Machining size adjusting method for automobile steering knuckle

Abstract

The invention provides an automobile steering knuckle machining size adjusting method which comprises the steps that a plurality of auxiliary evaluation coordinate systems are established based on a three-coordinate basic coordinate system of automobile steering knuckle machining, and the auxiliary evaluation coordinate systems correspond to workpiece coordinate systems of a machining center one to one; establishing evaluation of the three-coordinate basic coordinate system at the position of the auxiliary evaluation coordinate system, wherein evaluation elements are machining elements which are the same as the machining center; measuring the steering knuckle by using a three-coordinate machine to obtain a measurement result; and finishing the machining size adjustment of the steering knuckle based on the measurement result and the evaluation. An auxiliary evaluation coordinate system is established, evaluation of the position of a three-coordinate basic coordinate system in the auxiliary evaluation coordinate system is established, and after a three-coordinate machine is used for measurement to obtain a measurement result, machining size adjustment of the steering knuckle can be completed based on the auxiliary evaluation coordinate system and evaluation. Therefore, the purpose of improving the machining size adjusting efficiency of the automobile steering knuckle machine is achieved.

Description

Technical Field

[0001] The invention belongs to the technical field of machining of automobile steering knuckle parts, and in particular relates to a method for adjusting the machining size of an automobile steering knuckle. Background Art

[0002] The steering knuckle is one of the important parts in the chassis of the car. It is divided into the front wheel steering knuckle and the rear wheel steering knuckle. It is a non-standard part that can make the car run stably and sensitively transmit the driving direction. Generally, the steering knuckle is composed of 10-15 holes and plane elements with different spatial angles, and is usually processed by a single or multiple sequence of the machining center. The size results of the steering knuckle will be obtained by measuring the three-coordinate machine, and the measurement result data is the same as the product drawing. In order to facilitate the processing of the steering knuckle, multiple workpiece coordinate systems will be set when programming the machining center. The three-coordinate measurement results cannot accurately reflect the deviation value of the workpiece coordinate system of the machining center. When adjusting the processing size of the steering knuckle, the numerical results of the three-coordinate measurement need to be converted into the coordinate values ​​of the workpiece coordinate system of the machining center to achieve the size adjustment of the steering knuckle.

[0003] In order to process the steering knuckle of qualified size, the coordinate value of the workpiece coordinate system of the machining center needs to be frequently adjusted. The adjustment amount of the coordinate value of the machining center needs to be converted from the three-coordinate measurement result to the value of the workpiece coordinate system of the machining center, which accounts for about 70% of the total adjustment time and has low accuracy. It is necessary to convert the coordinates in the XYZ direction and obtain them by theoretical calculation or estimation. That is, the existing technology has the problem of slow machining size adjustment and low accuracy. Summary of the invention

[0004] In view of the problems existing in the prior art, the present invention provides a method for adjusting the machining dimensions of an automobile steering knuckle, which at least partially solves the problems of slow machining dimension adjustment and low accuracy existing in the prior art.

[0005] An embodiment of the present invention provides a method for adjusting the machining size of an automobile steering knuckle, comprising:

[0006] Establish multiple auxiliary evaluation coordinate systems based on the basic coordinate system of the three coordinates of the automobile steering knuckle machining, and the auxiliary evaluation coordinate systems correspond one-to-one to the workpiece coordinate system of the machining center;

[0007] Establish the evaluation of the position of the basic coordinate system of the three-coordinate system in the auxiliary evaluation coordinate system, and the evaluation elements are the same processing elements as those of the machining center;

[0008] Use a three-coordinate machine to measure the steering knuckle and obtain the measurement results;

[0009] The knuckle is machined and dimensioned based on the measurement results and evaluation.

[0010] Optionally, the auxiliary evaluation coordinate system is obtained by rotating and / or translating the basic coordinate system of the three coordinates.

[0011] Optionally, the rotation and / or translation value is obtained based on the processing design dimension of the steering knuckle and the median value of the tolerance band of the design dimension.

