An extrusion assembly to prevent damage during hydraulic tubing extrusion molding

Abstract

An extrusion assembly for preventing damage in hydraulic tubing extrusion forming, comprising: a fixing frame; an auxiliary pushing frame is slidably installed on the fixing frame, and at least one auxiliary pushing hydraulic cylinder is fixedly installed on the fixing frame, and the output end of each auxiliary pushing hydraulic cylinder is fixedly connected with the auxiliary pushing frame; a main pushing cylinder is fixedly installed on the auxiliary pushing frame, the output end of the main pushing cylinder is fixedly installed with a pressing piece, and the pressing piece is slidably connected with the auxiliary pushing frame; two groups of auxiliary assemblies are slidably installed on the auxiliary pushing frame, and the two groups of auxiliary assemblies are respectively located at both ends of the pressing piece and the included angle between the two groups of auxiliary assemblies and the pressing piece is less than 90°; through the cooperation between the auxiliary assembly and the pressing piece, the tubing is gradually pressed downward in an arc shape in the tubing bending process, damage to the tubing is avoided in the extrusion process, and the influence on the inner wall diameter of the tubing is reduced.

Description

Technical Field

[0001] This invention relates to the field of hydraulic hose bending technology, and more particularly to an extrusion assembly that prevents damage during hydraulic hose extrusion molding. Background Technology

[0002] During the laying of oil pipelines, it is often necessary to bend the pipelines when a bend is required; the existing bending methods are all achieved by stamping.

[0003] For example, Chinese invention patent CN114101443A discloses a double-sided anti-bulging oil pipe stamping device; it includes an oil pipe fitting and a stamping device disposed on the outside of the oil pipe fitting for stamping. The stamping device includes an external mechanism and a stamping mechanism. The external mechanism includes an outer frame and a force-bearing support member. By using a two-stage stamping method, the stamping range of the stamping head is increased, thereby increasing the deformation distance formed by stamping the oil pipe. The main purpose of the first-stage stamping is to reduce the height of the stamping head, and the main purpose of the second-stage stamping is to stamp the oil pipe. At the same time, during the first-stage stamping process, the side pressure spring generates elastic force acting on the side pressure frame, which in turn acts on the oil pipe fitting. In this way, the two sides of the oil pipe can be pressed and limited without fixing both ends of the oil pipe, preventing the phenomenon of bulging.

[0004] However, this method, because it uses a single stamping head to directly press downwards during the stamping process, can easily damage the oil pipes.

[0005] Therefore, this invention proposes an extrusion assembly and extrusion process to prevent damage during hydraulic tubing extrusion molding. This assembly can bend the tubing into an arc shape during extrusion bending, thereby avoiding damage to the tubing during the extrusion process and reducing the impact on the inner diameter of the tubing. Summary of the Invention

[0006] The technical solution used in this invention is: an extrusion assembly for preventing damage during hydraulic hose extrusion molding, comprising: a fixed frame; an auxiliary push frame is slidably mounted on the fixed frame, and at least one auxiliary push hydraulic cylinder is fixedly mounted thereon, the output end of each of the auxiliary push hydraulic cylinders being fixedly connected to the auxiliary push frame;

[0007] A main push cylinder is fixedly installed on the auxiliary push frame, and a pressure member is fixedly installed at the output end of the main push cylinder. The pressure member is slidably connected to the auxiliary push frame. Two sets of auxiliary components are slidably installed on the auxiliary push frame. The two sets of auxiliary components are respectively located at both ends of the pressure member, and the included angle between them and the pressure member is less than 90°.

[0008] Two lower pressure frames are rotatably mounted on the auxiliary push frame; each lower pressure frame is connected to the fixed frame through a corresponding compression elastic component; one end of each compression elastic component is rotatably mounted on the fixed frame, and the other end is rotatably and slidably connected to the corresponding lower pressure frame.

[0009] The fixing frame is provided with a clearance for bending the pipe, and the clearance is located directly below the pressure member.

[0010] Furthermore, the auxiliary component includes: an auxiliary pressurizing element and an auxiliary pressure head; both the auxiliary pressurizing element and the auxiliary pressure head are slidably mounted on the auxiliary push frame; the auxiliary pressurizing element and the auxiliary pressure head are elastically connected by a second compression elastic element; the auxiliary push frame is provided with a protrusion for restricting the auxiliary pressure head from moving out of the auxiliary push frame;

[0011] The pressurizing component is provided with a second protrusion for pressing each of the auxiliary pressurizing components; a main pressure head is fixedly installed at the lower end of the pressurizing component.

