Shell casting correcting tool and method

Abstract

The invention relates to the technical field of casting, in particular to a correcting tool and method for a shell casting. The correcting tool comprises a bottom plate, a movable beam, a fixed beam, a column block and four stand columns. The movable beam and the fixed beam are arranged in a cross shape and are inserted into the cross mounting hole of the column block, and the movable beam is located below the fixed beam; the two ends of the movable beam are transversely inserted into the upper parts of the two upright posts respectively; the moving beam is in sliding fit with the stand columns and the column blocks. The two ends of the fixed beam are transversely inserted into the upper portions of the other two stand columns respectively. The stand column is detachably connected with the bottom plate. A cushion block is inserted between the top surface of the fixed beam and the upper hole wall of the cross-shaped mounting hole of the column block; the cushion block is formed by stacking a plurality of gaskets with different thicknesses; two protruding blocks with different thicknesses are arranged on the lower surface of the movable beam at intervals. The thickness of each protruding block is equal to the thickness of one gasket or equal to the sum of the thicknesses of two gaskets. And the correction amount can be accurately controlled in a mode of extracting the gasket.

Description

Technical Field

[0001] The invention relates to the technical field of casting, and in particular to a correction tool and method for a shell casting. Background Art

[0002] Combination Figure 1 , Figure 2 The figure shows the structure diagram of the shell casting. The shell casting has a large market demand and has entered mass production. However, due to the particularity of its structure, it is difficult to cast and has a low pass rate. Most of the castings produced are scrapped due to large deformation caused by subsequent processes. Since the casting structure has a suspended inner cavity, an arc-shaped partition 101 is arranged on the upper part of the shell inner cavity to divide the inner cavity into two upper and lower cavities, and reinforcing ribs are arranged on the arc-shaped partition, and a hollow column 102 is integrally formed in the middle of the arc-shaped partition.

[0003] Since the arc-shaped partition 101 is prone to shrinkage and deformation, which may easily cause the position of the hollow column 102 to rise, the general correction method is not easy to operate, is difficult, and cannot be quantified, resulting in the arc-shaped partition 101 being crushed during correction, causing most castings to be piled up in the correction process and seriously delaying production tasks. Summary of the invention

[0004] The main purpose of the present invention is to provide a correction tool and method for a shell casting, aiming to solve the above technical problems.

[0005] To achieve the above-mentioned purpose, on the one hand, the present invention proposes a correction tool for a shell casting, comprising a base plate, a movable beam, a fixed beam, a column block and four columns; the movable beam and the fixed beam are arranged in a cross shape and inserted in the cross mounting hole of the column block, and the movable beam is located under the fixed beam; the two ends of the movable beam are respectively inserted horizontally into the upper parts of two of the columns; the movable beam is slidably matched with the column and the column block respectively; the two ends of the fixed beam are respectively inserted horizontally into the upper parts of the other two columns; the lower end of the column is detachably connected to the base plate; a pad is inserted between the top surface of the fixed beam and the upper hole wall of the cross mounting hole of the column block, and the pad is formed by stacking multiple gaskets of different thicknesses; two protruding blocks of different thicknesses are arranged at intervals on the lower surface of the movable beam; the thickness of each protruding block is equal to the thickness of one of the gaskets, or equal to the sum of the thicknesses of two of the gaskets.

[0006] Preferably, the thickness specifications of the gasket include 0.5mm, 1.0mm, 1.5mm, and 2.0mm.

[0007] Preferably, the moving beam has three models; the thickness of the two raised blocks on the moving beam of the first model is 0.5mm and 1.0mm respectively; the thickness of the two raised blocks on the moving beam of the second model is 1.5mm and 2.0mm respectively; the thickness of the two raised blocks on the moving beam of the third model is 2.5mm and 3.0mm respectively.

[0008] Preferably, a slide groove is provided at a middle position of the lower surface of the fixed beam, and the movable beam is slidably matched with the slide groove.

[0009] Preferably, a vertical scale is provided on the column block; and the scale is located at a side position of the moving beam.

[0010] Preferably, a flange is provided at the lower end of the column, and the flange is screwed to the base plate.

