CN212124297U

CN212124297U - Forming device

Info

Publication number: CN212124297U
Application number: CN201922291750.XU
Authority: CN
Inventors: 王宝; 朱军吉; 汪春权; 田丽
Original assignee: Wuxi Huifeng Piezoeletric Co ltd
Current assignee: Wuxi Huifeng Piezoeletric Co ltd
Priority date: 2019-12-18
Filing date: 2019-12-18
Publication date: 2020-12-11
Anticipated expiration: 2029-12-18

Abstract

The embodiment of the application provides a forming device, relates to the field of machinery and aims to solve the problem that the defect rate of formed parts in the related art is high. The device comprises: a mounting frame; the die body is provided with a die cavity for filling materials; a first punch; the first punch and the blind hole core rod are respectively arranged on two sides of the die cavity in a sliding manner; and the third connecting part on the first connecting rod is connected with the mounting frame in a rotating manner, the first punch is connected with the first connecting part on the first connecting rod, the blind hole core rod is connected with the second connecting part on the first connecting rod, the second connecting part is positioned between the first connecting part and the third connecting part, and the first punch is slidable in the die cavity to drive the first connecting rod to rotate and drive the blind hole core rod to slide along the direction same as the sliding direction of the first punch through the first connecting rod. The application can be used for compression molding.

Description

Forming device

Technical Field

The utility model relates to the technical field of machinery, especially, relate to a forming device.

Background

Powder forming is a process of compacting a powder charge put into a die cavity into a shaped part by pressing.

Fig. 1 is a schematic view of press forming of a powder molded part in which a blind hole is formed in the related art, in which a left side view is a schematic view before press forming and a right side view is a schematic view after press forming. Referring to FIG. 1, blind core pin 101 is generally fixedly disposed at the bottom of mold cavity 102. The thickness S2 of the powder material above the blind hole core rod 101 before press forming is equal to the difference between the thickness S1 of the powder material on the side of the core rod and the height S3 of the blind hole core rod (namely S2 is S1-S3). The powder material is compacted by applying pressure above the powder material so that the amount of pressing down of the powder material reaches S4.

Thus, when the thickness S2 of the powder material above the blind core rod before press forming is large, the compressibility of the powder material above the blind core rod is high. The compressibility of the powder is too high, which easily causes defects in the molded parts.

SUMMERY OF THE UTILITY MODEL

The embodiment of the application provides a forming device to solve the problem that the defect rate of formed parts is high when the thickness of materials above a blind hole core rod is large before compression forming in the related art.

The embodiment of the application provides a forming device, forming device includes:

a mounting frame;

the die body is provided with a die cavity, and the die cavity is used for filling materials;

a first punch;

the first punch and the blind hole core rod are respectively arranged on two sides of the die cavity in a sliding manner; and the number of the first and second groups,

the third connecting part on the first connecting rod is rotatably connected with the mounting frame, the first punch is connected with the first connecting part on the first connecting rod, the blind hole mandril is connected with the second connecting part on the first connecting rod, wherein the second connecting part is positioned between the first connecting part and the third connecting part,

the first punch is slidable in the die cavity so as to drive the first connecting rod to rotate, and the blind hole core rod is driven by the first connecting rod to slide along the direction same as the sliding direction of the first punch.

Optionally, the mold body is fixedly connected with the mounting frame; the first punch is positioned above the die cavity, and the outer wall of the first punch is in sliding fit with the inner wall of the die cavity; the bottom of the die body is provided with a first through hole, and the outer wall of the blind hole core rod is in sliding fit with the inner wall of the first through hole.

Optionally, the first punch is driven by a first driving device, and the first punch is used for performing compression molding on the material filled in the die cavity; the blind hole core rod extends into the die cavity and is used for forming a blind hole in the part formed by pressing.

Optionally, the mold body is fixedly connected with the mounting frame; the first punch is positioned above the die cavity, and the outer wall of the first punch is in sliding fit with the inner wall of the die cavity; the device also comprises a second punch which is positioned below the die cavity, wherein the outer wall of the second punch is in sliding fit with the inner wall of the die cavity; and a second through hole is formed in the second punch, and the outer wall of the blind hole core rod is in sliding fit with the inner wall of the second through hole.

Optionally, the first punch is driven by a first driving device, and the first punch is used for performing compression molding on the material filled in the die cavity; the blind hole core rod extends into the die cavity and is used for forming a blind hole in the part subjected to compression molding; the second punch is driven by a second drive means and is used to eject the press formed part from the die cavity.

