Self-lubricating core mold spinning mold

Abstract

The invention discloses an automatic lubricating core mold spinning mold. Key devices such as an oil duct, an oil inlet, an oil outlet and an oil cavity are integrated. A piston rod penetrating structure passes through the inner sides of other parts, a gear rear cover of the planetary gearbox is connected with a rod end cover in a glued mode, the upper end of the outer cylinder is fixedly connected with the rod end cover through a double-end stud, an inner oil cavity, namely an oil channel in the inner cylinder is attached to the inner surface of the outer cylinder, a piston is connected to the lower end of the piston rod through threads, and the piston and the piston rod are located in the inner cylinder. According to the invention, precise supply of lubricating oil is realized. In the spinning process, the inner barrel and the outer barrel cooperatively work at a specific speed ratio, it is ensured that lubricating oil can be accurately and timely added in the most needed place, and therefore the lubricating effect is greatly improved. According to the core mold spinning device, lubricating oil can be accurately applied to key machining positions, sufficient utilization of the lubricating oil is guaranteed, unnecessary waste is avoided, production efficiency is improved, and meanwhile finer and more efficient operation experience is brought to the core mold spinning process.

Description

Technical Field

[0001] The invention belongs to the technical field of mechanical processing, and in particular relates to an automatic lubricating core mold spinning mold. Background Art

[0002] There are various types of spinning processes on the market. Friction between the blank and the core mold is inevitable during the spinning process. This relative movement in a high-stress state can cause surface damage to the mold and the blank, or even rupture and failure. Improving the lubrication conditions between the core mold and the blank and reducing friction can significantly improve the spinning forming state, reduce the friction between the mold and the blank, and reduce the material's deformation resistance.

[0003] At present, the spinning technology rarely considers the lubrication of the core mold and the blank. Most of the time, lubricating oil is applied to the core mold before spinning, and sometimes no lubricating oil is even applied. During the spinning process, the friction between the core mold and the metal material will generate a lot of heat. If the lubrication is insufficient, it will not only increase the wear of the mold, but also affect the surface quality and dimensional accuracy of the workpiece. Because the material continues to flow during the spinning process, the applied lubricating oil will be taken away by the formed material under the action of high pressure, making the lubrication conditions of the blank and the core mold very poor, which will lead to surface scratches, internal and external delamination of the workpiece, and damage to the core mold. In addition, the manual or mechanical application of lubricating oil often makes it difficult to ensure the uniform distribution of the oil film on the surface of the core mold, which will lead to local stress concentration during the spinning process and increase the risk of material rupture or delamination. In addition, the ordinary lubricating liquid spraying method has low precision, resulting in a large amount of lubricating liquid waste. Summary of the invention

[0004] The purpose of the present invention is to overcome the above-mentioned deficiencies in the prior art and to provide an automatically lubricating core mold spinning mold, which achieves an automatic, efficient and uniform lubrication effect.

[0005] The technical solution of the present invention is as follows:

