阅读说明：本技术 一种汽车变速器滤清器壳制造方法 (Manufacturing method of automobile transmission filter shell ) 是由 徐广鑫 刘建军 刘晶磊 于 2020-06-28 设计创作，主要内容包括：本发明属于模具设计制造,具体地而言为一种汽车变速器滤清器壳制造方法。方法包括：模具腔开粗；模具淬火；模具精加工；火花加工；对模具型腔进行三坐标测量；模具加工完毕后试模；根据零件的测绘报告,和模具的报告进行对比直到圆径为正圆；零件所有的横截面圆为正圆后,使用轮廓仪对零件进行螺纹测量。本发明可以保证精密塑料零件圆度,平行度的要求,可使精密塑料件一次加工成型以代替金属切削加工。(The invention belongs to the design and manufacture of a die, and particularly relates to a method for manufacturing a filter shell of an automobile transmission. The method comprises the following steps: opening a mold cavity roughly; quenching the die; performing finish machining on the die; spark machining; carrying out three-coordinate measurement on the mold cavity; testing the die after the die is machined; comparing the mapping report of the part with the report of the die until the circle diameter is a perfect circle; and after all cross section circles of the part are perfect circles, performing thread measurement on the part by using a profile gauge. The invention can ensure the requirements of roundness and parallelism of the precision plastic parts, and can make the precision plastic parts be processed and formed at one time to replace metal cutting.)

1. A method of manufacturing a filter housing for an automotive transmission, the method comprising:

step 1, opening a mold cavity roughly, and cutting a tool intoOpening coarse cutter, rotating at 2000 rpm, feeding 1000mm/min, and semi-refining

step 2, quenching the die, after the die cavity is opened roughly, quenching the die cavity in a vacuum state to ensure that the hardness reaches HRC 48-52;

step 3, performing finish machining on the die, namely, after the die is quenched, causing die cavity deformation due to high temperature, firstly, re-squaring the die cavity, integrally machining the die cavity into a rectangle, performing numerical control finish machining, and using

step 4, performing spark machining, namely machining the integral electrode by using a herdskin machine, and machining a threaded area by using a graphite electrode;

step 5, carrying out three-coordinate measurement on the die cavity, repeatedly processing the unqualified size until the processing precision of the die cavity and the error of data are within +/-0.02 mm, and carrying out die assembly and assembly;

step 6, testing the die after the die is machined;

step 7, comparing the mapping report of the part with the report of the die, adjusting the minor axis of the ellipse of the part because the first processing of the die is perfect circle processing and the precision is +/-0.05 mm, the shrinkage of the part is not perfect circle necessarily, and is definitely ellipse, and the diameter size of the circle is smaller than the size required by a drawing, deepening the edge of the minor axis shrunk from the corresponding part on the basis that the die is perfect circle, so that the minor axis of the existing part and the major axis of the part are unified, and ensuring the tolerance of the diameter of the circle to +/-0.1, and performing the previous processing steps until the diameter of the circle is perfect circle;

and 8, after all cross section circles of the part are perfect circles, measuring the threads of the part by using a contourgraph, sampling and fitting the highest points of the threads into a straight line according to drawing requirements, fitting the highest points of the threads into a sealing groove of the part, wherein the size of the outer wall is 0.4-0.5mm, continuously adjusting the mould according to the existing mould data, continuously processing the size of the threads on the premise of locking the perfect circle of the sealing groove, ensuring that the distance from a fitting line of the highest point of each thread to the uppermost edge of the sealing groove is 0.4-0.5mm, and repeatedly using the steps 4-7 for adjustment until the highest point is qualified.

2. The method of claim 1,

in the step 4, the first section of current 4A and the second section of current 3A of the rough electrode are processed, the first section of fine electrode parameters 2A and the second section of fine electrode parameters 1A are processed.

3. The method of claim 1, wherein, in step 6,

the seal groove upper edge is reserved with machining allowance, the size is reserved with 0.1mm machining allowance, the first section 95PA of injection molding pressure, the second section 80PA of injection molding pressure and the pressure maintaining pressure 115PA are subjected to mold testing according to the pressure without damage to a machine tool and a mold, the pressure is locked, the parameters are used as locking quantities, and the three-coordinate mapping is carried out on the mold testing part after the mold testing.