Optionally, the first punch and the first connecting portion are connected by a second connecting rod, one end of the second connecting rod is connected with the first punch, and the other end of the second connecting rod is connected with the first connecting portion.

Optionally, the second connecting portion is connected to the blind hole mandrel by a third connecting rod, one end of the third connecting rod is connected to the blind hole mandrel, and the other end of the third connecting rod is connected to the second connecting portion.

Optionally, the length of the third connecting rod is adjustable, and the thickness of the material filled above the blind hole core rod is adjusted by adjusting the length of the third connecting rod.

Optionally, the position of the second connecting portion on the first connecting rod is adjustable, and the second connecting portion is used for adjusting the stroke of the blind hole mandrel by adjusting the distance between the second connecting portion and the third connecting portion.

Optionally, the device further includes a fourth connecting rod, a fourth connecting portion on the fourth connecting rod is rotatably connected to the mounting frame, the second connecting portion is connected to a fifth connecting portion on the fourth connecting rod through the third connecting rod, and a sixth connecting portion on the fourth connecting rod is connected to the blind hole mandrel; wherein the fifth connecting portion is located between the fourth connecting portion and the sixth connecting portion; the position of the second connecting part on the first connecting rod is adjustable, the position of the fifth connecting part on the fourth connecting rod is adjustable, and the length of the third connecting rod is adjustable.

The embodiment of the application adopts at least one technical scheme which can achieve the following beneficial effects:

in the embodiment of the application, before the press forming, the length of the blind hole core rod extending into the die cavity can be larger than the depth of the blind hole, when the first punch slides and presses the material in the die cavity, the first punch drives the first connecting rod to rotate, the first connecting rod drives the blind hole core rod to slide towards the direction far away from the die cavity, and the length of the blind hole core rod extending into the die cavity is equal to the depth of the blind hole. Like this, because when filling the material in to the die cavity, the length that the blind hole plug stretches into the die cavity can be greater than the degree of depth of blind hole, can reduce the thickness of the material of blind hole plug top before the compression moulding, can reduce the compression ratio of the material of blind hole plug top to can reduce the defect rate of shaping part.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments or related technologies of the present application, the drawings needed to be used in the description of the embodiments or related technologies are briefly introduced below, it is obvious that the drawings in the following description are only some embodiments described in the present application, and for those skilled in the art, other drawings can be obtained according to these drawings without any creative effort.

FIG. 1 is a schematic view of press forming of a powder molded part with blind holes formed therein according to the related art, wherein a left side view is a schematic view before press forming and a right side view is a schematic view after press forming;

FIG. 2 is a schematic view of a first molding apparatus provided in an embodiment of the present disclosure;

FIG. 3 is a schematic view of the press forming of the forming apparatus shown in FIG. 2;

FIG. 4 is a schematic view of a second molding apparatus provided in an embodiment of the present application;

FIG. 5 is a schematic view of a third molding apparatus provided in an embodiment of the present application;

fig. 6 is a schematic view of press forming of a part provided with a blind hole according to an embodiment of the present application, where a left side view is a schematic view before press forming, and a right side view is a schematic view after press forming;

fig. 7 is a schematic view of a fourth molding apparatus provided in an embodiment of the present application.

Detailed Description

In order to make those skilled in the art better understand the technical solutions in the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

The technical solutions provided by the embodiments of the present application are described in detail below with reference to the accompanying drawings.

Referring to fig. 2, a molding apparatus 200 according to an embodiment of the present disclosure may include: a first punch 201, a die body 202, a blind core rod 203, a first link 204, and a mounting bracket 205.

The mold body 202 may have a mold cavity 2021 formed therein, and the mold cavity 2021 may be used for filling material. In the present embodiment, the material may be a powdery material, a granular material, etc., which are not listed here. It should be noted that the material may be various materials such as ceramic particles, metal powder, plastic particles, etc., which are not listed here. Furthermore, the cavity 2021 may be filled with a material with the cavity 2021 open, which will not be described in detail herein.

Optionally, in an embodiment of the present application, the mold body 202 may be fixedly connected to the mounting frame 205. It should be noted that the fixed connection described herein may refer to the mold body 202 being directly fixed on the mounting frame 205, or the mold body 202 being indirectly fixed on the mounting frame 205. It should be noted that in the following description, if a fixed connection is also present, it is also understood that two parts are directly or indirectly fixed.

