Aluminum alloy internal corner template and processing method thereof

文档序号:1933581 发布日期:2021-12-07 浏览:14次 中文

阅读说明:本技术 一种铝合金阴角模板及其加工方法 (Aluminum alloy internal corner template and processing method thereof ) 是由 曹海平 于 2021-08-31 设计创作,主要内容包括:本发明公开了一种铝合金阴角模板及其加工方法,包括连接端面,其包括端面板,所述端面板沿外周设置有连接凸台,所述端面板与所述连接凸台一体成型;还提供一种铝合金阴角模板:包括连接端面、连接型材,所述连接凸台嵌入所述连接型材内,所述连接凸台外侧面与所述连接型材内侧面接触;所述连接型材内侧设置有沿长度方向延伸的凸起,所述连接凸台上设置有凹槽,所述凸起嵌入所述凹槽内;阴角端板使用压力铸造的方法成型,可成型复杂的结构,同时产品的结构刚度高,生产成本低,阴角端板延伸出的凸台能够增大焊接接触面积进行摩擦搅拌焊,提高了阴角模板的强度。(The invention discloses an aluminum alloy internal corner template and a processing method thereof, wherein the aluminum alloy internal corner template comprises a connecting end face, wherein the connecting end face comprises an end face plate, a connecting boss is arranged on the periphery of the end face plate, and the end face plate and the connecting boss are integrally formed; still provide an aluminum alloy reentrant corner template: the connecting boss is embedded into the connecting section bar, and the outer side surface of the connecting boss is contacted with the inner side surface of the connecting section bar; the inner side of the connecting section bar is provided with a bulge extending along the length direction, the connecting boss is provided with a groove, and the bulge is embedded into the groove; the internal corner end plate is formed by a pressure casting method, a complex structure can be formed, meanwhile, the structural rigidity of the product is high, the production cost is low, the lug boss extending out of the internal corner end plate can increase the welding contact area to carry out friction stir welding, and the strength of the internal corner template is improved.)

1. The utility model provides an aluminum alloy reentrant corner template which characterized in that: comprises the steps of (a) preparing a mixture of a plurality of raw materials,

the connecting end face (100) comprises an end face plate (101), the end face plate (101) is provided with a connecting boss (102) along the periphery, and the end face plate (101) and the connecting boss (102) are integrally formed;

the connecting section bar (200) is embedded into the connecting boss (102), and the outer side face of the connecting boss (102) is in contact with the inner side face of the connecting section bar (200).

2. The internal corner aluminum alloy form of claim 1, wherein: the inner side of the connecting section bar (200) is provided with a protrusion (201) extending along the length direction, a groove (102a) is formed in the connecting boss (102), and the protrusion (201) is embedded into the groove (102 a).

3. The internal corner aluminum alloy form according to claim 1 or 2, wherein: a rib plate (A) is arranged in the connecting section bar (200), and the outer edge of the rib plate (A) is connected with the inner side face of the connecting section bar (200).

4. The internal corner aluminum alloy form of claim 3, wherein: the connecting section bar (200) is divided into a first section (202) and a second section (203), one end of the first section (202) connected with the second section (203) is provided with a first inclined plane (202a), one end of the second section (203) connected with the first section (202) is provided with a second inclined plane (203a), and the first inclined plane (202a) is parallel to the second inclined plane (203 a).

5. The internal corner aluminum alloy form of claim 4, wherein: the first inclined surface (202a) is connected with a first inclined end surface (300), the first inclined end surface (300) is provided with a first inclined boss (301), and the first inclined boss (301) is embedded into the first inclined surface (202 a).

6. The internal corner aluminum alloy form of claim 5, wherein: the second inclined surface (203a) is connected with a second inclined end surface (400), the second inclined end surface (400) is provided with a second inclined boss (401), and the second inclined boss (401) is embedded into the second inclined surface (203 a).

7. The internal corner aluminum alloy form of claim 6, wherein: the first inclined end face (300) is provided with a first hole (302), the second inclined end face (400) is provided with a second hole (402), and the first hole (302) is connected with the second hole (402) through a bolt.

