Three-way pipe machining tool

Abstract

The invention relates to a three-way pipe machining tool, and belongs to the technical field of three-way pipe stamping, a main pipe is filled with stamping water, and after the stamping water reaches the specified water pressure in the main pipe, secondary stamping treatment is carried out, so that the stamping water in the main pipe and the side wall of a stamping space jointly press the inner side wall of a branch pipe, and the three-way pipe is machined. The anti-deformation capability of the inner side wall of the branch pipe is improved in a disguised manner, so that the inner side wall of the branch pipe is difficult to deform; particularly, when the far-end end face of the branch pipe is converted into a plane from an arc surface, the internal volume of the branch pipe can be reduced, the total amount of the stamping water in the main pipe cannot be changed, then compression of the volume of the stamping water is achieved, the acting force of the stamping water on the side wall of the branch pipe can be further improved, and the service life of the branch pipe is prolonged. The final result is that the stamping acting force on the far-end end face of the branch pipe cannot act on the inner side wall of the branch pipe.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of tee pipe stamping, and particularly relates to a tee pipe machining tool. BACKGROUND

[0002] The tee pipe often bears the role of conveying refrigerant liquid in refrigeration equipment. Due to the difference of conveying medium, the material of the tee pipe is divided into cast iron, cast steel, cast copper, cast aluminum, plastic, glass and the like, and the tee pipe of metal texture is usually formed by using a die stamping forming device in production and manufacturing.

[0003] The existing die stamping forming device, when machining the tee pipe, first places the internally hollow main pipe in the die cavity of the stamping device, and then performs stamping treatment on the side wall of the main pipe, so that the side wall of the main pipe is stretched to form a branch pipe which is in communication with the inside of the main pipe. Limited by the forming mechanism, the distal end of the branch pipe is still in a closed state, and therefore, the distal end of the branch pipe needs to be opened. In addition, according to the forming mechanism of the tee pipe, since the branch pipe is formed by stretching the side wall of the main pipe material, the distal end face of the branch pipe of the formed tee pipe is a circular arc face. Therefore, after the stamping treatment of the tee pipe is completed, the tee pipe is usually taken out and moved to a cutting station to perform cutting treatment on the distal end of the branch pipe, so as to realize the opening of the distal end of the branch pipe and ensure that the distal end of the branch pipe is a plane.

[0004] However, the existing cutting device is limited by the cutting mode of the traditional saw blade or grinding wheel, and a certain amount of excess must be reserved for cutting the distal end of the branch pipe. The excess will be cut off as a whole subsequently, which significantly reduces the utilization rate of the material and further increases the machining cost of the tee pipe. SUMMARY

[0005] In order to solve the problem that the machining mode of the existing tee pipe consumes too much material, significantly reduces the utilization rate of the material and further increases the machining cost of the tee pipe, the present application provides a tee pipe machining tool.

[0006] The purpose of the present application can be achieved by the following technical solutions: A tee pipe machining tool, comprising an upper die and a lower die, the upper die being arranged on the top of the lower die in a lifting manner, the upper die and the lower die jointly forming an inner cavity, a main pipe material being arranged in the inner cavity, and the lower die further being provided with a bottom hole in communication with the inner cavity; two ends of the inner cavity are respectively and symmetrically matched with stamping devices, the stamping device comprising a stamping push rod sliding along the axial direction of the inner cavity and a hydraulic unit, the stamping push rod being in abutting contact with the end face of the main pipe material, the stamping push rod being coaxially provided with a stamping hole, the stamping hole being in communication with the inside of the main pipe material, the hydraulic unit being in communication with the stamping hole, and the hydraulic unit being used for injecting stamping water into the main pipe material. The pressing assembly comprises a pressing block arranged in the bottom hole and cooperated with the lower die to form a stamping space in communication with the inner cavity. The two stamping push rods press the main pipe together to realize the primary stamping of the main pipe, so that the side wall of the main pipe is stamped to be tangent to the surface of the pressing block, the distal end bottom surface of the branch pipe after the primary stamping is a circular surface, and the volume of the stamping water is equal to the internal volume of the main pipe after the primary stamping. The two stamping push rods continue to press the main pipe to realize the secondary stamping of the main pipe, the distal end bottom surface of the branch pipe after the secondary stamping is a plane, and then the distal end of the branch pipe after the secondary stamping can be directly opened by drilling to complete the processing of the tee pipe.

