A cold heading die for high pressure oil pipe head

Abstract

The present invention relates to the technical field of oil circuit connector processing, specifically to a cold heading forming die for a high-pressure oil pipe head, comprising a bracket, a left die, a right die and a controller, the controller being used to control the operation of the cold heading forming die, and characterized in that: the bracket comprises a bottom plate, a right side plate and a left side plate are fixedly mounted on the bottom plate, a cross beam for reinforcement is mounted between the right side plate and the left side plate, the number of the right die is multiple, and the multiple right die are mounted on the right side plate in an "I" shape, and the upset workpiece can be quickly separated from the lower module and the upper module through the cooperation between the hinged rod and the No. 2 hydraulic telescopic rod, and the blank round tube can also be quickly clamped, thereby reducing the time for installing and removing the blank round tube and improving the production speed; by replacing the longitudinal gantry structure with a transverse cross-up structure, it is more convenient for loading and unloading materials to enter and exit the long oil pipe of the upsetting head transversely.

Description

Technical Field

[0001] The invention relates to the technical field of oil circuit connector processing, in particular to a cold heading forming die for a high-pressure oil pipe head. Background Art

[0002] High-pressure oil pipe joints are commonly used connecting components in the oil circuits of marine diesel engines and other mechanical equipment. Figure 1 , which includes a head 21 at the front end, a cylindrical part 22 connected to the rear end of the head 21, a circular tube part 24 at the rear end, and a transition part 23 connected between the circular tube part 24 and the cylindrical part 22. The center of the high-pressure oil pipe joint is provided with an axially penetrating central tube hole. The head 21 is in the shape of a truncated cone, with a small head diameter of 7mm, a large head diameter of 16mm, and a cone vertex angle of 44°; the diameter of the cylindrical part 22 is the same as the large head diameter of the head, which is 16mm, and the total height of the cylindrical part 22 and the head 21 is 11mm; the outer diameter of the circular tube part 24 is 10mm.

[0003] There is also a patent in the prior art about a cold heading forming die for a high-pressure oil pipe head. For example, a Chinese patent with application number 2015105712331 discloses a cold heading forming method for a high-pressure oil pipe joint, wherein the high-pressure oil pipe joint comprises a head at the front end, a cylindrical portion connected to the rear end of the head, and a circular tube portion at the rear end. The head is in the shape of a truncated cone, with a small head diameter of 7 mm, a large head diameter of 16 mm, a cone vertex angle of 44°, a diameter of the cylindrical portion being the same as a large head diameter of the head, a total height of the cylindrical portion and the head being 11 mm, and an outer diameter of the circular tube portion being 10 mm. The invention is characterized in that five special cold heading dies are used on a multi-station cold heading machine to perform five upsetting forgings on the blank circular tube in sequence, so that the blank circular tube is deformed and formed into a finished high-pressure oil pipe joint product one by one.

[0004] A cold forging forming method of a high-pressure oil pipe joint described in the prior art solution can process a rough round pipe into a high-pressure oil pipe head-shaped connector by cold forging, but the solution has the following disadvantages:

[0005] 1. Fix the blank round tube by a clamp, which is composed of two modules of the same shape. The two modules are closely matched by multiple pins and pin holes. The installation and removal of the two modules are time-consuming and laborious, which increases the time for installing and removing the blank round tube and reduces the production speed.

[0006] 2. The existing cold heading mold has insufficient protective components during molding, which can easily cause vibration damage to the mold after long-term use, and needs further improvement. Summary of the invention

[0007] The object of the present invention is to provide a cold heading forming die for a high-pressure oil pipe head mold to solve the problems raised in the above background technology.

