CN104501703A - Novel detecting device for thread hole to end surface verticality - Google Patents

Abstract

The invention belongs to the detection equipment in the field of mechanical processing, and proposes a novel threaded hole-to-end perpendicularity detection device. Taper threaded parts, a measuring rod is provided on the lower end surface of the rotating disk of the rotating sleeve, and a dial indicator is provided on the other side of the fixed seat through a copper sleeve. Contact, when measuring, connect the lower end of the rotating shaft with the threaded hole of the workpiece, the probe of the measuring rod is in contact with the end surface of the threaded hole of the workpiece, the difference between the maximum number and the minimum number displayed on the dial indicator is the measured verticality, which has the function of using The advantages of convenience, good adaptability and accurate measurement.

Description

A new type of measuring device for verticality between threaded holes and end faces

technical field

The invention belongs to the field of mechanical processing and relates to a detection device, in particular to a novel detection device for perpendicularity between threaded holes and end faces.

Background technique

In the process of machining, in order to ensure that the corresponding performance indicators of the seal are achieved after the components are combined, very high requirements are put forward for the perpendicularity between the threaded hole of the workpiece and the end surface of the threaded hole, and the maximum value of the perpendicularity cannot exceed 0.06.

The existing methods for detecting the perpendicularity between the threaded hole of the workpiece and the end surface of the threaded hole mainly include:

1. Three-coordinate detection. The shape of the three-coordinate measuring head is a sphere. When measuring the inner hole of the threaded hole, eight measuring points need to be taken. Because the pitch of different threads is different, it may be taken from the crest or between the teeth, which will easily cause inaccurate measurement; for the requirements In the case of high precision, three-coordinate detection is not applicable.

2. Feeler gauge detection. Using a simple measuring column, a square, and a feeler gauge to measure the verticality of the threaded hole of the workpiece, the detection data obtained are often inaccurate.

3. For some workpieces that are not easy to move or have complex shapes, they can only be guaranteed by tooling, and the exact value of the verticality of the threaded holes cannot be detected, which will affect the quality of the product and cause some losses to the enterprise.

Accurately and conveniently measuring the verticality between the threaded hole of the workpiece and the end surface of the threaded hole, ensuring the authenticity and accuracy of the measurement results, and overcoming the defects of the existing technology have been a long-term technical subject in the field of mechanical processing.

technical content

The object of the present invention is to research a new type of verticality detection device for threaded hole to end face, which can accurately and conveniently detect the perpendicularity between the threaded hole of workpiece and the end face of threaded hole, and further guarantee the product quality.

The technical solution adopted by the present invention is to design a new type of threaded hole-to-end perpendicularity detection device. Its structure includes: a fixed seat, a rotating shaft, and a measuring rod. The lower part of the rotating shaft is covered with a rotating sleeve, and the lower end of the rotating shaft is connected with a tapered screw. On one side of the lower end surface of the rotating disk of the rotating sleeve, a measuring rod with a measuring head in the form of a cone is installed, and is fastened on the other side of the fixed seat. There is a copper sleeve, the stem of the dial indicator is parallel to the rotating shaft, and the sleeve is set in the copper sleeve. The lower end of the dial stem of the dial indicator is conical, and the tip of the cone is in contact with the upper surface of the rotating disk. When in use, the taper at the lower end of the rotating shaft The external thread of the threaded part is closely connected with the threaded hole of the workpiece to be tested, the center of rotation of the rotating shaft coincides with the center of the threaded hole of the workpiece to be measured, and the conical tip of the measuring rod is in contact with the end surface of the threaded hole of the workpiece to be measured.

In the above structure, the tapered threaded part connected to the lower end of the rotating shaft adopts replaceable and movably connected tapered threaded parts of different specifications, so as to adapt to the detection of workpieces with different thread pitches.

The detection device of the present invention utilizes the conical tip measuring head of the measuring rod to pass the information sensed to the threaded hole and the end surface of the threaded hole of the workpiece to be measured through the contact between the upper end surface of the rotating sleeve rotating disk and the lower end of the dial indicator rod. The cone tip is sensed on the dial indicator, and then the value displayed on the dial indicator is recorded and calculated to obtain the perpendicularity data of the threaded hole of the measured workpiece to the end surface of the threaded hole. When measuring, when the conical tip of the measuring rod touches the end surface of the threaded hole of the workpiece to be measured, record the initial value displayed by the dial indicator, rotate the rotating disk of the rotating sleeve for one week, and record the value displayed by the dial indicator during the rotation process. value, find out the maximum value and minimum value, and calculate the difference between the maximum value and the minimum value, and the difference obtained is the value of the verticality of the threaded hole of the workpiece to the end surface of the threaded hole.

