Device for eliminating shrinkage porosity and sand pores in casting

Abstract

The utility model relates to the technical field of casting machining, and discloses a casting internal shrinkage porosity and sand pore eliminating device which comprises a machining table, notches are symmetrically formed in the machining table, placing seats are symmetrically fixed to the machining table, casting molds are placed on the placing seats, a clamping assembly is arranged on the machining table, and the clamping assembly is connected with the machining table. Two limiting seats are symmetrically fixed to the machining table, movable columns are connected to the two limiting seats in a sliding mode respectively, a reciprocating assembly is arranged on the machining table, knocking rods are movably installed in the movable columns, and adjusting assemblies are arranged on the movable columns. The device can flexibly adapt to casting molds with different sizes, effectively solves the problem of narrow application range caused by fixed and non-adjustable position of the knocking rod in the prior art, can ensure that the relative position of the knocking rod and the casting mold is always reasonable, avoids the situation of motion interference of the knocking rod caused by overlarge size of the casting mold, and improves the production efficiency. And the problem that knocking is not in place due to the fact that the size of a casting mold is small is solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to casting processing technical field, concretely is a kind of casting internal shrinkage and sand hole eliminating device. BACKGROUND

[0002] When casting, in the late solidification of casting, the change of temperature gradient, many small grains will appear in casting melt, after the growth of grain interconnect, remaining metal liquid is divided into small pool that is not interconnected, these small pools cannot be compensated when further cooling and solidification, and many small holes will be produced, that is, when shrinkage phenomenon appears in the processing of valve body casting, the life and performance of valve body casting will be reduced.

[0003] Such as the application number for CN202422190922.5 a kind of casting internal shrinkage and sand hole eliminating device, it is related to casting processing technical field, including bottom plate and vertical rod, the upper surface both sides of bottom plate are rotationally arranged with limit shell, two molds are inserted in the inside of limit shell, two the upper side of mold is provided with casting mouth, two vertical rods are fixedly arranged on the upper surface both sides of bottom plate, two the both sides of vertical rod are fixedly arranged with horizontal plate, the movable ring is arranged between two horizontal plates, the both ends of movable ring are fixedly arranged with sliding block, the surface of two horizontal plates is provided with strip-shaped mouth, two sliding blocks are slidably connected with corresponding strip-shaped mouth, the both sides of movable ring are fixedly arranged with knock rod, the upper surface of bottom plate is rotationally arranged with rotating rod, the upper end of rotating rod is fixedly sleeved with rotary disc. The utility model can carry out shrinkage and sand hole eliminating work to multiple castings simultaneously, and can greatly improve work efficiency.

[0004] However, in actual processing scene, the size of casting has obvious difference, and the specifications are different. The knock rod in the device has single specification, and the position is fixed and cannot be adjusted. When facing larger casting, the knock rod is easy to collide with the peripheral structure of casting mold during reciprocating knocking, so that the knocking is blocked, and the normal operation of the device is affected. For smaller casting, the distance between knock rod and casting mold is too large, so that knocking cannot reach the position, effective vibration cannot be generated in the key area of casting mold, and then the elimination effect of casting internal shrinkage and sand hole is reduced.

[0005] Therefore, we propose a kind of casting internal shrinkage and sand hole eliminating device to solve the problems in the above. UTILITY MODEL CONTENTS

[0006] The utility model aims at providing a kind of casting internal shrinkage and sand hole eliminating device to solve the problems that the position of existing knock rod is fixed, and casting internal shrinkage and sand hole cannot be effectively eliminated for casting mold of different specifications.

[0007] The utility model provides following technical scheme: a kind of casting internal shrinkage and sand hole eliminating device, including processing table, the notches are symmetrically provided on the processing table, symmetrically fixed with placing seat on the processing table, casting mold is placed on the placing seat, clamping assembly is equipped on the processing table, two limit seats are symmetrically fixed on the processing table, two the limit seat is respectively slidably connected with movable column, reciprocating assembly is equipped on the processing table, knock rod is movably installed in the movable column, adjusting assembly is equipped on the movable column.

[0008] Preferably, the clamping assembly includes a U-shaped bracket fixed on the processing table, a lead screw is rotatably arranged on the U-shaped bracket, a hand wheel is fixed on the end side of the lead screw, a sliding rod is threadedly installed on the lead screw, and a clamping ring is fixed on the end side of the sliding rod.

