A machining compensation method of a multi-spindle machining device and a multi-spindle machining device

Abstract

This application discloses a machining compensation method and a multi-spindle machining equipment. Each spindle is configured with its own dedicated compensation parameters. These parameters are determined based on dimensional deviations generated after the spindle and tool perform trial machining operations. Therefore, the dedicated compensation parameters match the inherent deviations of the spindle itself, accurately reflecting the comprehensive impact of these inherent deviations. This allows for precise correction of individual deviations in different spindles, preventing varying degrees of tool position shifts due to spindle variations. This effectively improves the consistency of machining results in batch production, significantly increasing the yield rate of mass production.

Description

Technical Field

[0001] This application belongs to the field of PCB processing technology, specifically relating to a processing compensation method for multi-spindle processing equipment and the multi-spindle processing equipment itself. Background Technology

[0002] Currently, multi-spindle machining centers, with their advantage of simultaneous multi-station processing, are widely used in batch cutting and milling operations of PCBs, effectively improving the production efficiency of PCB products. However, in actual production, each spindle of a multi-spindle machining center will have inherent individual deviations due to manufacturing tolerances of components, assembly deviations, and tool clamping deviations. These individual deviations are irreversible systemic deviations, causing varying degrees of positioning accuracy deviations, resulting in different degrees of offset in the actual machining position of the tool on each spindle under the same machining program. For example, due to spindle concentricity deviations, the tool mounted on the spindle will produce radial runout. Even if different spindles are equipped with the same specification tool, each tool will produce different degrees of radial runout, resulting in different degrees of positioning deviations, which in turn lead to different degrees of dimensional deviations in the machined parts of the finished product.

[0003] However, existing machining compensation mechanisms only adopt a global uniform compensation strategy for the tool itself. That is, they only set uniform compensation parameters for the tool itself and assume that the overall deviation of all spindles is consistent. They cannot distinguish and correct the inherent individual deviations of each spindle. As a result, for products machined by tools mounted on spindles with large inherent individual deviations, the contour dimensions of the machined parts exceed the tolerance range. For products machined by tools mounted on spindles with small inherent individual deviations, the contour dimensions of the machined parts are within the tolerance range. This ultimately leads to poor consistency of the machining results of batch products and seriously reduces the yield of mass production. Summary of the Invention

[0004] This application provides a machining compensation method and a multi-spindle machining equipment, aiming to overcome the technical problem of poor consistency of machining results of products obtained from batch processing, which seriously reduces the yield of batch production.

[0005] This application provides a machining compensation method for a multi-spindle machining equipment, including:

[0006] Configure dedicated compensation parameters for each spindle individually;

[0007] Each of the spindles, equipped with a cutting tool, independently performs trial machining operations, measuring and obtaining the dimensional deviation between the actual contour and the theoretical contour of the machined part after the trial machining is completed;

[0008] The specific compensation parameter is assigned a value based on the dimensional deviation;

[0009] During the formal machining stage, position compensation is performed on each of the spindles, and the spindles perform position compensation according to the exclusive compensation parameters matched with them.

[0010] In some embodiments, the actual effective radius of the tool during the trial machining process is calculated based on the dimensional deviation, and the dedicated compensation parameter is assigned a value accordingly.

[0011] In some embodiments, the formula for calculating the true effective radius is:

[0012] ;

[0013] in, The nominal radius of the cutting tool is given. This is the radius correction amount. Obtained based on the stated dimensional deviation.

[0014] In some embodiments, a left compensation procedure or a right compensation procedure is used to perform position compensation on the spindle.

[0015] In some embodiments, if the left compensation procedure is used to perform position compensation on the spindle:

[0016] When the actual contour is smaller than the theoretical contour, the formula for calculating the radius correction is:

[0017] , The width of the deviation region between the actual contour and the theoretical contour;

[0018] When the actual profile is larger than the theoretical profile, the formula for calculating the radius correction is:

[0019] .

[0020] In some embodiments, if the right compensation procedure is used to perform position compensation on the spindle:

[0021] When the actual profile is larger than the theoretical profile, the formula for calculating the radius correction is:

[0022] , The width of the deviation region between the actual contour and the theoretical contour;

[0023] When the actual contour is smaller than the theoretical contour, the formula for calculating the radius correction is:

[0024] .

[0025] In some embodiments, a data register unit is individually bound to each spindle in the control system of the multi-spindle machining equipment;

[0026] The actual effective radius corresponding to each of the main axes is entered into the data storage unit that matches it;

[0027] For any of the spindles, the control system calls the data information in the matching data register unit to perform position compensation.

