A tee pipe machining tool

Abstract

The present application relates to a kind of tee pipe processing frock, belong to tee pipe stamping technical field, by pouring full stamping water to the main pipe material, and make the stamping water reach specified water pressure in main pipe material, then carry out secondary stamping treatment, this makes the stamping water in main pipe material and the side wall of stamping space jointly press the inside wall of branch pipe, the ability of inside wall of branch pipe is improved, the inside wall of branch pipe is difficult to deform;Especially during the conversion of the distal end face of the branch pipe from a circular surface to a plane, the internal volume of the branch pipe will decrease, but the total amount of the stamping water inside the main pipe material will not change, thereby achieving the compression of the volume of the stamping water, and the force of the stamping water on the side wall of the branch pipe will further increase, ultimately resulting in the stamping force on the distal end face of the branch pipe being unable to act on the inside wall of the branch pipe.

Description

Technical Field

[0001] This invention belongs to the field of tee tube stamping technology, specifically relating to a tee tube processing tooling. Background Technology

[0002] Tee pipes are often used in refrigeration equipment to transport refrigerant liquids. Depending on the medium being transported, tee pipes are made of various materials, including cast iron, cast steel, cast copper, cast aluminum, plastic, and glass. Metal tee pipes are typically manufactured using die-stamping equipment.

[0003] In existing die-stamping equipment, when processing tee pipes, the hollow main pipe is first placed into the die cavity of the stamping equipment, and then the side wall of the main pipe is stamped, causing the side wall to protrude due to the stamping to form a branch pipe that communicates with the inside of the main pipe. Due to the limitations of this forming mechanism, the distal end of the branch pipe is still in a closed state. Therefore, it is necessary to open the distal end of the branch pipe.

[0004] Furthermore, according to the forming mechanism of the tee pipe, since the branch pipe is formed by stamping and extending the side wall of the main pipe, the far end face of the branch pipe of the formed tee pipe is an arc surface; while the end face of the branch pipe of the tee pipe is required to be flat. Therefore, after the stamping process of the tee pipe is completed, the tee pipe is usually taken out and moved to the cutting station to cut the far end of the branch pipe, so as to open the branch pipe and ensure that the far end of the branch pipe is flat.

[0005] However, existing cutting devices are limited by the cutting methods of traditional saw blades or grinding wheels, and a certain amount of allowance must be reserved to cut the far end of the branch pipe. This allowance will then be completely removed, which significantly reduces the utilization rate of materials and thus increases the processing cost of the tee pipe. Summary of the Invention

[0006] To address the problem that existing tee pipe processing methods consume excessive materials, significantly reducing material utilization and thus increasing processing costs, this invention provides a tee pipe processing fixture.

[0007] The objective of this invention can be achieved through the following technical solutions:

[0008] A tooling for processing a tee pipe includes an upper mold and a lower mold. The upper mold is vertically mounted on top of the lower mold, and the upper mold and the lower mold together form an inner cavity. A main pipe is disposed within the inner cavity, and the lower mold also has a bottom hole communicating with the inner cavity. Two stamping devices are symmetrically matched at both ends of the inner cavity. Each stamping device includes a stamping push rod that slides along the axial direction of the inner cavity and a hydraulic unit. The stamping push rod abuts against the end face of the main pipe, and a stamping hole is coaxially formed on the stamping push rod. The stamping hole communicates with the interior of the main pipe, and the hydraulic unit communicates with the stamping hole. The hydraulic unit injects stamping water into the main pipe.

[0009] It also includes a flattening assembly, which includes a flattening block disposed in the bottom hole, and the flattening block and the lower mold together form a stamping space communicating with the inner cavity;

[0010] The two stamping push rods press the main pipe together to achieve the initial stamping of the main pipe, so that the side wall of the main pipe is stamped out with a branch pipe tangent to the surface of the flattening block. The bottom surface of the far end of the branch pipe after the initial stamping is an arc surface, and the volume of the stamping water is equal to the internal volume of the main pipe after the initial stamping.

[0011] The two stamping push rods continue to press the main pipe to achieve secondary stamping of the main pipe. The bottom surface of the far end of the branch pipe after secondary stamping is flat. Then, the far end of the branch pipe after secondary stamping can be directly opened by drilling to complete the processing of the tee pipe.

[0012] As a preferred embodiment of the present invention, the stamping equipment further includes a bonding rod coaxially connected to the proximal end of the stamping push rod, wherein the outer diameter of the bonding rod is equal to the inner diameter of the main tube, and the interior of the bonding rod communicates with the stamping hole.

