CN105642803A - Combined extrusion machining method for automobile starting guide cylinder - Google Patents
Combined extrusion machining method for automobile starting guide cylinder Download PDFInfo
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- CN105642803A CN105642803A CN201610013475.3A CN201610013475A CN105642803A CN 105642803 A CN105642803 A CN 105642803A CN 201610013475 A CN201610013475 A CN 201610013475A CN 105642803 A CN105642803 A CN 105642803A
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- guide cylinder
- compound extrusion
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- 238000001125 extrusion Methods 0.000 title claims abstract description 105
- 238000000034 method Methods 0.000 title claims abstract description 46
- 238000003754 machining Methods 0.000 title abstract description 12
- 239000000463 material Substances 0.000 claims abstract description 43
- 238000000137 annealing Methods 0.000 claims abstract description 11
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 claims abstract description 8
- 229910052698 phosphorus Inorganic materials 0.000 claims abstract description 8
- 239000011574 phosphorus Substances 0.000 claims abstract description 8
- 238000007127 saponification reaction Methods 0.000 claims abstract description 8
- 150000001875 compounds Chemical class 0.000 claims description 80
- 238000003672 processing method Methods 0.000 claims description 25
- 238000004519 manufacturing process Methods 0.000 claims description 24
- 238000001816 cooling Methods 0.000 claims description 5
- 238000005098 hot rolling Methods 0.000 claims description 5
- 241001074085 Scophthalmus aquosus Species 0.000 claims description 3
- 238000005242 forging Methods 0.000 abstract description 8
- 239000002184 metal Substances 0.000 abstract description 2
- 238000005422 blasting Methods 0.000 abstract 1
- 238000004033 diameter control Methods 0.000 description 4
- 238000004080 punching Methods 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 2
- 238000002789 length control Methods 0.000 description 2
- 238000007493 shaping process Methods 0.000 description 2
- 230000001360 synchronised effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000011010 flushing procedure Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 239000007858 starting material Substances 0.000 description 1
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
- B21J5/00—Methods for forging, hammering, or pressing; Special equipment or accessories therefor
- B21J5/002—Hybrid process, e.g. forging following casting
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
- B21J13/00—Details of machines for forging, pressing, or hammering
- B21J13/02—Dies or mountings therefor
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
- B21J5/00—Methods for forging, hammering, or pressing; Special equipment or accessories therefor
- B21J5/06—Methods for forging, hammering, or pressing; Special equipment or accessories therefor for performing particular operations
- B21J5/08—Upsetting
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02N—STARTING OF COMBUSTION ENGINES; STARTING AIDS FOR SUCH ENGINES, NOT OTHERWISE PROVIDED FOR
- F02N15/00—Other power-operated starting apparatus; Component parts, details, or accessories, not provided for in, or of interest apart from groups F02N5/00 - F02N13/00
Abstract
The invention provides a combined extrusion machining method for an automobile starting guide cylinder, and belongs to the field of metal precision forging processes. The combined extrusion machining method for the automobile starting guide cylinder comprises the steps of material sawing, annealing, blank forming, shot blasting and phosphorus saponification treatment, forward extrusion, upsetting, boring of a technical hole, phosphorus saponification treatment, and combined extrusion forming of an irregular-shaped curved surface cavity and a spiral inner spline, and accordingly the automobile starting guide cylinder is obtained. In the step of combined extrusion forming, a combined extrusion punch is used for machining a workpiece and comprises a first punch body used for machining the spiral inner spline in a rotary extrusion mode and a second punch body used for machining the irregular-shaped curved surface cavity in a reverse extrusion mode, the first punch body and the second punch body are arranged coaxially, the top of the first punch body is sleeved with the second punch head, and the first punch body can be connected to the second punch body in the mode of being capable of rotating around the axis relative to the second punch body. According to the combined extrusion machining method for the automobile starting guide cylinder, extrusion forming of the irregular-shaped curved surface cavity and the spiral inner spline of the automobile starting guide cylinder can be completed at a time, so that the machining efficiency is high, and the forging cost is low.
Description
Technical field
The present invention relates to precision metal Forging Technology field, in particular to the Compound Extrusion processing method of a kind of automobile start guide cylinder.
