CN104889301A - Large driving wheel hammer forging die and hammer forging process thereof - Google Patents

Abstract

The invention discloses a large driving wheel hammer forging die and a hammer forging process thereof. The hammer forging die comprises an upper die, a lower die, a device hammerhead and a device clamper, the upper die is fastened on the device hammerhead through a wedge and a key, the lower die is fastened on the device clamper through a wedge and a key, an upper die latch, an upper die bin, an upper die outer ring bridge, an upper die cavity, an upper die inner ring bridge, an upper die gross weight storage bin and an upper die striking surface in the upper die are directly machined on the upper die, a lower die latch, a lower die bin, a lower die outer ring bridge, a lower die cavity, a lower die inner ring bridge, a lower die gross weight storage bin and a lower die striking surface in the lower die are also directly correspondingly machined on the lower die, and the upper die and the lower die are guided by the latches. The hammer forging process includes four steps and is convenient to operate and stable in machining quality, the strength of a driving wheel is effectively improved, the service life of the driving wheel is effectively prolonged, batch production is facilitated, and production cost is greatly reduced.

Description

A kind of large-scale driving wheel hammer die forging mould and hammer die forging technique thereof

Technical field

The invention belongs to Forging Technology field, relate to a kind of large-scale driving wheel hammer die forging mould and hammer die forging technique thereof.

Background technology

Driving wheel, is sprocket wheel again, is widely used in construction machinery industry, large-scale driving wheel weight 30 ~ double centner, and diameter 500 ~ 900 millimeters, Fig. 1 is shown in its structural representation.Two driving wheels form one group, and tracked construction equipment relies on the bearing pin engagement of the tooth A of driving wheel and Chain Link to transmit motion walking.Driving wheel production operation operating mode is complicated severe, can bear larger and uneven shock loading at work.And due to except endoporus other position do not carry out machined, so client has higher requirement to the intensity of driving wheel, dimensional accuracy and shape: all tooth A profile tolerance ± 3 millimeter, the residual overlap and the burr that affect use is not allowed after trimming, outline edge-cutting belt shape is regular and width is 25 ± 5 millimeters, in order to allow engineering machinery smooth ride, driving wheel integral planar degree is not more than 3 millimeters.

The manufacturing process of the large-scale driving wheel of current domestic manufacture is casting or setting down technique: it is that intensity is relatively poor that casting technique produces driving wheel weak point, and service life is low, and the manufacturing cycle is relatively long, and quality is relatively poor; Setting down explained hereafter driving wheel weak point is that manufacturing cost is higher, and because each section adopts the connected mode such as bolt, welding to cause complex procedures and poor reliability, service life is low, and quality is unstable, and stock utilization is low, is not suitable for batch production.

In order to ensure large-scale driving wheel intensity and service life, we have developed large-scale driving wheel integrate forging process, because needs once forge shaping on die hammer, cause that the forging mold life-span is low, stock utilization is low, equipment needed thereby tonnage is large, not only easily there is scrimp, the mass defect such as folding, and residual overlap and residual burr are comparatively large, bring larger difficulty to follow-up finishing process, production cost is relatively high.

Summary of the invention

The object of the present invention is to provide a kind of large-scale driving wheel hammer die forging mould and hammer die forging technique thereof: the large-scale driving wheel of hammer die forging solid forging, operation is simple, effectively improves driving wheel intensity and service life.

In order to realize foregoing invention object, the present invention by the following technical solutions: a kind of large-scale driving wheel hammer die forging mould, comprising: upper die and lower die, equipment tup, equipment clamper; Patrix is fastened on equipment tup by chock and key, and counterdie is fastened on equipment clamper by chock and key; Patrix snap close in patrix, patrix storehouse portion, bridge portion, patrix outer ring, upper model cavity, patrix inner ring bridge portion, patrix gross weight storage bin, patrix cushion faces directly process on patrix; Counterdie snap close in counterdie, counterdie storehouse portion, bridge portion, counterdie outer ring, counterdie die cavity, counterdie inner ring bridge portion, counterdie gross weight storage bin, counterdie cushion faces, also direct on counterdie correspondence process; Upper die and lower die are led by snap close.

