Three-way hydraulic machine capable of achieving automatic shearing

Abstract

The utility model discloses a three-way hydraulic machine capable of automatically shearing, which comprises a machine base, a main cylinder arranged above the machine base, a lower die fixedly arranged on the machine base and an upper die driven by the main cylinder, the upper die and the lower die are assembled to form a main pipe forming through cavity, and the upper die is provided with a branch pipe forming hole communicated with the main pipe forming through cavity above the main pipe forming through cavity; the main cylinder comprises a cylinder body and a piston rod, a driving piece is arranged on the piston rod, and the driving piece drives the punch to punch in and out of the branch pipe forming hole along the axis of the branch pipe forming hole. The driving part is arranged on the piston rod of the main cylinder, and after the three-way pipe is formed, the driving part drives the punch to punch into the branch pipe forming hole to automatically cut off a pipe cap of the branch pipe of the three-way pipe; transferring and repeated clamping are not needed during cutting of the pipe cap, and therefore the production efficiency of cutting of the pipe cap of the branch pipe of the three-way pipe can be improved.

Description

Technical Field

[0001] The utility model relates to the technical field of three-way pipe processing equipment, in particular to a three-way hydraulic press capable of automatic shearing. Background Art

[0002] The tee is an extremely important standard pipe fitting in pipeline engineering and design. The forming process of the tee widely adopts the expansion forming process. Expansion forming refers to a forming method that uses a mold, water or oil or other liquids as a force transmission medium, and expands the hollow straight pipe from the inside to the outside along the mold cavity under a frictionless state.

[0003] In the prior art, the tee is first expanded in the mold cavity, and then the caps of the tee branches are cut using a plasma cutting machine after the tee is removed from the mold. On the one hand, workers are required to transfer between different equipment, resulting in waste of transportation and increasing the time of auxiliary processes; on the other hand, since multiple clamping is required on different equipment and molds, the verticality and coaxiality of the main and branch ports of the tee cannot be guaranteed, increasing the workload during shaping; therefore, the cutting of the caps of the tee branches has the problem of low production efficiency. Utility Model Content

[0004] The utility model provides a three-way hydraulic press capable of automatic shearing, so as to solve the technical problems that the existing three-way pipe is subjected to waste of transportation caused by cutting the pipe cap after demoulding and increasing the workload during shaping, thereby reducing the production efficiency.

[0005] In order to achieve the above purpose, the technical solution of the utility model is:

[0006] A three-way hydraulic press capable of automatic shearing comprises: a machine base, a main cylinder arranged above the machine base, a lower die fixed on the machine base and an upper die driven by the main cylinder, the upper die and the lower die are combined to form a main pipe forming cavity, the upper die is provided with a branch pipe forming hole communicating with the main pipe forming cavity above the main pipe forming cavity; the main cylinder comprises a cylinder body and a piston rod, the piston rod is provided with a driving member, the driving member drives a punch to punch into and out of the branch pipe forming hole along the axis of the branch pipe forming hole.

[0007] Furthermore, the driving part includes a blind hole opened on the piston rod and a cylinder cover arranged at the mouth of the blind hole, and the blind hole and the cylinder cover constitute the cylinder body; a piston is arranged in the blind hole, and the piston is fixedly connected to a push rod, which is coaxially arranged with the branch pipe forming hole, and the push rod is fixedly connected to the punch after passing through the cylinder cover.

[0008] Furthermore, the cylinder head is provided with a through hole, which is coaxially arranged with the branch pipe forming hole; the push rod passes through the through hole, and the through hole guides the push rod.

[0009] Furthermore, the punch includes a shearing section, a rounding section and a supporting section which are coaxially and sequentially arranged, the supporting section is fixedly connected to the push rod, the diameter of the shearing section is smaller than the diameter of the supporting section, the outer peripheral surface of the rounding section is a conical surface, the diameter of the rounding section toward the end of the shearing section is smaller than the diameter of the rounding section toward the end of the supporting section, and the diameter of the rounding section facing the end of the supporting section is smaller than the diameter of the support section.

[0010] Furthermore, a first side cylinder and a second side cylinder are arranged relatively horizontally on the machine base, the first side cylinder drives the first mold, and the second side cylinder drives the second mold. The first mold and the second mold respectively block the two ends of the main molding cavity, and the first mold and the second mold are respectively provided with liquid outlets.

