An automatic lubrication system for a mold guide assembly

Abstract

The present invention provides an automatic lubrication system in a mold guide assembly, which relates to the field of mold lubrication technology, including a guide column and a guide sleeve connected to the upper part of the guide column, an oil storage tank is arranged inside the guide column, a central liquid riser is arranged at the central axis inside the guide column, the upper end of the central liquid riser is connected to a first one-way valve, the upper end surface of the first one-way valve is flush with the upper end surface of the guide column, the bottom of the central liquid riser is connected to a second one-way valve, a piston is arranged below the second one-way valve, a communicating vessel is arranged outside the second one-way valve and the piston, the communicating vessel is threadedly sealed and tightened with the inner side of the guide column, and the lower end of the piston is connected to a servo motor. The present invention provides an automatic lubrication system in the guide column and the guide sleeve, fully and reasonably utilizes the internal space of the mold guide column, can accurately realize the quantitative control of lubricating oil, is easy to disassemble, simple to maintain, meets production needs, and improves the service life of the mold.

Description

Technical Field

[0001] The invention relates to the technical field of mold lubrication, and in particular to an automatic lubrication system in a mold guide component body. Background Art

[0002] Guide pins are used in combination with components in molds to ensure that the mold moves with precise positioning and guides the mold travel. Guide sleeves are replaceable mold consumables such as stamping molds and plastic molds. If they are not well maintained, they will soon be worn out and eliminated. To extend the service life of guide pins and sleeves, it is not enough to rely on the quality of the guide pins and sleeves themselves, but also requires careful maintenance, inspection and lubrication.

[0003] The lubrication system between the guide pin and the guide sleeve refers to the application of lubricating oil to the surfaces of the two parts that act relative to each other. The selection of lubrication devices has a great impact on the performance, quality and life of mechanical equipment and molds. Nowadays, there are many cases of mold damage caused by lubrication problems. Lubrication work requires not only human management, but also reliable lubrication devices. A good lubrication device can evenly and continuously deliver lubricating materials to the lubrication parts, reduce the wear of moving parts, ensure accuracy and prevent accidents, so as to give full play to the performance of the equipment.

[0004] The current mold guide lubrication has several forms, such as manual lubrication, automatic lubrication of graphite materials, and automatic lubrication of in vitro hydraulic systems. Manual lubrication is that after the mold has worked for a certain period of time, the operator uses a brush to apply lubricating oil to the guide column, and the lubricating oil is evenly distributed through the reciprocating motion of the guide sleeve and the guide column. This operation method cannot ensure reliable and effective control of the production process and cannot meet the needs of large-scale and automated production in today's society. The guide lubrication of graphite materials uses the self-lubrication of graphite materials and the working principle that the graphite gap can store oil. It can be used in an environment with long-term lack of oil or no oil, thus making up for the lack of regular refueling of traditional copper sleeves. This structure is suitable for heavy loads, low speeds, reciprocating motions, and other occasions where it is difficult to lubricate and form an oil film. In the production process of high-speed reciprocating stamping dies, copper alloys and graphite are very easy to wear, resulting in excessive gaps between guide columns and guide sleeves, insufficient guiding accuracy, and product size tolerances. The extracorporeal hydraulic system automatic lubrication guide system adds an automatic oil dripping pouring system to the outside of the conventional guide column and guide sleeve. When oil injection is required, the hydraulic valves such as the solenoid valve and the pressure regulating valve are linked and controlled. Under the joint action of the cylinder and the pressure switch, the hydraulic system drips the oil to the outer surface of the guide column through the oil nozzle, thereby reducing manual workload and reducing oil consumption pollution. However, since the system is added to the outside of the mold, the structure is complex, and it cannot achieve fully automated production, it has not been widely used in the practical production of the mold industry. In summary, it is necessary to invent a mold guide lubrication system that can achieve quantitative control, can be used in the production process of high-speed reciprocating stamping molds, has a simple structure, and occupies a small space. Summary of the invention

[0005] The invention provides an automatic lubrication system in a mold guide component body, which solves the problem of complex structure of the existing mold guide lubrication method.