[0013] As a preferred embodiment of the present invention, the hydraulic unit includes a hydraulic pump and a hydraulic pipe. The two ends of the hydraulic pipe are respectively connected to a water source and the punching hole. The hydraulic pump is connected to the hydraulic pipe and is used to pump the punching water into the main pipe.

[0014] As a preferred embodiment of the present invention, the flattening assembly further includes a pressure sensor. A flattening groove is coaxially formed on the surface of the flattening block, and the pressure sensor is coaxially embedded in the flattening groove. The pressure sensor is used to determine whether the distal end of the branch pipe abuts against the flattening block during the initial stamping.

[0015] As a preferred embodiment of the present invention, the hydraulic unit further includes a water pressure sensor, which is embedded in the surface of the bonding rod and is communicatively connected to the pressure sensor. The water pressure sensor is used to detect whether the pressure water inside the main pipe is filled after the initial stamping.

[0016] As a preferred embodiment of the present invention, the surface of the flattening block is provided with an annular release groove, the maximum inner diameter of the release groove is equal to the inner diameter of the branch pipe, and the depth of the release groove is greater than the maximum height difference of the distal end face of the branch pipe.

[0017] As a preferred embodiment of the present invention, the flattening assembly further includes a flattening cylinder and a lifting device. The lower mold is also provided with a limiting slot that communicates with the bottom hole. The flattening cylinder and the lifting device are both disposed in the limiting slot. The flattening block is connected to the output end of the flattening cylinder to control the horizontal position of the flattening block. The output end of the lifting device is connected to the flattening cylinder to control the height position of the flattening block.

[0018] As a preferred embodiment of the present invention, a drilling device is also included. The drilling device includes a drilling cylinder, a rotary motor, and a pagoda drill bit. The drilling cylinder is disposed in the bottom hole. The rotary motor is connected to the output end of the drilling cylinder. The output end of the rotary motor is connected to the pagoda drill bit. The pagoda drill bit opens the distal end of the branch pipe by rotating. The initial position of the pagoda drill bit is located at the bottom of the flattening block.

[0019] As a preferred embodiment of the present invention, the drilling device further includes a drilling housing, the drilling cylinder and the rotary motor are both disposed inside the drilling housing, the top of the drilling housing is coaxially provided with an extension slot, the pagoda drill bit is located outside the drilling housing, and the pagoda drill bit is connected to the rotary motor through the extension slot.

[0020] As a preferred embodiment of the present invention, the top of the drilling housing is inclined, and the lower mold is also provided with a collection groove, which is connected to the bottom hole and is located at the lowest point of the inclined top end of the drilling housing.

[0021] The beneficial effects of this invention are as follows:

[0022] By filling the main pipe with pressurized water and ensuring it reaches a specified pressure before a second pressurization process, the pressurized water and the sidewall of the pressurization space within the main pipe work together to press the inner wall of the branch pipe. This effectively improves the deformation resistance of the branch pipe's inner wall, making it difficult for it to deform. In particular, during the transition from a curved surface to a flat surface at the distal end of the branch pipe, the internal volume of the branch pipe decreases, while the total amount of pressurized water inside the main pipe remains unchanged. This compression of the pressurized water further increases the force exerted by the pressurized water on the sidewall of the branch pipe. Ultimately, the pressurization force on the distal end of the branch pipe cannot act on the inner wall of the branch pipe; it can only act at the intersection between the inner wall and the distal end of the branch pipe. This ensures that the sidewall of the branch pipe will not deform after the second pressurization process of the main pipe. After the secondary stamping process, the distal end face of the branch pipe of the tee pipe changes from an arc surface to a flat surface. Therefore, drilling can be used to directly open the distal end of the branch pipe after the secondary stamping process, replacing the existing cutting device that needs to cut the distal end of the branch pipe to open it. Using drilling to open the distal end of the branch pipe after the secondary stamping process eliminates the need to reserve a certain amount of material for cutting the distal end of the branch pipe in advance. This allows the processing tooling of this solution to save materials, improve material utilization, and thus reduce the processing cost of the tee pipe. Attached Figure Description

[0023] To facilitate understanding by those skilled in the art, the present invention will be further described below with reference to the accompanying drawings.