[0012] Optionally, the evaluation element is an element obtained by three-coordinate measurement of the steering knuckle.

[0013] Optionally, the evaluation elements include hole elements and plane elements.

[0014] Optionally, the hole element refers to an actual element of the steering knuckle obtained by three-coordinate measurement, and the hole element includes a straight hole, a threaded hole, a tapered hole, a semicircular hole or a hole axis.

[0015] Optionally, the plane element is an actual plane of the steering knuckle obtained by three-coordinate measurement.

[0016] Optionally, the evaluation includes hole position accuracy and plane contour accuracy, and the hole position accuracy and plane contour accuracy are set with corresponding tolerance zones according to the processing design requirements of the steering knuckle.

[0017] Optionally, the evaluation includes an XYZ direction of a feature of an element processed by the machining center, and the XYZ direction is determined based on the evaluated feature of the element.

[0018] Optionally, the auxiliary evaluation coordinate system has the same name and position as the workpiece coordinate system of the corresponding machining center.

[0019] The present invention provides a method for adjusting the size of a steering knuckle during machining, by establishing an auxiliary evaluation coordinate system, establishing an evaluation of the position of the basic coordinate system of the three-coordinate system in the auxiliary evaluation coordinate system, and after the three-coordinate machine is used to measure and obtain the measurement result, the steering knuckle can be adjusted based on the auxiliary evaluation coordinate system and the evaluation, thereby achieving the purpose of improving the efficiency of adjusting the size of the steering knuckle during machining. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The above and other objects, features and advantages of the present invention will become more apparent through a more detailed description of exemplary embodiments of the present invention in conjunction with the accompanying drawings, wherein like reference numerals generally represent like components throughout the exemplary embodiments of the present invention.

[0021] Figure 1 A schematic diagram of a basic coordinate system established by the three coordinates disclosed in an embodiment of the present invention when measuring a steering knuckle;

[0022] Figure 2 A schematic diagram of the auxiliary evaluation coordinate system disclosed in an embodiment of the present invention. DETAILED DESCRIPTION

[0023] The embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0024] It should be clear that the following embodiments of the present invention are described by specific specific examples, and those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments. The present invention can also be implemented or applied through other different specific embodiments, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that the following embodiments and features in the embodiments can be combined with each other without conflict. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in the field without making creative work belong to the scope of protection of the present invention.

[0025] It should be noted that various aspects of the embodiments within the scope of the appended claims are described below. It should be apparent that the aspects described herein can be embodied in a wide variety of forms, and any specific structure and / or function described herein is merely illustrative. It should be understood by those skilled in the art based on the invention that an aspect described herein can be implemented independently of any other aspect, and two or more of these aspects can be combined in various ways. For example, any number of aspects described herein can be used to implement the device and / or practice the method. In addition, other structures and / or functionalities other than one or more of the aspects described herein can be used to implement this device and / or practice this method.

[0026] It should also be noted that the illustrations provided in the following embodiments are only schematic illustrations of the basic concept of the present invention. The illustrations only show components related to the present invention rather than being drawn according to the number, shape and size of components in actual implementation. In actual implementation, the type, quantity and proportion of each component may be changed arbitrarily, and the component layout may also be more complicated.

[0027] Additionally, in the following description, specific details are provided to facilitate a thorough understanding of the examples. However, it will be understood by those skilled in the art that the aspects described may be practiced without these specific details.

[0028] This embodiment discloses a method for adjusting the machining size of an automobile steering knuckle, comprising:

[0029] Establish multiple auxiliary evaluation coordinate systems based on the basic coordinate system of the three coordinates of the automobile steering knuckle machining, and the auxiliary evaluation coordinate systems correspond one-to-one to the workpiece coordinate system of the machining center;

[0030] Establish the evaluation of the position of the basic coordinate system of the three-coordinate system in the auxiliary evaluation coordinate system, and the evaluation elements are the same processing elements as those of the machining center;

[0031] Use a three-coordinate machine to measure the steering knuckle and obtain the measurement results;

[0032] The knuckle is machined and dimensioned based on the measurement results and evaluation.