[0008] To achieve the above object, the present invention provides the following technical solutions:

[0009] The cold heading forming die for a high-pressure oil pipe head according to the present invention comprises a bracket, a left die, a right die and a controller, wherein the controller is used to control the operation of the cold heading forming die, wherein the bracket comprises a bottom plate, wherein a right side plate and a left side plate are fixedly mounted on the bottom plate, wherein a cross beam for reinforcement is installed between the right side plate and the left side plate, wherein the number of the right die is multiple, wherein the multiple right die are installed on the right side plate in a "one" shape, wherein the left die is located on the left side of the right die, wherein the left die is used to clamp a rough round tube, wherein the left die is also provided with a No. 1 hydraulic telescopic rod, wherein the No. 1 hydraulic telescopic rod is used for the left die For the mold closing between the right molds, the No. 1 hydraulic telescopic rod is slidably installed in the strip through hole opened in the left plate through a slider. The No. 1 hydraulic telescopic rod is connected to a driving device, and the driving device is used to drive the left mold to move on the left side of multiple right molds; the left mold clamps the blank round tube, and the driving device drives the left mold to move to the left side of the right mold. The No. 1 hydraulic telescopic rod pushes the left mold to move closer to the right mold and close the mold for upsetting. After the upsetting is completed, with the cooperation of the driving device and the No. 1 hydraulic telescopic rod, the left mold and the other right mold are closed and upset, so that the blank round tube is formed into a workpiece of the expected shape after multiple mold closing and upsetting.

[0010] Preferably, the left mold includes a lower module, an upper module, an articulated rod and a No. 2 hydraulic telescopic rod. The lower module and the upper module have the same shape and are symmetrical to each other. The lower module and the upper module are matched to form a clamping hole, and the diameter of the clamping hole matches the outer diameter of the blank round tube. The sides of the lower module and the upper module that are close to each other are hinged with one end of the articulated rod, and the other ends of the articulated rods are hinged to the right side of the same No. 1 hydraulic telescopic rod; the sides of the lower module and the upper module that are away from each other are hinged with one end of the No. 2 hydraulic telescopic rod, and the other ends of the No. 2 hydraulic telescopic rods are respectively hinged It is connected to both sides of the No. 1 hydraulic telescopic rod. When the No. 2 hydraulic telescopic rod is contracted, the lower module and the upper module are moved upward and away from each other through the cooperation of the hinged rod, so that the lower module and the upper module are separated. At this time, the upset workpiece can be quickly separated from the lower module and the upper module. When installing the blank round tube, it is only necessary to place the blank round tube room between the lower module and the upper module, extend the No. 2 hydraulic telescopic rod, so that the lower module and the upper module are closed, so as to quickly clamp the blank round tube, thereby reducing the time for installing and removing the blank round tube and improving the production speed.

[0011] Preferably, the right mold includes a right mold shell, a support seat, a shock-absorbing spring, a die and a mold core; the die is fixedly installed inside the right mold shell, the support seat is fixedly installed on the right side plate, the right mold shell is slidably connected to the support seat, a mold core is slidably penetrated on the support seat, the diameter of the mold core matches the inner diameter of the blank round tube, and the mold core is penetrated at the center of the die; the shock-absorbing spring is connected between the support seat and the die; the shock-absorbing spring is used to form a certain buffer protection to prevent damage caused by rapid impact and extrusion, while further supporting the pressure to extend its service life.

[0012] Preferably, the driving device includes a servo motor, a screw and a mounting block, the servo motor is fixedly mounted on the left side plate, the output shaft of the servo motor is connected to the screw via a coupling, the screw thread passes through the mounting block, and the mounting block is fixedly connected to the No. 1 hydraulic telescopic rod.

[0013] Preferably, the lower module and the upper module are both composed of a module shell and an inner mold body, a T-shaped positioning rod is provided on the side of the inner mold body close to the module shell, and a T-shaped slot corresponding to the T-shaped positioning rod is provided on the side of the module shell close to the inner mold body, a positioning block is fixedly installed on the inner mold body, a positioning groove corresponding to the positioning block is provided on the module shell, a threaded hole is provided on the positioning block, and the positioning block and the positioning groove are connected by bolts; by unscrewing the bolts, the inner mold body can be removed from the module shell to facilitate replacement of inner mold bodies with different inner diameters, thereby being suitable for clamping blank round tubes with different outer diameters.

