阅读说明：本技术 一种带散热片的减震壳体整体旋压成型方法 (integral spinning forming method for shock-absorbing shell with radiating fins ) 是由 梁红豪 蒋积良 武聪家 刘建冲 于文龙 张凯 于 2019-10-31 设计创作，主要内容包括：本发明公开了一种带散热片的减震壳体整体旋压成型方法,解决了现有技术中设有散热片或者焊接散热片的减震壳体散热效果不佳的问题。本发明通过激光下料、铲旋内筒、旋压散热槽、铲旋外筒和机加工五个工序,完成带有散热片的减震壳体的一体成型制造生产。其中不同的位置排布,操作顺序以及控制参数对整个产品的加工都具有关键性的作用。本发明采用旋压成型实现散热片与减震壳体的一体成型加工,力学性能分布均匀,产品的动平衡佳,提高了减震壳体的生产质量,延长了其使用寿命,符合市场需求,具有较高的推广价值。(The invention discloses a integral spinning forming method of a damping shell with radiating fins, which solves the problem of poor radiating effect of the damping shell with the radiating fins or welded radiating fins in the prior art, and completes body forming and manufacturing of the damping shell with the radiating fins by five working procedures of laser blanking, shoveling and spinning an inner cylinder, spinning a radiating groove, shoveling and spinning an outer cylinder and machining, wherein different position arrangements, operation sequences and control parameters have key effects on the processing of the whole product.)

1, damping shell integral spinning forming method with radiating fins, which is characterized in that the method comprises the following steps:

s1: laser blanking: cutting and blanking the plate by adopting a hot-rolled thick steel plate with the thickness of 8-10 mm to obtain a circular plate and a central hole;

s2: shoveling and rotating the inner cylinder: installing an upper die I and a lower die I and two shoveling rotary wheels I on a numerical control spinning machine, controlling the rotating speed of the upper die I and the lower die I to be 300-400 rpm, performing shoveling rotary operation on a circular plate by utilizing the two shoveling rotary wheels I simultaneously to form a boss on the circular plate, controlling the feeding speed of the two shoveling rotary wheels I to be 3.0-4.0 mm/s, controlling the feeding rate to be 0.5-0.8 mm/r, controlling the shoveling rotary depth to be 1.5-3.4 mm, and controlling the cutting speed to be 1.0 mm/s;

s3: spinning a heat dissipation groove: installing an upper die II and a lower die II and two shovel spinning wheels II on a numerical control spinning machine, controlling the rotating speed of the upper die II and the lower die II to be 500rpm, simultaneously pressing the shovel spinning wheels II downwards to spin the circular plate, and spinning out a groove shape on a plane, wherein the feeding rate of the two shovel spinning wheels II is controlled to be 0.5-0.8 mm/r, and the pressing depth is controlled to be 0.5-3 mm;

s4: shoveling and rotating the outer cylinder: installing an upper die III and a lower die III and a spin leveling wheel on a numerical control spinning machine, controlling the rotating speed of the upper die and the lower die to be 350rpm, performing flanging treatment on a circular plate by using the flanging wheel, performing spinning treatment by using the spin leveling wheel to form an outer cylinder concentric with the inner cylinder on the circular plate, wherein the axial feeding speed of the flanging wheel is 2.0-3.0 mm/s, the feeding rate is 0.40-0.60 mm/r, the radial feeding speed is 1.0-1.5 mm/s, the feeding rate is 0.20-0.40 mm/r, the radial feeding speed of the spin leveling wheel is 0.8-1.2 mm/s, and the feeding rate is 0.16-0.24 mm/r;

s5: machining: and (5) drilling a mounting hole on the end face of the semi-finished product formed in the step (S4), and performing machining on part of the shell on a lathe to prepare a finished product.

2. The integral spinning method of a finned damper housing according to claim 1, wherein: the specific method for shoveling and rotating the inner cylinder in the step S2 is as follows:

1. respectively installing an upper die and a lower die of an upper die and a lower die I on the positions of a universal die of a spinning machine;

2. the two shovel spinning wheels I are respectively arranged on two spinning roller frames of a spinning machine, the positions of the two shovel spinning wheels I are well adjusted to be located on two sides of a circular plate, a connecting line of the two shovel spinning wheels I and the center of a center hole of the circular plate are located on the same straight line, and the wheel axis of the two shovel spinning wheels I and the central axis of an upper die and a lower die I form an included angle of 45 degrees;

3. putting the round plate with the middle hole obtained in the step S1 into a positioning groove of a lower die;