[0011] On the other hand, the present invention also provides a method for correcting a shell casting, using the correction tool, comprising the following steps:

[0012] S1. Place the shell casting on the base plate;

[0013] S2, estimating the deformation of the hollow column axial position of the shell casting, and selecting a suitable type of moving beam according to the deformation;

[0014] S3, inserting the fixed beam and the movable beam selected in step S2 into the cross mounting hole of the column block respectively, and making the bottom of the groove between the two protruding blocks on the movable beam abut against the lower hole wall of the cross mounting hole of the column block; and inserting a pad block formed by stacking a plurality of gaskets between the top surface of the fixed beam and the upper hole wall of the cross mounting hole of the column block;

[0015] S4, respectively install four columns at the ends of the movable beam and the fixed beam, connect the lower ends of the columns to the bottom plate, and make the lower ends of the column blocks abut against the top surface of the hollow column of the shell casting;

[0016] S5, according to the deformation estimated in step S2, extract one or two gaskets of corresponding thickness, so that a gap appears between the top surface of the gasket formed by the remaining gaskets and the upper hole wall of the cross mounting hole of the column block;

[0017] S6, using a press machine to vertically press the column block downward to move the column block downward;

[0018] S7, pulling the moving beam along the axial direction of the moving beam, so that the protruding block on the lower surface of the moving beam abuts against the lower hole wall of the cross mounting hole of the column block;

[0019] S8. Perform stress relief annealing on the shell casting together with the tooling as a whole to eliminate thermal stress.

[0020] Preferably, the method further includes step S9, removing the tooling: when the stress relief annealing in step S8 is completed and the shell casting is cooled, lubricating oil is sprayed on the cross mounting holes of the column blocks and the connection parts between the columns and the movable beams and the fixed beams, and the end of the movable beam is first knocked to remove the movable beam, and then the end of the fixed beam is knocked to remove the fixed beam.

[0021] Preferably, in step S6, when the column block is pressed vertically downward by a press, a scale on the column block is used to observe the descending height of the column block relative to the moving beam.

[0022] Preferably, steps S5 to S8 are repeated to perform correction twice.

[0023] Due to the adoption of the above technical solution, the beneficial effects of the present invention are as follows:

[0024] (1) In the present invention, the hollow column of the shell casting is pressed down and corrected by utilizing the column block to receive the pressure of the press. The correction amount can be accurately controlled by adopting the method of extracting the gasket, thereby avoiding the arc partition on the shell casting being crushed due to excessive correction amount during correction.

[0025] (2) In the present invention, after the column block moves downward, the movable beam is pulled along the axial direction of the movable beam so that the raised block on the lower surface of the movable beam abuts against the lower hole wall of the cross mounting hole of the column block, thereby limiting the upward movement of the column block and ensuring that the lower end of the column block always abuts against the top surface of the hollow column of the shell casting.

[0026] (3) In the present invention, when the column block is pressed vertically by a press machine, the descending height of the column block relative to the moving beam can be observed by using the scale on the column block, thereby achieving the effect of visualizing the correction amount.

[0027] (4) In the present invention, the shell casting and the tooling are subjected to stress relief annealing treatment as a whole to prevent the shell bottom casting from rebounding and reduce thermal stress deformation, complete the precise correction of the casting, and meet the later assembly requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0029] Figure 1 Schematic diagram of the three-dimensional structure of the shell casting

[0030] Figure 2 is a cross-sectional view of the shell casting;

[0031] Figure 3 The schematic diagram is a schematic diagram of the shell casting after being clamped in the correction fixture;

[0032] Figure 4 It is a schematic diagram of the positional relationship among the movable beam, the fixed beam and the cushion block in the present invention;

[0033] Figure 5 It is a schematic diagram of the structure of gaskets of different thickness specifications in the present invention;

[0034] Figure 6 It is a structural schematic diagram of the fixed beam in the present invention;

[0035] Figure 7 Schematic diagrams of different types of moving beams in the present invention;

[0036] Figure 8 It is a schematic diagram of the structure of the scale on the column block in the present invention.

