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Left V Key Planing Diagram Step 5: Rough Planing and Right V Key Planing

LESSON 02: GROOVE, V-PIPE (CONTINUED)

2.2. Straight V-shaped dowel


I. Teaching facilities and equipment

1.1. Teaching aids

Time to complete: 6 periods Previous lesson name:

................................................................ .

Performed from date..................... to date ....................................


Lesson plans, outlines, chalk, projector, drawings, ...

1.2. Equipment, tools, materials


T

T

Name and specifications of the device,

tools; raw materials, consumables

Single

taste

SL

Note

Additional

1

Device






Horizontal planer B665

Female

01

Continued use


7E35 Horizontal Planer

Female

01

Continued use


Planer vise

Female

02

Continued use


Map

Female

01

Continued use


Spare parts for planer

Set

02

Continued use


2

Tool






Marker

Female

02

Continued use


Radio

Female

02

Continued use


Caliper 1/50, L=200

Female

03

Continued use


Wrench set from 8÷24mm

Set

01

Continued use


Ruler 200

Female

02

Continued use


Depth gauge

Female

02

Continued use


V 90 Pin Check Gauge ᵒ

Female

02

Continued use


3

Materials (for 01 student)






Box steel billet 60x45x28

Female

01

Cancel


High speed steel groove planer

Female

01

Cancel


V-groove planer left side

Female

01

Cancel


V-groove planer right edge

Female

01

Cancel


HD50 Oil

Liter

01

Cancel


4

Other





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Left V Key Planing Diagram Step 5: Rough Planing and Right V Key Planing

II. Lesson implementation

2.1. Lesson objectives

After completing this lesson, students will be able to:

+ About knowledge:

- Strengthen the operation of planing steps and V-grooving

- Choose and sharpen the knife to plan the V-shaped dowel

+ About skills:

The knife can be mounted and the machine head slide table can be adjusted to a 450 angle to plane the V-shaped pin to meet technical requirements.

+ About attitude:

- Serious and self-disciplined in the learning process.

- Ensure labor safety and environmental hygiene.

2.2. Lesson content

Rz20

2.2.1. Technical requirements

- Permissible V-pin angle deviation 90 0 ±30´

- The two sides of the V-pin are symmetrical about the center

- Dimensional accuracy reaches level 9 to level 8

- V-pin rib roughness reaches Rz20

- Surface flatness reaches 75% - 80%


2.2.2. Cutting tools

- Rough planing knife and fine planing knife with V-bolt right picture 2.12.



Figure 2.12: Left edge planer

Figure 2.13: Right edge planer

- Rough planing knife and V-shaped fine planing knife left in figure 2.13.

2.2.3. Cutting mode

When performing V-groove milling, select the cutting mode as when performing straight V-groove milling.

2.2.4. Sequence of implementation steps

Step 1: Study the drawing, prepare the blank, mark the V-pin on the blank

- The blank has been machined with 6 sides to the size in the previous exercise.



Figure 2.14: Taking impression of the embryo

- Use colored powder mixed with lubricant or colored chalk, marking stick, template, protractor to mark V-pin according to drawing size on the map table as shown in figure 2.14

Step 2: Fixture and mount the workpiece onto the machine

- Clean the machine table and fixture base, then mount the fixture on the machine table similar to straight V-groove milling.

- Use a dial indicator to check the vise's static jaw is perpendicular to the cutting stroke of the planer head.

- Use a jig to mount the workpiece onto the vise, making sure the mark is higher than the top surface of the vise so that the planer does not cut.

into the vise jaw.


S d

Step 3: Plane the right and left steps

Use the left edge planer and the right edge planer to rough plan and finish plan the right and left step surfaces to the step size in Figure 2.16.

Figure 2.15: Workpiece clamping on vise


n

n

S n

S n

S d

Figure 2.16: Diagram of planing the right and left sides of the workpiece


Step 4: Rough planing and fine planing of the left V-bolt

- Tilt the machine head at a 45 0 angle clockwise, hold the rough planer blade on the left side, leaving about 0.3 to 0.5 mm of excess from the mark. The knife feed process is performed by the vertical slide table on the machine head, rotating manually.

Production

- Adjust the machine similar to rough planing, fine planing the remaining amount to the size according to the marked line.


n

Production

Figure 2.16: Rough planing diagram of left V-pin


n

Figure 2.17: Diagram of finishing V-pin on the left Step 5: Roughing and finishing V-pin on the right

Planing is similar to planing the V-bolt on the left, but when tilting the machine head, we

tilt 45 0 counterclockwise



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Production

Production

Figure 2.18: Rough planing diagram of right V-pin



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Figure 2.19: Right V-bolt finishing diagram


Step 6: Finish

Final check of dimensions before disassembling the product

2.2.5. Types of failures, causes, and prevention


TT

Failure mode

Reason

Prevention

1

V-pin angle is not exactly 90 0

- Get the wrong V-pin mark


- Tilting the machine head at an incorrect 45 0 angle

- Be careful when taking impressions.

- Tilt the machine head at the correct angle, when planing the surface use a template or angle gauge.

to check

Straight dimension not achieved

- Poor measurement operation

- Unskilled in machine adjustment

- Reinforce measurement operations


- Operate the machine proficiently before processing

3

V-pin surface roughness not achieved

- Improper cutting mode

- Dull knife


- Dynamic technology system

- Reselect cutting mode


- Sharpen or replace knife

- Tighten the locking screw for non-linear movements.

progress

4

V-pin not perpendicular to the head face

When the vise is fixed, the vise's static jaws are not perpendicular to the cutting stroke direction of the machine.

When mounting the vise on the machine, use a dial indicator to check that the vise's static jaw is perpendicular to the travel direction.

machine cut

2

2.3. Organizing skill training

1. Detailed drawings

Rz20

Requirement: 1 student/1 product


2. Implementation sequence (implementation process table)

TT Steps to follow Instructions to follow

1 Step 1: Take the V-pin mark on the blank - The blank has been machined on 6 sides to meet the requirements

size 50x28x45.

- Use colored powder mixed with lubricant or colored chalk, marking stick, template, protractor, ruler to mark V-groove according to drawing size on the map table.

2 Step 2: Fixture, mount workpiece onto machine - Clean machine table, fixture base then mount

Mounted on the machine table similar to straight groove milling

- Use a dial indicator to check the static jaws of the square vise.


n

n

S n

S n

S d

S d

Step 3 : Planing the right and left steps

angle with the cutting stroke of the planer head.

- Use a jig to mount the workpiece onto the vise, ensuring that the mark is higher than the top surface of the vise.

Use the left edge planer and the right edge planer to rough plan and finish plan the right and left step surfaces to a width of 20mm and a height of 10mm. Ensure the symmetry of the left and right steps through the center.


n

Production

4 Step 4: Rough planing and fine planing of the left V-bolt

- Tilt the machine head at a 45ᵒ angle clockwise, hold the rough planer blade on the left side, leaving about 0.3 to 0.5 mm of excess from the mark. The knife feed process is performed by the vertical slide table on the machine head, rotating manually.

- Adjust the machine similar to rough planing, fine planing the remaining amount to the size according to the marked line.

Step 5: Rough planing and fine planing of the right V-bolt


n

Planing is similar to planing the left V-pin, but when tilting the machine head, tilt it 45 degrees counterclockwise .

6

Step 6: Finish

- Final check of dimensions

together before removing the product

5

Production

2.4. Self-study guide

(1) Programming the swallow tail pin

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