CN204565029U - A kind of impact forging compound die of low module thin-walled gear ring temperature press forging and forming - Google Patents

Abstract

A compound stamping and forging die for warm stamping and forging of a thin-walled ring gear with a small modulus, including a punch, the punch and the upper die seat of the compound stamping and forging die are fixed, and a ring-shaped blank holder is set on the outer circle of the punch , the die is fixed on the lower die seat of the punching and forging compound die, the lower die that bears the back pressure is installed in the center hole of the die, the outer teeth of the lower die match the inner teeth of the die, and the limit block is installed Between the bottom of the die and the lower die, the position of the lower die in the die is controlled by a limit block. The inner cavity of the die is connected from top to bottom by a stepped hole, a tapered hole, and an inner circular hole. The middle and lower parts of the inner hole are provided with internal teeth, the top of the internal teeth is provided with a first bevel, the bottom of the lower die is provided with a shaft shoulder, and the shaft shoulder cooperates with the limit block. The second bevel is provided, and the forming process of the utility model is adopted, first fine blanking, then punching and forging composite forming, the process is simple and reliable, and easy to realize, the punching and forging composite mold has the advantages of high material utilization rate and high production efficiency.

Description

A Stamping and Forging Composite Die for Warm Stamping and Forging Forming of Small Modulus Thin-walled Ring Gear

technical field

The utility model relates to the technical field of ring gear production, in particular to a punching and forging composite mold for warm punching and forging of a thin-walled ring gear with a small modulus.

Background technique

At present, the technological process of gear rings at home and abroad is generally: blanking - heating - blank forging - blank detection - quenching and tempering treatment - lathe processing - hobbing - drilling - quenching treatment - flaw detection - High temperature tempering - testing - packaging, its disadvantages are that the process flow is too cumbersome, the processing time is long, and the manufacturing cost is high.

Contents of the invention

In order to overcome the shortcomings of the above-mentioned prior art, the purpose of this utility model is to provide a small modulus thin-walled ring gear warm punching forging compound mold, the process flow is simple and reliable, easy to realize, high material utilization rate, production efficiency high.

In order to achieve the above object, the technical scheme that the utility model takes is:

A punching and forging composite die for warm punching and forging of a thin-walled ring gear with a small modulus, including a punch 5, the punch 5 and the upper die seat of the punching and forging composite die are fixed, and ring-shaped edge-holding devices 9 are set on the punch 5 On the outer circle of the die 6, the die 6 is fixed on the lower die seat of the punching and forging compound die, the lower die 7 bearing the back pressure P is installed in the center hole of the die 6, the outer teeth 7b of the lower die 7 and the die The internal teeth 6e of 6 cooperate, and the limit block 8 is installed between the bottom of the die 6 and the lower die 7, and the position of the lower die 7 in the die 6 is controlled by the limit block 8.

Described die 6, its inner cavity is connected from top to bottom by step hole 6a, tapered hole 6b, inner circular hole 6c, and the middle and lower part of inner circular hole 6c is provided with internal tooth 6e, and the top of internal tooth 6e A first bevel 6d is provided.

The bottom of the lower die 7 is provided with a shoulder 7c, the shoulder 7c cooperates with the limit block 8, the outer tooth 7b is arranged on the outside of the lower die 7, and the second bevel 7a is arranged on the top of the outer tooth 7b.

Adopting the forming process of the utility model, the fine blanking is firstly performed, and then the compound forming is performed by punching and forging. The lower top die with back pressure is used to realize the precise control of the workpiece size and the instant demoulding after forming. The process is simple and reliable, and easy to realize. Composite molds have the advantages of high material utilization and high production efficiency.

Description of drawings

Fig. 1 is a forming process diagram of the utility model.

Fig. 2 is a schematic diagram before the forming of the composite die for punching and forging of the present invention begins.

Fig. 3 is a schematic diagram of the completion of drawing and flanging of the punching and forging composite die of the utility model.

Fig. 4 is a schematic diagram of the completion of upsetting of the composite die for punching and forging of the present invention.

Fig. 5 is a schematic diagram of the completion of extrusion of the punching and forging compound die of the utility model.

Fig. 6 is a schematic diagram of the die of the utility model.

Fig. 7 is a schematic diagram of the lower die of the utility model.

Detailed ways

Below in conjunction with accompanying drawing, the utility model is described in detail.