It should be noted that the mounting frame 205 shown in the drawings is not in a real shape, and the mounting frame 205 may play a role of bearing each component in the molding device 200, that is, the mounting frame 205 may play a role of a rack, and the shape or structure thereof may be reasonably set according to actual conditions, which is not described in detail later.

In the embodiment of the present application, the first punch 201 and the blind core rod 203 are slidably disposed on both sides of the die cavity 2021, respectively. Alternatively, the first punch 201 may be arranged in a direction towards the opening of the die cavity 2021, and the first punch 201 may be used for press forming the material filled in the die cavity. It should be noted that the sliding arrangement may refer to that the arranged component and the structure for bearing the component are in sliding connection, which is not explained later. It should be noted that the press forming may include, for example, extrusion forming, dry press forming, etc., which is not limited herein and will not be explained one by one hereafter.

In an embodiment of the present disclosure, the first link 204 may include a first connecting portion 2041, a second connecting portion 2042, and a third connecting portion 2043 thereon, wherein the second connecting portion 2042 may be located between the first connecting portion 2041 and the third connecting portion 2043.

The third connecting portion 2043 may be rotatably connected to the mounting bracket 205, the first punch 201 may be connected to the first connecting portion 2041, and the blind core rod 203 may be connected to the second connecting portion 2042. In the embodiments of the present application, the connection may refer to a direct connection or an indirect connection.

Alternatively, in the embodiment of the present application, the first punch 201 is slidable in the die cavity 2021 to rotate the first link 204, and the blind core rod 203 is slid by the first link 204 in the same direction as the sliding direction of the first punch 201.

Specifically, referring to fig. 2, in the embodiment of the present application, when the first punch 201 slides to press the material in the die cavity, the first punch 201 may drive the first connecting rod 204 connected thereto to rotate around the third connecting portion 2043, and the first connecting rod 204 may drive the blind core rod 203 connected thereto to slide in the same direction as the sliding direction of the first punch 201.

The blind core rod 203 described here slides in the same direction as the sliding direction of the first punch 201, and means that the sliding directions of the two do not completely coincide with each other, but it can be understood that the two have the same sliding velocity component. For example, the first punch slides vertically downward, while the blind hole is an obliquely arranged blind hole, and correspondingly, the blind hole mandrel can also be obliquely arranged, so that the blind hole mandrel can slide obliquely downward. Of course, in other embodiments of the present application, the blind core rod may also slide in a vertically downward direction, with the first punch 201 sliding vertically downward. Likewise, the first punch may also slide obliquely, which is not illustrated in detail here. In addition, no one explanation is given in other embodiments of the present application.

In this way, in the embodiment of the application, before the press forming, the length that the blind hole plug stretches into the die cavity can be made to be greater than the depth of the blind hole, when the first punch slides and presses the material in the die cavity, the first punch drives the first connecting rod to rotate, the first connecting rod drives the blind hole plug to slide towards the direction far away from the die cavity, and the length that the blind hole plug stretches into the die cavity is made to be equal to the depth of the blind hole. Like this, because when filling the material in to the die cavity, the length that the blind hole plug stretches into the die cavity can be greater than the degree of depth of blind hole, can reduce the thickness of the material of blind hole plug top before the compression moulding, can reduce the compression ratio of the material of blind hole plug top to can reduce the defect rate of shaping part. In addition, it should be noted that the forming device provided in the embodiments of the present application may be used for forming a blank of a ceramic filter.

Optionally, in the embodiment of the present application, the molding device 200 may be disposed vertically, where vertically may include being parallel to the direction of gravity, and may also include being at an angle to the direction of gravity. When the forming device 200 is disposed at an angle to the direction of gravity, the first punch 201 can slide in an oblique direction, and when the forming device 200 is disposed parallel to the direction of gravity, the first punch 201 can slide in a direction parallel to the direction of gravity.

Alternatively, the first punch 201 may be located above the die cavity 202, and the outer wall of the first punch 201 may be slidably engaged with the inner wall of the die cavity, so that the material filled in the die cavity 2021 may be press-formed by the first punch.

Optionally, the bottom of the mold body 202 may be provided with a first through hole 2022, and an outer wall of the blind hole core rod 203 may be in sliding fit with an inner wall of the first through hole 202, so that the blind hole core rod 203 may be used to block the first through hole 2022, thereby preventing the material from leaking out through the first through hole 2022.

