CN110640066A - Hydraulic ejection lever type clamping device of mold and clamping and mold changing method - Google Patents
Hydraulic ejection lever type clamping device of mold and clamping and mold changing method Download PDFInfo
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- CN110640066A CN110640066A CN201910898872.7A CN201910898872A CN110640066A CN 110640066 A CN110640066 A CN 110640066A CN 201910898872 A CN201910898872 A CN 201910898872A CN 110640066 A CN110640066 A CN 110640066A
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- lever
- base
- disc spring
- hydraulic
- die
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
- B21J13/00—Details of machines for forging, pressing, or hammering
- B21J13/02—Dies or mountings therefor
- B21J13/03—Die mountings
Abstract
The invention relates to a hydraulic ejection lever type clamping device of a die and a clamping and die changing method. A disc spring return hydraulic cylinder of the hydraulic system is fixed in the base, and the lower part of a disc spring return hydraulic cylinder body is provided with an oil port communicated with an oil hole formed in the base; the tail part of the lever is arranged above the piston, and the hook part at the front end is arranged in the wedge-shaped groove of the base. The rear stop block of the limiting system is fixed on the base, and the rear cushion plate is fixed on the rear stop block. When the back cushion plate is clamped, the disc spring returns to the hydraulic cylinder for oil feeding, the piston upwards rotates the lever, and the mold is pushed to enable the back cushion plate to be compressed. When the mould is loosened, the hydraulic cylinder releases pressure, the disc spring resilience force pushes the piston to move downwards, so that the lever loses ejection force and is loosened with the mould, the lever is slid to the position of the vertical opening of the lever supporting block and is moved out, and the mould can be pulled out from the front and is changed. The device has scientific structure and simple and convenient operation. The hydraulic locking and quick die change are convenient and labor-saving, and the invention is suitable for dies with various similar structures.
Description
Technical Field
The invention relates to a hydraulic clamping device, in particular to a hydraulic ejection lever type clamping device of a mold and a clamping and mold changing method.
Background
At present, most of the locking modes of a die and a die holder of a domestic hot die forging press still adopt a mode of key and key groove matched positioning and bolt fastening, and in the working state that the die is subjected to long-term up-and-down forging, the bolt is easy to loosen, so that the quality problem of a forged piece caused by unclamping of the die is avoided, the working is required to be suspended at regular time, the tightness degree of the bolt is manually checked, and the production efficiency is reduced. When the mold is replaced by the locking mode, all the fixing bolts need to be loosened, and all the bolts need to be fastened after the mold is replaced, so that the work repetition is large, and the time and the labor are consumed.
CN207971328U discloses ejecting device is used in mould processing, the device comprises a device body, the device body includes the protective housing, the inside lower extreme fixedly connected with pneumatic cylinder of protective housing, the upper end fixedly connected with connection pad of pneumatic cylinder, the connection pad is equipped with the recess, be equipped with the internal thread in the recess, can dismantle on the recess and be connected with the stand, the lower extreme of stand is equipped with the external screw thread, the stand passes through the internal thread threaded connection that is equipped with in external screw thread and the recess, the equal fixedly connected with fixed block in both sides below of connection pad, the inboard middle part fixedly connected with fixed disk of protective housing, be equipped with the through-hole on the fixed disk. The ejection device is mainly used for ejecting the tank body mould.
Disclosure of Invention
The invention aims to provide a hydraulic ejection lever type clamping device which is scientific in structure, simple and convenient to operate, capable of avoiding bolt loosening, reducing die change time and improving production efficiency and applicable to dies with various similar structures, and a clamping and die change method.
