CN101745593A

CN101745593A - Forging process and tool of dynamometer annulus

Info

Publication number: CN101745593A
Application number: CN200810186046A
Authority: CN
Inventors: 荆江
Original assignee: Tianshui Hongshan Testing Machine Co Ltd
Current assignee: Tianshui Hongshan Testing Machine Co Ltd
Priority date: 2008-12-11
Filing date: 2008-12-11
Publication date: 2010-06-23

Abstract

The invention discloses forging process and tool of a dynamometer annulus and relates to a free forging process, aiming at ensuring that the fiber direction of the internal organization of the dynamometer annulus is consistent with the forced direction of the annulus during working and fiber flows are not cut off so as to improve the force property of the annulus and guarantee the working precision and the long-term stability of the dynamometer. The forging process flow comprises the following steps of: blanking; heating; forging into a flat square shape and pulling out the tail part; heating for a second time; chamfering and punching into an annular body; upsetting; heating for a third time; chambering and pressing into a long round shape; necking and trimming the punched hole to form a required appearance and size; and cooling and annealing. The tool comprises a round drain cap, a flat drain cap and a flat punch. The invention is used for forging and processing the dynamometer annulus.

Description

The Forging Technology of dynamometer annulus and frock thereof

Technical field

The present invention relates to the open die forging Forging Technology and the Forging Technology equipment of forging, specifically is the Forging Technology and the frock thereof of dynamometer annulus.

Background technology

Dynamometer is used for the calibrating and the verification of dynamometry instruments such as Material Testing Machine, forcing press, also is used for the force measurement of other equipment, parts.Precision prescribed height, good stability all have strict demand to relative error of repeatability in the indicating value, indicating value long-time stability, relative tolerance between forward and backward in indicating value, and sensitivity.The blank of existing dynamometer annulus is processed with cutting method, with gas cutting or machine cut processing ring body profile and endoporus, carry out fine finishining again, the shortcoming of this method is: 1. the fibr tissue of blank inside is cut off, interior tissue fiber flow direction and ring body are subjected to force direction inconsistent, stressing conditions is bad, and mechanical performance is significantly reduced, and causes that the dynamometer precision is low, long-time stability are poor; 2. the material cutting output is big, and utilization rate is low, and waste is serious, and machining period is long, has strengthened manufacturing cost, and is less economical.Therefore, this processing method is badly in need of improving.

Summary of the invention

At the defective of now using processing method, for improving the total quality of dynamometer, the invention provides a kind of Forging Technology and special tooling thereof of dynamometer annulus, to overcome the defective of current technology, improve the dynamometer annulus stressing conditions.

The forging of technical scheme dynamometer annulus is forged with the open die forging method on general forging equipment.Technological process is as follows:

1. blanking intercepting forged steel bar is made forging blank for one section;

2. heating heating is carried out in electric furnace, earlier through heating up at a slow speed, be incubated, more fast and be warmed up to initial forging temperature, insulation;

3. the blank pulling that heats of fulling side, be swaged into deltiod, and impression, pull out tail, deflashing;

4. heat for the second time Fast Heating, insulation;

5. chamfered edge, punching are carried out chamfered edge, punching, guard aperture to forging, and forging is body circlewise;

6. jumping-up uses the circle drain cap with the forging jumping-up;

7. heating for the third time is by heating means heating for the second time;

8. reaming, flattening are flattened into Long Circle with the circle drain cap with forging, and endoporus also expands into slotted hole;

9. flatten, repair the hole and make the forging profile reach desired shape and size, and endoporus is repaired with flat drain cap;

10. cooling, annealing, detection.

The used special process of the present invention is equipped for round drain cap, flat drain cap and flat punching pin, and circle drain cap profile is circular, and there is taper hole at the center, and flat drain cap is two sides flats in the arc-shaped, and flat punching pin is that two sides are semicircle, and an end has the flat of convex shoulder.

Beneficial effect is compared with cutting process method, and the present invention has following advantage: 1. it is consistent that ring body internal fiber organizer is subjected to the force direction distribution when working with ring body, and stressing conditions is good, has guaranteed the operating accuracy and the long-time stability of dynamometer; 2. raw materials consumption is few, saves a large amount of raw material, has avoided waste of material; Operation few, reduced machining period, reduced manufacturing cost, improved economy.