Compared with the prior art, the novel threaded hole-to-end perpendicularity detection device of the present invention has the remarkable advantages of convenient use, good adaptability, accurate measurement results, and effective improvement of workpiece product quality. For some workpieces that are not easy to move or have complex shapes, and workpieces with different threaded holes, it is also convenient to detect the verticality of the threaded hole to the end face of the threaded hole.

The prototype has been tried many times, no matter the small workpiece or the large workpiece, the perpendicularity value of the threaded hole of the workpiece to the end face of the threaded hole is no more than 0.06, which meets the relevant performance requirements, effectively improves the quality of the product, and significantly reduces the cost loss.

Description of drawings

Fig. 1 shows a schematic structural view of a novel threaded hole-to-end perpendicularity detection device of the present invention.

Detailed ways

The specific structure of the present invention is further described in conjunction with the accompanying drawings and embodiments.

An embodiment of a novel threaded hole-to-end perpendicularity detection device of the present invention, see Fig. 1, its structure includes: fixed seat 4, rotating shaft 7, measuring rod 1, dial indicator 5, copper sleeve 2, set screws 3, 6 , a rotating sleeve 8, wherein the upper part of the rotating shaft 7 is fastened to one side of the fixed seat 4 through the set screw 6, and the rotating sleeve 8 is set on the lower part of the rotating shaft 7, and a replaceable movable connection taper thread is connected to the lower end of the rotating shaft 7 Piece 7.1, on one side of the lower end surface of the rotating disk 8.1 of the rotating sleeve, a measuring head is provided with a conical measuring rod 1, and on the other side of the fixed seat 4, a copper sleeve 2 is fastened by a set screw 3, percent The gauge rod of gauge 5 is parallel to the rotating shaft 7 and is sheathed in the copper sleeve 2. The gauge rod lower end 5.1 of the dial indicator 5 is conical, and the tip of the cone is in contact with the upper surface of the rotating disk 8.1. When in use, when the large workpiece is not easy to move, screw the taper threaded part 7.1 at the lower end of the rotating shaft 7 into the threaded hole (omitted in the figure) of the workpiece to be tested for close connection, so that the rotation center of the rotating shaft 7 and the end surface of the threaded hole of the workpiece to be measured The centers coincide, and the conical tip probe of the measuring rod 1 is in contact with the threaded hole section of the workpiece to be measured. During measurement, after the conical tip probe of the measuring rod 1 contacts the end face of the threaded hole of the workpiece to be measured, record the reading displayed on the dial indicator 5, rotate the rotating disk 8.1 for one week, and record the reading displayed on the dial indicator 5 during the rotation. Maximum and minimum readings, calculate the difference between the maximum number and the minimum number in the readings, and the obtained value is the verticality of the threaded hole of the workpiece to the end surface of the threaded hole.

Claims (2)

1. face, Novel spiral pit opposite end testing apparatus for verticality, comprise holder, rotating shaft, measuring stick, it is characterized in that: rotating shaft top is fastened on side in holder by securing member, rotary sleeve is arranged with in the bottom of rotating shaft, taper thread part is connected with in rotating shaft lower end, the measuring stick that gauge head is cone is provided with in the side, rotating disc lower surface of rotary sleeve, opposite side in holder is fastened with copper sheathing, the table bar of dial gauge and rotating shaft walk abreast, be set in copper sheathing, the table bar lower end of dial gauge is coniform, epiconus contacts with the upper surface of rotating disc, during use, the external thread of the taper thread part of rotating shaft lower end and the threaded hole phase close-coupled of measured workpiece, the centre of gyration of rotating shaft and the screw center superposition of measured workpiece, the epiconus gauge head of measuring stick contacts with the threaded hole end face of measured workpiece.

2. face, a kind of Novel spiral pit opposite end according to claim 1 testing apparatus for verticality, is connected to the taper thread part of rotating shaft lower end, adopts the taper thread part of the different size of removable flexible connection described in it is characterized in that.