CN112170783B - Core cladding clamping and pressing method and clamping and pressing device thereof - Google Patents
Core cladding clamping and pressing method and clamping and pressing device thereof Download PDFInfo
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- CN112170783B CN112170783B CN202010992217.0A CN202010992217A CN112170783B CN 112170783 B CN112170783 B CN 112170783B CN 202010992217 A CN202010992217 A CN 202010992217A CN 112170783 B CN112170783 B CN 112170783B
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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
- B22C9/106—Vented or reinforced cores
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Abstract
The core package clamping and pressing device fixes a core package at a determined position through a pressing part, so that the core package which is assembled and molded can not displace or cause metal liquid overflow, fire running and the like due to the expansion force of the metal liquid in the casting process, the good filling and condensation of the metal liquid in a cavity of the core package 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 the cost increase caused by manufacturing the sand box, the technology adopted at present 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 application of 3DP printing technology in the casting field, cores of medium castings can already be printed indirectly, which saves the cost of sand cores and sand molds, but still requires core embedding boxes after assembling the cores and cores, and still requires sand boxes to provide the core package with a force which is mutually opposite to the metal liquid expansion force.
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 package, a core package clamping and pressing method and a core package clamping and pressing device are needed to be provided, the core package clamping and pressing device replaces the fastening effect of the sand box on the core package, and the casting is bare poured.
The core package is fixed at a determined position through a pressing part, so that the core package can not be displaced or cause metal liquid overflow, fire running and the like in the casting process of the core package which is assembled and molded, good mold filling and condensation of the metal liquid in a cavity of the core package are guaranteed, and the casting is naked. For example, the compressing portion may be a mechanical structure having a compressing function, such as a mechanical press handle, and the upper end surface and/or four side walls of the core package are compressed and/or tightened by the compressing portion, so that the components of the core package are at certain positions, and do not undergo relative displacement and do not exceed a set profile range of the core package.
More specifically, the tightening and/or pressing force of the pressing portion on the core package is only used to maintain the core package at a certain position without applying additional pressure on the core package, or the purpose of the pressing portion is to enclose the core package within the outer contour of the core package, or the end position of the pressing portion stays on the outer contour surface of the core package, and has a certain maintaining force to prevent the end of the pressing portion from shaking, shifting, etc. due to the expansion force of molten metal on the core package during filling and condensing, that is, the tightening or pressing force is equal to the expansion force of molten metal on the core package during 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 package, and replaces the existing pressing iron, locking screw rods and the like to provide downward pressing force for the core package, so that the core package is prevented from being lifted in the molten metal filling and condensing processes, and fire running or overlarge size deviation of a casting caused by the fact that the core package is lifted is avoided. The transverse pressing hands act on the four side walls of the core package, and the transverse pressing hands provide horizontal tightening force perpendicular to the side walls, so that the core package 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 package exceeds the standard, a flash is too large and the like are avoided.
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 mandrel pack clamping apparatus;
FIG. 2 is a schematic view of a lateral press handle;
in the figure, 100-frame; 101-a column; 102-a beam; 103-vertical guide rails; 200-an actuator; 300-pressing the hand transversely; 301-enclosing frame; 302-a positioning sleeve; 303-positioning blocks; 304-a compression sleeve; 305-a hold down bar; 306-expanding the 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 packing chucking method of the present invention to production, a core packing chucking apparatus as described below is designed according to the core packing 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 core package vertical direction based on the core package, newly increases the horizontal tightening force to the core package to avoid the displacement of core package on the horizontal direction.
A core bag clamping and pressing device is provided with a transverse pressing hand 300, wherein the transverse pressing hand 300 comprises a surrounding frame 301 and a tightening piece, the tightening piece comprises a positioning sleeve 302, a positioning block 303, a pressing sleeve 304 and a pressing rod 305, the surrounding frame 301 is a rectangular frame at least provided with three layers of horizontal cross bars, namely the surrounding frame 301 is a frame at least provided with three layers of horizontal cross bars among four prisms of the rectangular frame; the positioning sleeve 302 is a hollow structure with a blocking piece at one end, the positioning sleeve 302 is clamped in a gap formed by two cross rods of the enclosure frame 301, and one end with the blocking piece is arranged on the inner side of the enclosure frame 301, in order to prevent the positioning sleeve 302 from falling off from the enclosure frame 301 in the use process, a positioning block 303 is arranged at one end of the positioning sleeve 302 extending out of the outer side of the enclosure frame 301, the positioning block 303 is fixedly connected to the positioning sleeve 302, and in this embodiment, the positioning block 303 is connected to the positioning sleeve 302 through a bolt; the compression sleeve 304 is connected in the positioning sleeve 302 in a penetrating manner, the compression rod 305 is connected in the compression sleeve 304 in a penetrating manner and can move relatively along the compression sleeve 304, and the compression rod 305 has a self-locking function, that is, after the compression rod 305 moves to a determined position relative to the compression sleeve 304 and stops, relative movement between the compression rod 305 and the compression sleeve 304 due to external factors is avoided, so that the sidewall of the core package is continuously clamped, that is, the compression rod 305 can continuously maintain the compression force on the sidewall of the core package, and the phenomenon that molten metal generates relative displacement among various groups of the core package due to the expansion force of the core package in the filling and condensing processes, so that fire running or standard deviation of the size of a casting is caused in the casting process is avoided. In this embodiment, the pressing rod 305 and the pressing sleeve 304 are connected by a thread, that is, the pressing rod 305 may be a screw rod with an external thread on its entire length, or a connecting rod with external threads on both ends; the corresponding pressing sleeve 304 is internally provided with an internal thread matched with the pressing rod 305.