Background technology
Automobile start guide cylinder is the vital part in automobile starter, complex-shaped, and M93 automobile start guide cylinder 100 shown in Figure 1, its top has special-shaped curved die cavity 120, and bottom has internal helix spline 110. In auto industry the required precision of automobile start guide cylinder is high, the especially axiality requirement to the special-shaped curved die cavity 120 on top with the internal helix spline 110 of bottom.
At present, the processing method of automobile start guide cylinder is working special-shaped curved die cavity and internal helix spline usually respectively, referring specifically to application for a patent for invention ZL201310291452.5 (inventor: Wang Ping, Wang Bin, Cai Yonghui, Lin Xinyan, tight flushing), it discloses a kind of raising and start the processing method of special-shaped curved die cavity and internal spline coaxiality in guide cylinder, this processing method comprises the steps: (1) saw material, (2) annealing, (3) base, (4) ball blast processes with phospholeumization, (5) just crowded, (6) jumping-up, (7) anti-crowded special-shaped curved die cavity and pilot hole, (8) based on pilot hole rotary squeezing internal helix spline. although above-mentioned processing technique improves the axiality of the special-shaped curved die cavity in top and lower part helical internal spline to a certain extent, but still there are the following problems: 1, owing to the special-shaped curved die cavity in automobile start guide cylinder top and lower part helical internal spline are forging and moldings at twice, therefore, working (machining) efficiency is low, and forging cost is high. 2, this processing technique adopts the special-shaped curved die cavity working special-shaped curved die cavity of reverse extrusion drift, adopt internal helix spline rotary squeezing drift processing automobile internal helix spline, the special-shaped curved die cavity of automobile start guide cylinder and internal helix spline axiality, not only to be limited by the impact of special-shaped curved die cavity reverse extrusion drift and internal helix spline rotary squeezing drift, it is additionally subjected to the impact of pilot hole forming accuracy, therefore gradation processing technique is it is difficult to ensure that special-shaped curved die cavity and internal helix spline axiality, namely it is difficult to ensure that the precision of automobile start guide cylinder.
Summary of the invention
It is an object of the invention to provide the Compound Extrusion processing method of a kind of automobile start guide cylinder, it is possible to a step completes special-shaped curved die cavity and the internal helix spline extrusion molding of automobile start guide cylinder, and working (machining) efficiency is high, forging cost is low.
The present invention is achieved in that the Compound Extrusion processing method of a kind of automobile start guide cylinder, comprises the following steps:
Saw material; Annealing; Base obtains blank; Ball blast processes with phospholeumization; Just crowded; Jumping-up obtains workpiece; Bore boring fabrication hole; Phospholeumization processes; Special-shaped curved die cavity and internal helix spline Compound Extrusion shape, and obtain automobile start guide cylinder;
Wherein special-shaped curved die cavity and internal helix spline Compound Extrusion forming step are to adopt Compound Extrusion drift that the workpiece through phosphorus saponification treatment step is processed, Compound Extrusion drift includes the first drift for rotary squeezing processing internal helix spline and the second drift for the working special-shaped curved die cavity of reverse extrusion, first drift and the second drift are coaxially disposed, second drift is set in the top of the first drift, and the first drift can be connected to the second drift around axis relative to what the second drift rotated.
In preferred embodiment of the present invention, above-mentioned special-shaped curved die cavity is with internal helix spline Compound Extrusion forming step, and Compound Extrusion drift is installed on forcing press and the axis in Alignment Process hole, forcing press drives Compound Extrusion drift descending, and workpiece is carried out Compound Extrusion.
In preferred embodiment of the present invention, the bottom of above-mentioned first drift is guide part, bores in boring fabrication hole step, bores the diameter diameter equal to guide part of the fabrication hole that boring obtains.
In preferred embodiment of the present invention, the diameter of above-mentioned fabrication hole is �� 17mm-�� 19mm.
In preferred embodiment of the present invention, above-mentioned special-shaped curved die cavity and in internal helix spline Compound Extrusion forming step, when the effective depth of the special-shaped curved die cavity that the extruding of Compound Extrusion drift is formed is more than 22mm, obtain automobile start guide cylinder.
In preferred embodiment of the present invention, the process of above-mentioned saw material step is: selecting diameter to be �� 49mm-�� 51mm, material trademark be the hot rolling round bar of 20CrMo, it is carried out saw material, the length controlling every section of saw material is 52mm-53mm.
