CN218598498U - Double-working hydraulic hammer forging machine - Google Patents

Abstract

The utility model relates to a double-system hydraulic hammer forging machine, which comprises a hammer forging frame and a driving oil cylinder; the driving oil cylinder comprises a main oil cylinder and an auxiliary oil cylinder; the main oil cylinder comprises a cylinder body, a main piston and a main piston rod; the auxiliary oil cylinder is arranged in the output end of the main piston rod; an auxiliary piston is arranged in a cylinder cavity of the main piston rod; the auxiliary piston is downwards connected with the auxiliary piston rod; the auxiliary piston rod extends out of the cylinder cavity of the main piston rod and is partially positioned outside the bottom of the main piston rod; the bottom of the auxiliary piston rod is used as an output piston rod of a driving oil cylinder of the whole hammer forging machine and is connected with the upper anvil block. The utility model discloses a duplex system hydraulic hammer forging machine realizes the mode of duplex system on same hammer forging machine, has reduced equipment purchase, maintenance cost, and equipment shift time when also having saved different production stages has simultaneously improved production efficiency.

Description

Double-working hydraulic hammer forging machine

Technical Field

The utility model relates to a hydraulic hammer forging machine, especially drive cylinder modified hydraulic hammer forging machine.

Background

A forging hammer, which may be called hammer forging, is a forging machine that uses kinetic energy accumulated in a working portion to strike a forged part during a downward stroke to obtain plastic deformation of the forged part.

The existing hammer forging machine can be divided into an air hammer forging machine or a hydraulic hammer forging machine; air drive, because the output is fast, can be used for the hammer forging of the mode of vibration; the hydraulic drive is adopted, and the hydraulic drive can be used for high-pressure horizontal forging due to large output force; in a production site, high-pressure hammer forging is sometimes required first, and then rapid-vibration hammer forging is also required, and 2 different hammer forging machines are often required. This undoubtedly increases the cost of equipment purchase and maintenance, and also increases the time of switching production between equipment, and reduces the production efficiency.

Aiming at the defects of the prior hammer forging machine, the structural improvement is needed.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a two system hydraulic hammer forging machines can realize big pressure, two kinds of systems of quick vibration simultaneously on a hammer forging machine, can be to the different stages of hammer forging production, realize different functions on same hammer forging machine, reduced equipment purchase, maintenance cost, equipment switching time when also having saved different production stages simultaneously has improved production efficiency.

In order to achieve the purpose of the utility model, the utility model provides a double-system hydraulic hammer forging machine, which comprises a hammer forging frame and a driving oil cylinder; a driving oil cylinder is fixed at the upper part of the hammer forging rack, a piston rod extends downwards from the driving oil cylinder, and the piston rod can move up and down in a telescopic manner;

the driving oil cylinder comprises a main oil cylinder and an auxiliary oil cylinder;

the main oil cylinder comprises a cylinder body, a main piston and a main piston rod;

the hammer forging machine is characterized in that the cylinder body is fixedly arranged in the hammer forging machine frame, and a front cover and a rear cover are respectively arranged at two ends of the cylinder body to seal the inside of the cylinder body;

a main piston is arranged in the cylinder body and can move up and down along the inner wall of the cylinder body;

the main piston is downwards connected with a main piston rod, and the main piston rod penetrates through the front cover and is used as the output of the main oil cylinder;

a main pressure chamber is formed between the main piston and the rear part of the cylinder body and is connected with an external hydraulic pump station through a main pressure oil path joint;

the main piston and the front cover form a return cavity along the cylinder body and are connected with an external hydraulic pump station through a return oil way joint;

the auxiliary oil cylinder is arranged in the output end of the main piston rod; the auxiliary oil cylinder takes the main piston rod as a cylinder body;

an auxiliary piston is arranged in the cylinder cavity of the main piston rod and can move up and down along the inner wall of the cylinder cavity of the main piston rod;

the auxiliary piston is downwards connected with an auxiliary piston rod; the auxiliary piston rod extends out of the cylinder cavity of the main piston rod and is partially positioned outside the bottom of the main piston rod;

the bottom of the auxiliary piston rod is used as an output piston rod of a driving oil cylinder of the whole hammer forging machine and is connected with the upper anvil block;

the upper surface of the auxiliary piston and the upper part of the cylinder cavity of the main piston rod form a downward vibration cavity; the downward vibration cavity is connected with an external hydraulic pump station through a downward vibration oil supply pipeline;

the lower surface of the auxiliary piston and the lower part of the cylinder cavity of the main piston rod form an upward vibration cavity; the upward vibration cavity is connected with an external hydraulic pump station through an upward vibration oil supply pipeline.