Optionally, the forming apparatus 200 may further include a first driving device 208, wherein the first driving device 208 may be configured to drive the first punch 201 to move, a fixed end of the first driving device 208 may be fixedly connected to the mounting seat 205, and a moving end of the first driving device 208 may be fixedly connected to the first punch 201. Alternatively, in the embodiment of the present application, the first driving device 208 may be a hydraulic cylinder, a pneumatic cylinder, a linear motor, or the like, and the first driving device 208 may also be a device including a rotating motor and a lead screw-nut mechanism. The first driving device 208 may also be a device including a rotating motor and a crank link mechanism, or the like.

Of course, the molding device provided in the embodiment of the present application may not include the first driving device, and a user may select a suitable driving device as the first driving device according to actual situations. Alternatively, for example, a pressing force may be applied to the first punch 201 by means of a human force. This is not limiting here.

The operation of the molding apparatus 200 will be briefly described below. Referring to fig. 2, when the material needs to be filled, the first punch 201 can be driven by the first driving device 208 to slide upwards to expose the opening of the die cavity 2021, and the material can be filled from the opening of the die cavity 2021. After the material is filled, the first punch 201 can be driven by the first driving device 208 to slide downward to press the material (refer to fig. 3), wherein the first punch 201 can be used to press the material filled in the die cavity 2021, when the first punch 201 slides to press the material in the die cavity, the first punch 201 drives the first connecting rod 204 to rotate, the first connecting rod 204 drives the blind hole core rod 203 to slide in a direction away from the die cavity, so that the length of the blind hole core rod 204 extending into the die cavity is equal to the depth of the blind hole, and thus, the material can be compacted into a part by a pressing manner, and the blind hole core rod 203 can be used to form a blind hole in the press-formed part.

After the part is formed, the first punch 201 may be driven by the first driving device 208 to slide upward, so as to expose the opening of the die cavity 2021. Alternatively, the molded part may be removed from the exposed opening of the mold cavity 2021 by providing an ejector mechanism below the mold cavity 2021, or by using suction cups. There are, of course, other ways to remove the molded part from the cavity 2021, which are not illustrated here.

In this way, in the embodiment of the application, before the press forming, the length that the blind hole plug stretches into the die cavity can be made to be greater than the depth of the blind hole, when the first punch slides and presses the material in the die cavity, the first punch drives the first connecting rod to rotate, the first connecting rod drives the blind hole plug to slide towards the direction far away from the die cavity, and the length that the blind hole plug stretches into the die cavity is made to be equal to the depth of the blind hole. Like this, because when filling the material in to the die cavity, the length that the blind hole plug stretches into the die cavity can be greater than the degree of depth of blind hole, can reduce the thickness of the material of blind hole plug top before the compression moulding, can reduce the compression ratio of the material of blind hole plug top to can reduce the defect rate of shaping part.

Alternatively, in an embodiment of the present application, referring to fig. 2 or 3, the first punch 201 and the first link 204 may be connected by a second link 2062, one end of the second link 2062 may be connected to the first punch 201, and the other end of the second link 2062 may be connected to the first connecting portion 2041. The blind core rod 203 and the first link 204 may be connected by a third link 2071, one end of the third link 2071 may be connected to the blind core rod 203, and the other end of the third link 2071 may be connected to the second connecting portion 2042.

Referring to fig. 2 or 3, alternatively, the first punch 201 may be fixedly connected to the first punch connecting plate 2061, and the first punch 201 may be indirectly connected to the second link 2062 by the first punch connecting plate 2061. The blind plugs 203 may be fixedly connected to a blind plug connecting plate 2072, and the blind plugs 203 may be indirectly connected to the third connecting rod 2071 by the blind plug connecting plate 2072.

Alternatively, in the embodiment of the present application, the first punch 201 may be fixedly connected to the first punch connecting plate 2061, the first punch connecting plate 2061 may be hinged to one end of the second link 2062, and the other end of the second link 2062 may be hinged to the first connecting portion 2041 of the first link 204.

Alternatively, in an embodiment of the present application, the blind mandrel 203 may be fixedly connected to a blind mandrel connecting plate 2072, the blind mandrel connecting plate 2072 may be hinged to one end of the third connecting rod 2071, and the other end of the third connecting rod 2071 may be hinged to the second connecting portion 2042 of the first connecting rod 204.

In this way, indirect connection of the first punch 201 to the first connecting portion 2041 and indirect connection of the blind core rod 203 to the second connecting portion 2042 can be achieved.

It should be noted that, in other embodiments of the present application, other manners may also be used to achieve indirect connection between the first punch and the first connecting portion, and other manners may also be used to achieve indirect connection between the blind hole core rod and the second connecting portion. In the following, another mode of indirectly connecting the first punch and the first connecting portion and indirectly connecting the blind plug and the second connecting portion will be briefly described with reference to the molding apparatus shown in fig. 2.