[0024] Figure 1 This is an overall view of the T-shaped pipe processing fixture of the present invention when it is not in operation;

[0025] Figure 2 This is an overall view of the T-shaped pipe processing fixture of the present invention in operation;

[0026] Figure 3 This is an internal sectional view of the stamping equipment for processing tee pipes according to the present invention when it is not in operation;

[0027] Figure 4 For the present invention Figure 3 Enlarged view of point A;

[0028] Figure 5 This is an internal sectional view of the stamping equipment for processing tee pipes according to the present invention when it is in operation;

[0029] Figure 6 For the present invention Figure 5 Enlarged view of point B;

[0030] Figure 7This is a front view of the main tube of the present invention after its initial stamping.

[0031] Figure 8 This is a side sectional view of the main tube of the present invention during its initial stamping.

[0032] Figure 9 This is a side sectional view of the main tube of the present invention after secondary stamping;

[0033] Figure 10 For the present invention Figure 9 Enlarged view of point C;

[0034] Figure 11 The main tube of this invention is processed by a pagoda drill bit. Figure 9 Enlarged view of point C.

[0035] Explanation of main symbols

[0036] In the diagram: 1. Upper mold; 2. Lower mold; 201. Stamping space; 202. Collection groove; 203. Bottom hole; 3. Inner cavity; 4. Stamping equipment; 401. Stamping push rod; 4011. Stamping hole; 402. Adhesive rod; 403. Hydraulic pump; 404. Hydraulic pipe; 405. Water pressure sensor; 5. Flattening assembly; 501. Flattening block; 5011. Flattening slot; 5012. Release groove; 502. Pressure sensor; 503. Flattening cylinder; 504. Lifting device; 6. Drilling device; 601. Drilling cylinder; 602. Rotary motor; 603. Pagoda drill bit; 604. Drilling housing; 6041. Protruding slot; 7. Main pipe; 8. Branch pipe; 801. Edge ring surface; 802. Drilling ring surface. Detailed Implementation

[0037] To further illustrate the technical means and effects of the present invention in achieving its intended purpose, the following detailed description of the specific implementation methods, structures, features, and effects of the present invention, in conjunction with the accompanying drawings and preferred embodiments, is provided.

[0038] Please see Figures 1-11This embodiment provides a tooling for processing a tee pipe, including an upper mold 1 and a lower mold 2. The upper mold 1 is vertically mounted on top of the lower mold 2. When the upper mold 1 and the lower mold 2 are engaged, they together form an inner cavity 3. A main pipe 7 is disposed within the inner cavity 3. The main pipe 7 is a straight pipe with a hollow interior. The lower mold 2 also has a bottom hole 203 communicating with the inner cavity 3. A stamping device 4 is symmetrically matched at both ends of the inner cavity 3. The stamping device 4 includes a stamping push rod 401 that slides along the axial direction of the inner cavity 3 and a hydraulic unit. The stamping push rod 401 and... The end faces of the main pipe 7 abut against each other, and the stamping push rod 401 is coaxially provided with a stamping hole 4011. The stamping hole 4011 is interconnected with the interior of the main pipe 7. The hydraulic unit is connected to the stamping hole 4011 and injects stamping water into the main pipe 7. The outer diameter of the stamping push rod 401 is equal to the outer diameter of the main pipe 7, and the outer diameter of the main pipe 7 is the same as the inner diameter of the inner cavity 3. The main pipe 7 is pressed by the two stamping push rods 401, so that the side wall of the main pipe 7 is stamped and extended to form a branch pipe 8 that matches the inner diameter of the bottom hole 203.

[0039] It also includes a flattening component 5, which includes a flattening block 501. The flattening block 501 is disposed in the bottom hole 203. The flattening block 501 and the lower mold 2 together form a stamping space 201 that communicates with the inner cavity 3. The flattening block 501 is set to limit the length of the branch pipe 8 and ensure the accuracy of the stamped length of the branch pipe 8.

[0040] It should be noted that the processing fixture of this solution will perform two pressing processes on the main pipe 7, which are divided into a primary pressing stage and a secondary pressing stage. In the primary pressing stage, two pressing push rods 401 press the main pipe 7 together, so that the side wall of the main pipe 7 is pressed out to form a branch pipe 8 that is tangent to the surface of the flattening block 501. At this time, the far end face of the branch pipe 8 is an arc surface, and the far end face of the branch pipe 8 is tangent to the surface of the flattening block 501. During the primary pressing process, the hydraulic unit continuously injects pressing water into the main pipe 7. The role of the pressing water is to absorb the heat generated when the main pipe 7 is deformed, reduce the temperature of the main pipe 7, and ensure the quality of the pressing of the main pipe 7.

