CN201867147U - Tooling for detecting large-diameter circular parts - Google Patents

Abstract

The utility model discloses a detection tool for the diameter of a large-diameter circular part, which comprises an arc-shaped guide rail, on which two radially extending guide shafts are movable along the radial direction. The axis extension line of the shaft all passes through the center of the arc-shaped guide rail; two guide sleeves are respectively matched with the sliding sleeves of the two guide shafts, and the opposite sides of each guide sleeve correspond to the radial direction of the chord length of the measured workpiece respectively. There are two extension arms of equal length extended and fixed, and each extension arm on the two guide sleeves is in the same plane as the arc-shaped guide rail, and the two guide sleeves are hinged by the adjacent extension arms through the hinge shaft; on the hinge shaft There is a vernier base hinged, and the sliding sleeve in the vernier base is matched with the main vernier scale. One end of the main vernier scale is fixed on the arc-shaped guide rail, and the axial extension line of the main vernier scale passes through the arc-shaped guide rail. the center of the circle. The utility model has the characteristics of simple structure, convenient use, high measurement accuracy and the like.

Description

Inspection Tooling for Large Diameter Circular Parts

technical field

The utility model relates to a tool for measuring the diameter of a large-diameter circular part. the

Background technique

In large-scale mechanical processing and manufacturing, we often encounter the problem of measuring the diameter of some large-diameter parts. For example, some large-scale electrical equipment needs to use a connecting flange with a diameter of 2000mm and an error within 0.3mm. Currently commonly used measurement methods can be divided into the following categories:

①. Directly use large vernier calipers or micrometers for measurement. With this method, as the diameter of the part increases, the volume and weight of the vernier caliper or micrometer will inevitably increase, which will bring difficulties to the measurement.

②. Calculate the diameter of the circle by measuring relevant quantities with commonly used tools such as small calipers or micrometers. Due to the conversion error in the calculation process, the measurement accuracy of this method is low and cannot meet the requirements of machining accuracy. the

3. Adopt the photoelectric measuring instrument to measure the diameter of the circle, but the cost of the photoelectric measuring instrument used in this method is too high, so that the measurement cost of the circle diameter is higher, which is not suitable for promotion. the

Utility model content

The purpose of the utility model is to provide a detection tool for measuring the diameter of large-diameter circular parts with simple structure, convenient use and accurate measurement. the

The technical solution of the detection tooling for large-diameter circular parts of the present utility model is: a detection tooling for the diameter of large-diameter circular parts, including:

An arc-shaped guide rail, the arc-shaped guide rail is equipped with two radially extending guide shafts radially, and the axis extension lines of the two guide shafts pass through the center of the arc-shaped guide rail;

Two guide sleeves that are respectively matched with the two guide shaft sliding sleeves, the opposite sides of each guide sleeve respectively corresponding to the chord length of the workpiece to be measured are radially extended and fixed with two extension arms with equivalent lengths, and the extension arms of each extension arm The ends are respectively equipped with detection heads for aligning the outer circle of the part to be measured. The extension arms on the two guide sleeves are on the same plane as the arc-shaped guide rail, and the detection heads on the extension arms adjacent to the two guide sleeves pass through hinge shaft hinge;

A vernier ruler, the vernier ruler includes a vernier ruler seat and a vernier main ruler fitted with a sliding socket, the vernier ruler seat is rotatably engaged with the hinge shaft, and one end of the vernier master ruler is fixed on the arc On the guide rail, the other end axially extends through the vernier base, and the axial extension line of the vernier main scale passes through the center of the arc-shaped guide rail.