[0006] In order to achieve the above purpose, the technical solution adopted by the present invention is:

[0007] A mold guide assembly internal automatic lubrication system, characterized in that: it includes a guide column and a guide sleeve connected to the upper part of the guide column, an oil storage tank is arranged inside the guide column, a central liquid riser is arranged at the central axis inside the guide column, the upper end of the central liquid riser is connected to a first one-way valve, the upper end surface of the first one-way valve is flush with the upper end surface of the guide column, the bottom of the central liquid riser is connected to a second one-way valve, a piston is arranged below the second one-way valve, a communicating vessel is arranged outside the second one-way valve and the piston, the communicating vessel is threadedly sealed and tightened with the inner side surface of the guide column, and the lower end of the piston is connected to a servo motor.

[0008] Preferably, a wire hole is provided on the side surface of the lower end of the guide column, and the wire passes through the wire hole and is connected to the servo motor.

[0009] Preferably, an oil inlet passage is provided on the communicating vessel, one end of the oil inlet passage is connected to the bottom of the communicating vessel, and the other end is connected to the upper end surface of the communicating vessel.

[0010] Preferably, a sealing ring is provided between the piston and the inner wall of the guide column.

[0011] Preferably, a plurality of flat oil grooves are provided on the upper end surface of the guide column.

[0012] Preferably, a spiral groove is provided on the outer surface of the guide post.

[0013] Preferably, a third one-way valve is provided on the side wall of the guide column.

[0014] Preferably, the upper end of the central liquid riser tube is transitionally fitted with the upper end of the guide column, and the lower end of the central liquid riser tube is interference fit with the communicating vessel.

[0015] Preferably, an upper template is provided on the upper portion of the guide sleeve, and a lower template is provided on the lower portion of the guide column.

[0016] The beneficial effects of the present invention are:

[0017] The invention provides an automatic lubrication system in the guide pin and the guide sleeve, fully and reasonably utilizes the internal space of the mold guide pin, can accurately realize the quantitative control of the lubricating oil, is easy to disassemble and maintain, meets production needs, and increases the service life of the mold;

[0018] All parts of the mechanism designed in the present invention are hidden inside the guide column, avoiding the original bulky external mechanism and rationally utilizing the internal space of the mold guide column. At the same time, the mechanism organically combines the servo motor and the number of reciprocating motions of the stamping equipment, and provides the amount of oil according to the number of working times of the mold, so that the amount of lubricating oil can be controlled more accurately and reliably. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the present invention or the technical solutions of the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0020] Figure 1 It is the front view of the present invention.

[0021] Figure 2 It is a top view of the present invention.

[0022] Figure 3 for Figure 2 AA section view.

[0023] Figure 4 for Figure 3 Enlarged view of part B in the middle.

[0024] Figure 5 for Figure 3 Enlarged view of part C in the middle.

[0025] Figure 6 It is a three-dimensional structural diagram of the present invention.

[0026] Description of Figure Numbers:

[0027] 1. Upper template; 2. Guide sleeve; 3. Guide column; 4. Connecting vessel; 5. Servo motor; 6. Lower template; 7. Wire hole; 8. Center riser; 9. Second one-way valve; 10. Piston; 11. Sealing ring; 12. Oil reservoir; 13. First one-way valve; 14. Third one-way valve; 15. Spiral groove; 16. Flat oil groove. DETAILED DESCRIPTION

[0028] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0029] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings 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. The following description of at least one exemplary embodiment is actually only illustrative and is by no means intended to limit the present invention and its application or use. 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.

[0030] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit exemplary embodiments according to the present invention. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprising" and / or "including" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0031] Unless otherwise specifically stated, the relative arrangement, numerical expressions and numerical values ​​of the parts and steps described in these embodiments do not limit the scope of the present invention. At the same time, it should be clear that, for ease of description, the sizes of the various parts shown in the drawings are not drawn according to the actual proportional relationship. The technology, methods and equipment known to ordinary technicians in the relevant field may not be discussed in detail, but in appropriate cases, the technology, methods and equipment should be regarded as a part of the authorization specification. In all examples shown and discussed here, any specific value should be interpreted as being merely exemplary, rather than as a limitation. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters represent similar items in the following drawings, so once a certain item is defined in an accompanying drawing, it does not need to be further discussed in subsequent drawings.

[0032] In the description of the present invention, it is necessary to understand that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the drawings. They are only for the convenience of describing the present invention and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the device or element referred to must have a specific direction or be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the scope of protection of the present invention: the directional words "inside and outside" refer to the inside and outside relative to the contours of each component itself.

