Automobile accessory gear wheel continuous die

Abstract

The application discloses a kind of continuous punching die of tooth flower of steam fittings, including the upper die assembly and lower die assembly of the edge cutting, punching, convex, pre-punching, fine punching, reverse R angle, hole extraction, squatting, pre-tooth, cutting, punching tooth, thinning and pressing tooth, reverse bevel, flattening punching, end face chamfer, composite blanking, cutting waste material, and positioning and limiting guide column guide sleeve assembly, the continuous punching die of tooth flower of steam fittings uses thinning, punching, convex, pre-punching, fine punching mode, and the sleeve ring structure of push sleeve ring fitting is punched and formed, and the center hole with high coaxiality is formed;And using two processes of hole extraction and squatting, the internal structure of sleeve ring is fully strengthened, and using high-strength pre-tooth, punching tooth, thinning and pressing tooth process, tooth flower structure is gradually formed, and the bending and shear resistance is excellent;Using reverse R angle, reverse bevel, flattening punching and end face chamfer process gradually ensures precision and design size during the stamping process of push sleeve ring fitting, to ensure that it is formed when it is molded.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of mold equipment, in particular to a continuous punching die for toothed ring of automobile accessory. BACKGROUND

[0002] A kind of push ring accessory for automobile engine shaft end is currently used, referring to Figure 8 And Figure 9 Including positioning disc, center positioning hole and toothed ring around hole, it is used to push the valve spring of shaft journal and does not make it rotate, due to the high-speed reciprocating motion under four-stroke engine, the push force of valve spring that the sleeve ring bears is high-frequency reciprocating extrusion, so the structural strength and bending resistance of the sleeve ring are required higher, based on the technical need of alloy steel material, using casting process forming, the requirement of die is extremely high, the forming difficulty is extremely great;If first casting blank, then necessary center positioning hole and toothed ring structure are processed by milling machine, then, the martensite structure inside toothed ring structure is torn due to milling, its bending and shear resistance is greatly reduced, toothed ring is difficult to withstand extrusion under high-frequency push action, leading to toothed ring fragmentation.The most ideal processing method is still hot forging of alloy steel under high temperature.

[0003] However, the cost of hot forging process is too high, the manufacturing cost of too fine toothed forging cone is high, the production capacity is limited, and the overall energy efficiency is low, in order to improve the technical process, we try to use cold forging process for direct punch forging, based on the existing continuous die process, a continuous die capable of forming positioning disc, center positioning hole and toothed ring structure around hole of the sleeve ring by multiple stamping forming is designed, the high cost and high energy consumption of hot forging process are abandoned, the equipment cost is reduced, and the production capacity is improved. SUMMARY

[0004] The purpose of the present application is to enable the push ring accessory for automobile engine shaft end to be formed into a high-strength alloy steel with high coaxiality center hole, high flatness end face and fine and uniform toothed ring structure with excellent bending and shear resistance, to make up for the high cost, high energy consumption and low production capacity of numerical control milling and high temperature hot forging process, we design and propose a continuous punching die for toothed ring of automobile accessory to reduce equipment and production cost, reduce energy consumption and greatly improve production capacity.

[0005] The technical scheme adopted to solve the above problems is:

[0006] A continuous punching die for toothed ring of automobile accessory, including upper die assembly and lower die assembly for thinning, punching, convex, pre-punching, fine punching, reverse R angle, hole, squat, pre-tooth, edge cutting, tooth punching, thinning tooth pressing, reverse bevel, flat punching, end face chamfering, composite blanking and waste material cutting, and positioning and limiting guide column and guide sleeve assembly,

[0007] The upper die assembly comprises an upper die holder, a thinning punch, a punching punch, a bulging punch, a pre-punching punch, a fine punching punch, a reverse R-angle punch, a hole-drawing punch, a back-squat punch, a pre-tooth punching punch, a trimming punch, a tooth punching punch, a thinning tooth pressing punch, a flattening punching punch, an end-face chamfering punch, a composite blanking punch, a waste cutting punch,

[0008] The lower die assembly comprises a lower die holder, a thinning concave die corresponding to the upper die assembly, a punching concave die, a bulging concave die, a pre-punching concave die, a fine punching concave die, a reverse R-angle concave die, a hole-drawing concave die, a back-squat concave die, a trimming concave die, an inverse bevel concave die, a flattening punching concave die, an end-face chamfering concave die, a composite blanking concave die, a waste cutting concave die,

