CN2224080Y - Improved structure of punch buffer control device - Google Patents

Abstract

An improved control device for a buffer of a punch press comprises a body provided with an upper chamber and a lower chamber which are communicated by a through hole and are outwards communicated through six connecting holes, wherein the upper connecting hole and the lower connecting hole are respectively connected with a buffer cylinder and an oil storage cylinder of the buffer; the upper containing chamber is provided with a steel ball plugging through hole; a long adjusting rod is arranged above the body and can axially move to adjust the gap between the steel ball and the through hole; the side of the body is provided with a pressure regulating valve which is connected with a corresponding connecting hole of the body, and when the through hole is blocked by the steel ball, the liquid in the upper container enters the lower container through the pressure regulating valve under the set pressure; the other side of the body is provided with a pressure relief valve which is connected with the other connecting hole, does not act when closed and enables the upper and lower chambers to be directly communicated when opened.

Description

Improved structure of punch buffer control device

The utility model relates to a buffer used in a punch press, in particular to a buffer control device for a punch press with an improved structure.

Conventional punch press buffer, as shown in Figure 1 (seeing No. 7121229 additional patent), comprises: a buffer cylinder 11; 14, located in the pipeline 13; a check valve 15, located in the pipeline 13 near the side of the oil storage cylinder 12, so that the oil can only flow from the buffer cylinder 11 to the oil storage cylinder 12; an oil return pipeline 16, connected to two A non-return valve 17 is arranged on the cylinder blocks 11, 12 and the pipeline 16, so that the oil can only flow from the oil storage cylinder 12 to the buffer cylinder 11. In the above structure, the oil in the buffer cylinder 11 must pass through the pressure regulating valve 14 to flow to the oil storage cylinder 12 , so the pressure cannot be released quickly to adjust the height of the piston 18 in the buffer cylinder 11 .

In order to overcome the above-mentioned problems, the creator of the utility model has developed the No. 75200825 patent. As shown in Figures 2, 3 and 4, a quick pressure relief valve 22 is set on the side of the pressure regulating valve 21, and the quick pressure relief valve 22 It is usually closed and does not operate. When you want to correct the mold or change the mold, you only need to open the quick relief valve 22, so that the oil in the buffer cylinder 23 can quickly flow to the oil storage cylinder 24 without passing through the pressure regulating valve 21. middle. However, in this structural setting, the pressure regulating valve is set separately from the quick pressure relief valve and the check valve, which requires additional configuration of connecting pipeline components and increases the workload of on-site connection.

The main purpose of the utility model is to provide an improved punch buffer control device with simplified components and convenient assembly.

Another object of the present invention is to provide an improved buffer control device for a punch press that can be directly cooled by water.

In order to achieve the above purpose, according to the improved structure of the press buffer control device described in the utility model, its main features include:

A main body has two chambers, upper and lower. There is a communication hole with a smaller diameter between the two chambers. There are six connection holes in total, the upper three and the lower three, which communicate with the upper and lower chambers respectively. One of them is The upper connection hole is connected with the buffer cylinder of the buffer, and the lower connection hole is connected with the oil storage cylinder of the buffer;

A steel ball, accommodated in the upper chamber, can block the communication through hole, so that the upper and lower chambers are not connected;

An adjustment piece, roughly in the shape of a long rod, is set above the body, one end extends into the upper chamber, and can be displaced along the long axis. Adjusting the distance between the bottom end and the steel ball can control the steel ball to float up under force and communicate with it. the gap between the holes;

A pressure regulating valve, located on the side of the main body, connected with the upper and lower connecting holes of the main body, used to allow the liquid in the upper chamber to pass through under the set pressure when the steel ball blocks the communicating through hole. The pressure regulating valve flows into the lower chamber;

A pressure relief valve is arranged on the side of the main body and is connected with the other upper and lower connection holes of the main body. When the pressure relief valve is closed, it does not operate, and when it is opened, the upper and lower chambers can be directly connected.

Another feature of the present invention is that cooling water channels can be provided in the control device for the circulation of cooling water for direct water cooling.

The utility model is described in detail below through the embodiments in conjunction with the accompanying drawings. In the attached picture:

Figure 1 is a schematic diagram of a conventional buffer;

Figures 2 to 4 show schematic diagrams of another conventional buffer;

Fig. 5 is the exterior perspective view of an embodiment of the present utility model;

Figure 6 is an exploded perspective view of the embodiment shown in Figure 5;

Figure 7 is a cross-sectional view taken along section line 7-7 in Figure 5;

Figure 8 is a cross-sectional view taken along section line 8-8 in Figure 5;

Fig. 9 is the use schematic diagram of the embodiment of the utility model;

10 to 14 are action explanatory diagrams of the present utility model.