In preferred embodiment of the present invention, the process of above-mentioned annealing steps is: heats the saw material through saw material step to 780 DEG C-810 DEG C in stove, is incubated 4-7 hour; Then it is cooled to 690 DEG C-710 DEG C, is incubated 4-7 hour; It is cooled to 280 DEG C-320 DEG C, air cooling of coming out of the stove with stove.
In preferred embodiment of the present invention, the process of above-mentioned base step is: after heart carrier is contained in an outer nose circle of saw material of annealed step, with top two centre bores that withstand, rough turn outer nose circle diameter is to �� 48.1mm-�� 48.3mm, and by cylindrical chamfer to 2 �� 45 ��; Reverse end for end to be contained in heart carrier another outer nose circle of saw material again, with top two centre bores that withstand, another outer nose circle diameter rough turn is to �� 48.1mm-�� 48.3mm, and by another cylindrical chamfer to 2 �� 45 ��, controlling each outer nose circle length is 51.1mm-51.3mm, obtains blank.
In preferred embodiment of the present invention, in above-mentioned just crowded step, forward extrusion is through the blank of ball blast Yu phosphorus saponification treatment step, and the diameter making the upper outer nose circle of blank is �� 48.6mm-�� 48.7mm, and the length of upper outer nose circle is 37.5mm-38mm; The diameter making the lower outer nose circle of blank is �� 34.5mm-�� 34.6mm.
In preferred embodiment of the present invention, in above-mentioned jumping-up step, by the upper outer nose circle diameter jumping-up of the blank through just squeezing step to �� 59.6mm-�� 59.7mm, obtain workpiece.
Compared with prior art, the invention has the beneficial effects as follows:
In Compound Extrusion processing method of the present invention, Compound Extrusion drift is adopted to complete special-shaped curved die cavity and the shaping of internal helix spline Compound Extrusion of automobile start guide cylinder. In punching course, first drift of Compound Extrusion drift can rotate about the axis thereof, second drift does not rotate, first drift and the second drift can carry out each self-corresponding processing work simultaneously, can a step completes special-shaped curved die cavity, internal helix spline shapes, and the special-shaped curved die cavity that obtains of processing and internal helix spline coaxial. Therefore, processing method of the present invention can guarantee that the precision of automobile start guide cylinder, and working (machining) efficiency is high, forging cost is low.
Accompanying drawing explanation
In order to be illustrated more clearly that the technical scheme of the embodiment of the present invention, the accompanying drawing used required in embodiment will be briefly described below, it is to be understood that, the following drawings illustrate only certain embodiments of the present invention, therefore the restriction to scope it is not construed as, for those of ordinary skill in the art, under the premise not paying creative work, it is also possible to obtain other relevant accompanying drawings according to these accompanying drawings.
Fig. 1 is the structural representation of M93 automobile start guide cylinder in prior art;
The structural representation of the Compound Extrusion drift for processing automobile guiding cylinder that Fig. 2 provides for embodiment of the present invention;
Fig. 3 be in Fig. 2 the A of Compound Extrusion drift to structural representation;
The process chart of the Compound Extrusion processing method of the automobile start guide cylinder that Fig. 4 provides for embodiment of the present invention;
Fig. 5 processes change of shape schematic diagram during automobile start guide cylinder according to Compound Extrusion processing method in Fig. 4.
Figure acceptance of the bid note is respectively as follows:
100-automobile start guide cylinder, 110-internal helix spline, the special-shaped curved die cavity of 120-;
200-Compound Extrusion drift, 210-the first drift, 211-internal helix spline forming section, 212-guide part, 213-round platform;
220-the second drift, the special-shaped curved forming section of 221-, 222-stop part;
230-the first ball bearing, 231-thrust ball bearing, 232-radial ball bearing, 240-the second ball bearing, 250-positioning sleeve, 260-pressure block.