4. moving a shoveling rotary wheel I to an initial shoveling rotary position of a circular plate, performing end face cutting operation, starting a rotary press, closing an upper die and a lower die I, controlling the rotating speed of the upper die and the lower die I to be 300-400 rmp, synchronously controlling the feeding speed of the shoveling rotary wheel I to be 3.0-4.0 mm/s, controlling the feeding rate to be 0.6-0.8 mm/r and the shoveling rotary depth to be 1.5-3.4 mm, locking the shoveling rotary wheel I to the lower position, controlling the cutting speed of the shoveling rotary wheel I to be 0.8mm/s, driving the circular plate to rotate along with the die, applying pressure to the circular plate in the axial direction by the shoveling rotary wheel I and performing radial feeding motion, gradually stripping partial plates by two shoveling rotary wheels I due to relative rotation between the shoveling rotary wheel I and the circular plate, simultaneously generating local continuous plastic deformation, and accumulating more and more plates at the front end of the shoveling rotary wheel I along with radial feeding of the shoveling rotary wheel I, gradually shift to the direction of height, after contacting the last mould, form the boss under the combined action of last mould and shovel spiral wheel I.

3. The integral spinning method of a finned damper housing according to claim 1, wherein: the specific method of spinning the heat sink in step S3 is as follows:

1. respectively installing an upper die and a lower die of the upper die and the lower die II on the universal die position of the spinning machine;

2. respectively installing two shovel spinning wheels II on two spinning roller frames of the spinning machine, adjusting the positions of the two shovel spinning wheels II to enable the shovel spinning wheels II to be located on two sides of the circular plate, and enabling the center connecting line of the two shovel spinning wheels II and the center of the center hole of the circular plate to be located on the same straight line;

3. placing the blank plate obtained in the step S2 into a positioning groove of a lower die;

4. moving the shoveling and rotating wheel II to the initial shoveling and rotating position of the blank plate, and performing end face cutting-in operation; starting the spinning machine, closing the upper die and the lower die, controlling the rotating speed of the upper die and the lower die to be 600-800 rmp, synchronously controlling the feeding speed of the shoveling and spinning wheel II to be 3.0-4.0 mm/s, controlling the feeding rate to be 0.6-0.8 mm/r, controlling the screwing depth to be 1-3.4 mm, driving the circular plate to rotate along with the die, applying pressure to the blank plate by the shoveling and spinning wheel II in the axial direction and simultaneously performing radial feeding motion, and gradually cutting the shoveling and spinning wheel II into the blank plate to enable the blank plate to be extruded into a groove shape and generate local continuous plastic deformation simultaneously, and extruding the groove shape with the specified length and height along with the radial feeding of the shoveling and spinning wheel II.

4. The integral spinning method of a finned damper housing according to claim 1, wherein: the specific method for shoveling and rotating the outer cylinder in the step S4 is as follows:

1. respectively installing an upper die and a lower die of an upper die and a lower die III on the universal die position of the spinning machine;

2. installing a flanging wheel and a spinning wheel on a spinning roller frame of a numerical control spinning machine, wherein the flanging wheel and the spinning wheel are symmetrically distributed on two sides of an upper die and a lower die, the axial line of the flanging wheel and the central axis of the upper die and the central axis of the lower die form an included angle of 45 degrees, and the axial direction of the spinning wheel is parallel to the central axis of the upper die and the central axis of the lower die;

3. feeding the semi-finished product obtained in the step S3 to a lower die of an upper die and a lower die, and starting a flanging wheel to flange;

4. and starting the rotary flattening wheel to carry out rotary flattening treatment on the turned plate, controlling the rotating speed of the upper die and the lower die to be 350rpm, controlling the radial feed speed of the rotary flattening wheel to be 0.8-1.2 mm/s and the feed rate to be 0.16-0.24 mm/r, flattening the outer surface of the outer cylinder through the rotary flattening wheel, and ensuring that the thicknesses of the upper part and the lower part of the outer cylinder are uniform.

Technical Field

The invention relates to the technical field of processing of a shock absorption shell, in particular to an integral spinning forming method of the shock absorption shell with radiating fins.

Background

The modern automobile can be provided with a crankshaft torsional vibration damper at the front end of the crankshaft with the largest torsional vibration amplitude of the engine, and can be divided into three types of power type, damping type and composite type according to the different modes of reducing torsional vibration, and the crankshaft silicone oil damper belongs to types of damping dampers.

The radiator fins are required to be welded at the bottom plate of the shell of the conventional silicone oil damper to ensure the use working condition of the damper, and gaps are formed between the shell and the radiator fins after welding to influence the radiating effect.

The method has the advantages that shrinkage cavities, shrinkage porosity and the like are easily generated in integral casting, the mechanical performance cannot be guaranteed, the sealing performance is difficult to meet the requirements, the material utilization rate is low in forging machining, machining allowance is large, a metal streamline is cut off, the corrosion resistance of parts is low, and the like.

