Correction method for tooling eccentricity

Abstract

A correction method for tooling eccentricity is provided. The online measurement function of the machine tool is used to collect data on the points of relevant elements, establish the relationship between the center point of the part and the center point of the machine tool rotation, and establish a common association between the part center datum, the tooling center datum, and the machine tool rotation center through logical operations. This enables rapid adjustment and correction of multiple sets of the same tooling, ensures the consistency of the relative position of each set of tooling and the machine tool rotation center after clamping, and guarantees the quality of batch processing of parts.

Description

Technical Field

[0001] The invention belongs to the technical field of deviation correction, and in particular relates to a method for correcting tool eccentricity. Background Art

[0002] In recent years, with the increasing automation of parts production, automated production lines have sprung up like mushrooms after rain. The widespread adoption of automated production models has shifted the traditional production model's demand for human skill to a new model that places high demands on tooling manufacturing precision and clamping consistency. To improve tooling clamping consistency, the manufacturing precision of the tooling is typically increased, keeping the cumulative values of clamping and manufacturing errors within the required range. However, this increased tooling manufacturing precision increases the difficulty of tooling production and extends the production cycle, which, from a macro perspective, has hindered the rapid development of the entire manufacturing industry.

[0003] With the popularity of automated production lines, new processing procedures have determined that the probability of a part being processed online simultaneously under the same clamping state is getting higher and higher, so the tooling with the same clamping method will be used multiple times and in multiple sets in the same or multiple production lines. In order to ensure the consistency of the accuracy of the tooling after repeated clamping, the traditional solution is to improve the design and manufacturing accuracy of the tooling, and to manually use alignment tools such as a scale to align and adjust the positioning reference of the newly installed tooling each time the tooling is installed. What's more, the positioning reference of the tooling needs to be processed twice, which not only destroys the design reference of the tooling, but also causes uncertainty in the tooling status, which is one of the important reasons for the generation of waste. Figure 3-4 For example: When the position of cylindrical pin 1 and diamond pin 2 on tooling 6 connected to the part is out of tolerance relative to cylindrical pin 2 3 connecting tooling 6 to the machine tool worktable 5 and does not meet the part processing requirements, the conventional remedial measures are: rework or replace cylindrical pin 1 and diamond pin 2, design the two standard pins into non-standard, eccentric pins, and remake and assemble them.

[0004] The defects of traditional measures for correcting tooling eccentricity are: ① Manual alignment is time-consuming and subject to the skill level of each operator, resulting in uncontrollable tooling alignment time and precision adjustment errors; ② When the actual positioning reference size is smaller than the lower limit of the design size, the reference size cannot be repaired on site. At this time, it can only be replaced by remaking a new positioning reference component, which lengthens the production cycle of the tooling and increases the workload. After the repaired tooling is reassembled, it still needs to perform related work such as alignment and adjustment; ③ After the same type and multiple sets of tooling are installed on different machine tools, ensuring that each set of tooling is consistent with the machine tool's rotation center puts extremely high demands on the tooling installation; therefore, in order to solve the above problems, it is necessary to make improvements. Summary of the Invention

[0005] The technical problem solved by the present invention is: to provide a correction method for tooling eccentricity, which utilizes the online measurement function of the machine tool to collect data on the points of relevant elements, establishes the relationship between the center point of the part and the center point of rotation of the machine tool, and establishes a universal correlation between the part center reference, the tooling center reference, and the machine tool rotation center through logical operations, thereby realizing rapid adjustment and correction of multiple sets of the same tooling, ensuring the consistency of the relative position of each set of tooling and the machine tool rotation center after clamping, and ensuring the quality of batch processing of parts.

[0006] The technical solution adopted by the present invention is a method for correcting tool eccentricity, comprising the following steps:

[0007] 1) Mill a horizontal slot plane and a vertical slot plane on each set of tooling involved in production. The vertical distance C1 between the horizontal slot plane and the center of the reference hole for cylindrical pin 1 on each set of tooling is required to be equal, and the horizontal distance C2 between the vertical slot plane and the center of the reference hole for cylindrical pin 1 is required to be equal. In this way, the reference hole for cylindrical pin 1 on each set of tooling can be moved to the horizontal slot plane and the vertical slot plane.