Detailed description of the invention
Consult shown in Fig. 4 and Fig. 5, the Compound Extrusion processing method of a kind of automobile start guide cylinder that the embodiment of the present invention provides, for processing automobile start guide cylinder 100 as shown in Figure 1, the method comprises the following steps:
Saw material; Annealing; Base obtains blank; Ball blast processes with phospholeumization; Just crowded; Jumping-up obtains workpiece; Bore boring fabrication hole; Phospholeumization processes; Special-shaped curved die cavity 120 and internal helix spline 110 Compound Extrusion shape, and obtain automobile start guide cylinder 100;
Wherein special-shaped curved die cavity 120 and internal helix spline 110 Compound Extrusion forming step are to adopt Compound Extrusion drift 200 that the workpiece through phosphorus saponification treatment step is processed, consult shown in Fig. 2 and Fig. 3, Compound Extrusion drift 200 includes the first drift 210 for rotary squeezing processing internal helix spline 110 and the second drift 220 for the working special-shaped curved die cavity 120 of reverse extrusion, first drift 210 and the second drift 220 are coaxially disposed, second drift 220 is set in the top of the first drift 210, first drift 210 can be connected to the second drift 220 around axis relative to what the second drift 220 rotated.
Compound Extrusion drift 200 is combined by the first drift 210 of processing internal helix spline 110 and the second drift 220 of working special-shaped curved die cavity 120, it is possible to a step processing obtains special-shaped curved die cavity 120 and internal helix spline 110. Couple for dynamic cooperation between first drift 210 and the second drift 220, in the process of punching press, first drift 210 can rotate about the axis thereof, rotary squeezing processing internal helix spline 110, second drift 220 does not rotate simultaneously, it is directly opposite the special-shaped curved die cavity 120 of extrusion process, first drift 210 and the second drift 220 carry out each self-corresponding processing work simultaneously, Compound Extrusion drift 200 can a step completes special-shaped curved die cavity 120, internal helix spline 110 shapes in use, it is thus possible to the working (machining) efficiency improving automobile start guide cylinder is high, reduce forging cost.
First drift 210 of Compound Extrusion drift 200 and the second drift 220 are coaxially disposed, it is thus possible to be effectively ensured the special-shaped curved die cavity 120 that obtains of processing and internal helix spline 110 is coaxial, and then ensure the precision of automobile start guide cylinder 100.
The work process of Compound Extrusion drift 200 is: the bottom of Compound Extrusion drift 200 props up blank to be processed, and it is descending that the pressure head of forcing press pushes down this Compound Extrusion drift 200. In the process, first drift 210 and blank interact and start to rotate, processing internal helix spline 110, second drift 220 is directly opposite the extruding special-shaped curved die cavity 120 of punch process on the basis of internal helix spline 110, thus realizing synchronous processing internal helix spline 110 and special-shaped curved die cavity 120.
Further, special-shaped curved die cavity 120 is with internal helix spline 110 Compound Extrusion forming step, and Compound Extrusion drift 200 is installed on forcing press and the axis in Alignment Process hole, and forcing press drives Compound Extrusion drift 200 descending, and workpiece is carried out Compound Extrusion.
At special-shaped curved die cavity 120 with internal helix spline 110 Compound Extrusion forming step, the bottom of Compound Extrusion drift 200 props up blank to be processed, and it is descending that the pressure head of forcing press pushes down Compound Extrusion drift 200. In the process, first drift 210 and blank interact and start to rotate, processing internal helix spline 110, the working special-shaped curved die cavity 120 of the second drift 220 punching press on the basis of internal helix spline 110, thus realizing synchronous processing internal helix spline 110 and special-shaped curved die cavity 120.
Further, the bottom of the first drift 210 is guide part 212, bores in boring fabrication hole step, bores the diameter diameter equal to guide part 212 of the fabrication hole that boring obtains. The preferred diameter of fabrication hole is �� 17mm-�� 19mm.
The diameter of this fabrication hole, equal to the diameter of guide part 212, is slightly less than the internal diameter of internal helix spline 110 part of automobile start guide cylinder 100, therefore simultaneously, guide part 212 may be inserted in fabrication hole, simultaneously, it is simple on the basis of fabrication hole, fabrication hole is carried out internal helix spline 110 to shape.
Further, in special-shaped curved die cavity 120 and internal helix spline 110 Compound Extrusion forming step, when the effective depth of the special-shaped curved die cavity 120 that Compound Extrusion drift 200 extruding is formed is more than 22mm, effective depth refers to the drawing requirement degree of depth of M93 automobile start guide cylinder, obtains automobile start guide cylinder 100.
Further, the process of saw material step is: selecting diameter to be �� 49mm-�� 51mm, material trademark be the hot rolling round bar of 20CrMo, it is carried out saw material, the length controlling every section of saw material is 52mm-53mm.
