Pre-deformation device and method for string array iron plate casting mold

Abstract

The chord iron plate casting mold pre-deformation device contains chord iron plate, mold bottom and face film, the bottom and face film are used together to cast chord iron plate, the bottom forms the front of chord iron plate, and the face film forms the back of chord iron plate, the first reference surface is arranged on the bottom, the second reference surface is arranged on the face film, the first and second reference surfaces are coincident after the mold is closed, the third reference surface is arranged on the chord iron plate, the third reference surface is coincident with the first and second reference surfaces after the mold is closed and cast, the first, second and third reference points are arranged on the third reference surface of chord iron plate, the reference blocks are arranged below each reference point, the first, second and third detection points are arranged at the opposite positions of each reference point, and the corresponding position points of each reference point and detection point are marked on the bottom and face film, the chord iron plate mold is pre-deformed according to the deformation rule of chord iron plate, the deformation is effectively controlled, the chord iron plate is stress-free installed, and the piano tone is improved.

Description

Technical Field

[0001] This invention relates to the field of piano manufacturing technology, and in particular to a pre-deformation device and method for string plate casting molds. Background Technology

[0002] The iron plate of the piano string assembly is the most important component of a piano, directly affecting its quality. A deformed iron plate, after the strings are hung, will deform again due to the total tension of the strings (15-20 kN). In severe cases, this can cause deformation of the back frame, leading to inaccurate tuning and making tuning difficult. In even more serious cases, it can cause the back frame to detach from its glue. To control the deformation of the iron plate and ensure the piano's sound quality, piano manufacturers have launched research projects, but currently, no effective deformation control method has been developed. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to provide a pre-deformation device and method for casting molds of chord iron plates, so as to control and solve the deformation problem in the casting and cooling process of chord iron plates.

[0004] To solve the above-mentioned technical problems, the technical solution adopted by the present invention is as follows: a pre-deformation device for a chordal iron plate casting mold, comprising a chordal iron plate, a mold bottom mold and a mold surface film, wherein the mold bottom mold and the mold surface film are used together to cast the chordal iron plate into shape, the mold bottom mold forms the front side of the chordal iron plate and the mold surface film forms the back side of the chordal iron plate.

[0005] In a preferred embodiment, a first reference surface is provided on the bottom mold, and a second reference surface is provided on the mold face film. After the mold is closed, the first reference surface and the second reference surface overlap and adhere tightly.

[0006] In a preferred embodiment, a third reference surface is provided on the chord plate. After the bottom mold and the top mold are molded and cast, the third reference surface coincides with the first reference surface and the second reference surface.

[0007] In a preferred embodiment, the third reference surface of the chord plate is further provided with a first reference point, a second reference point, and a third reference point. A reference block is provided below each reference point. A first detection point, a second detection point, and a third detection point are also provided at relative positions opposite each reference point. At the same time, the corresponding positions of each reference point and each detection point are marked on the bottom mold and the surface mold.

[0008] A method for relocating and reinforcing a steel sheet pile cofferdam in its original location, employing any one of the aforementioned structures for relocating and reinforcing a steel sheet pile cofferdam in its original location, the method comprising the following steps: A pre-deformation method for a chord-type iron plate casting mold, employing any one of the above-described pre-deformation devices for a chord-type iron plate casting mold, the method comprising the following steps: Step 1: Develop a pre-deformation plan; Step 2: Adjust the mold according to the pre-deformation plan; Step 3: After the mold is adjusted, the single piece of the chord iron plate is trial-produced and cast into shape; Step 4: Inspect and repair the cast and shaped chord plates; Step 5: After the cast chord plate passes inspection, draw new mold drawings and make new molds according to the adjusted mold dimensions. Step 6: After the single-piece trial production of the chord plate using the new mold is qualified, mass production begins.

[0009] The specific steps of step 1 are as follows: Step 1.1: Inspect each deformed string plate produced before mold adjustment and collect the data; Step 1.2: Analyze the deformation of the string-type iron plates based on the collected data; Step 1.3: Based on the analysis of the deformation situation, that is, the analysis of the deformation direction and data, formulate a pre-deformation scheme.

[0010] The specific method of step 1.1 is as follows: place three reference blocks on the inspection platform, with the third reference surface of the string plate facing downwards towards the inspection platform, and place its first reference point, second reference point and third reference point on the three reference blocks. Add shims to adjust the third reference surface to be horizontal, and check the height values ​​of the first detection point, the second detection point and the third detection point respectively. The method of checking the string plate in step 4 is the same as in step 1.1.