A blind hole is axially opened on the end face of the vernier base facing one end of the arc-shaped guide rail. The axis of the blind hole is in the same direction as the main vernier scale. The radially protruding guide pin on the outer peripheral surface and the corresponding long hole on the vernier base are positioned and slidably matched with the vernier base. An adjustment screw is screwed in the screw sleeve, and the other end of the adjustment screw is a shaft. extending to and threadedly connected with the arc-shaped guide rail. the

On the extension arm of one of the guide sleeves close to the hinge shaft, a connecting arm protrudes towards the direction of the arc-shaped guide rail. A connecting rod is hinged at the end of the connecting arm. The other end is hinged with an adjustment handle, and the middle part of the adjustment handle is hinged on the guide sleeve. the

A torsion spring cooperating with the connecting rod for adjusting the return tendency of the handle is provided on the connecting arm. the

The two ends of the arc-shaped guide rail are respectively provided with through grooves in the radial direction, and one end of each of the guide shafts is respectively provided with a guide piece that slides and fits with the corresponding through groove, and each guide piece is respectively rotatably equipped with a circular arc Roller mechanism with rolling fit on the inner and outer peripheral surfaces of the shaped guide rail. the

The roller mechanism is composed of two rollers rolling with the outer peripheral surface of the arc-shaped guide rail and one roller rolling with the inner peripheral surface of the arc-shaped guide rail. One roller is located on the axial extension line of the guide shaft, and the two rollers rolling with the outer peripheral surface of the arc-shaped guide rail are symmetrically arranged on both sides of the axial extension line of the guide shaft. The outer periphery of roller is sheathed with annular spring. the

Handles are respectively fixed on the two guide sleeves. the

The detection tooling of the utility model has the characteristics of small size, simple structure, convenient use, and low manufacturing cost, and it makes full use of the principle of three-point fixed arc to correspond the three points of two mutually hinged guide sleeves to the measured The outer circle of the workpiece can easily measure the distance between the hinge axis and the arc-shaped guide rail between the two guide sleeves through the vernier. By calculating the distance from the hinge axis to the arc-shaped guide rail and the radius of the arc-shaped guide rail is The diameter of the measured workpiece can be obtained, and there is no conversion error, so the measurement is very accurate, can completely replace the existing measuring tools, and is suitable for wide promotion in large-scale machining and manufacturing industries. the

Description of drawings

Fig. 1 is the structural representation of the detection frock of large-diameter circular part diameter of the present utility model;

Fig. 2 is the side view of Fig. 1;

Fig. 3 is the back view of Fig. 1;

Fig. 4 is a cross-sectional view of A-A in Fig. 3 .

Detailed ways

As shown in Figures 1 to 4, the detection tooling for the diameter of large-diameter circular parts of the present invention includes: an arc-shaped guide rail 2 with a known diameter, on which two arc-shaped guide rails 2 are movable radially Radially outwardly extending guide shafts 5, the axial extension lines of the two guide shafts 5 pass through the center of the arc-shaped guide rail 2, wherein, the end faces of the two ends of the arc-shaped guide rail 2 are respectively radially provided with The through grooves on the inner and outer peripheral surfaces, the two guide shafts 5 are correspondingly matched with the two through grooves respectively, and the ends of the two guide shafts 5 are respectively fixed with guide pieces for inserting into the corresponding through grooves. A roller mechanism 4 composed of three rollers is provided, wherein one of the rollers on each guide piece rolls and fits with the inner peripheral surface of the arc-shaped guide rail 2, and the roller is located on the axial extension line of the corresponding guide shaft 5, and the other two The rollers are rollingly matched with the outer peripheral surface of the arc-shaped guide rail 2, and the two rollers are symmetrically arranged on both sides of the axial extension line of the guide shaft 5. The rollers keep in close contact with the arc-shaped guide rail 2 to ensure that the three rollers are always matched with the inner and outer peripheral surfaces of the arc-shaped guide rail 2. The positioning of these three rollers can ensure that when the guide shaft moves on the arc-shaped guide rail 2, Its axial extension line passes through the center of circle of arc-shaped guide rail 2 all the time. the