It should be noted that the forming device shown in fig. 2 is used as a basis for the description herein, and does not mean that all the components of the forming device shown in fig. 2 are included, and some substitutions may be made on the components of the forming device shown in fig. 2, which will not be explained one by one hereinafter.

Referring to fig. 4, in the forming apparatus 400, the first punch 201 may be fixedly connected to a first punch connecting plate 4061, the first punch connecting plate 4061 may be fixedly connected to one end of the second link 4062, and the other end of the second link 4062 may abut against the first connecting portion 4041 of the first link 204.

The blind core rod 203 may be fixedly connected to a blind core rod attachment plate 4072, the blind core rod attachment plate 4072 may be fixedly connected to one end of the third link 4071, and the other end of the third link 4071 may abut against the second connection portion 4042 of the first link 204.

Additionally, a blind core rod attachment plate 4072 may be coupled to an end of the telescoping member 409 and the resilient member 209 may provide a force to the blind core rod attachment plate 4072 to advance the blind core rod 203 into the mold cavity 2021. For example, referring to FIG. 4, the lower end of the blind mandrel attachment plate 4072 may be provided with a telescoping member 409, the telescoping member 409 being a spring under compression. The telescoping member 409 may be connected at one end to the blind core rod attachment plate 4072 and at the other end to the mounting bracket 205. Alternatively, the telescopic member 409 may be a spring, a hydraulic cylinder, an air cylinder, etc., which are not enumerated here.

Note that, in the embodiment of the present application, a stopper 4101 and a second stopper 4102 may be provided to define the upper and lower limit positions of the first blind core rod attachment plate 4072, respectively. Thus, when the first punch is slid upward to expose the opening of the die cavity 2021, both the second link 4062 and the third link 4071 can be disengaged from the first link 204. Thus, the first stopper 4101 can be used to limit the maximum penetration length of the blind core rod 203 into the cavity 2021, thereby facilitating the filling of the material. The second stop 4102 can be used to limit the minimum length of the blind core rod 203 that can penetrate into the die cavity 2021, and the depth of the blind hole can be controlled.

It should be noted that, referring to fig. 4, when the first punch 201 slides, the contact point between the second link 4062 and the first link 204 moves. That is, the first connection portion 4041 may not be a fixed point on the first link 204. Similarly, the contact point between the third link 4071 and the first link 204 also moves, and the second connection portion 4042 may not be a fixed point on the first link 204.

In this way, indirect connection of the first punch 201 to the first connection portion 4041 and indirect connection of the blind core rod 203 to the second connection portion 4042 can be achieved.

Referring to fig. 4, the operation of the molding apparatus 400 is briefly described. Referring to fig. 4, when the material needs to be filled, the first punch 201 can be driven by the first driving device 208 to slide upwards to expose the opening of the die cavity 2021, and the material can be filled from the opening of the die cavity 2021. During the upward sliding of the first punch 201, the telescopic element 409 drives the blind core rod attachment plate 4072 to move upward, the blind core rod attachment plate 4072 stops moving upward after contacting the first stop 4101, and the blind core rod 203 stops moving after moving to a predetermined height. The first punch 201 continues to slide upward until the opening of the die cavity 2021 is exposed.

After the materials are filled, the first punch 201 can be driven by the first driving device 208 to slide downwards to press the materials, when the first punch 201 slides downwards to press the materials, the first punch 201 drives the first punch connecting plate 4061 to move downwards, the first punch connecting plate 4061 drives the second connecting rod 4062 to move downwards, the second connecting rod 4062 drives the first connecting rod 204 to rotate, the first connecting rod 204 drives the blind hole core rod connecting plate 4072 to move downwards, and the blind hole core rod connecting plate 4072 drives the blind hole core rod 203 connected with the blind hole core rod connecting plate 4072 to move downwards. When the material is gradually compacted, the blind core rod attachment plate 4072 contacts the second stop plate, the blind core rod 203 stops moving, and the first punch 201 also stops moving downward. In this way, the material may be compacted into a part by pressing, wherein the blind core rod 203 may be used to form blind holes in the press formed part.

Furthermore, it should be noted that in the embodiments of the present application, the forming device may further include a second punch. A molding apparatus including a second punch will be briefly described below based on the molding apparatus shown in fig. 2. It should be noted that in addition to the forming device shown in fig. 2, in other embodiments of the present application, a second punch may be included. This is not always the case.