[0033] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. If not otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of the present invention.

[0034] The present invention provides a technical solution: Figure 1 As shown, an automatic lubrication system in a mold guide assembly includes a guide column 3 and a guide sleeve 2 connected to the upper part of the guide column 3, an upper template 1 is provided on the upper part of the guide sleeve 2, and a lower template 6 is provided on the lower part of the guide column 3. A plurality of oil grooves are provided on the upper end surface of the guide column 3, and a third one-way valve 14 is provided on the side wall of the guide column 3. A spiral groove is provided on the outer surface of the guide column 3. An oil reservoir 12 is provided inside the guide column 3, and a central liquid riser 8 is provided at the central axis inside the guide column 3. The upper end of the central liquid riser 8 is connected to a first one-way valve 13, and the upper end surface of the first one-way valve 13 is flush with the upper end surface of the guide column 3. The bottom of the central liquid riser 8 is connected to a second one-way valve 9, and the upper end of the central liquid riser 8 is transitionally matched with the upper end of the guide column 3, and the lower end of the central liquid riser 8 is interference-fitted with the communicating vessel 4. A piston 10 is provided below the second one-way valve 9, and a sealing ring 11 is provided between the piston 10 and the inner wall of the guide column 3. A communicating vessel 4 is provided outside the second one-way valve 9 and the piston 10. The communicating vessel 4 is provided with an oil inlet passage, one end of which is connected to the bottom of the communicating vessel 4, and the other end is connected to the upper end surface of the communicating vessel 4. The communicating vessel 4 is thread-sealed and fastened to the inner side surface of the guide column 3, and the lower end of the piston 10 is connected to the servo motor 5. A wire hole 7 is provided on the side surface of the lower end of the guide column 3, and the wire passes through the wire hole 7 and is connected to the servo motor 5.

[0035] Working principle of the present invention: an oil reservoir 12 is arranged inside the guide column 3. The hole diameter of the oil reservoir 12 is 20 mm and the length is 200 mm, which is equivalent to an oil storage tank. The inner hole diameter of the oil reservoir 12 is as large as possible under the premise of meeting the guide column strength, and the oil storage capacity should meet the use requirement of one month. The lubricating oil stored in the oil reservoir 12 is divided into two areas, inner and outer, by the division of the central riser 8. The upper end of the lubricating oil inside the central riser 8 flows to the upper surface of the guide column 3 in one direction through the first one-way valve 13. The bottom of the central riser 8 is connected to the second one-way valve 9 and the communicating vessel 4. Under the action of gravity, the lubricating oil enters the bottom of the communicating vessel 4 from the oil inlet channel with a diameter of 2 mm on the side of the communicating vessel 4. The lower end of the bottom of the communicating vessel 4 contacts the upper end of the piston 10. At the same time, the communicating vessel 4 is thread-sealed and tightened with the inner side of the guide column 3.

[0036] The present invention realizes the lubrication working process of the guide assembly: when the oil is fed, the servo motor 5 receives the control of the number of reciprocating motions from the stamping machine through the wire. For example, it is set that the machine oil is automatically dripped once when the mold reciprocates 100 times, that is, the servo motor 5 acts once at the 100th time, pushing the piston 10 to move upward. The stroke of the piston 10 and the diameter of the piston 10 determine the volume of the lubricating oil pushed each time. At the same time, the piston 10 moves upward and its side blocks the oil inlet channel with a diameter of 2mm to prevent oil return, and the sealing ring 11 of the piston 10 prevents the lubricating oil from leaking from the side of the piston 10. At this time, the lubricating oil enters the central liquid riser 8 through the second one-way valve 9 under the push of the piston 10, and then enters the upper end surface of the guide column 3 through the first one-way valve 13, and then is distributed to the six flat oil grooves 16 on the upper end surface of the guide column 3. The six flat oil grooves 16 on the upper end surface of the guide column 3 are radially symmetrical, 2mm wide, 0.5mm deep, with R at the root, and the side spiral groove 15 has a spiral rise angle of 35° and a depth of 0.5-1mm. The end face lubricating oil flows downward along the spiral groove on the outer wall of the guide column 3 under the action of gravity, so as to realize the lubrication of the outer surface of the guide column 3. At the same time, due to the matching size of the guide sleeve 2 and the guide column 3 and multiple reciprocating cycles, the working conditions make the outer surface of the guide column 3 and the inner hole circumference of the guide sleeve 2 completely lubricated. During the full stroke operation, the installation direction of the first one-way valve 13 and the second one-way valve 9 must ensure that the lubricating oil enters the central liquid riser 8 from the piston 10 and flows from the central liquid riser 8 into the upper end face of the guide column 3. The reverse installation cannot realize its function. The servo motor 5 can adjust the control of the movement interval time of the piston 10. The signal it receives comes from the number of reciprocating movements of the stamping machine. When the mold is not opened and closed once, the counter records it once (the stamping mold is generally at the bottom dead center position). When the set number of reciprocating mold movements is reached, the piston moves up and down once to supply oil.