Disclosure of Invention

Aiming at the defects in the background art, the invention provides an integral spinning forming method of a damping shell with radiating fins, which solves the problem that the damping shell with the radiating fins or welded radiating fins in the prior art has poor radiating effect.

The technical scheme of the invention is that the integral spinning forming method of the shock absorption shell with the radiating fins comprises the following steps:

s1: laser blanking: cutting and blanking the plate by adopting a hot-rolled thick steel plate with the thickness of 8-10 mm to obtain a circular plate and a central hole;

s2: shoveling and rotating the inner cylinder: installing an upper die I and a lower die I and two shoveling rotary wheels I on a numerical control spinning machine, controlling the rotating speed of the upper die I and the lower die I to be 300-400 rpm, performing shoveling rotary operation on a circular plate by using the shoveling rotary wheels I simultaneously to form a boss on the circular plate, controlling the feeding speed of the two shoveling rotary wheels I to be 3.0-4.0 mm/s, controlling the feeding rate to be 0.5-0.8 mm/r, controlling the shoveling rotary depth to be 1.5-3.4 mm, and controlling the cutting speed to be 1.0 mm/s;

s3: spinning a heat dissipation groove: installing an upper die II and a lower die II and two shovel spinning wheels II on a numerical control spinning machine, controlling the rotating speed of the upper die II and the lower die II to be 500rpm, simultaneously pressing the two shovel spinning wheels II downwards to spin the circular plate, and spinning out a groove shape on a plane, wherein the feeding rate of the shovel spinning wheels II is controlled to be 0.5-0.8 mm/r, and the pressing depth is controlled to be 0.5-3 mm;

s4: shoveling and rotating the outer cylinder: installing an upper die III and a lower die III and a spin leveling wheel on a numerical control spinning machine, controlling the rotating speed of the upper die and the lower die to be 350rpm, performing flanging treatment on a circular plate by using the flanging wheel, performing spinning treatment by using the spin leveling wheel to form an outer cylinder concentric with the inner cylinder on the circular plate, wherein the axial feeding speed of the flanging wheel is 2.0-3.0 mm/s, the feeding rate is 0.40-0.60 mm/r, the radial feeding speed is 1.0-1.5 mm/s, the feeding rate is 0.20-0.40 mm/r, the radial feeding speed of the spin leveling wheel is 0.8-1.2 mm/s, and the feeding rate is 0.16-0.24 mm/r;

s5: machining: and (5) drilling a mounting hole on the end face of the semi-finished product formed in the step (S4), and performing machining on part of the shell on a lathe to prepare a finished product.

The specific method for shoveling and rotating the inner cylinder in the step S2 is as follows:

1. respectively installing an upper die and a lower die of an upper die and a lower die I on the positions of a universal die of a spinning machine;

2. respectively installing the shovel spinning wheels I on two spinning roller frames of a spinning machine, adjusting the positions of the shovel spinning wheels I to enable the shovel spinning wheels I to be located on two sides of a circular plate, enabling a connecting line of the shovel spinning wheels I and the center of a center hole of the circular plate to be located on the same straight line, and enabling wheel axes of the shovel spinning wheels I to form an included angle of 45 degrees with the central axis of an upper die and a lower die;

3. putting the round plate with the middle hole obtained in the step S1 into a positioning groove of a lower die;

4. moving a shoveling rotary wheel I to an initial shoveling rotary position of a circular plate, performing end face cutting operation, starting a rotary press, closing an upper die and a lower die I, controlling the rotating speed of the upper die and the lower die I to be 300-400 rmp, synchronously controlling the feeding speed of the shoveling rotary wheel I to be 3.0-4.0 mm/s, controlling the feeding rate to be 0.6-0.8 mm/r and the shoveling rotary depth to be 1.5-3.4 mm, locking the shoveling rotary wheel I to the lower position, controlling the cutting speed of the shoveling rotary wheel I to be 0.8mm/s, driving the circular plate to rotate along with the die, applying pressure to the circular plate in the axial direction by the shoveling rotary wheel I and performing radial feeding motion, gradually stripping partial plates by two shoveling rotary wheels I due to relative rotation between the shoveling rotary wheel I and the circular plate, simultaneously generating local continuous plastic deformation, and accumulating more and more plates at the front end of the shoveling rotary wheel I along with radial feeding of the shoveling rotary wheel I, gradually shift to the direction of height, after contacting the last mould, form the boss under the combined action of last mould and shovel spiral wheel I.