[0012] Furthermore, a rotating wheel is rotatably mounted on the auxiliary pressurizing component; the rotating wheel is located between the auxiliary pressurizing component and the pressurizing component.

[0013] Furthermore, the fixed frame is provided with two sets of pulleys, located on the two sides of the fixed frame respectively; each set of pulleys includes at least two pulleys, and each pulley is rotatably mounted on the fixed frame;

[0014] Each of the aforementioned pressure frames is rotatably mounted with a No. 2 pulley.

[0015] Furthermore, a connecting plate is fixedly installed on the auxiliary push frame, and two pulley pressure members are slidably installed at both ends of the connecting plate. Each of the two pulley pressure members is elastically connected to the connecting plate through a compression spring; each of the two pulley pressure members is used to press down the corresponding two pulley.

[0016] Furthermore, each of the lower pressure frames is also elastically connected to the auxiliary push frame via a torsion spring; each torsion spring provides a downward force to the corresponding lower pressure frame.

[0017] Furthermore, each end of the fixed frame is connected to a pressing plate via at least two pressing hydraulic cylinders; each pressing hydraulic cylinder is rotatably mounted on the fixed frame, and its output end is rotatably connected to the corresponding pressing plate.

[0018] Furthermore, each of the extrusion plates is provided with a set of clamping mechanisms, the clamping mechanisms including two sets of opposing pushing groups;

[0019] Each of the pushing groups includes: a pushing cylinder and a clamping plate; at least one pushing cylinder is provided and is fixedly mounted on the extrusion plate; the clamping plate is slidably mounted on the extrusion plate and is fixedly connected to the output end of each corresponding pushing cylinder.

[0020] Furthermore, a connecting female block is fixedly installed at the output end of each of the extrusion hydraulic cylinders, and a connecting male block that mates with each of the connecting female blocks is fixedly installed on the extrusion plate; each of the connecting female blocks is rotatably connected to the corresponding connecting male block through a corresponding insert rod.

[0021] Both the female and male connecting blocks have through holes, and the insertion rod passes through each through hole on the corresponding female and male connecting blocks.

[0022] An extrusion process for preventing damage during hydraulic hose extrusion molding includes the following steps:

[0023] S1. Pull out any one of the plugs, place the hydraulic hose into the fixed frame, and place it on the pulley;

[0024] S2. Start each extrusion hydraulic cylinder;

[0025] S3. Start the auxiliary hydraulic cylinder and the main cylinder.

[0026] Since the present invention adopts the above-mentioned technical solution, the beneficial effects of the present invention are as follows: the present invention, through the cooperation between the auxiliary components and the pressure component, makes the oil pipe gradually pressed down in an arc shape during the bending process, avoiding damage to the oil pipe during the extrusion process, and reducing the impact on the inner diameter of the oil pipe. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the overall structure of the present invention.

[0028] Figure 2 For the present invention Figure 1 Enlarged schematic diagram of the structure at point a.

[0029] Figure 3 This is a front view of the overall structure of the present invention.

[0030] Figure 4 This is a schematic diagram showing the connection relationship between the auxiliary pusher and the main pusher cylinder of the present invention.

[0031] Figure 5 This is a cross-sectional view showing the connection relationship between the auxiliary push frame and the auxiliary components of the present invention.

[0032] Figure 6 This is a schematic diagram showing the positional relationship between the pressure component and the rotating wheel in this invention.

[0033] Reference numerals: Fixed frame-1; Pulley-2; Auxiliary push frame-3; Auxiliary push hydraulic cylinder-4; Main push cylinder-5; Pressing component-6; Compression elastic component-7; Connecting plate-8; Second pulley pressing component-9; Lower press frame-10; Extrusion hydraulic cylinder-11; Connecting block-12; Extrusion plate-13; Insert rod-14; Clamping plate-15; Push cylinder-16; Connecting block-17; Auxiliary press component-31; Rotary wheel-32; Auxiliary pressure head-33; Second compression elastic component-34; Second pulley-61; Main pressure head-63; Clearance-A; Protrusion-B; Second protrusion-C; Pulley block-D. Detailed Implementation

[0034] Examples, such as Figure 1-6 As shown, an extrusion assembly for preventing damage during hydraulic hose extrusion molding includes: a fixed frame 1; an auxiliary push frame 3 is slidably mounted on the fixed frame 1, and four auxiliary push hydraulic cylinders 4 are fixedly mounted and evenly distributed around the fixed frame 1; the output end of each auxiliary push hydraulic cylinder 4 is fixedly connected to the auxiliary push frame 3.