Referring to fig. 5, in the molding apparatus 500, on the basis of the molding apparatus 200, a cavity may be formed on the mold body 502, and the cavity may form an inner wall of the mold cavity 5021. The mold body 502 may be fixedly attached to the mounting bracket 205. The first punch 201 may be positioned above the die cavity 5021, and an outer wall of the first punch 201 may be in sliding engagement with an inner wall of the die cavity 5021. The second punch 509 may be positioned below the die cavity 5021 with the outer wall of the second punch 509 in sliding engagement with the inner wall of the die cavity 5021. The second punch 509 may be formed with a second through hole 5091, and an outer wall of the blind core 203 may be slidably fitted to an inner wall of the second through hole 5091.

Alternatively, the first punch 201 may be driven by the first driving device 208, and the first punch 201 may be used to perform press forming on the material filled in the die cavity 5021. The blind core rod 203 may extend into the mold cavity 5021, and the blind core rod 203 may be used to form a blind hole in a press formed part. The second punch 509 may be driven by a second drive 5092, and the second punch 509 may be used to eject the press formed part from the die cavity 5021.

It should be noted that, in the embodiment of the present application, the second driving device 2092 may be various linear output power devices. Such as hydraulic cylinders, pneumatic cylinders, etc., to name but a few.

Alternatively, in an embodiment of the present application, the third link 2071 may be provided in a length-adjustable structure on the basis of the molding apparatus 200 shown in fig. 2 or the molding apparatus 500 shown in fig. 5. Referring to fig. 2 or 5, for example, when the length of the third connecting rod 2071 is increased, the blind mandrel 203 may slide upward. The increase in the penetration of the blind plug 203 into the die cavity 2021 reduces the thickness of the material filled above the blind plug 203. Similarly, when the length of the third connecting rod 2071 is reduced, the thickness of the filled material above the blind core rod 203 may increase. In this way, the thickness of the material filled above the blind core rod can be adjusted during the filling of the material.

Alternatively, in an embodiment of the present application, the third link 4071 may be provided as a length-adjustable structure on the basis of the molding apparatus 400 shown in fig. 4. Referring to FIG. 4, for example, when the length of the third link 4071 is increased, the blind core rod 203 can slide downward. The decrease in the penetration of the blind plug 203 into the die cavity 2021 increases the thickness of the material filled above the blind plug 203. Similarly, when the length of the third link 4071 is reduced, the thickness of the material packed above the blind core rod 203 is reduced. In this way, the thickness of the material filled above the blind core rod can be adjusted during the filling of the material.

It should be noted that length-adjustable structures are readily available in the mechanical arts. For example, the third link may be formed by a bolt and a rod member having an internal thread, and the length of the third link may be adjusted by screwing or unscrewing the bolt. Of course, the third link may have other structures, which are not listed here.

Further, similarly, in the embodiment of the present application, the second link may be provided in a length-adjustable structure. Through adjusting the length of second connecting rod, also can realize adjusting the thickness of the material that the blind hole top was filled.

It should be noted that, although fig. 2, fig. 4, and fig. 5 are only used as examples in the above description, it is easy to understand that the above-described scheme may be adopted in other embodiments of the present application. This is not to be taken as an example.

Alternatively, in the embodiment of the present application, the second connecting portion 2042 may be provided as a position-adjustable structure on the basis of the molding apparatus 200 shown in fig. 2 or the molding apparatus 500 shown in fig. 5. For example, the second connecting portion 2042 may be provided on a slider mechanism, and the position of the second connecting portion 2042 may be adjusted by adjusting the position of the slider. Thus, for example, assuming that the first connecting portion 2041 moves downward by a certain distance, the second connecting portion 2042 moves downward by a smaller distance as the second connecting portion 2042 gets closer to the third connecting portion 2043. Thus, the stroke of the blind plug 203 can be adjusted by adjusting the distance between the second connecting portion 2042 and the third connecting portion 2043.

Alternatively, in an embodiment of the present application, the third link 4071 may be provided as a position-adjustable structure on the basis of the molding apparatus 400 shown in fig. 4. For example, the third link 4071 may be provided on a slider mechanism, and the position of the second connection portion 4042 may be adjusted by adjusting the position of the slider to adjust the position of the third link 4071. Thus, for example, assuming that the first connection portion 4041 moves downward by a certain distance, the second connection portion 4042 moves downward by a smaller distance as the second connection portion 4042 approaches the third connection portion 4043. Thus, the stroke of the blind-hole plug 203 can be adjusted by adjusting the distance between the second connection portion 4042 and the third connection portion 4043.