As a further improvement, the vibration oil supply pipeline downwards the vibration oil supply pipeline upwards all is located the main piston rod the main piston reaches in the main pressure chamber, and pass the back lid of cylinder body links to each other with hydraulic power unit through connecting outside the cylinder body.

Furthermore, the downward vibration oil supply pipeline and the upward vibration oil supply pipeline are 2 independent oil supply pipelines and respectively and independently penetrate through the main piston rod, the main piston, the main pressure cavity and the rear cover of the cylinder body.

Furthermore, the downward vibration oil supply pipeline and the upward vibration oil supply pipeline are pipelines formed by combining a hose and a hard pipe;

hard pipes with holes serving as oil supply pipelines are arranged in the main piston rod and the main piston;

and a hose is arranged in the main pressure chamber and connected with an oil supply pipeline opening in the main piston and a connector opening on the rear cover of the cylinder body.

Furthermore, the downward vibration oil supply pipeline and the upward vibration oil supply pipeline are both hard pipes.

Still further, the upward vibrating oil supply pipeline is nested in the downward vibrating oil supply pipeline;

the main piston rod and the main piston are internally provided with holes which are used as a part of the downward vibration oil supply pipeline, and the upward vibration oil supply pipeline is nested in the downward vibration oil supply pipeline;

a hard pipe is arranged above the main piston and is used as the other part of the downward vibration oil supply pipeline, and the hard pipe penetrates through a rear cover of the cylinder body; the downward vibration oil supply pipeline stretches and retracts up and down along with the main piston and the main piston rod, and the upward vibration oil supply pipeline is nested in the upward vibration oil supply pipeline; the part of the downward vibration oil supply pipeline penetrating through the rear cover of the cylinder body is provided with a sliding seal;

the upward vibration oil supply pipeline is connected to the auxiliary piston and stretches and retracts up and down along with the auxiliary piston and the auxiliary piston rod.

Furthermore, auxiliary oil supply holes are formed in the auxiliary piston and the auxiliary piston rod;

one end of the auxiliary oil supply hole is communicated with the upward vibration cavity;

the other end of the auxiliary oil supply hole is connected with the upward vibration oil supply pipeline.

As a further improvement of the present invention, the downward vibration oil supply line is located in the main piston and the main piston rod; the bottom of the downward vibration oil supply pipeline is communicated with the downward vibration cavity; a telescopic oil supply pipe is arranged in the downward vibration oil supply pipeline;

the upper part of the telescopic oil supply pipe penetrates through the rear cover of the cylinder body and is fixed on the rear cover of the cylinder body; the top of the telescopic oil supply pipe is connected with a hydraulic pump station through a connector;

the downward vibration oil supply pipeline can perform lifting motion relative to the telescopic oil supply pipe;

a seal is arranged between the telescopic oil supply pipe and the downward vibration oil supply pipeline;

the upward vibration oil supply pipeline is positioned in a lower chamber wall body of the main piston rod;

one end of the upward vibration oil supply pipeline is communicated with the upward vibration cavity;

the other end of the upward vibration oil supply pipeline is a connector and is positioned on the outer wall or the bottom surface of the cylinder at the lower part of the main piston rod.

As a further improvement of the utility model, the downward vibration oil supply pipeline and the upward vibration oil supply pipeline are both positioned in the lower wall body of the main piston rod;

the upper part of the downward vibration oil supply pipeline is communicated with the downward vibration cavity, and the downward vibration oil supply pipeline is arranged in the lower wall body of the main piston rod and extends downwards along the main piston rod;

the interface of the downward vibration oil supply pipeline connected with the hydraulic pump station pipeline is positioned on the outer wall or the bottom surface of the cylinder at the lower part of the main piston rod;

the upper part of the upward vibration oil supply pipeline is communicated with the upward vibration cavity, and the upward vibration oil supply pipeline is arranged in the lower wall body of the main piston rod and extends downwards along the main piston rod;

and the interface of the upward vibration oil supply pipeline and the hydraulic pump station pipeline is positioned on the outer wall or the bottom surface of the cylinder at the lower part of the main piston rod.