As shown in Figures 5 to 8, the control device 30 of the present utility model includes:

A body 31 is rectangular and has six faces 32, 33, 34, 35, 36, 37 of front, rear, left, right, top, and bottom. The top and bottom faces 36, 37 are each provided with a non-through straight line along the same axis. Holes form upper and lower two chambers 38,39, a lesser communicating through hole 40 is established therebetween, and the front and the right side respectively establish upper and lower two connecting holes 41,42,43,44, which are respectively connected with the upper and lower two The chambers 38 and 39 communicate, the left side 34 is provided with a connection hole 45 to communicate with the upper chamber 38, and the back 33 is provided with a connection hole 46 to communicate with the lower chamber 39, and the lower chamber 39 is closed with a member 47, and in addition 33 horizontally set an impermeable water guide channel 48, establish two water guide channels 49 from the left side 34 to communicate with this water guide channel 48, and these three water guide channels 49, 48, 49 form an independent shaped channel, which is compatible with the aforementioned capacity The chamber and the connecting hole are not connected;

A steel ball 50, accommodated in the upper chamber 38, can block the through hole 40, so that the upper and lower chambers 38, 39 are not connected;

An adjustment piece 51 includes: a seat body 52, which is bolt-shaped, screwed into the opening end of the upper chamber 38, and a leak-proof ring 53 is used to stop leakage. The center of the seat body 52 is provided with a shaft hole 54, the shaft A screw hole 55 with a smaller inner diameter is established at the top of the hole 54, a ring groove is established below the shaft hole 55, and a leak-proof ring 56 is arranged inside; an adjustment rod 57 has a smooth body 58, a smaller outer diameter The threaded part 59 and a locking part 60 with a smaller outer diameter are engaged with the screw hole 55 by the threaded part 59, so that the body part 58 is accommodated in the shaft hole 54, and the leakage is stopped by the leak-proof ring 56; a knob 61, sleeved on the locking part 60, for holding to rotate the adjustment lever 57; a spring 62, sleeved on the outer end of the locking part 60 to resist the knob 61; a gasket 63, pressed on the spring 62 The other end: a screw 64 screwed into the top of the adjustment rod 57 to lock the washer 63 . With the above structure, the adjustment rod 57 can be displaced along the long axis, and the distance between the bottom end and the steel ball 50 can be adjusted to control the gap between the steel ball 50 and the through hole 40 after being lifted up by force;

A pressure regulating valve 65, comprising:

A first valve body 66 is provided with two horizontal non-through horizontal holes 67, 68 from the back to the front, and a communicating through hole 69 is set between the two horizontal holes 67, 68, and an accommodating hole is set concentrically with the through hole 69 from the top surface 70 communicates with the upper horizontal hole 67, and the first valve body is screwed on the front 32 of the body 31 with four bolts 71, so that the upper and lower horizontal holes 67, 68 are connected with the two connection holes 41, 42 of the body 31 respectively. connected, with two leak-proof rings 72 to stop leakage;

A second valve body 73 is fastened on the top surface of the first valve body 66 with four bolts 74, a first hole chamber 75 and a second hole chamber 76 are arranged along the same horizontal axis, and straight holes are arranged vertically 77 makes the first hole chamber 75 communicate with the accommodation hole 70 of the first valve body 66, and a through hole 78 with a smaller aperture is set up to make the second hole chamber 76 communicate with the accommodation hole 70. The two hole chambers 75 , 76 are provided with a communicating taper hole 79, the orifice of the second hole chamber 76 is closed with a member 80, and a leak-proof ring 97 is used to stop leakage between the second valve body 73 and the first valve body 66;

The base 81 is in the shape of a bolt, screwed into the opening of the first chamber 75, and has a screw hole 82 in the center;

A valve needle 83 with a cone-shaped head, accommodated in the first hole chamber 75, and used to seal the tapered hole 79;

A stopper 84 is accommodated in the first hole chamber 75, and a leak-proof ring 85 is sleeved thereon to stop leakage;

A spring 86 is accommodated in the first hole chamber 75, and its two ends respectively resist the valve needle 83 and the stopper 84, so that the valve needle 83 seals the tapered hole 79 with a predetermined pressure;

A screw 87 is screwed into the screw hole 82 of the seat body 81 , the inner end of which can push the stopper 84 to move inward, so as to change the elastic force of the spring 86 against the valve needle 83 ;

A floating member 88 has a round rod-shaped body 89, the body 89 protrudes a disc-shaped shoulder 90 radially in the middle, and a rod 91 with a smaller outer diameter extends from one end of the body 89, The outer end of the rod portion 91 is provided with a disc-shaped flange end portion 92, the center of the floating member 88 is provided with a shaft hole 93, and a small through hole 94 is established parallel to the axial direction on its shoulder portion 90, and the body portion 89 is connected to the axial direction. A cone surface 95 is set on the position where the rod portion 91 is handed over, and the floating member is accommodated in the accommodation hole 70 of the first valve body 66 with its shoulder portion 90, and its cone surface 95 can block the through hole 69, and its body The top end of part 89 can be accommodated in the straight hole 77 of the second valve body 73, and the floating member 88 can slide up and down along the axis of the accommodation hole 70; and