[0007] As a preferred technical solution of the present application, the stamping device further comprises a fitting rod coaxially connected to the proximal end of the stamping push rod, the outer diameter of the fitting rod is equal to the inner diameter of the main pipe, and the inner part of the fitting rod is in communication with the stamping hole.

[0008] As a preferred technical solution of the present application, the hydraulic unit comprises a hydraulic pump and a hydraulic pipe, two ends of the hydraulic pipe are respectively in communication with a water source and the stamping hole, and the hydraulic pump is connected with the hydraulic pipe to pump the stamping water into the main pipe.

[0009] As a preferred technical solution of the present application, the pressing assembly further comprises a pressure sensor, a pressing groove is coaxially arranged on the surface of the pressing block, the pressure sensor is coaxially embedded in the pressing groove, and the pressure sensor is used to determine whether the distal end of the branch pipe is in abutting contact with the pressing block during the primary stamping.

[0010] As a preferred technical solution of the present application, the hydraulic unit further comprises a water pressure sensor, the water pressure sensor is embedded on the surface of the fitting rod, the water pressure sensor is in communication connection with the pressure sensor, and the water pressure sensor is used to detect whether the stamping water in the main pipe after the primary stamping is full in the main pipe.

[0011] As a preferred technical solution of the present application, an annular release groove is arranged on the surface of the pressing block, 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 surface of the branch pipe.

[0012] As a preferred technical scheme of the present application, the flattening assembly further comprises a flattening cylinder and a lifting device, the lower mold is further provided with a limiting slot hole in communication with the bottom hole, the flattening cylinder and the lifting device are arranged in the limiting slot hole, 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.

[0013] As a preferred technical scheme of the present application, the drilling device further comprises a drilling cylinder, a rotary motor and a pagoda 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 pagoda drill bit, the pagoda drill bit is used for opening processing the distal end of the branch pipe through rotation, and the initial position of the pagoda drill bit is located at the bottom of the flattening block.

[0014] As a preferred technical scheme of the present application, the drilling device further comprises a drilling cylinder, a rotary motor and a pagoda 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 pagoda drill bit, the pagoda drill bit is used for opening processing the distal end of the branch pipe through rotation, and the initial position of the pagoda drill bit is located at the bottom of the flattening block.

[0015] As a preferred technical scheme of the present application, the top of the drilling shell is arranged in an inclined manner, the lower mold is further provided with a collecting groove in communication 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.

[0016] The present application has the following beneficial effects: By pouring full stamping water into the main pipe material, and after the stamping water reaches the specified water pressure in the main pipe material, secondary stamping treatment is carried out, which makes the stamping water in the main pipe material and the side wall of the stamping space press the inner side wall of the branch pipe together, thereby improving the anti-deformation ability of the inner side wall of the branch pipe, making it difficult for the inner side wall of the branch pipe to deform; especially during the conversion of the distal end face of the branch pipe from a circular arc face to a plane, the internal volume of the branch pipe will be reduced, while the total amount of stamping water in the main pipe material will not change, thereby realizing the compression of the volume of the stamping water, and further increasing the force of the stamping water on the side wall of the branch pipe, ultimately resulting in the fact that the stamping force on the distal end face of the branch pipe cannot act on the inner side wall of the branch pipe, but at most can act on the intersection between the inner side wall of the branch pipe and the distal end face of the branch pipe, thereby ensuring that the side wall of the branch pipe will not deform after the secondary stamping treatment of the main pipe material. After the secondary stamping treatment, the distal end face of the branch pipe of the tee pipe changes from a circular arc face to a plane, so that the distal end of the branch pipe after secondary stamping can be directly opened by drilling, instead of cutting the distal end of the branch pipe of the tee pipe to achieve opening of the branch pipe. By using drilling to open the distal end of the branch pipe after secondary stamping, it is not necessary to reserve a certain amount of excess material for cutting the distal end of the branch pipe, so that the machining tool of the present application can save materials, improve the utilization rate of materials, and thus reduce the processing cost of the tee pipe. BRIEF DESCRIPTION OF DRAWINGS

[0017] In order to facilitate the understanding of those skilled in the art, the present application will be further described below with reference to the accompanying drawings.