[0014] Preferably, a buffer pad is provided inside the right mold, and the buffer pad is connected to the left side of the shock-absorbing spring. A buffer pad is provided, and a shock-absorbing spring is connected to the right side of the buffer pad to form a certain buffer protection for the right mold to prevent damage caused by rapid impact and extrusion, while further supporting the pressure to extend its service life.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] 1. The cold forging forming die for high-pressure oil pipe head of the present invention can quickly separate the forged workpiece from the lower module and the upper module through the cooperation between the hinge rod and the No. 2 hydraulic telescopic rod, and can also quickly clamp the blank round tube, thereby reducing the time for installing and removing the blank round tube and improving the production speed; by replacing the longitudinal gantry structure with a transverse horizontal forging structure, it is more convenient for loading and unloading the long oil pipe with the forged head to enter and exit horizontally.

[0017] 2. The cold heading forming die for the high-pressure oil pipe head described in the present invention provides a buffer pad and connects a shock-absorbing spring to the right side of the buffer pad to form a certain buffer protection for the right die to prevent damage caused by rapid impact and extrusion, while further supporting the pressure and extending its service life.

[0018] 3. The cold heading forming die for high-pressure oil pipe head described in the present invention can remove the inner die body from the module housing by unscrewing the bolts, so as to facilitate the replacement of the inner die body with different inner diameters, and is thus suitable for clamping blank round tubes with different outer diameters. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the structure of the present invention;

[0020] Figure 2 for Figure 1 A partial enlarged view of point A in the middle.

[0021] In the figure: bracket 1, right side plate 11, cross beam 12, left side plate 13, left mold 2, lower module 21, module shell 211, inner mold body 212, T-shaped positioning rod 213, T-shaped slot 214, positioning block 215, upper module 22, hinged rod 23, No. 2 hydraulic telescopic rod 24, right mold 3, right mold shell 31, support seat 32, shock absorbing spring 33, die 34, core 35, buffer pad 36, drive device 4, servo motor 41, screw 42, mounting block 43, No. 1 hydraulic telescopic rod 5. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0023] See also Figure 1-2 , the present invention provides a technical solution:

[0024] A cold heading forming die for a high-pressure oil pipe head according to the present invention comprises a bracket 1, a left die 2, a right die 3 and a controller, wherein the controller is used to control the operation of the cold heading forming die, wherein the bracket 1 comprises a bottom plate, wherein a right side plate 11 and a left side plate 13 are fixedly mounted on the bottom plate, wherein a cross beam 12 for reinforcement is mounted between the right side plate 11 and the left side plate 13, wherein the number of the right die 3 is multiple, wherein the multiple right die 3 are mounted on the right side plate 11 in a "one" shape, wherein the left die 2 is located on the left side of the right die 3, The left mold 2 is used for clamping the blank round tube. The left mold 2 is also provided with a No. 1 hydraulic telescopic rod 5, which is used for closing the left mold 2 with the right mold 3. The No. 1 hydraulic telescopic rod 5 is slidably installed in the strip through hole opened in the left side plate 13 through a slider. The No. 1 hydraulic telescopic rod 5 is connected to a driving device 4, and the driving device 4 is used to drive the left mold 2 to move on the left side of multiple right molds 3; the left mold 2 clamps the blank round tube, and the driving device 4 drives the left mold 2 to move to the left side of the right mold 3. The No. 1 hydraulic telescopic rod 5 pushes the left mold 2 to move closer to the right mold 3 and close the mold for upsetting. After the upsetting is completed, with the cooperation of the driving device 4 and the No. 1 hydraulic telescopic rod 5, the left mold 2 and the other right mold 3 are closed and pressed, so that the blank round tube is formed into a workpiece of the desired shape after multiple closing and upsetting.