[0028] In some embodiments, during the formal processing stage, a trial production operation is first performed, and the consistency of the processing results of the trial production products is tested.

[0029] If the test results are satisfactory, mass production will proceed.

[0030] If the test results are unsatisfactory, the specific compensation parameters are adjusted, and the trial production operation is performed again.

[0031] In some embodiments, if the multi-spindle machining equipment experiences anomalies during the mass production process, the dedicated compensation parameters are recalibrated.

[0032] In some embodiments, during the mass production process, the processed products are sampled for inspection.

[0033] If the test results are satisfactory, the mass production process will continue.

[0034] If the test results are unsatisfactory, the specific compensation parameters shall be recalibrated.

[0035] In some embodiments, all spindles perform the trial machining operation under uniform reference conditions.

[0036] This application also provides a multi-spindle machining equipment, which uses the machining compensation method for multi-spindle machining equipment as described above for machining compensation.

[0037] The beneficial effects of this application are:

[0038] This application configures dedicated compensation parameters for each spindle individually. These parameters are determined based on dimensional deviations generated after the spindle and tool perform trial machining operations. Therefore, the dedicated compensation parameters match the inherent deviations of the spindle itself, accurately reflecting the comprehensive impact of these inherent deviations. Consequently, this application can precisely correct individual deviations of different spindles, preventing varying degrees of tool position offset due to spindle variations. This effectively improves the consistency of machining results in batch production, significantly increasing the yield rate of mass production.

[0039] The multi-spindle machining equipment in this application performs personalized position correction by matching exclusive compensation parameters for each spindle, thereby offsetting the adverse effects of the inherent individual deviations of each spindle on the tool machining position. As a result, in the process of synchronous batch machining of multiple spindles, it can effectively improve the consistency of the machining results of all spindles and thus significantly improve the yield of mass production. Attached Figure Description

[0040] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0041] Figure 1 A flowchart illustrating the machining compensation method for a multi-spindle machining equipment provided in this application embodiment;

[0042] Figure 2 This is a schematic diagram illustrating that the actual contour of the processed part of the product is smaller than the theoretical contour after processing in Embodiment 1 of this application. Figure 1 ;

[0043] Figure 3 This is a schematic diagram showing that the actual contour of the processed part of the product is larger than the theoretical contour after processing in Embodiment 1 of this application;

[0044] Figure 4 This is a schematic diagram illustrating that the actual contour of the processed part of the product is smaller than the theoretical contour after processing in Embodiment 1 of this application. Figure 2 ;

[0045] Figure 5 This is a schematic diagram illustrating that the actual contour of the processed part of the product is larger than the theoretical contour after processing in Embodiment 2 of this application. Figure 1 ;

[0046] Figure 6 This is a schematic diagram showing that the actual contour of the processed part of the product is smaller than the theoretical contour after processing in Embodiment 2 of this application;

[0047] Figure 7 This is a schematic diagram illustrating that the actual contour of the processed part of the product is larger than the theoretical contour after processing in Embodiment 2 of this application. Figure 2 . Detailed Implementation

[0048] Various exemplary embodiments of the present application will now be described in detail with reference to the accompanying drawings. It should be noted that, unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps set forth in these embodiments do not limit the scope of the present application.

[0049] The following description of at least one exemplary embodiment is for illustrative purposes only and is not intended to limit the scope, application, or use of this application. Techniques, methods, and devices known to those skilled in the art should be considered part of the specification where appropriate and will not be discussed further here. The same or similar reference numerals in the drawings represent the same or similar elements, and therefore, once an element is defined in one drawing, it need not be repeated in subsequent drawings.

[0050] In this document, directional terms such as "upper," "lower," "front," "rear," "left," and "right" are used only to describe the relative positional relationships between the components shown in the accompanying drawings, and not to define their absolute positions. Terms such as "first" and "second" are used only to distinguish different components and do not indicate importance, order, or interdependence. Furthermore, expressions such as "equal," "same," "aligned," "aligned," "flush," "axial direction," "horizontal direction," "above," "below," "consistent," "synchronous," "simultaneously," "in sequence," "axis," and "center" are not strict mathematical or geometric definitions, but rather allow for a reasonable range of error acceptable to those skilled in the art during manufacturing or use.

[0051] Example 1

[0052] This embodiment provides a multi-spindle machining equipment, which includes multiple spindles. Taking a multi-spindle machining equipment with six spindles as an example, each of the six spindles can be equipped with a cutting tool to perform machining operations on the product. This allows six products to be processed simultaneously, thereby improving production efficiency.