[0018] Figure 1 is a whole view of the tee pipe machining tool of the present application when not working; Figure 2 is a whole view of the tee pipe machining tool of the present application when working; Figure 3 is an internal sectional view of the stamping device of the tee pipe machining tool of the present application when not working; Figure 4 is an enlarged view of A of the present application; Figure 3 Figure 5 is an internal sectional view of the stamping device of the tee pipe machining tool of the present application when working; Figure 6 is an enlarged view of B of the present application; Figure 5 Figure 7 is a front view of the main pipe material of the present application after primary stamping; Figure 8 is a side sectional view of the main pipe material of the present application after primary stamping; Figure 9 ​​A side sectional view of the main pipe material of the present application after secondary stamping; Figure 10 A side sectional view of the main pipe material of the present application after secondary stamping; Figure 9 A side sectional view of the main pipe material of the present application after secondary stamping; Figure 11 A side sectional view of the main pipe material of the present application after secondary stamping; Figure 9 A side sectional view of the main pipe material of the present application after secondary stamping.

[0019] Main symbol explanation In the figure: 1, upper die; 2, lower die; 201, stamping space; 202, collection groove; 203, bottom hole; 3, inner cavity; 4, stamping equipment; 401, stamping push rod; 4011, stamping hole; 402, fitting rod; 403, hydraulic pump; 404, hydraulic pipe; 405, water pressure sensor; 5, flattening assembly; 501, flattening block; 5011, flattening groove hole; 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 shell; 6041, extension groove hole; 7, main pipe material; 8, branch pipe; 801, edge torus; 802, drilling torus. DETAILED DESCRIPTION

[0020] In order to further illustrate the technical means and effects adopted by the present application to achieve the predetermined object, the specific embodiments, structures, features and effects according to the present application are described in detail below in combination with the drawings and preferred embodiments.

[0021] Please refer to Figures 1-11 The present embodiment provides a tee pipe machining tool, which comprises an upper die 1 and a lower die 2. The upper die 1 is arranged on the top of the lower die 2 in a lifting manner. When the upper die 1 and the lower die 2 are buckled, the upper die 1 and the lower die 2 jointly form an inner cavity 3. A main pipe material 7 is arranged in the inner cavity 3. The main pipe material 7 is a straight pipe with an internal cavity. The lower die 2 is also provided with a bottom hole 203 which is in communication with the inner cavity 3. The two ends of the inner cavity 3 are respectively and symmetrically matched with stamping equipment 4. The stamping equipment 4 comprises a stamping push rod 401 which slides along the axis direction of the inner cavity 3 and a hydraulic unit. The stamping push rod 401 is in abutting fit with the end face of the main pipe material 7. The stamping push rod 401 is coaxially provided with a stamping hole 4011. The stamping hole 4011 is in mutual communication with the inside of the main pipe material 7. The hydraulic unit is in communication with the stamping hole 4011. The hydraulic unit injects stamping water into the main pipe material 7. The outer diameter size of the stamping push rod 401 is equal to the outer diameter size of the main pipe material 7. The outer diameter size of the main pipe material 7 is the same as the inner diameter size of the inner cavity 3. The two stamping push rods 401 jointly press the main pipe material 7, so that the side wall of the main pipe material 7 is stamped to extend a branch pipe 8 which is matched with the inner diameter size of the bottom hole 203.

[0022] The flattening assembly 5 comprises a flattening block 501 arranged in the bottom hole 203, and the flattening block 501 cooperates with the lower die 2 to form a stamping space 201 in communication with the inner cavity 3.