The invention also discloses a kind of large-scale driving wheel hammer die forging technique, comprise four steps, particular content is as follows:

Step I, tup drives patrix to rise, and is placed on counterdie by middle for the ring-type being heated to 1150 DEG C ~ 1200 DEG C blank;

Step II, tup drives patrix to hurtle down, under the guiding of patrix snap close and counterdie snap close, kinetic energy is applied on the middle blank of ring-type by upper model cavity, make metal upwards model cavity and counterdie cavity filling, unnecessary outer ring blank flows into patrix storehouse portion and counterdie storehouse portion by bridge portion, patrix outer ring and bridge portion, counterdie outer ring, unnecessary inner ring blank flows into patrix gross weight storage bin and counterdie gross weight storage bin by patrix inner ring bridge portion and counterdie inner ring bridge portion, subsequently, tup drives patrix to rise, and completes and once hits;

Step III, after hitting 4 ~ 5 times continuously, use crowbar levers up the blank on counterdie, use aquadag or other lubricant lubrication, after cooling die, blank put well, continue to hit, until patrix cushion faces contacts with counterdie cushion faces, complete and forge, final forging temperature is not less than 950 DEG C;

Step IV, uses crowbar to lever up driving wheel, uses survey tool to detect thickness, is taken away, just complete an impulse stroke after qualified.

Owing to adopting above-described technical scheme, the present invention can reach following beneficial effect:

1) owing to adopting the large-scale driving wheel of hammer die forging solid forging, driving wheel intensity is good, high life.

2) owing to using blank in the middle of ring-type, stock utilization is high, and it is little that equipment needed thereby forges power, and die life is high.

3) by changing patrix teeth portion shape, making driving wheel teeth portion remain burr when excising overlap few, being out of shape little, reducing follow-up polishing trim amount, and by optimizing bridge portion fillet, decrease scrimp, the mass defect such as folding.

4) change traditional casting or the large-scale driving wheel of setting down into hammer die forging solid forging, forming process is simple, and mould structure is novel, easy to operate, steady quality, is convenient to realize batch production, greatly reduces production cost.

Accompanying drawing explanation

Fig. 1 is large-scale driving wheel structure schematic diagram;

Fig. 2 is blank structural representation in the middle of large-scale driving wheel ring-type;

Fig. 3 is the structural representation of a kind of large-scale driving wheel hammer die forging mould of the present invention;

Fig. 4 is the schematic block diagram of hammer die forging technique of the present invention.

Detailed description of the invention

Below in conjunction with accompanying drawing, the present invention will be further described, as shown in Figure 3: a kind of large-scale driving wheel hammer die forging mould, comprising: patrix 1, counterdie 2.Described patrix 1, comprise: patrix snap close 3, patrix storehouse portion 4, bridge portion, patrix outer ring 5, upper model cavity 6, patrix inner ring bridge portion 7, patrix gross weight storage bin 8, patrix cushion faces 9, patrix 1 is connected with the equipment tup C on equipment with key by chock, and patrix snap close 3, patrix storehouse portion 4, bridge portion, patrix outer ring 5, upper model cavity 6, patrix inner ring bridge portion 7, patrix gross weight storage bin 8 and patrix cushion faces 9 directly process on patrix 1.Described counterdie 2, comprise: counterdie snap close 10, counterdie storehouse portion 11, bridge portion, counterdie outer ring 12, counterdie die cavity 13, counterdie inner ring bridge portion 14, counterdie gross weight storage bin 15, counterdie cushion faces 16, counterdie 2 is connected with the equipment clamper D on equipment with key by chock, counterdie snap close 10, counterdie storehouse portion 11, bridge portion, counterdie outer ring 12, counterdie die cavity 13, counterdie inner ring bridge portion 14, counterdie gross weight storage bin 15 and counterdie cushion faces 16 directly on counterdie 2 correspondence process.Patrix 1 and counterdie 2 are led by snap close.