[0053] Of course, in other alternative embodiments, the multi-spindle machining equipment may also include other numbers of spindles, and this embodiment does not impose specific limitations on this.

[0054] Based on the above, each spindle will have different inherent individual deviations due to manufacturing tolerances of parts, assembly deviations, and tool clamping deviations. This will cause different degrees of positioning accuracy deviations, resulting in different degrees of deviation in the actual machining position of the tool under the same machining program for each spindle.

[0055] Taking a multi-spindle machining center used for cutting the outer contour of a product as an example, due to the inherent individual deviations of each spindle, even if all spindles are equipped with tools of the same specification, the actual machining position of each tool will deviate to varying degrees during machining operations. This results in different deviations between the actual machining path and the theoretical machining path, leading to different dimensional deviations in the products produced in batches. For example, due to the individual deviations of the spindles, the actual machining position of the tool mounted on the spindle may shift towards the side closer to the center of the product. This causes the actual machining path of the tool to shift towards the side closer to the center of the product, resulting in a smaller size of the machined product compared to the theoretical size.

[0056] To overcome the above problems, please refer to Figure 1 In this embodiment, the multi-spindle machining equipment uses the following machining compensation method for machining compensation.

[0057] Specifically, processing compensation methods include:

[0058] Configure dedicated compensation parameters for each spindle individually;

[0059] Each spindle, equipped with a tool, independently performs trial machining operations, measuring and obtaining the dimensional deviation between the actual contour and the theoretical contour of the machined part after the trial machining is completed;

[0060] Assign values ​​to specific compensation parameters based on dimensional deviations;

[0061] During the formal machining stage, position compensation is performed on each spindle, which executes position compensation according to its matching exclusive compensation parameters.

[0062] Based on the above, this embodiment configures dedicated compensation parameters for each spindle individually. These parameters are determined by analyzing the dimensional deviations generated after the spindle and tool perform trial machining operations. Therefore, the dedicated compensation parameters match the inherent deviations of the spindle itself, accurately reflecting the comprehensive impact of these inherent deviations. Thus, this embodiment can precisely correct individual deviations of different spindles, preventing varying degrees of tool position shifts due to spindle variations. This effectively improves the consistency of machining results in batch production, significantly increasing the yield rate of mass production.

[0063] Correspondingly, multi-spindle machining equipment that uses the above-mentioned machining compensation method performs personalized position correction through exclusive compensation parameters matched to each spindle. This can offset the adverse effects of the inherent individual deviations of each spindle on the tool machining position. Thus, in the process of synchronous batch machining of multiple spindles, the consistency of the machining results of all spindles can be effectively improved, thereby significantly improving the yield of batch production.

[0064] Specifically, this embodiment configures a dedicated compensation parameter for each spindle and independently performs trial machining operations with tools on each spindle to obtain the dimensional deviations caused by its own individual variations. Based on this, a corresponding dedicated compensation parameter is assigned, thus differentiating the dedicated compensation parameters for each spindle. This ensures that each spindle is equipped with dedicated compensation parameters that match its own individual variations. Therefore, during formal machining, each spindle can perform positional corrections according to its corresponding dedicated compensation parameters, effectively offsetting the inherent individual variations of each spindle and preventing varying degrees of dimensional deviations in the machined parts of the batch-processed products. Through this compensation, this embodiment effectively improves the consistency of the machining results of batch-processed products, thereby significantly increasing the yield of mass production.

[0065] It is worth noting that in this embodiment, all spindles perform trial machining operations under uniform reference conditions. For example, all spindles perform trial machining operations under the conditions of being equipped with the same specification tools, using the same machining program, and the same speed feed, thereby ensuring that the measured dimensional deviations only come from individual spindle deviations, so as to avoid interference from other machining condition differences, thereby improving the accuracy of machining compensation.

[0066] As stated above, assigning values ​​to the specific compensation parameters based on dimensional deviations includes:

[0067] The true effective radius of the cutting tool during the trial machining operation is calculated based on the dimensional deviation, and values ​​are assigned to the dedicated compensation parameters accordingly. The true effective radius is the radial distance between the center point of the cutting tool along the theoretical machining path and the actual contour of the machined part of the product obtained from the trial machining.

