Press-fit forming machine of self-closing valve body

Abstract

The utility model relates to a press-fit forming machine of a self-closing valve body, which comprises a machine frame, a hydraulic pump assembly is arranged on the machine frame, the machine frame is formed by welding square steel tubes, a four-column frame structure is arranged above the machine frame, a vertical press-fit structure assembly is arranged on an installation top plate of the four-column frame structure, and the vertical press-fit structure assembly is connected with the hydraulic pump assembly. The vertical press-fit structure assembly comprises a vertical press-fit oil cylinder and a vertical press-fit movable mold arranged at the front end of the vertical press-fit oil cylinder, a self-resetting positioning unit is fixed in the vertical press-fit movable mold, and a vertical bearing fixed mold matched with the vertical press-fit movable mold is arranged on an installation bottom plate of the four-column frame structure. According to the press-fit forming machine of the self-closing valve body, a traditional air cylinder press-fit mode is changed into an oil cylinder press-fit mode, meanwhile, the press-fit process is decomposed and optimized, the press-fit efficiency is improved, the press-fit efficiency is improved, and the press-fit forming machine of the self-closing valve body is improved. The stability of the steel hoop blank in the pressing deformation process is improved, and the sealing performance of the self-closing valve body is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of an integrated forming machine for tightly pressing a steel hoop blank sleeved on the outer side of a self-closing valve body, and specifically relates to a pressing forming machine for a self-closing valve body. Background Art

[0002] The known prior art pressing and forming machines mostly use compressed air to drive the cylinder to provide power for pressing the steel hoop blank. Since the air compression is relatively large and there is a long distance between the general air source delivery pipeline and the equipment, the pressure loss is large. Therefore, when the cylinder is used to press the steel hoop blank sleeved on the outer side of the self-closing valve body, the pressing quality is difficult to ensure consistency, and the pressing quality of the steel hoop blank is directly related to the overall sealing effect of the self-closing valve body. At the same time, although some known equipment also uses a hydraulic pump station to output hydraulic oil to drive the oil The cylinder provides a power source for the pressing action, but most of the time, the steel hoop blank sleeved on the outside of the self-closing valve body is pressed and formed once, and the forming port of the mold is mainly used to complete the action from inward closing to final pressing and forming. During the pressing process, the steel hoop blank is subjected to a large vertical force, and a bulge will be generated on the outer edge of the self-closing valve body during the pressing process. Not only does it affect the appearance, but also after the pressing is completed, the steel hoop blank can continue to rotate, thereby affecting the sealing effect of the self-closing valve body, and further affecting the user's safety. Utility Model Content

[0003] The technical problem to be solved by the utility model is: to overcome the shortcomings of the prior art and provide a device that outputs hydraulic oil from a hydraulic pump component and then drives the oil cylinder to provide a power source for a device that can perform step-by-step pressing of the steel hoop blank sleeved on the outside of the valve body. First, the steel hoop blank sleeved on the outside of the self-closing valve body is pre-pressed by a horizontal pre-pressing structural component. Through the pre-pressing action, a certain amount of elastic deformation of the steel hoop blank can be achieved during the pre-pressing process. Then, the steel hoop blank is finally pressed into place by a vertical pressing structural component.

[0004] The technical solution adopted by the utility model is: a self-closing valve body pressing and forming machine, which includes a frame, the frame is welded by square steel pipes, a hydraulic pump assembly is arranged inside the frame, a four-column frame structure is arranged above the frame, the four-column frame structure includes a mounting base plate, columns and a mounting top plate, wherein: a horizontal pre-pressing structure assembly is fixedly mounted on the mounting base plate, the horizontal pre-pressing structure assembly is two groups of pre-pressing units symmetrically arranged on both sides of the mounting base plate, the pre-pressing unit includes a bracket, a horizontal hydraulic cylinder, the front end of the horizontal hydraulic cylinder is connected to a connecting block through a T-shaped shaft, and the connecting block is connected to the horizontal hydraulic cylinder. A rectangular hole is opened in the center of the block, and the tail of the pre-pressed meniscus is fixed in the rectangular hole of the connecting block by a square head set screw. An adjusting gasket is arranged below the tail of the pre-pressed meniscus, and a vertical pressing structure component is installed and fixed on the mounting top plate. The vertical pressing structure component includes a vertical pressing cylinder, a vertical pressing movable mold, and a vertical bearing fixed mold, wherein a self-resetting positioning unit is arranged inside the vertical pressing movable mold, the vertical pressing cylinder includes a forward oil port and a return oil port, and a stroke adjustment unit is arranged at the tail of the vertical piston rod of the vertical pressing cylinder, and the stroke adjustment unit includes an adjusting internal thread rotating part.

