CN211360530U

CN211360530U - Upper ejection mechanism of crank press

Info

Publication number: CN211360530U
Application number: CN201922400035.5U
Authority: CN
Inventors: 张进; 郑红灿; 贺雨露; 曹曦
Original assignee: Nanjing Automobile Forging Co ltd
Current assignee: Nanjing Automobile Forging Co ltd
Priority date: 2019-12-27
Filing date: 2019-12-27
Publication date: 2020-08-28
Anticipated expiration: 2029-12-27

Abstract

The utility model belongs to the technical field of the forging and pressing, concretely relates to ejecting mechanism on crank press. The device comprises a first-stage ejection assembly arranged in a sliding block and a second-stage ejection assembly arranged in a die carrier; the primary ejection assembly comprises an ejection sleeve and a guide sleeve, the ejection sleeve is in contact with the swing arm of the press, a nitrogen spring is fixedly mounted in the ejection sleeve, a primary ejector rod is slidably mounted in the guide sleeve, and the primary ejector rod is in contact with the nitrogen spring; the end part of the jacking sleeve is connected with a gland, and the gland and the guide sleeve are sleeved with a primary spiral spring; the second-stage ejection assembly comprises a second-stage ejector rod, a second-stage spiral spring is sleeved on the second-stage ejector rod, a limiting groove is formed in the die carrier, the second-stage ejector rod extends into the limiting groove, a top pressure plate is placed in the limiting groove, and the top pressure plate is in contact with the ejection end of the first-stage ejector rod. The utility model has the advantages of reasonable design, not only can satisfy the requirement of timely ejecting product, effectively shortened ejecting stroke moreover, guarantee that spare part is not fragile.

Description

Upper ejection mechanism of crank press

Technical Field

The utility model belongs to the technical field of the forging and pressing, concretely relates to ejecting mechanism on crank press.

Background

In the forging process of the hot die forging press, when the sliding block moves upwards through a bottom dead center, if the upper ejection material cannot be ejected timely, a product may move upwards along with the upper die and then fall onto the lower die when the ejection mechanism ejects the product. The product can not just fall into down the model chamber when falling the lower mould, and this can not have harmful effects when manual clamp is got, but can lead to pressing from both sides not to reach or press from both sides the shakiness when the robot jack catch snatchs, and then leads to the production line to shut down.

Therefore, the ejection starting time of the upper ejection mechanism needs to be advanced, and the ejection stroke is increased to exceed the allowable range of the die carrier due to the advance of the ejection starting time of the upper ejection mechanism, so that the bolts for swinging the arms or fixing the die carrier are easily broken.

Therefore, there is an urgent need for an upward ejection structure that can solve the ejection problem and ensure that the parts are not damaged.

SUMMERY OF THE UTILITY MODEL

In order to solve the technical problem, an object of the utility model is to provide a mechanism is pushed up on crank press that structural design is reasonable, satisfy ejecting requirement and can guarantee that spare part does not damage.

In order to achieve the technical purpose, the utility model adopts the following technical scheme: the upper ejection mechanism of the crank press comprises a first-stage ejection assembly arranged in a sliding block and a second-stage ejection assembly arranged in a die carrier, and the die carrier is fixedly connected with the sliding block;

the primary ejection assembly comprises an ejection sleeve which is slidably arranged in the sliding block and a guide sleeve which is fixedly arranged in the sliding block, the ejection sleeve is contacted with a swing arm of the press, a nitrogen spring is fixedly arranged in the ejection sleeve, a primary ejector rod is slidably arranged in the guide sleeve, and the primary ejector rod is contacted with the nitrogen spring; the end part of the jacking sleeve is connected with a gland used for compressing the primary ejector rod and the nitrogen spring; a first-stage spiral spring is sleeved on the gland and the guide sleeve, and the first-stage ejector rod penetrates through the first-stage spiral spring;

the secondary ejection assembly comprises a secondary ejector rod which is slidably installed in the die set, a secondary spiral spring is sleeved on the secondary ejector rod, a limiting groove is formed in the die set, the secondary ejector rod extends into the limiting groove, a jacking plate for pushing the secondary ejector rod is placed in the limiting groove, and the jacking plate is in contact with the ejection end of the primary ejector rod.

As a preferred technical scheme, the guide sleeve is fixedly connected with the sliding block through an inner hexagon bolt.

As a preferred technical scheme, the nitrogen spring is arranged in the jacking sleeve and is fixedly connected with the jacking sleeve through a hexagon socket head cap screw.

As a preferred technical scheme, the jacking sleeve and the gland are fixedly connected through an inner hexagonal bolt.

As the preferred technical scheme, the two secondary ejector rods are symmetrically arranged.

Due to the adoption of the technical scheme, the utility model discloses following beneficial effect has at least: when the slide block of the press machine reaches the lowest limit and starts to move upwards (namely when the machine tool moves upwards from the bottom dead center), the swing arm presses the first-stage ejection assembly downwards, the ejection sleeve of the first-stage ejection assembly drives the nitrogen spring and the gland to compress the first-stage spiral spring to move downwards, the nitrogen spring pushes the first-stage ejector rod to synchronously move downwards and compress the ejection plate and the second-stage ejector rod in the die set, so that the second-stage ejector rod ejects a product out of an upper die while the slide block moves upwards, and at the moment, the second-stage ejector rod compresses the second-stage spiral spring until the ejection plate is contacted with a limiting groove in the die set, so that the ejection. Along with the swing arm continues to push down, because the roof pressure board can't continue downstream, nitrogen spring begins the compression until the swing arm pushes down the maximum value this moment, and its structural design is reasonable, through the ejecting action of second grade, not only can satisfy the requirement of ejecting product in time, has effectively shortened ejecting stroke moreover, can guarantee that spare part is not fragile.