8. The internal corner aluminum alloy form of claim 6 or 7, wherein: the connecting boss (102) is connected with the connecting section bar (200) through friction stir welding, and the first inclined boss (301), the second inclined boss (401) are connected with the connecting section bar (200) through friction stir welding.

9. The processing method of the aluminum alloy internal corner template is characterized by comprising the following steps of:

adding liquid or semi-solid alloy into a die, and manufacturing a connecting end surface (100) by adopting a die-casting mode;

embedding a connecting boss (102) of a connecting end face (100) into the end part of a connecting section bar (200);

connecting the joint of the connecting boss (102) and the connecting section (200) by adopting a friction stir welding mode;

embedding a first inclined boss (301) into the first inclined surface (202a), and connecting the joint parts in a friction stir welding manner;

the second inclined boss (401) is embedded into the second inclined surface (203a), and the joint parts are connected in a friction stir welding mode.

Technical Field

The invention relates to the field of aluminum alloy internal corner templates, in particular to an aluminum alloy internal corner template and a processing method thereof.

Background

The easily-disassembled aluminum alloy internal corner template is mainly used for connecting two wall templates and the internal corner template and the internal corner template; the main body of the traditional aluminum alloy easily-detachable internal corner template is generally formed by cutting an aluminum profile, two end plates are formed by punching aluminum plates and are connected and formed by an electric fusion welding method. The method of electric fusion welding has the advantages of low process efficiency, high energy consumption, great pollution of photoelectricity and smoke generated in the process of electric fusion welding to the environment, and is unfavorable and environment-friendly. In addition, by adopting the electric fusion welding process, various defects such as slag inclusion, holes, incomplete penetration, large welding thermal stress and the like are easily generated at the welding seam of the template; therefore, the service life of the traditional aluminum alloy internal corner template is generally very short, and the use times are relatively few.

Disclosure of Invention

This section is for the purpose of summarizing some aspects of embodiments of the invention and to briefly introduce some preferred embodiments, and in this section as well as in the abstract and the title of the invention of this application some simplifications or omissions may be made to avoid obscuring the purpose of this section, the abstract and the title of the invention, and such simplifications or omissions are not intended to limit the scope of the invention.

The present invention has been made keeping in mind the above problems occurring in the prior art and/or the problems occurring in the prior art.

Therefore, the technical problem to be solved by the invention is that the main body of the traditional aluminum alloy easily-disassembled female corner template adopts an electric fusion welding method, the working procedure efficiency is very low, the energy consumption is high, the pollution of photoelectricity and smoke generated in the electric fusion welding process to the environment is large, and the method is unfavorable and environment-friendly. In addition, by adopting the electric fusion welding process, various defects such as slag inclusion, holes, incomplete penetration, large welding thermal stress and the like are easily generated at the welding seam of the template.

In order to solve the technical problems, the invention provides the following technical scheme: the utility model provides an aluminum alloy reentrant corner template, includes, connects the terminal surface, including the end panel, the end panel is provided with along the periphery and connects the boss, the end panel with connect boss integrated into one piece. The connecting boss is embedded into the connecting section, and the outer side face of the connecting boss is in contact with the inner side face of the connecting section.

As a preferable scheme of the aluminum alloy internal corner template, the aluminum alloy internal corner template comprises the following components in percentage by weight: the connecting section bar is characterized in that a protrusion extending along the length direction is arranged on the inner side of the connecting section bar, a groove is formed in the connecting boss, and the protrusion is embedded into the groove.

As a preferable scheme of the aluminum alloy internal corner template, the aluminum alloy internal corner template comprises the following components in percentage by weight: and rib plates are arranged in the connecting section, and the outer edges of the rib plates are connected with the inner side surfaces of the connecting section.

As a preferable scheme of the aluminum alloy internal corner template, the aluminum alloy internal corner template comprises the following components in percentage by weight: the connecting section bar is divided into a first section and a second section, one end of the first section, which is connected with the second section, is provided with a first inclined plane, one end of the second section, which is connected with the first section, is provided with a second inclined plane, and the first inclined plane is parallel to the second inclined plane.