Technical Field

The invention belongs to the design and manufacture of a die, and particularly relates to a method for manufacturing a filter shell of an automobile transmission.

Background

In the process of machining the automobile transmission filter shell, the automobile transmission filter shell (see attached figure 1) is circular, and the roundness of parts is required, the circular machining method is adopted in the conventional machining die, but the parts can deform due to the principle of plastic expansion caused by heat and contraction caused by cold, the contracted parts can be changed into irregular shapes similar to ellipses, the method for machining the threads is to machine an integral electrode by turning, the adjustment is inconvenient after the electrode is machined, and the subsequent size adjustment is extremely inconvenient.

The drawing of a part is systematically analyzed, mold flow analysis is carried out, the analysis result is that a circular mold is shrunk into a circular shape, but the software analysis result is the result in an ideal state and the actual in-and-out is very large, if an imported precise injection molding machine is used, the error probably will be reduced under the maximum processing condition, but the service life of the injection molding machine and the service life of the mold will be fatally influenced, the existing domestic old machine is used, and the domestic injection molding machine and the mold cannot be continuously produced at all under the continuous maximum pressure environment, and the failure frequency is high.

The die is machined, the original machining method is to use a turned integral electrode or a milled single electrode, the machining precision is influenced, if the turning electrode has a problem in machining, the machining precision on a secondary machine is influenced, and a set of threads of the single milling electrode are split into a plurality of electrodes for machining, so that machining errors are accumulated.

Disclosure of Invention

The invention aims to solve the technical problem of providing a method for manufacturing a filter shell of an automobile transmission, which solves the problems of low processing precision and large error.

The invention is realized in this way, a method for manufacturing a filter case of an automobile transmission, the method comprising:

step 1, opening a mold cavity roughly, and cutting a tool into

Opening coarse cutter, rotating at 2000 rpm, feeding 1000mm/min, and semi-refiningThe cutter is fed at the rotating speed of 2000 r/min and the feeding speed of 1000mm/min and finally usedBack chipping by a milling cutter, and roughly cutting and reserving a margin of 0.5 mm;

step 2, quenching the die, after the die cavity is opened roughly, quenching the die cavity in a vacuum state to ensure that the hardness reaches HRC 48-52;

step 3, fine machining the die, wherein the die cavity is deformed due to high temperature after the die is quenched, the die cavity is firstly squared again, the die cavity is integrally machined into a rectangle, the finish machining is carried out in a numerical control mode,use of

The thread and the circle diameter of the milling cutter fine machining die are machined to the designed size, and the allowance of 0.2mm is reserved at the upper edge position of the sealing groove and is used as an adjustment amount;

step 4, performing spark machining, namely machining the integral electrode by using a herdskin machine, and machining a threaded area by using a graphite electrode;

step 5, carrying out three-coordinate measurement on the die cavity, repeatedly processing the unqualified size until the processing precision of the die cavity and the error of data are within +/-0.02 mm, and carrying out die assembly and assembly;

step 6, testing the die after the die is machined;

step 7, comparing the mapping report of the part with the report of the die, adjusting the minor axis of the ellipse of the part because the first processing of the die is perfect circle processing and the precision is +/-0.05 mm, the shrinkage of the part is not perfect circle necessarily, and is definitely ellipse, and the diameter size of the circle is smaller than the size required by a drawing, deepening the edge of the minor axis shrunk from the corresponding part on the basis that the die is perfect circle, so that the minor axis of the existing part and the major axis of the part are unified, and ensuring the tolerance of the diameter of the circle to +/-0.1, and performing the previous processing steps until the diameter of the circle is perfect circle;

and 8, after all cross section circles of the part are perfect circles, measuring the threads of the part by using a contourgraph, sampling and fitting the highest points of the threads into a straight line according to drawing requirements, fitting the highest points of the threads into a sealing groove of the part, wherein the size of the outer wall is 0.4-0.5mm, continuously adjusting the mould according to the existing mould data, continuously processing the size of the threads on the premise of locking the perfect circle of the sealing groove, ensuring that the distance from a fitting line of the highest point of each thread to the uppermost edge of the sealing groove is 0.4-0.5mm, and repeatedly using the steps 4-7 for adjustment until the highest point is qualified.