As a further improvement of the utility model, the hydraulic pump station comprises an oil tank, an oil pump, a first electromagnetic directional valve and a second electromagnetic directional valve;

the output oil path of the oil pump is output in 2 paths, is connected to the main pressure oil path joint and the return oil path joint through first electromagnetic directional valves respectively, and is connected to the downward vibration oil supply pipeline and the upward vibration oil supply pipeline through second electromagnetic directional valves;

the first electromagnetic directional valve and the second electromagnetic directional valve are three-position two-way directional valves, and have 2 passages and 1 closed 3 working states.

The utility model discloses a duplex system hydraulic hammer forging machine during operation has big pressure work system, reaches the quick vibration work system. Under the high-pressure working condition, hydraulic oil is filled in the main pressure chamber, so that the main piston and the main piston rod move downwards, the auxiliary piston rod and the upper anvil block are further driven to move downwards together, high-pressure output is realized, and high-pressure hammer forging work is generated. Under the quick vibration work, the second electromagnetic directional valve is switched to work, hydraulic oil is alternately filled in the downward vibration cavity and the upward vibration cavity to drive the auxiliary piston, and the auxiliary piston rod and the upper anvil block are driven to rapidly move upwards and downwards together, so that the quick vibration hammer forging work is generated.

The utility model discloses a duplex system hydraulic hammer forging machine through set up vice hydro-cylinder in the output of main piston rod to it has the big pressure system simultaneously to be the hammer forging machine, and quick vibration system, thereby has overcome the single big pressure shaping at a slow speed of conventional hammer forging machine, or single quick beating fashioned application defect.

The utility model discloses a duplex system hydraulic hammer forging machine realizes the mode of duplex system on same hammer forging machine, has reduced equipment purchase, maintenance cost, and the equipment switching time when also having saved different production stages has simultaneously improved production efficiency.

Drawings

Fig. 1 is a front view of the overall structure of a dual-system hydraulic hammer forging machine of the present invention;

FIG. 2 is a side view of the overall structure of the dual-system hydraulic hammer forging machine of the present invention;

fig. 3 is a schematic view of the internal structure of the driving cylinder of the present invention 1;

fig. 4 is a schematic diagram of the internal structure of the driving cylinder of the present invention 2;

FIG. 5 is a partially enlarged schematic view of FIGS. 3 and 4;

fig. 6 is a schematic diagram 3 of the internal structure of the driving cylinder of the present invention;

fig. 7 is a schematic structural view of a third embodiment of the vibration oil supply pipeline of the driving oil cylinder according to the present invention;

fig. 8 is a schematic structural view of a fourth embodiment of the vibration oil supply line of the driving oil cylinder according to the present invention;

FIG. 9 is an enlarged partial schematic view of FIG. 8;

fig. 10 is a schematic diagram of a hydraulic system of the dual-system hydraulic hammer forging machine according to the present invention;

reference numerals: the hammer forging machine comprises a hammer forging machine frame 1, a lower anvil block 11 and an upper anvil block 12; a driving oil cylinder 2;

a cylinder 21, a front cover 22, a main piston 23, a main piston rod 24; a guide sleeve 241;

a main pressure chamber 25, a main pressure oil passage joint 26; a return chamber 27 and a return oil line joint 28;

a sub piston 33, a sub piston rod 34; a quick connect structure 341;

a downward vibration cavity 35, a downward vibration oil supply pipeline 36, and a telescopic oil supply pipe 361;

an upward vibration cavity 37, an upward vibration oil supply line 38, an auxiliary oil supply hole 381;

an oil tank 41, an oil pump 42, a pressure relay 43, and an electromagnetic relief valve 44;

a first electromagnetic directional valve 45, a second electromagnetic directional valve 46, a one-way sequence valve 47, a one-way valve 471 and an electromagnetic oil return valve 472.

Detailed Description

The following describes the embodiments of the present invention in further detail with reference to the accompanying drawings.

As shown in fig. 1 and fig. 2, the overall structure of the dual-working hydraulic hammer forging machine of the present invention is schematically illustrated, and the dual-working hydraulic hammer forging machine includes a hammer forging frame 1 and a driving cylinder 2; the hammer forging rack 1 is C-shaped, and a lower anvil block 11 is arranged at the lower part of a C-shaped inner cavity; the driving oil cylinder 2 is arranged on the C-shaped upper part of the hammer forging rack 1; an upper anvil block 12 is arranged at the bottom of the extending piston rod of the driving oil cylinder 2; the lower anvil block 11 and the upper anvil block 12 are provided with a hammering die according to requirements, and then a blank to be hammered is placed in the die of the lower anvil block 11; the upper anvil block 12 moves downwards under the driving of the driving oil cylinder 2; the upper die of the upper anvil 12 is matched with the die of the lower anvil 11 to hammer the blank.