[0005] The beneficial effects of the utility model are as follows: the utility model changes the traditional compressed air to provide the pressing power by using a hydraulic pump assembly. Since the working medium provided by the hydraulic pump assembly to the oil cylinder is hydraulic oil, it has stronger power and more stable pressing force than compressed air. Therefore, it can better guarantee the pressing quality of the steel hoop blank sleeved on the outside of the self-closing valve body, so as to ensure a better sealing effect of the self-closing valve body finished product. At the same time, the setting of the horizontal pre-pressing structural assembly can more effectively guarantee the pressing effect, and improve the appearance uniformity and overall sealing performance of the steel ring after pressing. BRIEF DESCRIPTION OF THE DRAWINGS

[0006] Figure 1 This is the front view of the self-closing valve body pressing and forming machine.

[0007] Figure 2 yes Figure 1 Left view of the molding machine main view.

[0008] Figure 3 yes Figure 2 AA section view of the left view.

[0009] Figure 4 yes Figure 2 BB section view of the left view.

[0010] Figure 5 yes Figure 2 CC section view of the left view.

[0011] In the figure: 1, frame; 2, hydraulic pump assembly; 3, mounting base; 4, column; 5, mounting top plate; 6, column pressure plate; 7, bracket; 8, horizontal hydraulic cylinder; 9, T-axis; 10, connecting block; 11, pre-pressed meniscus; 12, square head set screw; 13, adjusting gasket; 14, forward oil port; 15, reverse oil port; 16, parallel piston rod; 17, threaded connecting rod; 18, internal thread positioning sleeve; 19, horizontal positioning nut; 20, vertical pressure 1. Clamping cylinder; 21. Vertical pressing movable mold; 22. Vertical load-bearing fixed mold; 23. Process oil port; 24. Return oil port; 25. Vertical piston rod; 26. Adjustment internal thread rotating part; 27. Fixed ring block; 28. Center shaft; 29. ​​Sliding ring block; 30. Guide pin; 31. Elastic element; 32. Guide rod; 33. Transverse plate; 34. Self-lubricating bearing; 35. Bearing pressure ring; 36. Fixed connecting cylinder; 37. Center shaft anti-rotation disc; 38. Forming pressing mold. DETAILED DESCRIPTION

[0012] The present invention will be described in detail below with reference to the accompanying drawings in the embodiments of the present invention:

