Views: 0 Author: Site Editor Publish Time: 2016-09-01 Origin: Site
Forging of titanium metal blank sheet (excluding) exerting force, make its produce plastic deformation, change the size, shape and improve performance, to manufacturing machinery parts, artifacts, tools or blank forming method.In addition, according to the slider movement way and slide block vertical and horizontal movement (used in slightness piece forging parts, lubrication, cooling and high-speed production forging) mode, compensating device can be used to increase the other direction of movement.This way is different, the forging force, process, material utilization ratio, yield, size tolerance and lubrication cooling way is different, these factors also affect the level of automation.
According to the movement of blank, forging can be divided into free forging, upsetting and extrusion, die forging, closed die forging, closed upset.Closed die forging and closed upset because there is no flash, material utilization ratio is high.With a process or a few process can complete complex forging finishing.Since there is no flash, forging stress area is reduced, the required load is also reduced.However, we should pay attention to not make blank completely is restricted, so we will strictly control the volume, control the relative position of forging die and measure of forgings, effort to reduce the wear and tear of forging die.
According to the movement of the forging die, forging pendulum is rolling, can divide again for rotary forging, roll forging, cross wedge rolling, ring rolling and skew rolling, etc.Pendulum is rolling, forging and ring rolling forging process is also available.In order to improve the utilization rate of material, forging and rolling can be used as a long and thin materials before processing.With the rotation of the free forging forging is also the local forming, its advantage is compared with the size of forging, forging force also can realize form smaller cases.Including free forging, the way of forging and processing the materials from the mold surface near to the free surface extension, therefore, it is difficult to guarantee the accuracy, so will the movement direction of the forging die and spin blacksmith sequence with computer control, a lower forging force are available on complex shape, high precision products, such as the production of many varieties, large size of the turbine blade forgings.
In order to obtain high accuracy should pay attention to prevent overload bottom dead center, control the speed and mould.Because the tolerance, the shape precision of forgings and forging die life.In addition, in order to maintain accuracy, but also should pay attention to adjust the slider guide clearance, ensure rigidity, adjust the bottom dead center and utilization measures of transmission device.
Titanium forging materials are mainly components of pure titanium and titanium alloy, the material of the original state bar, ingot casting, metal powder and liquid metal.Metal in the deformation of the cross-sectional area before and after deformation of the ratio of the cross sectional area called the forging ratio.Correctly choose the forging ratio, reasonable heating temperature and holding time, the reasonable forging temperature and finish forging temperature, reasonable deformation and deformation rate has much to do to improve the product quality, reduce cost.General small and medium-sized forgings are round or square bar as a blank.Bar uniform grain of organization and mechanical properties, good, accurate shape and size, surface quality is good, is advantageous for the organization batch production.As long as reasonable control heating temperature and deformation conditions, do not need large forging deformation can be forged out of the excellent performance of forgings.
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