CN204027504U - A kind of inner bore chamfering measurement mechanism - Google Patents

Abstract

The utility model belongs to machining measurement mechanism, be definitely a kind of can measurement products inner bore chamfering and the measurement mechanism of the inner bore chamfering degree of depth.Comprise measuring table and the vertical gauge stand being fixed thereon, one side of described gauge stand middle and upper part is fixed with the crossbeam of horizontal positioned, described crossbeam is fixed with dial gauge away from the top of one end of described gauge stand, crossbeam is run through in the lower end of described dial gauge, and be connected with downward sounding rod, the end of described sounding rod lower end is connected with measurement pressure head, the end of described measurement pressure head lower end is conical, and conical pointed end, the cone angle of described measurement pressure head is greater than or less than the twice of the inner bore chamfering angle of measured product.Be related to size by the twice that changes the cone angle of conical measurement pressure head and the inner bore chamfering angle of measured product, measure angle and the degree of depth of product inner bore chamfering; Described apparatus structure is simple, easy to use, and cost is low, is convenient at the scene the quick and precisely quality of testing product.

Description

An inner hole chamfer measuring device

technical field

The utility model belongs to a machining measuring device, specifically a measuring device capable of measuring the chamfering of the inner hole of a product and the depth of the inner hole chamfering.

Background technique

In the machining industry, it is often necessary to drill holes on the product. In order to reduce stress concentration or installation needs, it is necessary to chamfer the inner hole. The accuracy of the angle and diameter of the inner chamfer is related to the quality of the product.

At present, one method of measuring the angle of the inner chamfer of the product is to make a standard plug gauge for general measurement. The measurement accuracy is not high and cannot meet the requirements of high-precision products. Another way is to use a projector, but using a projector requires cutting the product from the center, which will cause damage to the product, and the measurement efficiency is low, which cannot meet the strict quality requirements of the product.

Utility model content

The technical problem to be solved by the utility model is to provide a measuring device for inner hole chamfering, aiming at solving the problem that the measurement accuracy of the inner hole chamfering of the product is not high and the measurement process damages the product quality during the product processing process.

The technical solution of the utility model for solving the above-mentioned technical problems is as follows: a device for measuring inner hole chamfering, including a measuring platform and a vertical table seat fixed thereon, and one side of the middle and upper part of the table seat is fixed with a horizontal beam , a dial gauge is fixed above the end of the crossbeam away from the table seat, the lower end of the dial gauge runs through the crossbeam, and is connected with a downward measuring rod, and the end of the lower end of the measuring rod is connected with a measuring pressure gauge. The lower end of the measuring indenter is conical, and the tip of the cone is downward, and the conical angle of the measuring indenter is greater than or less than twice the chamfering angle of the inner hole of the product to be measured.

The beneficial effects of the utility model are: by replacing the measuring indenter with different conical angles, when the conical angle of the measuring indenter is less than twice the inner hole angle of the product to be measured, the measuring indenter can penetrate deep into the product during measurement The depth of the hole, respectively measure the size of the product surface and the depth of the inner hole, so as to calculate the height of the chamfer, and then calculate the angle of the chamfer through trigonometric functions, which can easily realize the non-destructive measurement of the inner hole chamfer angle; when the When the conical angle of the above-mentioned measuring indenter is greater than twice the angle of the inner hole of the product to be measured, the up and down movement of the measuring indenter will drive the measuring rod to move up and down, so that the pointer of the dial indicator will be offset, and the measuring indenter will touch the For the measured part, calculate the diameter of the chamfer through the reading of the dial gauge. The device has the advantages of simple structure, convenient use and low cost, and is convenient for quickly and accurately detecting the quality of products on site.

On the basis of the above technical solutions, the utility model can also be improved as follows.

Further, a locking device is provided at the end of the crossbeam, and the lower end of the dial indicator is fixed above the end of the crossbeam away from the gauge base through the locking device.

The beneficial effect of adopting the above further solution is that the penetration depth of the adjusting dial indicator in the beam can be controlled by the locking device.

Further, the locking device adopts a bolt tightening method.

The beneficial effect of adopting the above further scheme is that the fixed dial indicator will not slip due to the pulling force of the measuring pressure head at the lower end during measurement, thus affecting the measurement accuracy.

Further, the measuring pressure head and the measuring rod are fixedly connected by threads.