[0033] Optionally, the auxiliary evaluation coordinate system is obtained by rotating and / or translating the basic coordinate system of the three coordinates.

[0034] Optionally, the rotation and / or translation value is obtained based on the processing design dimension of the steering knuckle and the median value of the tolerance band of the design dimension.

[0035] Optionally, the evaluation element is an element obtained by three-coordinate measurement of the steering knuckle.

[0036] Optionally, the evaluation elements include hole elements and plane elements.

[0037] Optionally, the hole element refers to an actual element of the steering knuckle obtained by three-coordinate measurement, and the hole element includes a straight hole, a threaded hole, a tapered hole, a semicircular hole or a hole axis.

[0038] Optionally, the plane element is an actual plane of the steering knuckle obtained by three-coordinate measurement.

[0039] Optionally, the evaluation includes hole position accuracy and plane contour accuracy, and the hole position accuracy and plane contour accuracy are set with corresponding tolerance zones according to the processing design requirements of the steering knuckle.

[0040] Optionally, the evaluation includes an XYZ direction of a feature of an element processed by the machining center, and the XYZ direction is determined based on the evaluated feature of the element.

[0041] Optionally, the auxiliary evaluation coordinate system has the same name and position as the workpiece coordinate system of the corresponding machining center.

[0042] In a specific embodiment, a method for adjusting the machining dimensions of an automobile steering knuckle comprises the following steps: in a compiled three-coordinate measurement scheme, multiple three-coordinate auxiliary evaluation coordinate systems are established. The position and name of the auxiliary evaluation coordinate system are the same as the name and position of the workpiece coordinate system of the machining center. The elements of the steering knuckle machining are divided into two categories, namely, holes and planes. Three-coordinate evaluations of the machining elements of the steering knuckle are established, namely, hole position and plane contour. The hole position and plane contour should be set with corresponding tolerance zones according to the machining drawings of the steering knuckle.

[0043] The values ​​of rotation and translation are based on the dimensions shown in the processing drawing of the steering knuckle, plus the median data of the tolerance zone of the dimension.

[0044] Hole elements refer to the actual straight holes, threaded holes, tapered holes, semicircular holes, hole axes, etc. of the steering knuckle obtained by three-coordinate measurement. Plane elements refer to the actual planes of the steering knuckle obtained by three-coordinate measurement.

[0045] The three-coordinate evaluation basis for hole position and plane profile should be the coordinate system with the same name as the element processed by the machining center.

[0046] Hole position is used to evaluate hole elements, and plane profile is used to evaluate plane elements.

[0047] like Figure 1 and Figure 2 As shown, the automobile steering knuckle machining size adjustment method of the present invention is used to establish a three-coordinate measurement strategy for a part of the automobile steering knuckle, and intuitively converts the size position of the machined workpiece into the position coordinates of the workpiece coordinate system of the machining center, so as to quickly reflect the deviation value of the workpiece coordinate system of the machining center, so that the technicians can quickly and accurately modify the coordinates of the workpiece coordinate system of the machining center.

[0048] Figure 1 It is the basic coordinate system established for three-coordinate measurement of steering knuckle and is used for evaluating the size of steering knuckle. Figure 2 In order to rotate and translate the main coordinate system of the three-coordinate system to the position of the workpiece coordinate system when the machining center is machining a part of the steering knuckle, this includes the position of the coordinates and the direction of the XYZ axis of the coordinate system. The values ​​of translation and rotation are based on the machining drawing of the steering knuckle.