[0025] As an embodiment of the present invention, the left mold 2 includes a lower module 21, an upper module 22, a hinged rod 23 and a second hydraulic telescopic rod 24. The lower module 21 and the upper module 22 have the same shape and are symmetrical to each other. The lower module 21 and the upper module 22 are combined to form a clamping hole, and the diameter of the clamping hole matches the outer diameter of the blank round tube. The lower module 21 and the upper module 22 are both hinged on one end of the hinged rod 23 on one side close to each other, and the other end of the hinged rod 23 is hinged on the right side of the same number one hydraulic telescopic rod 5; the lower module 21 The side surface away from the upper module 22 is hinged with one end of the No. 2 hydraulic telescopic rod 24, and the other end of the No. 2 hydraulic telescopic rod 24 is hinged on both sides of the No. 1 hydraulic telescopic rod 5. When the No. 2 hydraulic telescopic rod 24 contracts, the lower module 21 and the upper module 22 are moved upward and away from each other through the cooperation of the hinged rod 23, so that the lower module 21 and the upper module 22 are separated. At this time, the upset workpiece can be quickly separated from the lower module 21 and the upper module 22. When installing the blank round tube, it is only necessary to place the blank round tube room between the lower module 21 and the upper module 22, and extend the No. 2 hydraulic telescopic rod 24 to close the lower module 21 and the upper module 22, so as to quickly clamp the blank round tube, thereby reducing the time for installing and removing the blank round tube and improving the production speed.

[0026] As an embodiment of the present invention, the right mold 3 includes a right mold shell 31, a support seat 32, a shock-absorbing spring 33, a die 34 and a core 35; the die 34 is fixedly installed inside the right mold shell 31, the support seat 32 is fixedly installed on the right side plate 11, the right mold shell 31 is slidably connected to the support seat 32, and a core 35 is slidably penetrated on the support seat 32, the diameter of the core 35 matches the inner diameter of the blank round tube, and the core 35 is penetrated at the center of the die 34; the shock-absorbing spring 33 is connected between the support seat 32 and the die 34; the shock-absorbing spring 33 is used to form a certain buffer protection to prevent damage caused by rapid impact and extrusion, while further supporting the pressure to extend its service life.

[0027] As an embodiment of the present invention, the driving device 4 includes a servo motor 41, a screw 42 and a mounting block 43. The servo motor 41 is fixedly mounted on the left side plate 13. The output shaft of the servo motor 41 is connected to the screw 42 through a coupling. The screw 42 is threaded through the mounting block 43. The mounting block 43 is fixedly connected to the No. 1 hydraulic telescopic rod 5.

[0028] As an embodiment of the present invention, the lower module 21 and the upper module 22 are both composed of a module shell 211 and an inner mold body 212, a T-shaped positioning rod 213 is provided on the side of the inner mold body 212 close to the module shell 211, and a T-shaped slot 214 corresponding to the T-shaped positioning rod 213 is provided on the side of the module shell 211 close to the inner mold body 212, a positioning block 215 is fixedly installed on the inner mold body 212, a positioning groove corresponding to the positioning block 215 is provided on the module shell 211, a threaded hole is provided on the positioning block 215, and the positioning block 215 is connected to the positioning groove by bolts; by unscrewing the bolts, the inner mold body 212 is removed from the module shell 211 to facilitate the replacement of the inner mold body 212 with different inner diameters, so as to be suitable for clamping blank round tubes with different outer diameters.

[0029] As an embodiment of the present invention, a buffer pad 36 is provided inside the right mold 3, and the buffer pad 36 is connected to the left side of the shock-absorbing spring 33. The buffer pad 36 is provided, and the shock-absorbing spring 33 is connected to the right side of the buffer pad 36, so as to form a certain buffer protection for the right mold 3 to prevent damage caused by rapid impact and extrusion, and at the same time further support the pressure to extend its service life.

[0030] Working principle: When the No. 2 hydraulic telescopic rod 24 is retracted, the lower module 21 and the upper module 22 are moved upward and away from each other through the cooperation of the hinge rod 23, so that the lower module 21 and the upper module 22 are separated. At this time, the upset workpiece can be quickly separated from the lower module 21 and the upper module 22. When installing the blank round tube, it is only necessary to place the blank round tube room between the lower module 21 and the upper module 22, and extend the No. 2 hydraulic telescopic rod 24 to close the lower module 21 and the upper module 22, so as to quickly clamp the blank round tube, thereby reducing the time for installing and removing the blank round tube and improving production efficiency. The left mold 2 clamps the blank round tube, and the driving device 4 drives the left mold 2 to move above the right mold 3. The No. 1 hydraulic telescopic rod 5 pushes the left mold 2 to move closer to the right mold 3 and the molds are closed and pressed. After the pressing is completed, with the cooperation of the driving device 4 and the No. 1 hydraulic telescopic rod 5, the left mold 2 and the other right mold 3 are closed and pressed, so that the blank round tube is formed into a workpiece of the desired shape after multiple closing and pressing. By unscrewing the bolts, the inner mold body 212 is removed from the module shell 211 to facilitate the replacement of the inner mold body 212 with different inner diameters, which is suitable for clamping blank round tubes with different outer diameters.