[0009] The thinning punch thins the fed alloy steel strip, the punching punch punches a center hole in the alloy steel strip, the bulging punch expands the center hole downward to ensure that the alloy steel material around the center hole is extended outward without damaging the metallographic structure of the metal material, the pre-punching punch extrudes a center positioning hole rudiment outward from the center hole, and the fine punching punch precisely punches the center positioning hole rudiment,

[0010] The reverse R-angle punch cooperates with the reverse R-angle concave die to punch a round corner in the connecting groove between the positioning disc and the center positioning hole,

[0011] The hole-drawing punch cooperates with the hole-drawing concave die to draw down and extend the sleeve ring around the center positioning hole, and the back-squat punch cooperates with the back-squat concave die to push and extrude the drawn-down and extended sleeve ring upward, so that the internal metallographic structure of the alloy steel is more flexible, the structural strength is improved, the sleeve ring is formed into a sleeve coaxial with the center positioning hole, and the coaxiality is improved,

[0012] The pre-tooth punching punch punches a rudiment of a toothed structure to be formed on the upper end face of the positioning disc,

[0013] The trimming punch cooperates with the trimming concave die to punch and separate the excess material around the positioning disc,

[0014] The tooth punching punch performs secondary punching on the toothed rudiment structure on the upper end face of the positioning disc to form a toothed structure,

[0015] The thinning tooth pressing punch performs thinning punching on the tooth peak of the toothed structure punched on the upper end face of the positioning disc to accurately form the toothed structure,

[0016] The inverse bevel concave die punches an inverse bevel on the outer periphery of the lower end of the sleeve, and a limiting shaft is pre-inserted into the center positioning hole to ensure that the center positioning hole is not deformed,

[0017] The flattening punching punch cooperates with the flattening punching concave die to punch and flatten the upper and lower end faces of the positioning disc to improve the flatness.

[0018] Further, the end face chamfer male die matches the end face chamfer female die to punch the outer periphery of the positioning disc to form a chamfer.

[0019] Further, the composite blanking male die matches the composite blanking female die to punch the excess material on the outer side of the positioning disc in one time.

[0020] Further, the scrap cutting male die matches the scrap cutting female die to punch the burrs and edges on one side of the positioning disc to form the push-on sleeve ring accessory.

[0021] Further, the back squat female die is provided below with a push-on assembly which pushes up the back squat female die to hold up the lower periphery of the sleeve ring upward, and makes the sleeve ring which is pressed to increase the wall thickness laterally, and fill up the gap between the back squat male die and the back squat female die.

[0022] The beneficial effects of implementing the present application are:

[0023] 1. The continuous punching die for the accessory of the toothed disc of the automobile accessory utilizes the methods of thinning, punching, convexity, pre-punching, and fine punching to punch and form the sleeve ring structure of the push-on sleeve ring accessory, and to form the center hole with high coaxiality;

[0024] 2. The internal structure of the sleeve ring is fully strengthened by using the two processes of hole extraction and back squat, and the toothed disc structure is gradually formed by using the processes of high-strength pre-punching, punching, and thinning, and the bending and shear resistance performance is excellent;

[0025] 3. The processes of R-angle, inverted bevel, flat punching, and end face chamfering are used to gradually ensure the accuracy and design size during the punching process of the push-on sleeve ring accessory, and to ensure that the formed product is obtained after the die is removed. BRIEF DESCRIPTION OF DRAWINGS

[0026] Figure 1 It is a top view of the continuous punching die for the toothed disc of the automobile accessory of the present embodiment;

[0027] Figure 2 It is a front view of the continuous punching die for the toothed disc of the automobile accessory of the present embodiment;

[0028] Figure 3 It is Figure 2 the enlarged view of the middle A;

[0029] Figure 4 It is Figure 2 the enlarged view of the middle B;

[0030] Figure 5 It is Figure 2 the enlarged view of the middle C;

[0031] Figure 6 It is Figure 2 the enlarged view of the middle D;

[0032] Figure 7For Figure 2 Local enlarged view at E in Fig. 1;

[0033] Figure 8 Structure schematic view of the push-on sleeve fitting described in the present embodiment;

