The anti-workpiece for barrel moulding process of end belt flangeTechnical field
The present invention relates to a kind of metal working process method, particularly the anti-workpiece for barrel moulding process of a kind of end belt flange.
Background technology
The anti-workpiece for barrel traditional molding methods of end belt flange is: first carry out open die forging and be processed into semi-finished product (forging molding of flange), then adopt mach mode deep hole processing, this kind of processing mode stock utilization is low, and production efficiency is low, labour intensity is large, and quality control is difficult.
Summary of the invention
In order to make up above deficiency, the invention provides the anti-workpiece for barrel moulding process of a kind of end belt flange, adopting the end of this technological forming flanged (FLGD) workpiece for barrel precision high, without the need to follow-up machined, save raw material, whole workpiece performance is good, and intensity is high.
The present invention in order to the technical scheme solving its technical problem and adopt is: the anti-workpiece for barrel moulding process of a kind of end belt flange, and its technological process is as follows:
Step one: steel ingot blanking;
Step 2: blank heating: blank is put into furnace temperature and heat lower than the heating furnace of 700 DEG C, be first heated to 750-850 DEG C, insulation 45-90min, then heating furnace heating with full power is to 1170 DEG C-1190 DEG C, is cooled to more than 850 DEG C after insulation 70-90min;
Step 3: mould and die preheating:
By mould and die preheating to 250 DEG C ~ 350 DEG C;
Step 4: blank descales;
Step 5: extruded
A. flange forming: blank is put into counterdie, utilize upsetting flange mold to carry out forward extrusion to blank, extrusion billet makes flange forming;
B. oil cylinder deep hole forming: upsetting flange patrix is replaced by extrusion deep hole patrix drift, substep backward extrusion workpiece, oil cylinder deep hole forming;
C. workpiece is taken out in counterdie;
D. cooling die.
As a further improvement on the present invention, described step 5 oil cylinder deep hole forming step divides five step anti-extrusions.
As a further improvement on the present invention, in described step 5 oil cylinder deep hole forming step, each time after backward extrusion, cooling is carried out to extrusion deep hole patrix and in the endoporus of workpiece, adds sawdust graphite powder simultaneously, and then carry out backward extrusion next time.
As a further improvement on the present invention, described mould and die preheating is put into blank again after lubricating mould after completing and is carried out extruded.
As a further improvement on the present invention, in step 2 in blank heating step, be first heated to 800 DEG C, insulation 60min, then heating furnace heating with full power is to 1170 DEG C-1190 DEG C, is cooled to more than 850 DEG C after insulation 80min.
Advantageous Effects of the present invention is: the mode that the present invention adopts forward extrusion and backward extrusion to combine is to process the anti-workpiece for barrel of end belt flange, save material about 40%, greatly reduce production cost, enhance productivity, grain size number is high, metal streamline is smooth and easy, and product has higher fatigue resistance, high-tensile.
Accompanying drawing explanation
Fig. 1 is the anti-workpiece for barrel structural representation of end belt flange;
Fig. 2 is the blank schematic diagram through step one blanking of the present invention;
Fig. 3 is forward extrusion state principle figure of the present invention;
Fig. 4 is backward extrusion state principle figure of the present invention.
Detailed description of the invention
Embodiment: the anti-workpiece for barrel moulding process of a kind of end belt flange, its technological process is as follows:
Step one: steel ingot blanking;
Step 2: blank heating: blank is put into furnace temperature and heat lower than the heating furnace of 700 DEG C, be first heated to 750-850 DEG C, insulation 45-90min, then heating furnace heating with full power is to 1170 DEG C-1190 DEG C, is cooled to more than 850 DEG C after insulation 70-90min;
Step 3: mould and die preheating:
By mould and die preheating to 250 DEG C ~ 350 DEG C;
Step 4: blank descales;
Step 5: extruded:
A. flange forming: blank is put into counterdie 4, utilize upsetting flange mold 2 pairs of blanks to carry out forward extrusion, extrusion billet makes flange forming;
B. oil cylinder deep hole forming: upsetting flange patrix is replaced by extrusion deep hole patrix drift 3, substep backward extrusion workpiece, oil cylinder deep hole forming;
C. workpiece 1 is taken out in counterdie;
D. cooling die.
Described step 5 oil cylinder deep hole forming step divides five step anti-extrusions.
In described step 5 oil cylinder deep hole forming step, each time after backward extrusion, cooling is carried out to extrusion deep hole patrix and in the endoporus of workpiece, adds sawdust graphite powder simultaneously, and then carry out backward extrusion next time.
Putting into blank after lubricating mould after described mould and die preheating completes again carries out extruded.
In step 2 in blank heating step, be first heated to 800 DEG C, insulation 60min, then heating furnace heating with full power is to 1170 DEG C-1190 DEG C, is cooled to more than 850 DEG C after insulation 80min.