As a preferable scheme of the aluminum alloy internal corner template, the aluminum alloy internal corner template comprises the following components in percentage by weight: the first inclined surface is connected with a first inclined end surface, the first inclined end surface is provided with a first inclined boss, and the first inclined boss is embedded into the first inclined surface; the second inclined plane is connected with a second inclined end face, the second inclined end face is provided with a second inclined boss, and the second inclined boss is embedded into the second inclined plane.

As a preferable scheme of the aluminum alloy internal corner template, the aluminum alloy internal corner template comprises the following components in percentage by weight: the first inclined end face is provided with a first hole, the second inclined end face is provided with a second hole, and the first hole is connected with the second hole through a bolt.

As a preferable scheme of the aluminum alloy internal corner template, the aluminum alloy internal corner template comprises the following components in percentage by weight: the connecting boss is provided with a third hole, a fourth hole is formed in the connecting section, and the third hole is connected with the fourth hole through a bolt.

As a preferable scheme of the aluminum alloy internal corner template, the aluminum alloy internal corner template comprises the following components in percentage by weight: the connection boss is provided with the third hole, be provided with a plurality of fourth hole on the connection section bar, the third hole passes through bolted connection with the fourth hole, first slope boss, second slope boss all are provided with the connecting hole, the fourth hole passes through bolted connection with the connecting hole.

As a preferable scheme of the aluminum alloy internal corner template, the aluminum alloy internal corner template comprises the following components in percentage by weight: the connecting boss is connected with the connecting section bars through friction stir welding, and the first inclined boss and the second inclined boss are connected with the connecting section bars through friction stir welding.

The invention also provides a processing method of the internal corner template, wherein the processing method comprises the following steps: the method comprises the following steps:

adding the liquid or semi-solid alloy into a die, and manufacturing a connecting end face by adopting a die-casting mode;

embedding the connecting boss of the connecting end face into the end part of the connecting section bar;

connecting the joint parts of the connecting lug bosses and the connecting section bars in a friction stir welding manner;

embedding a first inclined boss into the first inclined surface, and connecting the joint parts in a friction stir welding manner;

and embedding the second inclined boss into the second inclined surface, and connecting the joint parts in a friction stir welding manner.

The invention has the beneficial effects that: the internal corner end plate is formed by a pressure casting method, a complex structure can be formed, meanwhile, the structural rigidity of the product is high, the production cost is low, the lug boss extending out of the internal corner end plate can increase the welding contact area to carry out friction stir welding, and the strength of the internal corner template is improved.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without inventive exercise. Wherein:

fig. 1 is a schematic structural view of a reentrant corner end plate in an aluminum alloy reentrant corner template according to an embodiment of the present invention;

FIG. 2 is a schematic structural view of a female die plate in the female die plate of an aluminum alloy according to an embodiment of the present invention;

FIG. 3 is a schematic structural view of a protrusion and a groove in an aluminum alloy internal corner template according to an embodiment of the present invention;

fig. 4 is a schematic structural view of an easily detachable internal corner mold plate in an aluminum alloy internal corner mold plate according to an embodiment of the present invention;

fig. 5 is a schematic structural view illustrating a detachable internal corner mold plate of an aluminum alloy internal corner mold plate according to an embodiment of the present invention;

fig. 6 is an exploded schematic view of an easy-to-disassemble internal corner mold plate in an internal corner mold plate of an aluminum alloy according to an embodiment of the present invention;

fig. 7 is a schematic structural view of an easy-to-detach internal corner mold plate in an aluminum alloy internal corner mold plate according to an embodiment of the present invention, which is connected by welding.

Detailed Description

In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below.

In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, but the present invention may be practiced in other ways than those specifically described and will be readily apparent to those of ordinary skill in the art without departing from the spirit of the present invention, and therefore the present invention is not limited to the specific embodiments disclosed below.

Next, the present invention will be described in detail with reference to the drawings, wherein the cross-sectional views illustrating the structure of the device are not enlarged partially according to the general scale for convenience of illustration when describing the embodiments of the present invention, and the drawings are only examples, which should not limit the scope of the present invention. In addition, the three-dimensional dimensions of length, width and depth should be included in the actual fabrication.

Further, reference herein to "one embodiment" or "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one implementation of the invention. The appearances of the phrase "in one embodiment" in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments.