[0009] Preferably, a telescopic rod is fixed between the clamping ring and the U-shaped bracket, and the telescopic rod is symmetrically provided with two about the axis of the sliding rod.

[0010] Preferably, the reciprocating assembly includes a mounting bracket fixed on the bottom surface of the processing table, a motor is fixed on the mounting bracket, a coupling is fixed on the output end of the motor, a turntable is fixed on the coupling, a convex rod is fixed on the turntable, an arc-shaped plate is fixed on the end side of the movable column, an arc-shaped groove is formed in the arc-shaped plate, and the arc-shaped plate and the convex rod are slidably connected through the arc-shaped groove.

[0011] Preferably, a circular groove is formed in the processing table, and the turntable is rotatably connected with the circular groove.

[0012] Preferably, the adjusting assembly includes a cavity formed in the movable column, a screw hole one is formed in the movable column, a plurality of screw holes two are linearly arranged and distributed on the knock rod, a screw is threadedly installed in each of the screw hole one and the screw hole two, a hexagonal groove is formed in the top surface of the screw, and a hexagonal wrench is connected with the hexagonal groove.

[0013] The utility model has the following beneficial effects:

[0014] 1. The device can flexibly adapt to casting molds of different sizes, effectively solving the problem of narrow application range caused by the fixed position of the knock rod in the prior art. Whether it is a small or medium-sized casting mold, the relative position of the knock rod and the casting mold can always be reasonable by simple adjustment, which avoids the movement interference of the knock rod caused by the oversized casting mold and prevents the knock from being out of place caused by the undersized casting mold, improves the universality of the device in the multi-specification casting processing scene, reduces the tedious operation of adjusting the overall structure of the equipment when replacing the casting mold, and reduces the operation difficulty and time cost.

[0015] 2、The device can realize stable clamping of the casting mold during the knocking operation of the casting mold, effectively preventing the casting mold from shaking during the knocking process. This makes the knocking rod always accurately act on the set knocking position of the casting mold, avoiding knocking deviation caused by the shaking of the casting mold, further ensuring the elimination effect of the internal shrinkage and sand pores of the casting; at the same time, it also reduces the accidental impact on the device components caused by the shaking of the casting mold, reduces the risk of component damage, prolongs the overall service life of the device, and reduces equipment maintenance costs.

[0016] 3、The clamping assembly of the device has good adaptability, that is, even if different specifications of casting molds are clamped, stable and appropriate clamping force can still be maintained, and the clamping will not be too loose or too tight due to the size change of the casting mold. When clamping is too loose, the casting mold can be effectively prevented from shifting during the knocking process; when facing casting molds with large size differences, the casting mold can also be prevented from being deformed due to excessive clamping, which not only ensures the stability of different specifications of castings during processing, but also ensures the shape accuracy of the processed castings, reduces casting quality defects caused by clamping problems, and improves the qualified casting output rate.

[0017] 4、The device can realize continuous and uniform knocking action on the casting mold, and through stable reciprocating knocking, the internal loose structure of the casting can be fully compacted, and the gas in the sand pores can be effectively discharged, which significantly improves the elimination rate of internal shrinkage and sand pores of the casting. This not only reduces the probability of affecting the quality of the casting due to defects, but also ensures the structural strength and use performance of the processed casting, reduces the generation of unqualified castings, reduces the waste of raw materials and rework costs, and improves the overall production efficiency. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 The overall structure of the utility model Figure 1 .

[0019] Figure 2 The overall structure of the utility model Figure 2 .

[0020] Figure 3 The structure of the reciprocating assembly of the utility model Figure 1 .

[0021] Figure 4 The structure of the reciprocating assembly of the utility model Figure 2 .

[0022] Figure 5 The structure of the adjusting assembly of the utility model.

[0023] Figure 6 The structure of the clamping assembly of the utility model.

