Protective device for ejector cylinder of press machine

Abstract

The utility model belongs to the technical field of protection for a material ejection cylinder of a press machine, and particularly relates to a protection device for the material ejection cylinder of the press machine, which comprises a material ejection cylinder body protection cover and a material ejection rod protection cover fixed on the top plate surface of the material ejection cylinder body protection cover, a pressing plate integrated with the ejector rod protective cover is arranged at the top end of the ejector rod protective cover, and a sealing ring mounting part is arranged in an inner cavity of the pressing plate; and an ejection air cylinder body mounting cavity is formed in the ejection air cylinder body protective cover. Due to the structure, the service life of the air cylinder is prolonged, the later maintenance cost is reduced, the labor intensity of maintenance workers is reduced, and the use cost is reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of protection for a press machine top material cylinder and provides a protection device for a press machine top material cylinder which can prolong the service life of the cylinder, reduce the later maintenance cost, reduce the labor intensity of maintenance workers and reduce the use cost. Background Art

[0002] Part of the release agent sprayed from the release agent nozzle in the workshop forging process is mixed with the product oxide scale attached to the forging die, and is blown back to the front end of the press ejector cylinder and condensed into solid precipitates. The solid precipitates cause great damage to the piston rod and the sealing ring installation part of the ejector cylinder. Leakage occurs at most one week after replacing a new cylinder. Generally, it takes no more than two months to replace a new cylinder again or remove the cylinder for cleaning and repair and replace the new sealing ring installation part. According to statistics from our company, the two workshops of our company, forging and forging, will use 97 new ejector cylinders in 2023 alone. Each cylinder costs about 600 yuan, and the cost of the cylinder is about 59,000 yuan. The two workshops repair and replace cylinders an average of about 31 times a month, each time taking an average of 3 hours. The cumulative downtime per year is 12×31×3=1116 hours, which is equivalent to nearly 4 months of production time for an employee. More production downtime costs will be incurred due to downtime to replace cylinders. Due to the harsh working environment, even a new cylinder will leak in about 5 days on average. Only when the leakage is so serious that production cannot be carried out (the leakage blows out the heading product in the forging die) will the workshop take the initiative to replace or repair the cylinder. During this period, the cylinder is always in a leaking state, consuming a large amount of compressed air costs.

[0003] To sum up, the cost of cylinders is high, it takes a lot of time to replace cylinders, and long-term air leakage leads to a lot of waste of compressed air. These are technical problems that need to be solved urgently in this industry. It is imperative to design a protective device for the press ejector cylinder. Utility Model Content

[0004] In view of this, the purpose of the utility model is to provide a protective device for a press machine top-loading cylinder, which can reduce the subsequent maintenance cost, reduce the labor intensity of maintenance workers and reduce the use cost.

[0005] In order to achieve the above object, the utility model provides the following technical solutions:

[0006] The utility model provides a protective device for a press machine's ejection cylinder, which comprises a ejection cylinder body protective cover, a ejection rod protective cover fixed on the top plate surface of the ejection cylinder body protective cover, a guide sleeve is arranged on the top of the inner cavity of the ejection rod protective cover, a pressing plate integrated with the ejection rod protective cover is arranged at the top end of the ejection rod protective cover, a sealing ring mounting portion is arranged in the inner cavity of the pressing plate; a ejection cylinder body mounting cavity is arranged on the ejection cylinder body protective cover.

[0007] In order to further improve the protection and extend the service life of the ejection cylinder, in the above scheme, further: a secondary protective cover of the ejection rod integrated with the pressure plate is fixed on the pressure plate.

[0008] In order to facilitate the loading and unloading of the secondary protective cover of the ejector rod, in the above scheme, further: the pressing plate and the secondary protective cover of the ejector rod are fixed as a whole by screws.

[0009] In order to facilitate the loading and unloading of the ejector rod protective cover, in the above scheme, further: the ejector cylinder body protective cover and the ejector rod protective cover are fixed as a whole by bolts.

[0010] To facilitate the installation of the pull rod, in the above scheme, further: at least two pull rod installation holes are provided on the cylinder body protective cover of the ejection cylinder.

[0011] The beneficial effect of the utility model is that due to the structure, the mixed solid condensate of the release agent and the oxide scale is isolated outside the ejection cylinder and cannot cause damage to the cylinder seal ring mounting part and the piston rod. The use performance of the ejection cylinder is effectively guaranteed, the service life of the ejection cylinder is extended, and in the same time period, the maintenance frequency of maintenance workers is reduced, which also reduces the labor intensity of workers and reduces the later maintenance cost and use cost.

[0012] Other advantages, objectives and features of the present invention will be described in the following description to some extent, and will be apparent to those skilled in the art based on the following examination and research, or can be taught from the practice of the present invention to some extent. The objectives and other advantages of the present invention can be achieved and obtained through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to make the purpose, technical solution and advantages of the utility model clearer, the utility model will be described in detail below in conjunction with the accompanying drawings, in which:

[0014] Figure 1 It is a structural schematic diagram of the utility model;

[0015] Figure 2 It is a schematic diagram of the structure when the utility model is used;

[0016] Figure numerals: 1. Protective cover of the ejector cylinder body; 2. Protective cover of the ejector rod; 3. Guide sleeve; 4. Pressing plate; 5. Sealing ring mounting part; 6. Secondary protective cover of the ejector rod; 7. Pull rod mounting hole; 8. Installing cavity of the ejector cylinder body; 9. Pull rod; 10. Fixed seat; 11. Ejector cylinder; 12. Ejector rod. DETAILED DESCRIPTION

[0017] The following describes the implementation of the present invention through specific examples. Those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. The present invention can also be implemented or applied through other different specific implementations, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that the illustrations provided in the following embodiments only illustrate the basic concept of the present invention in a schematic manner. The following embodiments and the features in the embodiments can be combined with each other without conflict.