[0049] Table 1. Evaluation results of three coordinates

[0050]

[0051] The evaluation results are shown in Table 1, where PO_G532 and PO_PL_G532 are the names of the workpiece coordinate systems of the machining center, PO_G532 represents the position of the hole, PO_PL_G532 represents the contour of the plane, and the first row in the difference column represents the difference in the XY direction of the three-coordinate evaluation. The difference refers to the difference between the hole element of the knuckle at this processing location relative to the theoretical position of the knuckle. When this difference is smaller, the coordinates of the workpiece coordinate system of the machining center are more accurate. The second row in the difference column represents the difference in the Z direction of the three-coordinate evaluation. The difference refers to the difference between the plane element of the knuckle at this processing location relative to the theoretical position of the knuckle. When this difference is smaller, the coordinates of the workpiece coordinate system of the machining center are more accurate. Step 1: Establish an auxiliary coordinate system for three-coordinate evaluation. This coordinate system must be obtained by rotating and translating the basic coordinate system established by the three-coordinate, and the values ​​of the rotation and translation are derived from the machining drawings of the knuckle, and it is named the name of the workpiece coordinate system for machining the knuckle at this position by the machining center. Step 2: Establish the evaluation of the three coordinates at this position. The evaluation basis should select the auxiliary coordinate system of this position established by the three coordinates. The evaluation elements should select the same processing elements as the machining center. The processing elements should be hole elements and plane elements. Step 3: Three-coordinate measurement of the steering knuckle. After the measurement is completed, the measurement result will be formed. Step 4: Based on the results of the three-coordinate measurement, the technicians input the numerical deviation value of the three-coordinate evaluation with the coordinate system name of the machining center into the coordinate system of the machining center to complete the machining size adjustment of the steering knuckle.

[0052] In this embodiment, the basic coordinate system is translated and rotated to establish an auxiliary evaluation coordinate system according to the drawing size, and the position and direction are the same as the XYZ coordinate system of the machining center. The auxiliary evaluation coordinate system has the same name as the workpiece coordinate system established by the machine tool. The elements evaluated by the auxiliary evaluation coordinate system are the same as the elements processed by the machining center. The auxiliary evaluation coordinate system evaluates the XYZ direction of the processing element characteristics of the machining center, and the XYZ direction is determined according to the evaluation element characteristics. Based on the relative dimensions required by the drawing, the auxiliary evaluation coordinate system can be established by the reference elements required by the drawing and the elements obtained by measurement.

[0053] The automobile steering knuckle machining size adjustment method disclosed in this embodiment can accurately and quickly obtain the deviation value of the coordinate system set for machining the steering knuckle by the machining center, which can improve the efficiency of automobile steering knuckle size adjustment by 80% and greatly reduce the debugging cost.

[0054] The basic principle of the present invention is described above in conjunction with specific embodiments. However, it should be pointed out that the advantages, strengths, effects, etc. mentioned in the present invention are only examples and not limitations, and it cannot be considered that these advantages, strengths, effects, etc. must be possessed by each embodiment of the present invention. In addition, the specific details disclosed above are only for the purpose of illustration and facilitation of understanding, rather than limitation, and the above details do not limit the present invention to being implemented by adopting the above specific details.

[0055] In the present invention, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply that there is any such actual relationship or order between these entities or operations. The block diagrams of the devices, devices, equipment, and systems involved in the present invention are only illustrative examples and are not intended to require or imply that they must be connected, arranged, and configured in the manner shown in the block diagram. As will be appreciated by those skilled in the art, these devices, devices, equipment, and systems can be connected, arranged, and configured in any manner. Words such as "including", "comprising", "having", etc. are open words, referring to "including but not limited to", and can be used interchangeably with them. The words "or" and "and" used here refer to the words "and / or" and can be used interchangeably with them, unless the context clearly indicates otherwise. The words "such as" used here refer to the phrase "such as but not limited to", and can be used interchangeably with them.

[0056] Additionally, as used herein, "or" used in a list of items beginning with "at least one" indicates a separate list, so that, for example, a list of "at least one of A, B, or C" means A or B or C, or AB or AC or BC, or ABC (i.e., A and B and C). Furthermore, the word "exemplary" does not mean that the example described is preferred or better than other examples.