Further, in the step 4, a first section of current 4A of the rough electrode is printed, a second section of current 3A of the rough electrode is printed, a first section of fine electrode printing 2A of the fine electrode printing parameter is printed, and a second section of 1A is processed.

Further, in step 6,

the seal groove upper edge is reserved with machining allowance, the size is reserved with 0.1mm machining allowance, the first section 95PA of injection molding pressure, the second section 80PA of injection molding pressure and the pressure maintaining pressure 115PA are subjected to mold testing according to the pressure without damage to a machine tool and a mold, the pressure is locked, the parameters are used as locking quantities, and the three-coordinate mapping is carried out on the mold testing part after the mold testing.

Compared with the prior art, the invention has the beneficial effects that:

the invention can ensure the requirements of roundness and parallelism of the precision plastic parts, and can make the precision plastic parts be processed and formed at one time to replace metal cutting.

Drawings

Fig. 1 is a schematic structural diagram of a product to be processed according to an embodiment of the present invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail with reference to the following embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

Referring to fig. 1, a method for manufacturing a filter case for an automobile transmission according to the present invention includes:

firstly, a die cavity is opened roughly, a machining center is used, and a cutter isOpening coarse cutter, rotating at 2000 rpm, feeding 1000mm/min, and semi-refiningThe cutter is fed at the rotating speed of 2000 r/min and the feeding speed of 1000mm/min and finally usedAnd (5) back chipping by using a milling cutter, and coarsely reserving the allowance of 0.5 mm.

Secondly, quenching the die, wherein after the die cavity is opened roughly, the die cavity is quenched in a vacuum state to ensure that the hardness reaches HRC 48-52;

thirdly, fine machining the die, wherein the die cavity is deformed due to high temperature after the die is quenched, firstlyThe die cavity is squared again, integrally processed into a rectangle, numerically controlled and finely processed, and used

The thread and the circle diameter of the milling cutter finish machining die are machined to the designed size, the allowance of 0.2mm is reserved at the position of the upper edge 1 of the sealing groove to serve as an adjusting amount, and the upper edge 1 of the sealing groove is located at the upper end of the sealing groove 2.

Fourthly, spark machining, namely machining the integral electrode by using a herdsman machine, machining a threaded area 3 by using a graphite electrode, roughly welding a first section of current 4A of the electrode, finely welding a second section of current 3A of the electrode, finely welding a first section of fine welding 2A of electrode parameters, and machining a second section of fine welding 1A;

fifthly, measuring three coordinates of the die cavity, repeatedly processing the unqualified size until the processing precision of the die cavity and the error of data are within +/-0.02 mm, and assembling the die;

sixthly, testing the mold after the mold is machined, reserving machining allowance on the upper edge of the sealing groove, reserving machining allowance of 0.1mm in size, testing the mold according to the pressure which does not damage a machine tool and the mold, performing injection molding on the first section 95PA, the second section 80PA and the pressure maintaining pressure 115PA, locking the pressure, and mapping the part of the tested mold by using three coordinates after the mold testing by taking the parameters as locking quantities;

seventhly, comparing the mapping report of the part with the report of the die, wherein the first processing of the die is a perfect circle processing with the precision of +/-0.05 mm, the shrinkage of the part is not necessarily a perfect circle, but is definitely an ellipse, the diameter of the circle is smaller than the size required by a drawing, the minor axis of the ellipse of the part needs to be adjusted, and the edge of the minor axis corresponding to the shrinkage of the part is deepened on the basis that the die is a perfect circle, so that the minor axis of the existing part and the major axis of the part are unified, and the tolerance of the diameter of the circle is guaranteed to +/-0.1, and the previous processing steps are carried out until the diameter of the circle is a perfect circle (the diameter of the circle is +/-0.1);

and eighthly, after all cross section circles of the part are perfect circles, measuring the threads of the part by using a contourgraph, sampling and fitting the highest points of the threads into a straight line according to a drawing requirement, fitting the highest points of the threads into a sealing groove of the part, wherein the size of the outer wall of the straight line is 0.4-0.5mm, continuously adjusting the die according to the existing die data, continuously processing the size of the threads on the premise of locking the perfect circle of the sealing groove, ensuring that the distance from a fitting line of the highest point of each thread to the uppermost edge of the sealing groove is 0.4-0.5, and repeatedly using the steps 4-7 to adjust until the highest point is qualified.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.