CN101556131A - Special angle gauge for outer cone - Google Patents

Abstract

The invention relates to a special measuring tool for taper, in particular to a special protractor for external cones. It includes a guide rod, a main scale plate, a secondary scale plate, an upper measuring ruler and a lower measuring ruler. The guide rod is L-shaped and is connected by a horizontal bar and a vertical bar. A guide block is set in the sleeve, one end surface of the guide block is fixedly connected with the connection plate, and a pressure block is installed on the other end surface parallel to the connection plate, the first pin is installed in the center hole of the pressure block, and the other end of the first pin is set Threaded, the threaded end is covered with the first lock nut, the other end of the connecting plate is fixedly connected with the main scale plate, the center hole of the main scale plate is embedded with the second pin shaft, the auxiliary scale plate is adjacent to the main scale plate set In the middle part of the second bearing pin, the extension end of the second bearing pin is provided with a thread, and the second locking nut is sleeved on the thread, and an upper measuring ruler is installed under the secondary scale plate. Compared with the prior art, the invention has the advantages of convenient measurement, time saving and accurate measurement result.

Description

Special protractor for external cone

Technical field:

The invention relates to a special measuring tool for tapers, in particular to a special protractor for external cones.

Background technique:

In mechanical equipment, shaft parts with conical surfaces are often used. For such parts with high precision and surface roughness requirements, in addition to being processed by CNC lathes, they are generally turned on ordinary lathes first, and left Grind the allowance and then grind on an external grinding machine. The method of processing the conical surface on the lathe is to rotate the small tool holder by a corresponding angle. The method of grinding the conical surface on the grinding machine is to rotate the table by a corresponding angle. The scale on the lathe tool holder and the scale on the grinder table are very inaccurate and can only be used as a reference. In the processing process, according to the actual taper of the workpiece, if you want to process a qualified conical surface, you must first have a protractor that can accurately measure the taper of the conical surface. However, due to the limitation of the knots near the conical surface on the shaft and the fact that the workpiece is clamped on the machine tool, it is difficult or even impossible to accurately measure the taper of the conical surface with the existing protractor. At present, the common method used by workers is to first use a micrometer or a vernier caliper to measure the diameters at both ends of the conical surface and the length of the generatrix, and then calculate the taper of the conical surface based on these data. Since the two ends of the conical surface are inclined surfaces, the measurement error is large, so the calculated taper also has a large error. Therefore, it is not only troublesome but also difficult to ensure the accuracy of the processed conical surface with the current measurement method.

Invention content:

The purpose of the present invention is to overcome the disadvantages of the background technology and provide a special protractor for the outer cone that can accurately measure the shaft parts, especially the shaft parts clamped on the machine tool.

The present invention adopts following technical scheme:

A special protractor for external cones, including a guide rod, a main scale plate, an auxiliary scale plate, an upper measuring ruler and a lower measuring ruler. The guide rod is L-shaped and is connected by a horizontal bar and a vertical bar. One end is equipped with a lower measuring ruler, and a guide block is set on the longitudinal rod. One end surface of the guide block is fixedly connected with the connection plate, and a pressure block is installed on the other end surface parallel to the connection plate. The center hole of the pressure block is equipped with There is a first pin shaft, the other end of the first pin shaft is provided with threads, the threaded end is covered with a first lock nut, the other end of the connecting plate is fixedly connected with a main scale plate, and the center of the main scale plate A second pin shaft is embedded in the hole, and the secondary scale plate is set on the middle part of the second pin shaft adjacent to the main scale plate. The extension end of the second pin shaft is provided with threads, and the second lock nut, and the upper measuring ruler is installed under the secondary scale plate.

Compared with the prior art, the present invention adopting the above-mentioned technical solution has a lower measuring ruler, the lower busbar of the workpiece to be measured coincides with the top of the lower measuring ruler, and the bottom of the upper measuring ruler coincides with the upper surface of the measured workpiece, that is The taper of the measured conical surface can be read out, the measurement is convenient, time-saving and the measurement result is accurate.

As an improvement of the present invention, the guide block is composed of two L-shaped and symmetrically arranged side plates and a partition plate, the partition plate is installed between the two L-shaped side plates, and the upper plane of the partition plate is in line with the The upper planes of the two side plates are flush with each other.

As an improvement of the present invention, the second pin has a stepped structure, the first step of which is embedded in the central hole of the main scale plate, and the connecting end of the first step and the second step is fitted with the secondary scale plate , the second step is in the shape of a straight line-arc-line-arc connection, a washer is placed on its outer cover, the center hole of the washer corresponds to the shape of the second step, and the third step is the threaded end , the threaded end is sleeved with the second locking nut.

The second step is in the shape of a straight line-arc-line-arc connection, and a washer is placed on its outer cover. The center hole of the washer corresponds to the shape of the second step to prevent the secondary scale from being pressed by the second lock nut. When the plate is pressed, the sub-scale plate will rotate together with it.

Description of drawings:

Fig. 1 is a front view of the present invention.

Figure 2 is a side view of the present invention.

Fig. 3 is a cross-sectional view along line A-A of Fig. 2 .

Figure 4 D-D sectional view of Figure 3.

Fig. 5 is a B-B sectional view of Fig. 2 .

Fig. 6 is a C-C sectional view of Fig. 2 .

In the figure: main scale plate 1, auxiliary scale plate 2, upper measuring ruler 3, guide rod 4, lower measuring ruler 5, first screw 6, second pin 7, second screw 8, connecting plate 9, third screw 10 , the third pin 11, the cross bar 12, the longitudinal bar 13, the first lock nut 14, the first washer 15, the pressure block 16, the first pin shaft 17, the left side plate 18, the right side plate 19, the separator 20, The fourth screw 21 , the second washer 22 , the second locking nut 23 , the second pin shaft 24 , the third step 25 , the second step 26 , the first step 27 and the fourth pin 28 .

