CN104236411A - Simple turning tool protractor - Google Patents

Abstract

The invention discloses a simple turning tool protractor, which comprises a base ruler, a rotary ruler and a sliding ruler. The base ruler is L-shaped, divided into a horizontal end and a vertical end, and a fan-shaped dial is arranged at its corner. The rotary ruler is L-shaped, and its corner is downwards, and is connected with the circle center of the fan-shaped dial in rotation. An arc-shaped chute is arranged in the fan-shaped dial, and a pointer is installed on the dial. The boss of the pointer is embedded in the arc-shaped chute and connected to one end of the rotary ruler. Shaped chute slides. The sliding rule is L-shaped, one end of which is parallel to the horizontal end of the base ruler, and the other end is slidably connected to the vertical end of the base ruler, and the base ruler and the sliding rule form an F-shaped whole. Beneficial effects of the present invention: in the same two-dimensional plane, five basic turning tool angles can be measured, and all of them can be directly obtained turning tool angles, improving measurement efficiency, simple structure, scientific measuring method, and low cost. It has good teaching effect.

Description

A Simple Turning Tool Protractor

technical field

The invention relates to a teaching aid, in particular to a simple turning tool protractor which can facilitate classroom turning tool angle measurement teaching and improve teaching efficiency.

Background technique

There are many kinds of universal angle measuring instruments on the market, but most of them have many parts and relatively simple measurement methods. Some professional turning tool measuring tools even cost thousands of yuan, and the price is relatively expensive. Classroom teaching pays attention to teaching efficiency and consideration of students' acceptance, and how to make mechanical students better understand the definition of turning tool angle and quickly measure the corresponding angle of turning tool. Ordinary protractors have many parts, and the measurement process needs to be disassembled and reassembled continuously in order to measure other angles of the turning tool. This has brought a lot of trouble to the students who have just learned the knowledge of the turning tool angle. According to the teaching survey, many teachers and students reported that because the turning tool angle is relatively abstract, the corresponding spatial structure must be continuously established in the learning process to imagine the corresponding angle of the turning tool. Location. When students use ordinary protractors to measure the angle of the turning tool, it usually takes more than an hour to measure one or two basic angles of the turning tool. The teaching is time-consuming and labor-intensive.

Contents of the invention

The purpose of the present invention is to overcome the deficiencies of the prior art, and provide a simple turning tool protractor that can facilitate the teaching of turning tool angle measurement in classrooms and improve teaching efficiency.

A simple protractor for turning tools, including a base ruler, a rotary ruler and a slide rule. The base ruler is L-shaped, divided into a horizontal end and a vertical end, and a fan-shaped dial is arranged at its corner. The rotary ruler is L-shaped, with its corner facing downwards, and the rotary ruler is rotatably connected with the center of the fan-shaped dial. An arc-shaped chute is arranged in the fan-shaped dial, and a pointer is installed on the dial. The pointer is provided with a boss, and the boss is embedded in the arc-shaped chute and connected to one end of the rotary ruler. The pointer can slide along the arc chute. The sliding rule is L-shaped, one end of which is parallel to the horizontal end of the base ruler, and the other end is slidably connected to the vertical end of the base ruler, and the base ruler and the sliding rule form an F-shaped whole.

Further, it also includes a positioning block, the middle part of the vertical end of the base ruler is provided with a bar-shaped chute, the positioning block is provided with a boss, the slide rule is provided with a boss, the boss of the positioning block and the slide rule The positions of the bosses are relatively close, embedded and installed in the bar-shaped chute, and the positioning block and the slide rule are connected by screws, so that the slide rule slides up and down along the bar-shaped chute.

Further, the scale range of the fan-shaped dial is -40°～90°.

Further, a reading hole is provided in the middle of the pointer.

Further, the base ruler is in the shape of a right angle L, the rotary ruler is in the shape of a right angle L, and the slide rule is in the shape of a right angle L.

Beneficial effects of the present invention: in the same two-dimensional plane, five basic turning tool angles can be measured, and all of them can be directly obtained turning tool angles, improving measurement efficiency, simple structure, scientific measuring method, and low cost. It has good teaching effect.

Description of drawings

Fig. 1 is a schematic diagram of the structure of the present invention.

Fig. 2 is a schematic cross-sectional view of A-A of the present invention.

Fig. 3 is a B-B sectional schematic diagram of the present invention.

Fig. 4 is the measuring schematic diagram of rake angle of turning tool of the present invention

Fig. 5 is a schematic diagram of measuring the clearance angle of the turning tool according to the present invention.

Fig. 6 is a schematic diagram of measuring the main deflection angle of the turning tool according to the present invention.

Fig. 7 is a schematic diagram of the measurement of the secondary deflection angle of the turning tool according to the present invention.

Fig. 8 is a schematic diagram of measuring the inclination angle of the cutting edge of the present invention.

Referring to the drawings and specific embodiments below, the present invention will be further described.

Detailed ways

As shown in Figure 1, Figure 2 and Figure 3, a simple turning tool protractor includes a base ruler 1, a rotary ruler 2 and a sliding ruler 3. The base ruler 1 is in the shape of a right angle L, and is divided into a horizontal end 11 and a vertical end 12, and a fan-shaped dial 13 is arranged at its corner, and the scale range is -40°～90°. Rotating ruler 2 is a right angle L shape, and its corner is downwards, and is connected with the center of circle of fan-shaped dial 13 rotation. The fan-shaped dial 13 is provided with an arc-shaped chute 131 concentric with the fan-shaped dial 13, and a pointer 132 is installed on the fan-shaped dial 13, and the boss of the pointer 132 is embedded in the arc-shaped chute 131 and connected to one end of the rotary ruler 2 , the pointer 132 can slide along the arc chute 131 , and the middle part of the pointer 132 is provided with a reading hole 133 for reading the angle indicated by the pointer 132 . The sliding ruler 3 is a right angle L shape, one end of which is parallel to the horizontal end 11 of the base ruler 1, and the other end is slidably connected to the vertical end 12 of the base ruler 1. The middle part is provided with a bar-shaped chute 121, the positioning block 4 is provided with a boss, and the slide rule 3 is also provided with a boss. In the groove 121, the vertical end 12 of the base ruler 1 is clamped in the middle, and the positioning block 4 and the slide rule 3 are connected by 41 screws, so that the slide rule 3 slides up and down along the bar-shaped chute 121. The base ruler 1 and the slide ruler 3 form an F-shaped whole.

