Hydraulic drawing device of press machine

Abstract

The utility model discloses a hydraulic drawing device of a press machine, which comprises the press machine with a draw-in bolt, the draw-in bolt can penetrate through a cross beam on the press machine to extend and be arranged outside the cross beam, a draw-in nut is arranged on the draw-in bolt extending and arranged outside the cross beam, and the draw-in nut can abut against the upper surface of the cross beam. A supporting column is further fixedly arranged on the cross beam, a cylinder body is fixedly arranged at the other end of the supporting column, a piston matched with the cylinder body is arranged on the cylinder body, the piston is fixedly arranged on the tension bolt, a relatively sealed hydraulic cavity is arranged and defined between the piston and the cylinder body, and the hydraulic cavity is communicated with an oil inlet hole formed in the cylinder body. The utility model has the main beneficial effects that the tensioning nut is directly propped against the cross beam, so that the contact area between the tensioning nut and the cross beam can be increased to the greatest extent, the stress is dispersed, the situation that the tensioning nut is damaged by pressing or deformed is avoided, and the service life is prolonged.

Description

Technical Field

[0001] The utility model relates to a bolt stretching device for a press, and more particularly to a hydraulic elongator for a press. Background Art

[0002] The body is a basic component of a press, and all components are installed on the body, which places high requirements on the stiffness and stability of the body. Among them, the body of a closed mechanical press mainly has two structural forms: an integral body and a split combined body. At present, medium and large-sized mechanical presses at home and abroad all adopt the split combined type. This structure is convenient for processing and transportation, and the bolt stretching device is an important tooling component in the combined body.

[0003] As disclosed in the authorized publication number 209756199U, a bolt hydraulic stretching mechanism for a press that saves materials is disclosed, including a hydraulic cylinder body. A piston rod is installed in the hydraulic cylinder body. The lower end of the piston rod is made into a T shape, and an oil inlet hole is provided on the left side. The inner side of the piston rod is threaded; Four sealing O-rings are installed between the hydraulic cylinder body and the piston rod. Four pressing plates are evenly distributed at the upper ends of the piston rod and the hydraulic cylinder body to connect them together; The piston rod and the pressing plate are fixedly connected with bolts and spring washers. The hydraulic cylinder body and the pressing plate are connected together with screws and hexagon nuts. A flat washer is installed between the pressing plate and the hydraulic cylinder body; A hydraulic cavity is formed between the two shoulders of the hydraulic cylinder body and the piston rod, and the hydraulic cavity is communicated with the oil inlet hole. However, after the tension bolt is stretched by this mechanism, it is fixed by inserting a flat washer into the gap. This operation method is complex and requires inserting multiple gaskets into the gap, resulting in partial retraction of the stretched tension bolt, affecting the stretching accuracy. In addition, the contact area between the gasket and the press die is small, the force is concentrated, and the gasket is prone to being damaged or deformed under pressure, which not only affects the stretching accuracy but also poses a greater safety hazard. Summary of the Utility Model

[0004] The purpose of the utility model is to overcome the deficiencies of the prior art and provide a hydraulic elongator for a press.

[0005] The purpose of the utility model is achieved through the following technical solutions:

[0006] A hydraulic elongator for a press, including a press with a tension bolt. The tension bolt can penetrate through the cross beam on the press and extend to the outside of the press, and a tension nut is provided on the tension bolt extending to the outside of the cross beam. The tension nut can abut against the upper surface of the cross beam; A support column is also fixedly installed on the cross beam, and the other end of the support column is fixedly installed with a cylinder body. A piston adapted to the cylinder body is provided on the cylinder body. The piston is fixedly installed on the tension bolt. A relatively sealed hydraulic cavity is defined and configured between the piston and the cylinder body, and the hydraulic cavity is communicated with an oil inlet hole opened on the cylinder body.

[0007] Preferably, a clamping groove is formed in the piston, the clamping groove is located on both sides of the hydraulic cavity, and a high-pressure O-ring seal is arranged in the clamping groove.

[0008] Preferably, a high-pressure retaining ring is further arranged in the clamping groove, and the high-pressure retaining ring is located outside the high-pressure O-ring seal.

[0009] Preferably, an air vent hole is further formed in the cylinder block, and the air vent hole is communicated with the hydraulic cavity; both the air vent hole and the oil inlet hole can be sealed by their respective mating plugs.

[0010] Preferably, a hydraulic pump is further included, and the hydraulic pump is connected to the oil inlet hole through a high-pressure hose.