[0006] The design device of the automatic lubrication core mold spinning mold consists of four main bodies, namely: outer cylinder, inner oil chamber, piston and piston rod, planetary gearbox; the piston rod penetrates the structure through the inside of other parts, the gear rear cover of the planetary gearbox is glued to the rod end cover, the upper end of the outer cylinder is connected and fixed to the rod end cover by studs, the inner oil chamber, that is, the oil channel on the inner cylinder, fits the inner surface of the outer cylinder, and the piston is threadedly connected to the lower end of the piston rod, and both are located in the inner cylinder. Outside the main structure, the tail top and the piston rod are connected by a key so that the two will not move relative to each other. The tail top contains an oil pipe that communicates with the hollow piston rod. The tail top can push the piston rod to move and absorb lubricating oil. The upper part of the piston rod is connected to the tail top, and the middle part passes through the planetary gearbox. The planetary gearbox, as a transmission device, is composed of a sun gear, a planetary gear and an internal gear. The planetary gear is connected to the sun gear through a connecting shaft. The working principle of the planetary gear device is to transmit power and torque through the rotation of the sun gear. When the sun gear rotates, it will drive the internal gear and the planetary gear to rotate together. The outside is connected by the front and rear covers of the gears through threads, and the rear cover of the gears is fixed with the rod end cover by bonding. The piston rod is axially matched with the sun gear, the planetary pinion is connected to the base through the shaft, the base is connected to the upper cover of the sliding sleeve through bolts, and the upper cover of the sliding sleeve is connected to the inner cylinder through studs, so that the planetary gearbox can drive the inner cylinder to rotate. The piston rod passes through the sliding sleeve, which adjusts or limits the range of movement during movement, and the sealing ring on the sliding sleeve prevents the leakage of lubricating oil. The connection between the piston and the tail of the piston rod adopts a nut-type connection method, and there are 2 sealing rings on the piston to prevent oil leakage during operation. One end of the spring is fixed to the lower end of the sliding sleeve by bonding, and the other end of the spring is connected to the upper end face of the piston by bonding. The lubricating oil is controlled by the up and down movement of the piston. At the same time, the end of the piston rod is connected by a one-way valve that controls the flow direction of the oil through a threaded connection to guide the lubricating oil. The lower end of the inner cylinder is fixed to the rodless cavity end cover by means of a double-headed stud connection. The inner cylinder is nested in the outer cylinder. The outer cylinder is fixed to the rod end cover and the rodless cavity end cover at the upper and lower ends of the outermost sides by bolts respectively. The array-distributed oil ports on the outer cylinder cooperate with the oil channels on the inner cylinder to realize the lubricating oil transportation and processing materials in all directions.

[0007] 1. The mold has the function of automatically extracting and discharging lubricating oil, realizing the intelligent management of lubrication inside the spinning cylinder. This function automatically senses and adjusts the supply of lubricating oil by utilizing the mechanical energy conversion during the spinning process, ensuring that the inner wall of the cylinder is evenly and properly lubricated during high-speed rotation and material deformation, effectively reducing friction resistance, extending the service life of the mold and the cylinder, and improving the precision and surface quality of spinning.

[0008] 2. The planetary gear transmission system cleverly integrated into the inner side of the mold not only demonstrates a high degree of mechanical design wisdom, but also greatly optimizes the control strategy of the lubricating oil. With its efficient and stable transmission characteristics, the planetary gear accurately controls the opening and closing degree and frequency of the oil outlet valve, realizing precise regulation of the lubricating oil flow.

[0009] 3. Lubricating oil is steadily extracted from the special oil storage tail top. This design makes full use of the spatial layout of the mold structure and realizes the recycling of lubricating oil. The tail top not only serves as a storage and supply station for lubricating oil, but also cleverly serves as a torque transmission point for the middle push rod of the core mold. Through its internal precision mechanical structure, it efficiently transmits power to the push rod to ensure the smooth progress of the spinning process.

[0010] Compared with the prior art, the present invention has the following technical effects:

[0011] (1) It has the ability to automatically lubricate the core mold. The core mold of the present invention automatically releases oil as the tail top is pressed down during operation, so that the mold can be fully lubricated during operation. The transmission device can realize automatic lubrication of the mechanical structure.

[0012] (2) Automatic oil suction and oil discharge process. The internal part of the present invention is a volumetric pump, which completes its oil suction and lubricating oil supply functions through the up and down movement of the piston; the external part is a spinning mold with a special lubricating oil flow channel to output the oil to the working area.

[0013] (3) Effective lubrication of the working area is achieved. During the spinning process, the oil outlet moves with the movement of the tail top and is always located in the spinning working area. This not only effectively reduces the friction between the core mold and the blank, reduces scratches on the blank, mold wear, and reduces material deformation resistance, but also improves the accuracy of lubrication and reduces unnecessary waste during the lubrication process.