Further, the process of annealing steps is: heats the saw material through saw material step to 780 DEG C-810 DEG C in stove, is incubated 4-7 hour; Then it is cooled to 690 DEG C-710 DEG C, is incubated 4-7 hour; It is cooled to 280 DEG C-320 DEG C, air cooling of coming out of the stove with stove.
Further, the process of base step is: after heart carrier is contained in an outer nose circle of saw material of annealed step, with top two centre bores that withstand, and rough turn outer nose circle diameter is to �� �� 48.1mm-�� 48.3mm, and by cylindrical chamfer to 2 �� 45 ��; Reverse end for end to be contained in heart carrier another outer nose circle of saw material again, with top two centre bores that withstand, another outer nose circle diameter rough turn is to �� 48.1mm-�� 48.3mm, and by another cylindrical chamfer to 2 �� 45 ��, controlling each outer nose circle length is 51.1mm-51.3mm, obtains blank.
Further, just squeezing in step, forward extrusion is through the blank of ball blast Yu phosphorus saponification treatment step, and the diameter making the upper outer nose circle of blank is �� 48.6mm-�� 48.7mm, and the length of upper outer nose circle is 37.5mm-38mm; The diameter making the lower outer nose circle of blank is �� 34.5mm-�� 34.6mm.
Further, in jumping-up step, by the upper outer nose circle diameter jumping-up of the blank through just squeezing step to �� 59.6mm-�� 59.7mm, obtain workpiece.
Further, Compound Extrusion drift 200 also includes the first ball bearing 230 and the positioning sleeve 250 that are sheathed on the first drift 210, and the first ball bearing 230 and positioning sleeve 250 are respectively positioned in the second drift 220, and positioning sleeve 250 is positioned on the first ball bearing 230.
When the first drift 210 time rotational, the second drift 220 will not rotate, it is achieved the dynamic cooperation between the first drift 210 and the second drift 220 couples. It addition, the end being arranged to make the first drift 210 of positioning sleeve 250 positions, thus preventing the first drift 210 from shaking in the process that punching press rotates and losing efficacy.
Further, the first ball bearing 230 such as includes 1 thrust ball bearing 231 of being arranged in order from the bottom to top and 2 radial ball bearings 232.
The reason that first ball bearing 230 combines in a manner described is: radial ball bearing 232 is used for bearing radial load, 2 radial ball bearings 232 not only take up room less, and ensure that between the first drift 210 with the second drift 220 dynamic coordinate connection effect better, simultaneously, thrust ball bearing 231 is positioned on radial ball bearing 232, thrust ball bearing 231 can carry the forcing press of the top axial compressive force to the first ball bearing 230, it is to avoid the first ball bearing 230 deformation failure.
Further, Compound Extrusion drift 200 also includes the pressure block 260 for pressure-bearing, and pressure block 260 is filled in the second drift 220, and is positioned on the first drift 210.
The pressure block 260 of Compound Extrusion drift 200 is filled between the first drift 210 and the second drift 220, and during work, the pressure head of forcing press pushes down the second drift 220 and pressure block 260, and pressure block 260 is by the pressure transmission born to the first drift 210. The setting of pressure block 260 can not only bearing pressure, and prevent from occurring between the first drift 210 and the second drift 220 moving axially relative, ensure that workpiece can each be forged by the first drift 210 and the second drift 220, and the shaping of special-shaped curved die cavity 120 and internal helix spline 110 meets the requirements.
Further, the face concave shape that pressure block 260 contacts with the second drift 220 circularizes groove, is provided with the second ball bearing 240 in cannelure.
Second ball bearing 240 of Compound Extrusion drift 200 is arranged between pressure block 260 and the second drift 220, therefore, first drift 210 is when around its axial rotation, even if the first drift 210 drives pressure block 260 to there occurs rotation, owing to coordinating connection for dynamic between pressure block 260 with the second drift 220, the second drift 220 without while around axial rotation.
Preferably, the second ball bearing 240 is such as 1 thrust ball bearing 231. Owing to thrust ball bearing 231 can bear axial load, therefore when axial along thrust ball bearing 231 of forcing press, when thrust ball bearing 231 is pressed, thrust ball bearing 231 will not deformation failure, what keep between pressure block 260 and the second drift 220 dynamic coordinates connection.