The specific structure of the driving cylinder 2 is shown in fig. 3, and further referring to fig. 4-6, the driving cylinder 2 firstly includes a master cylinder, which includes a cylinder body 21, a front cover 22, a master piston 23, and a master piston rod 24; the cylinder body 21 is fixedly arranged in the hammer forging rack 1, a rear cover is formed at the rear part of the cylinder body 21 to seal the interior of the cylinder body, and a front cover 22 is arranged at the front part of the cylinder body 21; the cylinder body 21 is internally provided with a cylindrical cavity, a main piston 23 is installed in the cylinder body, the main piston 23 is downwards connected with a main piston rod 24, and the main piston rod 24 penetrates through the front cover 22 and serves as the output of a main oil cylinder.

A main pressure chamber 25 is formed between the main piston 23 and the rear part of the cylinder body 21 and is connected with an external hydraulic pump station through a main pressure oil path joint 26; the main hydraulic line connection 26 is preferably provided on the top of the cylinder 21, or on a rear cover (shown in the drawings in this embodiment). The main piston 23 and the front cover 22 form a return chamber 27 along the cylinder body 21 and are connected with an external hydraulic pump station through a return oil way joint 28; the return oil path joint 28 is preferably disposed at the bottom of the cylinder 21 (shown in the drawing of the present embodiment) or on the front cover 22; since the main piston rod 24 is provided in the return chamber 27, the hydraulic drive effective cross-sectional area of the return chamber 27 is smaller than that of the main pressure chamber 25.

The improvement of the utility model is that an auxiliary oil cylinder is arranged in the output end of the main piston rod 24, the auxiliary oil cylinder takes the main piston rod 24 as a cylinder body, and an auxiliary piston 33 and an auxiliary piston rod 34 are arranged in the auxiliary oil cylinder; the secondary piston 33 is positioned in the cylinder chamber of the main piston rod 2; the auxiliary piston 33 is provided with the auxiliary piston rod 34 in a downward connection manner, the auxiliary piston rod 34 extends out of the cylinder chamber of the main piston rod 24 and is partially positioned outside the bottom of the main piston rod 24, and the upper anvil 12 is installed at the bottom of the auxiliary piston rod 34 in a connection manner; the secondary piston rod 34 and the upper anvil 12 may be connected by a snap-fit structure 341, such as a dovetail groove structure as shown.

With further reference to fig. 5, the upper surface of the secondary piston 33 and the upper portion of the cylinder chamber of the primary piston rod 24 form a downward vibration chamber 35; the lower surface of the auxiliary piston 33 and the lower part of the cylinder cavity of the main piston rod 24 form an upward vibration cavity 37; the auxiliary piston rod 34 is provided in the upward vibration chamber 37, so that the hydraulic drive effective cross-sectional area of the upward vibration chamber 37 is smaller than that of the downward vibration chamber 35.

In order to facilitate the installation of the components such as the auxiliary piston 33, a guide sleeve 241 is arranged at the bottom of the inner chamber of the main piston rod 24, and the auxiliary piston rod 34 penetrates through the guide sleeve 241; the guide sleeve 241 is used as a front cover of the auxiliary oil cylinder.

The first setting embodiment of the vibration oil supply pipeline:

because the auxiliary oil cylinder is located in the main piston rod 24 and needs to move up and down along with the main piston rod 24, pipelines for providing hydraulic oil for the downward vibration cavity 35 and the upward vibration cavity 37, namely the downward vibration oil supply pipeline 36 and the upward vibration oil supply pipeline 38,2, are arranged in the main piston rod 24 and the main pressure cavity 25 and penetrate through the rear cover of the cylinder body 21, and are connected with a hydraulic pump station through a joint outside the cylinder body 21.

The downward vibration oil supply line 36 and the upward vibration oil supply line 38 may individually pass through the main piston rod 24, the main pressure chamber 25, and the rear cover of the cylinder block 21 as 2 independent oil supply lines.

The downward vibration oil supply line 36 and the upward vibration oil supply line 38 may be combined pipes of a hose and a hard pipe; that is, part of the pipeline located in the main piston rod 24 is directly opened therein as a pipeline, and part of the pipeline located in the main pressure chamber 25 can be connected by a hose.