[0041] After the stamping water completely fills the interior of the main pipe 7 and reaches the specified water pressure, the processing fixture performs a second stamping process on the main pipe 7; the two stamping push rods 401 continue to press the main pipe 7, so that the far end face of the branch pipe 8 abuts against the surface of the flattening block 501, thereby achieving a flat far end face of the branch pipe 8 after the second stamping; it should be noted that before the second stamping, the stamping water needs to fill the interior of the main pipe 7 and the stamping water needs to reach the specified water pressure in the main pipe 7. This is because, during the transition from a circular arc to a plane at the distal end face of branch pipe 8, the distal end face of branch pipe 8 is first subjected to the stamping force and deformed. Then, the stamping force is transmitted through the distal end face of branch pipe 8 to the side wall of branch pipe 8, which may cause irreversible deformation to the side wall of branch pipe 8, ultimately resulting in substandard stamping quality of the tee pipe. This is also why existing stamping devices remove the main pipe 7 after the initial stamping and place it at the cutting station for cutting.

[0042] This solution involves filling the main pipe 7 with pressurized water, ensuring the pressurized water reaches a specified pressure within the main pipe 7, and then performing a secondary pressurization process. This causes the pressurized water within the main pipe 7 and the sidewall of the pressurization space 201 to jointly press the inner wall of the branch pipe 8, indirectly improving the deformation resistance of the inner wall of the branch pipe 8, making it difficult for the inner wall of the branch pipe 8 to deform. In particular, during the transition from a curved surface to a flat surface at the distal end of the branch pipe 8, the internal volume of the branch pipe 8 is reduced, while the volume of the branch pipe 8 is reduced. The total amount of pressurized water inside pipe 7 remains unchanged, thereby compressing the volume of pressurized water. This leads to a further increase in the force exerted by the pressurized water on the side wall of branch pipe 8. As a result, the pressurized force on the distal end face of branch pipe 8 cannot act on the inner side wall of branch pipe 8, but can only act at the intersection between the inner side wall of branch pipe 8 and the distal end face of branch pipe 8. This ensures that the side wall of branch pipe 8 will not deform after the secondary pressurization of main pipe 7. After the secondary stamping process, the distal end face of the branch pipe 8 of the tee pipe changes from an arc surface to a flat surface. Therefore, drilling can be used to directly open the distal end of the branch pipe 8 after the secondary stamping process, instead of using the existing cutting device to cut the distal end of the branch pipe 8 to open the branch pipe 8. Using drilling to open the distal end of the branch pipe 8 after the secondary stamping process eliminates the need to reserve a certain amount of material for cutting the distal end of the branch pipe 8 in advance. This allows the processing tooling of this solution to save materials, improve material utilization, and thus reduce the processing cost of the tee pipe.

[0043] It is worth noting that during the process of the distal end face of branch pipe 8 transforming from a circular arc surface to a plane, the change in the internal space of branch pipe 8 is actually very small, and the change in the internal space of branch pipe 8 is within the compressible range of the pressurizing water. This is a prerequisite for the main pipe 7 to undergo secondary pressurization smoothly. Therefore, the processing tooling of this scheme is not applicable to tee pipes of any size. The processing tooling of this scheme is only applicable to main pipe 7 with a wall thickness of less than 4mm and an initial pipe diameter of more than 40mm. In addition, it needs to be defined that the distal end face of branch pipe 8 in this scheme refers to the end face of branch pipe 8 that is away from the inner cavity 3.

[0044] Specifically, to ensure that the stamping water inside the main pipe 7 does not overflow during the stamping process, the stamping equipment 4 of this solution also includes a fitting rod 402 coaxially connected to the proximal end of the stamping push rod 401. The outer diameter of the fitting rod 402 is equal to the inner diameter of the main pipe 7, and the interior of the fitting rod 402 is connected to the stamping hole 4011 and the interior of the main pipe 7 respectively. First, it needs to be defined that the proximal end of the stamping push rod 401 in this solution refers to the end of the stamping push rod 401 that is close to the inner cavity 3; and the outer diameter of the stamping push rod 401 is equal to the outer diameter of the main pipe 7 and the inner diameter of the inner cavity 3. After the main pipe 7 is placed in the lower mold 2, the upper mold 1 and the lower mold 2 are engaged, and then the stamping equipment 4 starts to work, controlling the fitting rod 402 to extend into the interior of the main pipe 7 until the end face of the stamping push rod 401 is fitted with the end face of the main pipe 7. This setup achieves a sealing effect inside the main pipe 7.