[0023] It should be noted that the machining tool of the present scheme will press the main pipe 7 twice, which is divided into a primary stamping stage and a secondary stamping stage. In the primary stamping stage, the two stamping push rods 401 press the main pipe 7 together, so that the side wall of the main pipe 7 is stamped to be tangent to the surface of the flattening block 501. At this time, the distal end surface of the branch pipe 8 is a circular arc surface, and the distal end surface of the branch pipe 8 is tangent to the surface of the flattening block 501. In the process of primary stamping, the hydraulic unit continuously injects stamping water into the main pipe 7. At this time, the stamping water functions to absorb the heat generated when the main pipe 7 deforms, thereby reducing the temperature of the main pipe 7 and ensuring the quality of the stamping of the main pipe 7.

[0024] After the stamping water completely fills the inside of the main pipe 7 and reaches the specified water pressure in the main pipe 7, the machining tool performs secondary stamping on the main pipe 7. The two stamping push rods 401 continue to press the main pipe 7, so that the distal end surface of the branch pipe 8 is in close contact with the surface of the flattening block 501, thereby realizing that the distal end surface of the branch pipe 8 after secondary stamping is a flat surface. It should be noted that before secondary stamping, the stamping water needs to fill the inside 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 transformation of the distal end surface of the branch pipe 8 from a circular arc surface to a flat surface, the distal end surface of the branch pipe 8 will first be deformed by the stamping force, and then the stamping force will be transmitted to the side wall of the branch pipe 8 through the distal end surface of the branch pipe 8, which may cause irreversible deformation of the side wall of the branch pipe 8, ultimately resulting in poor stamping quality of the tee pipe. This is also the reason why the existing stamping device takes out the main pipe 7 after primary stamping and places it in the cutting station for cutting processing.

[0025] The present scheme can improve the anti-deformation ability of the inner side wall of the branch pipe 8 by filling the stamping water into the main pipe 7 and then performing secondary stamping treatment when the stamping water reaches a specified water pressure in the main pipe 7, so that the stamping water in the main pipe 7 and the side wall of the stamping space 201 press the inner side wall of the branch pipe 8 together, which makes it difficult for the inner side wall of the branch pipe 8 to deform. Especially during the conversion of the distal end face of the branch pipe 8 from a circular arc surface to a flat surface, the internal volume of the branch pipe 8 will decrease, but the total amount of stamping water in the main pipe 7 will not change, thereby achieving compression of the volume of the stamping water, which further increases the force of the stamping water on the side wall of the branch pipe 8. The result is that the stamping force on the distal end face of the branch pipe 8 cannot act on the inner side wall of the branch pipe 8, but at most can act on the intersection between the inner side wall of the branch pipe 8 and the distal end face of the branch pipe 8, thereby ensuring that the side wall of the branch pipe 8 will not deform after the secondary stamping treatment of the main pipe 7. After the secondary stamping treatment, the distal end face of the branch pipe 8 of the tee pipe becomes a flat surface, so the distal end of the branch pipe 8 after secondary stamping can be directly opened by drilling, instead of cutting the distal end of the branch pipe 8 of the tee pipe to achieve opening of the branch pipe 8. By using drilling to open the distal end of the branch pipe 8 after secondary stamping, there is no need to reserve a length of excess material for cutting the distal end of the branch pipe 8, so that the processing tool of the present scheme can save materials, improve material utilization, and thus reduce the processing cost of the tee pipe.

[0026] It is worth noting that during the conversion of the distal end face of the branch pipe 8 from a circular arc surface to a flat surface, the internal space of the branch pipe 8 actually changes very little, and the change in the internal space of the branch pipe 8 is within the compressible range of the stamping water, which is a prerequisite for the main pipe 7 to successfully perform secondary stamping. Therefore, the processing tool of the present scheme is not suitable for any size of tee pipe; the processing tool of the present scheme can only be used for main pipes 7 with a wall thickness of less than 4 mm and an initial pipe diameter of more than 40 mm. In addition, it needs to be defined that the distal end face of the branch pipe 8 of the present scheme refers to the end face of the branch pipe 8 away from the inner cavity 3.