[0014] (4) Save lubricating oil. The front speed of the present invention is a speed regulating function, which can control the interval time of each lubricating oil discharge, control the oil discharge cycle, and save lubricating oil. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 The overall front view of the core mold appearance structure of the present invention

[0016] Figure 2 Schematic diagram of the overall cross-sectional structure of the automatic lubricating core mold spinning mold of the present invention

[0017] Figure 3 Schematic diagram of the internal structure of the piston spinning work

[0018] Figure 4 Overall axonometric drawing of the internal working structure of the core mold

[0019] Figure 5Top view of the inner part of the spinning core mold for cylindrical parts

[0020] Figure 6 Schematic diagram of the internal structure of a planetary gearbox

[0021] Figure 7 Internal structure of the sliding sleeve DETAILED DESCRIPTION

[0022] Figure 1 The figure shows the overall external structure of an automatic lubricating core mold spinning mold of the present invention. Figure 2 The schematic diagram of the overall cross-sectional structure of the core mold spinning mold shown in the figure includes a tail top 1 containing an oil pipe, a piston rod 2, a planetary gear box 3, a rod end cover 4, a sleeve 5, a sleeve upper end cover 6, a spring 7, a piston 8, an oil inlet 9, a rodless cavity end cover 10, an inner cylinder (oil cavity) 11, an oil outlet 12, an oil channel 13, a core mold (outer cylinder) 14, a rodless end cover 15, a one-way valve 16, a gear front cover 17, and a gear rear cover 18.

[0023] like Figure 2 and 3 As shown, when not working, the tail top 1 is located above the piston rod 2. When oil needs to be supplemented, the tail top 1 moves downward and is connected and fixed to the piston rod 2 through a key connection. The two will not move relative to each other. The tail top 1 pushes the piston rod 2 to move downward, and at the same time compresses the spring 7 fixed at the lower end of the sliding sleeve 5 and the upper end of the piston 8. Then the tail top 1 returns to the initial position, and the connection between the piston 8 and the piston rod 2 adopts a nut-type connection method, thereby driving the piston 8 to move. At this time, the spring 7 begins to recover its deformation from the stretched state, providing an upward rebound force for the movement of the piston 8, thereby realizing the upward movement to absorb oil; the lubricating oil is input into the oil chamber 13 through the one-way valve 16 connected to the end of the piston rod 2 (hollow rod), and the oil supplement is completed. The planetary gears in the planetary gearbox 3 are connected to the base through the shaft, and the base is connected to the upper end cover 6 of the sliding sleeve through bolts. The inner cylinder 11 and the upper end cover 6 of the sliding sleeve are connected through studs, which drive the inner cylinder 11 to rotate so that it has a certain speed; the outer cylinder (core mold) 14 is connected to the main shaft to rotate together so that it has a certain speed. Therefore, during the spinning process, the inner and outer cylinders move relative to each other at a certain speed ratio. When the oil outlet of the oil channel 13 and the outer cylinder 14 are not aligned, the oil chamber pressurizes the oil channel through the one-way valve 16. When the spinning starts, the oil channel is aligned with the oil outlet of the outer cylinder and the lubricating oil is discharged through the oil pressure, thereby achieving the required lubrication purpose.

[0024] like Figure 3 Schematic diagram of the structure of the inner tube and Figure 4As shown in the overall axonometric diagram of the internal working structure of the core mold, there is a certain gap between the inner cylinder 11 and the core mold 14 and the axial fit of the piston rod 2. The oil channel 13 is fitted with the inner surface of the core mold 14. The tail top 1 pushes the piston rod 2 to move downward to discharge oil to lubricate the workpiece. It can be seen that the piston rod is hollow, and an oil circuit is added to the tail top 1 at the connection between its head and the tail top. The piston 8 moves up and down in the inner cylinder 11. Because there is a one-way valve 16 controlling the flow direction of the oil at the bottom of the oil chamber and the end of the piston rod, when the piston 8 moves upward under the action of the spring 7, the oil outlet 12 is closed and a sealing ring is provided to prevent oil from leaking outward. Since the pressure in the oil chamber 11 is reduced, the lubricating oil enters the oil chamber through the oil channel in the piston rod 2 and the one-way valve 16, storing a certain amount of lubricating oil to ensure the supply of lubricating oil during the spinning process.