The two guide shafts 5 are respectively slidingly fitted with guide sleeves 6, and the opposite sides of the outer peripheral surfaces of the two guide sleeves 6 are respectively extended radially and provided with two extension arms corresponding to the chord length of the outer circle of the workpiece to be measured. The end of each extension arm is respectively provided with a detection head 7 for aligning the outer circle of the measured part, and the detection heads 7 of the two adjacent extension arms between the two guide sleeves 6 are hinged by a hinge shaft, so that the two guide sleeves 6 Each extension arm is in the same plane as the arc-shaped guide rail 2 . There is a vernier base 10 hinged on the hinge shaft, and a vernier main scale 8 is slid and sheathed in the vernier base 10. One end of the vernier main scale 8 is fixed on the center of the arc-shaped guide rail 2, so that the main vernier The axis of chi 8 passes through the center of circle of circular arc guide rail 2. Circular guide rail 2, guide shaft 5, guide sleeve 6, vernier scale base 10 and vernier main chi 8 jointly form the basic frame structure of the detection tooling of the large-diameter circular part diameter of the present utility model. the

In order to facilitate fine-tuning in the measurement to ensure the measurement accuracy, a blind hole is axially opened on the end face of the vernier base 10 facing the end of the arc-shaped guide rail 2, and the axis of the blind hole is in the same direction as the main vernier ruler 8. A screw sleeve 9 is arranged in the hole, and the screw sleeve 9 is positioned and slidably matched with the vernier base 10 through the guide pin radially protruding on its outer peripheral surface and the corresponding long hole on the vernier base 10. An adjusting screw rod 1 is screwed, and the other end of the adjusting screw rod 1 extends axially and is threadedly connected with the arc-shaped guide rail 2 . the

In order to be more convenient for operation, on the extension arm of one of the guide sleeves 6 near the hinge shaft, a connecting arm is protruded toward the arc-shaped guide rail 2. The guide pin on the sleeve 9 is connected, and the other end of the connecting rod 11 is hinged with an adjustment handle 13, the middle part of which is hinged on the guide sleeve 6, and the connecting arm is also provided with the connecting rod 11 for adjusting the handle. A torsion spring in a tendency to return. On the two guide sleeves 6, a handle to be held in use is also fixed respectively. the

The use of this detection tool is described below: First, because the two guide sleeves 6 are hinged, there are only three points between the two guide sleeves: the endpoints of the ends of the extension arms on the outside and the hinge points of the two inner extension arms , the detection heads 7 at the ends of the two outer extension arms are defined as point A and point B respectively, and the hinged detection heads 7 of the two inner extension arms are defined as point O, so that a circle can be determined by using the principle of three fixed circles . Then set the vernier to zero, and adjust the detection tool to the vicinity of the minimum measurement position. At this time, the circle determined by the three points A O B is used as the reference circle and its value is measured. The value is preferably an integer for easy calculation. This value is engraved on the arc guide. the

When measuring, first rotate and adjust the screw rod 1 so that the size of the circle determined by the three points A O B on the two guide sleeves 6 is slightly larger than the size of the measured part, and hold the handle with both hands to put the detection tool on the A of the guide sleeve 6. The three points O and B are close to the surface of the measured part, the two points A and B on the two guide sleeves are in contact with the outer circumference of the measured part, and the point O is not in contact. At this time, the center of the circle determined by the three points A O B and the tested part The centers of the measured parts are not coincident. Pull the adjustment handle 13 by hand, and the adjustment handle 13 rotates around its hinge point, so that the end of the adjustment handle 13 close to the vernier moves to the direction of the arc-shaped guide rail 2 and drives the connecting rod 11 to rotate, and the connecting rod 11 rotates around its hinge point to drive The guide pin moves away from the arc-shaped guide rail 2, and the guide pin drives the screw sleeve 9 to move at the same time. The screw sleeve 9 pulls the arc-shaped guide rail 2 to move in the same direction through the adjustment screw 1, and the movement of the arc-shaped guide rail 2 breaks A The trend that the center of the circle determined by the three points O B coincides with the center of the arc-shaped guide rail 2, in order to keep the condition that the center of the circle determined by the three points A O B and the arc-shaped guide rail 2 must coincide, O The point is also bound to move in the same direction as the arc-shaped guide rail 2, so as to approach the outer peripheral surface of the measured part, and finally contact the outer peripheral surface of the part to reach the circle and arc-shaped guide rail determined by the three points of the measured part and A O B 2 The centers of the three circles coincide. At this time, the diameter of the measured part can be obtained by calculating the reading of the vernier. the