As shown in Figure 4, the invention also discloses a kind of large-scale driving wheel hammer die forging technique, comprise four steps, particular content is as follows:

Step I, tup C drives patrix 1 to rise, and is placed on counterdie 2 by middle for the ring-type being heated to 1150 DEG C ~ 1200 DEG C blank;

Step II, tup C drives patrix 1 to hurtle down, under the guiding of patrix snap close 3 and counterdie snap close 10, kinetic energy is applied on the middle blank of ring-type by upper model cavity 6, upwards model cavity 6 and counterdie die cavity 13 are filled to make metal, unnecessary outer ring blank flows into patrix storehouse portion 4 and counterdie storehouse portion 11 by bridge portion, patrix outer ring 5 and bridge portion, counterdie outer ring 12, unnecessary inner ring blank flows into patrix gross weight storage bin 8 and counterdie gross weight storage bin 15 by patrix inner ring bridge portion 7 and counterdie inner ring bridge portion 14, subsequently, tup C drives patrix 1 to rise, and completes and once hits;

Step III, after hitting 4 ~ 5 times continuously, use crowbar levers up the blank on counterdie 2, use aquadag or other lubricant lubrication, after cooling die, blank put well, continue to hit, until patrix cushion faces 9 contacts with counterdie cushion faces 16, complete and forge, final forging temperature is not less than 950 DEG C;

Step IV, uses crowbar to lever up driving wheel, uses survey tool to detect thickness, is taken away, just complete an impulse stroke after qualified.

Claims (2)

1. a large-scale driving wheel hammer die forging mould, comprising: patrix (1), counterdie (2), equipment tup (C), equipment clamper (D); It is characterized in that: patrix (1) is fastened on equipment tup (C) by chock and key, counterdie (2) is fastened on equipment clamper (D) by chock and key; Patrix snap close (3) in patrix (1), patrix storehouse portion (4), bridge portion, patrix outer ring (5), upper model cavity (6), patrix inner ring bridge portion (7), patrix gross weight storage bin (8), patrix cushion faces (9) directly process on patrix (1); Counterdie snap close (10) in counterdie (2), counterdie storehouse portion (11), bridge portion, counterdie outer ring (12), counterdie die cavity (13), counterdie inner ring bridge portion (14), counterdie gross weight storage bin (15), counterdie cushion faces (16), also directly process in the upper correspondence of counterdie (2); Patrix (1) and counterdie (2) are led by snap close.

2. one according to claim 1 large-scale driving wheel hammer die forging mould, is characterized in that: hammer die forging technique, comprises four steps as follows:

Step I, tup (C) drives patrix (1) to rise, and is placed on counterdie (2) by middle for the ring-type being heated to 1150 DEG C ~ 1200 DEG C blank;

Step II, tup (C) drives patrix (1) to hurtle down, under the guiding of patrix snap close (3) and counterdie snap close (10), kinetic energy is applied on the middle blank of ring-type by upper model cavity (6), upwards model cavity (6) and counterdie die cavity (13) are filled to make metal, unnecessary outer ring blank flows into patrix storehouse portion (4) and counterdie storehouse portion (11) by bridge portion, patrix outer ring (5) and bridge portion, counterdie outer ring (12), unnecessary inner ring blank flows into patrix gross weight storage bin (8) and counterdie gross weight storage bin (15) by patrix inner ring bridge portion (7) and counterdie inner ring bridge portion (14), subsequently, tup (C) drives patrix (1) to rise, complete and once hit,

Step III, after hitting 4 ~ 5 times continuously, use crowbar levers up the blank on counterdie (2), after using aquadag lubricant lubrication, cooling die, blank is put well, continue to hit, until patrix cushion faces (9) contacts with counterdie cushion faces (16), complete and forge, final forging temperature is not less than 950 DEG C;

Step IV, uses crowbar to lever up driving wheel, uses survey tool to detect thickness, is taken away, just complete an impulse stroke after qualified.