The beneficial effect of adopting the above further solution is that once the measuring pressure head is worn or damaged, it is convenient to replace.

Further, the connection between the dial gauge, the measuring rod and the measuring pressure head is in the same vertical direction.

The beneficial effect of adopting the above-mentioned further solution is to ensure that when the measuring indenter is measuring the inner hole, the measuring head is always vertical, and the measurement accuracy will not be inaccurate due to the deviation of the measurement.

Description of drawings

Fig. 1 is the structural representation of a kind of inner hole chamfering diameter measuring device of the present invention;

Fig. 2 is a schematic diagram of the use state of the inner hole chamfering diameter measuring device of the present invention;

Fig. 3 is a schematic cross-sectional view of the measured product of the present utility model;

Fig. 4 is a structural schematic diagram of a device for measuring an inner hole chamfering angle of the present invention.

In the accompanying drawings, the list of parts represented by each label is as follows:

1. Measuring platform, 2. Table base, 3. Dial indicator, 4. Measuring rod, 5. Measuring pressure head, 6. Locking device, 7. Thread, 8. Product, 9. Beam.

Detailed ways

The principles and features of the present utility model are described below in conjunction with the accompanying drawings, and the examples given are only used to explain the utility model, and are not used to limit the scope of the utility model.

As shown in Fig. 1, a schematic structural diagram of an inner hole chamfer diameter measuring device. It includes a measurement platform 1 and a table base 2 vertically fixed on it, and a horizontal beam 9 is fixed on one side of the upper part of the table base 2, and the projection of the beam 9 from top to bottom just falls on the measurement platform 1, The crossbeam 9 is fixed with a dial gauge 3 above one end of the table base 2, wherein the lower end of the dial gauge 3 runs through the crossbeam, and is connected with a downward measuring rod 4, the lower end of the measuring rod 4 The end is connected to the measuring indenter 5 through the thread 7, the end of the measuring indenter 5 is conical, and the tip of the conical is downward, and the conical angle of the measuring indenter 5 is larger or smaller than that of the product 8 to be measured Twice the inner hole chamfer angle.

As shown in FIG. 2 , a schematic view of the use state of the inner hole chamfer diameter measuring device; as shown in FIG. 3 , a schematic cross-sectional view of the measured product 8 .

The diameter of the inner hole chamfer is measured by using a measuring indenter 5 whose cone angle is greater than twice the inner hole chamfer angle of the product 8 to be measured.

The specific measurement method is as follows: assuming that the chamfer of the inner hole of the product 8 to be measured is α, a measuring indenter 5 with a conical angle of 2β is made, and β > α, which can prevent the tip of the measuring indenter 5 from going deep into the inner hole, and directly measure the indenter. The head 5 is connected with the dial gauge 3 to keep the measuring pressure head 5 vertical.

First, place the product 8 under test on the measuring platform, move the product 8, and make the measuring indenter 5 measure the heights of points A and B on both sides of the chamfer of the inner hole of the product 8 respectively, which are recorded as A and B, A The distance between the point and the B point can be expressed as product 8 outer hole diameter 2R, calculate the theoretical height C=abs(A+B)/2 of the measured product 8 inner hole center, wherein the function abs is to seek the absolute value;

Then, move the product 8 to the center of the inner hole and align it with the measuring indenter 5, so that the measuring indenter 5 moves down to the chamfer of the product 8 until it touches the upper edge of the inner hole and cannot move down any further. Refer to Figure 2 and read out The reading D of the dial indicator, at this moment, the depth of the insertion product inner hole of the measuring pressure head 5 is Y=D-C;

According to the relationship of trigonometric functions, the diameter W=2R=2Y·Tanβ of the chamfer of the inner hole is calculated.

As shown in FIG. 4 , a schematic structural diagram of an inner hole chamfering angle measuring device. The angle of the inner hole chamfer is measured by using the measuring indenter 5 whose cone angle is less than twice the inner hole chamfer angle of the product 8 to be measured.

The specific measurement method is as follows: Assuming that the chamfer of the inner hole of the product 8 to be tested is α, the measuring indenter 5 with a conical angle of 2β is selected, and β<α can make the tip of the measuring indenter 5 go deep into the inner hole, and the measuring indenter 5 is connected with the dial gauge 3 to keep the measuring pressure head 5 vertical.