[0045] Furthermore, to ensure the hydraulic unit can smoothly inject pressurized water into the main pipe 7, this solution's hydraulic unit includes a hydraulic pump 403 and a hydraulic pipe 404. The two ends of the hydraulic pipe 404 are connected to a water source and a pressurization hole 4011, respectively. The hydraulic pump 403 is connected to the hydraulic pipe 404 to pump the pressurized water into the main pipe 7. Additionally, it is worth noting that to prevent the pressurized water inside the main pipe 7 from overflowing through the pressurization hole 4011 during secondary pressurization, this solution's hydraulic unit also includes a check valve. The check valve is located within the pressurization hole 4011. The check valve restricts the flow direction of the pressurized water, preventing backflow.

[0046] As described in the above embodiments, the reason why the processing fixture of this solution can successfully perform secondary stamping on the main pipe 7 is that after the processing fixture performs the initial stamping on the main pipe 7, it can fill the inside of the main pipe 7 with stamping water. Therefore, in addition to determining the degree of stamping of the main pipe 7 during the initial stamping, it is also necessary to determine whether the inside of the main pipe 7 is filled with stamping water after the initial stamping. Based on this, the flattening assembly 5 of this solution also includes a pressure sensor 502. The surface of the flattening block 501 is coaxially provided with a flattening slot 5011. The pressure sensor 502 is coaxially embedded in the flattening slot 5011. The pressure sensor 502 is used to determine whether the distal end of the branch pipe 8 abuts against the flattening block 501 during the initial stamping. Since the initial stamping... During this period, the distal end face of the branch pipe 8 is in an arc surface, and the center of this arc surface must be the surface of the flattening block 501 that is closest to the distal end face of the branch pipe 8. Therefore, if the distal end face of the branch pipe 8 is in tangential fit with the surface of the flattening block 501, the center of the distal end face of the branch pipe 8 must first be tangentially fitted with the surface of the flattening block 501. Based on this characteristic, this solution is provided with a flattening slot 5011, and the pressure sensor 502 is set in the flattening slot 5011. Due to the special position of the flattening slot 5011, the pressure sensor 502 can directly detect the moment when the distal end face of the branch pipe 8 abuts against the surface of the flattening block 501. At this time, the stamping push rod 401 is controlled to stop sliding, and the initial stamping process of the main pipe 7 is completed.

[0047] Furthermore, in order to determine whether the main pipe 7 is filled with pressurizing water after the initial pressurization, the hydraulic unit of this solution also includes a water pressure sensor 405. The water pressure sensor 405 is embedded in the surface of the bonding rod 402 and is communicatively connected to the pressure sensor 502. The water pressure sensor 405 is used to detect whether the pressurizing water inside the main pipe 7 is filled after the initial pressurization. By setting the water pressure sensor 405, the working principle of the water pressure sensor 405 is to preset a water pressure value in the water pressure sensor 405. This preset water pressure value can only be reached when the pressurizing water is filled to the main pipe 7. When the water pressure sensor 405 detects that the current water pressure value has reached the preset water pressure value, it is determined that the pressurizing water has filled the main pipe 7.

[0048] In addition, the end face of the branch pipe 8 at the far end of this scheme can be positioned as an edge ring surface 801 and a drilling ring surface 802 set coaxially. The edge ring surface 801 is the end face of the branch pipe 8 at the far end of the tee pipe after the opening treatment is completed; while the drilling ring surface 802 is the end face of the branch pipe 8 at the far end of the branch pipe after the main pipe 7 has completed the secondary stamping. It should be noted that during the secondary pressing process when the distal end face of the branch pipe 8 is in contact with the surface of the flattening block 501, the combined force exerted on the sidewall of the branch pipe 8 by the flushing water and the sidewall of the bottom hole 203 prevents the flushing force on the distal end face of the branch pipe 8 from affecting the sidewall of the branch pipe 8, thus preventing deformation of the sidewall of the branch pipe 8. Therefore, the flushing force on the distal end face of the branch pipe 8 ultimately acts on the distal end face of the branch pipe 8. Based on this, in order to reduce the deformation of the edge annular surface 801 during the secondary pressing, the surface of the flattening block 501 is provided with an annular release groove 5012. The maximum inner diameter of the release groove 5012 is equal to the inner diameter of the branch pipe 8, and the depth of the release groove 5012 is greater than the maximum height difference of the distal end face of the branch pipe 8. By providing the annular release groove 5012, due to... The dimensions of the release groove 5012, projected onto the distal end face of the branch pipe 8, are all located on the drilled annular surface 802, and the maximum inner diameter of the release groove 5012 is equal to the inner diameter of the branch pipe 8. This causes the impact stress generated by the edge annular surface 801 when it presses against the surface of the flattening block 501 to move towards the drilled annular surface 802, ultimately causing deformation of the internal structure of the drilled annular surface 802. Similarly, when the drilled annular surface 802 presses against the surface of the flattening block 501, the impact stress generated by the drilled annular surface 802 projects onto the surface of the flattening block 501 at the location of the release groove 5012, also ultimately causing deformation of the internal structure of the drilled annular surface 802. It is important to note that the deformation of the drilled annular surface 802 ultimately occurs within the release groove 5012. In this way, the structure of the edge annular surface 801 is protected.

