CN205032651U - Bent angle shape sand box foundary weight mechanism with self -locking function - Google Patents
Bent angle shape sand box foundary weight mechanism with self -locking function Download PDFInfo
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- CN205032651U CN205032651U CN201520821620.1U CN201520821620U CN205032651U CN 205032651 U CN205032651 U CN 205032651U CN 201520821620 U CN201520821620 U CN 201520821620U CN 205032651 U CN205032651 U CN 205032651U
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- guide pillar
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Abstract
The utility model relates to a fixing device is used in casting processing, a bent angle shape sand box foundary weight mechanism with self -locking function, including the sand box and be located the inside arenaceous shell of sand box, the top of arenaceous shell is equipped with tubaeform pouring basin, and the both sides of arenaceous shell are equipped with vertical cylindrical guide pillar, and the below of pouring basin is equipped with the clamp plate, and the foundary weight of gap junction L bent angle shape respectively on the guide pillar, the side of foundary weight be horizontal and vertical the setting respectively, horizontal edge be equipped with suit through -hole on the guide pillar respectively, terminal top with the clamp plate contacts to be connected, vertical limit quality is greater than the quality on horizontal limit and sets up downwards, and the focus of foundary weight is located the outside of guide pillar axis, and the focus is less than horizontal limit and clamp plate contact point half to guide pillar axis distance with guide pillar axis distance. The utility model discloses utilizing the principle of auto -lock and enough realizing through simple structure that the effort that the inflation of metal liquid produced when pouring can make locking more firm to the fixed purpose of the arenaceous shell in the sand box, the structure is extremely simple, with low costs and implement easily.
Description
Technical field
The present invention relates to casting processing fixture, be specifically related to a kind of bent angle shape sandbox foundary weight mechanism with auto-lock function.
Background technology
When casting manipulations, the use of arenaceous shell and sandbox is quite widely, and after arenaceous shell assembles, need mould to be arranged in sandbox load precoated sand, and compress by fixture, arenaceous shell is frangible, and being therefore easy to break when fixing causes molten metal to be revealed.The problem that current casting industry precoated sand and arenaceous shell compressing method are encountered has: 1, because the molten iron buoyancy in casting is very large, foundary weight is light can produce floating, rise case, ballast easily damages arenaceous shell by pressure or defeated and dispersed in advance in cast; 2, by the method for beating glue bond, time-consuming, cost is high, easy to crack, unreliable; 3, use screw clamp plate method, the bad control of degree of tightness, take a lot of work, easily sticky iron, bad cleaning; 4, method is clamped with wedge: can loosen when burying case back-up sand vibrations, easily losing efficacy, fixture processing difficulties, investment is large.In addition, also other all kinds of clamping useful, compression method all do not obtain more satisfactory, effect comparatively efficiently.
Summary of the invention
The present invention is the problem solving high, the complex operation of current all compressing method costs, easily arenaceous shell is caused to damages, poor reliability, provides a kind of easy and simple to handle, reliably fixing and can realize the bent angle shape sandbox foundary weight mechanism of self-locking.
The present invention realizes by the following technical solutions, a kind of bent angle shape sandbox foundary weight mechanism with auto-lock function, comprise sandbox and be positioned at the arenaceous shell of sandbox inside, the top of arenaceous shell is provided with flaring cup, the both sides of described arenaceous shell are provided with vertical cylindrical guides, and the below of cup is provided with pressing plate; The foundary weight of difference recessed bond ing L bent angle shape on described guide pillar, the side horizontal and vertical setting respectively of foundary weight, being respectively equipped with on widthwise edge is sleeved on through hole on guide pillar, and end is connected with the overlying contact of pressing plate; Longitudinal edge quality is greater than the quality of widthwise edge and arranges downwards.
Further, the center of gravity of described foundary weight is positioned at the outside of guide pillar axis, and center of gravity and guide pillar axial line distance are less than widthwise edge and the pressing plate contact point half to guide pillar axial line distance.
Further, described pressing plate is rectangular configuration, and the width of described widthwise edge is greater than the width of pressing plate.
Usefulness of the present invention is to utilize the principle of self-locking and enough objects being realized fixing the arenaceous shell in sandbox by simple structure, avoid the artificial afterburning fixing damage for arenaceous shell of traditional fixed form, the active force that when building, the expansion of molten metal produces can make locking more firm, structure is extremely simple, cost is low and enforcement is easy, it is time saving and energy saving to operate, and consolidation effect is good, is adapted at all kinds of Foundry Works and promotes the use of.
Accompanying drawing explanation
The main TV structure schematic diagram of Fig. 1 the present invention;
Fig. 2 plan structure schematic diagram of the present invention;
Fig. 3 self-lock mechanism of the present invention illustrates schematic diagram;
Stressed schematic diagram when Fig. 4 the present invention uses.
In figure, 1. sandbox base, 2. arenaceous shell, 3. guide pillar, 4. foundary weight, 5. cup, 6. pressing plate.
Detailed description of the invention
Below in conjunction with accompanying drawing, the present invention is further elaborated.