[0034] Figure 9 Structure sectional view of the push-on sleeve fitting described in the present embodiment;

[0035] Wherein, 1-thinning, 2-punching, 3-bulging, 4-secondary bulging, 5-pre-punching, 6-fine punching, 7-inverted R angle, 8-hollowing, 9-back squatting, 10-pre-punching, 11-trimming, 12-punching, 13-inverted angle, 14-thinning and pressing, 15-inverted bevel, 16-flattening, 17-secondary punching, 18-end face chamfering, 19-third punching, 20-composite blanking, 21-waste cutting, 22-tooth pattern, 23-center positioning hole, 24-positioning disc, 25-R angle, 26-bevel, 27-sleeve. DETAILED DESCRIPTION

[0036] In order to facilitate the understanding of the present application, the present application will be described more fully below with reference to the related drawings. The preferred embodiments of the present application are shown in the drawings. However, the present application can be implemented in many different forms, and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present application more thorough and comprehensive.

[0037] The present embodiment proposes a continuous punch die for a tooth pattern of a vehicle fitting, comprising an upper die assembly and a lower die assembly for thinning 1, punching 2, bulging 3, pre-punching 52, fine punching 6, inverted R angle 7, hollowing 8, back squatting 9, pre-punching 10, trimming 11, punching 12, thinning and pressing 14, inverted bevel 15, flattening 16, end face chamfering 18, composite blanking 20, and waste cutting 21, and a positioning and limiting guide post and guide sleeve assembly.

[0038] Reference Figure 1 and Figure 2 , the upper die assembly comprises an upper die seat, a thinning 1 punch, a punching 2 punch, a bulging 3 punch, a pre-punching 52 punch, a fine punching 6 punch, an inverted R angle 7 punch, a hollowing 8 punch, a back squatting 9 punch, a pre-punching 10 punch, a trimming 11 punch, a punching 12 punch, a thinning and pressing 14 punch, a flattening 16 punch, an end face chamfering 18 punch, a composite blanking 20 punch, and a waste cutting 21 punch; the lower die assembly comprises a lower die seat, and a thinning 1 recess, a punching 2 recess, a bulging 3 recess, a pre-punching 52 recess, a fine punching 6 recess, an inverted R angle 7 recess, a hollowing 8 recess, a back squatting 9 recess, a trimming 11 recess, an inverted bevel 15 recess, a flattening 16 recess, an end face chamfering 18 recess, a composite blanking 20 recess, and a waste cutting 21 recess corresponding to the upper die assembly.

[0039] Specifically, the thinning 1 punch stamping the fed alloy steel strip, the punching 2 punch punching the alloy steel strip into a center hole, the bulging 3 punch expanding the center hole downward to ensure the outward extension of the alloy steel material outside the center hole without damaging the metallographic structure of the metal material, the pre-punching 52 punch fully extruding the center positioning hole 23 into a rough shape outside the center hole, and the fine punching 6 punch precisely punching the center positioning hole 23 rough shape.

[0040] Referring to Figure 3 and Figure 9 , the inverted R angle 7 punch cooperates with the inverted R angle 7 recess to stamp out the rounded corners of the positioning disc 24 and the connecting groove of the center positioning hole 23.

[0041] Referring to Figure 4 and Figure 5 , the hole 8 punch cooperates with the hole 8 recess to pull down and extend the sleeve ring outside the center positioning hole 23, and the squat 9 punch cooperates with the squat 9 recess to push up and extrude the pulled down and extended sleeve ring, so that the internal metallographic structure of the alloy steel is more flexible, the structural strength is improved, the sleeve ring is formed into a sleeve 27 coaxial with the center positioning hole 23, and the coaxiality is improved.

[0042] Referring to Figure 6 , the pre-tooth 10 punch stamping the upper end face of the positioning disc 24 implements the pre-stamping of the toothed wheel 22 structure into a rough shape.

[0043] The edge 11 punch cooperates with the edge 11 recess to cut and separate the excess material outside the positioning disc 24.

[0044] The tooth 12 punch implements secondary stamping on the toothed wheel 22 structure pre-stamped into a rough shape on the upper end face of the positioning disc 24 to form the toothed wheel 22 structure.

[0045] Referring to Figure 7 , the thinning 14 punch implements thinning 1 on the tooth peak of the toothed wheel 22 structure secondary stamped on the upper end face of the positioning disc 24 to accurately form the toothed wheel 22 structure.