The specific method of spinning the heat sink in step S3 is as follows:

1. respectively installing an upper die and a lower die of the upper die and the lower die II on the universal die position of the spinning machine;

2. respectively installing two shovel spinning wheels II on two spinning roller frames of the spinning machine, adjusting the positions of the two shovel spinning wheels II to enable the shovel spinning wheels II to be located on two sides of the circular plate, and enabling the center connecting line of the two shovel spinning wheels II and the center of the center hole of the circular plate to be located on the same straight line;

3. placing the blank plate obtained in the step S2 into a positioning groove of a lower die;

4. moving the shoveling and rotating wheel II to the initial shoveling and rotating position of the blank plate, and performing end face cutting-in operation; starting the spinning machine, closing the upper die and the lower die, controlling the rotating speed of the upper die and the lower die to be 600-800 rmp, synchronously controlling the feeding speed of the shoveling and spinning wheel II to be 3.0-4.0 mm/s, controlling the feeding rate to be 0.6-0.8 mm/r, controlling the screwing depth to be 1-3.4 mm, driving the circular plate to rotate along with the die, applying pressure to the blank plate by the shoveling and spinning wheel II in the axial direction and simultaneously performing radial feeding motion, and gradually cutting the shoveling and spinning wheel II into the blank plate to enable the blank plate to be extruded into a groove shape and generate local continuous plastic deformation simultaneously, and extruding the groove shape with the specified length and height along with the radial feeding of the shoveling and spinning wheel II.

The specific method for shoveling and rotating the outer cylinder in the step S4 is as follows:

1. respectively installing an upper die and a lower die of an upper die and a lower die III on the universal die position of the spinning machine;

2. installing a flanging wheel and a spinning wheel on a spinning roller frame of a numerical control spinning machine, wherein the flanging wheel and the spinning wheel are symmetrically distributed on two sides of an upper die and a lower die, the axial line of the flanging wheel and the central axis of the upper die and the central axis of the lower die form an included angle of 45 degrees, and the axial direction of the spinning wheel is parallel to the central axis of the upper die and the central axis of the lower die;

3. feeding the semi-finished product obtained in the step S3 to a lower die of an upper die and a lower die, and starting a flanging wheel to flange;

4. and starting the rotary flattening wheel to carry out rotary flattening treatment on the turned plate, controlling the rotating speed of the upper die and the lower die to be 350rpm, controlling the radial feed speed of the rotary flattening wheel to be 0.8-1.2 mm/s and the feed rate to be 0.16-0.24 mm/r, flattening the outer surface of the outer cylinder through the rotary flattening wheel, and ensuring that the thicknesses of the upper part and the lower part of the outer cylinder are uniform.

The machining process has the key effects on the machining of the whole product through five working procedures of laser blanking, shoveling and rotating the inner cylinder, spinning the heat dissipation groove, shoveling and rotating the outer cylinder and machining, namely, for a shoveling and rotating thickening process, two shoveling and rotating wheels are symmetrically arranged on two sides of a plate to perform shoveling and rotating, the speed of the two shoveling and rotating wheels is controlled, the phenomenon that the plate shakes to cause metal flow disorder due to uneven stress caused by single-side stress of the plate is avoided, the stability in the shoveling and rotating process is improved due to uniform stress on two sides, the metal disorder caused by local loading is avoided, the quality of a workpiece is improved, the feeding speed and the feeding rate of the two shoveling and rotating wheels are controlled at the same time, the growth process of the inner cylinder is stable, the thickness is uniform up and down, the height meets the requirement of the workpiece, the surface precision of the workpiece is improved, the mechanical properties are uniformly distributed, the dynamic balance of the product is good, the production quality of the damping shell is improved, the service life of the damping shell is prolonged, the market value is high, and the pushing value is high.

Drawings

In order to illustrate the embodiments of the present invention more clearly, the drawings that are needed in the description of the embodiments will be briefly described below, and it is apparent that the drawings in the description below are only embodiments of the present invention, and that other drawings may be obtained by those skilled in the art without inventive effort.

FIG. 1 is a schematic structural view of a circular plate with a central hole obtained in a blanking process;

FIG. 2 is a schematic view of an inner-cylinder type circular plate manufactured by a process of shoveling and rotating an inner cylinder;

FIG. 3 is a schematic view of a circular plate for a heat sink manufactured by a spinning process;

FIG. 4 is a schematic view of a circular plate of an outer cylinder manufactured in the outer cylinder shoveling and rotating process;

FIG. 5 is a schematic structural view of a finished damper housing made by a machining process;

FIG. 6 is a schematic view of the die assembly for the process of turning the inner barrel of the shovel of the present invention;

FIG. 7 is a schematic view of the die assembly for the spinning of the heat sink according to the present invention;

FIG. 8 is a schematic view of the die assembly in the outer cylinder spinning process of the present invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only partial embodiments of the present invention , rather than all embodiments.