Example 1

Referring to fig. 1, the present embodiment provides an aluminum alloy reentrant corner end plate, which includes a connection end surface 100, wherein the connection end surface 100 is installed at the end of the reentrant corner template profile, and includes an end surface plate 101, and the end surface plate 101 is in the shape of a plane plate, wherein the end surface plate 101 can be placed in the inner cavity of the profile to facilitate connection.

Further, the end plate 101 is provided with a connection boss 102 along the periphery, preferably, the range of the connection boss 102 is consistent with the cross section of the section bar to be connected, and the end plate 101 and the connection boss 102 are integrally formed, so that the connection area of the end plate 101 can be increased when the end plate is connected with the section bar. The connecting end surface 100 is integrally formed by press casting, and has advantages of high productivity, high product dimensional accuracy and the like.

Example 2

Referring to fig. 1 to 3, a second embodiment of the present invention is based on the previous embodiment, and is different from the previous embodiment in that: the embodiment provides an inside corner formwork, which comprises a connecting end surface 100 and a connecting section bar 200, wherein the connecting section bar 200 is a common aluminum alloy section bar in the inside corner formwork, the cross section of the connecting section bar is similar to a C shape, and the connecting section bar is composed of four planes, namely, an opening is formed, and the connecting section bar is installed by being deviated from the operation; wherein, the connection boss 102 is embedded in the connection section bar 200, and the outer side surface of the connection boss 102 is contacted with the inner side surface of the connection section bar 200. Therefore, the connecting boss 102 is integrally installed in the connecting section bar 200, the connecting area is increased, and the end panel 101 and the end part of the connecting section bar 200 are positioned on the same plane, so that the connecting boss can be conveniently connected with other internal corner modules.

The inner side of the connecting section bar 200 is provided with a bulge 201 extending along the length direction, and the bulge 201 is used as a reinforcing rib and is arranged at the inner side of the connecting section bar 200 and is in a long strip shape; the connecting boss 102 is provided with a groove 102a, the size of the groove 102a can just accommodate the protrusion 201, and the protrusion 201 is embedded into the groove 102a, so that the strength can be increased during connection.

Further, if the length of the connecting section bar 200 is relatively long, a rib plate a is arranged in the connecting section bar 200, the outer edge of the rib plate a is connected with the inner side face of the connecting section bar 200, and the rib plate a is shaped in such a way that the periphery of the rib plate a can be welded in the connecting section bar 200 just, so that the strength of the whole internal corner formwork is increased by the rib plate a and the bulge 201 which are added in the connecting section bar 200, and deformation is prevented during construction.

Example 3

Referring to fig. 4 to 6, a third embodiment of the present invention is based on the first embodiment, and is different from the previous embodiment in that: this embodiment provides an easy reentrant corner template of tearing, specifically is: the connecting end face 100 and the connecting section bar 200 are included, wherein the connecting section bar 200 is a common aluminum alloy section bar in a female corner template, the cross section of the connecting section bar is similar to a C shape, and the connecting section bar is composed of four planes, namely, an opening is formed, and the connecting section bar is installed in a deviation mode; wherein, the connection boss 102 is embedded in the connection section bar 200, and the outer side surface of the connection boss 102 is contacted with the inner side surface of the connection section bar 200. Therefore, the connecting boss 102 is integrally installed in the connecting section bar 200, the connecting area is increased, and the end panel 101 and the end part of the connecting section bar 200 are positioned on the same plane, so that the connecting boss can be conveniently connected with other internal corner modules.

The inner side of the connecting section bar 200 is provided with a bulge 201 extending along the length direction, and the bulge 201 is used as a reinforcing rib and is arranged at the inner side of the connecting section bar 200 and is in a long strip shape; the connecting boss 102 is provided with a groove 102a, the size of the groove 102a can just accommodate the protrusion 201, and the protrusion 201 is embedded into the groove 102a, so that the strength can be increased during connection.

Further, the connecting section bar 200 is divided into a first section 202 and a second section 203, that is, one connecting section bar 200 is divided into two parts from the middle part, and the divided position is an inclined plane; wherein, the end of the first section 202 connected with the second section 203 is provided with a first inclined surface 202a, the end of the second section 203 connected with the first section 202 is provided with a second inclined surface 203a, and the first inclined surface 202a is parallel to the second inclined surface 203a, so that the first section 202 and the second section 203 can be completely matched when being connected.