[0025] like Figure 5 This is a top view of the inside of the spinning core mold. It can be seen that most of the parts are cylindrical or annular structures, and the connection method is mostly threaded nuts. The hollow piston rod 2 passes through the mold and is one of the important parts for transporting lubricating oil. It can also be clearly seen that the oil outlet 12 and the outer cylinder (core mold) 14 have a clearance fit. Figure 6 The planetary gearbox is the transmission device of the mold. The sun gear is located in the center of the internal structure. The planetary gears rotate around the sun gear. At the same time, the planetary gears also rotate around the axis of the sun gear with the planet carrier. The ring gear meshes with the planetary gears to form a complete planetary gear system. By adjusting the number of teeth on the planetary gears and the motion state of the planet carrier, different transmission ratios and transmission direction changes can be achieved. The inner and outer barrels can have a relative motion speed, and the speed ratio is constant. Figure 7 Sliding sleeve structure, the upper cover of the sliding sleeve and the sliding sleeve have a threaded structure, which is fixed by threaded connection. The inner and outer sleeves are equipped with sealing rings to prevent oil leakage during operation. By installing the sliding sleeve, the friction surface can be isolated from the machine parts, thereby reducing friction and wear, and improving the operating efficiency and service life of the piston rod.

[0026] Mechanical working process of the present invention:

[0027] Spinning is a process in which the blank is fixed to the end of the spinning machine mold with a top block, and the device rotates together with the motor. After reaching a certain rotation speed, the spinning wheel starts to extrude the blank from the end, so that the blank is gradually deformed, and through continuous plastic deformation, it forms a part similar to the shape of the mold, and finally all of them are formed into a hollow part. The automatic lubrication core mold spinning mold designed in this way can automatically add lubricating oil to the required places during the spinning process, complete the lubrication between the blank and the core mold, and improve the quality of spinning. This mold has oil channels, oil inlets, oil outlets, oil chambers and other devices. The oil chamber is placed inside the mold, and then the oil is accurately added to the required places through a certain speed ratio between the inner and outer barrels. This design makes up for the shortcomings of traditional lubricating oil addition, and can accurately add lubricating oil to the required processing locations, so that the lubricating oil can be fully used. For manual labor, the workload during the spinning process is reduced.

[0028] The core mold device is fixed on the main shaft of the spinning equipment. The cylindrical blank is put on the core mold before the piston cavity works. If there is insufficient oil in the cavity, an oil replenishment action is performed, and the tail top 1 moves downward to connect with the piston rod 2, compressing the spring 6; then the tail top moves upward to the initial processing position, at which time the piston is flush with the rotating wheel; at this time, the spring 6 begins to recover from the stretched state, and the piston 8 is reset by the spring to achieve upward movement to absorb oil. The lubricating oil is input into the oil chamber 13 through the one-way valve 16 connected to the end of the piston rod 2 to complete the oil replenishment. The main shaft rotates, the rotating wheel extrude the blank, the tail top 1 moves axially synchronously with the rotating wheel, presses down the core mold piston rod 2, and moves downward to discharge oil to lubricate the workpiece; the bottom of the outer cylinder (core mold) 14 is connected to the main shaft and rotates together, the planetary gear frame is connected to the inner cylinder of the core mold and rotates together, and the piston rod 2 is connected to the tail top 1 through the interface and does not rotate. Therefore, during the spinning process, the inner and outer cylinders move relative to each other at a certain speed ratio, and the lubricating oil is accurately squeezed through the channel to the contact surface between the core mold and the blank at a specific period. After the workpiece is spun to the target size, the spindle stops, the spinning wheel and tail top are withdrawn, the mold is removed, and the processing is completed.

Claims

1. An automatic lubricating core mold spinning mold, characterized in that: It includes an outer cylinder, an inner oil chamber, a piston and a piston rod, and a planetary gear box; the piston rod penetrates the structure through the inner side of other parts, the gear rear cover of the planetary gear box is glued to the rod end cover, the upper end of the outer cylinder is connected and fixed to the rod end cover by a stud, the inner oil chamber, that is, the oil channel on the inner cylinder, fits with the inner surface of the outer cylinder, and the piston is threadedly connected to the lower end of the piston rod, and both are located in the inner cylinder.