[0035] A main push cylinder 5 is fixedly installed on the auxiliary push frame 3. A pressure component 6 is fixedly installed at the output end of the main push cylinder 5. The pressure component 6 is slidably connected to the auxiliary push frame 3. Two sets of auxiliary components are slidably installed on the auxiliary push frame 3. The two sets of auxiliary components are located at both ends of the pressure component 6, and the included angle between them and the pressure component 6 is less than 90°. The main push cylinder 5 is a hydraulic cylinder.

[0036] Two lower pressure frames 10 are rotatably mounted on the auxiliary push frame 3; each lower pressure frame 10 is connected to the fixed frame 1 through a corresponding compression elastic component 7; one end of each compression elastic component 7 is rotatably mounted on the fixed frame 1, and the other end is rotatably and slidably connected to the corresponding lower pressure frame 10.

[0037] The fixed frame 1 is provided with a clearance A for bending the pipe, and the clearance A is located directly below the pressure member 6. When the oil pipe is squeezed and bent, the oil pipe is placed into the fixed frame 1, and then four auxiliary push hydraulic cylinders 4 are activated at the same time, so that the two sets of auxiliary components on the auxiliary push frame 3 press down the oil pipe. During the pressing process, the pressing frame 10 also presses down the oil pipe from top to bottom to prevent the two ends of the oil pipe from tilting upwards when the oil pipe is squeezed and bent.

[0038] Two sets of auxiliary components push the hydraulic cylinder 4 down a certain distance to press the oil pipe. Then, the main push cylinder 5 is activated to drive the pressure component 6 to move downward. The pressure component 6 squeezes the oil pipe. During the squeezing process of the pressure component 6, the two sets of auxiliary components hold the oil pipe in place to prevent it from moving inward due to the force during the downward squeezing process of the pressure component 6. This ensures that the oil pipe is arc-shaped at the squeezing point, rather than "V"-shaped.

[0039] Specifically, the auxiliary components include: an auxiliary pressurizing component 31 and an auxiliary pressure head 33; both the auxiliary pressurizing component 31 and the auxiliary pressure head 33 are slidably mounted on the auxiliary push frame 3; the auxiliary pressurizing component 31 and the auxiliary pressure head 33 are elastically connected by a second compression elastic component 34; the auxiliary push frame 3 is provided with a protrusion B for limiting the movement of the auxiliary pressure head 33 out of the auxiliary push frame 3;

[0040] The pressure member 6 is provided with a second protrusion C for squeezing each auxiliary pressure member 31; a main pressure head 63 is fixedly installed at the lower end of the pressure member 6; when the pressure member 6 squeezes the oil pipe downward, the protrusion on the pressure member 6 squeezes the auxiliary member 31, causing the auxiliary member 31 to move downward, and squeezes the auxiliary pressure head 33 through the second compression elastic member 34, so that when the pressure member 6 squeezes the oil pipe downward, the auxiliary pressure head 33 applies more force to the oil pipe, thus preventing the oil pipe from bending closer and closer to a "V" shape as the pressure member 6 is pressed down.

[0041] Specifically, in order to reduce the friction between the auxiliary pressure head 33 and the pressure member 6, a rotating wheel 32 is rotatably mounted on the auxiliary pressure member 31; the rotating wheel 32 is located between the auxiliary pressure member 31 and the pressure member 6.

[0042] Specifically, in order to allow the oil pipe to enter the fixed frame 1 better, the fixed frame 1 is provided with two sets of pulley groups D, which are located on the two sides of the fixed frame 1 respectively; each set of pulley groups D includes: at least two pulleys 2, and each pulley 2 is rotatably mounted on the fixed frame 1;

[0043] Each pressure frame 10 is rotatably mounted with a second pulley 61; when the oil pipe is placed into the fixed frame 1, the sliding friction is changed into rolling friction by the pulley 2 and the second pulley 61, so that the oil pipe can enter the fixed frame 1 better.

[0044] Specifically, a connecting plate 8 is fixedly installed on the auxiliary push frame 3. Secondary pulley pressure pieces 9 are slidably installed at both ends of the connecting plate 8. Each secondary pulley pressure piece 9 is elastically connected to the connecting plate 8 via a compression spring. Each secondary pulley pressure piece 9 is used to press down on the corresponding secondary pulley 61. Since the connecting plate 8 is fixedly installed on the auxiliary push frame 3, when the auxiliary push frame 3 moves downward, it will drive the connecting plate 8 and the pressing frame 10 downward, allowing the secondary pulley 61 to properly abut against the oil pipe. The connecting plate will drive the secondary pulley pressure pieces 9 downward, causing them to press down on the secondary pulley 61, further applying a downward force to the secondary pulley 61, thus preventing the ends of the oil pipe from tilting upward when the pressurizing member 6 presses down on the oil pipe.

