beam four-column hydraulic press for pipe fitting processing according to the present invention; Figure 9 This is a schematic diagram of the internal unfolded structure of the positioning component of a three-beam four-column hydraulic press for pipe processing according to the present invention.

[0016] In the diagram: 1. Hydraulic press; 2. Pipe fitting chuck; 3. Circular pipe fitting; 4. Flaring mechanism; 41. Mounting cylinder seat; 42. Flaring shaft head; 421. Lifting sleeve; 422. Limiting ring; 423. Movable cavity; 424. Preload spring; 425. Connecting pipe; 426. Threaded part; 427. Deep hexagonal groove; 428. Unlocking rod; 43. Adaptor component; 431. Flaring cylinder; 432. Inner inclined surface; 433. Movable opening; 434. Circular opening; 435. Inclined surface; 44. Positioning component; 441. Outer shell; 442. Slide groove opening; 443. Arc groove one; 444. Positioning block; 445. Arc groove two; 446. Spring; 447. Connecting block; 448. Guide opening; 449. Connecting frame; 45. Return spring; 46. Protrusion. Detailed Implementation

[0017] The technical solutions of the present invention will be clearly and completely described below with reference to the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0018] In the description of this invention, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship as a relative relationship of orientation or position, and are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention.

[0019] Please see Figures 1-9An embodiment of the present invention provides a three-beam four-column hydraulic press for pipe fitting processing, comprising a hydraulic press 1, a pipe fitting chuck 2 fixedly installed on the worktable of the hydraulic press 1, a circular pipe fitting 3 clamped inside the pipe fitting chuck 2, a flaring mechanism 4 fixedly installed at the lower end of the lifting platform of the hydraulic press 1, the flaring mechanism 4 including a mounting cylinder seat 41 fixedly installed at the lower end of the lifting platform of the hydraulic press 1, two sets of protrusions 46 fixedly installed on the lower side of the mounting cylinder seat 41, a flaring shaft head 42 provided inside the lower side of the mounting cylinder seat 41, the flaring shaft head 42 being fixedly connected to the two sets of protrusions 46 by bolts, an adapter component 43 provided on the outer side of the flaring shaft head 42, a positioning component 44 provided on the upper side of the flaring shaft head 42, and a return spring 45 fixedly installed between the adapter component 43 and the upper inner wall of the mounting cylinder seat 41; The adapter component 43 includes four sets of flared cylinders 431 that are sleeved on the outside of the flared shaft head 42. The lower end of each of the four sets of flared cylinders 431 is provided with an inner inclined surface 432. Each of the four sets of flared cylinders 431 has a movable opening 433 in the middle position. Each of the four sets of flared cylinders 431 has a circular opening 434 in the center position. The inner wall of each circular opening 434 is provided with an inclined surface 435.

[0020] The flared shaft head 42 is assembled from multiple pieces. Each set of flared cylinders 431 is stacked together with the same thickness. The movable opening 433 is adapted to the protrusion 46, and the circular opening 434 is adapted to the positioning component 44.

[0021] Furthermore, the flaring operation is achieved by adding a flaring cylinder 431 to the port of the circular tube 3. The setting of each set of inner inclined surfaces 432 provides a progressive flaring guide, effectively preventing edge chipping or scratching caused by excessive instantaneous force on the tube opening when the circular tube 3 contacts the flaring point. The inward inclination makes the contact between the flaring cylinder 431 and the inner wall of the circular tube 3 more gentle, reducing jamming caused by hard extrusion. The setting of the movable port 433 and the inclined surface 435 allows the flaring cylinder 431, which is not positioned by the positioning component 44, to remain vertically moving up and down. After contacting the circular tube 3, it is pushed without affecting the flaring operation.

[0022] The inner side of the flared shaft head 42 includes a movably mounted lifting sleeve 421. A limiting ring 422 is fixedly mounted on the outer side of the lifting sleeve 421. A movable cavity 423 is opened on the inner side of the flared shaft head 42 corresponding to the position of the limiting ring 422. A pre-tightening spring 424 is fixedly mounted between the limiting ring 422 and the upper inner wall of the movable cavity 423. A connecting pipe 425 is fixedly mounted inside the flared shaft head 42 at the lower end of the limiting ring 422 on the outer side of the lifting sleeve 421. A threaded part 426 is provided on the lower side of the lifting sleeve 421. A deep hexagonal groove 427 is opened at the lower end of the threaded part 426. An unlocking rod 428 is movably mounted on the inner side of the lifting sleeve 421.

[0023] The lifting sleeve 421 passes through the inside of the flared shaft head 42 and the connecting tube 425. The limiting ring 422 is adapted to the movable cavity 423. The threaded part 426 is threadedly connected to the connecting tube 425. The unlocking rod 428 passes through the inside of the lifting sleeve 421 to the positioning component 44. The lower part of the unlocking rod 428 is located in the deep hexagonal groove 427.