[0068] Based on the above, this embodiment employs a radius compensation mechanism to perform machining compensation, thereby compensating for the inherent individual deviations of each spindle. Specifically, this embodiment calculates the true effective radius of the tool mounted on each spindle and assigns values ​​to the corresponding dedicated compensation parameters accordingly, thus replacing the nominal radius of the tool with the true effective radius. This embodiment relies on the radius compensation mechanism to convert the individual deviations of the spindle into the tool radius dimension, thereby performing position compensation on the corresponding spindle according to each dedicated compensation parameter. This ensures that the actual contour of the machined part of the product remains consistent with the theoretical contour, thereby improving the consistency of the machining results of batch-processed products and significantly increasing the yield of mass production.

[0069] Of course, other optional embodiments may also use other methods to assign values ​​to the exclusive compensation parameters based on the dimensional deviation. For example, the offset of the machining origin can be calculated based on the dimensional deviation, thereby converting the individual deviation of the spindle to the offset of the machining origin. Then, different origin offset correction parameters are set for each spindle, and the exclusive compensation parameters are assigned accordingly. In the subsequent formal machining stage, the position of the machining origin can be directly corrected, thereby achieving the purpose of machining compensation. This embodiment does not impose specific limitations on this.

[0070] Based on the above, in this embodiment, the formula for calculating the true effective radius is:

[0071] ;

[0072] in, The nominal radius of the cutting tool. This is the radius correction amount. Obtained based on dimensional deviations.

[0073] Therefore, this embodiment calculates the true effective radius by superimposing the nominal radius of the tool with the radius correction amount. The calculation method is simple and intuitive, and can accurately reflect the influence of individual spindle deviations on the tool machining position.

[0074] Based on the above, this embodiment takes a multi-spindle machining equipment for cutting the outer contour of a product as an example. Based on the radius compensation mechanism, this embodiment uses a left compensation program (G41) to perform position compensation on the spindle. This allows for the correction of the tool's machining position by combining the actual effective radius of the tool corresponding to each spindle, thereby correcting the outer contour of the machined product and effectively improving the consistency of the machining results of batch-processed products.

[0075] However, given the varying deviations between the actual and theoretical contours of different products obtained after trial machining with different spindles and tools, the corresponding radius correction amounts also differ. Specifically, according to the radius compensation mechanism, when the actual contour is smaller than the theoretical contour, it indicates that the overall outer contour of the machined product is too small. The corresponding radius correction amount should be positive, meaning the actual effective radius is greater than the nominal radius. This causes the tool to shift outward during subsequent formal machining, thus correcting the tool's machining position and ensuring the machined outer contour dimensions meet the theoretical requirements. Conversely, when the actual contour is larger than the theoretical contour, it indicates that the overall outer contour of the machined product is too large. The corresponding radius correction amount should be negative, meaning the actual effective radius is less than the nominal radius. This causes the tool to shift inward during subsequent formal machining, thus correcting the tool's machining position and ensuring the machined outer contour dimensions meet the theoretical requirements.

[0076] Based on the above, in this embodiment, when the actual contour is smaller than the theoretical contour, the formula for calculating the radius correction is as follows:

[0077] , This represents the width of the deviation region between the actual profile and the theoretical profile.

[0078] Accordingly, when the actual profile is larger than the theoretical profile, the formula for calculating the radius correction is:

[0079] .

[0080] It is worth noting that the deviation area between the actual contour and the theoretical contour is a square circle or annulus, etc. Therefore, in this embodiment, the radius correction amount can be obtained by measuring and calculating the width of the deviation area between the actual contour and the theoretical contour.

[0081] Specifically, It is half the difference between the length of the actual profile and the length of the theoretical profile, or half the difference between the width of the actual profile and the width of the theoretical profile, or half the difference between the diameter of the actual profile and the diameter of the theoretical profile, or the difference between the radius of the actual profile and the radius of the theoretical profile.

[0082] After the trial machining operation is completed, workers or specialized measuring equipment measure the length, width, or diameter of the resulting product and compare the measurement result with the length, width, or diameter of the theoretical profile to calculate the dimensional deviation between the actual and theoretical profiles. Dividing the calculated result by two gives the width of the deviation area between the actual and theoretical profiles, thus obtaining the radius correction amount. Adding this to the nominal radius of the cutting tool yields the true effective radius. Alternatively, after the trial machining operation is completed, workers or specialized measuring equipment measure the radius of the resulting product and compare the measurement result with the radius of the theoretical profile to calculate the dimensional deviation between the actual and theoretical profiles. This gives the width of the deviation area between the actual and theoretical profiles, which in turn gives the radius correction amount. Adding this to the nominal radius of the cutting tool yields the true effective radius.