[0011] The specific method of step 1.2 is as follows: based on the data obtained from step 1.1, find the third reference plane, the deformed reference point and the detection point, and determine the deformation direction and size.

[0012] The specific method of step 1.3 is as follows: based on the deformation reference point and detection point determined in step 1.2, find the corresponding position points on the bottom mold and the mold surface, and make corresponding adjustments to the bottom mold and the mold surface according to the deformation direction and size.

[0013] The specific solution for step 1.3 is as follows: For points on the chord plate that are sunken relative to the third reference surface, the corresponding points on the bottom mold are raised by adding sand, with the raised dimension equal to the deformation dimension. The corresponding points on the mold surface are then ground to the corresponding dimension. Conversely, for points that are raised relative to the third reference surface, the corresponding points on the bottom mold are ground to lower, with the lowered dimension equal to the deformation dimension. The corresponding points on the mold surface are then sanded to the corresponding dimension, thereby ultimately ensuring the thickness dimension of the corresponding position on the chord plate.

[0014] The pre-deformation device and method for chord-type iron plate casting mold provided by the present invention have the following beneficial effects: 1. The setting of each reference surface in this invention ensures the precise mold closing of the mold bottom mold and the mold surface, and at the same time realizes the standardization of the design, manufacturing and assembly of the string plate, ensuring the manufacturing quality of the string plate, thereby further improving the overall quality of the piano. 2. The setting of various reference points, detection points and reference blocks in this invention enables the rapid and accurate detection of the chord plate, while quickly finding the direction and size of the deformation, and making precise adjustments to the mold, thereby further ensuring the accuracy and size of the casting quality control points of the chord plate; 3. The pre-deformation treatment scheme provided by this invention is simple, reliable, and easy to operate. In practice, it has effectively controlled the deformation of the string plate, realized stress-free installation of the string plate, and further improved the piano tone and overall quality.

[0015] 4. This invention effectively improves the manufacturing quality and pass rate of string plates, realizes the standard manufacturing and installation of string plates, saves the time of repeated rework and the selection and installation of related accessories, thereby further improving production efficiency and saving manufacturing costs. Attached Figure Description

[0016] The present invention will be further described below with reference to the accompanying drawings and embodiments: Figure 1 This is a schematic diagram of the structure of the present invention, in which the chord plate is placed on the reference block; Figure 2 This is a top view of the chord plate of the present invention placed on a reference block; Figure 3 This is a simplified schematic diagram of the bottom mold structure of the mold of the present invention; Figure 4 This is a top view of the bottom mold of the mold of the present invention; Figure 5 This is a simplified schematic diagram of the mold surface structure of the present invention; Figure 6 This is a top view of the mold face of the present invention; In the diagram: 1. String plate, 2. Mold base mold, 3. Mold face, 4. First reference surface, 5. Second reference surface, 6. Third reference surface, 7. First reference point, 8. Second reference point, 9. Third reference point, 10. Reference block, 11. First detection point, 12. Second detection point, 13. Detailed Implementation

[0017] like Figures 1-6As shown, the pre-deformation device for the casting mold of the chord plate includes the chord plate 1, the bottom mold 2, and the mold face 3. The bottom mold 2 and the mold face 3 are used together to cast the chord plate 1. The bottom mold 2 forms the front side of the chord plate 1, and the mold face 3 forms the back side of the chord plate 1.

[0018] In this embodiment, a first reference surface 4 is provided on the bottom mold 2, and a second reference surface 5 is provided on the mold face 3. After the mold is closed, the first reference surface 4 and the second reference surface 5 overlap and adhere tightly. The chord plate 1 is provided with a third reference surface 6. After the bottom mold 2 and the mold face 3 are closed and cast, the third reference surface 6 coincides with the first reference surface 4 and the second reference surface 5. The third reference surface 6 of the string plate 1 is also provided with a first reference point 7, a second reference point 8 and a third reference point 9. A reference block 10 is provided below each reference point. A first detection point 11, a second detection point 12 and a third detection point 13 are also provided at the relative positions opposite each reference point. At the same time, the corresponding positions of each reference point and each detection point are marked on the bottom mold 2 and the mold surface 3.