As an optimization of this embodiment, a certain gap is left between the positioning block 303 and the cross bar of the surrounding frame 301, so that the positioning sleeve 302 can slide on the cross bar conveniently; that is, the positioning sleeve 302 can horizontally slide along the cross bar of the surrounding frame 301, so that the compressing rod 305 can be set at a position where the compressing rod 305 is needed or can compress, and thus the compressing rod 305 can compress the core package horizontally more appropriately, that is, can compress the core package at a proper position, so as to achieve the best compressing effect.
As another optimization of this embodiment, the pressing sleeve 304 may move relatively along the positioning sleeve 302, that is, the pressing sleeve 304 may push toward the core package side wall or pull away from the core package side wall along the positioning sleeve 302, so that the pressing rod 305 can obtain a large distance movement, thereby improving the efficiency of pushing or retracting the pressing rod 305 toward or away from the core package. In order to achieve this function, in this embodiment, a through hole or a blind hole is provided in the compressing sleeve 304, a through hole is provided in the positioning sleeve 302, and when the compressing sleeve 304 travels to a certain position away from the sidewall of the core package, the compressing sleeve 304 is locked on the positioning sleeve 302 by a pin through the set through hole or blind hole. Specifically, when the pressing sleeve 304 is solid as a whole, blind holes are provided to be matched with the pins; when the two ends of the pressing sleeve 304 are solid and the middle is hollow, through holes are arranged to be matched with the pins.
As another optimization of this embodiment, in order to increase the pressing force of the pressing rod 305 and avoid damaging the sidewall of the core bag during pressing, an expansion plate 306 is provided at the end of the pressing rod 305 in contact with the sidewall of the core bag.
As another optimization of this embodiment, in order to enable the compressing rod 305 to advance and retreat more conveniently, a rocking handle is disposed at an end of one end of the compressing rod 305 disposed outside the enclosure frame 301, and the rocking handle can conveniently enable the compressing rod 305 to advance and retreat toward the sidewall of the sand mold, that is, the compressing rod can be moved toward or away from the sidewall of the core package by rocking or rotating the rocking handle, so as to compress the sidewall of the core package.
Example two:
in the embodiment, the vertical pressing hand is adopted to replace the existing modes of pressing iron, locking screws and the like, so that the core package is compressed in the vertical direction, and the horizontal tightening force of the core package is increased. The parts of the lateral pressing hand 300 already described in the first embodiment are not described again.
The core bag 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 bag 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 actuating member 200 to reciprocate in the vertical direction, so that the core package is pressed in the vertical direction; the transverse pressing hand 300 is a frame structure with a plurality of layers, a pressing sleeve and a pressing rod for pressing the core package are arranged on the frame structure, and the core package needing to be clamped and pressed is arranged in the frame structure to clamp the core package 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 member 402 is disposed at one end of the vertical guide rail 103 close to the top cross beam, that is, the driving member 402 is disposed at the top of the vertical guide rail 103, and specifically, disposed on a cross bar on the vertical guide rail 103, that is, disposed at the top of the vertical guide rail 103 (that is, close to one end of the top cross beam), the driving member 402 is disposed on the cross bar, and the driving member 402 is used to drive the driving slider 401 to slide up and down along the vertical guide rail 103, so as to realize the up-and-down movement of the actuating member 200, so as to be suitable for core packages of 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 piece 403 is connected with the actuating piece 200, so that the vertical pressing hand 200 can avoid a casting process location of the upper end surface of the core bag. 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 package 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 disposed on the driving slider 401, and the second driving member is used for adjusting the distance between the two driving members 403, so as to be suitable for core packages with different sizes, and also can relatively adjust the position of each driving member 403 according to the arrangement of casting process areas such as a gate, a dead head and the like on the upper end surface of the core package, that is, change the distance between the two driving members 403, and finally change the pressing position of the actuating member 200 relative to the upper end surface of the core package.