As depicted in figs. 1 and 2, a kind of bent angle shape sandbox foundary weight mechanism with auto-lock function provided by the invention, arenaceous shell 2 is positioned at sandbox inside, and the both sides of arenaceous shell 2 are provided with the cylindrical guides 3 be fixed on sandbox base 1, and the height of guide pillar 3 is higher than the upper end of arenaceous shell 2.The sprue gate of arenaceous shell 2 is positioned at top, and be provided with the hone gate cup 5 of upward opening above sprue gate, the below of cup 5 is provided with the pressing plate 6 of rectangle.Guide pillar 3 is respectively installed with the foundary weight 4 of L bent angle shape, the dual-side of foundary weight 4 level and arranging respectively downwards, not etc., the longitudinal edge quality be positioned at outside guide pillar 3 is not greater than the quality of widthwise edge for the dual-side weight of foundary weight 4.Foundary weight 4 be provided with the through hole with guide pillar 3 matched in clearance, widthwise edge contacts with pressing plate 6 and arranges.
During the invention process, between two guide pillars 3 putting into sandbox base 1 after being assembled by arenaceous shell 2, adjust the distance between arenaceous shell 2 and guide pillar 3, again pressing plate 6 and cup 5 are successively set on the top of arenaceous shell 2, finally foundary weight 4 is placed on guide pillar 3, make the overlying contact of its widthwise edge and pressing plate 6, longitudinal edge is arranged downwards.
As shown in Figure 3 and Figure 4, the schematic diagram of self-locking of the present invention, when foundary weight slides on guide pillar, always has certain gap.Want run-off the straight under being enclosed within the effect of stirring power P, A, B 2 of cover be coupling tactile.Set up coordinate system and go out mechanics equilibrium equation side by side:
∑x=0NB-NA=0
∑y=0P-FA+FB=0
∑Mo=0P*a+NB*b-FB*d/2-FA*d/2=0
Obtained by static friction law:
FA=NA*f
FB=NB*f
Wherein f is the coefficient of friction of object;
More than simultaneous five formulas are solved an equation: a=b/2f (this formula is the critical point of friction self-locking).
The a<b/2f if guarantee foundary weight is not stuck,
If ensure the motionless a>b/2f of foundary weight;
Thus can by platen design embayment dihedral, the gravity of widthwise edge is Q1, and the gravity of longitudinal edge is Q2, makes a concerted effort at Q place.Make Q near the center line (axis) of hole axle during design, a value is much smaller than b/2f critical point.
During enforcement, there will be three kinds of situations:
Situation one: when not having resistance, pressing plate, under the effect of the Q that makes a concerted effort, can glide always;
Situation two: when being subject to resistance N on the right of pressing plate, stop gliding on the right side of pressing plate, can continue to glide in left side under the effect of gravity Q2, a value of Q2 is less than critical point, and makes hole run-off the straight on axle, and gap is eliminated, till motionless to downslide;
Situation three: the N power (molten metal expansion buoyancy) on right side continues to strengthen in any case, and because a value of N power is much larger than critical point, a>b/2f, so pressure board stubbornly refuses to move, can not slide in the other direction.
While actually employed, sandbox can constantly shake in back-up sand process, and whole fixture is tended towards stability, and in the process of later stage cast, this poised state can keep.
Claims (3)
1. one kind has the bent angle shape sandbox foundary weight mechanism of auto-lock function, comprise sandbox and be positioned at the arenaceous shell (2) of sandbox inside, the top of arenaceous shell (2) is provided with flaring cup (5), it is characterized in that, the both sides of described arenaceous shell (2) are provided with vertical cylindrical guides (3), and the below of cup (5) is provided with pressing plate (6);
The foundary weight (4) of described guide pillar (3) upper recessed bond ing L respectively bent angle shape, the side horizontal and vertical setting respectively of foundary weight (4), being respectively equipped with on widthwise edge is sleeved on the upper through hole of guide pillar (3), and end is connected with the overlying contact of pressing plate (6); Longitudinal edge quality is greater than the quality of widthwise edge and arranges downwards.
2. the bent angle shape sandbox foundary weight mechanism with auto-lock function according to claim 1, it is characterized in that, the center of gravity of described foundary weight (4) is positioned at the outside of guide pillar (3) axis, and center of gravity and guide pillar (3) axial line distance are less than widthwise edge and pressing plate (6) the contact point half to guide pillar (3) axial line distance.
3. the bent angle shape sandbox foundary weight mechanism with auto-lock function according to claim 2, it is characterized in that, described pressing plate (6) is rectangular configuration, and the width of described widthwise edge is greater than the width of pressing plate (6).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520821620.1U CN205032651U (en) | 2015-10-23 | 2015-10-23 | Bent angle shape sand box foundary weight mechanism with self -locking function |
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| CN201520821620.1U CN205032651U (en) | 2015-10-23 | 2015-10-23 | Bent angle shape sand box foundary weight mechanism with self -locking function |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105215293A (en) * | 2015-10-23 | 2016-01-06 | 临沂大学 | A kind of bent angle shape sandbox foundary weight mechanism with auto-lock function |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105215293A (en) * | 2015-10-23 | 2016-01-06 | 临沂大学 | A kind of bent angle shape sandbox foundary weight mechanism with auto-lock function |
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