[0013] like Figure 1As shown: a self-closing valve body pressing and forming machine, it includes a frame 1, the frame 1 is a rectangular parallelepiped frame formed by welding square steel pipes, a hydraulic pump assembly 2 is fixedly arranged on the crossbeam of the frame 1, a four-column frame structure is fixedly arranged above the frame 1, the four-column frame structure includes a mounting base plate 3, four columns 4 and a mounting top plate 5, wherein: a horizontal pre-pressing structure assembly is fixedly installed on the mounting base plate 3 through a bracket 7, the horizontal pre-pressing structure assembly includes a horizontal hydraulic cylinder 8, the horizontal hydraulic cylinder 8 includes a forward oil port 14 and a backward oil port 15, the moving part of the horizontal hydraulic cylinder 8 is a translation piston rod 16, a vertical pressing structure assembly is fixedly arranged on the mounting top plate 5 through screws, and the vertical The straight pressing structure assembly includes a vertical pressing cylinder 20, which includes a forward oil port 23 and a return oil port 24. The moving part of the vertical pressing cylinder 20 is a vertical piston rod 25, and a stroke adjustment unit is arranged at the tail of the vertical piston rod 25. The hydraulic pump assembly 2 mainly includes a motor, an oil pump, a direction control solenoid valve and its electrical control system. The hydraulic pump assembly 2 provides hydraulic oil as a power source for the horizontal hydraulic cylinder 8 and the vertical pressing cylinder 20 through an oil pipe; when the hydraulic oil enters the forward oil port 14 of the horizontal hydraulic cylinder 8, the translational piston rod 16 of the horizontal hydraulic cylinder 8 extends forward, and the pre-pressed meniscus 11 is used to complete the sleeve of the steel ring on the self-closing valve body Pre-pressing operation, when the hydraulic oil enters the retreat oil port 15 of the horizontal hydraulic cylinder 8, the translation piston rod 16 of the horizontal hydraulic cylinder 8 withdraws backward, thereby driving the pre-pressed meniscus 11 to complete the retreat action, and providing a pressing space for the final pressing of the vertical pressing movable mold 21 driven by the vertical pressing cylinder 20; when the hydraulic oil enters the advance oil port 23 of the vertical pressing cylinder 20, the vertical piston rod 25 of the vertical pressing cylinder 20 extends forward, thereby driving the vertical pressing movable mold 21 to achieve the final pressing action, and when the hydraulic oil enters the return oil port 24 of the vertical pressing cylinder 20, the vertical piston rod 25 of the vertical pressing cylinder 20 withdraws backward to place the self-closing valve body to be pressed and the outer sleeve The placement of the steel hoop blank reserves an operating space; the tail of the translation piston rod 16 of the horizontal hydraulic cylinder 8 is provided with an internal thread that matches the threaded connecting rod 17, and the internal thread positioning sleeve 18 is also provided with an internal thread that matches the threaded connecting rod 17. First, the external thread at the other end of the threaded connecting rod 17 is screwed into the tail of the translation piston rod 16 through the square head at one end of the threaded connecting rod 17, and screwed in to the maximum depth, and then the internal thread positioning sleeve 18 is screwed into a certain depth from the other side of the threaded connecting rod 17, and the horizontal positioning nut 19 is used to lock the position of the internal thread positioning sleeve 18, so as to mechanically prevent the pre-pressed meniscus 11 from moving forward excessively and damaging the self-closing valve to be pressed;The tail of the vertical piston rod 25 of the vertical pressing oil cylinder 20 is provided with a stroke adjustment unit, which includes an adjustment internal thread rotating member 26 and a fastening nut. The specific structure of the stroke adjustment unit is described as follows: the external thread provided at the tail of the vertical piston rod 25 matches the internal thread provided on the adjustment internal thread rotating member 26, and the position of the adjustment internal thread rotating member 26 is locked by a nut. The stroke adjustment unit is an adjustment structure with similar functions to the tail of the horizontal hydraulic oil cylinder 8. Its main function is to prevent the vertical pressing movable mold 21 from damaging the self-closing valve to be pressed due to excessive movement during the downward process, which will not be described in detail here. ;

[0014] like Figure 2 As shown: the four-column frame structure includes four columns 4, each of which has a step at the lower end, an external thread at the smaller step axis, a step and an internal thread hole at the upper end, and stepped holes corresponding to the columns 4 are respectively arranged at the four corners of the mounting base plate 3 and the mounting top plate 5. The large hole of the stepped hole on the mounting base plate 3 is the same size as the outer diameter of the column, and the small hole of the stepped hole is provided with an internal thread matching the external thread at the lower end of the column 4. The four columns 4 are respectively screwed into the internal thread of the mounting base plate 3. The large hole of the stepped hole ensures that the column 4 remains vertical to the mounting base plate after installation without skewing. 5 is also provided with a stepped hole, in which the large hole section is at the bottom. After the step arranged on the upper end of the column 4 passes through the mounting top plate 5, a certain distance is reserved between the upper end surface of the column 4 and the upper plane of the mounting top plate 5. The column pressing plate 6 is placed on the upper plane of the mounting top plate 5 and kept coaxial with the column 4. A screw is passed through the column pressing plate 6 and then screwed into the internal threaded hole at the upper end of the column 4. The mounting top plate 5 and the column 4 are fixed by the tensile stress generated by screwing the screw in. The arrangement of the stepped holes on the mounting bottom plate 3 and the mounting top plate 5 can more effectively ensure that the mounting bottom plate 3 and the mounting top plate 5 remain parallel and the central axis will not deviate.