[0083] Based on the above, taking a square product as an example, and using a multi-spindle machining center to cut the outer contour of the product, due to individual spindle deviations, when the tool moves with the spindle to the machining origin, the spindle's positioning deviates. This causes the tool's machining position to shift towards the side closer to the product's center, resulting in the finished product being smaller than its theoretical size. For example... Figure 2 As shown in the figure, the solid-lined box represents the actual outline of the product after trial processing, and the dashed-lined box represents the theoretical outline of the product after processing. The deviation area between the actual outline and the theoretical outline is represented by a square circle. The width of the square circle is defined as half the difference between the actual length of the outline and the theoretical length, or half the difference between the actual width of the outline and the theoretical width.

[0084] Based on the above, combined with Figure 2 The radius correction is taken as a positive value, representing the true effective radius of the tool. The nominal radius of the cutting tool Width of the square circle The sum is used to assign values ​​to the corresponding dedicated compensation parameters. After the machining compensation is performed using the left compensation program, it is equivalent to the tool being offset additionally outward from the product. This ensures that the actual contour of the processed product coincides with the theoretical contour, thereby offsetting the dimensional deviation caused by individual spindle deviations and achieving precise position compensation.

[0085] Similarly, if the cutting tool is positioned away from the center of the product, the resulting product will be larger than its theoretical size. For example... Figure 3 As shown in the figure, the solid-lined box represents the actual outline of the product after trial processing, and the dashed-lined box represents the theoretical outline of the product after processing. The deviation area between the actual outline and the theoretical outline is represented by a square circle. The width of the square circle is defined as half the difference between the actual length of the outline and the theoretical length, or half the difference between the actual width of the outline and the theoretical width.

[0086] Based on the above, combined with Figure 3 The radius correction is taken as a negative value, representing the true effective radius of the tool. The nominal radius of the cutting tool Width of the square circle The difference is used to assign values ​​to the corresponding dedicated compensation parameters. After the machining compensation is performed using the left compensation program, it is equivalent to shifting the tool inward towards the product. This ensures that the actual contour of the processed product coincides with the theoretical contour, thereby offsetting the dimensional deviation caused by individual spindle deviations and achieving precise position compensation.

[0087] Furthermore, if radial runout of the tool occurs due to individual spindle deviations, the actual effective radius of the tool during machining will inevitably be larger than the theoretical size, resulting in a smaller finished product compared to its theoretical size. For example... Figure 4 As shown, the spindle is accurately positioned, but the tool exhibits radial runout. The solid box in the figure represents the actual contour of the product after trial machining, while the dashed box represents the theoretical contour of the product after machining. The deviation area between the actual and theoretical contours is represented by square circles. The width of the square circle is defined as half the difference between the actual length of the outline and the theoretical length, or half the difference between the actual width of the outline and the theoretical width.

[0088] Based on the above, combined with Figure 4 The radius correction is taken as a positive value, representing the true effective radius of the tool. The nominal radius of the cutting tool Width of the square circle The sum is used to assign values ​​to the corresponding dedicated compensation parameters. After the machining compensation is performed using the left compensation program, it is equivalent to the tool being offset additionally outward from the product. This ensures that the actual contour of the processed product coincides with the theoretical contour, thereby offsetting the dimensional deviation caused by individual spindle deviations and achieving precise position compensation.

[0089] Of course, in other alternative embodiments, the products processed by the multi-spindle machining equipment can also be circular, and correspondingly, the deviation area between the actual contour and the theoretical contour is an annular region. The width of the annulus is specifically half the difference between the diameter of the actual contour and the diameter of the theoretical contour, or the difference between the radius of the actual contour and the radius of the theoretical contour. This embodiment does not impose specific limitations on this.

[0090] Understandably, each spindle of a multi-spindle machining equipment is equipped with an X-axis moving module for driving its movement along the X-axis direction and a Y-axis moving module for driving its movement along the Y-axis direction. During the actual machining phase, the X-axis moving module and / or the Y-axis moving module can specifically drive the spindle movement according to the corresponding dedicated compensation parameters, thereby performing position compensation.

[0091] Furthermore, in this embodiment, configuring dedicated compensation parameters for each spindle individually includes:

[0092] In the control system of a multi-spindle machining equipment, a separate data register unit is bound to each spindle.

[0093] Accordingly, assigning values ​​to specific compensation parameters based on dimensional deviations also includes:

[0094] The actual effective radius corresponding to each spindle is entered into the data storage unit that matches it.

