CN206028629U

CN206028629U - Forge gear module

Info

Publication number: CN206028629U
Application number: CN201620929950.7U
Authority: CN
Inventors: 戴风林
Original assignee: Individual
Current assignee: Individual
Priority date: 2016-08-23
Filing date: 2016-08-23
Publication date: 2017-03-22
Anticipated expiration: 2026-08-23

Abstract

The utility model discloses a cover forge gear module, include gear blank mould, first forging die, finisher and draw the optical mode. The advantage that this mould possesses does: fast, the forging process of the first forging die of gear process, two sets of moulds of finisher is forged in disposable heating, and the very long course of working of gear -hobbing machine has just been accomplished to several minutes short time. Save steel, save 20% steel than cutting process. Saving of process follows traditional processing technology to compare, has saved turning process and gear hobbing process, has reduced the energy consumption, has improved production efficiency. The metallography structural integrity of forging the gear is reasonable, and bending strength is high, long service life. Forge the gear and solved the undercut difficult problem of big modulus, small diameter gear.

Description

Forging gear die

Technical field

This utility model is related to a kind of forging straight-tooth gear forging mold, belongs to and leads without cutting metal Machining Technology Domain.

Background technology

Involute cylindrical gear is using a kind of extremely wide part in machine driving, with rapidly sending out for the modern industry Exhibition, how rational design gear processing technique, effectively improve gear precision and production efficiency become in the industry one it is important Research topic.

The technique of production gear is mainly：1. wheel blank forged, 2. rough turn, 3. normalizing, 4. smart car, 5. gear hobbing, 6. at heat Manage, 7. roll flute, 8. grinding out, 9. check, 10. put in storage.This ten procedure is indispensable in current processing technique, and this ten Procedure intricate operation and time-consuming longer.

The most important step of Gear Processing is exactly profile of tooth molding i.e. the 5th step in above-mentioned technique, the current institute of the step The method that can be adopted mainly has three kinds：1. milling machine mill teeth, digital-to-analogue milling cutter mill teeth；2. gear-hobbing machine gear hobbing；3. gear shapping machine gear shaping；This three It is all the physics machining for adopting to plant technique, so larger to the cutter loss ratio of process equipment.Additionally, due to working angles Middle metallic fiber can be cut off so as to cause the strength of gear teeth and service life to reduce.I was declared respectively at 1993 and 1996 " a kind of gear machining equipment " and " Hot-rolling-gear machine ", Hot-rolling-gear machine quickly can be rolled into gear forging stock, but deposit In inevitable quality problems：The middle part of passive wheel gear can produce recessing phenomenon, and this recessing phenomenon is in the later stage Cannot save in processing.

Jing retrievals find, not it has been proposed that reasonable solution is substituting above-mentioned biography in current technology document System processing technique.

Utility model content

This utility model proposes the straight-tooth that a kind of technique simplifies, speed of production is fast for defect present in prior art Gear forging technique.

For realizing the technical purpose of the above, this utility model will take following technical scheme：

A kind of forging straight-tooth gear technique, is carried out in accordance with the following steps：

The first step, forges first gear embryo, determines the size of gear steel blank according to target gear, and blanking post-heating is extremely 1150 ± 50 DEG C, insert after jumping-up and forge full die cavity in wheel blank mould and obtain first gear base, first gear base is immediately fed into First forging die, now wheel blank temperature is 950 ± 50 DEG C；

Second step, obtains second gear base, and first gear base is rushed to its port of export along first forging die mold cavity inlet end Pressure, becomes second gear base when first gear base reaches the just forging die port of export, and second gear base temperature is 850 ± 50 DEG C；

3rd step, obtains the 3rd wheel blank, and the second gear base being stamped to the first forging die port of export continues by downward punching press After entering finisher, finisher is removed from first forging die bottom and process tied to the wheel blank clout at finisher two ends obtain 3rd wheel blank is taken out air cooling by three wheel blanks, and during taking-up, the 3rd wheel blank temperature is 700 ± 50 DEG C；

4th step, obtains finished gear base, when the 3rd wheel blank temperature drops to 500 ± 50 DEG C, by wheel blank punching press Jing Cross drawing optical mode and obtain finished gear base.

