阅读说明：本技术 曲柄压力机上顶出机构 (Upper ejection mechanism of crank press ) 是由 张进 郑红灿 贺雨露 曹曦 于 2019-12-27 设计创作，主要内容包括：本发明属于锻压技术领域,具体涉及一种曲柄压力机上顶出机构。其包括安装于滑块内的一级顶出组件和安装于模架内的二级顶出组件；一级顶出组件包括顶压套和导向套,顶压套与压力机的摆臂接触,顶压套内固定安装有氮气弹簧,导向套内滑动安装有一级顶杆,一级顶杆与氮气弹簧相接触；顶压套端部连接有压盖,压盖与导向套上套装有一级螺旋弹簧；二级顶出组件包括二级顶杆,二级顶杆上套装有二级螺旋弹簧,模架内设置有限位槽,二级顶杆伸至所述限位槽内,限位槽内放置有顶压板,顶压板与一级顶杆的顶出端接触。本发明结构设计合理,不仅可满足及时顶出产品的要求,而且有效缩短了顶出行程,保证零部件不易损坏。(The invention belongs to the technical field of forging and pressing, and particularly relates to an upper ejection mechanism of a 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 ejection mechanism is reasonable in structural design, can meet the requirement of timely ejecting products, effectively shortens the ejection stroke, and ensures that parts are not easy to damage.)

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;

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.

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.

Technical Field

The invention belongs to the technical field of forging and pressing, and particularly relates to an upper ejection mechanism of a 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.

Disclosure of Invention

In order to solve the technical problems, the invention aims to provide the upper ejection mechanism of the crank press, which has reasonable structural design, meets the ejection requirement and can ensure that parts are not damaged.

In order to achieve the technical purpose, the invention 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 invention has at least the following beneficial effects: 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 for purposes of illustrating and explaining the present invention and are not to be construed as limiting the scope of the present invention. Wherein:

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

FIG. 2 is a schematic view of the embodiment of the present invention in its natural state (when not ejected);

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

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

Detailed Description

The invention is further illustrated below with reference to the figures and examples. In the following detailed description, certain exemplary embodiments of the present invention are described by way of illustration only. Needless to say, a person skilled in the art realizes that the described embodiments can be modified in various different ways without departing from the spirit and scope of the present 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 conventional fixing connection methods can be adopted, and the fixing connection methods are all 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 invention 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.

In conclusion, the invention has reasonable integral structure design, realizes the secondary ejection action through the primary ejection assembly 10 and the secondary ejection assembly 20, can meet the requirement of ejecting products in time by utilizing the stroke time difference of the swing arm, can effectively shorten the ejection stroke, can ensure that parts such as bolts and the like are not easy to damage, is convenient to operate and use, and is suitable for popularization and application.

The above description is only an exemplary embodiment of the present invention, and is not intended to limit the scope of the present invention. Any equivalent changes and modifications that can be made by one skilled in the art without departing from the spirit and principles of the invention shall fall within the protection scope of the invention.