[0024] Fig. 1, processing table; 2, recess; 3, placing seat; 4, casting mold; 5, clamping assembly; 51, U-shaped frame; 52, screw rod; 53, rocker; 54, sliding rod; 55, clamping ring; 56, telescopic rod; 6, limiting seat; 7, movable column; 8, reciprocating assembly; 81, mounting frame; 82, motor; 83, shaft coupling; 84, rotating disc; 85, protruding rod; 86, arc plate; 87, arc-shaped groove; 9, knocking rod; 10, adjusting assembly; 101, cavity; 102, screw hole one; 103, screw hole two; 104, screw; 105, hexagonal groove; 106, hexagonal wrench; 11, circular groove. DETAILED DESCRIPTION

[0025] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the utility model.

[0026] Embodiment one: this embodiment aims to promote the solution to the problem that the position of the knocking rod 9 is fixed and cannot be adjusted, different sizes of casting molds 4 cannot be matched, the application range is narrow, motion interference is easy to occur, and the elimination effect is affected. Please refer to Figure 1 Figure 5 A device for eliminating internal shrinkage and sand holes of a casting, comprising a processing table 1, recesses 2 are symmetrically formed on the processing table 1, placing seats 3 are symmetrically fixed on the processing table 1, a casting mold 4 is placed on the placing seats 3, two limiting seats 6 are symmetrically fixed on the processing table 1, movable columns 7 are respectively and slidably connected to the two limiting seats 6, a reciprocating assembly 8 is arranged on the processing table 1, a knocking rod 9 is movably arranged in the movable column 7, and an adjusting assembly 10 is arranged on the movable column 7.

[0027] The reciprocating assembly 8 comprises a mounting frame 81 fixed to the bottom surface of the processing table 1, a motor 82 is fixed to the mounting frame 81, a shaft coupling 83 is fixed to the output end of the motor 82, a rotating disc 84 is fixed to the shaft coupling 83, a protruding rod 85 is fixed to the rotating disc 84, an arc plate 86 is fixed to the end side of the movable column 7, an arc-shaped groove 87 is formed in the arc plate 86, and the arc plate 86 and the protruding rod 85 are slidably connected through the arc-shaped groove 87. A circular groove 11 is formed in the processing table 1, and the rotating disc 84 is rotatably connected to the circular groove 11.

[0028] ​The adjusting assembly 10 comprises a cavity 101 formed in the movable column 7, the movable column 7 is provided with a threaded hole 102, the knocking rod 9 is provided with a plurality of threaded holes 103 arranged in a linear array, the threaded hole 102 and the threaded hole 103 are both provided with a screw 104, the top surface of the screw 104 is provided with a hexagonal groove 105, and the hexagonal groove 105 is connected with a hexagonal wrench 106.

[0029] In this embodiment: first, the casting mold 4 which needs to eliminate internal shrinkage and sand holes is placed on the placing seat 3 of the machining table 1, and the casting mold 4 is ensured to be placed stably. Then, the clamping assembly 5 in embodiment two is started to stably clamp the casting mold 4, so that the casting mold 4 always maintains a stable state in the subsequent elimination work, and the influence of position deviation on the defect elimination effect is avoided.

[0030] Next, the reciprocating assembly 8 of the device is started, and the knocking rod 9 drives the reciprocating knocking of the casting mold 4. Specifically, the motor 82 fixed on the mounting frame 81 at the bottom of the machining table 1 is started first, the output end of the motor 82 drives the rotation of the rotating disc 84 through the shaft coupling 83, and since the rotating disc 84 is rotationally connected with the circular groove 11 on the machining table 1, the rotating disc 84 can stably rotate in the circular groove 11 and will not deviate or jam.

[0031] With the rotation of the rotating disc 84, the protruding rod 85 on the surface of the rotating disc 84 rotates synchronously, and the protruding rod 85 is connected with the arc-shaped groove 87 of the arc-shaped plate 86 on the end side of the movable column 7. Under the continuous rotation of the protruding rod 85, the arc-shaped plate 86 is driven to reciprocate, and then the movable column 7 fixedly connected with the arc-shaped plate 86 reciprocates on the limiting seat 6 along the set track. During the sliding process of the movable column 7, the knocking rod 9 connected with the movable column 7 is driven to reciprocate synchronously, so that the continuous and uniform knocking of the casting mold 4 is realized. Through the vibration generated by the knocking, the loose structure in the casting is compacted, and the gas in the internal sand holes is discharged, and finally the elimination of the internal defects of the casting is completed.

