CN112122553A - Core clamping and pressing method and clamping and pressing device thereof - Google Patents
Core clamping and pressing method and clamping and pressing device thereof Download PDFInfo
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- CN112122553A CN112122553A CN202010990995.6A CN202010990995A CN112122553A CN 112122553 A CN112122553 A CN 112122553A CN 202010990995 A CN202010990995 A CN 202010990995A CN 112122553 A CN112122553 A CN 112122553A
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- core
- pressing
- vertical
- vertical guide
- clamping
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C9/00—Moulds or cores; Moulding processes
- B22C9/10—Cores; Manufacture or installation of cores
- B22C9/108—Installation of cores
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Molds, Cores, And Manufacturing Methods Thereof (AREA)
Abstract
The core clamping and pressing device fixes a core at a determined position through a pressing part, so that the core which is formed by assembly cannot displace or cause metal liquid overflow, fire running and the like due to the expansive force of the metal liquid in the casting process, good mold filling and condensation of the metal liquid in a cavity of the core are ensured, and the naked casting of a casting is realized. Through the implementation of the technical scheme, two processes of manufacturing a sand box and embedding the sand box are omitted in the casting process of the casting, so that the process flow of casting production is shortened, the corresponding manufacturing cost and time are saved, and the production efficiency is improved.
Description
Technical Field
The invention relates to a clamping and pressing device for casting, in particular to a clamping and pressing method and a clamping and pressing device for a core bag in a bare casting process.
Background
Casting is a method in which liquid metal is cast into a casting cavity that conforms to the shape of a part, and after it is cooled and solidified, a part or a blank is obtained. In the existing production process, after the manufactured sand core and sand mold or modeling are subjected to core assembly, a sand box is sleeved on the periphery, the sand is filled in the sand box and is compacted, and then the sand box is compacted at the upper part and then is cast. The sand box or the sand box frame required by products with different specifications is specially manufactured in the process, so that the operation not only prolongs the production efficiency, but also increases the manufacturing cost of each product, and the castings are mostly produced in a single piece mode, so that the waste is more likely to occur. In order to avoid the process delay and cost increase caused by manufacturing the sand core, the currently adopted technology is the box-free casting, namely the naked casting. However, at present, the weight of products produced by bare casting is smaller, generally less than 100kg, and a small clamp, such as a screw four-corner clamp, needs to be matched. With the 3DP printing technology in the casting area, cores for medium castings have been printed indirectly, which saves the cost of sand cores and sand molds, but still requires core-embedding boxes after core assembly, and sand boxes to provide the core package with forces that counter the hydraulic expansion forces.
Disclosure of Invention
In view of the problems of large sand-iron ratio, long manufacturing period and high production cost caused by adopting the sand box to fasten the core, a core clamping and pressing method and a clamping and pressing device thereof are needed, and the core clamping and pressing device replaces the fastening effect of the sand box on the core and realizes the bare casting of the casting.
A core clamping and pressing method is characterized in that a core is fixed at a determined position through a pressing part, so that the assembled and molded core cannot be displaced or cause overflow, fire escape and the like of molten metal due to the expansion force of the molten metal in the casting process, good mold filling and condensation of the molten metal in a cavity of the core are guaranteed, and the casting is cast in a naked mode. For example, the pressing portion may be a mechanical structure having a pressing function, such as a mechanical press handle, and the upper end surface and/or the four side walls of the core are pressed and/or tightened by the pressing portion, so that the components of the core are in a certain position, and cannot be displaced relatively and cannot exceed a set contour range of the core.
More specifically, the clamping and/or pressing force of the pressing part on the core is only used for maintaining the core in a certain position without applying extra pressure on the core, or the purpose of the pressing part is to make the core ring stay in the range of the outer contour of the core, or the terminal position of the pressing part stays on the outer contour surface of the core, and the pressing part has certain maintaining force to prevent the terminal of the pressing part from shaking, shifting and the like caused by the expansion force of molten metal, namely the clamping or pressing force is equal to the expansion force of the molten metal on the core in the processes of filling and condensing.
Specifically, the pressing part is provided with a vertical pressing hand or/and a transverse pressing hand. The vertical pressing hand acts on the upper end face of the core, and the vertical pressing hand replaces the existing pressing iron, locking screw rods and the like to provide downward pressing force for the core, so that the core is prevented from being lifted in the molten metal filling and condensing processes, and fire running or overlarge casting size deviation caused by the fact that the core is lifted is avoided. The transverse pressing hands act on the four side walls of the core, and the transverse pressing hands provide horizontal tightening force perpendicular to the side walls, so that the core is prevented from outwards shifting in the molten metal filling and condensing processes, and the problems that the size deviation of a casting caused by shifting of all blocks of the core exceeds the standard, a flash is too large and the like are solved.