[0045] Each pressure frame 10 is also elastically connected to the auxiliary push frame 3 via a torsion spring; each torsion spring provides a downward force to the corresponding pressure frame 10.

[0046] Specifically, each end of the fixed frame 1 is connected to an extrusion plate 13 via two extrusion hydraulic cylinders 11; each extrusion hydraulic cylinder 11 is rotatably mounted on the fixed frame 1, and its output end is rotatably connected to the corresponding extrusion plate 13.

[0047] Each extrusion plate 13 has a clamping mechanism, which includes two opposing pushing groups;

[0048] Each push group includes: a push cylinder 16 and a clamping plate 15; there are two push cylinders 16, which are fixedly installed on the extrusion plate 13; the clamping plate 15 is slidably installed on the extrusion plate 13 and is fixedly connected to the output end of each corresponding push cylinder 16.

[0049] Each extrusion hydraulic cylinder 11 has a connecting female block 12 fixedly installed at its output end, and a connecting male block 17 that mates with each connecting female block 12 is fixedly installed on the extrusion plate 13; each connecting female block 12 is rotatably connected to the corresponding connecting male block 17 through a corresponding insert rod 14.

[0050] Both the female connector 12 and the male connector 17 have through holes. The insert rod 14 passes through each through hole on the corresponding female connector 12 and male connector 17. When placing the oil pipe into the fixing frame 1, pull out any one of the insert rods 14, unfold the extrusion plate 13 outward, and then put the oil pipe into the fixing frame 1. After the oil pipe is put into the fixing frame 1, close the extrusion plate 13 and reinsert the insert rod 14 into the through hole on the corresponding female connector 12 and male connector 17. Start the push cylinder 16 to clamp the oil pipe through the clamping plate 15, and then start to press down and bend the oil pipe. During the pressing down and bending process, the extrusion hydraulic cylinder 11 retracts inward, so that during the bending process of the oil pipe, the two extrusion plates 13 simultaneously press the oil pipe inward, so that the pressure member 6 can bend the oil pipe better.

[0051] An extrusion process for preventing damage during hydraulic hose extrusion molding includes the following steps:

[0052] S1. Pull out any one of the insert rods 14, place the hydraulic oil pipe into the fixed frame 1, and place it on the pulley 2; then close the extrusion plate 13, and reinsert the insert rod 14 so that the oil pipe is placed into the fixed frame 1, and then start the push cylinder 16 to clamp the oil pipe;

[0053] S2. Activate each extrusion hydraulic cylinder 11, causing the two extrusion plates 13 to extrude the oil pipe inward;

[0054] S3. Start the auxiliary push hydraulic cylinder 4 and the main push cylinder 5, so that the auxiliary push frame 3 moves downward, thereby driving the auxiliary pressure head 33 and the main pressure head 63 to move downward. The oil pipe is pressed down a certain distance by the two auxiliary pressure heads 33 and the main pressure head 6. During the pressing process, the pressing speed of the main pressure head 63 is greater than that of the two auxiliary pressure heads 33.

[0055] When the auxiliary pressure head 33 and the main pressure head 63 come into contact with the oil pipe to be formed, the auxiliary pressure head 33 and the main pressure head 63 are located on the same horizontal plane and come into contact with the oil pipe to be formed synchronously.

[0056] The beneficial effects of this process flow are:

[0057] During the extrusion process of the tubing to be formed, a depression will form in the middle. This requires two driving forces: one is downward pressure, and the other is a pulling force that drives the two ends of the tubing to contract inward. Existing technologies only rely on downward extrusion through a single force in the middle. This point of force bears a large pressure, which can easily cause damage to the surface of the tubing (scratches) and the interior (stress concentration, depressions).

[0058] This application changes the point contact of the force application to a line-surface contact, and distributes the downward pressure through auxiliary and main pressure heads, reducing stress concentration. Furthermore, the increased inward thrust at both ends provides inward tension at both ends of the tubing, further reducing stress concentration. This makes the tubing less susceptible to damage during the forming process.