[0024] Furthermore, by inserting a hexagonal tool into the interior of the deep hexagonal groove 427 (without pressing the unlocking rod 428), the threaded lifting sleeve 421 is rotated to move upward or downward. When moving upward, the limiting ring 422 will press the pre-tightening spring 424 inside the movable cavity 423. The elastic pressure of the pre-tightening spring 424 provides stability for the connection between the threaded part 426 and the connecting pipe 425, while pushing the positioning component 44 to move upward. The positioning component 44 is controlled to be stuck on the upper end of the required set of flared cylinders 431, restricting the upward movement of the flared cylinders 431 after positioning, thereby increasing the diameter of the flared shaft head 42. The four sets of flared cylinders 431 can be positioned according to requirements to meet the processing of metal pipes of different specifications.

[0025] The positioning component 44 includes a housing 441 fixedly mounted on the upper end of the lifting sleeve 421. The inner side of the housing 441 has several sets of sliding grooves 442 and an arc-shaped groove 443. Positioning blocks 444 are slidably mounted on the inner side of each set of sliding grooves 442. Arc-shaped grooves 445 are provided on each set of positioning blocks 444. Spring pieces 446 are fitted inside the arc-shaped grooves 443 and the arc-shaped grooves 445 on the positioning blocks 444. A connecting block 447 is fixedly mounted on one end of each set of positioning blocks 444 corresponding to the center. A guide opening 448 is provided on the inner side of each set of connecting blocks 447. A connecting bracket 449 is fixedly mounted on the upper side of the unlocking rod 428 corresponding to the positions of the guide openings 448.

[0026] Several sets of sliding grooves 442 and positioning blocks 444 are arranged in a ring evenly. The outer side of the positioning block 444 is inclined. The spring piece 446 restricts the positioning block 444 in the sliding groove 442. The guide opening 448 is inclined. Each set of connecting brackets 449 is movably set in the corresponding guide opening 448.

[0027] Furthermore, during the upward movement, after the positioning block 444 contacts the inclined surface 435 of the flared cylinder 431, the pressure applied by the return spring 45 will push the positioning block 444 to move inward along the outer shell 441, stretching the connected spring piece 446 until the upper end of the flared cylinder 431, after which it will automatically pop out to position the flared cylinder 431 and switch the diameter of the flared shaft head 42, thus simultaneously satisfying the positioning purpose. While rotating the lifting sleeve 421 to move downward, the tool needs to push the unlocking rod 428 upward, and the unlocking rod 428 will drive the connected sets of connecting brackets 449 to move upward. With the guidance of the guide port 448 in the connecting block 447, the connecting block 447 and the positioning component 44 are pulled to move along the slide groove 442 towards the inside of the outer shell 441, so that the positioning blocks 444 can retract simultaneously, allowing the lifting sleeve 421 to drive the outer shell 441 back to its initial position.

[0028] In this embodiment: During use, a hexagonal tool is inserted into the interior of the deep hexagonal groove 427 (without pressing the unlocking rod 428), and the threaded lifting sleeve 421 is rotated to move upward or downward. When moving upward, the limiting ring 422 will press the pre-tightening spring 424 inside the movable cavity 423. The elastic pressure of the pre-tightening spring 424 provides stability for the connection between the threaded part 426 and the connecting pipe 425, and at the same time pushes the positioning component 44 to move upward. The positioning component 44 is controlled to be stuck on the upper end of the required set of flared cylinders 431, restricting the upward movement of the flared cylinders 431 after positioning, thereby increasing the diameter of the flared shaft head 42. The four sets of flared cylinders 431 can be positioned according to requirements to meet the processing of metal pipes of different specifications.

[0029] In addition, during the upward movement, after the positioning block 444 contacts the inclined surface 435 of the flared cylinder 431, the pressure applied by the return spring 45 will push the positioning block 444 to move inward along the outer shell 441, stretching the connected spring piece 446 until the upper end of the flared cylinder 431, and then automatically pop out to position the flared cylinder 431. After switching the diameter of the flared shaft head 42, the positioning purpose is simultaneously satisfied. While rotating the lifting sleeve 421 to move downward, the tool needs to push the unlocking rod 428 upward, and the unlocking rod 428 will drive the connected sets of connecting brackets 449 to move upward. With the guidance of the guide port 448 in the connecting block 447, the connecting block 447 and the positioning component 44 are pulled to move along the slide groove 442 towards the inside of the outer shell 441, so that the positioning blocks 444 can retract simultaneously, allowing the lifting sleeve 421 to drive the outer shell 441 back to the initial position.

[0030] Subsequently, the flaring operation is achieved by adding a flaring cylinder 431 to the port of the circular pipe fitting 3. The setting of each set of inner inclined surfaces 432 provides a progressive flaring guide, effectively preventing edge chipping or scratching caused by excessive instantaneous force on the pipe opening when the circular pipe fitting 3 comes into contact with the flaring. The inward inclination makes the contact between the flaring cylinder 431 and the inner wall of the circular pipe fitting 3 more gentle, reducing jamming caused by hard extrusion. The setting of the movable port 433 and the inclined surface 435 allows the flaring cylinder 431, which is not positioned by the positioning component 44, to remain vertically moving up and down. After contacting the circular pipe fitting 3, it is pushed without affecting the flaring operation.