Second installation mode of vibration oil supply pipeline:

as shown in fig. 1 to 6, the downward vibration oil supply pipeline 36 and the upward vibration oil supply pipeline 38 are hard pipes, and the upward vibration oil supply pipeline 38 is nested in the downward vibration oil supply pipeline 36; openings are formed in the main piston rod 24 and the main piston 23 to serve as a part of the downward vibration oil supply pipeline 36, and the upward vibration oil supply pipeline 38 is nested in the downward vibration oil supply pipeline; a hard pipe is arranged above the main piston 23 and is used as the other part of the downward vibration oil supply pipeline 36, the hard pipe penetrates through the rear cover of the cylinder body 21 and can move up and down in a telescopic manner along with the main piston 23 and the main piston rod 24, and the upward vibration oil supply pipeline 38 is nested in the hard pipe; the downward vibration oil supply line 36 passes through the rear cover part of the cylinder body 21 for sliding sealing treatment, so that hydraulic oil in the main pressure chamber 25 is prevented from leaking. Further, auxiliary oil supply holes 381 are formed in the auxiliary piston 33 and the auxiliary piston rod 34, one end of each auxiliary oil supply hole is communicated with the upward vibration cavity 37, the other end of each auxiliary oil supply hole is connected with the upward vibration oil supply pipeline 38, and the upward vibration oil supply pipeline 38 extends and retracts up and down along with the auxiliary piston 33 and the auxiliary piston rod 34.

The third setting embodiment of the vibration oil supply pipeline:

as shown in fig. 7, the downward vibration oil supply pipeline 36 is located in the main piston 23 and the main piston rod 24, the bottom of the downward vibration oil supply pipeline 36 is communicated with the downward vibration cavity 35, a telescopic oil supply pipe 361 is arranged in the downward vibration oil supply pipeline 36, the upper part of the telescopic oil supply pipe 361 passes through the rear cover of the cylinder body 21 and is fixed on the rear cover of the cylinder body 2, and the top of the telescopic oil supply pipe 361 is provided with a port to be connected with a hydraulic pump station; driving hydraulic oil is injected into the downward vibration cavity 35 through the telescopic oil supply pipe 361 and the downward vibration oil supply pipeline 36; when the main piston 23 and the main piston rod 24 move, the downward vibration oil supply pipeline 36 moves up and down relative to the telescopic oil supply pipe 361; a seal is provided between the telescopic oil supply pipe 361 and the downward vibration oil supply line 36 to prevent the downward vibration oil supply line 36 from communicating with the main pressure chamber 25 to cause leakage.

And the upward vibration oil supply line 38 is located at the lower chamber wall of the main piston rod 24; one end of the upward vibration oil supply pipeline 38 is communicated with the upward vibration cavity 37; the other end of the upward vibration oil supply pipeline 38 is a port, and is located on the outer wall (as shown in fig. 7) or the bottom surface (see fig. 8 and 9) of the cylinder at the lower part of the main piston rod 24.

The fourth setting implementation mode of the vibration oil supply pipeline:

as shown in fig. 8 and 9, the downward vibration oil supply line 36 and the upward vibration oil supply line 38 may be located entirely within the main piston rod 24. That is, the upper portion of the downward vibration oil supply line 36 is communicated with the downward vibration cavity 35, and the downward vibration oil supply line 36 is disposed in the main piston rod 24 and extends downward along the main piston rod 24; the upper portion of the upward vibration oil supply pipe 38 is communicated with the upward vibration cavity 37, and the upward vibration oil supply pipe 38 is disposed in the main piston rod 24 and extends downward along the main piston rod 24. Since the main piston rod 24 is in a top retracted state, the part of the front cover 22 exposed is small, so that the interfaces of the downward vibration oil supply pipeline 36 and the upward vibration oil supply pipeline 38 with the hydraulic power unit pipeline are located on the bottom surface of the main piston rod 24; of course, in the initial state, if the main piston rod 24 has a large exposed part of the front cover 22, the interfaces of the downward vibration oil supply pipeline 36 and the upward vibration oil supply pipeline 38 with the hydraulic pump station pipeline may be located on the outer wall of the exposed part of the cylinder. In the present embodiment, the downward vibration oil supply line 36 is provided separately from the upward vibration oil supply line 38.