The implementation mode of the invention is as follows: a hydraulic ejection lever type clamping device of a mold is characterized in that a base is provided with a hydraulic system and a limiting system at the same time;
a cylinder body of a disc spring return hydraulic cylinder of the hydraulic system is fixed in the base, and a cylinder body cover plate is fixed on the base through a fifth bolt; a disc spring for limiting the upper section of the piston is arranged in the disc spring return hydraulic cylinder and is arranged in an inner hole of a disc spring base; the lower part of the disc spring return hydraulic cylinder body is provided with an oil port communicated with an oil hole opened in the base; the piston of the disc spring return hydraulic cylinder is positioned below the tail part of the lever, the front end of the lever is in a hook shape, and the hook part is arranged in the wedge-shaped groove of the base and hooks the hook groove of the lever supporting block; the lever supporting block is fixed on the base through a first bolt, and the key is fixed at the bottom of the wedge-shaped groove of the base through a second bolt; the key is provided with an end face which is contacted with the lower part of the lever supporting block;
and a rear stop block of the limiting system is fixed on the base through a third bolt, and an inverted L-shaped rear cushion plate is fixed on the rear stop block through a fourth bolt.
The method for clamping and replacing the die by using the hydraulic ejection lever type clamping device comprises the following specific steps:
1) fixing the disc spring return hydraulic cylinder on the base by using a fifth bolt, communicating a lower oil hole formed in the base with a lower oil port of the hydraulic cylinder body, and placing the disc spring in an inner hole of the disc spring base and on the upper part of the piston;
2) fixing the lever supporting block and the key in the wedge-shaped groove of the base by using a first bolt and a second bolt respectively, wherein one end face of the key is in contact with the lower part of the lever supporting block; fixing the inverted-L-shaped rear block on the base by using a third bolt and fixing the inverted-L-shaped rear block on the rear block by using a fourth bolt;
3) the die is placed between the hydraulic system and the limiting system, and after the die is placed, the lever is placed into the wedge-shaped groove of the base from the vertical opening of the lever supporting block and slides to a clamping position, namely the axis position of the hydraulic cylinder; oil is fed from the lower oil hole and pressurized, hydraulic oil enters the disc spring return hydraulic cylinder body, and pushes the piston to move upwards to be contacted with the tail part of the lever, so that the lever rotates by taking the rotation support position of the front lever as a rotation reference point; the front end hook of the lever is contacted with the front side inclined surface of the die and pushes the die to move backwards to contact the inverted L-shaped rear cushion block; when the piston moves to the top dead center, the locking effect on the die is achieved;
at the moment, the distance between the upper part of the disc spring base and the bottom of the cylinder body cover plate needs to be larger than zero so as to ensure that the upward pressure of the hydraulic cylinder is not blocked by the bottom of the cylinder body cover plate, and the disc spring is in a compressed state and used for returning the piston when the disc spring returns the hydraulic cylinder for pressure relief; the short edge of the inverted L-shaped rear cushion block is used for assisting in pressing the rear side of the die;
4) and (3) releasing pressure from the lower oil hole, pushing the piston to move downwards by the disc spring through resilience force, loosening the tail part of the lever, enabling the lever not to be stressed at the moment, sliding the lever to the vertical opening of the lever supporting block, moving out the lever, pulling the die forwards to perform die change operation, wherein the front side of the die is not shielded.
The device of the invention has scientific structure and simple and convenient operation. The invention avoids the problem of bolt loosening of the die in a long-term working state, not only provides guarantee for the stability of the quality of the forge piece, but also reduces the time for replacing the die, reduces the labor consumption and improves the production efficiency.
The invention can realize hydraulic locking and quick die change effects and is suitable for dies with various similar structures.
Drawings
FIG. 1 is a schematic structural view of the apparatus of the present invention,
figure 2 is a top view of the structure of the device of the present invention,
figure 3 is a view from a-a of figure 2,
FIG. 4 is a view showing the lever of the present invention moved to a position at the vertical opening of the lever support block,
figure 5 is a cross-sectional view taken along line B-B of figure 4,
figure 6 is a top view of the lever support block structure of the present invention,
figure 7 is a view in the direction C-C of figure 6,
fig. 8 is a view from direction D-D of fig. 6.