[0037] The present invention realizes the movement process of lubricating and replenishing lubricating oil: after the lubricating oil is pushed out once, the piston 10 moves downward to the bottom of the 2mm oil inlet hole of the communicating vessel 4 and stops moving. At this time, the lubricating oil passes through the 2mm oil channel of the communicating vessel 4 under the action of gravity to fill the space between the upper end surface of the piston 10 and the lower end surface of the communicating vessel 4, thereby realizing a primary compensation of the oil.

[0038] The lubricating oil pool inside the guide column 3 of the present invention is replenished: each time the lubricating oil is automatically lubricated, the oil inside the oil reservoir 12 is slightly reduced, and the liquid level drops. When the liquid level drops to a certain height of the upper surface of the communicating vessel 4, the oil inside the guide column 3 must be replenished. The third one-way valve 14 on the side of the guide column 3 is used. The assembly surface of the third one-way valve 14 is recessed by 1mm compared to the outer surface of the guide column 3. The oil can only be injected from the outer side of the guide column 3 to the inner side, and the internal lubricating oil cannot flow out from the position of the third one-way valve 14. This operation process is simple.

[0039] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. An automatic lubrication system in a mold guide assembly, characterized in that: The invention comprises a guide column (3) and a guide sleeve (2) connected to the upper part of the guide column (3); an oil storage tank (12) is arranged inside the guide column (3); a spiral groove (15) is arranged on the outer surface of the guide column (3); the end surface lubricating oil flows downward along the spiral groove (15) on the outer wall of the guide column (3) under the action of gravity, so as to achieve lubrication of the outer surface of the guide column (3); a central liquid riser (8) is arranged at the central axis inside the guide column (3); the upper end of the central liquid riser (8) is connected to a first one-way valve (13); the upper end surface of the first one-way valve (13) is connected to the guide column (3); The upper end surface of the guide column (3) is flush with the upper end surface of the guide column (3), the bottom of the central liquid lifting pipe (8) is connected to the second one-way valve (9), a piston (10) is arranged below the second one-way valve (9), a connecting vessel (4) is arranged outside the second one-way valve (9) and the piston (10), the connecting vessel (4) is thread-sealed and fastened to the inner side surface of the guide column (3), an oil inlet channel is opened on the connecting vessel (4), one end of the oil inlet channel is connected to the bottom of the connecting vessel (4), and the other end is connected to the upper end surface of the connecting vessel (4), and the lower end of the piston (10) is connected to the servo motor (5).

2. The automatic lubrication system in the mold guide assembly according to claim 1, characterized in that: A wire hole (7) is provided on the side surface of the lower end of the guide column (3), and a wire passes through the wire hole (7) and is connected to the servo motor (5).

3. The automatic lubrication system in the mold guide assembly according to claim 1, characterized in that: A sealing ring (11) is provided between the piston (10) and the inner wall of the guide column (3).

4. The automatic lubrication system in the mold guide assembly according to claim 1, characterized in that: A plurality of flat oil grooves (16) are arranged on the upper end surface of the guide column (3).

5. The automatic lubrication system in the mold guide assembly according to claim 1, characterized in that: A third one-way valve (14) is arranged on the side wall of the guide column (3).

6. The automatic lubrication system in the mold guide assembly according to claim 1, characterized in that: The upper end of the central liquid-raising pipe (8) is transitionally matched with the upper end of the guide column (3), and the lower end of the central liquid-raising pipe (8) is interference matched with the communicating vessel (4).

7. The automatic lubrication system in the mold guide assembly according to claim 1, characterized in that: An upper template (1) is arranged on the upper part of the guide sleeve (2), and a lower template (6) is arranged on the lower part of the guide column (3).

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