Further combining with the hydraulic schematic diagram shown in fig. 10, the hydraulic pump station includes an oil tank 41 and an oil pump 42; the output oil path of the oil pump 42 is provided with a pressure relay 43 and an electromagnetic overflow valve 44, so that the pressure relay 43 and the electromagnetic overflow valve 44 can be activated to return oil when the system does not need oil transportation and the pressure is too high, thereby ensuring the safety of the system. The output oil path of the oil pump 42 is divided into 2 paths for output, and is respectively connected with a first electromagnetic directional valve 45 connected to the main pressure oil path joint 26 and the return oil path joint 28, and a second electromagnetic directional valve 46 connected to the downward vibration oil supply pipeline 36 and the upward vibration oil supply pipeline 38; a one-way sequence valve 47 is further arranged between the return oil way joint 28 and the first electromagnetic reversing valve 45, and the one-way sequence valve 47 is formed by a one-way valve 471 and an electromagnetic oil return valve 472 in parallel.

The first electromagnetic directional valve 45 and the second electromagnetic directional valve 46 are three-position two-way directional valves, and have three states, i.e., 2 passages and 1 closed state.

The utility model discloses a duplex system hydraulic hammer forging machine during operation has following working process:

working process 1, high-pressure working;

the first electromagnetic directional valve 45 is located in the right path, so that the output of the oil pump 42 is communicated with the main pressure oil path joint 26 and the main pressure chamber 25;

the electromagnetic oil return valve 472 is kept open, so that the return oil path joint 28 and the return chamber 27 are communicated with the oil tank 41 through an oil return line;

the second electromagnetic directional valve 46 is in the intermediate closed state, so that the downward vibration oil supply line 36 and the upward vibration oil supply line 38 are kept closed;

at this time, the oil pump 42 injects hydraulic oil into the main pressure chamber 25, pushes the main piston 23 and the main piston rod 2 downward, and further drives the auxiliary piston 33, the auxiliary piston rod 34, and the upper anvil 12 downward together.

At this time, the downward vibration chamber 35 and the upward vibration chamber 37 are kept closed, so that the output pressure of the main piston rod 24 can be completely transmitted to the auxiliary piston 33, the auxiliary piston rod 34 and the upper anvil 12, and the effective cross-sectional area of the hydraulic drive of the main pressure chamber 25 is large, so that the upper anvil 12 is finally driven to output with a large pressure to perform a hammer forging operation.

During the downward movement of the main piston 23, the volume of the return chamber 27 is reduced, and the hydraulic oil in the return chamber flows back to the oil tank 41 through the return oil path joint 28 and the electromagnetic oil return valve 472.

2, performing quick vibration processing;

in the case of working process 1, when the upper anvil 12 is located near the lower anvil 11, the fast vibration process is required, i.e., the process of working process 2 is entered.

The first electromagnetic directional valve 45 is in a middle closed state, so that the main pressure oil path joint 26 and the return oil path joint 28 are both kept closed; namely, the main piston 23 and the main piston rod 24 keep the output position unchanged;

solenoid spill valve 472 can remain closed;

the second electromagnetic directional valve 46 is activated to switch between the left passage and the right passage;

(1) The second electromagnetic directional valve 46 is located in the left passage, and makes the output of the oil pump 42 communicate with the upward vibration oil supply line 38 and the upward vibration chamber 37; the downward vibration oil supply pipeline 36 and the downward vibration cavity 35 are communicated with the oil tank 41 through an oil return pipeline;

at this time, the oil pump 42 injects hydraulic oil into the upward vibration chamber 37, and pushes the auxiliary piston 33 to drive the auxiliary piston rod 34 and the upper anvil 12 upward together.

At this time, the volume of the downward vibration chamber 35 is reduced, and the hydraulic oil therein flows back to the oil tank 41 through the downward vibration oil supply line 36.

(2) The second electromagnetic directional valve 46 is located in the right passage, and makes the output of the oil pump 42 communicate with the downward vibration oil supply line 36 and the downward vibration chamber 35; the upward vibration oil supply pipeline 38 and the upward vibration cavity 37 are communicated with the oil tank 41 through an oil return pipeline;

at this time, the oil pump 42 injects hydraulic oil into the downward vibration chamber 35, and pushes the auxiliary piston 33 to drive the auxiliary piston rod 34 and the upper anvil 12 downward together.

At this time, the volume of the upward vibration chamber 37 is reduced, and the hydraulic oil therein flows back to the oil tank 41 through the upward vibration oil supply line 38.