[0008] 2) Establish the relationship between the tooling and the center of the machine table: Position the tooling on the table through cylindrical pin 2 and diamond pin 2, and press and fix the tooling on the table with several screws;

[0009] 3) Online measurement: Use the online measurement function of the machine tool to measure the vertical distance C between the mechanical origin and the horizontal slot plane of the tooling in the mechanical coordinate system. 测 The horizontal distance D between the mechanical origin and the vertical slot plane of the tooling 测 ;

[0010] 4) Establish the association between the part and the tooling: The part is positioned on the tooling through the cylindrical pin 1 and the diamond pin. Let the center point of the part be A and the center point of the tooling be B. When the position dimension a of the cylindrical pin 1 is 1B and a 2B When the center point B of the tooling is out of tolerance, the center point A of the part and the center point B of the tooling will not coincide. The horizontal distance a from the center point A of the part to the center of the reference hole of the cylindrical pin is known. 2A and vertical distance a 1A Therefore, the mechanical coordinates of the center point A of the part can be determined in the mechanical coordinate system (-X A , Z A )as follows:

[0011] -X A =-D 测 -C2+a 2A , Z A =C 测 -C1+a 1A

[0012] In the above, C1 is the vertical distance between the horizontal slot plane on the tooling and the center of the reference hole of the cylindrical pin 1, and C2 is the horizontal distance between the vertical slot plane on the tooling and the center of the reference hole of the cylindrical pin 1;

[0013] 5) Establish the relationship between the part and the machine tool rotation center: Let the coordinates of the machine tool rotation center point O in the mechanical coordinate system be (X O , Z O ), the distance difference between the center point A of the part and the center point O of the machine tool is calculated as follows:

[0014] ΔX=|X O -X A |, ΔZ=|Z O -Z A |

[0015] In the above formula, C1 is the vertical distance between the horizontal slot plane on the tooling and the center of the reference hole of cylindrical pin one, C2 is the horizontal distance between the vertical slot plane on the tooling and the center of the reference hole of cylindrical pin one, ΔX is the horizontal distance between the part center point A and the machine tool rotation center point O, and ΔZ is the vertical distance between the part center point A and the machine tool rotation center point O;

[0016] 6) Determine the coordinate quadrant: For the center point A(X A , Z A ) and the machine tool rotation center point O(X O , Z O ) to determine the coordinate quadrant of the rotation center O where the part center point A is located in the coordinate system with the rotation center O of the machine tool as the origin;

[0017] 7) According to the quadrant in which the part center point A is located in the coordinate system with the machine tool rotation center point O as the origin, as well as the horizontal distance ΔX and vertical distance ΔZ between the part center point A and the machine tool rotation center point O, adjust the part center point A and the machine tool rotation center point O to coincide.

[0018] Furthermore, a sink is formed at one corner of the tooling, and the horizontal side wall and the vertical side wall of the sink are the horizontal sink plane and the vertical sink plane respectively.

[0019] The advantages of the present invention compared with the prior art are:

[0020] 1. This technical solution uses the online measurement function of the machine tool to collect data on the points of relevant elements, thereby obtaining real and effective basic data, which facilitates the correctness and effectiveness of the subsequent logical relationship establishment;

[0021] 2. This technical solution establishes the relationship between the part center point and the machine tool rotation center point, and establishes a universal association between the part center datum, the tooling center datum, and the machine tool rotation center through logical operations, enabling rapid adjustment and correction of multiple sets of the same tooling, ensuring the consistency of the relative position of each set of tooling and the machine tool rotation center after clamping, and ensuring the quality of batch processing of parts;

[0022] 3. This technical solution can quickly establish an association between the part center and the machine tool rotation center, control the part processing accuracy, adapt to the unmanned and efficient processing mode of the automated production line, and quickly center irregular parts. The entire logical operation and judgment method is universal, which facilitates transplantation and subsequent scalability when equipment is changed. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 A diagram showing the dimensional relationship between the center point of the part and the center point of the tooling in the mechanical coordinate system of the present invention;

[0024] Figure 2 This is a dimensional relationship diagram between the center point of the part of the present invention and the center point of rotation of the machine tool in the mechanical coordinate system;

[0025] Figure 3 This is the main view of the positional relationship between the tooling and the machine tool worktable;

[0026] Figure 4 It is a top view of the positional relationship between the tooling and the machine tool table; DETAILED DESCRIPTION

[0027] The following is a combination of the embodiments of the present invention Figure 1-4 The technical solutions in the embodiments of the present invention are clearly and completely described. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0028] It should be noted that, as used herein, the terms "comprise," "include," or any other variations thereof are intended to encompass non-exclusive inclusion, such that a process, method, article, or apparatus comprising a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus. In the absence of further limitations, the phrase "comprising a..." does not preclude the presence of additional identical elements in the process, method, article, or apparatus comprising the elements.