A spring 96, one end is against the floating member 88, and the other end is against the inner bottom edge of the straight hole 77 of the second valve body 73, in order to make the floating member 88 block the through hole 69 with a predetermined pressure;

A pressure relief valve 98 includes: a valve body 99 with a cavity 100 inside, two communicating holes 101, 102 located on one side of the valve body 99 to communicate with the cavity 100, a pivot hole 103 connected to the communicating hole 101 It is concentrically arranged on the other side of the valve body 99 and communicates with the cavity 100. The valve body 99 is locked on the right side 35 of the body 31 with bolts 104, and its communication holes 101, 102 communicate with the two connection holes 43, 44 respectively, with a The leak-proof ring 105 is leak-proof, and the pivot hole 103 is provided with a threaded part 106 with a smaller inner diameter at the outer end; a control rod 107 has a smooth body 108, and a smaller threaded part 109 with an outer diameter. An annular groove is provided on the part 108, and a leak-proof ring 110 is sleeved on it, and the threaded part 109 of the control rod is engaged with the threaded part 106 provided in the pivot hole 103, and its body 108 can be accommodated in the communicating hole. 101 and the pivot hole 103, the leak-proof ring 110 is set in the pivot hole 103 to stop leakage, and the body 108 can block the communication hole 101 so that the two communication holes 101, 102 are not connected.

The usage of the utility model is described in conjunction with FIGS. 9 to 14 .

Fig. 9 is a schematic diagram of the utility model installed on a punch buffer, the buffer includes: a buffer cylinder 120; an oil storage cylinder 130; The connecting hole 46 on the back side 33 of the main body 31 communicates; a flexible oil pipeline 135, one end of which is connected to the connecting hole 45 on the left side 34 of the main body 31, and the other end is connected to the buffer cylinder 120; a cooling pipe 140 is located in the storage The oil cylinder 130 is used to cool oil, and high-pressure air 145 is injected above the oil storage cylinder 130 ; the two water guide holes 49 are connected with a pipeline 136 for cooling water to flow through the body 31 for direct cooling of the body 31 .

As shown in FIG. 10 , when the seat 121 on the buffer cylinder 120 is pressed by the punch to make the piston 122 move down, the oil in the buffer cylinder 120 is pressurized and flows into the upper chamber 38 along the oil delivery pipeline 135 , and the pressure of the oil The steel ball 50 is pressed to tightly close the through hole 40 . The pressure of the oil pushes the floating member 88 upwards, so that the through hole 69 of the pressure regulating valve 65 is opened, and the oil flows into the lower chamber 39 through the lower horizontal hole 68 and the lower connecting hole 42, and then passes through the connecting hole 46 and the pipeline. 131 flows into the oil storage cylinder 130. When the floating member 88 moves up, the oil in the accommodating hole 70 of the first valve body 66 will be forced to flow into the second hole chamber 76 through the through hole 78 of the second valve body 73, and then overcome the elastic force of the spring 86 to open The valve needle 83 flows into the first chamber 75 through the tapered hole 79 , then flows into the straight hole 77 , and flows out through the shaft hole 93 of the floating member 88 . Therefore, to push the floating member 88 upwards, in addition to overcoming the elastic force of the spring 96, it is also necessary to overcome the elastic force of the spring 86. Adjust the screw rod 87 to change the position of the stopper 84, and then change the compression degree of the spring 86. By changing the back pressure of the valve needle 83, the oil flow pressure can be adjusted.

As shown in Figure 11, when the punch of the punching machine moves upward, the pressure on the piston 122 of the buffer cylinder 120 disappears, and the oil in the oil storage cylinder 130 is reversed by the pressure of the high-pressure air 145 inside it through the pipeline 131 Flow through the connection hole 46 into the lower chamber 39, at this time the floating member 88 is pushed back by the reset force of the spring 96 and closes the through hole 69 with its tapered surface 95, and the valve needle 83 is pushed back by the reset force of the spring 86 And seal the taper hole 79 with its conical surface, and the reverse oil will push the steel ball 50 upwards, so that the lower chamber 39 and the upper chamber 38 are directly connected, and the oil flows back through the connecting hole 45 and the oil pipeline 135 In the buffer cylinder 120, push the top piston 122 up.

During the above actions, the pressure relief valve 98 remains closed, that is, the communication hole 101 is closed.