Because the effective cross-sectional areas of the hydraulic driving of the downward vibration cavity 35 and the upward vibration cavity 37 are small, the hydraulic oil output by the oil pump 4 will quickly fill the cavities, i.e. the auxiliary piston rod 34 and the upper anvil 12 will be driven to move upward and downward together quickly along with the quick reversing action of the electromagnetic valves at the two ends of the second electromagnetic directional valve 46, thereby generating the quick vibration hammer forging operation.

Working process 3, return stroke;

after the work is finished, resetting is needed, namely, the work in the working process 3 is carried out.

The first electromagnetic directional valve 45 is positioned on the left passage, so that the main pressure oil path joint 26 and the main pressure chamber 25 are communicated with the oil tank 41 through an oil return line;

the electromagnetic oil return valve 472 is kept open, so that the output of the oil pump 42 is communicated with the return oil way joint 28 and the return chamber 27 through the passage of the first electromagnetic directional valve 45 and the one-way valve 471;

the state of the second electromagnetic directional valve 46 is maintained (any of the left passage, the intermediate closed state, and the right passage) so that the relative positions of the auxiliary piston 33 and the auxiliary piston rod 34 in the main piston rod 24 are maintained;

at this time, the oil pump injects hydraulic oil into the return chamber 27 to push the main piston 23 and the main piston rod 24 to move upward, and further drives the auxiliary piston 33, the auxiliary piston rod 34 and the upper anvil block 12 to move upward together, so as to realize the reset of the whole hammer forging machine.

While the preferred embodiments of the present invention have been described in detail, it will be understood by those skilled in the art that the invention is not limited to the embodiments disclosed, but is capable of numerous equivalents and substitutions without departing from the spirit of the invention, and such equivalents and substitutions are intended to be included within the scope of the invention as defined by the appended claims.

Claims (10)

1. The double-working hydraulic hammer forging machine comprises a hammer forging machine frame and a driving oil cylinder; a driving oil cylinder is fixed at the upper part of the hammer forging rack, a piston rod extends downwards from the driving oil cylinder, and the piston rod can move up and down in a telescopic manner;

the hydraulic system is characterized in that the driving oil cylinder comprises a main oil cylinder and an auxiliary oil cylinder;

the main oil cylinder comprises a cylinder body, a main piston and a main piston rod;

the hammer forging machine is characterized in that the cylinder body is fixedly arranged in the hammer forging machine frame, and a front cover and a rear cover are respectively arranged at two ends of the cylinder body to seal the inside of the cylinder body;

a main piston is arranged in the cylinder body and can move up and down along the inner wall of the cylinder body;

the main piston is downwards connected with a main piston rod, and the main piston rod penetrates through the front cover and is used as the output of the main oil cylinder;

a main pressure chamber is formed between the main piston and the rear part of the cylinder body and is connected with an external hydraulic pump station through a main pressure oil path joint;

the main piston and the front cover form a return cavity along the cylinder body and are connected with an external hydraulic pump station through a return oil way joint;

the auxiliary oil cylinder is arranged in the output end of the main piston rod; the auxiliary oil cylinder takes the main piston rod as a cylinder body;

an auxiliary piston is arranged in the cylinder cavity of the main piston rod and can move up and down along the inner wall of the cylinder cavity of the main piston rod;

the auxiliary piston is downwards connected with an auxiliary piston rod; the auxiliary piston rod extends out of the cylinder cavity of the main piston rod and is partially positioned outside the bottom of the main piston rod;

the bottom of the auxiliary piston rod is used as an output piston rod of a driving oil cylinder of the whole hammer forging machine and is connected with the upper anvil block;

the upper surface of the auxiliary piston and the upper part of the cylinder cavity of the main piston rod form a downward vibration cavity; the downward vibration cavity is connected with an external hydraulic pump station through a downward vibration oil supply pipeline;

the lower surface of the auxiliary piston and the lower part of the cylinder cavity of the main piston rod form an upward vibration cavity; the upward vibration cavity is connected with an external hydraulic pump station through an upward vibration oil supply pipeline.

2. The dual-system hydraulic hammer forging machine according to claim 1, wherein the downward vibration oil supply line and the upward vibration oil supply line are located in the main piston rod, the main piston, and the main pressure chamber, penetrate through a rear cover of the cylinder body, and are connected to a hydraulic pump station through a joint outside the cylinder body.

3. The dual-system hydraulic hammer forging machine according to claim 2, wherein the downward vibration oil supply line and the upward vibration oil supply line are 2 independent oil supply lines which individually pass through the main piston rod, the main piston, the main pressure chamber, and the rear cover of the cylinder block, respectively.

