CN112139460A - 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
- Publication number
- CN112139460A CN112139460A CN202010994323.2A CN202010994323A CN112139460A CN 112139460 A CN112139460 A CN 112139460A CN 202010994323 A CN202010994323 A CN 202010994323A CN 112139460 A CN112139460 A CN 112139460A
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- core
- pressing
- driving
- clamping
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C21/00—Flasks; Accessories therefor
- B22C21/12—Accessories
- B22C21/14—Accessories for reinforcing or securing moulding materials or cores, e.g. gaggers, chaplets, pins, bars
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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 are needed, and the core clamping and pressing device replaces the fastening effect of the sand box on the core and realizes the naked 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 or tightened by the pressing portion, so that the components of the core are in a certain position, and relative displacement does not occur, and the profile of the core does not exceed a set profile range.
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 and/or 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 die clamping apparatus;
FIG. 2 is a schematic view of another core chucking apparatus;
FIG. 3 is a schematic view of another core chucking apparatus;
FIG. 4 is a schematic view of a lateral thumb press;
in the figure, 100-frame; 101-a column; 102-a beam; 103-vertical guide rails; 200-an actuator; 300-pressing the hand transversely; 301-connecting arm; 302-a cinch; 303-pressing plate; 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 is provided with a transverse pressing hand 300, wherein the transverse pressing hand 300 comprises a clamping piece 302 and a pressing plate 303, the clamping piece 302 is threaded on the pressing plate 303, the pressing plate 303 is threaded into a whole, and the horizontal clamping of a core is realized by tightening the clamping piece 302.
Specifically, as shown in fig. 1 and 2, four pressure plates 303 are distributed at four corners of the core, and the pressure plates 303 are arranged as angle plates with a hinge structure, so as to be convenient to better fit the surface of the core and better clamp the core; the tightening member 302 threads the four platens 303 together, and tightening of the tightening member 302 achieves tightening of the mandrel in a horizontal direction. In one embodiment, the four hinge-type pressing plates 303 are arranged at the edges of the mold core, the four hinge-type pressing plates 303 are connected in a penetrating manner by adopting an annular soft rope, and the annular soft rope is tensioned and fastened tightly by adopting a chain block in the using process; in another embodiment, four hinge-type pressure plates 303 are arranged at the corners of the core, chain fasteners with adjustable distances are adopted between each hinge-type pressure plate 303 for cross connection, and the core can be clamped by selecting a proper chain fastener gear; in the embodiment shown in fig. 3, the pressing plate 303 is provided with four corner plates and four flat plates, the corner plates are arranged at the corners of the core, the flat plates are arranged at the side walls of the core, the four corner plates and the four flat plates are connected through the annular soft rope, and the annular soft rope is tightened and fastened by the locking members to complete the tightening of the core in the horizontal direction
Example two:
this embodiment adopts vertical pressure hand to replace modes such as current swage iron, locking screw, realizes compressing tightly the vertical direction of core to increase the horizontal cramping 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 transverse pressing hand 300 and a vertical pressing hand, wherein the vertical pressing hand comprises a frame 100, an actuating piece 200 and a driving part 400, 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 actuating member 200 is connected with the driving part 400, and the driving part 400 drives the actuating member 200 to reciprocate in the vertical direction, so that the vertical direction of the core is pressed; the transverse pressing hand 300 is connected with the driving part 400 to clamp 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 executing part 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 actuating member 200, so that the actuating member 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 actuating elements 200 corresponds to the number of the transmission elements 403, and each of the transmission elements 403 is provided with one of the actuating elements 200.
Preferably, a second driving member is further provided on the driving slider 401, and the second driving member is used for adjusting the distance between the two transmission members 403, so that the cores with different sizes can be adapted, and the position of each transmission member 403 can be relatively adjusted 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, the distance between the two transmission members 403 is changed, and the final purpose is to change the pressing position of the actuating member 200 relative to the upper end surface of the core.
The actuating member 200 is attached to the end of the transmission member 403 to act on the upper end face of the core. The actuating member 200 is a rectangular parallelepiped strip-shaped structure horizontally disposed at the end of the driving member 403, so that the actuating member can contact with the upper end surface of the mold core in the largest area, and the best pressure-bearing effect can be obtained. In the present embodiment, two transmission members 403 are provided, and two actuating members 200 are also provided, and in the case that a casting process gate, a riser and the like are provided in the middle of the upper end surface of the core, the two actuating members 200 can be pressed on the upper end surface of the core by bypassing the casting process region such as the gate and the riser, so as to realize symmetrical and balanced pressure application on the core. More specifically, the actuating member 200 may be made of H-shaped steel.