The technical effect of the technical scheme is as follows: through the implementation of the technical scheme, two processes of manufacturing a sand box and embedding the sand box are omitted in the casting process of the casting, so that the process flow of casting production is shortened, the corresponding manufacturing cost and time are saved, and the production efficiency is improved.
Drawings
FIG. 1 is a schematic view of a core chucking apparatus;
in the figure, 100-frame; 101-a column; 102-a beam; 103-vertical guide rails; 200-vertical hand pressing; 300-pressing the hand transversely; 400-a drive section; 401-driving the slider; 402-a drive member; 403-transmission piece.
Detailed Description
In order to more clearly illustrate the technical solution of the present invention, the detailed description will be given according to the embodiments of the drawings, and it is obvious that the drawings in the following description are some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
In order to practically apply the core chucking method of the present invention to production, a core chucking apparatus as described below is designed according to the core chucking method.
The first embodiment is as follows:
this embodiment still adopts modes such as current swage iron, locking screw to realize compressing tightly the vertical direction of core based on the core, and the new increase is to the horizontal tightening force of core to avoid the displacement of core on the horizontal direction.
A core clamping and pressing device comprises a pressing part, wherein the pressing part comprises a transverse pressing hand 300, and the transverse pressing hand 300 is a strip bundled on the side wall of a core.
The lateral pressing hand 300 is provided with a plurality of strips according to the height of the core, namely, the strip-shaped lateral pressing hand 300 bundled on the side wall of the core is uniformly and equidistantly distributed on the side wall of the core, or the strip-shaped lateral pressing hand 300 is provided with the strips at the position needing to be tightened according to the structure of the outer contour of the core. In this embodiment, the lateral pressing hand 300 is a steel band, and four steel bands are provided on the sidewall of the core in order to clamp the core more effectively. Preferably, in order to improve the gripping force of the steel strips, wedge blocks are inserted into the plane of each bundled steel strip, which is in plane contact with the mandrel, so as to increase the tightness of the steel strips. Meanwhile, the steel belt can be suitable for the condition that the side wall of the core is not planar, and the application range of the core clamping and pressing device is expanded. The lateral press hand 300 in the form of a strip is only suitable for casting castings weighing up to 100kg, due to the limited bundling capacity of the steel strip.
Example two:
this embodiment adopts vertical pressure hand 200 to replace modes such as current swage iron, locking screw, realizes compressing tightly the vertical direction of core to increase the horizontal tightening force to the core. The parts of the lateral pressing hand 300 already described in the first embodiment are not described again.
The core clamping and pressing device comprises a frame 100, a vertical pressing hand 200, a transverse pressing hand 300 and a driving part 400, wherein the driving part 400 is arranged on the frame 100, and the frame 100 is arranged on the ground, so that the stability of the core clamping and pressing device is ensured; the vertical pressing hand 200 is connected with the driving part 400, and the driving part 400 drives the vertical pressing hand 200 to reciprocate in the vertical direction, so that the vertical direction of the mold core is pressed; the lateral press handle 300 is a strip tied on the side wall of the core, and the solid mold clamps the core in the horizontal direction.
The frame 100 comprises upright columns 101, cross beams 102 and vertical guide rails 103, wherein the four upright columns 101 are fixedly arranged on the ground, the upright columns 101 are provided with the cross beams 102, the cross beams 102 are arranged on the upright columns 101 in two groups, one group of the cross beams is arranged at the tops of the upright columns 101 and is a top cross beam, the other group of the cross beams is arranged in the middle of the upright columns 101 and is a middle cross beam, and the vertical guide rails 103 are arranged between the top cross beam and the middle cross beam.