[0046] The inverted bevel 15 recess cooperates with the inverted bevel 15 punch to stamp out the inverted bevel 15 on the lower end of the sleeve 27, and a limiting shaft is pre-inserted into the center positioning hole 23 to ensure that the center positioning hole 23 is not deformed,

[0047] The flat punching 16 punch cooperates with the flat punching 16 recess to stamp the upper and lower end faces of the positioning disc 24 flat to improve the flatness.

[0048] Referring to Figure 9 , the end face chamfer 18 punch cooperates with the end face chamfer 18 recess to stamp out the chamfer 13 on the outer periphery of the positioning disc 24.

[0049] As a further embodiment, the composite blank 20 punch cooperates with the composite blank 20 die to cut the excess material outside the positioning disc 24 in one punch.

[0050] As a further embodiment, the cut waste 21 punch cooperates with the cut waste 21 die to cut the burrs and edges around the periphery of the positioning disc 24 in one punch, thus forming the push-to-fit ring assembly.

[0051] As a further embodiment, the back squat 9 die is provided with a push-up assembly below, which pushes up the back squat 9 die to lift the lower periphery of the ring upward, and makes the squeezed ring increase in wall thickness laterally, and fill the gap between the back squat 9 punch and the back squat 9 die.

[0052] The embodiments of the present application are described in detail above with reference to the accompanying drawings, but the present application is not limited to the above-described embodiments, and various changes, modifications, replacements and variations can be made within the knowledge of those skilled in the art without departing from the spirit of the present application, and the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. A progressive stamping die for automotive parts with toothed patterns, characterized in that: This includes upper and lower die assemblies for performing thinning, punching, convex hulling, pre-punching, fine punching, chamfering, drawing, retraction, pre-toothing, trimming, toothing, thinning and pressing, chamfering, leveling punching, end face chamfering, composite blanking, and scrap cutting, as well as guide post and guide sleeve assemblies for positioning and limiting. The upper die assembly includes an upper die base, a thinning punch, a punching punch, a bulging punch, a pre-punching punch, a fine punching punch, a chamfering punch, a hole-drawing punch, a retraction punch, a pre-toothing punch, a trimming punch, a toothing punch, a thinning and pressing tooth punch, a leveling punching punch, an end face chamfering punch, a composite blanking punch, and a scrap-cutting punch. The thinning punch presses the fed alloy steel strip thinner, the punch punch punches the alloy steel strip out of the center hole, the convex punch expands the center hole downwards, the pre-punching punch fully extrudes outwards from the center hole to form the prototype of the center positioning hole, and the fine punch punch precisely punches the prototype of the center positioning hole. The chamfered R-angle punch, in conjunction with the chamfered R-angle die, punches a rounded corner into the groove connecting the positioning plate and the center positioning hole. The punch and die work together to pull down and extend the collar around the center positioning hole, and the punch and die work together to push the extended collar back up and shape it into a sleeve coaxial with the center positioning hole. The pre-tooth punch is pressed against the upper surface of the positioning plate to pre-press out the preliminary shape of the tooth structure to be formed; The cutting punch, in conjunction with the cutting die, cuts and separates the excess material around the outer periphery of the positioning disk. The punching die performs a secondary punching on the pre-punched tooth pattern on the upper surface of the positioning plate to form the tooth pattern structure. The thinning and pressing punch thins the tooth peaks of the tooth flower structure that is stamped twice on the upper end face of the positioning plate, and precisely forms the tooth flower structure. The leveling punching punch, together with the leveling punching die, punches and levels the upper and lower end faces of the positioning plate. The lower die assembly includes a lower die base and, corresponding to the upper die assembly, a thinning die, a punching die, a convex die, a pre-punching die, a fine punching die, a chamfering die, a hole-drawing die, a back-squatting die, a trimming die, a chamfering die, a leveling punching die, an end face chamfering die, a composite blanking die, and a waste cutting die.

2. The continuous stamping die for automotive parts with toothed patterns according to claim 1, characterized in that: A pusher assembly is provided below the squatting die. The pusher assembly pushes the squatting die upward, lifting the lower circumferential edge of the ring and increasing the wall thickness of the squeezed ring laterally, and filling the gap between the squatting punch and the squatting die.

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