Further, first drift 210 also includes surface and has the internal helix spline forming section 211 of spiral pattern, guide part 212 and internal helix spline forming section 211 are positioned at outside the second drift 220, guide part 212 is positioned at the bottom of the first drift 210, and the diameter of guide part 212 is less than the diameter of internal helix spline forming section 211.
The guide part 212 of the first drift 210 is positioned at least significant end, for expanding the fabrication hole of blank, makes the internal diameter of fabrication hole be appropriate to internal helix spline 110 and shapes; Internal helix spline forming section 211 is positioned on guide part 212, is used for carrying out internal helix spline 110 and shapes.
Further, the end face of guide part 212 arranges one to be highly 2��3mm, angle is the round platform 213 of 45 ��.
The end face of the guide part 212 of Compound Extrusion drift 200 contacts with blank at first, and therefore, the counteracting force that this end face is subject to is maximum, it is easy to crack. After the end face of guide part 212 arranges the round platform 213 of above-mentioned specification, round platform 213 is subject to the counteracting force of blank, when this reaction force acts is on the taper seat of round platform 213, can produce to point to the component within the first drift 210, constitute the compressive stress pointed within the first drift 210. This component can change the stress state of annular region, effectively solves the generation of guide part 212 end capacity check.
Further, second drift 220 includes stop part 222 and special-shaped curved forming section 221, special-shaped curved forming section 221 is positioned at the bottom of the second drift 220, the external diameter of special-shaped curved forming section 221 is less than the external diameter of stop part 222, and the cross section of special-shaped curved forming section 221 is identical with the cross section of special-shaped curved die cavity 120 to be processed.
The special-shaped curved forming section 221 of the second drift 220 is positioned on internal helix spline forming section 211, carries out special-shaped curved die cavity 120 and shape on the basis at the internal helix spline 110 shaped; Stop part 222 is positioned on special-shaped curved forming section 221, is used for stopping that this Compound Extrusion drift 200 is descending further, thus controlling the degree of depth of special-shaped curved die cavity 120.
Further, the length of special-shaped curved forming section 221 is equal to the degree of depth of the special-shaped curved die cavity 120 of automobile start guide cylinder 100, and the length of stop part 222 is 1 times��1.5 times of the length of special-shaped curved forming section 221.
Work pieces process, equal to the degree of depth of the special-shaped curved die cavity 120 of automobile start guide cylinder to be processed, could be gone out the special-shaped curved die cavity 120 of satisfactory automobile start guide cylinder 100 by the length of special-shaped curved forming section 221. When special-shaped curved forming section 221 fully enters in workpiece, when stop part 222 is all exposed at outside workpiece, namely illustrate that the special-shaped curved die cavity 120 of workpiece machines.
Additionally, the length of stop part 222 is excessive, the whole cost of second drift 220 can be higher, the length of stop part 222 is too small, second drift 220 cannot bear the pressure of forcing press, thus deformation failure, when 1 times��1.5 times of the length that the length of stop part 222 is special-shaped curved forming section 221, the structure of the second drift 220 is the most reasonable.
Below in conjunction with specific embodiment, the Compound Extrusion processing method of M93 automobile start guide cylinder of the present invention is described in further detail.
Embodiment 1
Consulting shown in Fig. 4 and Fig. 5, embodiment 1 provides the Compound Extrusion processing method of a kind of M93 automobile start guide cylinder, and its processing process is:
S101, saw material: selecting diameter to be �� 49mm, material trademark be the hot rolling round bar of 20CrMo, it is carried out saw material, the length controlling every section of saw material is 52mm.
S102, annealing: saw material is heated to 780 DEG C in stove, is incubated 4 hours, is then cooled to 690 DEG C, be incubated 4 hours, be cooled to 280 DEG C with stove, air cooling of coming out of the stove.
S103, base: adopting blank machine base, detailed process is: after heart carrier is contained in cylindrical one end of saw material, with top two centre bores that withstand, this outside diameter rough turn is to �� 48.1mm, and by end-beveling 2 �� 45 ��; Reverse end for end to be contained in heart carrier the cylindrical other end of saw material again, withstand two centre bores with top, rough turn other end outside diameter is to �� 48.1mm, and end-beveling 2 �� 45 ��, controls cylindrical length at 51.1mm, obtains blank.
S104, blank is carried out conventional ball blast process with phospholeumization, to improve blank surface quality, and lubricate.