[0049] It is worth mentioning that the structure of the protective edge ring 801 described in this solution is such that during the secondary stamping process, the arc-shaped edge ring 801 can be transformed into a planar edge ring 801, and when the surface of the edge ring 801 is deformed, it will not cause further deformation to the internal structure of the edge ring 801 region, i.e., the side wall position of the branch pipe 8.

[0050] As described in the above embodiments, after the main pipe 7 completes the second stamping, the distal end of the branch pipe 8 after the second stamping can be directly opened by drilling to complete the processing of the tee pipe. However, it is worth noting that when the main pipe 7 completes the second stamping, the stamping water inside the main pipe 7 is under high pressure. When the stamping push rod 401 slides outward from the main pipe 7, the stamping water will surge due to the expansion of the space inside the main pipe 7. However, the internal space of the main pipe 7 is still sealed at this time, which causes the stamping water to form a "water hammer wave" that continuously impacts the inside of the main pipe 7. This can easily induce fatigue cracks at the connection between the main pipe 7 and the branch pipe 8, affecting the stamping quality of the tee pipe.

[0051] To address this issue, this solution involves directly drilling a hole in the distal end face of branch pipe 8. This approach offers two advantages: First, it allows for the complete processing of the tee pipe in one go, eliminating the need to take it to other workstations for opening, thus saving significant time and simplifying the processing steps. Second, by opening the distal end face of branch pipe 8, the sealing of the main pipe 7 is released, allowing the pressurized water inside the main pipe 7 to flow out through the opening in branch pipe 8. Furthermore, the pressurized water will not trigger a "water hammer wave" phenomenon during its outflow, thereby ensuring the pressurization quality of the tee pipe.

[0052] Based on this, in order to enable the opening of the far end face of the branch pipe 8 of the tee pipe directly after the secondary stamping, this solution requires the pre-disengagement of the flattening block 501 from the far end face of the branch pipe 8. The flattening assembly 5 in this solution also includes a flattening cylinder 503 and a lifting device 504. The lower mold 2 is also provided with a limiting slot communicating with the bottom hole 203. Both the flattening cylinder 503 and the lifting device 504 are located within the limiting slot. The flattening block 501 is connected to the output end of the flattening cylinder 503 to control the flattening block. The horizontal position of 501 enables the flattening block 501 to move from the position of the bottom hole 203 to the limit slot; the output end of the lifting device 504 is connected to the flattening cylinder 503 to control the height position of the flattening block 501; with the flattening cylinder 503 and the lifting device 504, the lifting device 504 first starts to work, controlling the flattening block 501 to release its contact with the far end face of the branch pipe 8; then the flattening cylinder 503 starts to work, controlling the flattening block 501 to move from the position of the bottom hole 203 to the limit slot.

[0053] In addition, this solution also includes a drilling device 6, which includes a drilling cylinder 601, a rotary motor 602, and a pagoda drill bit 603. The drilling cylinder 601 is installed in the bottom hole 203. The rotary motor 602 is connected to the output end of the drilling cylinder 601. The output end of the rotary motor 602 is connected to the pagoda drill bit 603. The pagoda drill bit 603 opens the far end of the branch pipe 8 by rotating. The initial position of the pagoda drill bit 603 is located at the bottom of the flattening block 501, and the pagoda drill bit 603 is coaxially located in the bottom hole 203. With the drilling device 6 installed, after the flattening block 501 retracts into the limiting slot, the rotary motor 602 starts to work, controlling the pagoda drill bit 603 to rotate. At the same time, the drilling cylinder 601 also starts to work, controlling the height of the pagoda drill bit 603, so that the pagoda drill bit 603 opens the far end face of the branch pipe 8.