Further, similarly, in the embodiment of the present application, the second link may be provided as a position-adjustable structure. The stroke of the blind hole core rod can be adjusted by adjusting the distance between the first connecting part and the third connecting part.

The following briefly describes advantages of the molding apparatus provided in the embodiments of the present application compared to the molding apparatus in the related art, taking specific components as examples. Fig. 6 is a schematic view of press forming of a part provided with a blind hole according to an embodiment of the present application, where the left side view is a schematic view before press forming, and the right side view is a schematic view after press forming.

Referring to fig. 6, assuming that the height SS1 of the material before press forming is 17.5mm, the length of the second link can be adjusted so that the length SS3 of the blind core penetrating into the cavity is 12.5mm, so that the thickness of the material above the blind core is about 5 mm. The distance between the second connecting part and the third connecting part can be adjusted so that the stroke of the blind hole core rod is 7.5mm when the first punch is pressed down by 10.5 mm. Thus, a part having a height SS7 of 7mm and a blind hole depth SS6 of 5mm can be obtained by press forming. The calculation results show that the compression ratio of the material on the side of the blind core rod ((SS1-SS7)/SS1) is 60%. The compression ratio of the material above the blind hole core rod ((SS1-SS3) - (SS7-SS6)/(SS1-SS3)) was 60%.

Before the machining of the part, for example, the part height SS7 may be 7mm and the blind hole depth SS6 may be 5 mm. The amount of material to be filled can be obtained by the properties of the material, so that a height SS1 of 17.5mm can be obtained. In the related art, the thickness of the material above the blind hole core rod is 5mm because the blind hole core rod is fixedly arranged. In the related art, the press forming is performed, the distance (SS1-SS7) of the first punch to be pressed down is 10.5mm, and the compression ratio of the material on the side of the blind hole core rod ((SS1-SS7)/SS1) is 60%. The compression ratio of the material above the blind hole core rod ((SS1-SS6) - (SS7-SS6)/(SS1-SS 6)) was 84%. Because the compression ratio of the material above the blind hole core rod is inconsistent with the compression ratio of the material at the side of the blind hole core rod, the density of the molded part is inconsistent. So that the defect rate of the molded part is high.

It should be noted that, referring to fig. 2, assuming that the first punch press amount is H1, the amount of downward movement of the first connecting portion 2041 is about H1. Assuming that the amount of downward movement of the blind plug 5091 is H2, the amount of downward movement of the second connecting portion 2042 is about H2. Assume that the distance between the first connecting portion 2041 and the third connecting portion 2043 is L1, and the distance between the second connecting portion 2042 and the third connecting portion 2043 is L2. Since the first connecting portion 2041 and the second connecting portion 2042 both rotate around the third connecting portion 2043, H1/H2-L1/L2 can be obtained in short sight. The distance L2 between the second connecting portion 2042 and the third connecting portion can be L1 × H2/H1.

Referring to fig. 6, H2 ═ SS4 ═ SS1-SS7, and H2 ═ SS5 can be obtained. When the distance setting of L2 is considered, the L2 distance may be set such that the compression ratio of the material on the side of the blind hole core rod substantially coincides with the compression ratio of the material above the blind hole core rod, that is, (SS1-SS7)/SS1 ═ (SS1-SS3) - (SS7-SS6)/(SS1-SS 3). In general, the sizes of SS1, SS6, SS7 may be considered known. Thus, the actual distance between the second connecting portion 2042 and the third connecting portion 2043 and the size of SS3 can be obtained.

By adopting the scheme provided by the embodiment of the application, the compression ratio of the material on the side of the blind hole mandril can be basically consistent with the compression ratio of the material above the blind hole mandril by adjusting the length of the second connecting rod and adjusting the distance between the second connecting part and the third connecting part. In addition, because in the embodiment of the application, the first punch and the blind hole core rod can be both connected with the first rod, and the first punch and the blind hole core rod can move synchronously, the pressing rate of the material on the side of the blind hole core rod can be basically consistent with the pressing rate of the material on the upper side of the blind hole core rod. Therefore, the density consistency of the parts obtained by the forming device provided by the embodiment of the application is better, and the physical properties of the parts are better.

It should be noted that, in other embodiments of the present application, the indirect connection between the blind hole punch and the first connection portion may be implemented in other manners. In the following, another mode of achieving indirect connection between the blind punch and the first connecting portion will be briefly described with reference to the molding apparatus shown in fig. 2.

