Machining method and system of oil return line mold and product of oil return line mold

Abstract

The invention discloses a machining method and system for an oil return line die and a product thereof, and the machining method comprises the following steps: step A: firstly, clamping and fixing a workpiece at one time by using a turning and milling combined machining center with a B-axis rotation function; step B, synchronously finishing excircle machining, forming of a threaded oil return line and cutting of a breakpoint groove through matching of the rotating angle of the cutter and the inclined surface of the outer diameter of the workpiece; c, on the basis of a preset function operation compensation model, compensating the thread pitch and the inclined surface thread angle of the threaded oil return line; according to the method, the inconvenience of multiple times of clamping, sequence turning and naked eye observation machining in the machining process is conveniently reduced, machining can be completed through one-time clamping, the risk of accumulated errors such as multi-procedure conversion and multiple times of tool setting and electrode abrasion in the prior art is reduced, the machining efficiency is greatly improved, the precision is high, through two-time function operation compensation, the machining precision is greatly improved, and the machining precision is greatly improved. The position and screw pitch errors of the threaded oil return line are greatly reduced, and the good machining qualification rate is guaranteed.

Description

Technical Field

[0001] The invention specifically relates to a processing method, system and product of an oil return line mould. Background Art

[0002] High-speed oil seals are usually used in hydraulic, pneumatic and lubrication systems. They have the function of preventing liquid or gas leakage. They are usually processed through oil return line molds. The oil return line plays an important role in oil seal design and application. When processing the oil return line mold, first use a CNC lathe to process the outer diameter bevel and the threaded oil return line, then use a fixture to tilt the workpiece, and use electric pulse discharge to process two stop points.

[0003] In the existing oil return line mold processing, it is necessary to make fixtures of different specifications according to different inclined surfaces to assist electric pulses in processing the oil return stop breakpoint. The production of various tooling fixtures is time-consuming and laborious, and cumulative errors will occur between the workpiece and the fixture. In addition, since the minimum distance between the stop point and the threaded oil return line is only 0.05mm, it is necessary to manually observe the stop breakpoint position through a magnifying glass and roughly move the electrode for processing. The operation is also difficult, the qualified rate is low, and the processing effect is not good. For this reason, we propose a processing method, system and product of the oil return line mold. Summary of the invention

[0004] The purpose of the present invention is to provide a processing method, system and product of an oil return line mold, so as to solve the problems raised in the above background technology, such as the need to clamp the workpiece multiple times, adjust the bevel angle, which is time-consuming and laborious, and manually observe the breakpoint and move the electrode for processing, which is difficult and has large errors.

[0005] To achieve the above object, the present invention provides the following technical solution: a processing method for a high-speed oil seal oil return line mold, comprising the following steps:

[0006] Step A: Use a milling machine with B-axis rotation function to first fix the workpiece in one go using a three-jaw clamp;

[0007] Step B: by matching the tool rotation angle with the workpiece outer diameter slope, the outer circle machining, the threaded oil return line forming and the breakpoint groove cutting are completed simultaneously;

[0008] Step C: Based on the preset function calculation compensation model, the pitch of the threaded oil return line and the angle of the inclined thread are compensated to ensure the processing accuracy;

[0009] Step D: After processing, release the workpiece from the three-jaw clamping and replace it with the next workpiece.

[0010] Preferably, the function of the supplementary pitch in step C is: l=cosα×p;

[0011] Among them, p is the preset pitch, and α is the thread profile angle.

[0012] Preferably, the function for supplementing the inclined surface thread angle in step C is:

[0013] Among them, h is the preset depth, and α is the thread profile angle.

[0014] Preferably, the turning-milling compound machining center is of the MAZAK INTEGREX I200S type.

[0015] Preferably, the depth of the spiral oil return line is 0.16 mm, the thread profile angle is 20°, and the pitch is 0.35 mm.

[0016] A processing system for a high-speed oil seal return line mold, applying the processing method according to any one of claims 1-5, includes:

[0017] A turning-milling compound machining center with a B-axis rotation function;

[0018] A tool path control module integrating the function operation compensation model;

[0019] A real-time monitoring unit for synchronously feeding back the machining position error and triggering dynamic correction.

[0020] Preferably, the tool path control module is built-in with a dynamic interpolation algorithm based on the inclined surface angle and pitch parameters.

[0021] A high-speed oil seal mold product processed by the method or system according to any one of claims 1-7, wherein the spacing tolerance between the break points of the oil return line and the thread line is ≤±0.005 mm, and the surface roughness Ra≤0.8 μm.

[0022] Compared with the prior art, the beneficial effects of the present invention are:

[0023] The present invention facilitates reducing the inconvenience of multiple clamping, transfer, and visual inspection during the machining process. Through a single precision three-jaw chuck fixation, all processes can be completed, reducing the risk of cumulative errors and electrode wear caused by multiple processes and conversions between machining equipment and multiple tool settings in the past. Through the present invention, the machining efficiency and accuracy are greatly improved, and through two function operation compensations, the position and pitch errors of the spiral oil return line are greatly reduced, ensuring a good machining qualification rate. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 is a flow schematic diagram of the present invention;

[0025] Figure 2 is a schematic diagram of an existing adjusted clamping inclined surface;

[0026] Figure 3 Schematic diagram of clamping and processing for the present invention;

[0027] Figure 4 Schematic diagram of the oil return line of the processed mold for the present invention;