Referring to Fig. 1, Fig. 2, Fig. 3, Fig. 4, Fig. 5, Fig. 6 and Fig. 7, a small modulus thin-wall ring gear warm stamping forging forming process includes the following steps:

In the first step, a circular blank 1 with a round hole in the center is obtained by precision blanking,

In the second step, the annular blank 1 is heated to 800°C and immediately transferred to the punching compound die for forming, and the punch 5 with the edge-holding device 9 is pressed down, and the annular blank 1 is first drawn in the die 6 The deep flanging becomes the deep-drawn flanging part 2, and the punch 5 with the blanking device 9 continues to press down, and the deep-drawing flanged part 2 is formed on the punch 5 with the blanking device 9, the die 6 and the belt back pressure. The closed mold cavity formed by the lower top mold 7 of P is upset into an upsetting piece 3 with a thicker wall thickness. 7 Down, the punch 5 with the blank holder 9 continues to press down, and the upsetting part 3 is extruded into a ring gear under the joint action of the die 6 with internal teeth 6e and the lower die 7 with back pressure P 4. After the forming is completed, the punch 5 with the blank holder 9 moves upward, and the lower top mold 7 ejects the ring gear part 4 from the die 6. If the ring gear part 4 is set on the punch 5, it will pass through the blank holder 9 remove,

The third step is to post-process the ring gear 4 .

With reference to Fig. 2, Fig. 3, Fig. 4 and Fig. 5, described stamping and forging compound mold comprises punch 5, and punch 5 and the upper mold seat of stamping and forging compound mold are fixed, and ring-shaped edge-holding device 9 is sleeved on the punch On the outer circle of 5, it moves together with the punch 5, the die 6 is fixed on the lower mold seat of the punching and forging compound die, the lower die 7 bearing the back pressure P is installed in the center hole of the die 6, and the lower die 6 The outer teeth 7b of 7 are matched with the inner teeth 6e of the die 6, the limit block 8 is installed between the bottom of the die 6 and the lower top die 7, and the lower die 7 is controlled in the die 6 by the limit block 8 s position.

With reference to Fig. 6, described concave die 6, its inner cavity is connected from top to bottom by step hole 6a, tapered hole 6b, inner circular hole 6c, and the middle and lower part of inner circular hole 6c is provided with internal tooth 6e, and inner The top of the tooth 6e is provided with a first bevel 6d, the stepped hole 6a is used for positioning the blank, the tapered hole 6b and the punch 5 cooperate to draw the flanging blank, and the inner circular hole 6c is closed with the punch 5 and the lower top mold 7 The die cavity is used for upsetting the billet, the first bevel 6d is beneficial for the billet to flow into the tooth cavity, and the inner teeth 6e cooperate with the outer teeth 7b of the punch 5 and the lower top die 7 to forwardly extrude the billet into the ring gear 4 .

Referring to Fig. 7 , the bottom of the lower top mold 7 is provided with a shoulder 7c, and the shoulder 7c cooperates with the limit block 8, and the outside of the lower top mold 7 is provided with an external tooth 7b, and the top of the external tooth 7b is provided with a second bevel 7a , the second bevel angle 7a facilitates the billet to flow into the tooth chamber, the outer teeth 7b cooperate with the punch 5 with the blank holder 9, the inner teeth 6e of the die 6 to extrude the billet into the ring gear 4, the shoulder 7c and the limiting The position block 8 cooperates to limit the position of the top mold 7 in the die 6 .

Claims (1)

1. the impact forging compound die of a low module thin-walled gear ring temperature press forging and forming, comprise punch (5), it is characterized in that: the upper bolster of punch (5) and impact forging compound die is fixed, the flange fixing installation (9) of ring-type is enclosed within the cylindrical of punch (5), die (6) is fixed on the die shoe of impact forging compound die, the lower backform (7) bearing back pressure P is contained in the centre bore of die (6), the external tooth (7b) of lower backform (7) and the internal tooth (6e) of die (6) match, limited block (8) is arranged on below die (6) and between lower backform (7), the lower position of backform (7) in die (6) is controlled by limited block (8),

Described die (6), its inner chamber is from top to bottom formed by connecting by stepped hole (6a), bellmouth (6b), interior circular hole (6c), the middle and lower part of interior circular hole (6c) is provided with internal tooth (6e), and the top of internal tooth (6e) is provided with the first oblique angle (6d);

Described lower backform (7) bottom is provided with the shaft shoulder (7c), the shaft shoulder (7c) and limited block (8) coordinate, lower backform (7) outside is provided with external tooth (7b), and external tooth (7b) top is provided with the second oblique angle (7a).