Referring to fig. 7, in an embodiment of the present application, one end of the third link 2071 may be connected with the second connecting portion 2042 on the first link 204. The molding device 700 may further include a fourth link 711 and a fifth link 712. The fourth link 711 includes a fourth connecting portion 7111, a fifth connecting portion 7112, and a sixth connecting portion 7113. The fifth connecting portion 7112 is located between the fourth connecting portion 7111 and the sixth connecting portion 7113.

The fourth connecting portion 7111 is rotatably connected to the mounting bracket 205. The second connecting portion 2042 and the fifth connecting portion 7112 are connected by a third link 2071. The sixth connecting portion 7113 and the blind mandrel connecting plate 2072 are connected by a fifth link 712.

Optionally, the fourth connecting portion 7111 is hingedly connected to the mounting bracket 205. One end of the third link 2071 is hinged to the second connecting portion 2042, and the other end is hinged to the fifth connecting portion 7112. One end of the fifth link 712 is hinged to the sixth connecting portion 7113, and the other end is hinged to the blind-hole mandrel connecting plate 2072.

Optionally, in the embodiment of the present application, the position of the second connecting portion 2042 on the first link 204 is adjustable, so that the distance between the second connecting portion 2042 and the third connecting portion 2043 can be adjusted. The position of the fifth connecting portion 7112 on the fourth link 711 is adjustable, so that the distance between the fifth connecting portion 7112 and the sixth connecting portion 7113 can be adjusted.

Alternatively, in the embodiment of the present application, the length of the third connecting rod 2071 may be adjusted, so that the thickness of the material filled above the blind core rod 203 may be adjusted.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

Although embodiments of the present application have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the embodiments of the application, the scope of which is defined in the appended claims and their equivalents.

Claims

1. A molding apparatus, comprising:

a mounting frame;

a first punch;

2. The molding apparatus as defined in claim 1,

the die body is fixedly connected with the mounting rack;

the first punch is positioned above the die cavity, and the outer wall of the first punch is in sliding fit with the inner wall of the die cavity;

the bottom of the die body is provided with a first through hole, and the outer wall of the blind hole core rod is in sliding fit with the inner wall of the first through hole.

3. The molding apparatus as defined in claim 1,

the first punch is driven by a first driving device and is used for performing compression molding on the material filled in the die cavity;

the blind hole core rod extends into the die cavity and is used for forming a blind hole in the part formed by pressing.

4. The molding apparatus as defined in claim 1,

the die body is fixedly connected with the mounting rack;

the device also comprises a second punch which is positioned below the die cavity, wherein the outer wall of the second punch is in sliding fit with the inner wall of the die cavity;

and a second through hole is formed in the second punch, and the outer wall of the blind hole core rod is in sliding fit with the inner wall of the second through hole.

5. The molding apparatus as defined in claim 4,

the blind hole core rod extends into the die cavity and is used for forming a blind hole in the part subjected to compression molding;

the second punch is driven by a second drive means and is used to eject the press formed part from the die cavity.

6. The molding apparatus as defined in claim 1,

the first punch is connected with the first connecting portion through a second connecting rod, one end of the second connecting rod is connected with the first punch, and the other end of the second connecting rod is connected with the first connecting portion.

7. The molding apparatus as defined in claim 1,

the second connecting part is connected with the blind hole mandril through a third connecting rod, one end of the third connecting rod is connected with the blind hole mandril, and the other end of the third connecting rod is connected with the second connecting part.

8. The molding apparatus as defined in claim 7,

the length of the third connecting rod is adjustable, and the thickness of the material filled above the blind hole core rod is adjusted by adjusting the length of the third connecting rod.

9. The molding apparatus as defined in claim 1,

the position of the second connecting part on the first connecting rod is adjustable, and the second connecting part is used for adjusting the stroke of the blind hole mandrel by adjusting the distance between the second connecting part and the third connecting part.

10. The molding apparatus as defined in claim 7,

the device further comprises a fourth connecting rod, a fourth connecting part on the fourth connecting rod is rotatably connected with the mounting frame, the second connecting part is connected with a fifth connecting part on the fourth connecting rod through the third connecting rod, and a sixth connecting part on the fourth connecting rod is connected with the blind hole mandril; wherein the fifth connecting portion is located between the fourth connecting portion and the sixth connecting portion;

the position of the second connecting part on the first connecting rod is adjustable, the position of the fifth connecting part on the fourth connecting rod is adjustable, and the length of the third connecting rod is adjustable.