[0037] Explanation of the accompanying drawings: 1. Moving beam; 1a. Raised block; 2. Fixed beam; 2a. Slide groove; 3. Scale; 4. Pad; 4a. Gasket; 5. Bottom plate; 6. Column block; 7. Column; 7a. Flange; 101. Arc partition; 102. Hollow column. DETAILED DESCRIPTION

[0038] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0039] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back, etc.) are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0040] Combination Figures 3 to 8As shown, on the one hand, this embodiment provides a correction tool for a shell casting, which includes a base plate 5, a movable beam 1, a fixed beam 2, a column block 6 and four columns 7; the movable beam 1 and the fixed beam 2 are arranged in a cross shape and inserted in the cross mounting hole of the column block 6; and the movable beam 1 is located below the fixed beam 2; the two ends of the movable beam 1 are respectively inserted horizontally into the upper parts of two of the columns 7; the movable beam 1 is slidably matched with the column 7 and the column block 6 respectively; the two ends of the fixed beam 2 are respectively inserted horizontally into the upper parts of the other two columns 7; the lower end of the column 7 is detachably connected to the base plate 1; a cushion block 4 is inserted between the top surface of the fixed beam 2 and the upper hole wall of the cross mounting hole of the column block 6, and the cushion block 4 is formed by stacking multiple gaskets 4a of different thicknesses; two protruding blocks 1a of different thicknesses are arranged at intervals on the lower surface of the movable beam 1; the thickness of each protruding block 1a is equal to the thickness of one of the gaskets 4a, or equal to the sum of the thicknesses of two of the gaskets 4a.

[0041] Combination Figure 5 As shown, the thickness specifications of the gasket 4a include 0.5mm, 1.0mm, 1.5mm, and 2.0mm.

[0042] Combination Figure 7 As shown, the moving beam 1 has three models, and the specific models and specifications are as follows:

[0043] The thicknesses of the two protruding blocks 1a on the moving beam 1 of the first type are 0.5 mm and 1.0 mm respectively;

[0044] The thicknesses of the two raised blocks 1a on the second type of moving beam 1 are 1.5 mm and 2.0 mm respectively;

[0045] The thicknesses of the two protruding blocks 1a on the moving beam 1 of the third model are 2.5 mm and 3.0 mm respectively.

[0046] Combination Figure 4 and Figure 6 As shown, a slide groove 2a is provided at the middle position of the lower surface of the fixed beam 2, and the movable beam 1 is slidably matched with the slide groove 2a.

[0047] Combination Figure 3 and Figure 8 As shown, a vertical scale 3 is provided on the column block 6 ; and the scale 3 is located at the side of the moving beam 1 .

[0048] Combination Figure 3 As shown, a flange 7a is provided at the lower end of the column 7, and the flange 7a is screwed to the bottom plate 5 to form a detachable connection structure.

[0049] On the other hand, this embodiment also provides a method for visual inspection and correction of a shell casting, using the above-mentioned correction tool, including the following steps:

[0050] S1, placing the shell casting on the base plate 5;

[0051] S2, estimating the deformation of the hollow column 102 of the shell casting at the axial position, and selecting a suitable type of moving beam 1 according to the deformation;

[0052] S3, insert the fixed beam 2 and the movable beam 1 selected in step S2 into the cross mounting hole of the column block 6 respectively, and make the bottom of the groove between the two protruding blocks 1a on the movable beam 1 abut against the lower hole wall of the cross mounting hole of the column block 6; and insert a gasket 4 formed by stacking a plurality of gaskets 4a between the top surface of the fixed beam 2 and the upper hole wall of the cross mounting hole of the column block 6;

[0053] S4, four columns 7 are respectively installed at the ends of the movable beam 1 and the fixed beam 2, and the lower ends of the columns 7 are connected to the bottom plate 5, and the lower ends of the column blocks 6 are made to abut against the top surface of the hollow column 102 of the shell casting;

[0054] S5, according to the deformation estimated in step S2, extract one or two gaskets 4a of corresponding thickness, so that a gap appears between the top surface of the gasket block 4 formed by the remaining gaskets 4a and the upper hole wall of the cross mounting hole of the column block 6;

[0055] S6, using a press machine to vertically press the column block 6 to move the column block 6 downward;

[0056] S7, pulling the moving beam 1 along the axial direction of the moving beam 1, so that the protruding block 1a on the lower surface of the moving beam 1 abuts against the lower hole wall of the cross mounting hole of the column block 6;

[0057] S8. Perform stress relief annealing on the shell casting together with the tooling as a whole to eliminate thermal stress.