The first inclined surface 202a is connected with a first inclined end surface 300, the first inclined end surface 300 is adapted to the first inclined surface 202a, a flat plate part of the first inclined end surface 300 can be just placed in an opening of the first inclined end surface 300, the first inclined end surface 300 is provided with a first inclined boss 301, the first inclined end surface 300 and the first inclined boss 301 are also integrally formed through pressure casting, and the first inclined boss 301 can also be completely contacted and attached with the inner side of the first inclined surface 202 a.

Correspondingly, the first inclined boss 301 is embedded in the first inclined surface 202 a; the second inclined plane 203a is connected with a second inclined end face 400, the second inclined end face 400 is integrally formed by die casting, the second inclined end face 400 is provided with a second inclined boss 401, the second inclined end face 400 is a plane plate, the second inclined boss 401 is a boss formed around the periphery of the second inclined end face 400, the second inclined end face 400 coincides with the end face of the second inclined plane 203a, and the second inclined boss 401 is embedded into the second inclined plane 203a and is fixedly connected with the second inclined plane 203a through friction stir welding, friction stir welding or bolt connection.

The first inclined end face 300 is provided with a first hole 302, the second inclined end face 400 is provided with a second hole 402, the first hole 302 is connected with the second hole 402 through bolts, so that the connecting section bar 200 is divided into two sections and then connected through the first inclined end face 300 and the second inclined end face 400, and the first inclined face 202a and the second inclined face 203a are both inclined end faces, so that the formwork is easy to remove after concrete is poured.

Example 4

Referring to fig. 7, a fourth embodiment of the present invention is based on the second and third embodiments, and is different from the previous embodiment in that:

the connecting boss 102 is connected with the connecting section bar 200 by friction stir welding, wherein the longitudinal edge of the connecting boss 102 is welded with the longitudinal edge of the connecting section bar 200 by friction stir welding, and the operation is as follows: the stirring head rotating at high speed is inserted between the longitudinal edge of the connecting boss 102 and the longitudinal edge of the connecting section bar 200 and then moves along the welding direction, friction heat is generated at the contact part of the stirring head and the workpiece to enable the metal around the stirring head to form a plastic softening layer, the softening layer metal fills a cavity formed behind the stirring head under the action of rotation of the stirring head, the solid-state welding of materials is realized under the action of shaft shoulder extrusion of the stirring head, the performance of a welding seam can approach or even exceed the performance of a base metal, the welding is carried out between the side surface of the connecting section bar 200 and the side surface of the connecting boss 102 through friction stir spot welding, the stirring head does not need to move left and right after being pricked into a workpiece, the contact part of the workpiece to be connected and the stirring head generates friction heat to enable the surrounding metal to form a plastic softening layer, and the softening layer metal is fully mixed together under the action of the rotation of the stirring head to realize the solid-state welding of the materials; correspondingly, the first inclined boss 301, the second inclined boss 401 and the connecting profile 200 are connected by friction stir welding, wherein the welding method is also consistent with the welding of the connecting boss 102.

In the embodiment, the concave and convex matching positioning is combined with the friction stir welding connection method, so that the welding defect of the traditional electrofusion welding aluminum template can not occur; meanwhile, the welding temperature of friction stir welding is much lower than that of electric fusion welding, so that the welding thermal stress is small, the workpiece is not easy to deform, and the service life of the template can be greatly prolonged.

Example 5

In a fifth embodiment of the present invention, which is based on the above embodiment, there is provided a method for processing a reentrant corner template, including the steps of:

s1: adding liquid or semi-solid alloy into a die, and manufacturing a connecting end surface 100 by adopting a die-casting mode;

s2: embedding the connecting boss 102 of the connecting end face 100 into the end of the connecting section bar 200;

s3: connecting the joint of the connecting boss 102 and the connecting section bar 200 by adopting a friction stir welding mode;

s4: embedding the first inclined boss 301 into the first inclined surface 202a, and connecting the joint parts in a friction stir welding manner;

s5: the second inclined boss 401 is fitted into the second inclined surface 203a, and the bonded portions are connected by friction stir welding.