[0011] Furthermore, auxiliary cylinders are provided on both sides of the main cylinder, the piston rod and the auxiliary cylinders are fixedly connected with a connecting plate, the upper mold is fixed to the side of the connecting plate away from the main cylinder, and the connecting plate is provided with a clearance hole for the driving member to pass through.

[0012] Furthermore, the end of the piston rod is fixedly connected to the connecting plate via a first flange, and the auxiliary cylinder is fixedly connected to the connecting plate via a second flange.

[0013] Beneficial effects:

[0014] In the present application, a driving member is arranged on the piston rod of the main cylinder. After the three-way pipe is formed, the driving member drives the punch to punch into the branch pipe forming hole and automatically cut off the pipe cap of the three-way pipe branch. The cutting of the pipe cap does not require transportation and multiple clamping, thereby improving the production efficiency of the pipe cap cutting of the three-way pipe branch. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0016] Figure 1 It is a structural schematic diagram of a three-way hydraulic press capable of automatic shearing disclosed in the utility model in a forming state;

[0017] Figure 2 The utility model discloses a structural schematic diagram of a shearing state of a three-way hydraulic press capable of automatic shearing.

[0018] 1. Machine base; 21. Cylinder body; 22. Piston rod; 23. Punch; 231. Shearing section; 232. Rounding section; 233. Support section; 24. Blind hole; 25. Piston; 26. Push rod; 27. Cylinder head; 31. Lower die; 32. Upper die; 4. First side cylinder; 41. First die; 5. Second side cylinder; 51. Second die; 6. Auxiliary cylinder; 7. Connecting plate; 8. First flange; 9. Second flange. DETAILED DESCRIPTION

[0019] In order to make the purpose, technical solution and advantages of the embodiment of the utility model clearer, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all of the embodiments. Based on the embodiment of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0020] A three-way hydraulic press capable of automatic shearing, combined with Figure 1 and Figure 2 As shown, it includes: a machine base 1, a main cylinder arranged above the machine base 1, a lower die 31 fixed on the machine base 1 and an upper die 32 driven by the main cylinder. The upper die 32 and the lower die 31 are combined to form a main pipe forming cavity. The upper die 32 is provided with a branch pipe forming hole communicating with the main pipe forming cavity above the main pipe forming cavity. The main cylinder includes a cylinder body 21 and a piston rod 22. The piston rod 22 is provided with a driving member. The driving member drives the punch 23 to punch into and out of the branch pipe forming hole along the axis of the branch pipe forming hole. A driving member is provided on the piston rod 22 of the main cylinder. After the three-way pipe is formed, the driving member drives the punch 23 to punch into the branch pipe forming hole to automatically cut off the pipe cap of the three-way pipe branch. The cutting of the pipe cap is carried out in the three-way hydraulic press. The three-way pipe does not need to be transported and clamped multiple times before cutting the pipe cap, so the production efficiency of the pipe cap cutting of the three-way pipe branch can be improved.

[0021] Preferably, the driving member includes a blind hole 24 provided on the piston rod 22 and a cylinder cover 27 provided at the mouth of the blind hole 24, and the blind hole 24 and the cylinder cover 27 constitute a cylinder body; a piston 25 is provided in the blind hole 24, and a push rod 26 is fixedly connected to the piston 25. The push rod 26 is coaxially arranged with the branch pipe forming hole, and the push rod 26 is fixedly connected to the punch 23 after passing through the cylinder cover 27, and the push rod 26 drives the punch 23 to punch into the branch pipe forming hole to realize the shearing of the three-way pipe cap.

[0022] Specifically, the piston rod 22 is in contact with the end surface of the cylinder head 27, and the first set of screws passes through the cylinder head 27 and is tightened on the end surface of the piston rod 22 to achieve fixed connection between the piston rod 22 and the cylinder head 27, and a sealing gasket is also provided between the piston rod 22 and the cylinder head 27 for sealing. A first oil circuit and a second oil circuit are provided in the piston rod 22, and the diameter of the end surface of the cylinder head 27 is smaller than the diameter of the end surface of the piston rod 22. One end of the first oil circuit is located on the end surface of the piston rod 22 and on the outside of the cylinder head 27, and the other end is located at the bottom of the blind hole 24. One end of the second oil circuit is also provided on the end surface of the piston rod 22 and on the outside of the cylinder head 27, and the other end is located on the side wall near the mouth of the blind hole 24. The upper surface of the piston 25 and the bottom of the blind hole 24 are used as the process cavity, and the lower surface of the piston 25 and the upper surface of the cylinder head 27 are used as the return cavity; the first oil circuit and the second oil circuit are used to inject oil into the process cavity and the return cavity respectively to realize the movement of the piston 25 driving the push rod 26. The piston 25 is sleeved on the push rod 26 and abuts against the step surface on the push rod 26. The side of the piston 25 away from the step surface is pressed and fixed by a screw ring to achieve a reliable fixed connection between the piston 25 and the push rod 26. The push rod 26 is connected to the punch 23 through a threaded structure, which is convenient for disassembly and maintenance of the punch 23.