[0095] Accordingly, position compensation is performed on each spindle separately, including:

[0096] For any spindle, the control system calls the data information in the matching data register unit to perform position compensation.

[0097] As described above, each data register unit is used to store the exclusive compensation parameters of the corresponding spindle. Thus, the control system can retrieve the exclusive compensation parameters in the corresponding register unit to complete the position correction of the corresponding spindle, thereby preventing the problem of confusion and disorder of the exclusive compensation parameters of different spindles.

[0098] For example, the control system configures a separate data register for each spindle. After the trial machining operation is completed, the dedicated compensation parameters can be entered into the control system by the operator and stored in the corresponding data register. Of course, in other optional embodiments, the control system can also automatically calculate the dedicated compensation parameters for the corresponding spindle based on the measurement data uploaded by the measuring equipment and automatically assign and store the values ​​without manual intervention, thereby improving the automation level of dedicated compensation parameter configuration. This embodiment does not impose specific limitations on this.

[0099] As mentioned above, multi-spindle machining equipment also includes a control system. The control system can perform position compensation on each spindle according to the exclusive compensation parameters corresponding to each spindle, thereby eliminating the machining dimension deviation caused by individual spindle deviations, improving the consistency of the machining results of the processed products, and thus significantly improving the yield of mass production.

[0100] For further information, please refer to [link / reference]. Figure 1It is worth noting that in the formal processing stage, a trial production operation is first performed, and the consistency of the processing results of the trial production products is tested. If the test results are qualified, mass production is carried out; if the test results are unqualified, the dedicated compensation parameters are adjusted, and the trial production operation is performed again. This allows for further verification of the compensation effect before formal mass production, and secondary correction of the dedicated compensation parameters when the effect is unqualified, thereby better ensuring the yield of mass production.

[0101] Furthermore, during mass production operations, if any abnormality occurs in the multi-spindle machining equipment, the dedicated compensation parameters must be recalibrated. Specifically, abnormalities in multi-spindle machining equipment include situations that may cause individual spindle deviations, such as tool replacement, spindle disassembly and assembly, and restarting after maintenance. Recalibration can eliminate secondary deviations caused by these abnormalities, thereby ensuring consistency in subsequent processing.

[0102] Furthermore, in this embodiment, during the mass production process, the processed products are randomly inspected. If the inspection results are qualified, the mass production process continues; if the inspection results are unqualified, the dedicated compensation parameters are recalibrated. This allows for regular control of processing accuracy during mass production, timely detection and correction of deviations, and continuous assurance of consistency in the processing results of batch-processed products, thereby further improving the yield of mass production.

[0103] Example 2

[0104] Compared to Embodiment 1, the difference in this embodiment is that the multi-spindle machining equipment is used to cut the inner contour of the product, such as cutting the contour of the hole on the product.

[0105] Based on the radius compensation mechanism, this embodiment uses the right compensation program (G42) to perform position compensation on the spindle. This allows the machining position of the tool to be corrected by combining the actual effective radius of the tool corresponding to each spindle, thereby correcting the inner contour of the machined product and effectively improving the consistency of the machining results of the batch-processed products.

[0106] However, given the varying deviations between the actual and theoretical contours of different products obtained after trial machining with different spindles and tools, the corresponding radius correction amounts also differ. Specifically, according to the radius compensation mechanism, when the actual contour is smaller than the theoretical contour, it indicates that the overall inner contour of the machined product is too small. The corresponding radius correction amount should be negative, meaning the actual effective radius is smaller than the nominal radius. This causes the tool to shift outwards during subsequent formal machining, thus correcting the tool's machining position and ensuring the machined inner contour dimensions meet the theoretical requirements. Conversely, when the actual contour is larger than the theoretical contour, it indicates that the overall inner contour of the machined product is too large. The corresponding radius correction amount should be positive, meaning the actual effective radius is larger than the nominal radius. This causes the tool to shift inwards during subsequent formal machining, thus correcting the tool's machining position and ensuring the machined inner contour dimensions meet the theoretical requirements.

[0107] Based on the above, in this embodiment, when the actual contour is larger than the theoretical contour, the formula for calculating the radius correction is as follows:

[0108] , This represents the width of the deviation region between the actual profile and the theoretical profile.

[0109] Accordingly, when the actual profile is smaller than the theoretical profile, the formula for calculating the radius correction is:

[0110] .

[0111] It is worth noting that the deviation area between the actual contour and the theoretical contour is a square circle or annulus, etc. Therefore, in this embodiment, the radius correction amount can be obtained by measuring and calculating the width of the deviation area between the actual contour and the theoretical contour.