[0059] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. An extrusion assembly for preventing damage in the extrusion of hydraulic tubing, comprising: The utility model relates to a kind of pipe bending machine, including: Fixed frame (1);The auxiliary push frame (3) is slidably installed on the fixed frame (1), and at least one auxiliary push hydraulic cylinder (4) is fixedly installed, and each auxiliary push hydraulic cylinder (4) output end is fixedly connected with the auxiliary push frame (3); The main push cylinder (5) is fixedly installed on the auxiliary push frame (3), and the main push cylinder (5) output end is fixedly installed with pressure piece (6), and the pressure piece (6) is slidably connected with the auxiliary push frame (3);Two groups of auxiliary assemblies are slidably installed on the auxiliary push frame (3), and two groups of auxiliary assemblies are located at the both ends of the pressure piece (6) respectively, and the included angle between auxiliary assembly and pressure piece (6) is less than 90 °; Two lower pressing frames (10) are rotatably installed on the auxiliary push frame (3);Each lower pressing frame (10) is connected with the fixed frame (1) by corresponding compression elastic component (7);One end of each compression elastic component (7) is rotatably installed on the fixed frame (1), and the other end is rotatably and slidably connected with corresponding lower pressing frame (10); The fixed frame (1) is provided with an empty space (A) for bending pipe, which is located directly below the pressure piece (6); The auxiliary assembly includes: auxiliary pressure piece (31) and auxiliary pressure head (33);The auxiliary pressure piece (31) and auxiliary pressure head (33) are slidably installed on the auxiliary push frame (3);The auxiliary pressure piece (31) and auxiliary pressure head (33) are elastically connected by No. 2 compression elastic element (34);The auxiliary push frame (3) is provided with a protrusion (B) for limiting the auxiliary pressure head (33) from moving out of the auxiliary push frame (3); The pressure piece (6) is provided with a No. 2 protrusion (C) for extruding each auxiliary pressure piece (31);The main pressure head (63) is fixedly installed at the lower end of the pressure piece (6); The fixed frame (1) is provided with two groups of pulley blocks (D), which are located on both sides of the empty space on the fixed frame (1);Each pulley block (D) includes at least two pulleys (2), and each pulley (2) is rotatably installed on the fixed frame (1); One No. 2 pulley (61) is rotatably installed on each lower pressing frame (10); The auxiliary push frame (3) is fixedly installed with a connecting plate (8), and the two ends of the connecting plate (8) are slidably installed with No. 2 pulley pressing pieces (9), each of which is elastically connected with the connecting plate (8) by compression spring;Each No. 2 pulley pressing piece (9) is used to press the corresponding No. 2 pulley (61).

2. An extrusion assembly for preventing damage in the extrusion of hydraulic tubing according to claim 1, wherein The auxiliary pressure piece (31) is rotatably installed with a rotating wheel (32);The rotating wheel (32) is located between the auxiliary pressure piece (31) and the pressure piece (6).

3. The extrusion assembly of claim 1, wherein, Each lower pressing frame (10) is also elastically connected with the auxiliary push frame (3) by a torsion spring;Each torsion spring provides a downward force to the corresponding lower pressing frame (10).

4. The extrusion assembly of claim 1, wherein, The fixed frame (1) is connected with an extrusion plate (13) at both ends through at least two extrusion hydraulic cylinders (11); each extrusion hydraulic cylinder (11) is rotatably installed on the fixed frame (1) and the output end is rotatably connected with the corresponding extrusion plate (13).

5. An extrusion assembly for preventing damage in the extrusion of hydraulic tubing according to claim 4, wherein A set of clamping mechanisms are arranged on each extrusion plate (13), and the clamping mechanisms comprise two sets of oppositely arranged push groups; Each push group comprises a push cylinder (16) and a clamping plate (15); the push cylinder (16) is at least one and is fixedly installed on the extrusion plate (13); the clamping plate (15) is slidably installed on the extrusion plate (13) and is fixedly connected with the output end of each push cylinder (16).

6. An extrusion assembly for preventing damage in the extrusion of hydraulic tubing according to claim 4, wherein An connecting female block (12) is fixedly installed on the output end of each extrusion hydraulic cylinder (11), and a connecting male block (17) matched with each connecting female block (12) is fixedly installed on the extrusion plate (13); each connecting female block (12) is rotatably connected with the corresponding connecting male block (17) through a corresponding insertion rod (14); The connecting female block (12) and the connecting male block (17) are both provided with through holes, and the insertion rod (14) passes through each through hole on the connecting female block (12) and the connecting male block (17).

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