[0029] The correction method for tooling eccentricity includes the following steps:

[0030] 1) A horizontal slot plane 8 and a vertical slot plane 7 are milled on each set of tooling 6 involved in production, and it is required that the vertical distance C1 between the horizontal slot plane 8 and the center of the reference hole of the cylindrical pin 1 on each set of tooling 6 is equal, and the horizontal distance C2 between the vertical slot plane 7 and the center of the reference hole of the cylindrical pin 1 is equal. In this way, the reference hole of the cylindrical pin 1 on each set of tooling 6 can be moved to the horizontal slot plane 8 and the vertical slot plane 7; specifically, a recessed groove is formed at one corner of the tooling 6, and the horizontal side groove wall and the vertical side groove wall of the recessed groove are the horizontal slot plane 8 and the vertical slot plane 7, respectively.

[0031] 2) Establishing the relationship between the tool 6 and the center of the machine table 5: Positioning the tool 6 on the table 5 through the cylindrical pin 2 3 and the diamond pin 2 4, and pressing and fixing the tool 6 on the table 5 with several screws;

[0032] 3) Online measurement: Use the online measurement function of the machine tool to measure the vertical distance C between the mechanical origin and the horizontal slot plane 8 of the tooling 6 in the mechanical coordinate system. 测 The horizontal distance D between the mechanical origin and the vertical slot plane 7 of the tooling 6 测 ;

[0033] 4) Establish the association between the part and the tool 6: Position the part on the tool 6 through the cylindrical pin 1 and the diamond pin 2. Let the center point of the part be A and the center point of the tool 6 be B. When the position dimension a of the cylindrical pin 1 is 1B and a 2B When the center point B of tool 6 is out of tolerance, the center point A of the part and the center point B of tool 6 will not coincide. The horizontal distance a from the center point A of the part to the center of the reference hole of cylindrical pin 1 is known. 2A and vertical distance a 1A Therefore, the mechanical coordinates of the center point A of the part can be determined in the mechanical coordinate system (-X A , Z A )as follows:

[0034] -X A =-D 测 -C2+a 2A , Z A =C 测 -C1+a 1A

[0035] In the above, C1 is the vertical distance between the horizontal groove plane 8 on the tool 6 and the center of the reference hole of the cylindrical pin 1, and C2 is the horizontal distance between the vertical groove plane (7) on the tool 6 and the center of the reference hole of the cylindrical pin 1. C1 and C2 can be directly measured.

[0036] 5) Establish the relationship between the part and the machine tool rotation center: Let the coordinates of the machine tool rotation center point O in the mechanical coordinate system be (X O , ZO ), the distance difference between the center point A of the part and the center point O of the machine tool is calculated as follows:

[0037] ΔX=|X O -X A |, ΔZ=|Z O -Z A |

[0038] In the above formula, ΔX is the horizontal distance between the center point A of the part and the center point O of the machine tool rotation, and ΔZ is the vertical distance between the center point A of the part and the center point O of the machine tool rotation;

[0039] 6) Determine the coordinate quadrant: For the center point A(X A , Z A ) and the machine tool rotation center point O(X O , Z O ) to determine the coordinate quadrant of the rotation center O where the part center point A is located in the coordinate system with the rotation center O of the machine tool as the origin;

[0040] 7) According to the quadrant in which the part center point A is located in the coordinate system with the machine tool rotation center point O as the origin, as well as the horizontal distance ΔX and vertical distance ΔZ between the part center point A and the machine tool rotation center point O, the part center point A and the machine tool rotation center point O are adjusted to coincide with each other; the part eccentricity caused by tooling manufacturing and assembly errors is accurately and quickly corrected, and the two points A and O are coincident, thereby avoiding the eccentricity error caused by the random combination of parts, tooling 6, and machine tools during production and manufacturing, and improving the processing accuracy of parts in mass production.

[0041] In the above calculation method, the online measurement function of the machine tool is used to collect data on the points of relevant elements, so as to obtain real and effective basic data, which is convenient for the correctness and effectiveness of the subsequent logical relationship establishment. Through logical operations, a universal correlation is established between the part center reference, the tooling center reference, and the machine tool rotation center, so as to realize the rapid adjustment and correction of the same type and multiple sets of tooling 6, ensure the consistency of the relative position of each set of tooling 6 and the machine tool rotation center after clamping, and ensure the quality of batch processing of parts.