[0011] Preferably, four support columns are fixedly arranged on the cross beam, and the support columns are evenly distributed around the tension bolt.

[0012] The beneficial effects of the present utility model are mainly reflected in:

[0013] 1. By directly abutting the tension nut against the cross beam, the contact area between the tension nut and the cross beam can be maximally increased, so that the stress is dispersed, avoiding the occurrence of damage or deformation of the tension nut, and prolonging the service life. In addition, the situation of the tension bolt retracting can also be avoided, improving the accuracy of elongation. This operation is safe, reliable, has high stability, and has wide applicability.

[0014] 2. The setting of the high-pressure O-ring seal can prevent the hydraulic oil in the hydraulic cavity from leaking. In addition, the high-pressure retaining ring can limit the high-pressure O-ring seal, avoiding the situation that the high-pressure O-ring seal is deformed too much and extruded, and preventing the hydraulic oil from leaking.

[0015] 3. After the work is completed, using plugs to block the air vent hole and the oil inlet hole can prevent sundries or dust from entering, ensuring the cleanliness and service life of the forging machine. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The technical solution of the present utility model will be further described below in conjunction with the drawings:

[0017] Figure 1 : Three-dimensional view of the preferred embodiment of the present utility model;

[0018] Figure 2 : Cross-sectional view of the preferred embodiment of the present utility model. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0019] The following will describe the present utility model in detail in conjunction with the specific embodiments shown in the accompanying drawings. However, these embodiments are not limited to the present utility model, and any structural, method, or functional changes made by those of ordinary skill in the art based on these embodiments are included in the protection scope of the present utility model.

[0020] In the description of the present utility model, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection", and "coupling" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood through specific situations.

[0021] The present utility model will be described in detail below with reference to the accompanying drawings and in conjunction with embodiments.

[0022] As Figures 1 to 2 shown, the present utility model discloses a hydraulic stretching device for a press, including a press having a tension bolt 1. The structure of the press is prior art and not the key point of protection of the present utility model, so it will not be elaborated here too much.

[0023] The tension bolt 1 can penetrate through the cross beam 2 on the press and extend to the outside thereof, and a tension nut 3 is provided on the tension bolt 1 extending to the outside of the cross beam 2. The tension nut 3 can abut against the upper surface of the cross beam 2. Compared with a hydraulic stretching mechanism for a press bolt that saves materials disclosed in the prior art 209756199U, the tension nut 3 abuts against the cross beam 2, which can maximize the contact area between the tension nut 3 and the cross beam 2, disperse the stress, avoid the situation of damaging or deforming the tension nut 3, and extend the service life. In addition, when the tension nut 3 is screwed on the tension bolt, the situation of the tension bolt retracting can be avoided, improving the accuracy of stretching. This operation is safe, reliable, has high stability, and has a wide range of applicability.

[0024] In this preferred embodiment, a manual hole is further opened on the outer circumferential surface of the tension nut 3, which increases the convenience of adjustment or operation and greatly improves the work efficiency.

[0025] A support column 4 is also fixedly provided on the cross beam 2. Specifically, four support columns 4 are fixedly provided on the cross beam 2, and the support columns 4 are evenly distributed around the tension bolt 1. Of course, other numbers of support columns 4, such as 8, etc., can also be provided on the cross beam 2, and can be adjusted according to actual needs, which all belong to the protection scope of the present utility model and will not be limited too much here.

[0026] The other end of the support column 4 is fixed with a cylinder body 5, on which a piston 6 adapted thereto is provided, and a guide bolt may also be provided on the cylinder body, on which the piston 6 moves up and down. In this preferred embodiment, the piston 6 is fixed on the tensioning bolt 1, and a relatively sealed hydraulic chamber 7 is defined between the piston 6 and the cylinder body 5, and the hydraulic chamber 7 is connected to an oil inlet hole 51 provided on the cylinder body 5. When hydraulic oil is injected into the hydraulic chamber 7 through the oil inlet hole 51, the piston 6 moves upward under the action of the hydraulic oil, thereby driving the tensioning bolt 1 to move upward, thereby lengthening the tensioning bolt 1. This operation is convenient and stable, and is easy to disassemble, replace and repair, greatly improving work efficiency.