[0015] like Figure 3As shown: at the center of the mounting base plate 3, a vertical bearing fixed die 22 is fixed by screws. The vertical bearing fixed die 22 is a cylindrical structure with a step groove arranged thereon. The self-closing valve body to be pressed together with the steel hoop blank sleeved on its outer side can be placed on the step groove. Rectangular through holes are arranged on both sides of the vertical bearing fixed die 22. The rectangular through holes are the same size as the pre-pressed meniscus 11. The pre-pressed meniscus 11 can reciprocate in the rectangular through holes, thereby completing the steel hoop sleeved on the outer side of the self-closing valve body. The front end of the pre-pressed meniscus 11 is in a half-moon shape, and its size is slightly larger than the steel ring set on the self-closing valve body. The tail of the pre-pressed meniscus 11 is rectangular. The tail of the pre-pressed meniscus 11 is inserted into the prefabricated rectangular hole on the connecting block 10, and the upper part is fixed with a square head set screw 12. An adjusting gasket 13 is also provided under the tail of the pre-pressed meniscus 11. The adjusting gaskets of different thicknesses can be replaced to adjust the pre-pressed meniscus 11 to keep it level, so that Ensure that the pre-pressed meniscus 11 can freely reciprocate and translate in the rectangular through holes set on both sides of the vertical load-bearing fixed mold 22; the tail of the connecting block 10 is provided with a stepped U-shaped groove, and one end of the T-shaped shaft 9 is provided with a stage larger than the T-shaped shaft 9. The larger stage of the T-shaped shaft 9 can be placed in the stepped U-shaped groove set at the tail of the connecting block 10 to achieve a hard connection setting. The other end of the T-shaped shaft 9 is provided with an external thread, and the external thread end is screwed into the internal thread set at the front end of the translation piston rod 16 of the horizontal hydraulic cylinder 8, and a nut is used to tighten The horizontal hydraulic cylinder 8 is locked, thereby realizing the conversion of the movement of the translational piston rod of the horizontal hydraulic cylinder 8 into the advance and retreat of the pre-pressed meniscus 11, completing the pre-pressing action of the steel hoop blank sleeved on the outside of the self-closing valve body, and withdrawing after completing the pre-pressing action. A mounting hole is arranged on the front end face of the horizontal hydraulic cylinder 8, and a corresponding through hole is arranged on the vertical mounting face of the bracket 7. The bracket 7 and the horizontal hydraulic cylinder 8 are fastened by screws, and the horizontal mounting face of the bracket 7 is fixedly connected to the mounting base plate 3 by screws.

[0016] like Figure 4As shown: an external thread is provided at the front end of the vertical piston rod 25 of the vertical pressing oil cylinder 20, and a guide unit of the vertical pressing movable mold 21 is provided. The guide unit includes a guide rod 32, a translation plate 33, a self-lubricating bearing 34 and a bearing pressing ring 35. The connection method is described as follows: a through hole slightly larger than the external thread provided at the front end of the vertical piston rod 25 of the vertical pressing oil cylinder 20 is provided at the center position of the translation plate 33. The translation plate 33 is fixed by a nut, and the position can be appropriately adjusted. Stepped holes are provided on both sides of the translation plate 33, wherein the diameter of the large hole section is the same as the outer diameter of the guide rod 32. An internal thread is provided at one end of the guide rod 32, and the guide rod 32 is fixedly connected to the translation plate 33 by screws. A total of two guide rods 32 are provided, which are symmetrically arranged on both sides of the vertical pressing oil cylinder 20, mainly to prevent the vertical piston rod 25 of the vertical pressing oil cylinder 20 from rotating during the reciprocating operation, thereby causing the vertical The straight pressing movable mold 21 is deflected at an angle, and an upward concave notch is provided at the lower part of the vertical pressing movable mold 21. The notch is a limiting structure provided to prevent the self-closing valve body to be pressed from deflecting during the pressing process. Therefore, the angle deflection of the vertical pressing movable mold 21 will cause the upward concave notch to deflect, further causing the self-closing valve to be pressed to be damaged during the pressing process. The setting of the guide unit can prevent the vertical piston rod 25 from twisting. A step hole is provided on the mounting top plate 5, and a self-lubricating bearing 34 is pre-installed in the step hole. The guide rod 32 extends upward through the inner hole of the self-lubricating bearing 34. In order to prevent the guide rod 32 from causing the position of the self-lubricating bearing 34 to change during the reciprocating motion, a bearing pressure ring 35 for limiting the self-lubricating bearing 34 is provided on the upper plane of the mounting top plate 5; the end position of the front end external thread of the vertical piston rod 25 of the vertical pressing cylinder 20 is also fixedly connected to the vertical pressing movable mold 21 by a locking nut.