[0112] Specifically, It is half the difference between the length of the actual profile and the length of the theoretical profile, or half the difference between the width of the actual profile and the width of the theoretical profile, or half the difference between the diameter of the actual profile and the diameter of the theoretical profile, or the difference between the radius of the actual profile and the radius of the theoretical profile.

[0113] After the trial machining operation is completed, workers or specialized measuring equipment measure the length, width, or diameter of the machined part and compare the measurement results with the length, width, or diameter of the theoretical contour to calculate the dimensional deviation between the actual and theoretical contours. Dividing the calculated result by two gives the width of the deviation area between the actual and theoretical contours, thus obtaining the radius correction amount. Adding this to the nominal radius of the cutting tool yields the true effective radius. Alternatively, after the trial machining operation is completed, workers or specialized measuring equipment measure the radius of the machined part and compare the measurement results with the radius of the theoretical contour to calculate the dimensional deviation between the actual and theoretical contours. This gives the width of the deviation area between the actual and theoretical contours, which in turn gives the radius correction amount. Adding this to the nominal radius of the cutting tool yields the true effective radius.

[0114] Based on the above, let's take a multi-spindle machining center used for cutting the contours of holes on a product as an example. Due to individual spindle deviations, when the tool moves with the spindle to the machining origin, the spindle's positioning deviates, causing the tool's machining position to shift away from the product's center. This results in the inner contour of the machined product being larger than the theoretical size. For example... Figure 5 As shown in the figure, the two larger circles represent the outline of the hole, while the two smaller circles represent the cutting tool. The solid lines in the figure represent the actual outline of the hole on the product after trial machining, while the dashed lines represent the theoretical outline of the hole on the product after machining. The deviation area between the actual and theoretical outlines is represented by an annulus. The width of the annulus is defined as half the difference between the diameter of the actual profile and the diameter of the theoretical profile, or the difference between the radius of the actual profile and the radius of the theoretical profile.

[0115] Based on the above, combined with Figure 5 The radius correction is taken as a positive value, representing the true effective radius of the tool. The nominal radius of the cutting tool With the width of the ring The sum is used to assign values ​​to the corresponding dedicated compensation parameters. After the right compensation program is used to perform machining compensation, it is equivalent to the tool being offset additionally towards the inside of the product. This ensures that the actual contour of the hole in the processed product coincides with the theoretical contour, thereby offsetting the dimensional deviation caused by individual spindle deviations and achieving precise position compensation.

[0116] Similarly, if the cutting tool is offset towards the side closer to the center of the product, the resulting product will be smaller than its theoretical size. For example... Figure 6As shown in the figure, the two larger circles represent the outline of the hole, while the two smaller circles represent the cutting tool. The solid lines in the figure represent the actual outline of the hole on the product after trial machining, while the dashed lines represent the theoretical outline of the hole on the product after machining. The deviation area between the actual and theoretical outlines is represented by an annulus. The width of the annulus is defined as half the difference between the diameter of the actual profile and the diameter of the theoretical profile, or the difference between the radius of the actual profile and the radius of the theoretical profile.

[0117] Based on the above, combined with Figure 6 The radius correction is taken as a negative value, representing the true effective radius of the tool. The nominal radius of the cutting tool With the width of the ring The difference is used to assign corresponding exclusive compensation parameters. After the right compensation program is used to perform machining compensation, it is equivalent to shifting the tool outwards from the product. This ensures that the actual contour of the processed product coincides with the theoretical contour, thereby offsetting the dimensional deviation caused by individual spindle deviations and achieving precise position compensation.

[0118] Furthermore, if radial runout of the tool occurs due to individual spindle deviations, the actual effective radius of the tool during machining will inevitably be larger than the theoretical size, resulting in larger hole dimensions on the machined product compared to the theoretical dimensions. For example... Figure 7 As shown, the spindle is accurately positioned, but the tool exhibits radial runout. The two larger circles in the figure represent the hole outline, while the two smaller circles represent the tool. The solid lines in the figure represent the actual hole outline on the product after trial machining, while the dashed lines represent the theoretical hole outline on the product after machining. The deviation area between the actual and theoretical outlines is represented by a ring. The width of the annulus is defined as half the difference between the diameter of the actual profile and the diameter of the theoretical profile, or the difference between the radius of the actual profile and the radius of the theoretical profile.