[0058] S9, dismantling tooling: When the stress relief annealing in step S8 is completed and the shell casting has cooled, spray lubricating oil on the cross mounting holes of the column block 6 and the connection parts between the column 7 and the movable beam 1 and the fixed beam 2. First, knock on the end of the movable beam 1 to remove it, and then knock on the end of the fixed beam 2 to remove it.

[0059] In step S6 , when the column block 6 is vertically pressed down by the press machine, the descending height of the column block 6 relative to the moving beam 1 is observed by using the scale 3 on the pressed column block 6 .

[0060] Repeat steps S5 to S8 to perform calibration twice.

[0061] Specifically, in step S2, the estimated deformation of the hollow column 102 of the shell casting at the axial position is 3.0 mm, so the third type of moving beam 1 is selected, and the thicknesses of the two protruding blocks 1a on the moving beam 1 of this type are 2.5 mm and 3.0 mm respectively.

[0062] Since the deformation is relatively large, two corrections are performed.

[0063] The first calibration operation is as follows:

[0064] First, two gaskets 4a with thicknesses of 1.0 mm and 1.5 mm are removed, so that a gap of 2.5 mm appears between the top surface of the gasket block 4 formed by the remaining gaskets 4a and the upper hole wall of the cross mounting hole of the column block 6.

[0065] The column block 6 is vertically pressed down by a press machine to move the column block 6 downward until the upper hole wall of the cross mounting hole of the column block 6 abuts against the top surface of the cushion block 4 formed by the remaining gasket 4a.

[0066] The moving beam 1 is pulled along the axial direction of the moving beam 1 , so that the protruding block 1 a with a thickness of 2.5 mm on the moving beam 1 abuts against the lower hole wall of the cross mounting hole of the column block 6 .

[0067] The shell casting and the tooling are subjected to stress relief annealing treatment as a whole to eliminate thermal stress.

[0068] Based on the first calibration, the second calibration operation is as follows:

[0069] Pull the moving beam 1 along the axial direction of the moving beam 1 so that the bottom of the groove between the two raised blocks 1a on the moving beam 1 is aligned with the lower hole wall of the cross mounting hole of the column block 6; reinsert the two gaskets 4a of 1.0 mm and 1.5 mm removed in the first calibration, and then proceed:

[0070] The two gaskets 4a with thicknesses of 1.0 mm and 2.0 mm are removed, so that a gap of 3.0 mm appears between the top surface of the gasket block 4 formed by the remaining gaskets 4a and the upper hole wall of the cross mounting hole of the column block 6.

[0071] The column block 6 is vertically pressed down by a press machine to move the column block 6 downward until the upper hole wall of the cross mounting hole of the column block 6 abuts against the top surface of the cushion block 4 formed by the remaining gasket 4a.

[0072] The moving beam 1 is pulled along the axial direction of the moving beam 1 , so that the protruding block 1 a with a thickness of 3.0 mm on the moving beam 1 abuts against the lower hole wall of the cross mounting hole of the column block 6 .

[0073] The shell casting and the tooling are subjected to stress relief annealing treatment as a whole to eliminate thermal stress.

[0074] The above description is only a preferred embodiment of the present invention, and does not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the inventive concept of the present invention, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A correction tool for a shell casting, characterized in that: It comprises a base plate (5), a movable beam (1), a fixed beam (2), a column block (6) and four columns (7); The movable beam (1) and the fixed beam (2) are arranged in a cross shape and inserted into the cross mounting hole of the column block (6), and the movable beam (1) is located below the fixed beam (2); the two ends of the movable beam (1) are respectively inserted transversely into the upper parts of two of the columns (7); the movable beam (1) is respectively slidably matched with the columns (7) and the column block (6); the two ends of the fixed beam (2) are respectively inserted transversely into the upper parts of the other two columns (7); the lower ends of the columns (7) are detachably connected to the bottom plate (1); A cushion block (4) is inserted between the top surface of the fixed beam (2) and the upper hole wall of the cross mounting hole of the column block (6), and the cushion block (4) is formed by stacking a plurality of cushions (4a) of different thicknesses; Two protruding blocks (1a) of different thicknesses are arranged at intervals on the lower surface of the moving beam (1); the thickness of each protruding block (1a) is equal to the thickness of one of the gaskets (4a), or equal to the sum of the thicknesses of two of the gaskets (4a).