2. The automatic lubricating core mold spinning mold according to claim 1 is characterized in that: The upper part of the overall structure is connected by a tail top and a piston rod through a key. The tail top contains an oil pipe that is connected to the hollow piston rod. The tail top can push the piston rod to move and absorb the lubricating oil.

3. The automatic lubricating core mold spinning mold according to claim 2 is characterized in that: The upper part of the piston rod is connected to the tail top, and the middle part passes through the planetary gear box. The planetary gear box as a transmission device is composed of a sun gear, a base, a planetary gear and an internal gear. The planetary gear is connected to the sun gear through a connecting shaft. The outside is connected by a front cover and a rear cover of the gear through threads, and the rear cover of the gear is fixed to the rod end cover by bonding.

4. The automatic lubricating core mold spinning mold according to claim 1 is characterized in that: The piston rod cooperates with the sun gear axially, the planetary pinion is connected to the base through the shaft, the base is connected to the upper end cover of the sliding sleeve through bolts, and the upper end cover of the sliding sleeve is connected to the inner cylinder through studs, so that the planetary gearbox can drive the inner cylinder to rotate.

5. The automatic lubricating core mold spinning mold according to claim 1 is characterized in that: The piston rod passes through the sliding sleeve, which adjusts or limits the range of movement during exercise. The sliding sleeve is provided with inner and outer sealing rings to prevent leakage of lubricating oil. The connection between the piston and the tail of the piston rod adopts a nut-type connection method. There are two sealing rings on the piston to prevent oil leakage during operation.

6. The automatic lubricating core mold spinning mold according to claim 5 is characterized in that: The lower end of the sleeve is connected to one end of the spring by adhesive connection, and the other end of the spring is connected to the upper end surface of the piston by adhesive connection. The piston can move up and down through the elastic deformation of the spring. The end of the piston rod is also threadedly connected to a one-way valve that controls the flow direction of the oil to guide the lubricating oil, thereby allowing the lubricating oil to be stored in the inner cylinder, i.e., the oil chamber.

7. The automatic lubricating core mold spinning mold according to claim 1, characterized in that: The lower end of the inner cylinder is fixed to the rodless chamber end cover by a studded connection, and the upper end of the inner cylinder is connected to the upper end cover of the sliding sleeve by a studded connection. The inner cylinder, i.e., the lower end of the oil chamber, is provided with an oil outlet, which is communicated with a one-way valve. When the piston moves downward, the lubricating oil stored in the inner cylinder, i.e., the oil chamber, can be discharged to the oil channel on the outer wall of the inner cylinder, i.e., the oil chamber through the one-way valve.

8. The automatic lubricating core mold spinning mold according to claim 1 or 7, characterized in that: The oil channel fits the inner surface of the outer tube. When the oil channel and the oil outlet of the outer tube are not aligned, the oil chamber pressurizes and delivers lubricating oil to the oil channel through a one-way valve. When spinning begins, the oil channel and the oil outlet of the outer tube are aligned at the same time and the lubricating oil is discharged out through oil pressure, thereby achieving the required lubrication purpose.

9. The automatic lubricating core mold spinning mold according to claim 1, characterized in that: The outer cylinder is fixed to the rod end cover and the rodless cavity end cover by bolts at the upper and lower ends of the outermost side respectively. The oil ports distributed in an array on the outer cylinder cooperate with the oil channels on the inner cylinder to realize the lubricating oil transportation and processing materials in all directions.

10. The automatic lubricating core mold spinning mold according to claim 1, characterized in that: The planetary gearbox makes the inner and outer barrels have relative motion speed, and the planetary gearbox makes the oil channel rotate and evenly distribute around the core mold, cooperating with the oil channel of the oil pump to achieve the purpose of adding lubricating oil at the required position.

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