[0031] The control and connection methods of the electronic equipment and hydraulic press structure in this invention are common knowledge in the field. Their working principles are well-known technologies, and the appropriate model is selected according to actual use. They will not be elaborated further here.

[0032] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A three-beam four-column hydraulic press for pipe fitting processing, comprising a hydraulic press (1), characterized in that: A pipe fitting chuck (2) is fixedly installed on the worktable of the hydraulic press (1). A circular pipe fitting (3) is clamped inside the pipe fitting chuck (2). A flaring mechanism (4) is fixedly installed at the lower end of the lifting platform of the hydraulic press (1). The flaring mechanism (4) includes a mounting cylinder seat (41) fixedly installed at the lower end of the lifting platform of the hydraulic press (1). Two sets of protrusions (46) are fixedly installed on the lower side of the mounting cylinder seat (41). A flaring shaft head (42) is installed inside the lower side of the mounting cylinder seat (41). The flaring shaft head (42) is fixedly connected to the two sets of protrusions (46) by bolts. An adapter component (43) is installed on the outer side of the flaring shaft head (42). A positioning component (44) is installed on the upper side of the flaring shaft head (42). A return spring (45) is fixedly installed between the adapter component (43) and the upper inner wall of the mounting cylinder seat (41). The adapter component (43) includes four sets of flared cylinders (431) sleeved on the outside of the flared shaft head (42). The lower end of each of the four sets of flared cylinders (431) is provided with an inner inclined surface (432). Each of the four sets of flared cylinders (431) has a movable opening (433) in the middle position. Each of the four sets of flared cylinders (431) has a circular opening (434) in the center position. The inner wall of each circular opening (434) is provided with an inclined surface (435).

2. The three-beam four-column hydraulic press for pipe fitting processing according to claim 1, characterized in that: The inner side of the flared shaft head (42) includes a movably disposed lifting sleeve (421). A limiting ring (422) is fixedly disposed on the outer side of the lifting sleeve (421). A movable cavity (423) is opened on the inner side of the flared shaft head (42) corresponding to the position of the limiting ring (422). A pre-tightening spring (424) is fixedly disposed between the limiting ring (422) and the upper inner wall of the movable cavity (423). A connecting pipe (425) is fixedly disposed inside the flared shaft head (42) at the lower end of the limiting ring (422) outside the lifting sleeve (421). A threaded part (426) is provided on the lower side of the lifting sleeve (421). A deep hexagonal groove (427) is opened at the lower end of the threaded part (426). An unlocking rod (428) is movably disposed on the inner side of the lifting sleeve (421).

3. A three-beam four-column hydraulic press for pipe fitting processing according to claim 2, characterized in that: The positioning component (44) includes a housing (441) fixedly mounted on the upper end of the lifting sleeve (421). The housing (441) has several sets of sliding grooves (442) on its inner side. The housing (441) has an arc groove (443) on its inner side. Positioning blocks (444) are slidably mounted on the inner side of each of the several sets of sliding grooves (442). Arc grooves (445) are mounted on each of the several sets of positioning blocks (444). Spring pieces (446) are fitted inside the arc grooves (443) and the arc grooves (445) on the several sets of positioning blocks (444). A connecting block (447) is fixedly mounted on one end of each of the several sets of positioning blocks (444) corresponding to the center. A guide opening (448) is opened on the inner side of each of the several sets of connecting blocks (447). A connecting frame (449) is fixedly mounted on the upper side of the unlocking rod (428) corresponding to the positions of the several sets of guide openings (448).

4. A three-beam four-column hydraulic press for pipe fitting processing according to claim 1, characterized in that: The flared shaft head (42) is assembled from splices. Each set of flared cylinders (431) is stacked together with the same thickness. The movable opening (433) is adapted to the protrusion (46), and the circular opening (434) is adapted to the positioning component (44).

5. A three-beam four-column hydraulic press for pipe fitting processing according to claim 2, characterized in that: The lifting sleeve (421) passes through the flared shaft head (42) and the inside of the connecting pipe (425), and the limiting ring (422) is adapted to the movable cavity (423).

6. A three-beam four-column hydraulic press for pipe fitting processing according to claim 2, characterized in that: The threaded part (426) is threadedly connected to the connecting pipe (425). The unlocking rod (428) passes through the inside of the lifting sleeve (421) to the positioning assembly (44). The lower part of the unlocking rod (428) is located in the deep hexagonal groove (427).

7. A three-beam four-column hydraulic press for pipe fitting processing according to claim 3, characterized in that: The several sets of the sliding grooves (442) and positioning blocks (444) are arranged in a ring evenly, and the outer side of the positioning blocks (444) is inclined.

8. A three-beam four-column hydraulic press for pipe fitting processing according to claim 3, characterized in that: The spring piece (446) restricts the positioning block (444) in the slide groove (442), the guide port (448) is inclined, and each set of connecting brackets (449) is movably set in the corresponding guide port (448).

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