In specific applications, because the size of the parts to be tested is sometimes very large, it is necessary to extend the length of the two guide shafts, which will cause the size of the detection tool to increase and be very heavy, and it will be very inconvenient to use. Therefore, each set The inspection tooling can prepare several arc-shaped guide rails in different diameter ranges. When using it, select the arc-shaped guide rails in this range according to the size of the parts to be tested. the

Claims (7)

1. the detection frock of a large-diameter circular diameter of part is characterized in that it comprises:

One arc-shaped rail, this circumferential slidable fit in arc-shaped rail upper edge has the two outward extending radially axis of guides, and the axis extended line of two axis of guides all passes the center of circle of arc-shaped rail;

Two orienting sleeves that cooperate respectively at described axis of guide slip sleeve, on each orienting sleeve relative both sides respectively the chord length of the corresponding workpiece of surveying radially extend and be fixed with two adjutages that length is suitable, the end of each adjutage is respectively arranged with the detection head that is used to aim at the tested part cylindrical, each adjutage and described arc-shaped rail on two orienting sleeves are in same plane, and adjutage adjacent between two orienting sleeves is hinged by hinge axis;

One vernier scale, this vernier scale comprises vernier rod support and the vernier main scale that the slip sleeve cooperates, described vernier rod support cooperates with described hinge axis, one end of described vernier main scale is fixed on the described arc-shaped rail, the other end extends axially and passes described vernier rod support, and the axially-extending line of described vernier main scale passes the center of circle of described arc-shaped rail.

2. the detection frock of large-diameter circular diameter of part according to claim 1, it is characterized in that, on the end face of arc-shaped rail one end, axially offer blind hole at described vernier rod support, the axis of this blind hole and described vernier main scale are in the same way, be provided with a swivel nut in the blind hole, this swivel nut is located with the vernier rod support by the corresponding slotted hole of offering on the pilot pin that radially is convexly equipped with on its outer peripheral face and the vernier rod support and is slidingly matched, be installed with one and adjust screw mandrel in described swivel nut, the other end of this adjustment screw mandrel extends axially and is threaded with described arc-shaped rail.

3. the detection frock of large-diameter circular diameter of part according to claim 2, it is characterized in that, an orienting sleeve therein convexes with linking arm near on the adjutage of hinge axis towards the arc-shaped rail direction, the end of linking arm is hinged with a connecting rod, one end of this connecting rod is connected with described pilot pin, the other end of connecting rod is hinged with one and adjusts handle, and the middle part of this adjustment handle is hinged on this orienting sleeve.

4. the detection frock of large-diameter circular diameter of part according to claim 3 is characterized in that, is provided with to cooperate with described connecting rod on described linking arm to be used to adjust the torsion spring that handle is in the trend of resetting.

5. according to the detection frock of any described large-diameter circular diameter of part of claim 1 to 4, it is characterized in that, the two ends of described arc-shaped rail radially offer groove respectively, one end of described each axis of guide is respectively equipped with the countervane that is slidingly matched with corresponding groove, is rotatably equipped with the idler wheel mechanism that rolls and cooperate with the arc-shaped rail inner and outer circumferential surfaces on each countervane respectively.

6. the detection frock of large-diameter circular diameter of part according to claim 5, it is characterized in that, described idler wheel mechanism is made up of two rollers that cooperate with described arc-shaped rail outer peripheral face rolling and a roller that cooperates with the rolling of arc-shaped rail inner peripheral surface, a described roller that cooperates with the rolling of arc-shaped rail inner peripheral surface is positioned on the axially-extending line of the described axis of guide, roll two rollers cooperating of described and arc-shaped rail outer peripheral face are symmetricly set in the both sides of described axis of guide axially-extending line, in the outer race of described three rollers ring spring are housed.

7. according to the detection frock of any described large-diameter circular diameter of part of claim 1 to 4, it is characterized in that, on described two orienting sleeves, be fixed with handle respectively.

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