[0017] like Figure 5As shown: the vertical pressing movable mold 21 is welded by a fixed connecting cylinder 36, a central axis anti-rotation disc 37 and a forming pressing mold 38, wherein the fixed connecting cylinder 36 is provided with an internal thread, which is matched with the front end external thread of the vertical piston rod 25 and is locked in position by a nut. After the position is locked, the upper concave notch provided at the lower part of the vertical pressing movable mold 21 will also be relatively fixed and will not deflect; a self-resetting positioning unit is also provided in the vertical pressing movable mold 21, and the self-resetting positioning unit includes a fixed ring block 27, a central axis 28, a sliding ring block 29, a guide pin 30 and an elastic element 31, wherein the upper end of the central axis 28 is milled flat on the corresponding two sides to form two mutually parallel planes, and the outer side of the central axis 28 An elastic element 31 is sleeved, and an anti-rotation structure is arranged between the upper end of the central shaft 28 and the vertical pressing movable mold 21; a structure corresponding to the upper end of the central shaft 28 is arranged at the central position of the central shaft anti-rotation disc 37, and the central shaft 28 can reciprocate in the structure without angular deflection. The outer diameter of the fixed ring block 27 is equivalent to the step diameter of the inner hole of the forming pressing mold 38. Column holes are arranged on both sides of the fixed ring block 27, and threaded holes are arranged on the side walls of the forming pressing mold 38 corresponding to the column holes. The position of the fixed ring block 27 is fastened and locked by a column head set screw. A guide pin 30 is also pre-installed on the fixed ring block 27. A countersunk hole for the central shaft 28 to pass through and position is arranged at the center of the sliding ring block 29;There are two guide pins 30 arranged symmetrically. Pin holes corresponding to the guide pins 30 are provided on the upper plane of the sliding ring block 29. The guide pins 30 are respectively inserted into the pin holes and can freely reciprocate in the pin holes. Since the position of the fixed ring block 27 is locked and cannot be angularly deflected, the symmetrically arranged guide pins 30 prevent the sliding ring block 29 from angularly deflecting. A notch is provided below the sliding ring block 29. The shape of the notch is the same as the shape of the self-closing valve to be pressed. The working mode of the self-resetting positioning unit will be explained below. Since the bottom notch of the sliding ring block 29 first contacts the self-closing valve to be pressed, it can be ensured that the position remains unchanged during further pressing. At this time, the vertical pressing movable mold 21 continues to move downward, and the sliding ring block 29 cannot continue to move downward due to the obstruction of the self-closing valve body to be pressed, but tightly fixes the self-closing valve body to be pressed. As the vertical pressing movable mold 21 continues to move downward, the elastic element 3 1 is further compressed, and the maximum compression distance of the elastic element 31 is greater than the distance that the vertical pressing movable mold 21 continues to descend, that is, before the elastic element 31 is fully compressed into place, the vertical pressing movable mold 21 has finally pressed the steel hoop blank sleeved on the outer side of the self-closing valve to be pressed into place, so it will not cause damage to the self-closing valve product itself. During the process of the sliding ring block 29 being blocked and moving upward, the guide pin 30 is inserted into the pin hole corresponding to the sliding ring block 29 to play a guiding role. After the self-closing valve product is pressed, the vertical pressing movable mold 21 moves upward under the drive of the vertical piston rod 25. At this time, the sliding ring block 29 will not leave the self-closing valve body before the elastic element 31 is fully released. At this time, the guide pin 30 moves upward under the drive of the fixed ring block 27 until the deformation of the elastic element 31 during the downward pressing process is completely released, and the sliding ring block 29 will move upward and then leave the self-closing valve body that has been pressed. ;

[0018] The specific implementation method is a further description of the utility model rather than a limitation. It is possible for ordinary technicians in this field to make further changes to the structure without departing from the essential content of the utility model, and all these changes should fall within the scope of protection of the claims attached to the utility model.