[0042] This technical solution can quickly correct the problem of tooling eccentricity, establish a correlation between the part center and the machine tool rotation center, control the part processing accuracy, adapt to the unmanned and efficient processing mode of the automated production line, and quickly center irregular parts. The entire logical operation and judgment method is universal, which facilitates transplantation and subsequent scalability when equipment is changed.

[0043] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the invention can be embodied in other specific forms without departing from the spirit or essential characteristics of the invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the invention is defined by the appended claims, not the foregoing description, and all variations within the meaning and range of equivalents of the claims are intended to be included therein. Any reference sign in a claim should not be construed as limiting the claim to which it relates.

[0044] In addition, it should be understood that although this specification is described in terms of implementation methods, not every implementation method contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

Claims

1. Tool eccentricity correction method, characterized in that The following steps are involved: 1) Milling a horizontal slot plane (8) and a vertical slot plane (7) on each set of tooling (6) involved in production, and requiring that the vertical distance C1 between the horizontal slot plane (8) and the center of the reference hole of the cylindrical pin (1) on each set of tooling (6) is equal, and the horizontal distance C2 between the vertical slot plane (7) and the center of the reference hole of the cylindrical pin (1) is equal, so that the reference hole of the cylindrical pin (1) on each set of tooling (6) can be moved to the horizontal slot plane (8) and the vertical slot plane (7); 2) Establishing the relationship between the tool (6) and the center of the machine tool workbench (5): positioning the tool (6) on the workbench (5) through the cylindrical pin 2 (3) and the diamond pin 2 (4), and pressing and fixing the tool (6) on the workbench (5) through several screws; 3) Online measurement: Use the online measurement function of the machine tool to measure the vertical distance C between the mechanical origin and the horizontal slot plane (8) of the tooling (6) in the mechanical coordinate system. 测 The horizontal distance D between the mechanical origin and the vertical slot plane (7) of the tooling (6) 测 ; 4) Establish the relationship between the part and the tooling (6): Position the part on the tooling (6) through the cylindrical pin (1) and the diamond pin (2). Let the center point of the part be A and the center point of the tooling (6) be B. When the position dimension a of the cylindrical pin (1) is 1B and a 2B When the center point B of the tool (6) is out of tolerance, the center point A of the part and the center point B of the tool (6) will not coincide. The horizontal distance a from the center point A of the part to the center of the reference hole of the cylindrical pin (1) is known. 2A and vertical distance a 1A Therefore, the mechanical coordinates of the center point A of the part can be determined in the mechanical coordinate system (-X A , Z A )as follows: -X A =-D 测 -C2+a 2A ,Z A =C 测 -C1+a 1A In the above, C1 is the vertical distance between the horizontal groove plane (8) on the tool (6) and the center of the reference hole of the cylindrical pin (1), and C2 is the horizontal distance between the vertical groove plane (7) on the tool (6) and the center of the reference hole of the cylindrical pin (1); 5) Establish the relationship between the part and the machine tool rotation center: Let the coordinates of the machine tool rotation center point O in the mechanical coordinate system be (X O , Z O ), the distance difference between the center point A of the part and the center point O of the machine tool is calculated as follows: ΔX=|X O -X A |,ΔZ=|Z O -Z A | In the above formula, ΔX is the horizontal distance between the center point A of the part and the center point O of the machine tool rotation, ΔZ is the vertical distance between the center point A of the part and the center point O of the machine tool rotation, ΔX is the horizontal distance between the center point A of the part and the center point O of the machine tool rotation, ΔZ is the vertical distance between the center point A of the part and the center point O of the machine tool rotation; 6) Determine the coordinate quadrant: For the center point A(X A , Z A ) and the machine tool rotation center point O(X O , Z O ) to determine the coordinate quadrant of the rotation center O where the part center point A is located in the coordinate system with the rotation center O of the machine tool as the origin; 7) According to the quadrant in which the part center point A is located in the coordinate system with the machine tool rotation center point O as the origin, as well as the horizontal distance ΔX and vertical distance ΔZ between the part center point A and the machine tool rotation center point O, adjust the part center point A and the machine tool rotation center point O to coincide.

2. The tool eccentricity correction method according to claim 1, characterized in that: A sink groove is formed at one corner of the tooling (6), and the horizontal side groove wall and the vertical side groove wall of the sink groove are respectively a horizontal groove plane (8) and a vertical groove plane (7).

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