[0054] It is worth noting that this solution requires the use of a pagoda drill bit 603, i.e., a tapered drill bit. This is because the moment the drill bit opens the distal end face of the branch pipe 8, the high-pressure flushing water inside the main pipe 7 will overflow directly from the opening. During the overflow, it will cause a huge impact on the opening and the surrounding structure. Therefore, if a drill bit with the same diameter as the inner wall of the branch pipe 8 is used to open the distal end face of the branch pipe 8, it will cause a huge impact on the side wall of the branch pipe 8, affecting the stamping quality of the tee pipe. Therefore, this solution uses a pagoda drill bit 603 to open the branch pipe 8. The diameter of the opening is smaller than the diameter of the drilling annular surface 802. In this way, even if the opening and its surrounding area are impacted by flushing water, the impact of the flushing water on the distal end face of the branch pipe 8 can be controlled within the range of the drilling annular surface 802, thereby avoiding a huge impact on the side wall of the branch pipe 8.

[0055] It is worth mentioning that this plan Figure 9 The wavy lines depict the potential deformation position of the distal end face of the branch pipe 8 after the main pipe 7 undergoes secondary stamping. Figure 10 This shows the possible deformation location of the edge annular surface 801 of the main pipe 7 after secondary stamping.

[0056] In addition, it should be noted that during the secondary stamping process of the branch pipe 8, especially when the edge annular surface 801 is stamped from an arc surface to a plane, the inner wall of the branch pipe 8 will inevitably undergo slight deformation. Another advantage of using the pagoda drill bit 603 in this solution is that the inner wall of the far end of the branch pipe 8 can be rounded directly by the pagoda drill bit 603 to eliminate the slight deformation of the inner wall of the branch pipe 8.

[0057] Furthermore, to prevent the rotary motor 602 and drilling cylinder 601 from directly contacting the pressurizing water, the drilling device 6 in this solution also includes a hollow drilling housing 604. Both the drilling cylinder 601 and the rotary motor 602 are housed within the drilling housing 604. A protruding slot 6041 is coaxially formed at the top of the drilling housing 604. A pagoda drill bit 603 is located outside the drilling housing 604 and is connected to the rotary motor 602 through the protruding slot 6041. By including the drilling housing 604, direct contact between the rotary motor 602 and the drilling cylinder 601 and the pressurizing water can be avoided, thus preventing damage to these components. It should be noted that both the rotary motor 602 and the drilling cylinder 601 in this solution possess a certain degree of waterproofing. Meanwhile, in order to ensure the heat dissipation performance of the drilling housing 604, a heat dissipation slot is also provided at the bottom of the drilling housing 604. The heat inside the drilling housing 604 can be directly transferred to the external environment through the heat dissipation slot, ensuring the normal heat dissipation of the rotary motor 602 and the drilling cylinder 601.

[0058] As described in the above embodiments, the pagoda drill bit 603 needs to be coaxially installed inside the bottom hole 203 to ensure that the end face of the branch pipe 8 can be opened without damaging the side wall of the branch pipe 8. In order to ensure that the pagoda drill bit 603 is always coaxially installed with the bottom hole 203, the cross-sectional shape of the drill housing 604 in this solution is the same as the cross-sectional shape of the bottom hole 203. This arrangement makes the side wall of the drill housing 604 fit against the side wall of the bottom hole 203. When the drill housing 604 is installed into the bottom hole 203, the coaxial cooperation between the pagoda drill bit 603 and the bottom hole 203 is directly realized, avoiding deviations in the cooperation relationship between the pagoda drill bit 603 and the bottom hole 203 due to installation errors.

[0059] Furthermore, when the pagoda drill bit 603 opens the far end of the branch pipe 8, iron filings will remain in the bottom hole 203. In order to collect the iron filings in the bottom hole 203 for convenient centralized treatment, the top of the drilling housing 604 is inclined, and the lower mold 2 is also provided with a collection groove 202. The collection groove 202 is connected to the bottom hole 203 and is located at the lowest point of the inclined top end of the drilling housing 604. By providing the collection groove 202, when the pagoda drill bit 603 opens the far end of the branch pipe 8, the remaining iron filings will fall onto the top surface of the drilling housing 604 and fall into the collection groove 202 as they fall from the surface of the drilling housing 604, thus collecting the iron filings remaining in the bottom hole 203 and ensuring the normal operation of the device.

[0060] It should be noted that when the pagoda drill bit 603 is opening the far end face of the branch pipe 8, the hydraulic unit restarts and injects pressurized water into the main pipe 7. The pressurized water in the main pipe 7 will flow through the branch pipe 8 into the bottom hole 203. The bottom hole 203 is provided with a groove for draining the pressurized water, so the pressurized water will not accumulate in the bottom hole 203. The iron filings adhering to the side wall of the bottom hole 203 will eventually fall into the collection tank 202 due to the pressurized water.

[0061] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present invention. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the scope of the present invention.