[0027] Specifically, in order to ensure that the stamping water inside the main pipe 7 does not overflow during the stamping process, the stamping device 4 further comprises 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 inner part of the fitting rod 402 is respectively communicated with the stamping hole 4011 and the inside of the main pipe 7. First of all, it needs to be defined that the proximal end of the stamping push rod 401 refers to the end of the stamping push rod 401 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 outer diameter of the stamping push rod 401 is equal to the inner diameter of the inner cavity 3; After placing the main pipe 7 in the lower die 2, the upper die 1 and the lower die 2 are buckled, then the stamping device 4 starts to work, the fitting rod 402 is controlled to extend into the inside of the main pipe 7, until the end face of the stamping push rod 401 is in close contact with the end face of the main pipe 7. Through such a setting, the sealing effect of the inside of the main pipe 7 is realized.

[0028] Further, in order to realize that the hydraulic unit can smoothly inject the stamping water into the main pipe 7, the hydraulic unit comprises a hydraulic pump 403 and a hydraulic pipe 404, the two ends of the hydraulic pipe 404 are respectively communicated with the water source and the stamping hole 4011, the hydraulic pump 403 is connected with the hydraulic pipe 404, for pumping the stamping water into the main pipe 7. In addition, it is also worth mentioning that in order to avoid the stamping water in the main pipe 7 from overflowing through the stamping hole 4011 when the main pipe 7 is subjected to secondary stamping, the hydraulic unit further comprises a one-way valve, the one-way valve is arranged in the stamping hole 4011, and the one-way valve can limit the flow direction of the stamping water, and the reverse flow situation will not occur.

[0029] According to the description of the above embodiment, the reason why the machining tool can successfully perform secondary stamping on the main pipe 7 is that the machining tool can fill the main pipe 7 with stamping water after performing primary stamping on the main pipe 7. Therefore, in addition to determining the stamping degree of the primary stamping on the main pipe 7, it is also necessary to determine whether the stamping water in the main pipe 7 is filled after the primary stamping on the main pipe 7. Based on this, the flattening assembly 5 of the present scheme further comprises a pressure sensor 502, and a flattening groove hole 5011 is coaxially arranged on the surface of the flattening block 501. The pressure sensor 502 is coaxially embedded in the flattening groove hole 5011, and the pressure sensor 502 is used to determine whether the distal end of the branch pipe 8 is in abutting contact with the flattening block 501 during the primary stamping. Since the distal end surface of the branch pipe 8 is in the form of a circular arc during the primary stamping, and the center of the circular arc is necessarily the surface of the flattening block 501 closest to the surface of the flattening block 501, if the distal end surface of the branch pipe 8 is in tangential contact with the surface of the flattening block 501, the center of the distal end surface of the branch pipe 8 will first be in tangential contact with the surface of the flattening block 501. Based on this feature, the present scheme is provided with the flattening groove hole 5011, and the pressure sensor 502 is arranged in the flattening groove hole 5011. Due to the special position of the flattening groove hole 5011, the moment when the distal end surface of the branch pipe 8 is in abutting contact with the surface of the flattening block 501 can be directly detected by the pressure sensor 502. At this time, the stamping push rod 401 is stopped from sliding, and the primary stamping process of the main pipe 7 is completed.

[0030] Further, in order to determine whether the stamping water is filled in the main pipe 7 after the primary stamping of the main pipe 7, the hydraulic unit of the present scheme further comprises a water pressure sensor 405, which is embedded on the surface of the abutting rod 402. The water pressure sensor 405 is in communication connection with the pressure sensor 502, and the water pressure sensor 405 is used to detect whether the stamping water in the main pipe 7 after the primary stamping is filled in the main pipe 7. By providing the water pressure sensor 405, the working principle of the water pressure sensor 405 is to pre-set a water pressure value in the water pressure sensor 405. This pre-set water pressure value can only be reached when the stamping water is filled in the main pipe 7. When the water pressure sensor 405 detects that the current water pressure value reaches the pre-set water pressure value, it is determined that the stamping water is filled in the main pipe 7 at this time.