The technical scheme that the technique is further limited as：

Further, technique is carried out in accordance with the following steps：The first step, forges first gear embryo, is determined according to target gear The size of gear steel blank, blanking post-heating are inserted to 1100 DEG C, after jumping-up and forge full die cavity in wheel blank mould and obtain the first tooth First gear base is immediately fed into just forging die by wheel blank, and now wheel blank temperature is 900 DEG C；

Second step, obtains second gear base, and first gear base is rushed to its port of export along first forging die mold cavity inlet end Pressure, becomes second gear base when first gear base reaches the just forging die port of export, and second gear base temperature is 800 DEG C；

3rd step, obtains the 3rd wheel blank, and the second gear base being stamped to the first forging die port of export continues by downward punching press After entering finisher, finisher is removed from first forging die bottom and process tied to the wheel blank clout at finisher two ends obtain 3rd wheel blank is taken out air cooling by three wheel blanks, and during taking-up, the 3rd wheel blank temperature is 650 DEG C；

4th step, obtains finished gear base, when the 3rd wheel blank temperature drops to 450 DEG C, by wheel blank punching press through drawing Optical mode obtains finished gear base.

Further, technique is carried out in accordance with the following steps：The first step, forges first gear embryo, is determined according to target gear The size of gear steel blank, blanking post-heating are inserted to 1150 DEG C, after jumping-up and forge full die cavity in wheel blank mould and obtain the first tooth First gear base is immediately fed into just forging die by wheel blank, and now wheel blank temperature is 950 DEG C；

Second step, obtains second gear base, and first gear base is rushed to its port of export along first forging die mold cavity inlet end Pressure, becomes second gear base when first gear base reaches the just forging die port of export, and second gear base temperature is 850 DEG C；

3rd step, obtains the 3rd wheel blank, and the second gear base being stamped to the first forging die port of export continues by downward punching press After entering finisher, finisher is removed from first forging die bottom and process tied to the wheel blank clout at finisher two ends obtain 3rd wheel blank is taken out air cooling by three wheel blanks, and during taking-up, the 3rd wheel blank temperature is 700 DEG C；

4th step, obtains finished gear base, when the 3rd wheel blank temperature drops to 500 DEG C, by wheel blank punching press through drawing Optical mode obtains finished gear base.

Further, technique is carried out in accordance with the following steps：The first step, forges first gear embryo, is determined according to target gear The size of gear steel blank, blanking post-heating are inserted to 1200 DEG C, after jumping-up and forge full die cavity in wheel blank mould and obtain the first tooth First gear base is immediately fed into just forging die by wheel blank, and now wheel blank temperature is 1000 DEG C；

Second step, obtains second gear base, and first gear base is rushed to its port of export along first forging die mold cavity inlet end Pressure, becomes second gear base when first gear base reaches the just forging die port of export, and second gear base temperature is 900 DEG C；

3rd step, obtains the 3rd wheel blank, and the second gear base being stamped to the first forging die port of export continues by downward punching press After entering finisher, finisher is removed from first forging die bottom and process tied to the wheel blank clout at finisher two ends obtain 3rd wheel blank is taken out air cooling by three wheel blanks, and during taking-up, the 3rd wheel blank temperature is 750 DEG C；

4th step, obtains finished gear base, when the 3rd wheel blank temperature drops to 550 DEG C, by wheel blank punching press through drawing Optical mode obtains finished gear base.

A set of forging straight-tooth gear mould, including gear mold, first forging die, finisher and draws optical mode, the just die cavity of forging die It is divided into tilting section and profiled section, Internal periphery and the second gear base plane projected shape one of profiled section from arrival end to the port of export Cause；

The Internal periphery of tilting section is mainly by the cutting edge for standing in just forging die arrival end in face of first gear base approach axis order Section and transition, the wherein end face of cutting edge section are herringbone cutting edge, the bottom surface of cutting edge section and the initial end surface shape one of transition Cause, the initial end face of transition is a rectangle like face with the curved wall of curtain wall as one side, the horizontal edge in rectangle like face Wide with profiled section Internal periphery tooth top width, the vertical edge in rectangle like face is identical with the height in profiled section Internal periphery section；Transition End face is consistent with the Internal periphery of profiled section；Pass through arc between the vertical edge of the initial end face of vertical edge and transition of transition end face Shape curved surface is in smoothing junction, by unilateral connection between the horizontal edge of the initial end face of horizontal edge and transition of transition end face；Finish-forging Mould is fixed on the port of export of just forging die by alignment pin, and leaves certain interval between finisher and first forging die；The profiled section Structure is somewhat similarly to plain chisel, is deformed which by extruding progressively.