Wherein: the left side plate 18, the right side plate 19 and the dividing plate 20 form guide blocks.

Detailed ways:

The present invention is described in detail below in conjunction with accompanying drawing and embodiment:

The guide bar 4 is L-shaped, connected by the cross bar 12 and the longitudinal bar 13 at an angle of 90°, one end of the cross bar 12 is equipped with a lower measuring ruler 5 through the first screw 6, and a guide block is set on the longitudinal bar 13 to guide The block is made up of left side plate 18, right side plate 19 and partition plate 20, left side plate 18 and right side plate 19 are L-shaped and arranged symmetrically, and partition plate 20 is installed between left side plate 18 and right side plate 19 , the upper plane of the partition plate 20 is flush with the upper planes of the left side plate 18 and the right side plate 19, and one end surface of the left side plate 18 and the right side plate 19 is connected to the connecting plate 9 through the third screw 10 and the third pin 11 Connect, the other end face that guide block and connecting plate 9 are arranged in parallel is equipped with briquetting block 16, and the first pin shaft 17 is housed in the center hole of briquetting block 16, and the other end of the first pin shaft 17 is provided with screw thread, and threaded end outer sleeve There is a first washer 15 and a first lock nut 14, and the other end of the connecting plate 9 is fixedly connected with the main scale plate 1 through the fourth screw 21 and the fourth pin 28, and the center hole of the main scale plate 1 is embedded with a second The pin shaft 24, the second pin shaft 24 is an interference fit with the center hole of the scale plate 1, the secondary scale plate 2 is set adjacent to the main scale plate 1 and is set in the middle part of the second pin shaft 24, the secondary scale plate 2 and the first scale plate The two pin shafts 24 are in a hinged state, and the secondary scale plate 2 can rotate relatively around the second pin shaft 24. The second pin shaft 24 is in a stepped structure, and its first step 27 is embedded in the center hole of the main scale plate 1. The connecting end of the step 27 and the second step 26 is located in the middle of the second pin shaft 24, and the second step 26 is in the shape of a straight-arc-straight-arc connection, and a second washer 22 is sheathed on it. The center hole of the second washer 22 corresponds to the shape of the second step 26, the third step 25 of the second pin shaft 24 is a threaded end, and the second lock nut 23 is sleeved on the threaded end, and the lower part of the auxiliary scale plate 2 passes The second pin 7 and the second screw 8 are provided with the upper measuring ruler 3 .

The scale on the main scale plate 1 represents one degree, and the scale on the auxiliary scale plate 2 represents five points. When the bottom of the upper measuring ruler 3 is parallel to the top of the lower measuring ruler 5, the zero on the auxiliary scale plate 2 The scale line is aligned with the zero scale line on the main scale plate 1, which is zero degrees.

Instructions:

When using the special protractor for external cones to measure the taper of the conical surface of the shaft parts clamped on the lathe or cylindrical grinding machine, firstly make the conical surface of the part between the upper measuring ruler 3 and the lower measuring ruler 5, and the first lock nut 14 and the second locking nut 23, adjust the upper measuring ruler 3 so that the bottom of the upper measuring ruler 3 and the upper surface of the lower measuring ruler 5 coincide with the upper and lower busbars of the conical surface respectively, and then lock the first locking nut 14 and the second Lock nut 23, at this moment just can read the conicity of measured conical surface from protractor. (The reading method of the special protractor for external cone is the same as that of the general protractor.) The measurement accuracy of this special protractor is five points, that is, one grid on the auxiliary scale plate 2. For example: turn the auxiliary scale plate 2 clockwise, and the auxiliary scale plate 2 The 0 scale line on the top is located on the right of the 10th grid on the main scale plate 1, which is 10°, and the 4th scale line on the right side of the 0 scale line on the sub scale plate 2 is just right with a certain scale line on the main scale plate 1 Alignment is 20' (5'×4), and the taper measured by the protractor is 10°+20'.

Claims (3)

1. A special protractor for external cones, comprising a guide rod, a main scale plate, a secondary scale plate, an upper measuring ruler and a lower measuring ruler, the guide rod is L-shaped and is connected by a horizontal bar and a vertical bar, and is characterized in that : one end of the cross bar is equipped with a lower measuring ruler, the vertical bar is covered with a guide block, one end face of the guide block is fixedly connected with the connecting plate, and a pressure block is arranged on the other end face parallel to the connecting plate. A first pin shaft is installed in the center hole of the pressure block, the other end of the first pin shaft is provided with a thread, the thread end is covered with a first lock nut, the other end of the connecting plate is fixedly connected with a main scale plate, The central hole of the main scale plate is embedded with a second pin shaft, and the secondary scale plate adjacent to the main scale plate is set on the middle part of the second pin shaft, and the extension end of the second pin shaft is provided with threads. A second locking nut is overlaid on the thread, and the upper measuring ruler is installed under the auxiliary scale plate. 2. The special protractor for external cone according to claim 1, characterized in that: the guide block is composed of two L-shaped and symmetrically arranged side plates and a partition, and the partition is installed on the sides of the two L-shaped between the plates, and the upper plane of the partition is flush with the upper planes of the two side plates. 3. The special protractor for external cone according to claim 1, characterized in that: the second pin shaft is in a stepped structure, the first step of which is embedded in the central hole of the main scale plate, and the first step and the second pin The secondary scale plate is set on the connecting end of the second step, and the second step is in the shape of a straight line-arc-line-arc connection. Correspondingly, the third step is the threaded end on which the second locking nut is sleeved.

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