S105, just crowded: forward extrusion blank, make upper end outside diameter control at �� 48.6mm, upper end cylindrical length controls at 37.5mm; Making lower end outside diameter control at �� 34.5mm, lower end cylindrical length is determined by blank.
S106, jumping-up: make blank upper end outside diameter jumping-up to �� 59.6mm, obtain workpiece.
S107, brill boring fabrication hole: fabrication hole diameter is �� 17mm.
S108, carry out conventional phospholeumization and process boring the workpiece after boring fabrication hole.
Workpiece carries out special-shaped curved die cavity 120 for S109, employing Compound Extrusion drift 200 and internal helix spline 110 Compound Extrusion shapes: be arranged on forcing press by Compound Extrusion drift 200, and it is descending with press ram, workpiece is carried out Compound Extrusion, until special-shaped curved die cavity 120 effective depth that extruding is formed is more than 22mm, finally obtain a kind of M93 automobile start guide cylinder 100.
Wherein, Compound Extrusion drift 200 includes the first drift 210 for rotary squeezing processing internal helix spline 110 and the second drift 220 for the working special-shaped curved die cavity 120 of reverse extrusion, first drift 210 and the second drift 220 are coaxially disposed, second drift 220 is enclosed within the top of the first drift 210, adopting dynamic cooperation to couple between first drift 210 and the second drift 220, the first drift 210 can rotate about the axis thereof. First drift 210 includes guide part 212 and surface has the internal helix spline forming section 211 of spiral pattern, guide part 212 and internal helix spline forming section 211 are positioned at outside the second drift 220, guide part 212 is positioned at the bottom of the first drift 210, and the diameter of guide part 212 is less than the diameter of internal helix spline forming section 211. Second drift 220 includes stop part 222 and special-shaped curved forming section 221, special-shaped curved forming section 221 is positioned at the bottom of the second drift 220, the external diameter of special-shaped curved forming section 221 is less than the external diameter of stop part 222, and the cross section of special-shaped curved forming section 221 is identical with the cross section of special-shaped curved die cavity 120 to be processed.
Embodiment 2
Consulting shown in Fig. 4 and Fig. 5, embodiment 2 provides the Compound Extrusion processing method of a kind of M93 automobile start guide cylinder, and its processing process is:
S201, saw material: selecting diameter to be �� 51mm, material trademark be the hot rolling round bar of 20CrMo, it is carried out saw material, the length controlling every section of saw material is 53mm.
S202, annealing: saw material is heated to 810 DEG C in stove, is incubated 7 hours, is then cooled to 710 DEG C, be incubated 7 hours, be cooled to 320 DEG C with stove, air cooling of coming out of the stove.
S203, base: adopting blank machine base, detailed process is: after heart carrier is contained in cylindrical one end of saw material, with top two centre bores that withstand, this outside diameter rough turn is to �� 48.3mm, and by end-beveling 2 �� 45 ��;Reversing end for end to be contained in heart carrier the cylindrical other end of saw material again, with top two centre bores that withstand, rough turn other end outside diameter is to �� 48.3mm, and end-beveling 2 �� 45 ��, controls cylindrical length at 51.3mm, obtains blank.
S204, blank is carried out conventional ball blast process with phospholeumization, to improve blank surface quality, and lubricate.
S205, just crowded: forward extrusion blank, make upper end outside diameter control at �� 48.7mm, upper end cylindrical length controls at 38mm; Making lower end outside diameter control at �� 34.6mm, lower end cylindrical length is determined by blank.
S206, jumping-up: make blank upper end outside diameter jumping-up to �� 59.7mm, obtain workpiece.
S207, brill boring fabrication hole: fabrication hole diameter is �� 19mm.
S208, carry out conventional phospholeumization and process boring the workpiece after boring fabrication hole.
Workpiece is carried out special-shaped curved die cavity 120 by the Compound Extrusion drift 200 that S209, employing and embodiment 1 are identical and internal helix spline 110 Compound Extrusion shapes: be arranged on forcing press by Compound Extrusion drift 200, and it is descending with press ram, workpiece is carried out Compound Extrusion, until the effective depth of the special-shaped curved die cavity 120 of extruding formation is more than 22mm, finally obtain a kind of M93 automobile start guide cylinder 100.
The foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, for a person skilled in the art, the present invention can have various modifications and variations. All within the spirit and principles in the present invention, any amendment of making, equivalent replacement, improvement etc., should be included within protection scope of the present invention.