[0023] Preferably, the cylinder cover 27 is provided with a through hole, which is coaxially arranged with the branch pipe forming hole; the push rod 26 passes through the through hole, and the aperture of the through hole matches the diameter of the push rod 26, so that the through hole guides the push rod 26 and ensures that the push rod 26 moves along the axial direction of the branch pipe forming hole, thereby ensuring the shape accuracy of the pipe mouth formed by the punch 23 shearing the pipe cap.

[0024] Preferably, the punch 23 includes a shearing section 231, a rounding section 232 and a supporting section 233 which are coaxial and sequentially arranged, and the shearing section 231, the rounding section 232 and the supporting section 233 are integrally formed. The supporting section 233 is fixedly connected to the push rod 26, and the diameter of the shearing section 231 is smaller than the diameter of the supporting section 233, so as to achieve shearing of the tee pipe cap. The outer peripheral surface of the rounding section 232 is a conical surface, and the diameter of the rounding section 232 facing the end of the shearing section 231 is smaller than the diameter of the rounding section 232 facing the end of the supporting section 233. The rounding section 232 shapes the inner circle of the pipe mouth formed after shearing to ensure the size and shape accuracy of the pipe mouth. The diameter of the rounding section 232 facing the end of the supporting section 233 is smaller than the diameter of the supporting section 233, so that a step surface is formed at the end of the supporting section 233, so as to shape the end of the pipe mouth formed after shearing.

[0025] Preferably, the machine base 1 is provided with a first side cylinder 4 and a second side cylinder 5 in a horizontal direction, the first side cylinder 4 drives the first mold 41, the second side cylinder 5 drives the second mold 51, the first mold 41 and the second mold 51 respectively block the two ends of the main pipe forming cavity, and the first mold 41 and the second mold 51 are provided with liquid outlets respectively. After the first mold 41 and the second mold 51 block the two ends of the main pipe forming cavity, liquid is injected and pressurized into the main pipe forming cavity through their respective liquid outlets to realize the molding of the tee pipe branch.

[0026] Preferably, a sub-cylinder 6 is further provided on both sides of the main cylinder, and the piston rod 22 and the sub-cylinder 6 are fixedly connected with a connecting plate 7, so that the forces of the sub-cylinder 6 and the main cylinder act evenly on the connecting plate 7. The upper mold 32 is fixed to the side of the connecting plate 7 away from the main cylinder, and the connecting plate 7 is provided with a clearance hole for the driving member to pass through, that is, the push rod 26 passes through the connecting plate 7, so that the sub-cylinder 6 and the main cylinder jointly drive the upper mold 32 through the connecting plate 7. In addition, the cylinder diameter of the sub-cylinder 6 is smaller than the cylinder diameter of the main cylinder, and the response speed of the sub-cylinder 6 is fast. Using the sub-cylinder 6 to drive the upper mold 32 when opening and closing the mold can increase the speed of movement of the upper mold 32. After closing the mold, the sub-cylinder 6 and the main cylinder are used for pressurization. The cooperation between the sub-cylinder 6 and the main cylinder improves the production efficiency of the three-way hydraulic press.

[0027] Preferably, the end of the piston rod 22 is fixedly connected to the connecting plate 7 through the first flange 8, and the auxiliary cylinder 6 is fixedly connected to the connecting plate 7 through the second flange 9. The first flange 8 is installed at the end of the cylinder cover 27 and is installed at the center of the upper surface of the connecting plate 7 through the second set of screws, and the second flange 9 is installed at the end of the piston rod of the auxiliary cylinder 6 and is installed on the upper surface of the connecting plate 7 through the third set of screws. The auxiliary cylinder 6 and the main cylinder are respectively fixedly connected to the connecting plate 7.