As shown in Figure 12, when the mold is to be replaced or the position of the mold is to be corrected, the pressure relief valve 98 can be opened so that the upper and lower chambers 38, 39 are directly connected to the empty chamber 100 through the two communication holes 101, 102, and then The oil liquid in the buffer cylinder 120 is pressed down by the weight of the bearing seat 121 and the mold on it and returns to the oil storage cylinder 130 by means of the high-pressure air 145 pressure relief, so that the bearing seat 121 can be quickly lowered.

As shown in Figure 13, when working with a small pressure, the pressure relief valve 98 can be slightly unscrewed to form a narrow oil passage, so that when the buffer cylinder 120 is impacted, the narrow oil can be used. The liquid passage forms a small back pressure to facilitate low-pressure molding. Since the relief valve 98 can be fine-tuned to control its opening amount, different low-pressure molding conditions can be produced.

As shown in Figure 14, when the ascent speed of the buffer cylinder 120 is to be adjusted, the adjusting rod 57 of the adjusting member 51 can be adjusted to control the distance between its bottom end and the steel ball 50. If the distance is small, the floating displacement of the steel ball 50 will be small. , the opening amount of the through hole 40 is small, the oil return speed is low, and the rising speed of the buffer cylinder 120 is low. Otherwise, speed up.

In addition, the oil heats up due to flow friction during use, especially in this control device, it is more likely to heat up, so using the water guide holes 49, 48 to guide cold water through the body 31 to directly cool it, the effect is excellent.

Claims (4)

1. A punch buffer control device with an improved structure, characterized in that the control device includes: a body with upper and lower chambers, and the two chambers are communicated with a communication through hole with a smaller diameter. The upper three and the lower three have a total of six connecting holes, which are connected to the upper and lower chambers respectively, one of the upper connecting holes is connected to the buffer cylinder of the buffer, and the lower connecting hole is connected to the oil storage cylinder of the buffer; A steel ball, accommodated in the upper chamber, can block the communication through hole, so that the upper and lower chambers are not connected; An adjustment piece, roughly in the shape of a long rod, is set above the body, one end extends into the upper chamber, and can be displaced along the long axis. Adjusting the distance between the bottom end and the steel ball can control the steel ball to float up under force and communicate with it. the gap between the holes; A pressure regulating valve, located on the side of the main body, connected with the upper and lower connecting holes of the main body, used to allow the liquid in the upper chamber to pass through under the set pressure when the steel ball blocks the communicating through hole. The pressure regulating valve flows into the lower chamber; A pressure relief valve is arranged on the side of the main body and is connected with the other upper and lower connection holes of the main body. When the pressure relief valve is closed, it does not operate, and when it is opened, the upper and lower chambers can be directly connected. 2. The punch buffer control device with improved structure according to claim 1, characterized in that a water guide channel is provided in the body, and the water guide hole has two orifices for pipelines to connect cooling water to flow in and out, and the water guide The channel is an independent channel, which is not connected with the chamber and the connecting hole of the main body. 3. The punch buffer control device according to claim 1, characterized in that the pressure regulating valve includes: A first valve body has two upper and lower non-through horizontal holes communicating with the upper and lower connecting holes of the main body, and a through hole is connected between the two horizontal holes, and an accommodating hole is concentrically arranged with the through hole. The upper horizontal hole is connected; A second valve body, located above the first valve body, has a first hole chamber and a second hole chamber, and a taper hole communicates between the two hole chambers, and a straight hole is provided to connect the first hole chamber and the first valve body The accommodating hole is provided with a through hole communicating with the second chamber and the accommodating hole; a valve needle with a tapered head, accommodated in the first hole chamber, and used to seal the tapered hole; a stopper, accommodated in the first hole chamber, and can be displaced along the axial direction of the hole chamber; a spring, accommodated in the first hole chamber, and its two ends respectively resist the valve needle and the stopper, so that the valve needle seals the tapered hole with a predetermined pressure; A screw is installed in the second valve body, and one end extends into the first hole, and the length of its extension can be adjusted to push the stopper to change the compression amount of the spring; A floating member is arranged in the accommodating hole of the first valve body, and can move up and down along the axial direction of the accommodating hole, and its lower part can block the through hole of the first valve body, and its body has a shaft hole , can connect the straight hole of the second valve body with the through hole of the first valve body; One end of a spring is against the floating part, and the other end is against the second valve body, so that the floating part seals the through hole with a predetermined pressure. 4. The press buffer control device with improved structure according to claim 1, characterized in that the pressure relief valve includes: a valve body with two communication holes for communicating with the upper and lower connection holes of the body, An empty chamber is provided to communicate with the two communication holes, a pivot hole and the upper connection hole are concentrically arranged in the valve body; a control rod is arranged in the pivot hole, and one end extends into the valve body, and its length can be adjusted. It is used to block a communication hole so as to block the two communication holes.

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