[0019] In practical use, the method of pre-deformation treatment using the pre-deformation device for the chordal iron plate casting mold described in any one of the above-mentioned methods includes the following steps: Step 1: Develop a pre-deformation plan; Step 2: Adjust the mold according to the pre-deformation plan; Step 3: After the mold is adjusted, the single piece of the chord iron plate 1 is trial-produced and cast into shape; Step 4: Inspect and repair the cast and shaped chord plate 1; Step 5: After the cast chord plate 1 passes inspection, draw a new mold drawing based on the adjusted mold dimensions and make the new mold. Step 6: After the single-piece trial production of the chord plate 1 using the new mold is qualified, mass production will begin.

[0020] The specific steps of step 1 are as follows: Step 1.1: Inspect each deformed string plate 1 produced before mold adjustment and collect the data; Step 1.2: Analyze the deformation of the string plate 1 based on the collected data; Step 1.3: Based on the analysis of the deformation situation, that is, the analysis of the deformation direction and data, formulate a pre-deformation scheme.

[0021] The specific method of step 1.1 is as follows: place three reference blocks 10 on the inspection platform, with the third reference surface 6 of the string plate 1 facing downwards towards the inspection platform, and its first reference point 7, second reference point 8 and third reference point 9 resting on the three reference blocks 10. Add shims to adjust the third reference surface 6 to be horizontal, and check the height values ​​of the first detection point 11, the second detection point 12 and the third detection point 13 respectively. The method of checking the string plate 1 in step 4 is the same as in step 1.1.

[0022] The specific method of step 1.2 is as follows: based on the data obtained from step 1.1, find the third reference plane 6 and the deformed reference point and detection point, and determine the deformation direction and size.

[0023] The specific method of step 1.3 is as follows: based on the deformation reference point and detection point determined in step 1.2, find the corresponding position points on the mold bottom mold 2 and the mold surface 3, and make corresponding adjustments to the mold bottom mold 2 and the mold surface 3 according to the deformation direction and size.

[0024] The specific solution for step 1.3 is as follows: for the points on the chord plate 1 that are sunken relative to the third reference surface 6, the corresponding points on the bottom mold 2 are raised by adding sand, with the raised size equal to the deformation size. The corresponding points on the mold surface 3 are then ground to the corresponding size. Conversely, for the points that are raised relative to the third reference surface 6, the corresponding points on the bottom mold 2 are ground to lower, with the lowered size equal to the deformation size. The corresponding points on the mold surface 3 are then sanded to the corresponding size, thereby ultimately ensuring the thickness size of the corresponding position of the chord plate 1.

[0025] In the preferred embodiment, the bottom mold 2 is provided with a first reference surface 4, and the mold face 3 is provided with a second reference surface 5. After the mold is closed, the first reference surface 4 and the second reference surface 5 overlap and adhere tightly. The above arrangement effectively ensures that the reference surfaces of the bottom mold 2 and the mold face 3 are effectively adhered, and the mold is closed accurately and tightly, thereby further ensuring the casting quality of the chord iron plate 1.

[0026] In a preferred embodiment, a third reference surface 6 is provided on the string plate 1. After the bottom mold 2 and the mold face 3 are molded and cast, the third reference surface 6 coincides with the first reference surface 4 and the second reference surface 5. The above arrangement effectively ensures that the three references for the design, manufacturing and assembly of the string plate 1 are effectively coincided, thereby further improving the manufacturing quality of the string plate 1.

[0027] In a preferred embodiment, the third reference surface 6 of the chord plate 1 is further provided with a first reference point 7, a second reference point 8, and a third reference point 9. A reference block 10 is provided below each reference point. A first detection point 11, a second detection point 12, and a third detection point 13 are also provided at relative positions opposite each reference point. At the same time, the corresponding positions of each reference point and each detection point are marked on the bottom mold 2 and the mold surface 3. The above settings enable the deformation direction and size of the chord plate 1 to be found quickly, and the mold to be adjusted precisely, thereby further ensuring the accuracy and size of the casting quality control points of the chord plate 1.

[0028] In the preferred embodiment, the pre-deformation device for the chordal iron plate casting mold includes a chordal iron plate 1, a mold bottom mold 2, and a mold face mold 3. The mold bottom mold 2 and the mold face mold 3 are used together to cast the chordal iron plate 1. The mold bottom mold 2 forms the front side of the chordal iron plate 1, and the mold face mold 3 forms the back side of the chordal iron plate 1. The above configuration enables the chordal iron plate 1 to be precisely cast while improving production efficiency and saving manufacturing costs.