Drawings

The drawings are only intended to illustrate and explain the present invention and do not limit the scope of the invention. Wherein:

fig. 1 is a schematic structural diagram of an embodiment of the present invention;

fig. 2 is a schematic structural diagram of the embodiment of the present invention in a natural state (when not ejected) when applied;

fig. 3 is a schematic structural diagram of the embodiment of the present invention in an ejection state;

fig. 4 is a schematic structural diagram of the embodiment of the present invention in the maximum ejection stroke during application.

Detailed Description

The invention is further explained below with reference to the drawings and examples. In the following detailed description, certain exemplary embodiments of the present invention have been described by way of illustration only. Needless to say, a person skilled in the art will recognize that the described embodiments can be modified in various different ways without departing from the spirit and scope of the invention. Accordingly, the drawings and description are illustrative in nature and not intended to limit the scope of the claims.

As shown in fig. 1, the upward ejection mechanism of the crank press comprises a first-stage ejection assembly 10 installed in a sliding block 30 and a second-stage ejection assembly 20 installed in a die carrier 40, wherein the die carrier 40 is fixedly connected with the sliding block 30;

referring to fig. 1 and 2, the primary ejection assembly 10 includes a top pressing sleeve 11 slidably mounted in the slide block 30 and a guide sleeve 12 fixedly mounted in the slide block 30, the top pressing sleeve 11 is in contact with a swing arm 50 of the press, a nitrogen spring 13 is fixedly mounted in the top pressing sleeve 11, a primary ejector rod 14 is slidably mounted in the guide sleeve 12, and the primary ejector rod 14 is in contact with the nitrogen spring 13; the end part of the top pressing sleeve 11 is connected with a pressing cover 15 for pressing the primary ejector rod 14 and the nitrogen spring 13; the gland 15 and the guide sleeve 12 are sleeved with a primary spiral spring 16, and the primary ejector rod 14 penetrates through the primary spiral spring 16.

In order to facilitate installation and disassembly maintenance, in this embodiment, the guide sleeve 12 and the slider 30, the nitrogen spring 13 and the pressing sleeve 11, and the pressing sleeve 11 and the pressing cover 15 are respectively and fixedly connected by hexagon socket head cap screws 17. Of course, other commonly used fixing connection modes can be adopted, and all the modes are within the protection scope of the invention.

The secondary ejection assembly 20 includes two secondary ejector rods 21 slidably mounted in the mold frame 40, in this embodiment, the two secondary ejector rods 21 are symmetrically arranged, and may be 1 or 3, and the like, and are used for ejecting a product; the two-stage ejector rod 21 is sleeved with a two-stage spiral spring 22, a limit groove 41 is formed in the die carrier 40, one end of the two-stage ejector rod 21 extends into the limit groove 41, a jacking plate 23 for pressing the two-stage ejector rod 21 is placed in the limit groove 41, and the jacking plate 23 is in contact with the jacking end of the one-stage ejector rod 14.

The working principle of the utility model is as follows: referring to fig. 2, when the press slide 30 reaches the lowest limit and starts to move upward (i.e. the machine tool moves upward from the bottom dead center), the swing arm 50 presses the first-stage ejection assembly 10 downward, the top pressing sleeve 11 of the first-stage ejection assembly 10 drives the nitrogen spring 13 and the pressing cover 15 to compress the first-stage coil spring 16 to move downward, the nitrogen spring 13 pushes the first-stage ejector rod 14 to synchronously move downward and compress the top pressing plate 23 and the second-stage ejector rod 21 in the die set 40, so that the second-stage ejector rod 21 ejects the product out of the upper die while moving upward on the slide 30, and at this time, the second-stage ejector rod 21 compresses the second-stage coil spring 22 until the top pressing plate 23 contacts with the limiting groove 41 in the die set, so that the top pressing. As the swing arm 50 continues to be depressed, the nitrogen spring 13 begins to compress until the swing arm 50 is depressed to a maximum value (see fig. 4) because the top pressure plate 23 cannot continue to move downward.

To sum up, the utility model discloses overall structure reasonable in design realizes the ejecting action of second grade through the ejecting subassembly of one-level 10 and the ejecting subassembly 20 of second grade, utilizes the stroke time difference of swing arm, not only can satisfy the requirement of timely ejecting product, can effectively shorten ejecting stroke moreover, can guarantee that spare parts such as bolt are not fragile, operation convenient to use is suitable for popularization and application.

The above description is only exemplary of the present invention, and is not intended to limit the scope of the present invention. Any person skilled in the art should also realize that such equivalent changes and modifications can be made without departing from the spirit and principles of the present invention.

Claims

1. Ejecting mechanism on crank press, its characterized in that: the device comprises a first-stage ejection assembly arranged in a sliding block and a second-stage ejection assembly arranged in a die carrier, wherein the die carrier is fixedly connected with the sliding block;

2. The ejector mechanism of claim 1, wherein: the guide sleeve is fixedly connected with the sliding block through an inner hexagon bolt.

3. The ejector mechanism of claim 1, wherein: the nitrogen spring is arranged in the jacking sleeve and is fixedly connected with the jacking sleeve through a hexagon socket head cap screw.

4. The ejector mechanism of claim 1, wherein: the top pressing sleeve and the pressing cover are fixedly connected through the inner hexagon bolt.

5. The ejector mechanism of any one of claims 1 to 4, wherein: the two secondary ejector rods are symmetrically arranged.