The driving part 400 comprises a driving slider 401, a driving element 402 and a transmission element 403, wherein the driving slider 401 is arranged on the vertical guide rail 103 and can slide up and down along the vertical guide rail 103; the driving part 402 is arranged at one end of the vertical guide rail 103 close to the top cross beam, that is, the driving part 402 is arranged at the top of the vertical guide rail 103, and specifically is arranged on a cross bar on the vertical guide rail 103, that is, a cross bar is arranged at the top of the vertical guide rail 103 (that is, at one end close to the top cross beam), the driving part 402 is arranged on the cross bar, and the driving part 402 is used for driving the driving slider 401 to slide up and down along the vertical guide rail 103, so that the vertical presser 200 can move up and down to be suitable for cores with different heights; the transmission piece 403 is arranged on the driving slider 401, that is, the driving slider 401 drives the transmission piece 403 to move up and down along the vertical guide rail 103, that is, one end of the transmission piece 403 is connected to one end of the driving slider 401 close to the top cross beam, and the transmission piece 403 can also move left and right along the driving slider 401 in the horizontal direction; the other end of the transmission member 403 is connected with the vertical pressing hand 200, so that the vertical pressing hand 200 can avoid the casting process location of the upper end surface of the core. For the embodiment, the driving part 402 is a motor with a screw rod on an output shaft, the motor is mounted on a transverse rod, the screw rod is vertically downward and parallel to the upright post 101, the driving slider 401 passes through the screw rod and is bridged on the vertical guide rail 103, and the driving slider 401 is driven by the screw rod to move up and down along the vertical guide rail 103; the transmission member 403 is of a right-angled triangle frame structure, a long right-angled side of the right-angled triangle frame is parallel to the vertical guide rail 103, and one end of the long right-angled side, which is far away from the short right-angled side, is fixedly connected to the driving slider 401, so that the transmission member 403 and the driving slider 401 move synchronously, and the short right-angled side is the tail end of the transmission member 403.
Preferably, two transmission elements 403 are symmetrically arranged on the drive slide 401, i.e. the transmission elements 403 are arranged in groups, so that the pressing force on the upper end face of the core is more uniform and balanced. The number of the vertical pressing hands 200 corresponds to the number of the transmission pieces 403, and each transmission piece 403 is provided with one vertical pressing hand 200.
Preferably, a second driving element is further disposed on the driving slider 401, and the second driving element is used for adjusting the distance between the two transmission elements 403, so as to be suitable for cores with different sizes, and also can relatively adjust the position of each transmission element 403 according to the setting of casting process locations such as a gate, a dead head and the like on the upper end surface of the core, that is, change the distance between the two transmission elements 403, and finally change the pressing position of the vertical pressing hand 200 relative to the upper end surface of the core.
The vertical presser 200 is attached to the end of the transmission 403 to act on the upper end face of the core. The vertical pressure arm 200 is a rectangular strip structure horizontally arranged at the tail end of the transmission member 403, so that the maximum area of the vertical pressure arm can be contacted with the upper end surface of the mold core, and the best pressure-bearing effect can be obtained. In the case of the present embodiment, there are two transmission members 403, and there are two vertical pressing hands 200, and in the case that a casting process gate, a riser, etc. are disposed in the middle of the upper end surface of the core, the two vertical pressing hands 200 may press on the upper end surface of the core around the casting process area such as the gate, the riser, etc. so as to realize symmetrical and balanced pressing on the core. More specifically, the vertical press handle 200 may be made of H-shaped steel.
The lateral pressing hand 300 is provided with a plurality of strips according to the height of the core, namely, the strip-shaped lateral pressing hand 300 bundled on the side wall of the core is uniformly and equidistantly distributed on the side wall of the core, or the strip-shaped lateral pressing hand 300 is provided with the strips at the position needing to be tightened according to the structure of the outer contour of the core. In this embodiment, the lateral pressing hand 300 is a steel band, and four steel bands are provided on the sidewall of the core in order to clamp the core more effectively. Preferably, in order to improve the gripping force of the steel strips, wedge blocks are inserted into the plane of each bundled steel strip, which is in plane contact with the mandrel, so as to increase the tightness of the steel strips. Meanwhile, the steel belt can be suitable for the condition that the side wall of the core is not planar, and the application range of the core clamping and pressing device is expanded. The lateral press hand 300 in the form of a strip is only suitable for casting castings weighing up to 100kg, due to the limited bundling capacity of the steel strip.
As an optimization of this embodiment, depending on the width of the cross beam 102 or depending on the width/span of the frame 100, the vertical guide rails 103 may be provided with several groups side by side on the cross beam 102, for example, one group, two groups or three groups may be provided for the vertical guide rails 103, and in this embodiment, two groups are provided for the vertical guide rails 103. When the vertical guide rails 103 are provided with a plurality of groups, each group of vertical guide rails 103 can be provided with one set of the driving part 400, so that one frame 100 can be provided with a plurality of sets of the driving part 400, the vertical pressing hand 200 and the transverse pressing hand 300 configured according to different use objects, the purpose of clamping and pressing a plurality of cores on a station of one frame 100 is realized, cores of various different types can be clamped and pressed on the same station is also realized, the production of various and single castings is met, and the production efficiency is improved while the utilization rate of unit area is improved.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
Claims (9)
1. A core clamping and pressing method is characterized in that a core is fixed at a determined position through a transverse pressing hand or/and a vertical pressing hand, so that the assembled and formed core cannot be displaced due to the expansion force of molten metal in the casting process.