Claims (10)
1. the Compound Extrusion processing method of an automobile start guide cylinder, it is characterised in that comprise the following steps:
Saw material; Annealing; Base obtains blank; Ball blast processes with phospholeumization; Just crowded; Jumping-up obtains workpiece; Bore boring fabrication hole; Phospholeumization processes; Special-shaped curved die cavity and internal helix spline Compound Extrusion shape, and obtain automobile start guide cylinder;
Wherein said special-shaped curved die cavity and internal helix spline Compound Extrusion forming step are to adopt Compound Extrusion drift that the described workpiece through described phosphorus saponification treatment step is processed, described Compound Extrusion drift includes the first drift for rotary squeezing processing internal helix spline and the second drift for the working special-shaped curved die cavity of reverse extrusion, described first drift and described second drift are coaxially disposed, described second drift is set in the top of described first drift, and described first drift can be connected to described second drift around axis relative to what described second drift rotated.
2. the Compound Extrusion processing method of automobile start guide cylinder according to claim 1, it is characterized in that, in described special-shaped curved die cavity and internal helix spline Compound Extrusion forming step, described Compound Extrusion drift is installed on forcing press, and the axis in Alignment Process hole, described forcing press drives described Compound Extrusion drift descending, and described workpiece is carried out Compound Extrusion.
3. the Compound Extrusion processing method of automobile start guide cylinder according to claim 1, it is characterised in that the bottom of described first drift is guide part, in described brill boring fabrication hole step, bores the diameter diameter equal to described guide part of the fabrication hole that boring obtains.
4. the Compound Extrusion processing method of automobile start guide cylinder according to claim 3, it is characterised in that the diameter of described fabrication hole is �� 17mm-�� 19mm.
5. the Compound Extrusion processing method of automobile start guide cylinder according to claim 1, it is characterized in that, in described special-shaped curved die cavity and internal helix spline Compound Extrusion forming step, when the effective depth of the described special-shaped curved die cavity that the extruding of described Compound Extrusion drift is formed is more than 22mm, obtain described automobile start guide cylinder.
6. the Compound Extrusion processing method of automobile start guide cylinder according to claim 1, it is characterized in that, the process of described saw material step is: select diameter to be �� 49mm-�� 51mm, material trademark be the hot rolling round bar of 20CrMo, it is carried out saw material, and the length controlling every section of saw material is 52mm-53mm.
7. the Compound Extrusion processing method of automobile start guide cylinder according to claim 1, it is characterised in that the process of described annealing steps is: the described saw material through described saw material step is heated to 780 DEG C-810 DEG C in stove, is incubated 4-7 hour; Then it is cooled to 690 DEG C-710 DEG C, is incubated 4-7 hour; It is cooled to 280 DEG C-320 DEG C, air cooling of coming out of the stove with stove.
8. the Compound Extrusion processing method of automobile start guide cylinder according to claim 1, it is characterized in that, the process of described base step is: be contained in by heart carrier after an outer nose circle of the described saw material of described annealing steps, two centre bores are withstood with top, rough turn described outer nose circle diameter is to �� 48.1mm-�� 48.3mm, and by described cylindrical chamfer to 2 �� 45 ��; Reverse end for end to be contained in heart carrier another outer nose circle of described saw material again, with top two centre bores that withstand, described in rough turn, another outer nose circle diameter is to �� 48.1mm-�� 48.3mm, and by another cylindrical chamfer described to 2 �� 45 ��, controlling each outer nose circle length is 51.1mm-51.3mm, obtains blank.
9. the Compound Extrusion processing method of automobile start guide cylinder according to claim 1, it is characterized in that, in described just crowded step, forward extrusion is through the described blank of described ball blast Yu phosphorus saponification treatment step, the diameter making the upper outer nose circle of described blank is �� 48.6mm-�� 48.7mm, and the length of upper outer nose circle is 37.5mm-38mm; The diameter making the lower outer nose circle of described blank is �� 34.5mm-�� 34.6mm.
10. the Compound Extrusion processing method of automobile start guide cylinder according to claim 1, it is characterized in that, in described jumping-up step, by the upper outer nose circle diameter jumping-up through the described described blank just squeezing step to �� 59.6mm-�� 59.7mm, obtain described workpiece.
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| CN105642803B (en) | 2017-06-27 |
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