[0031] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A cold forging die for a high-pressure oil pipe head, comprising a support (1), a left die (2), a right die (3) and a control The controller is used to control the operation of the cold heading forming die, and its characteristics are: The support (1) comprises a bottom plate, on which a right side plate (11) and a left side plate (13) are fixedly mounted, a crossbeam (12) for reinforcement is mounted between the right side plate (11) and the left side plate (13), the number of the right molds (3) is multiple, and the multiple right molds (3) are mounted on the right side plate (11) in a "one" shape, the left mold (2) is located on the left side of the right mold (3), the left mold (2) is used for clamping the blank round tube, the left mold (2) is also provided with a No. 1 hydraulic telescopic rod (5), the No. 1 hydraulic telescopic rod (5) is used for mold closing between the left mold (2) and the right mold (3), the No. 1 hydraulic telescopic rod (5) is slidably mounted in a strip-shaped through hole provided in the left side plate (13) through a slider, the No. 1 hydraulic telescopic rod (5) is connected to a driving device (4), and the driving device (4) is used to drive the left mold (2) to move on the left side of the multiple right molds (3); The left mold (2) comprises a lower module (21), an upper module (22), an articulated rod (23) and a second hydraulic telescopic rod (24); the lower module (21) and the upper module (22) are of the same shape and symmetrical to each other; the lower module (21) and the upper module (22) are matched to form a clamping hole; one end of the articulated rod (23) is hinged to the side where the lower module (21) and the upper module (22) are close to each other, and the other end of the articulated rod (23) is hinged to the right side of the same first hydraulic telescopic rod (5); one end of the second hydraulic telescopic rod (24) is hinged to the side where the lower module (21) and the upper module (22) are away from each other, and the other end of the second hydraulic telescopic rod (24) is respectively hinged to the two sides of the first hydraulic telescopic rod (5); The right mold (3) comprises a right mold shell (31), a support seat (32), a shock-absorbing spring (33), a die (34) and a mold core (35); the die (34) is fixedly installed inside the right mold shell (31); the support seat (32) is fixedly installed on the right side plate (11); the right mold shell (31) is slidably connected to the support seat (32); a mold core (35) is slidably penetrated on the support seat (32); the mold core (35) is penetrated and arranged at the center position of the die (34); the shock-absorbing spring (33) is connected between the support seat (32) and the die (34).

2. The cold heading forming die for high pressure oil pipe head according to claim 1, characterized in that: The driving device (4) comprises a servo motor (41), a screw rod (42) and a mounting block (43); the servo motor (41) is fixedly mounted on the left side plate (13); the output shaft of the servo motor (41) is connected to the screw rod (42) via a coupling; the screw rod (42) is threadedly penetrated on the mounting block (43); and the mounting block (43) is fixedly connected to the first hydraulic telescopic rod (5).

3. The cold heading forming die for high pressure oil pipe head according to claim 1, characterized in that: The lower module (21) and the upper module (22) are both composed of a module shell (211) and an inner mold body (212); a T-shaped positioning rod (213) is provided on a side of the inner mold body (212) close to the module shell (211); and a T-shaped slot (214) corresponding to the T-shaped positioning rod (213) is provided on a side of the module shell (211) close to the inner mold body (212); a positioning block (215) is fixedly mounted on the inner mold body (212); a positioning groove corresponding to the positioning block (215) is provided on the module shell (211); a threaded hole is provided on the positioning block (215); and the positioning block (215) and the positioning groove are connected by bolts.

4. The cold heading forming die for high pressure oil pipe head according to claim 1, characterized in that: A buffer pad (36) is arranged inside the right mold (3), and the buffer pad (36) is connected to the left side of the shock absorbing spring (33).

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