The transverse pressing hand 300 is connected with the vertical pressing hand through a connecting arm 301. Specifically, one end of the connecting arm 301 is disposed at the end of the transmission member 403, that is, the actuating member 200, and the other end of the connecting arm 301 is connected to the pressing plate 303; the clamping member 302 is threaded on the pressure plate 303, and the threaded pressure plate 303 can clamp the core by tightening or fastening the clamping member 302, namely, the pressure plate 303 has a clamping force capable of resisting the horizontal force of molten metal expansion. In order to facilitate the connection between the connecting arms 301 and the pressing plates 303, a plurality of connecting arms 301 are provided, that is, one connecting arm 301 and one pressing plate 303 are in one-to-one correspondence. As shown in fig. 1, one end of the connecting arm 301 connected to the actuator 200 may be a connecting rod, the connecting rod is fixedly connected to the actuator 200, and a flexible rope for connecting the pressing plate 303 is disposed on the connecting rod, that is, the pressing plate 303 is hung on the connecting rod, or the pressing plate 303 is hung on the connecting arm 301.
As an improved technical solution, depending on the width of the cross beam 102 or the width/span of the frame 100, the vertical guide rails 103 may be provided with a plurality of 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 the 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 executing part 200 and the transverse press handle 300 which is configured according to different use objects, the purpose that a plurality of cores can be clamped and pressed on a station of one frame 100 is achieved, cores of various different types can be clamped and pressed on the same station is also achieved, 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 (13)
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 transverse pressing hand, wherein the transverse pressing hand comprises a clamping piece and a pressing plate, and the clamping piece is connected to the pressing plate in a penetrating mode.
4. The core chucking apparatus of claim 3 wherein said cinch member is a looped cord, each of said platens being threaded with said looped cord.
5. The core chucking apparatus of claim 3 wherein said cinch member is a distance adjustable link with which each said hold-down plate is threaded.
6. A mandrel press according to any of claims 3 to 5 wherein said platen is provided at least one at each corner of the mandrel and the platens provided at said corners are hinge gussets.
7. The core chucking apparatus of claim 6, further comprising a flat plate type of said platen on said core side wall.
8. The core clamping and pressing device as claimed in claim 3, further comprising a vertical pressing hand, wherein the transverse pressing hand is connected with the vertical pressing hand through a connecting arm.
9. The core chucking apparatus of claim 8, wherein said vertical presser comprises a frame, a driving portion, and an actuator; the frame sets up subaerial, the drive division sets up on the frame, the executive component with the drive division links to each other.
10. The core chucking apparatus of claim 9, wherein said frame includes columns, beams and vertical 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.
11. The core chucking apparatus of claim 10, 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.
12. The core chucking apparatus of claim 11, wherein there are two of said driving members symmetrically, and a second driving member is provided between said two driving members, said second driving member being for adjusting the relative distance between said two driving members.
13. The core chucking apparatus as recited in any of claims 9-13 wherein said drive portion is provided with a plurality of sets.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010994323.2A CN112139460A (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 |
|---|---|---|---|
| CN202010994323.2A CN112139460A (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 |
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| CN112139460A true CN112139460A (en) | 2020-12-29 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010994323.2A Pending CN112139460A (en) | 2020-09-23 | 2020-09-23 | Core clamping and pressing method and clamping and pressing device thereof |
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| 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 |
| CN109365755A (en) * | 2018-09-19 | 2019-02-22 | 共享装备股份有限公司 | A kind of type core gripping mechanism |
| 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 |
| CN110976779A (en) * | 2019-11-29 | 2020-04-10 | 马鞍山市兴隆铸造有限公司 | Fixing device for core assembly |
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2020
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Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202105983U (en) * | 2011-06-01 | 2012-01-11 | 广西玉林市富源机械制造有限公司 | Core assembly mould for main bearing cover of diesel engine |
| CN105414487A (en) * | 2015-12-02 | 2016-03-23 | 安徽马钢重型机械制造有限公司 | Large loam core fixing method |
| CN106955974A (en) * | 2017-04-26 | 2017-07-18 | 宁夏共享模具有限公司 | A kind of group core for being used for vertically point core is loaded the core assembly method of system and its core |
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| CN208131934U (en) * | 2018-04-12 | 2018-11-23 | 王飞 | A kind of sandbox latch hook mechanism |
| CN108788021A (en) * | 2018-06-20 | 2018-11-13 | 四川共享铸造有限公司 | Core fastening device for assembling |
| CN109365755A (en) * | 2018-09-19 | 2019-02-22 | 共享装备股份有限公司 | A kind of type core gripping mechanism |
| 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 |
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Application publication date: 20201229 |
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