[0032] However, in the actual machining scene, the specifications of the castings are obviously different, and the sizes of the corresponding casting molds 4 are also different. In the prior art, the distance between the knocking rod 9 and the casting mold 4 is fixed and cannot be adjusted. When facing casting molds 4 of different sizes, problems are likely to occur. First, when the size of the casting mold 4 is large, if the initial distance of the knocking rod 9 is too close, movement interference will occur between the knocking rod 9 and the peripheral structure of the casting mold 4 during the reciprocating movement, which not only affects the normal operation of the device, but also may cause part wear. Second, when the size of the casting mold 4 is small, if the initial distance of the knocking rod 9 is too far, the knocking will not reach the key area of the casting mold 4, which cannot produce effective vibration, so that the internal shrinkage and sand holes of the casting cannot be completely eliminated, affecting the quality of the casting.

[0033] To solve this problem, the position of the knocking rod 9 is flexibly adjusted by adjusting the assembly 10 to adapt to different sizes of the casting mold 4. In specific operation, the worker first finds the screw hole one 102 on the movable column 7 and the screw hole two 103 on the knocking rod 9, inserts the hexagonal wrench 106 into the hexagonal groove 105 on the top surface of the screw 104, rotates the hexagonal wrench 106 clockwise, and gradually unscrews the screw 104 from the screw hole one 102 and the screw hole two 103. At this time, the knocking rod 9 is released from the fixed state in the cavity 101 of the movable column 7 and can move freely. The worker adjusts the knocking rod 9 to the appropriate position according to the actual size of the casting mold 4 to ensure that it can accurately act on the key parts of the casting mold 4 and will not interfere with the surrounding structure during subsequent knocking.

[0034] After the position is determined, the hexagonal wrench 106 is inserted into the hexagonal groove 105 again and rotated counterclockwise to make the screw 104 rethread into the corresponding screw hole one 102 and screw hole two 103, firmly fixing the knocking rod 9 on the movable column 7 and completing the position adjustment. Finally, the hexagonal wrench 106 is removed, and at this time the screw 104 is completely embedded in the screw hole one 102 and will not protrude outward. In this way, when the movable column 7 moves back and forth, the screw 104 will not come into contact with the limiting seat 6, avoiding the contact from affecting the stability of the reciprocating knocking action and further ensuring the smooth progress of the defect elimination work.

[0035] Embodiment two: This embodiment is intended to promote the solution to the problem that the casting mold 4 is prone to shaking during knocking, resulting in knocking position deviation and incomplete defect elimination, and cannot adapt to the fixing needs of different specifications of the casting mold 4. This embodiment is an improvement based on embodiment one. For details, please refer to Figure 1 - Figure 2 and Figure 6 , the machining table 1 is provided with a clamping assembly 5, and the clamping assembly 5 includes a U-shaped frame 51 fixed on the machining table 1. The U-shaped frame 51 is provided with a screw rod 52 rotating thereon, and the end side of the screw rod 52 is fixed with a hand wheel 53. The screw rod 52 is provided with a sliding rod 54 screwed thereon, and the end side of the sliding rod 54 is fixed with a clamping ring 55.

[0036] The clamping ring 55 and the U-shaped frame 51 are fixed with a telescopic rod 56, and the telescopic rod 56 is symmetrically provided with two about the axis of the sliding rod 54.

[0037] In the embodiment, first, the casting mold 4 is placed on the placing seat 3 of the machining table 1, and then the casting mold 4 is fixed by the clamping assembly 5. The worker rotates the hand wheel 53 at the end side of the lead screw 52 on the U-shaped frame 51, and the hand wheel 53 drives the lead screw 52 to rotate on the U-shaped frame 51. Since the slide rod 54 is threadedly connected with the lead screw 52, when the lead screw 52 rotates, the slide rod 54 is driven to move along the axis direction of the lead screw 52. During the movement of the slide rod 54, the end-side clamping ring 55 is synchronously moved. According to the width size of the casting mold 4, the distance between the two clamping rings 55 is adjusted, so that the clamping rings 55 gradually approach the two sides of the casting mold 4.