2. The core chucking method as claimed in claim 1, wherein said lateral presser and/or vertical presser clamp said core by a clamping force and/or a pressing force applied to an upper end face and/or a wall of said core, and said pressing force or clamping force is equal to an expansion force of the molten metal.
3. The die core clamping and pressing device is characterized by comprising a frame, a driving part and a pressing part, wherein the pressing part comprises a vertical pressing hand and a transverse pressing hand; the frame sets up subaerial, the drive division sets up on the frame, vertical pressure hand with the drive division links to each other, horizontal pressure hand with vertical pressure hand links to each other.
4. The core chucking apparatus of claim 3, wherein said frame comprises uprights, cross-members and vertical guide rails; four upright posts are arranged and are respectively arranged on the ground; the cross beam is bridged between the stand columns and is provided with a top cross beam and a middle cross beam; the vertical guide rail is disposed between the top cross member and the middle cross member.
5. The core chucking apparatus of claim 4, wherein said drive section includes a drive slide, a drive member, and a transmission member; the driving sliding block is arranged on the vertical guide rail and can slide along the vertical guide rail; the driving piece is arranged on a cross bar at the top of the vertical guide rail and used for driving the driving sliding block to slide along the vertical guide rail; the transmission part is arranged on the driving sliding block and moves up and down along with the sliding of the driving sliding block along the vertical guide rail.
6. The core chucking apparatus of claim 5 wherein said drive members are symmetrically disposed in two and a second drive member is disposed between said two drive members, said second drive member being adapted to adjust the relative distance between said two drive members.
7. The mandrel press of claim 3 wherein said lateral press handle is a strip strapped to the sidewall of the mandrel.
8. The mandrel jam as recited in claim 7 wherein said strip is a steel strip having a plurality of strips.
9. The core chucking apparatus as recited in any of claims 3-8, wherein said driving portion is provided with a plurality of sets.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010990995.6A CN112122553A (en) | 2020-09-23 | 2020-09-23 | Core clamping and pressing method and clamping and pressing device thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010990995.6A CN112122553A (en) | 2020-09-23 | 2020-09-23 | Core clamping and pressing method and clamping and pressing device thereof |
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| Publication Number | Publication Date |
|---|---|
| CN112122553A true CN112122553A (en) | 2020-12-25 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010990995.6A Pending CN112122553A (en) | 2020-09-23 | 2020-09-23 | Core clamping and pressing method and clamping and pressing device thereof |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103769547A (en) * | 2014-02-26 | 2014-05-07 | 苏州明志科技有限公司 | Self-floating type clamp iron for limiting core assembly pouring device |
| CN107470558A (en) * | 2017-06-09 | 2017-12-15 | 浙江创建厨具有限公司 | A kind of casting mould of combination type core structure |
| CN109093076A (en) * | 2018-09-30 | 2018-12-28 | 广西玉柴机器股份有限公司 | A kind of locking method of sand core group |
| CN110369697A (en) * | 2019-08-26 | 2019-10-25 | 共享智能铸造产业创新中心有限公司 | Casting from dynamic pressure case apparatus |
| CN111085675A (en) * | 2019-12-25 | 2020-05-01 | 肇庆学院 | Sand mould casting platform |
| CN211191909U (en) * | 2019-10-22 | 2020-08-07 | 丹东瑞鼎铸造有限公司 | Device for sand core turnover |
| CN211304686U (en) * | 2019-10-08 | 2020-08-21 | 中国第一汽车股份有限公司 | Double-layer brake disc sand core |
-
2020
- 2020-09-23 CN CN202010990995.6A patent/CN112122553A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103769547A (en) * | 2014-02-26 | 2014-05-07 | 苏州明志科技有限公司 | Self-floating type clamp iron for limiting core assembly pouring device |
| CN107470558A (en) * | 2017-06-09 | 2017-12-15 | 浙江创建厨具有限公司 | A kind of casting mould of combination type core structure |
| CN109093076A (en) * | 2018-09-30 | 2018-12-28 | 广西玉柴机器股份有限公司 | A kind of locking method of sand core group |
| CN110369697A (en) * | 2019-08-26 | 2019-10-25 | 共享智能铸造产业创新中心有限公司 | Casting from dynamic pressure case apparatus |
| CN211304686U (en) * | 2019-10-08 | 2020-08-21 | 中国第一汽车股份有限公司 | Double-layer brake disc sand core |
| CN211191909U (en) * | 2019-10-22 | 2020-08-07 | 丹东瑞鼎铸造有限公司 | Device for sand core turnover |
| CN111085675A (en) * | 2019-12-25 | 2020-05-01 | 肇庆学院 | Sand mould casting platform |
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Application publication date: 20201225 |