[0018] The accompanying drawings are only used for illustrative purposes and are only schematic diagrams, not physical drawings, and cannot be understood as limitations on this patent; in order to better illustrate the embodiments of the utility model, some parts of the accompanying drawings may be omitted, enlarged or reduced, and do not represent the size of the actual product; it is understandable to those skilled in the art that some well-known structures and their descriptions in the accompanying drawings may be omitted. In addition, the utility model may repeat reference numbers and / or letters in different examples. This repetition is for the purpose of simplification and clarity, and does not itself indicate the relationship between the various embodiments and / or settings discussed.

[0019] like Figures 1 to 2 As shown, the protective device for the ejector cylinder of a press machine described in the utility model includes: an ejector cylinder body protective cover 1, an ejector rod protective cover 2 fixed on the top plate surface of the ejector cylinder body protective cover 1, a guide sleeve 3 is provided at the top of the inner cavity of the ejector rod protective cover 2, a pressing plate 4 integrated with the ejector rod protective cover 2 is provided at the top end, and a sealing ring mounting portion 5 is provided in the inner cavity of the pressing plate 4; an ejector cylinder body mounting cavity 8 is provided on the ejector cylinder body protective cover 1. In this embodiment, the mixed solid condensate of the release agent and the oxide scale is isolated outside the ejector cylinder 11, and cannot cause damage to the cylinder sealing ring mounting portion and the piston rod. The performance of the ejector cylinder 11 is effectively guaranteed, and in the same time period, the maintenance frequency of maintenance workers is reduced, which also reduces the labor intensity of workers, and reduces the later maintenance cost and use cost.

[0020] In order to further improve the protection and extend the service life of the ejection cylinder, in the above embodiment, preferably: a secondary protective cover 6 of the ejection rod which is integrated therewith is fixed on the pressure plate 4.

[0021] In order to facilitate the installation and removal of the secondary protective cover 6 of the ejector rod, in the above embodiment, preferably: the pressing plate 4 and the secondary protective cover 6 of the ejector rod are fixed as a whole by screws.

[0022] In order to facilitate the installation and removal of the ejector rod protective cover 2, in the above embodiment, preferably: the ejector cylinder body protective cover 1 and the ejector rod protective cover 2 are fixed as a whole by bolts.

[0023] To facilitate the installation of the tie rod, in the above embodiment, preferably: at least two tie rod mounting holes 7 are provided on the cylinder body protective cover 1 of the ejection cylinder. In this embodiment, the tie rod mounting hole 7 is fixedly connected to the bottom of the tie rod 9 by bolts, and the top of the tie rod 9 is fixedly connected to the fixing seat 10. When in use, an ejection cylinder 11 is installed in the cylinder body mounting cavity 8 of the ejection cylinder, and the piston rod of the ejection cylinder 11 is an ejection rod 12. The top end of the ejection rod 12 passes through the pressing plate 4 and is located under the discharge hole on the fixing seat 10.

[0024] The use of the structure described in the above embodiment, through the use of our company in the past six months, shows that the sealing ring installation part and the piston rod of the ejector cylinder are not damaged, and there is no leakage. After the air tightness test, the ejector cylinder can still operate for at least one and a half years. Taking the hot forging and forging workshops of our company as an example, at least 400,000 yuan of various maintenance costs can be saved in a year.

[0025] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model rather than to limit it. Although the utility model has been described in detail with reference to the preferred embodiments, ordinary technicians in the field should understand that the technical solution of the utility model can be modified or replaced by equivalents without departing from the purpose and scope of the technical solution, which should be included in the scope of the claims of the utility model.

Claims

1. A protective device for a press ejector cylinder, characterized in that: The invention comprises a cylinder body protective cover (1), a rod protective cover (2) fixed on the top plate of the cylinder body protective cover (1), a guide sleeve (3) is arranged at the top of the inner cavity of the rod protective cover (2), a pressing plate (4) integral with the rod protective cover (2) is arranged at the top end, and a sealing ring mounting portion (5) is arranged in the inner cavity of the pressing plate (4); a cylinder body mounting cavity (8) is arranged on the cylinder body protective cover (1).

2. The protective device for the press ejector cylinder according to claim 1, characterized in that: A secondary protection cover (6) for the ejector rod which is integral with the pressing plate (4) is fixed on the pressing plate (4).

3. The protective device for the press ejector cylinder according to claim 2, characterized in that: The pressing plate (4) and the secondary protective cover (6) of the ejector rod are fixed as a whole via screws.

4. The protective device for the press ejector cylinder according to claim 1, characterized in that: The ejection cylinder body protective cover (1) and the ejection rod protective cover (2) are fixed as one body via bolts.

5. The protective device for the press ejector cylinder according to claim 1 or 4, characterized in that: At least two pull rod mounting holes (7) are arranged on the cylinder body protective cover (1) of the ejection cylinder.

Images