[0119] Based on the above, combined with Figure 7 The radius correction is taken as a positive value, representing the true effective radius of the tool. The nominal radius of the cutting tool With the width of the ring The sum is used to assign values ​​to the corresponding dedicated compensation parameters. After the right compensation program is used to perform machining compensation, it is equivalent to the tool being offset additionally towards the inside of the product. This ensures that the actual contour of the processed product coincides with the theoretical contour, thereby offsetting the dimensional deviation caused by individual spindle deviations and achieving precise position compensation.

[0120] Of course, in other alternative embodiments, the inner contour of the product processed by the multi-spindle machining equipment can also be square. Accordingly, the deviation area between the actual contour and the theoretical contour is a square circle. The width of the square circle is specifically half the difference between the length of the actual contour and the length of the theoretical contour, or half the difference between the width of the actual contour and the width of the theoretical contour. This embodiment does not impose specific limitations on this.

[0121] Obviously, the above embodiments of this application are merely examples for clear illustration and are not intended to limit the implementation of this application. Those skilled in the art can make various obvious changes, readjustments, and substitutions without departing from the scope of protection of this application. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the scope of protection of the claims of this application.

Claims

1. A machining compensation method for a multi-spindle machining equipment, characterized in that, include: Configure dedicated compensation parameters for each spindle individually; Each of the spindles, equipped with a cutting tool, independently performs trial machining operations, measuring and obtaining the dimensional deviation between the actual contour and the theoretical contour of the machined part after the trial machining is completed; The specific compensation parameter is assigned a value based on the dimensional deviation; During the formal machining stage, position compensation is performed on each of the spindles, and the spindles perform position compensation according to the exclusive compensation parameters matched with them.

2. The machining compensation method for a multi-spindle machining equipment according to claim 1, characterized in that, The actual effective radius of the cutting tool during the trial machining operation is calculated based on the dimensional deviation, and the specific compensation parameter is assigned a value accordingly.

3. The machining compensation method for a multi-spindle machining equipment according to claim 2, characterized in that, The formula for calculating the true effective radius is: ； in, The nominal radius of the cutting tool is given. This is the radius correction amount. Obtained based on the stated dimensional deviation.

4. The machining compensation method for a multi-spindle machining equipment according to claim 3, characterized in that, The spindle is position compensated using either a left compensation procedure or a right compensation procedure.

5. The machining compensation method for a multi-spindle machining equipment according to claim 4, characterized in that, If the left compensation procedure is used to perform position compensation on the spindle: When the actual profile is smaller than the theoretical profile, the formula for calculating the radius correction is: , The width of the deviation region between the actual contour and the theoretical contour; When the actual profile is larger than the theoretical profile, the formula for calculating the radius correction is: 。 6. The machining compensation method for a multi-spindle machining equipment according to claim 4, characterized in that, If the right compensation procedure is used to perform position compensation on the spindle: When the actual profile is larger than the theoretical profile, the formula for calculating the radius correction is: , The width of the deviation region between the actual contour and the theoretical contour; When the actual profile is smaller than the theoretical profile, the formula for calculating the radius correction is: 。 7. The machining compensation method for a multi-spindle machining equipment according to claim 2, characterized in that, In the control system of the multi-spindle machining equipment, a data register unit is individually bound to each spindle; The actual effective radius corresponding to each of the main axes is entered into the data storage unit that matches it; For any of the spindles, the control system calls the data information in the matching data register unit to perform position compensation.

8. The machining compensation method for a multi-spindle machining equipment according to claim 1, characterized in that, In the formal processing stage, trial production is carried out first, and the consistency of the processing results of the trial production products is tested. If the test results are satisfactory, mass production will proceed. If the test results are unsatisfactory, the specific compensation parameters are adjusted, and the trial production operation is performed again.

9. The machining compensation method for a multi-spindle machining equipment according to claim 8, characterized in that, If the multi-spindle machining equipment experiences abnormal movement during the mass production process, the dedicated compensation parameters will be recalibrated.

10. The machining compensation method for a multi-spindle machining equipment according to claim 8, characterized in that, During the mass production process, the processed products are subject to random inspection. If the test results are satisfactory, the mass production process will continue. If the test results are unsatisfactory, the specific compensation parameters shall be recalibrated.

11. The machining compensation method for a multi-spindle machining equipment according to claim 1, characterized in that, All spindles were subjected to the trial machining operation under uniform reference conditions.

12. A multi-spindle machining equipment, characterized in that, Machining compensation is performed using the machining compensation method for multi-spindle machining equipment as described in any one of claims 1-11.

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