The actuating member 200 is connected to the end of the transmission member 403 to act on the upper end surface of the core package. The actuating member 200 is a rectangular parallelepiped strip-shaped structure horizontally arranged at the end of the driving member 403, so that the actuating member can contact with the upper end surface of the core bag in the largest area, and the best pressure-bearing effect is obtained. In the present embodiment, there are two transmission members 403, and there are two actuating members 200, and in the case where casting process gates, risers, etc. are disposed in the middle of the upper end surface of the core package, the two actuating members 200 may be pressed on the upper end surface of the core package around the casting process regions such as the gates, the risers, etc. so as to achieve symmetrical and balanced pressure on the core package. More specifically, the actuating member 200 may be made of H-shaped steel.
The lateral pressing hand 300 is the frame-type lateral pressing hand 300 described in the first embodiment, that is, the lateral pressing hand 300 in the first embodiment is disposed on the mandrel bag clamping and pressing device in the second embodiment.
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 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 pressing hand 300 which is configured according to different use objects, the purpose that a plurality of core packages can be clamped and pressed on a station of one frame 100 is achieved, and meanwhile, the core packages of various different types can be clamped and pressed on the same station is also achieved, so that the production of various 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 (7)
1. The core bag clamping and pressing device is characterized by comprising a vertical pressing hand and a transverse pressing hand, wherein the vertical pressing hand comprises a frame, a driving part and an executing part; the frame is arranged on the ground, the driving part is arranged on the frame, and the executive component is connected with the driving part; the frame comprises upright posts, cross beams and vertical guide rails; four upright posts are arranged and are respectively arranged on the ground; the cross beam is bridged between the upright posts and is provided with a top cross beam and a middle cross beam; the vertical guide rail is arranged between the top cross beam and the middle cross beam;
the transverse pressing hand comprises a surrounding frame and a tightening piece, and the tightening piece is arranged on the frame; the clamping piece comprises a positioning sleeve, a positioning block, a pressing sleeve and a pressing rod;
the enclosure frame is a rectangular frame at least provided with three layers of horizontal cross rods; the enclosure frame is a frame provided with at least three layers of horizontal cross bars among four prisms of the rectangular frame;
the positioning sleeve is of a hollow structure with a blocking piece at one end, is clamped in a gap formed by two cross rods of the enclosure frame, and is arranged at the inner side of the frame at one end with the blocking piece; a positioning block is arranged at one end of the positioning sleeve extending out of the outer side of the surrounding frame, and a certain gap is formed between the positioning block and the cross rod, so that the positioning sleeve can slide along the cross rod;
the compression sleeve is penetrated in the positioning sleeve, so that the compression sleeve can slide along the positioning sleeve in a reciprocating manner;
the pressing rod is connected in the pressing sleeve in a penetrating mode, and the pressing rod is in threaded connection with the pressing sleeve.
2. The apparatus of claim 1, wherein the compression sleeve is adapted to be pushed toward the core package sidewall or pulled away from the core package sidewall along the positioning sleeve.
3. The mandrel pack clamping and pressing device according to claim 1, wherein the pressing rod is provided with a flaring plate at the end of the inner side of the surrounding frame, which is in contact with the sidewall of the mandrel pack.
4. The apparatus for clamping and pressing the core packet according to claim 1, wherein a rocking handle is arranged on the end of the pressing rod at one end of the outer side of the surrounding frame.
5. The apparatus for swage-fitting a core package of claim 1 wherein said drive section comprises 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 apparatus for clamping and pressing core packages according to claim 5, wherein said transmission members are symmetrically provided in two, and a second driving member is provided between said two transmission members, said second driving member being used for adjusting the relative distance between said two transmission members.
7. A mandrel pack crimping apparatus according to any of claims 5 to 6, wherein said actuating means is provided with a plurality of sets.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010992217.0A CN112170783B (en) | 2020-09-23 | 2020-09-23 | Core cladding clamping and pressing method and clamping and pressing device thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010992217.0A CN112170783B (en) | 2020-09-23 | 2020-09-23 | Core cladding clamping and pressing method and clamping and pressing device thereof |
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| CN112170783B true CN112170783B (en) | 2022-06-14 |
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| CN116020981B (en) * | 2023-02-15 | 2023-06-09 | 太原市三高能源发展有限公司 | Casting equipment is used in auto-parts production |
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