2
In order to make the surfaces have better mutual position accuracy and better machining continuity, the machining of multiple surfaces should be completed in one clamping as much as possible. Therefore, firstly, the two end faces are positioned flat with the excircle of the blank, and the excircle 3 is roughly turned. Then locate and process the through hole on the excircle 3, and then pull the hole. Then use φ 30 inner hole to locate and process the rest. V. Arrangement process
The forging diagram is as follows:
Although the structure of this part is simple, the processing technology and positioning and clamping scheme are arranged as follows:
Process number
Being processed
allow
Equipment Name Fixture Name Positioning Scheme Clamping Scheme
00 forging blank 05 flat small end face CA6 140 Three-jaw chuck plane 4 10 roughing outer circle 3 CA6 140 Three-jaw chuck plane 4 15 flat large end face ca 140 Three-jaw chuck outer circle 3 20 drilling center hole CA6 140.
CA6 140 Three-jaw chuck excircle 3 30 broaching hole L6 140 Special fixture 35 Rough turning excircle 4 CA6 140 Three-jaw chuck φ 30 inner hole 40 Rough turning end face 2 CA6 140 Three-jaw chuck φ 30 inner hole 45 Rough turning excircle 3 CA6 140
φ 30 inner hole
50 Milling Tooth X62W 55 Cleaning 60-75 Inspection 80
heat treatment
hardening machine
three
85 storage
VI. Process design 1. See process specification for drawing process flow chart.
2, determine the process size
Process size
Processing scheme
machining allowance
Process size φ 2 1 1 excircle
Coarse spin
six
(See Table 2.44/2.45/2/46 of 3P57/58)
Φ2 1 1
φ 60 excircle
Coarse spin
six
(See Table 2.54/2.56/2.59 of 3P63/65/66)
Φ60
Φ 30 Inner Hole Drilling and Pulling
29 1.035 φ 29 φ 30 tooth profile
factory
Seven, the choice of cutting parameters
According to the selection principle of cutting parameters, cutting parameters should be selected according to the requirements of workpiece material, tool material, machine tool power, process system stiffness and machining accuracy. And on the premise of ensuring the machining quality, make full use of the cutting performance of the tool and the power and torque of the machine tool to obtain high productivity and low machining cost. 1, process 05
The content of this process is to flatten the small end face and ensure that all the end faces are cut off.
1 step, back feed 2mm, feed 0.2mm/r, cutting speed 50m/min 2, machining 10.
The main content of this process is rough turning the excircle 3.
1 step, back feed 4mm, feed 0.2mm/r, cutting speed 50m/min 3, machining 15.
The main content of this process is to flatten the big end face to ensure that all the end faces are cut off.
four
1 step, back feed 2mm, feed 0.2mm/r, cutting speed 50m/min 4, process 20.
The main content of this process is to drill a central hole, using a composite central drill without a protective cone. 5. Process 25
The main content of this process is to drill φ 29 inner hole.
The feed speed of step 1 is 0.4mm/r and the cutting speed is 50m/min, which ensures the connection. 6. Process 30
The main content of this process is hole drawing.
The feed speed of step 1 is 0.02mm/r, the cutting speed is 6m/min 7, and the working procedure is 35.
The main content of this process is rough turning the excircle 4.
1 step, back feed 2mm, feed 0.2mm/r, cutting speed 50m/min 8, process 40.
The main content of this process is roughing the end face 2.
1 step, back feed 2mm, feed 0.2mm/r, cutting speed 50m/min 9, step 45.
The main content of this process is rough turning the excircle 3.
Step 1, back feed 2mm, feed 0.2mm/r, cutting speed 50m/min 10, process 50.
The main contents of this process are cleaning, deburring and chamfering. 1 1, process 55
The main contents of this process are gear milling 12 and process 60-75.
The main content of this process is inspection. Including appearance and size. 13, process 80
The main content of this process is quenching and tempering heat treatment, so that the hardness reaches HRC48-55 14, process 85.
The main content of this process is warehousing.