4. The dual-system hydraulic hammer forging machine according to claim 3, wherein the downward vibration oil supply line and the upward vibration oil supply line are combined flexible pipe and hard pipe lines;

hard pipes with holes serving as oil supply pipelines are arranged in the main piston rod and the main piston;

and a hose is arranged in the main pressure chamber and connected with an oil supply pipeline opening in the main piston and a connector opening on the rear cover of the cylinder body.

5. The dual-system hydraulic hammer forging machine according to claim 2, wherein the downward vibration oil supply line and the upward vibration oil supply line are each hard pipes.

6. The dual system hydraulic hammer forging machine of claim 5, wherein the upward vibration oil supply line is nested within the downward vibration oil supply line;

the main piston rod and the main piston are internally provided with holes which are used as a part of the downward vibration oil supply pipeline, and the upward vibration oil supply pipeline is nested in the downward vibration oil supply pipeline;

a hard pipe is arranged above the main piston and is used as the other part of the downward vibration oil supply pipeline, and the hard pipe penetrates through a rear cover of the cylinder body; the downward vibration oil supply pipeline stretches and retracts up and down along with the main piston and the main piston rod, and the upward vibration oil supply pipeline is nested in the upward vibration oil supply pipeline; the part of the downward vibration oil supply pipeline penetrating through the rear cover of the cylinder body is provided with a sliding seal;

the upward vibration oil supply pipeline is connected to the auxiliary piston and stretches and retracts up and down along with the auxiliary piston and the auxiliary piston rod.

7. The dual-system hydraulic hammer forging machine according to claim 2, wherein auxiliary oil supply holes are provided in the auxiliary piston and the auxiliary piston rod;

one end of the auxiliary oil supply hole is communicated with the upward vibration cavity;

the other end of the auxiliary oil supply hole is connected with the upward vibration oil supply pipeline.

8. The dual-system hydraulic hammer forging machine according to claim 1, wherein the downward vibration oil supply line is located in the main piston and the main piston rod; the bottom of the downward vibration oil supply pipeline is communicated with the downward vibration cavity; a telescopic oil supply pipe is arranged in the downward vibration oil supply pipeline;

the upper part of the telescopic oil supply pipe penetrates through the rear cover of the cylinder body and is fixed on the rear cover of the cylinder body; the top of the telescopic oil supply pipe is connected with a hydraulic pump station through a connector;

the downward vibration oil supply pipeline can perform lifting motion relative to the telescopic oil supply pipe;

a seal is arranged between the telescopic oil supply pipe and the downward vibration oil supply pipeline;

the upward vibration oil supply pipeline is positioned in a lower chamber wall body of the main piston rod;

one end of the upward vibration oil supply pipeline is communicated with the upward vibration cavity;

the other end of the upward vibration oil supply pipeline is a connector and is positioned on the outer wall or the bottom surface of the cylinder at the lower part of the main piston rod.

9. The dual-system hydraulic hammer forging machine according to claim 1, wherein the downward vibration oil supply line and the upward vibration oil supply line are located in a lower wall body of the main piston rod;

the upper part of the downward vibration oil supply pipeline is communicated with the downward vibration cavity, and the downward vibration oil supply pipeline is arranged in the lower wall body of the main piston rod and extends downwards along the main piston rod;

the connector of the downward vibration oil supply pipeline connected with the hydraulic pump station pipeline is positioned on the outer wall or the bottom surface of the cylinder at the lower part of the main piston rod;

the upper part of the upward vibration oil supply pipeline is communicated with the upward vibration cavity, and the upward vibration oil supply pipeline is arranged in the lower wall body of the main piston rod and extends downwards along the main piston rod;

and the interface of the upward vibration oil supply pipeline and the hydraulic pump station pipeline is positioned on the outer wall or the bottom surface of the cylinder at the lower part of the main piston rod.

10. The dual-system hydraulic hammer forging machine according to claim 1, wherein the hydraulic pump station comprises an oil tank, an oil pump, a first electromagnetic directional valve and a second electromagnetic directional valve;

the output oil path of the oil pump is output in 2 paths, is connected to the main pressure oil path joint and the return oil path joint through first electromagnetic directional valves respectively, and is connected to the downward vibration oil supply pipeline and the upward vibration oil supply pipeline through second electromagnetic directional valves;

the first electromagnetic directional valve and the second electromagnetic directional valve are three-position two-way directional valves, and have 2 passages and 1 closed 3 working states.

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