Description of drawings

Fig. 1 is a dynamometer annulus Forging Technology general flow chart

Fig. 2 is dynamometer annulus profile and interior tissue fibre flow schematic diagram

Fig. 3 is an A-A sectional drawing among Fig. 2,

Fig. 4 is circle drain cap structural representation

Fig. 5 is flat punching pin master, vertical view

Fig. 6 is flat drain cap master, vertical view

The specific embodiment

The forging of dynamometer annulus is carried out on general forging equipment, carries out with the open die forging method, and its concrete technological process is as follows:

1. blanking intercepting forged steel bar is made forging blank for one section, also available block material;

2. heating places electric furnace to heat the blank that cuts, furnace temperature is 500 ℃ during shove charge, heat at a slow speed with geared-down speed, be warming up to 800-850 ℃, be incubated 10-15 minute, be warming up to the initial forging temperature of steel again with high-grade speed rapidly, be incubated 7-10 minute, temperature stress so that the structural stress that reduces to produce in the heating process and the blank inside and outside temperature difference cause prevents forge crack, the forging of coming out of the stove then;

3. fulling side pulls out the blank that heats, be swaged into deltiod along the axis direction of justifying base, and with round steel bar impression on flat square billet surface, extracts two afterbodys, removes remainder;

4. heating is incubated 5-10 minute, the forging of coming out of the stove directly with quickly heating up to initial forging temperature for the second time;

5. chamfered edge, punching to the forging chamfered edge, with small punch punching on the forging plane, are carried out reaming with parallels earlier again, make forging body circlewise;

6. with the forging jumping-up, each is with one up and down for the circle drain cap with special tooling circle drain cap for jumping-up, and circle drain cap centre bore is enclosed within on forging two afterbodys, and forging middle part jumping-up two afterbodys are constant during forging;

7. heating for the third time is by heating means heating for the second time;

8. flattening, reaming are flattened into Long Circle with the circle drain cap with forging, and the middle part is a straightway, and two is semicircle, carries out the saddle support reaming, and endoporus also expands into Long Circle;

9. flatten, repair aperture and press shoulder to forge, make forging reach desired shape and size, and endoporus is repaired with flat punching pin and flat drain cap.With flat punching pin injection endoporus, hole shape in the finishing withdraws from flat punching pin with flat drain cap then in pressing the shoulder forging process with flat drain cap;

10. cooling, annealing, detection are carried out ash with the ring body forging and are buried cooling, remake annealing in process, with uniform formation, crystal grain thinning, elimination residualinternal stress, improve mechanical performance.

The used special process of the present invention is equipped with round drain cap, flat drain cap and flat punching pin.Circle drain cap (shown in Figure 4) is circular slab, and there is taper hole at the center, and flat drain cap (shown in Figure 6) is the flat of circular arc for two sides, and flat punching pin (shown in Figure 5) is flat semicircle, that an end has convex shoulder for two sides.All frocks are all manufactured with steel plate.

Claims

1. the Forging Technology of a dynamometer annulus is carried out with free method on general forging equipment, it is characterized in that its Forging Technology undertaken by following flow process:

1.. blanking intercepting forged steel bar is made forging blank for one section;

2.. heating heating is carried out in electric furnace, heats up at a slow speed earlier, is incubated, the initial forging temperature that is rapidly heated again, insulation;

3.. the pulling of blank that fulling side heats, be swaged into deltiod, and impression, pull out tail;

4.. heat Fast Heating for the second time, insulation;

5.. chamfered edge, punching are carried out chamfered edge, punching, reaming to forging, make forging body circlewise;

6.. jumping-up uses the circle drain cap with the forging jumping-up;

7.. heating for the third time is by heating means heating for the second time;

8.. reaming, flattening are flattened into Long Circle with the circle drain cap with forging, and endoporus also expands into slotted hole;

9.. flatten, repair the hole and make the forging profile reach desired shape and size, and endoporus is repaired with flat punching pin and flat drain cap;

10.. cooling, annealing, detection.

2. the Forging Technology of dynamometer annulus as claimed in claim 1, the furnace temperature when it is characterized in that heating for the first time during shove charge is 500 ℃.

3. the Forging Technology of dynamometer annulus as claimed in claim 1, when it is characterized in that heating for the first time, low grade is heated to 800-850 ℃ at a slow speed, is incubated 10-15 minute.

4. the Forging Technology of dynamometer annulus as claimed in claim 1, it is characterized in that the circle drain cap forging up and down each with one.

5. the frock that the dynamometer annulus Forging Technology is used is characterized in that used frock is circle drain cap, flat drain cap and flat punching pin.

6. the used frock of dynamometer annulus Forging Technology as claimed in claim 5 is characterized in that circle drain cap profile is circular slab, and there is taper hole at the center.