[0057] It should also be noted that in the system and method of the present invention, each component or each step can be decomposed and / or recombined. Such decomposition and / or recombination should be regarded as equivalent solutions of the present invention.

[0058] Various changes, substitutions, and modifications of the techniques described herein may be made without departing from the teachings defined by the appended claims. Furthermore, the scope of the claims of the present invention is not limited to the specific aspects of the processes, machines, manufactures, compositions of events, means, methods, and actions described above. Currently existing or later to be developed processes, machines, manufactures, compositions of events, means, methods, or actions that perform substantially the same functions or achieve substantially the same results as the corresponding aspects described herein may be utilized. Thus, the appended claims include such processes, machines, manufactures, compositions of events, means, methods, or actions within their scope.

[0059] The above description of the disclosed aspects is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these aspects will be readily apparent to those skilled in the art, and the general principles defined herein may be applied to other aspects without departing from the scope of the present invention. Therefore, the present invention is not intended to be limited to the aspects shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

[0060] The above description has been given for the purpose of illustration and description. In addition, this description is not intended to limit the embodiments of the present invention to the forms disclosed herein. Although a number of example aspects and embodiments have been discussed above, those skilled in the art will recognize certain variations, modifications, changes, additions and sub-combinations thereof.

Claims

1. A method for adjusting the machining size of an automobile steering knuckle, characterized in that: include: Establish multiple auxiliary evaluation coordinate systems based on the basic coordinate system of the three coordinates of the automobile steering knuckle machining, and the auxiliary evaluation coordinate systems correspond one-to-one to the workpiece coordinate system of the machining center; Establish the evaluation of the position of the basic coordinate system of the three-coordinate system in the auxiliary evaluation coordinate system, and the evaluation elements are the same processing elements as those of the machining center; Use a three-coordinate machine to measure the steering knuckle and obtain the measurement results; The knuckle is machined and dimensioned based on the measurement results and evaluation.

2. The method for adjusting the size of a vehicle steering knuckle during machining according to claim 1, characterized in that: The auxiliary evaluation coordinate system is obtained by rotating and / or translating the basic coordinate system of the three coordinates.

3. The method for adjusting the size of a vehicle steering knuckle during machining according to claim 2, characterized in that: The rotational and / or translational values ​​are obtained based on the processing design dimensions of the steering knuckle and the median value of the tolerance range of the design dimensions.

4. The method for adjusting the size of a vehicle steering knuckle during machining according to claim 1, characterized in that: The evaluation elements are elements obtained by three-coordinate measurement of the steering knuckle.

5. The method for adjusting the size of a vehicle steering knuckle during machining according to claim 4, characterized in that: The evaluation elements include hole elements and plane elements.

6. The method for adjusting the size of a vehicle steering knuckle during machining according to claim 5, characterized in that: The hole element refers to the actual element of the steering knuckle obtained by three-dimensional coordinate measurement, and the hole element includes a straight hole, a threaded hole, a tapered hole, a semicircular hole or a hole axis.

7. The method for adjusting the size of a vehicle steering knuckle during machining according to claim 5, characterized in that: The plane element is the actual plane of the steering knuckle obtained by three-coordinate measurement.

8. The method for adjusting the size of a vehicle steering knuckle during machining according to claim 5, characterized in that: The evaluation includes hole position accuracy and plane profile accuracy, and the hole position accuracy and plane profile accuracy are set with corresponding tolerance zones according to the processing design requirements of the steering knuckle.

9. The method for adjusting the size of a vehicle steering knuckle during machining according to claim 5, characterized in that: The evaluation includes the XYZ direction of the machining element feature of the machining center, and the XYZ direction is determined based on the evaluation element feature.

10. The method for adjusting the size of a vehicle steering knuckle during machining according to claim 1, characterized in that: The auxiliary evaluation coordinate system has the same name and position as the workpiece coordinate system of the corresponding machining center.

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