Detailed Description
The present invention is described in detail below with reference to the accompanying drawings.
Referring to fig. 1 and 2, a hydraulic ejection lever type clamping device of a mold is characterized in that a hydraulic system is arranged on one side of a base 1, and a limiting system is arranged on the other side of the base.
Referring to fig. 1 and 3, a cylinder body of a disc spring return hydraulic cylinder 3 of a hydraulic system is fixed in a base 1, and a cylinder body cover plate 3-5 is fixed on the base through a bolt five 3-6. The disc spring return hydraulic cylinder is internally provided with a disc spring 3-4 for limiting the upper section of the piston 3-2, and the disc spring 3-4 is arranged on a disc spring base 3-3. The lower part of the disc spring return hydraulic cylinder body 3-1 is provided with an oil port communicated with the oil hole 2 opened in the base. The piston 3-2 of the disc spring return hydraulic cylinder is positioned below the tail part of the lever 4, the front end of the lever is in a hook shape, and the hook part is arranged in the wedge-shaped groove of the base and hooks the hook groove of the lever supporting block 5. The lever supporting block is fixed in the wedge-shaped groove of the base through a first bolt 6. The key 7 is fixed at the bottom of the wedge-shaped groove of the base through a second bolt 8, and the key is provided with an end face which is contacted with the lower part of the lever supporting block (see figure 5).
Referring to fig. 1, a rear stopper 9 of the check system is fixed to a base 1 by a third bolt 10, and an inverted L-shaped rear pad 11 is fixed to the rear stopper by a fourth bolt 12.
The disc spring base 3-3 is a U-shaped cylinder, the disc springs 3-4 are arranged inside the U-shaped cylinder, and the height of the disc spring base is used for limiting, so that the disc springs are protected from being crushed when the disc springs are compressed to the maximum. The disc spring is in a compressed state in the hydraulic cylinder body 3-1 and used for ensuring that the piston is pushed to return by the resilience force of the downward disc spring when the hydraulic cylinder releases pressure.
The front end of the lever 4 is in a hook shape, and the hook-shaped part is a lever rotation supporting part. The part of the hook-shaped part, which is in clamping contact with the mold, is arc-shaped, and the radius of the arc is R1. The contact surface of the bottom of the lever supporting block hook and the groove of the base 1 is an inclined plane, the contact surface of the lever supporting block hook head and the lever 4 is arc-shaped, the arc shape is the same as that of the clamping contact part of the mold with the hook-shaped part, and the radius of the arc is also R1, so that the circle center of the radius R1 is taken as the rotation reference point when the lever 4 rotates under stress.
The rear cushion block 11 is of an inverted L shape; the key 7 has an end surface contacting the lower portion of the lever support block to prevent the lever support block from being released when the lever support block is forced upward.
Referring to fig. 4, 6, 7 and 8, the lever support block 5 is provided with a vertical opening E at the non-lever clamping position, having an opening width L1 greater than the lever width L2, for lifting the lever upward.
The method for clamping and replacing the die by using the ejection lever type clamping device comprises the following specific steps:
1) the disc spring return hydraulic cylinder 3 is fixed on the base 1 by using a fifth bolt 3-6, a lower oil hole 2 formed in the base 1 is communicated with a lower oil hole of the hydraulic cylinder body 3-1, and the disc spring 3-4 is arranged in an inner hole of the disc spring base 3-3 and is arranged at the upper part of the piston 3-2.
2) A lever supporting block 5 and a key 7 are fixed in a wedge-shaped groove of a base 1 through a first bolt 6 and a second bolt 8 respectively, one end face of the key 7 is in contact with the lower portion of the lever supporting block 5, the contact is in a locking state, a reverse rear check block 9 is fixed on the base 1 through a third bolt 10, and a reverse L-shaped rear cushion block 11 is fixed on the rear check block 9 through a fourth bolt 12.