[0031] Further, the end face of the distal end of the branch pipe 8 can be positioned coaxially with the edge ring surface 801 and the drilled ring surface 802, the edge ring surface 801 being the end face of the distal end of the branch pipe 8 of the three-way pipe after the opening treatment is completed, and the drilled ring surface 802 being the end face of the distal end of the branch pipe 8 that needs to be drilled after the main pipe material 7 is completed twice stamping. It should be noted that during the mutual adhesion of the distal end of the branch pipe 8 and the surface of the flattening block 501 to achieve secondary pressing, the stamping force of the distal end of the branch pipe 8 cannot affect the side wall of the branch pipe 8 due to the combined action of the stamping water and the side wall of the bottom hole 203 on the side wall of the branch pipe 8, thereby also unable to cause deformation of the side wall of the branch pipe 8; therefore, the stamping force of the distal end of the branch pipe 8 ultimately acts on the distal end of the branch pipe 8, based on which, in order to reduce the influence of the deformation of the edge ring surface 801 during the secondary stamping, the surface of the flattening block 501 is provided with a ring-shaped release groove 5012, the maximum inner diameter size of the release groove 5012 is equal to the inner diameter size of the branch pipe 8, and the depth of the release groove 5012 is greater than the maximum height difference of the distal end of the branch pipe 8; by providing the ring-shaped release groove 5012, since the size of the release groove 5012 projected on the distal end of the branch pipe 8 is located on the drilled ring surface 802, and the maximum inner diameter size of the release groove 5012 is equal to the inner diameter size of the branch pipe 8, when the edge ring surface 801 is pressed against the surface of the flattening block 501, the stamping stress generated by the edge ring surface 801 moves to the position of the drilled ring surface 802, ultimately causing the internal structure of the drilled ring surface 802 to deform; when the drilled ring surface 802 is pressed against the surface of the flattening block 501, the stamping stress generated by the drilled ring surface 802 moves to the position of the release groove 5012 projected on the surface of the flattening block 501, ultimately also causing the internal structure of the drilled ring surface 802 to deform; it is particularly noted that the deformation of the drilled ring surface 802 is ultimately located in the release groove 5012. In this way, the purpose of protecting the structure of the edge ring surface 801 is achieved.

[0032] It is worth mentioning that the structure of the edge ring surface 801 stated in the present scheme is to convert the edge ring surface 801 in the arc shape into the edge ring surface 801 in the plane during the secondary stamping, and the surface of the edge ring surface 801 will not cause further deformation of the internal structure of the edge ring surface 801 region, i.e., the position of the side wall of the branch pipe 8, when the deformation occurs.

[0033] According to the description of the above embodiment, after the main pipe material 7 is completed twice stamping, the far end of the branch pipe 8 after twice stamping can be directly opened by drilling, and the processing of the tee pipe is completed. However, it is worth noting that when the main pipe material 7 is completed twice stamping, the stamping water in the main pipe material 7 is in a high pressure state. When the stamping push rod 401 slides towards the outside of the main pipe material 7, the stamping water will surge due to the expansion of the space in the main pipe material 7. However, the internal space of the main pipe material 7 is still in a sealed state, which makes the stamping water form a "water hammer wave" and impact back and forth in the main pipe material 7, which is easy to induce fatigue cracks at the connection of the main pipe material 7 and the branch pipe 8, affecting the stamping quality of the tee pipe.

[0034] To solve this problem, the present scheme directly drills the far end face of the branch pipe 8. This arrangement has two advantages: first, it can complete the processing of the tee pipe at one time, without the need to take the tee pipe to other stations for opening treatment, which can save a lot of time and simplify the processing steps of the tee pipe; second, by opening the far end face of the branch pipe 8, the sealing state of the main pipe material 7 is released, and the stamping water in the main pipe material 7 can flow out through the opening of the branch pipe 8, and the stamping water will not trigger the "water hammer wave" phenomenon during the flowing process, thereby ensuring the stamping quality of the tee pipe.

[0035] Therefore, in order to directly open the far end face of the branch pipe 8 of the tee pipe after twice stamping, the present scheme needs to release the fitting relationship between the flattening block 501 and the far end face of the branch pipe 8 in advance. The flattening assembly 5 further comprises a flattening cylinder 503 and a lifting device 504, and the lower die 2 is further provided with a limiting slot hole communicating with the bottom hole 203. The flattening cylinder 503 and the lifting device 504 are arranged in the limiting slot hole. The flattening block 501 is connected with the output end of the flattening cylinder 503 to control the horizontal position of the flattening block 501, so as to realize the movement of the flattening block 501 from the position of the bottom hole 203 to the limiting slot hole. The output end of the lifting device 504 is connected with the flattening cylinder 503 to control the height position of the flattening block 501. By arranging the flattening cylinder 503 and the lifting device 504, the lifting device 504 starts to work first to control the flattening block 501 to release the fitting relationship with the far end face of the branch pipe 8. Then the flattening cylinder 503 starts to work to control the flattening block 501 to move from the position of the bottom hole 203 to the limiting slot hole.