Claims

1. A self-closing valve body press molding machine, comprising a frame (1), the frame (1) being welded from square steel pipes, a hydraulic pump assembly (2) being arranged inside the frame (1), a four-column frame structure being arranged above the frame (1), the four-column frame structure comprising a mounting bottom plate (3), a column (4) and a mounting top plate (5), the upper end of the column (4) being fastened to the mounting top plate (5) by a column pressing plate (6) and screws, and the lower end of the column (4) being fastened to the mounting bottom plate (3) by a set thread, characterized in that: A horizontal pre-pressing structural component is fixedly mounted on the mounting base plate (3). The horizontal pre-pressing structural component is two groups of pre-pressing units symmetrically arranged on both sides of the mounting base plate (3). The pre-pressing units include a bracket (7) and a horizontal hydraulic cylinder (8). The front end of the horizontal hydraulic cylinder (8) is connected to a connecting block (10) via a T-shaped shaft (9). A rectangular hole is opened in the center of the connecting block (10). The tail of the pre-pressed meniscus (11) is fixed in the rectangular hole of the connecting block (10) via a square head set screw (12). The lower end of the tail of the pre-pressed meniscus (11) is fixed to the rectangular hole of the connecting block (10). An adjusting gasket (13) is arranged on the side, and a vertical pressing structure component is fixedly installed on the mounting top plate (5), wherein the vertical pressing structure component comprises a vertical pressing oil cylinder (20), a vertical pressing movable mold (21), and a vertical bearing fixed mold (22), wherein a self-resetting positioning unit is arranged inside the vertical pressing movable mold (21), and the vertical pressing oil cylinder (20) comprises a forward oil port (23) and a return oil port (24), and a stroke adjusting unit is arranged at the tail of the vertical piston rod (25) of the vertical pressing oil cylinder (20), and the stroke adjusting unit comprises an adjusting internal thread rotating member (26).

2. The compression molding machine for the self-closing valve body according to claim 1, characterized in that: The front end surface of the horizontal hydraulic cylinder (8) is provided with a mounting hole, the horizontal hydraulic cylinder (8) is fixedly connected to the bracket (7) by means of screws, and the bracket (7) is fastened to the mounting base plate (3) by means of screws.

3. The compression molding machine for the self-closing valve body according to claim 1, characterized in that: The horizontal hydraulic cylinder (8) comprises a forward oil port (14) and a backward oil port (15), and the front end and the rear end of the translation piston rod (16) of the horizontal hydraulic cylinder (8) are both provided with internal threaded holes, wherein the internal thread of the rear end is connected to an internal threaded positioning sleeve (18) via a threaded connecting rod (17), and the internal threaded positioning sleeve (18) is locked in position via a horizontal positioning nut (19).

4. The compression molding machine for the self-closing valve body according to claim 1, characterized in that: The self-resetting positioning unit comprises a fixed ring block (27), a central shaft (28), and a sliding ring block (29), wherein a guide pin (30) is fixedly mounted on the fixed ring block (27), and a pin hole corresponding to the guide pin (30) is provided on the sliding ring block (29), and the guide pin (30) reciprocates in the pin hole.

5. The compression molding machine for the self-closing valve body according to claim 4, characterized in that: The center of the sliding ring block (29) is provided with a countersunk hole for the central shaft (28) to pass through and position, the outer side of the central shaft (28) is sleeved with an elastic element (31), and an anti-rotation structure is provided between the upper end of the central shaft (28) and the vertical pressing movable mold (21).

6. The compression molding machine for the self-closing valve body according to claim 1, characterized in that: A guide unit of the vertical pressing movable die (21) is provided at the front end of the vertical piston rod (25) of the vertical pressing oil cylinder (20), and the guide unit comprises a guide rod (32), a translation plate (33), a self-lubricating bearing (34) and a bearing pressure ring (35).

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