Claims

1. A tee fitting machining tool, characterized by: The utility model relates to a three -way pipe processing device, including upper mould and lower mould, upper mould is set in the top of lower mould lifts, upper mould and lower mould form the inner chamber jointly, and the main pipe material is arranged in the inner chamber, and the lower mould is also provided with the bottom hole who communicates with the inner chamber, the both ends of the inner chamber are matched with the stamping equipment respectively, the stamping equipment includes the stamping push rod who slides along the axis direction of the inner chamber and the hydraulic unit, and the stamping push rod is with the end surface of main pipe material and is in close contact, the stamping push rod coaxially is provided with the stamping hole, the stamping hole and the inside of main pipe material are communicated with each other, the hydraulic unit communicates with the stamping hole, and the hydraulic unit pours the stamping water towards the inside of main pipe material, It also includes a flattening assembly, the flattening assembly includes a flattening block, the flattening block is arranged in the bottom hole, the flattening block and the lower mould form the stamping space which communicates with the inner chamber, Two stamping push rods press the main pipe material together, realize the primary stamping of main pipe material, so that the side wall of main pipe material is stamped out the branch pipe which is tangent to the surface of the flattening block, the distal end surface of the branch pipe after primary stamping is a circular arc surface, and the volume of the stamping water is equal to the internal volume of the main pipe material after primary stamping, Two stamping push rods continue to press the main pipe material, realize the secondary stamping of main pipe material, the distal end surface of the branch pipe after secondary stamping is a plane, then the distal end of the branch pipe after secondary stamping can be directly opened by drilling, and the processing of the three-way pipe is completed, The flattening assembly further includes a pressure sensor, the surface of the flattening block is coaxially provided with a flattening slot, and the pressure sensor is coaxially embedded in the flattening slot, the pressure sensor is used to determine whether the distal end of the branch pipe is in close contact with the flattening block during primary stamping, The stamping device further includes a fitting rod coaxially connected to the proximal end of the stamping push rod, The hydraulic unit further includes a water pressure sensor, the water pressure sensor is embedded in the surface of the fitting rod, the water pressure sensor is in communication with the pressure sensor, and the water pressure sensor is used to detect whether the stamping water in the main pipe material after primary stamping is full in the main pipe material, The flattening assembly further includes a flattening cylinder and a lifting device, the lower mould is also provided with a limiting slot which communicates with the bottom hole, the flattening cylinder and the lifting device are arranged in the limiting slot, the flattening block is connected with the output end of the flattening cylinder to control the horizontal position of the flattening block, and the output end of the lifting device is connected with the flattening cylinder to control the height position of the flattening block.

2. The tee pipe machining tooling fixture of claim 1, wherein: The outer diameter of the fitting rod is equal to the inner diameter of the main pipe material, and the inside of the fitting rod communicates with the stamping hole.

3. The tee pipe machining tooling fixture of claim 1, wherein: The hydraulic unit includes a hydraulic pump and a hydraulic pipe, the both ends of the hydraulic pipe are in communication with a water source and the stamping hole respectively, the hydraulic pump is connected with the hydraulic pipe for pumping the stamping water into the main pipe material.

4. The tee pipe machining tooling fixture of claim 1, wherein: The surface of the flattening block is provided with an annular release slot, the maximum inner diameter of the release slot is equal to the inner diameter of the branch pipe, and the depth of the release slot is greater than the maximum height difference of the distal end surface of the branch pipe.

5. The tee pipe machining tooling fixture of claim 1, wherein: The drilling device comprises a drilling cylinder, a rotary motor and a pyramid drill bit, the drilling cylinder is arranged in the bottom hole, the rotary motor is connected with the output end of the drilling cylinder, the output end of the rotary motor is connected with the pyramid drill bit, the pyramid drill bit is used for opening the distal end of the branch pipe by rotation, and the initial position of the pyramid drill bit is located at the bottom of the flattening block.

6. The tee pipe machining tooling fixture of claim 5, wherein: The drilling device further comprises a drilling shell, the drilling cylinder and the rotary motor are arranged in the drilling shell, a top of the drilling shell is coaxially provided with an extension slot, the pyramid drill bit is located outside the drilling shell, and the pyramid drill bit is connected with the rotary motor through the extension slot.

7. The tee pipe machining tooling fixture of claim 6, wherein: The top of the drilling shell is arranged in an inclined manner, the lower mold is further provided with a collecting groove, the collecting groove is communicated with the bottom hole, and the collecting groove is located at the lowest position of the inclined end of the top of the drilling shell.

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