[0038] During the movement of the clamping ring 55, the two telescopic rods 56 fixed between the clamping ring 55 and the U-shaped frame 51 are telescoped, and the telescopic rods 56 are symmetrically arranged about the axis of the slide rod 54, which can guide the movement of the slide rod 54 and avoid the deviation of the slide rod 54 during the movement, so as to ensure that the clamping ring 55 always approaches the casting mold 4 in a straight line direction. When the clamping ring 55 tightly abuts against the outer wall of the casting mold 4, the rotation of the hand wheel 53 is stopped. At this time, the two clamping rings 55 clamp and fix the casting mold 4 from the two sides, so as to prevent the casting mold 4 from shaking during the subsequent knocking process.

[0039] For casting molds 4 of different specifications, the positions of the clamping rings 55 can be adjusted by rotating the hand wheel 53, so that stable clamping can be realized, and the adaptation range of the device to casting molds 4 of different specifications is greatly improved. During the subsequent knocking work, since the casting mold 4 is firmly fixed, the knocking rod 9 can accurately act on the set position of the casting mold 4, so as to avoid the knocking deviation caused by the shaking of the casting mold 4, further ensure the elimination effect of the internal shrinkage and sand pores of the casting, and improve the stability and safety of the device.

[0040] It should be noted that, in the present document, the terms such as first and second, etc., are merely used to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "contain" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not explicitly listed or inherent to such process, method, article or device.

[0041] The above description is only the preferred embodiment of the present application, and it should be pointed out that, for ordinary skilled in the art, without departing from the technical principles of the present application, a number of improvements and refinements can be made, and these improvements and refinements should be regarded as the protection scope of the present application.

Claims

1. A device for eliminating shrinkage porosity and sand pores inside castings, comprising a processing table (1), characterized in that: The processing table (1) is provided with a notch (2) symmetrically, the processing table (1) is fixed with a placing seat (3) symmetrically, the placing seat (3) is placed with a casting mold (4), the processing table (1) is provided with a clamping assembly (5), the processing table (1) is fixed with two limit seats (6) symmetrically, two limit seats (6) are respectively connected with a movable column (7) slidingly, the processing table (1) is provided with a reciprocating assembly (8), the movable column (7) is movably provided with a knocking rod (9), the movable column (7) is provided with an adjusting assembly (10).

2. A device for eliminating internal shrinkage and sand blow in a casting according to claim 1, characterized in that: The clamping assembly (5) comprises a U-shaped frame (51) fixed on the processing table (1), the U-shaped frame (51) is provided with a lead screw (52), the lead screw (52) is fixed with a rocking wheel (53), the lead screw (52) is provided with a sliding rod (54) threaded, and the sliding rod (54) is fixed with a clamping ring (55).

3. A device for eliminating internal porosity and gas holes in a casting according to claim 2, characterized in that: The clamping ring (55) and the U-shaped frame (51) are fixed with a telescopic rod (56), and the telescopic rod (56) is provided with two about the sliding rod (54) axis symmetry.

4. A device for eliminating internal porosity and gas holes in a casting according to claim 1, characterized in that: The reciprocating assembly (8) comprises a mounting frame (81) fixed on the bottom surface of the processing table (1), the mounting frame (81) is fixed with a motor (82), the output end of the motor (82) is fixed with a shaft coupling (83), the shaft coupling (83) is fixed with a rotating disc (84), the rotating disc (84) is fixed with a convex rod (85), the movable column (7) end side is fixed with an arc plate (86), the arc plate (86) is provided with an arc slot (87), and the arc plate (86) and the convex rod (85) are connected through the arc slot (87).

5. A device for eliminating internal porosity and gas holes in a casting according to claim 4, characterized in that: The processing table (1) is provided with a circular groove (11), and the rotating disc (84) is connected with the circular groove (11) rotationally.

6. A device for eliminating internal porosity and gas holes in a casting according to claim 1, characterized in that: The adjusting assembly (10) comprises a cavity (101) formed in the movable column (7), a screw hole (102) is formed in the movable column (7), a plurality of screw holes (103) are formed in the knocking rod (9) and arranged in linear array, the screw hole (102) and the screw hole (103) are both screwed with a screw (104), the top surface of the screw (104) is provided with a hexagonal groove (105), and the hexagonal groove (105) is connected with a hexagonal wrench (106).

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