The slide rule 3 can slide up and down relative to the base ruler 1; the rotary ruler 2 and the base ruler 1 can rotate relatively, and the rotation drives the slider pointer 132 on the rotary ruler 2 to point to the corresponding scale on the dial on the base ruler 1 to achieve the function of reading . By the rotation of the rotary ruler 2 and the up and down sliding adjustment of the slide rule 3, the corresponding blade surface and the blade of the ruler surface and the turning tool are flattened, and the desired turning tool angle can be directly read from the fan-shaped dial 13.

The method for measuring the five basic angles of the turning tool of the present invention will be introduced below in conjunction with the accompanying drawings and specific embodiments.

Front angle measurement: measure the front angle of the turning tool A as shown in Figure 4, place the turning tool A on the upper edge of the slide rule 3, adjust the slide rule 3 up and down to the corresponding position, and turn the rotary ruler 2 so that the lower edge of the rotary ruler 2 is in line with the Turning tool A main cutter surface reaches line contact, and pointer 132 points to a certain value of fan-shaped dial 13, so just can directly read the angle of rake angle.

Relief angle measurement: as shown in Figure 5, place the turning tool A at the corresponding position on the upper edge of the horizontal end 11 of the base ruler 1, push the rotary ruler 2 to rotate until it reaches line contact with the main relief surface, and the pointer 132 points to the sector dial 13 A certain value, so that the angle of the relief angle can be read directly.

Main declination measurement: as shown in Figure 6, place the handle of the turning tool A on the lower edge of the horizontal end 11 of the base ruler 1, push the rotary ruler 2 to make the ruler surface fully fit the main cutting edge, and the pointer 132 points to the fan-shaped dial A certain value of 13 can directly and quickly read the main declination angle from the dial.

Auxiliary deflection angle measurement: as shown in Figure 7, attach the handle of turning tool A to the upper edge of slide rule 3, move the handle left and right and adjust the position of rotary ruler 2 and turning tool A, so that the auxiliary cutting edge and the surface of rotary ruler 2 stick together Together, the pointer 132 points to a certain value of the fan-shaped dial 13, and the secondary deflection angle can be directly and quickly read from the dial.

Blade inclination measurement: as shown in Figure 8, place the turning tool A on the corresponding position on the upper edge of the slide rule 3, adjust the base ruler 1 and the rotary ruler 2, so that the ruler surface of the rotary ruler 2 fits the main cutting edge of the turning tool A, and the pointer 132 Point to a certain value of the fan-shaped dial 13, and the secondary deflection angle can be directly and quickly read from the dial.

The present invention uses one foot without disassembly and assembly, and measures five basic angles of the turning tool A in the same two-dimensional plane. Put the turning tool A flat against the corresponding ruler surface, adjust the ruler surface by rotating and sliding up and down, so that the ruler surface is flat with the corresponding blade surface and blade of the turning tool A, and the required turning value can be read directly from the dial. Knife A angle. The value range of the dial is -40°～90°. By adjusting the position of the turning tool A, the five basic angles of the turning tool A can be calculated quickly and directly, and the negative turning tool A angle can also be measured.

The above are only preferred implementations of the present invention, and it should be noted that the above preferred implementations should not be regarded as limiting the present invention, and the scope of protection of the present invention should be based on the scope defined in the claims. For those skilled in the art, without departing from the spirit and scope of the present invention, some improvements and modifications can also be made, and these improvements and modifications should also be regarded as the protection scope of the present invention.

Claims (5)

1. a simple and easy lathe tool protractor, is characterized in that: comprise base chi, turn chi and slide rule, and described base chi is L shape, and be divided into horizontal ends and vertically hold, its corner is provided with fan dial; The described chi that turns is L shape, its corner down, described in turn chi and the fan dial center of circle is rotationally connected, be provided with arc chute in described fan dial, described index dial is provided with pointer, described pointer is provided with boss, described boss embed be arranged in arc chute and with turn chi one end and be connected, described pointer can slide along arc chute, described slide rule is L shape, its one end is parallel with base chi horizontal ends, and the other end and base chi are vertically held and be slidably connected, and base chi and slide rule form the entirety of F shape.

2. the simple and easy lathe tool protractor of one according to claim 1, it is characterized in that: also comprise locating piece, described base chi vertically holds middle part to be provided with bar shaped chute, described locating piece is provided with boss, described slide rule is provided with boss, and the boss of described locating piece is relative with the lug boss position of slide rule fits, and embeds and is arranged in bar shaped chute, and connect locating piece and slide rule by screw tightening, slide rule is slided up and down along bar shaped chute.

3. the simple and easy lathe tool protractor of one according to claim 1, is characterized in that: described fan dial meter full scale is-40 ° ~ 90 °.

4. the simple and easy lathe tool protractor of one according to claim 1, is characterized in that: be provided with reading hole in the middle part of described pointer.

5. the simple and easy lathe tool protractor of one according to claim 1, is characterized in that: described base chi is right angle L shape, described in turn chi be right angle L shape, described slide rule is right angle L shape.