[0028] Figure 5 Schematic diagram of the break point of the oil return line after processing for the present invention. Specific implementation manners

[0029] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0030] Please refer to Figures 1-4 , the present invention provides a technical solution: a processing method for a high-speed oil seal oil return line mold, including the following steps:

[0031] Step A: Use a turning-milling compound machining center with a B-axis rotation function. First, fix the workpiece through three-jaw clamping at one time;

[0032] Step B: Through the matching of the tool rotation angle and the outer diameter slope of the workpiece, synchronously complete the outer circle processing, the formation of the threaded oil return line, and the cutting of the break point groove;

[0033] Step C: Based on a preset function operation compensation model, compensate the pitch and the slope thread angle of the threaded oil return line to ensure the processing accuracy;

[0034] Step D: After processing, release the three-jaw clamping of the workpiece and replace the next workpiece.

[0035] By combining the turning-milling compound machining technology and the mathematical compensation algorithm, the problems of accuracy and efficiency in the manufacturing of high-speed oil seal molds are solved, and it is convenient to avoid the need for multiple clamping and processing of the molds. Through the compound machining center with a B-axis rotation function in the present invention, the entire oil return line can be processed with one clamping, and the error generated during the processing of the thread on the slope can be reduced by using the supplementary function algorithm, greatly improving the accuracy.

[0036] Preferably, the function for supplementing the pitch in step C is: l = cosα × p

[0037] where p is the preset pitch and α is the thread profile angle.

[0038] Since such oil return patterns are all on the inclined surfaces of the parts, it is convenient to better calculate the correct pitch through function according to the inclined surface angle to be machined, ensuring that the oil return patterns of the machined parts meet the requirements of the drawing.

[0039] Preferably, the function for supplementing the inclined surface thread angle in step C is:

[0040] where h is the preset depth and α is the thread profile angle.

[0041] It is convenient to better adjust the rotation angle of the main shaft during machining to machine an inclined surface angle that meets the dimensions.

[0042] Preferably, the turning-milling compound machining center is of the MAZAK INTEGREX I200S type.

[0043] Preferably, the depth of the spiral oil return line is 0.16 mm, the thread profile angle is 20°, and the pitch is 0.35 mm.

[0044] It is convenient to perform post-processing adjustment according to the preset depth, thread profile angle and pitch to supplement the required pitch and machining rotation angle.

[0045] A machining system for a high-speed oil seal oil return line mold, applying the machining method of the high-speed oil seal oil return line mold, includes:

[0046] A turning-milling compound machining center with a B-axis rotation function;

[0047] A tool path control module integrating a function operation compensation model;

[0048] A real-time monitoring unit for synchronously feeding back the machining position error and triggering dynamic correction.

[0049] It is convenient to machine according to the method of the present invention.

[0050] Preferably, the tool path control module is built-in with a dynamic interpolation algorithm based on the inclined surface angle and pitch parameters.

[0051] It is convenient to better avoid the generation of thread machining errors on the inclined surface according to the algorithm.

[0052] A high-speed oil seal mold product is machined and manufactured by the machining method or system of the high-speed oil seal oil return line mold, and the spacing tolerance between the break points of its oil return line and the thread line is ≤±0.005 mm, and the surface roughness Ra≤0.8 μm.

[0053] It is convenient to machine a better precision effect.

[0054] Although embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A method for processing a high-speed oil seal oil return line mold, characterized in that: The steps include: Step A: Use a milling machine with B-axis rotation function to first fix the workpiece in one go using a three-jaw clamp; Step B: by matching the tool rotation angle with the workpiece outer diameter slope, the outer circle machining, the threaded oil return line forming and the breakpoint groove cutting are completed simultaneously; Step C: Based on the preset function calculation compensation model, the pitch of the threaded oil return line and the angle of the inclined thread are compensated to ensure the processing accuracy; Step D: After processing, release the workpiece from the three-jaw clamping and replace it with the next workpiece.

2. The method for processing a high-speed oil seal oil return line mold according to claim 1, characterized in that: The function of the supplementary pitch in step C is: l = cos α × p; Among them, p is the preset pitch and α is the tooth angle.

3. The method for processing a high-speed oil seal return line mold according to claim 1, characterized in that: The function of the supplementary bevel thread angle in step C is: θ=tanα×h; Among them, h is the preset depth and α is the tooth angle.

4. The method for processing a high-speed oil seal oil return line mold according to claim 1, characterized in that: The turning-milling compound machining center is of the MAZAK INTEGREX I200S type.

5. The method for processing a high-speed oil seal oil return line mold according to claim 1, characterized in that: The depth of the threaded oil return line is 0.16 mm, the tooth angle is 20°, and the pitch is 0.35 mm.

6. A high-speed oil seal return line mold processing system, characterized in that: The processing method according to any one of claims 1 to 5 comprises: Turning and milling machining center with B-axis rotation function; A tool path control module integrating the functional operation compensation model; Real-time monitoring unit, used to synchronously feedback processing position error and trigger dynamic correction.

7. A high-speed oil seal oil return line mold processing system according to claim 6, characterized in that: The tool path control module has a built-in dynamic interpolation algorithm based on the bevel angle and pitch parameters.

8. A high-speed oil seal mold product, characterized in that: The material is manufactured by the method or system described in any one of claims 1 to 7, and the spacing tolerance between the breakpoint of the oil return line and the thread line is ≤±0.005mm, and the surface roughness Ra is ≤0.8μm.

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