[0028] Working principle of this application device:

[0029] The auxiliary cylinder 6 is started to quickly drive the upper die 32 downward, so that the upper die 32 and the lower die 31 are closed. The main cylinder, the first side cylinder 4 and the second side cylinder 5 are started, and after the first die 41 and the second die 51 block the main pipe forming cavity, the main cylinder pressurizes the upper die 32; the first side cylinder 4 pressurizes the first die 41, and the second side cylinder 5 pressurizes the second die 51. The first die 41 and the second die 51 inject liquid into the main pipe forming cavity through their respective liquid outlets to pressurize, so as to realize the forming of the three-way pipe branch. The piston 25 and the push rod 26 are driven to move synchronously by injecting oil into the process cavity in the blind hole 24, and the push rod 26 drives the punch 23 to rush into the branch pipe forming hole to cut off the pipe cap of the three-way pipe branch. After the shearing is completed, the return cavity in the blind hole 24 is injected with oil, so that the push rod 26 drives the punch 23 to return. The auxiliary cylinder 6, the main cylinder, the first side cylinder 4 and the second side cylinder 5 cooperate to complete the mold opening, and complete the forming of the three-way pipe and the shearing of the pipe cap.

[0030] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the utility model.

Claims

1. A three-way hydraulic press capable of automatic shearing, characterized in that: include: A machine base (1), a main cylinder arranged above the machine base (1), a lower die (31) fixedly arranged on the machine base (1), and an upper die (32) driven by the main cylinder, wherein the upper die (32) and the lower die (31) are combined to form a main pipe forming cavity, and the upper die (32) is provided with a branch pipe forming hole communicating with the main pipe forming cavity above the main pipe forming cavity; the main cylinder comprises a cylinder body (21) and a piston rod (22), and a driving member is provided on the piston rod (22), and the driving member drives a punch (23) to punch into and out of the branch pipe forming hole along the axis of the branch pipe forming hole.

2. A three-way hydraulic press capable of automatic shearing according to claim 1, characterized in that: The driving member comprises a blind hole (24) formed on the piston rod (22) and a cylinder cover (27) provided at the mouth of the blind hole (24), wherein the blind hole (24) and the cylinder cover (27) constitute a cylinder body; a piston (25) is provided in the blind hole (24), and the piston (25) is fixedly connected to a push rod (26), wherein the push rod (26) is coaxially arranged with the branch pipe forming hole, and the push rod (26) passes through the cylinder cover (27) and is fixedly connected to the punch (23).

3. A three-way hydraulic press capable of automatic shearing according to claim 2, characterized in that: The cylinder cover (27) is provided with a through hole, the through hole being coaxially arranged with the branch pipe forming hole; the push rod (26) passes through the through hole, and the through hole guides the push rod (26).

4. A three-way hydraulic press capable of automatic shearing according to claim 2, characterized in that: The punch (23) comprises a shearing section (231), a rounding section (232) and a supporting section (233) which are coaxially and sequentially arranged; the supporting section (233) is fixedly connected to the push rod (26); the diameter of the shearing section (231) is smaller than the diameter of the supporting section (233); the outer peripheral surface of the rounding section (232) is a conical surface; the diameter of the end of the rounding section (232) facing the shearing section (231) is smaller than the diameter of the end of the rounding section (232) facing the supporting section (233); and the diameter of the end of the rounding section (232) facing the supporting section (233) is smaller than the diameter of the supporting section (233).

5. The three-way hydraulic press capable of automatic shearing according to claim 1, characterized in that: A first side cylinder (4) and a second side cylinder (5) are arranged on the machine base (1) in a horizontal direction opposite to each other. The first side cylinder (4) drives the first mold (41), and the second side cylinder (5) drives the second mold (51). The first mold (41) and the second mold (51) respectively block the two ends of the main pipe forming cavity. Liquid outlets are respectively provided on the first mold (41) and the second mold (51).

6. The three-way hydraulic press capable of automatic shearing according to claim 1, characterized in that: Auxiliary cylinders (6) are also provided on both sides of the main cylinder. The piston rod (22) and the auxiliary cylinder (6) are fixedly connected to a connecting plate (7). The upper mold (32) is fixed to a side of the connecting plate (7) away from the main cylinder. The connecting plate (7) is provided with a clearance hole for the driving member to pass through.

7. A three-way hydraulic press capable of automatic shearing according to claim 6, characterized in that: The end of the piston rod (22) is fixedly connected to a connecting plate (7) via a first flange (8), and the auxiliary cylinder (6) is fixedly connected to the connecting plate (7) via a second flange (9).

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