The die cavity profile of finisher is consistent with the profiled section of first forging die；

The die cavity profile cooling amount of contraction bigger than the size of finished gear base plane projection of optical mode, the cooling is drawn to receive Contracting amount refer to finished gear base from drop to room temperature for 500 ± 50 DEG C when a size reduction amount.

The technical scheme that the mould is further limited as：

Further, gear mold is mainly made up of the external mold of internal model and socket internal model, and the bottom of external mold is provided with a loudspeaker Shape interface, the side of internal model are provided with the slope being adapted with external mold bottom interface, when external mold is plugged into the pre- of internal model When determining station, the side of the top surface and external mold of internal model cooperates the inner chamber for surrounding gear mold.

Further, the top surface of internal model is provided with the locating core for forging locating slot on first gear base.

Further, the die cavity profile arrival end of optical mode is drawn to be provided with a slope mouth for facilitating wheel blank to enter.

Further, guide lid is just stamped on the arrival end of forging die, and guide covers and is provided with the circle concentric with first forging die entrance Hole, and the diameter of the circular hole is suitable with first gear base diameter.

This utility model is had the advantage that due to taking above technical scheme：

1st, steady quality, mould production gear quality are stable.

2nd, speed is fast, and one-time heating forges gear through first forging die, the forging process of two mold of finisher, short several Minutes just complete the very long course of processing of gear-hobbing machine, and its process velocity is than the fast Radix Achyranthis Bidentatae of gear-hobbing machine.

3rd, steel are saved, 20% steel are saved than machining.

4th, the saving of operation, compares with conventional machining process, saves cylindrical turning process and gear hobbing operation, reduces energy Consumption, improves production efficiency.

5th, forge the structure of gear completely rationally, bending strength is high, long service life.

6th, gear solves large modulus, the root of small diameter gear cuts a difficult problem for forging.

Description of the drawings

Fig. 1 is the structural representation of gear mold；

Fig. 2 is the structural representation of first gear base；

Fig. 3 is the top view of Fig. 2；

Fig. 4 is punching press rod structural representation；

Fig. 5 is mould general assembly drawing；

Fig. 6 is the overlooking the structure diagram of just forging die；

Fig. 7 is to draw optical mode structural representation.

In figure：Punching press rod 1, first gear base 2, guide lid 3, just forging die 4, alignment pin 5, finisher 6, external mold 7, internal model 8.

Specific embodiment

Accompanying drawing discloses the schematic diagram of preferred embodiment involved by this utility model without limitation；Below with reference to accompanying drawing Explain the technical solution of the utility model.

With modulus as 3, the number of teeth is 30 to this utility model, and pressure angle is the forging molding of 20 ° of standard straight spur geer As a example by, finished gear base tip diameter 96mm, root diameter 82.5mm, reference diameter 90mm, facewidth 30mm.

Forging straight-tooth gear technique, is carried out in accordance with the following steps：

The first step, forges first gear embryo, and pinion steel blank material is 20Cr2Ni4, and specification is 60 round steel of Φ, and blanking is long Degree 78mm, weight 1.73kg, blanking post-heating insert wheel blank mould (structure and size such as Fig. 1) to 1150 ± 50 DEG C, after jumping-up In forge full die cavity and obtain first gear base, first gear base (structure and size such as Fig. 2) is immediately fed into into just forging die, now tooth Wheel blank surface temperature is 950 ± 50 DEG C；

A set of forging straight-tooth gear mould, including gear mold, first forging die 4, finisher 6 and drawing optical mode, just forging die (employing 3Cr2W8V heated die steels) arrival end on be stamped guide lid 3, guide covers and is provided with the circular hole concentric with first forging die entrance, and should The diameter of circular hole is suitable with first gear base diameter.