3) The die 13 is placed between the hydraulic system and the limiting system, and after the die is placed, the lever 4 is placed into the wedge-shaped groove of the base from the vertical opening E of the lever supporting block 5 and slides to a clamping position F, namely the axis position in the hydraulic cylinder 3; oil is fed from the lower oil hole 2 and pressurized, hydraulic oil enters the disc spring return hydraulic cylinder 3-1 to push the piston 3-2 to move upwards to be in contact with the tail of the lever 4, so that the lever 4 rotates by taking the front lever rotation support position as a rotation reference point; the front end hook of the lever 4 is contacted with the front side inclined surface of the die 13 and pushes the die to move backwards to contact the inverted L-shaped rear cushion block 11; when the piston 3-2 moves to the top dead center, the locking effect on the mold 13 is achieved.
At the moment, the distance between the upper part of the disc spring base 3-3 and the bottom of the cylinder body cover plate 3-5 needs to be larger than zero so as to ensure that the upward pressure of the hydraulic cylinder is not blocked by the bottom of the cylinder body cover plate 3-5, and the disc spring 3-4 is in a compressed state and used for returning the piston 3-2 when the disc spring returns to the hydraulic cylinder for pressure relief; the short side of the inverted L-shaped rear cushion block 11 is used to assist in compressing the rear side of the mold 13.
4) And (3) releasing pressure from the lower oil hole 2, pushing the piston 3-2 to move downwards by the disc spring 3-4 through resilience force, loosening the tail part of the lever 4, enabling the lever 4 not to be stressed at the moment, sliding the lever 4 to the vertical opening E of the lever supporting block 5, and moving the lever 4 upwards, wherein the front side of the die 13 is not shielded, so that the die is easily pulled forwards to perform die change.
The device of the invention has scientific structure and simple and convenient operation. The invention avoids the problem of bolt loosening of the die in a long-term working state, not only provides guarantee for the stability of the quality of the forge piece, but also reduces the time for replacing the die, reduces the labor consumption and improves the production efficiency.
The invention can realize hydraulic locking and quick die change effects and is suitable for dies with various similar structures.
Claims (7)
1. The utility model provides a hydraulic pressure ejection lever clamping device of mould which characterized in that: the base is provided with a hydraulic system and a limiting system at the same time;
a cylinder body of a disc spring return hydraulic cylinder of the hydraulic system is fixed in the base, and a cylinder body cover plate is fixed on the base through a fifth bolt; a disc spring for limiting the upper section of the piston is arranged in the disc spring return hydraulic cylinder, and the disc spring is arranged in an inner hole of the disc spring; the lower part of the disc spring return hydraulic cylinder body is provided with an oil port communicated with an oil hole opened in the base; the piston of the disc spring return hydraulic cylinder is positioned below the tail part of the lever, the front end of the lever is in a hook shape, and the hook part is arranged in the wedge-shaped groove of the base and hooks the hook groove of the lever supporting block; the lever supporting block is fixed in the wedge-shaped groove of the base through a first bolt, and the key is fixed at the bottom of the wedge-shaped groove of the base through a second bolt; the key is provided with an end face which is contacted with the lower part of the lever supporting block;
and a rear stop block of the limiting system is fixed on the base through a third bolt, and an inverted L-shaped rear cushion plate is fixed on the rear stop block through a fourth bolt.
2. The hydraulic ejection lever clamp for a mold as claimed in claim 1, wherein: the dish spring base is the U type cylinder.
3. The hydraulic ejection lever clamp for a mold as claimed in claim 1, wherein: the front end of the lever is in a hook shape, and the hook-shaped part is a lever rotation supporting part.
4. The hydraulic ejection lever clamp for a mold as claimed in claim 1, wherein: the part of the front end hook-shaped part of the lever, which is in clamping contact with the mold, is arc-shaped, and the radius of the arc is R1; the contact surface of the lever supporting block hook head and the lever is arc-shaped, the arc shape is the same as that of the contact part of the hook-shaped part and the mold clamping part, and the radius of the arc is R1.