[0036] Further, the scheme also includes a drilling device 6, which includes a drilling cylinder 601, a rotary motor 602 and a pyramid drill bit 603, the drilling cylinder 601 is arranged in the bottom hole 203, the rotary motor 602 is connected with the output end of the drilling cylinder 601, the output end of the rotary motor 602 is connected with the pyramid drill bit 603, the pyramid drill bit 603 is used for opening the distal end of the branch pipe 8 by rotating, the initial position of the pyramid drill bit 603 is located at the bottom of the flattening block 501, and the pyramid drill bit 603 is coaxially arranged in the bottom hole 203; by arranging the drilling device 6, after the flattening block 501 is contracted in the limiting groove hole, the rotary motor 602 starts to work to control the pyramid drill bit 603 to rotate; at the same time, the drilling cylinder 601 also starts to work to control the height of the pyramid drill bit 603, so that the pyramid drill bit 603 is used for opening the distal end face of the branch pipe 8.

[0037] It is worth mentioning that the drill bit of the scheme must be the pyramid drill bit 603, that is, the tapered drill bit; this is because the high-pressure punching water in the main pipe material 7 will directly overflow from the opening position at the moment when the drill bit opens the distal end face of the branch pipe 8, and in the process of overflowing, a huge impact force will be caused to the opening position and the surrounding structure of the opening position; therefore, if a drill bit with the same diameter as the inner wall of the branch pipe 8 is directly used to open the distal end face of the branch pipe 8, a huge impact will be caused to the side wall of the branch pipe 8, which affects the punching quality of the tee pipe; therefore, the pyramid drill bit 603 is used for opening in the scheme, a small opening is first made on the distal end of the branch pipe 8, and the diameter size of the opening is smaller than that of the drilling annular surface 802; in this way, even if the opening position and the surrounding of the opening position are impacted by the punching water, the impact of the punching water on the distal end face of the branch pipe 8 can be controlled within the range of the drilling annular surface 802, and a huge impact on the side wall of the branch pipe 8 is avoided.

[0038] It is worth mentioning that the scheme Figure 9 The wave pattern in the drawing shows the deformation position of the distal end face of the branch pipe 8 after the main pipe material 7 is punched twice; Figure 10 The drawing shows the deformation position of the edge annular surface 801 after the main pipe material 7 is punched twice.

[0039] In addition, it also needs to be explained that in the process of punching the branch pipe 8 twice, especially when the edge annular surface 801 is punched from the curved surface to the plane, the inner side wall surface of the branch pipe 8 will inevitably be slightly deformed, and another advantage of the pyramid drill bit 603 used in the scheme is that the inner side wall surface of the distal end of the branch pipe 8 can be directly rounded by the pyramid drill bit 603, so as to eliminate the slight deformation of the inner side wall surface of the branch pipe 8.

[0040] Further, in order to avoid the direct contact of the rotary motor 602 and the drilling cylinder 601 with the stamping water, the drilling device 6 further comprises an internally hollow drilling shell 604, the drilling cylinder 601 and the rotary motor 602 are arranged in the drilling shell 604, a protruding slot hole 6041 is coaxially arranged at the top of the drilling shell 604, the pagoda drill bit 603 is located outside the drilling shell 604, and the pagoda drill bit 603 is connected with the rotary motor 602 through the protruding slot hole 6041. By arranging the drilling shell 604, the direct contact of the rotary motor 602 and the drilling cylinder 601 with the stamping water can be avoided, and the rotary motor 602 and the drilling cylinder 601 are further damaged. It should be noted that the rotary motor 602 and the drilling cylinder 601 of the present scheme have certain waterproof performance. At the same time, in order to ensure the heat dissipation performance of the drilling shell 604, a heat dissipation slot hole is further arranged at the bottom of the drilling shell 604, the heat inside the drilling shell 604 can be directly transmitted to the external environment through the heat dissipation slot hole, and the normal heat dissipation of the rotary motor 602 and the drilling cylinder 601 is ensured.