Just the die cavity of forging die is as shown in fig. 6, be divided into tilting section and profiled section, the lubrication groove of profiled section from arrival end to the port of export It is wide consistent with second gear base plane projected shape；

The Internal periphery of tilting section is mainly by the cutting edge for standing in just forging die arrival end in face of first gear base approach axis order Section and transition, the wherein end face of cutting edge section are herringbone cutting edge, the bottom surface of cutting edge section and the initial end surface shape one of transition Cause, the initial end face of transition is a rectangle like face with the curved wall of curtain wall as one side, the horizontal edge in rectangle like face Wide with profiled section Internal periphery tooth top width, the vertical edge in rectangle like face is identical with the height in profiled section Internal periphery section；Transition End face is consistent with the Internal periphery of profiled section；Pass through arc between the vertical edge of the initial end face of vertical edge and transition of transition end face Shape curved surface is in smoothing junction, by unilateral connection between the horizontal edge of the initial end face of horizontal edge and transition of transition end face；Finish-forging Mould is fixed on the port of export of just forging die by alignment pin, and leaves certain interval between finisher and first forging die；

Optical mode size and structure are drawn as shown in fig. 7, a die cavity profile drop bigger than the size of finished gear base plane projection Warm amount of contraction, amount of contraction of lowering the temperature refer to finished gear base from drop to room temperature for 500 ± 50 DEG C when a size reduction amount, die cavity profile Arrival end is provided with a slope mouth for facilitating wheel blank to enter.

The size and structure of gear mold as shown in figure 1, the main external mold 7 by internal model 8 and socket internal model is constituted, external mold Bottom is provided with a horn-like interface, and the side of the internal model is provided with the slope being adapted with external mold bottom interface, when When external mold is plugged into the predetermined station of internal model, the side of the top surface and external mold of internal model cooperates the inner chamber for surrounding gear mold. The top surface of internal model is provided with the locating core for forging first gear base upper Positioning holes.

Claims

1. a set of forging gear die, including gear mold, first forging die, finisher and draws optical mode, it is characterised in that described just to forge The die cavity of mould is divided into tilting section and profiled section, Internal periphery and the second gear base plane of the profiled section from arrival end to the port of export Projection of shape is consistent；

The Internal periphery of the tilting section is mainly by the cutting edge for standing in just forging die arrival end in face of first gear base approach axis order Section and transition, the wherein end face of cutting edge section are herringbone cutting edge, the bottom surface of the cutting edge section and the initial end face shape of transition Shape is consistent, and the initial end face of transition is a rectangle like face with the curved wall of curtain wall as one side, the rectangle like The horizontal edge in face is wide with profiled section Internal periphery tooth top width, the vertical edge in the rectangle like face and the high phase in profiled section Internal periphery section Together；The end face of transition is consistent with the Internal periphery of profiled section；The vertical edge of transition end face is perpendicular with the initial end face of transition It is in smoothing junction by arc-shaped curved surface between side, pass through piece between the horizontal edge of the initial end face of horizontal edge and transition of transition end face Face connects；The finisher is fixed on the port of export of just forging die by alignment pin, and leaves one between finisher and first forging die Fixed gap；

The die cavity profile of the finisher is consistent with the profiled section of first forging die；

The die cavity profile cooling amount of contraction bigger than the size of finished gear base plane projection of the drawing optical mode, the cooling are received Contracting amount refer to finished gear base from drop to room temperature for 500 ± 50 DEG C when a size reduction amount.

2. forging gear die according to claim 1, it is characterised in that gear mold is mainly by internal model and socket internal model External mold composition, the bottom of the external mold is provided with a horn-like interface, and the side of the internal model is provided with is inserted with external mold bottom The slope that interface is adapted, when external mold is plugged into the predetermined station of internal model, the side of the top surface and external mold of internal model is mutually assisted Surround the inner chamber of gear mold.

3. forging gear die according to claim 2, it is characterised in that the top surface of internal model is provided with for forging first The locating core of locating slot on wheel blank.

4. forging gear die according to claim 1, it is characterised in that the die cavity profile arrival end of the drawing optical mode sets There is a slope mouth for facilitating wheel blank to enter.

5. forging gear die according to claim 1, it is characterised in that be just stamped guide lid on the arrival end of forging die, The guide covers and is provided with the circular hole concentric with first forging die entrance, and the diameter of the circular hole is suitable with first gear base diameter.