2. A correction tool for a shell casting as claimed in claim 1, characterized in that: The thickness specifications of the gasket (4a) include 0.5mm, 1.0mm, 1.5mm, and 2.0mm.

3. A correction tool for a shell casting as claimed in claim 2, characterized in that: The movable beam (1) has three types; The thicknesses of the two protruding blocks (1a) on the moving beam (1) of the first type are 0.5 mm and 1.0 mm respectively; The thicknesses of the two protruding blocks (1a) on the second type of moving beam (1) are 1.5 mm and 2.0 mm respectively; The thicknesses of the two protruding blocks (1a) on the moving beam (1) of the third model are 2.5 mm and 3.0 mm respectively.

4. A correction tool for a shell casting as claimed in claim 1, characterized in that: A sliding groove (2a) is provided at a middle position of the lower surface of the fixed beam (2), and the movable beam (1) is slidably matched with the sliding groove (2a).

5. A correction tool for a shell casting as claimed in claim 1, characterized in that: A vertical scale (3) is provided on the column block (6); and the scale (3) is located at a side position of the moving beam (1).

6. A correction tool for a shell casting as claimed in claim 1, characterized in that: A flange (7a) is provided at the lower end of the column (7), and the flange (7a) is screw-connected to the base plate (5).

7. A method for correcting a shell casting, characterized in that: The correction tool according to claim 3 is used, comprising the following steps: S1, placing the shell casting on the base plate (5); S2, estimating the deformation of the hollow column (102) of the shell casting at the axial position, and selecting a suitable type of moving beam (1) according to the deformation; S3, inserting the fixed beam (2) and the movable beam (1) selected in step S2 into the cross mounting hole of the column block (6) respectively, and making the bottom of the groove between the two protruding blocks (1a) on the movable beam (1) abut against the lower hole wall of the cross mounting hole of the column block (6); and inserting a pad (4) formed by stacking a plurality of pads (4a) between the top surface of the fixed beam (2) and the upper hole wall of the cross mounting hole of the column block (6); S4, installing four columns (7) at the ends of the movable beam (1) and the fixed beam (2) respectively, and connecting the lower ends of the columns (7) to the bottom plate (5), and making the lower ends of the column blocks (6) abut against the top surface of the hollow column (102) of the shell casting; S5, according to the deformation estimated in step S2, extract one or two gaskets (4a) of corresponding thickness, so that a gap appears between the top surface of the gasket block (4) formed by the remaining gaskets (4a) and the upper hole wall of the cross mounting hole of the column block (6); S6, using a press machine to vertically press the column block (6) downward to move the column block (6); S7, pulling the movable beam (1) along the axial direction of the movable beam (1), so that the protruding block (1a) on the lower surface of the movable beam (1) abuts against the lower hole wall of the cross mounting hole of the column block (6); S8. Perform stress relief annealing on the shell casting and the correction fixture as a whole to eliminate thermal stress.

8. A method for visual inspection and correction of a shell casting as claimed in claim 7, characterized in that: The method further comprises step S9, removing the tooling: after the stress relief annealing in step S8 is completed and the shell casting is cooled, lubricating oil is sprayed on the cross mounting hole of the column block (6) and the connection parts between the column (7) and the movable beam (1) and the fixed beam (2), and the end of the movable beam (1) is first knocked to remove the movable beam (1), and then the end of the fixed beam (2) is knocked to remove the fixed beam (2).

9. A method for visual inspection and correction of a shell casting as claimed in claim 7, characterized in that: In the step S6, when the column block (6) is pressed vertically downward by a press machine, the descending height of the column block (6) relative to the moving beam (1) is observed by using the scale (3) on the pressed column block (6).

10. A method for visual inspection and correction of a shell casting according to claim 7, characterized in that: Repeat steps S5 to S8 to perform calibration twice.

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