5. The hydraulic ejection lever clamp for a mold as claimed in claim 1, wherein: . The rear cushion block is of an inverted L shape.
6. The hydraulic ejection lever clamp for a mold as claimed in claim 1, wherein: the lever supporting block is provided with a vertical opening E in the vertical direction at a non-lever clamping position, and the width L1 of the vertical opening E is larger than the lever width L2.
7. A method of clamping and replacing a mold with the hydraulic ejection lever clamping device of claim 1, wherein: the method comprises the following specific steps:
1) fixing the disc spring return hydraulic cylinder on the base by using a fifth bolt, communicating a lower oil hole formed in the base with a lower oil port of the hydraulic cylinder body, and placing the disc spring in an inner hole of the disc spring base and on the upper part of the piston;
2) fixing the lever supporting block and the key in the wedge-shaped groove of the base by using a first bolt and a second bolt respectively, wherein one end face of the key is in contact with the lower part of the lever supporting block; fixing the inverted-L-shaped rear block on the base by using a third bolt and fixing the inverted-L-shaped rear block on the rear block by using a fourth bolt;
3) the die is placed between the hydraulic system and the limiting system, and after the die is placed, the lever is placed into the wedge-shaped groove of the base from the vertical opening of the lever supporting block and slides to a clamping position, namely the axis position of the hydraulic cylinder; oil is fed from the lower oil hole and pressurized, hydraulic oil enters the disc spring return hydraulic cylinder body, and pushes the piston to move upwards to be contacted with the tail part of the lever, so that the lever rotates by taking the rotation support position of the front lever as a rotation reference point; the front end hook of the lever is contacted with the front side inclined surface of the die and pushes the die to move backwards to contact the inverted L-shaped rear cushion block; when the piston moves to the top dead center, the locking effect on the die is achieved;
at the moment, the distance between the upper part of the disc spring base and the bottom of the cylinder body cover plate needs to be larger than zero so as to ensure that the upward pressure of the hydraulic cylinder is not blocked by the bottom of the cylinder body cover plate, and the disc spring is in a compressed state and used for returning the piston when the disc spring returns the hydraulic cylinder for pressure relief; the short edge of the inverted L-shaped rear cushion block is used for assisting in pressing the rear side of the die;
4) and (3) releasing pressure from the lower oil hole, pushing the piston to move downwards by the disc spring through resilience force, loosening the tail part of the lever, enabling the lever not to be stressed at the moment, sliding the lever to the vertical opening of the lever supporting block, moving out the lever, pulling the die forwards to perform die change operation, wherein the front side of the die is not shielded.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910898872.7A CN110640066A (en) | 2019-09-23 | 2019-09-23 | Hydraulic ejection lever type clamping device of mold and clamping and mold changing method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910898872.7A CN110640066A (en) | 2019-09-23 | 2019-09-23 | Hydraulic ejection lever type clamping device of mold and clamping and mold changing method |
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| Publication Number | Publication Date |
|---|---|
| CN110640066A true CN110640066A (en) | 2020-01-03 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201910898872.7A Pending CN110640066A (en) | 2019-09-23 | 2019-09-23 | Hydraulic ejection lever type clamping device of mold and clamping and mold changing method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113309937A (en) * | 2021-07-28 | 2021-08-27 | 浙江索特重工科技有限公司 | High-temperature-resistant hydraulic lock with wedge-shaped chuck |
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2019
- 2019-09-23 CN CN201910898872.7A patent/CN110640066A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113309937A (en) * | 2021-07-28 | 2021-08-27 | 浙江索特重工科技有限公司 | High-temperature-resistant hydraulic lock with wedge-shaped chuck |
| CN113309937B (en) * | 2021-07-28 | 2021-10-15 | 浙江索特重工科技有限公司 | High-temperature-resistant hydraulic lock with wedge-shaped chuck |
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