[0029] The pre-deformation device and method for the string plate casting mold provided by this invention finds the deformation law and size of the string plate 1, solves and controls the deformation problem of the string plate 1 during casting and cooling, effectively controls the deformation of the string plate 1, realizes stress-free installation of the string plate 1, thereby further improving the piano tone and its overall quality, and has good economic and social benefits.

Claims

1. A pre-deformation method for a chord-type iron plate casting mold, characterized in that: Based on a pre-deformation device for a chord-type iron plate casting mold, the method includes the following steps: Step 1: Develop a pre-deformation plan; Step 1.1: Inspect each of the deformed string plate (1) produced before mold adjustment, and collect data. The specific method is as follows: Place three reference blocks (10) on the inspection platform, with the third reference surface (6) of the string plate (1) facing down towards the inspection platform, and its first reference point (7), second reference point (8) and third reference point (9) resting on the three reference blocks (10). Add shims to adjust the third reference surface (6) to be horizontal, and check the height values ​​of the first detection point (11), the second detection point (12) and the third detection point (13) respectively. Step 1.2: Analyze the deformation of the string plate (1) based on the collected data; Step 1.3: Based on the analysis of the deformation situation, that is, the analysis of the deformation direction and data, formulate a pre-deformation scheme; Step 2: Adjust the mold according to the pre-deformation plan; Step 3: After the mold is adjusted, the single piece of the chord iron plate (1) is trial-produced and cast into shape; Step 4: Inspect and repair the cast chord plate (1); Step 5: After the cast iron plate (1) passes the acceptance test, draw a new mold drawing according to the adjusted mold size and make a new mold; Step 6: After the single-piece trial production of the chord plate using the new mold is qualified, mass production will begin; The pre-deformation device for the chord plate casting mold includes a chord plate (1), a bottom mold (2), and a mold face film (3). The bottom mold (2) and the mold face film (3) are used together to cast the chord plate (1). The bottom mold (2) forms the front side of the chord plate (1), and the mold face film (3) forms the back side of the chord plate (1). A first reference surface (4) is provided on the bottom mold (2), and a second reference surface (5) is provided on the mold face film (3). After the mold is closed, the first reference surface (4) and the second reference surface (5) overlap and adhere tightly. A third reference surface is provided on the chord plate (1). After the mold bottom mold (2) and mold face film (3) are molded and cast, the third reference surface (6) coincides with the first reference surface (4) and the second reference surface (5). The third reference surface (6) is provided with the first reference point (7), the second reference point (8) and the third reference point (9). A reference block (10) is provided below each reference point. The first detection point (11), the second detection point (12) and the third detection point (13) are also provided at the relative positions opposite each reference point. At the same time, the corresponding positions of each reference point and each detection point are marked on the mold bottom mold (2) and the mold face film (3).

2. The pre-deformation method for a chordal iron plate casting mold according to claim 1, characterized in that, The specific method of Step 1.2 is as follows: based on the data obtained from Step 1.1, find the reference point and detection point of the third reference plane (6) and the deformed chord plate (1), and determine the deformation direction and size.

3. The pre-deformation method for a chordal iron plate casting mold according to claim 1, characterized in that, The specific method of Step 1.3 is as follows: based on the deformation reference point and detection point determined in Step 1.2, find the corresponding position points on the bottom mold (2) and the mold surface (3), and make corresponding adjustments to the bottom mold (2) and the mold surface (3) according to the deformation direction and size.

4. The pre-deformation method for a chordal iron plate casting mold according to claim 1, characterized in that, The specific solution of Step 1.3 is as follows: For the point on the chord plate (1) that sinks relative to the third reference surface (6), the corresponding point on the bottom mold (2) is raised by sanding, and the raised size is equal to the deformation size. The corresponding point on the mold surface (3) is then ground to the corresponding size. Conversely, for the point that rises relative to the third reference surface (6), the corresponding point on the bottom mold (2) is ground to the lower size, and the lowered size is equal to the deformation size. The corresponding point on the mold surface (3) is then sanded to the corresponding size, thereby ensuring the thickness size of the corresponding position of the chord plate (1).

5. The pre-deformation method for a chordal iron plate casting mold according to claim 1, characterized in that: The method for checking the string plate (1) in Step 4 is the same as the method in Step 1.1.

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