[0027] The piston 6 is provided with a slot 61, and the number of the slots 61 can also be set to other numbers, such as Figure 2 As shown, the piston 6 is provided with two said slots 61, which can play a double protective role. Each piston 6 is provided with a slot 61, and the slots 61 are located on both sides of the hydraulic chamber 7. A high-pressure O-type sealing ring 62 is provided in the slot 61, and the setting of the high-pressure O-type sealing ring can prevent the hydraulic oil in the hydraulic chamber from leaking out. A high-pressure retaining ring 63 is also provided in the slot 61, and the high-pressure retaining ring 63 is located on the outside of the high-pressure O-type sealing ring 62. The high-pressure retaining ring can limit the high-pressure O-type sealing ring, prevent the high-pressure O-type sealing ring from being deformed too much and squeezed out, and prevent the hydraulic oil from leaking out.

[0028] The cylinder body 5 is also provided with an air vent hole 52, which is in communication with the hydraulic chamber 7; the air vent hole 52 and the oil inlet hole 51 can be sealed by the matching plug 53. After use, the high-pressure hose 81 is removed, and the air vent hole 52 and the oil inlet hole 51 are blocked with the plug 53 to prevent debris or dust from entering, thereby ensuring the cleanliness and service life of the puller.

[0029] The utility model further comprises a hydraulic pump 8, and the hydraulic pump 8 is connected to the oil inlet 51 through a high-pressure hose 81. Of course, the hydraulic pump 8 and the oil inlet 51 can also be connected in other ways, which all belong to the protection scope of the utility model.

[0030] The working process of the utility model is briefly described below: the hydraulic pump 8 is started, and hydraulic oil is injected into the hydraulic chamber 7 through the high-pressure hose 81 and the oil inlet hole 51 in turn. The piston 6 moves upward under the action of the hydraulic oil, and the piston 6 drives the tension bolt 1 fixed thereto to move upward synchronously until it moves to a predetermined position. At this time, the tension nut 3 is screwed so that the tension nut 3 abuts against the upper surface of the crossbeam 2, completing the extension of the tension bolt.

[0031] After the above operations are completed, the support columns 4, pistons, cylinder blocks, etc. can be removed for recycling, which can minimize costs and reduce waste of resources.

[0032] It should be understood that although this specification is described in terms of embodiments, not every embodiment contains only one independent technical solution. This narrative style of the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

[0033] The series of detailed descriptions listed above are only specific descriptions of the feasible embodiments of the present invention, and they are not intended to limit the protection scope of the present invention. Any equivalent embodiments or modifications made without departing from the technical spirit of the present invention should be included in the protection scope of the present invention.

Claims

1. Hydraulic forging press stretcher, including a forging press with a tension bolt (1), characterized in that: The tension bolt (1) can penetrate through the cross beam (2) on the press and extend outside it, and a tension nut (3) is provided on the tension bolt (1) extending outside the cross beam (2), and the tension nut (3) can abut against the upper surface of the cross beam (2); a support column (4) is also fixedly provided on the cross beam (2), the other end of the support column (4) is fixedly provided with a cylinder block (5), a piston (6) adapted to it is provided on the cylinder block (5), the piston (6) is fixedly provided on the tension bolt (1), a relatively sealed hydraulic chamber (7) is defined and configured between the piston (6) and the cylinder block (5), and the hydraulic chamber (7) communicates with an oil inlet hole (51) opened on the cylinder block (5).

2. The hydraulic stretcher for a press according to claim 1, characterized in that: A clamping groove (61) is opened on the piston (6), the clamping groove (61) is located on both sides of the hydraulic chamber (7), and a high-pressure O-ring seal (62) is provided in the clamping groove (61).

3. The hydraulic forging manipulator according to claim 2, wherein: A high-pressure retaining ring (63) is also provided in the clamping groove (61), and the high-pressure retaining ring (63) is located outside the high-pressure O-ring seal (62).

4. The hydraulic forging press according to claim 1, characterized in that: An air vent hole (52) is also opened on the cylinder block (5), and the air vent hole (52) communicates with the hydraulic chamber (7); both the air vent hole (52) and the oil inlet hole (51) can be sealed by their respective adapted plugs (53).

5. The hydraulic stretcher for a press according to claim 1, characterized in that: It further includes a hydraulic pump (8), and the hydraulic pump (8) is connected to the oil inlet hole (51) through a high-pressure hose (81).

6. The hydraulic cogging device of the press according to claim 1, characterized in that: Four of the support columns (4) are fixedly provided on the cross beam (2), and the support columns (4) are evenly distributed around the tension bolt (1).

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