[0041] As can be known from the above description of the embodiment, the pagoda drill bit 603 needs to be coaxially arranged in the bottom hole 203, so as to ensure that the end face of the branch pipe 8 is opened without damaging the side wall of the branch pipe 8; in order to ensure that the pagoda drill bit 603 is always coaxially arranged with the bottom hole 203, the cross-sectional shape of the drilling shell 604 is the same as that of the bottom hole 203, which makes the side wall of the drilling shell 604 and the side wall of the bottom hole 203 fit with each other, and when the drilling shell 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, and the deviation of the cooperation relationship between the pagoda drill bit 603 and the bottom hole 203 due to the installation error is avoided.

[0042] In addition, when the pagoda drill bit 603 opens the distal end of the branch pipe 8, iron filings may be left in the bottom hole 203, in order to collect the iron filings in the bottom hole 203 and facilitate centralized treatment, the top of the drilling shell 604 is arranged to be inclined, the lower mold 2 further comprises a collecting groove 202, the collecting groove 202 and the bottom hole 203 are in communication, and the collecting groove 202 is located at the lowest part of the inclined end of the top of the drilling shell 604; by arranging the collecting groove 202, when the pagoda drill bit 603 opens the distal end of the branch pipe 8, the remaining iron filings will fall on the surface of the top of the drilling shell 604, and then fall into the collecting groove 202, so as to collect the iron filings remaining in the bottom hole 203 and ensure the normal operation of the device.

[0043] It should be noted that when the pyramid drill 603 is processing the distal end face of the branch pipe 8, the hydraulic unit is restarted to inject the punching water into the main pipe material 7, and the punching water in the main pipe material 7 flows into the bottom hole 203 through the branch pipe 8. The bottom hole 203 is provided with a groove hole for discharging the punching water, so the punching water will not accumulate in the bottom hole 203, and the iron filings adhered to the side wall of the bottom hole 203 will eventually fall into the collecting groove 202 due to the punching water.

[0044] The above is only a preferred embodiment of the present application, and does not limit the present application in any form. Although the present application has been disclosed as above with a preferred embodiment, it is not intended to limit the present application. Any person skilled in the art can make some changes or modifications to the above disclosed technical content to obtain equivalent embodiments with equivalent changes, without departing from the technical solution of the present application. Any modification, change, and modification of the above embodiments, which does not depart from the technical solution of the present application, are still within the scope of the technical solution of the present application.

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 is towards the main pipe material and injects the stamping water, 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, make the side wall of main pipe material stamp out the branch pipe which is tangent to the surface of the flattening block, the far end bottom surface of the branch pipe after primary stamping is a circular 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 far end surface of the branch pipe after secondary stamping is a plane, then the far end of the branch pipe after secondary stamping can be directly opened by drilling, and the processing of the three-way pipe is completed.

2. The tee pipe machining tooling fixture of claim 1, wherein: The stamping device also includes a fitting rod coaxially connected to the proximal end of the stamping push rod, 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 two ends of the hydraulic pipe are respectively connected to a water source and the stamping hole, and the hydraulic pump is connected to the hydraulic pipe for pumping the stamping water into the main pipe material.

4. The tee pipe machining tooling fixture of claim 2, wherein: The flattening assembly also includes a pressure sensor, the surface of the flattening block is coaxially provided with a flattening slot, the pressure sensor is coaxially embedded in the flattening slot, and the pressure sensor is used to determine whether the far end of the branch pipe is in close contact with the flattening block during primary stamping.

5. The tee pipe machining tooling fixture of claim 4, wherein: The hydraulic unit also 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.

6. 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 far end surface of the branch pipe.

7. The tee pipe machining tooling fixture of claim 1, wherein: The flattening assembly also 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 to 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 to the flattening cylinder to control the height position of the flattening block.

8. 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.

9. The tee pipe machining tooling fixture of claim 8, 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.

10. The tee pipe machining tooling fixture of claim 9, 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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