Use the measuring indenter 5 that the above-mentioned taper angle is greater than twice the inner hole chamfer angle of the product 8 to be measured to measure the outer diameter 2R of the inner hole chamfer, and use the inner diameter micrometer to measure the inner hole diameter 2r; wherein the point E is set as The center of the inner hole, the horizontal distance between point E and point F is the inner radius r of the inner hole, the horizontal distance between point E and point B is the outer radius R of the inner hole, and the tip of the cone at the lower end of the measuring head 5 is set as point G , the distance between point G and point E of the center of the inner hole is h, and the vertical distance between point G and point B is the total depth H of the measuring head inserted into the product.

First, put the product 8 to be measured on the measurement platform, and make the measuring indenter 5 measure the heights of points A and B on both sides of the chamfer of the inner hole of the product 8 as A and B respectively, and calculate the inner diameter of the product 8 to be measured. The theoretical height C=abs(A+B)/2 of the center of the hole, wherein the function abs is to calculate the absolute value; then, the measuring pressure head 5 is penetrated into the inner hole of the product 8, so that the edge of the measuring pressure head 5 is against the upper end of the inner hole Edge, read the indication D from the dial gauge 3, then measure the total depth H=D-C of the indenter 5 inserted into the product 8;

It is known that the conical angle of the measuring indenter 5 is 2β and the radius of the inner hole is r, and the depth h=r/tanβ at which the measuring indenter enters the center of the inner hole is calculated according to the trigonometric function relationship;

Referring to Figure 2, the relative depth of the measuring indenter 5 at the chamfer is the vertical distance corresponding to point B and point F, expressed as △H=H-h, the difference between the outer diameter of the inner hole chamfer and the inner hole radius of the inner hole chamfer That is, the horizontal distance corresponding to point B and point F, expressed as △R=R-r;

Finally, the accurate chamfer angle α'=arctan(△R/△H) of the inner hole is calculated according to the relationship of trigonometric functions.

When the conical angle of the measuring indenter 5 is less than twice the angle of the inner hole of the product 8 to be measured, the measuring indenter 5 can go deep into the depth of the inner hole of the product 8 during measurement, and measure the surface of the product 8 and the depth of the inner hole respectively size, so as to calculate the height of the chamfer, and then calculate the angle of the chamfer through the trigonometric function, which can conveniently realize the non-destructive measurement of the chamfer angle of the inner hole; when the cone angle of the measuring indenter 5 is greater than the measured product 8 When the angle of the inner hole is twice that of the inner hole, the measuring rod 4 is driven to move up and down by the up and down movement of the measuring indenter 5, so that the pointer of the dial indicator 3 is shifted, and the measuring indenter 5 touches the part to be measured, passing the percentage The readings in Table 3 calculate the diameter of the chamfer. The device has the advantages of simple structure, convenient use and low cost, and is convenient for quickly and accurately detecting the angle and diameter of the chamfering of the inner hole of the product on site.

The above descriptions are only preferred embodiments of the present utility model, and are not intended to limit the present utility model. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present utility model shall be included in this utility model. within the scope of protection of utility models.

Claims (5)

1. A kind of inner hole chamfering measuring device, it is characterized in that, comprise measuring platform and the table seat that is fixed vertically on it, the one side of described table seat middle and upper part is fixed with the crossbeam that places horizontally, and described crossbeam is away from all A dial gauge is fixed above one end of the meter seat, the lower end of the dial gauge runs through the beam, and is connected with a downward measuring rod, the end of the lower end of the measuring rod is connected with a measuring pressure head, and the measuring pressure The end of the lower end of the head is conical, and the tip of the cone is downward, and the conical angle of the measuring indenter is larger or smaller than twice the chamfering angle of the inner hole of the product to be measured. 2. A kind of inner hole chamfering measuring device according to claim 1, characterized in that, the end of the beam is provided with a locking device, and the lower end of the dial indicator is fixed on the beam away from the above one end of the table base. 3. A device for measuring inner hole chamfering according to claim 2, wherein the locking device adopts a bolt tightening method. 4 . The device for measuring inner hole chamfering according to claim 1 , wherein the measuring indenter and the measuring rod are fixedly connected by threads. 5 . 5 . The device for measuring inner hole chamfering according to any one of claims 1 to 4 , wherein the dial indicator is connected to the measuring rod and the measuring indenter in the same vertical direction. 6 .