The connecting end face 100 has a special structural design, liquid or semi-solid alloy is added into a die, and the connecting end face 100 is manufactured in a die casting mode, because the shapes of the end face plate 101 and the connecting boss 102 are adapted to subsequent welding work; in the embodiment, the friction stir welding or friction stir spot welding mode has the characteristics of extremely low energy consumption, environmental friendliness, small welding thermal stress, difficult deformation of workpieces and the like compared with the traditional capacitance welding mode, and the economic benefit is higher in the actual operation process.

It should be noted that, the traditional internal corner template structure is generally formed by cutting an aluminum profile, the end plates at two ends are thin plates, the thin plate parts are thin, and meanwhile, the internal corner template structure is a hollow structure, cannot be connected with the connecting profile 200 by friction stir welding, and can only be carried out by adopting an electric fusion welding process, so that the connection strength of the whole internal corner template is not enough, and the internal corner template is easy to damage in a long-time use process; in the prior art, if a friction stir welding mode is adopted, a boss needs to be additionally welded on a structural body, and the processing and transportation cost is greatly increased. In the embodiment, the connecting end face 100 is formed by die casting, is made of liquid or semi-solid alloy, and can be processed into specifications and sizes suitable for friction stir welding during forming, each end face can be bent by ninety degrees directly during processing, the convenience and the stability during welding are improved, the connecting section bar 200 is generally made of 6061 aluminum alloy, meanwhile, for connection of different materials, reliable connection cannot be performed by traditional welding modes such as capacitance welding, and the friction stir welding adopted in the invention can stably connect the two materials.

The connecting end face 100 is formed by die-casting, so that the thickness of the end face plate 101 and the thickness of the connecting boss 102 can be guaranteed, the quality of the whole structure body can be reduced as far as possible on the premise that the whole bearing effect of the end internal corner template is not influenced, then the connecting boss 102 and the connecting section bar 200 are welded in a friction stir welding mode, the whole rigidity of the internal corner template is improved, and the service life of the internal corner template is prolonged.

It is important to note that the construction and arrangement of the present application as shown in the various exemplary embodiments is illustrative only. Although only a few embodiments have been described in detail in this disclosure, those skilled in the art who review this disclosure will readily appreciate that many modifications are possible (e.g., variations in sizes, dimensions, structures, shapes and proportions of the various elements, values of parameters (e.g., temperatures, pressures, etc.), mounting arrangements, use of materials, colors, orientations, etc.) without materially departing from the novel teachings and advantages of the subject matter recited in this application. For example, elements shown as integrally formed may be constructed of multiple parts or elements, the position of elements may be reversed or otherwise varied, and the nature or number of discrete elements or positions may be altered or varied. Accordingly, all such modifications are intended to be included within the scope of this invention. The order or sequence of any process or method steps may be varied or re-sequenced according to alternative embodiments. In the claims, any means-plus-function clause is intended to cover the structures described herein as performing the recited function and not only structural equivalents but also equivalent structures. Other substitutions, modifications, changes and omissions may be made in the design, operating conditions and arrangement of the exemplary embodiments without departing from the scope of the present inventions. Therefore, the present invention is not limited to a particular embodiment, but extends to various modifications that nevertheless fall within the scope of the appended claims.

Moreover, in an effort to provide a concise description of the exemplary embodiments, all features of an actual implementation may not be described (i.e., those unrelated to the presently contemplated best mode of carrying out the invention, or those unrelated to enabling the invention).

It should be appreciated that in the development of any such actual implementation, as in any engineering or design project, numerous implementation-specific decisions may be made. Such a development effort might be complex and time consuming, but would nevertheless be a routine undertaking of design, fabrication, and manufacture for those of ordinary skill having the benefit of this disclosure, without undue experimentation.

It should be noted that the above-mentioned embodiments are only for illustrating the technical solutions of the present invention and not for limiting, and although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions may be made on the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, which should be covered by the claims of the present invention.

11页详细技术资料下载
上一篇:一种医用注射器针头装配设备
下一篇:一种厨卫混凝土防水导墙浇筑模板及施工方法

网友询问留言

已有0条留言

还没有人留言评论。精彩留言会获得点赞!

精彩留言,会给你点赞!