Rapid detection clamp for symmetry degree of fuse holes of bolt parts

Abstract

The utility model discloses a quick detection clamp for the symmetry degree of a fuse hole of a bolt part, which comprises a machine body (1), a sliding block (2), an I-shaped piece (3), an eccentric shaft sleeve (4), a standard bolt (5), a stay bolt (6) and a baffle (7), and is characterized in that the sliding block (2) is placed in a groove arranged in the middle of the machine body (1), the upper end of the machine body (1) is clamped into the I-shaped piece (3), the baffle (7) is covered, a bolt is screwed into the baffle (7) for fixation, and the stay bolt (6) is screwed into the baffle (7). The lower end of the stay bolt (6) is rotatably connected with an I-shaped piece (3), an eccentric shaft sleeve (4) is inserted into the I-shaped piece (3), and a standard bolt (5) is inserted into the eccentric shaft sleeve (4). The fuse hole detection device is low in detection cost, high in detection precision, high in detection efficiency, convenient to use and capable of meeting detection of fuse holes of different specifications.

Description

Technical Field

[0001] The utility model belongs to the technical field of bolt detection, in particular to a fast detection fixture for the symmetry of fuse holes of bolt parts. Background Art

[0002] At present, the symmetry detection method of fuse holes of bolt parts is to use auxiliary measuring tools such as dividing heads, height gauges, platforms, core rods, and protective bushings. First, use a vernier caliper to measure the fuse hole diameter and the outer diameter of the polished rod, then select a suitable core rod and bushing to install on the part, then clamp the part with the dividing head, use the height gauge and dial indicator to level the core rod, record the measured dimensions, rotate the dividing head 180 degrees, repeat the previous operation to measure and record the dimensions, and finally obtain the specific value of the symmetry error through calculation to determine whether the part is qualified. Due to the wide variety and specifications of bolt parts and the large quantity, the traditional detection method has problems such as high detection cost, low detection accuracy, low detection efficiency, and inconvenience. Summary of the invention

[0003] The purpose of the utility model is to overcome the above shortcomings and provide a fast detection fixture for the symmetry of fuse holes of bolt parts which has low detection cost, high detection accuracy, high detection efficiency, is easy to use, and can meet the requirements of fuse hole detection of different specifications.

[0004] The utility model discloses a fast detection fixture for the symmetry of fuse holes of bolt-type parts, comprising a machine body, a slider, a work-shaped part, an eccentric shaft sleeve, a standard latch, a tie rod bolt and a baffle, and is characterized in that the slider is placed in a groove arranged in the middle of the machine body, the upper end of the machine body is clamped into the work-shaped part cover, the baffle is screwed in and fixed with bolts, the tie rod bolt is screwed into the baffle, the lower end of the tie rod bolt can be rotatably connected to the work-shaped part, the eccentric shaft sleeve is inserted into the work-shaped part, and the standard latch is inserted into the eccentric shaft sleeve.

[0005] The side of the I-shaped piece is provided with a slot and the upper surface is provided with a scale, and the I-shaped piece can move up and down at the upper end of the machine body.

[0006] The slide block is provided with a V-shaped groove, and the slide block can slide in a groove provided in the middle part of the machine body.

[0007] The eccentric sleeve can rotate on the I-shaped piece.

[0008] The standard latch can rotate on the eccentric bushing.

[0009] Compared with the prior art, the utility model has obvious beneficial effects; from the above technical scheme, it can be known that: by placing a slider in the groove set in the middle of the machine body, the upper end of the machine body is clamped into the I-shaped piece cover, the baffle is screwed in and fixed with bolts, the baffle is screwed into the tie rod bolt, the lower end of the tie rod bolt can be rotatably connected to the I-shaped piece, the eccentric sleeve is inserted into the I-shaped piece, and the standard pin is inserted into the eccentric sleeve. The axis of the hole on the right side of the I-shaped piece is perpendicular to and intersects with the V-shaped slider; the left side part is matched with the clearance of the machine body guide rail, and the matching tolerance is controlled within 0.03mm as required. Through the adjustment of the tie rod bolt, the I-shaped piece can slide up and down along the machine body guide rail, so as to adapt to the detection of screws of different specifications; the I-shaped piece is engraved with equally divided scales along the semicircular direction of the hole, the starting scale is zero, and the scale interval is 5°. The eccentric sleeve is installed on the right hole of the workpiece, using a clearance fit with a fit tolerance of less than 0.02mm. When the axis of the eccentric sleeve hole is vertical and just intersects with the axis of the V-shaped slider, its vertical direction is designed to be zero and coincides with the zero position line of the workpiece. By calculating the relationship between the rotation angle of the eccentric sleeve and the radial displacement of the hole axis, it is determined whether the symmetry of the test is within the qualified range. The pin is designed as a three-level step pin. The size of the small end part is the minimum limit size of the fuse hole, the size of the middle end part is the size that matches the eccentric hole, and the large end part is designed as a handle for easy insertion and removal. The step design of the pin can meet the requirements of fuse holes of different specifications. During inspection, only the pin needs to be replaced without replacing the eccentric bushing, which can meet the measurement requirements and reduce the production of auxiliary parts. In addition, according to the principle of the maximum entity of the measured element, the size of the small end part of the step pin is designed to be the minimum limit size of the fuse hole to meet the measurement requirements of the part. The angular displacement of the eccentric sleeve is converted into the radial displacement of the eccentric hole (the displacement perpendicular to the axis of the V-shaped slider), and the radial displacement of the eccentric hole is used to determine whether the symmetry error of the bolt under test is within the qualified range. The detection cost is low, the detection accuracy is high, the detection efficiency is high, and it is easy to use, and it can meet the detection of fuse holes of different specifications. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 It is a structural schematic diagram of the utility model;

[0011] Figure 2 It is the front view of the utility model;

[0012] Figure 3 It is a left view of the utility model;

[0013] Figure 4 It is an exploded view of the utility model;

[0014] Figure 5 It is the use state of the utility model Figure 1 ;

[0015] Figure 6 It is the use state of the utility model Figure 2 ;

[0016] Figure 7 It is the use state of the utility model Figure 3 .

[0017] Marking in the figure

[0018] 1. Machine body; 2. Slider; 3. I-shaped part; 4. Eccentric sleeve; 5. Standard latch; 6. Pull rod bolt; 7. Baffle; 8. Bolt to be tested. DETAILED DESCRIPTION

[0019] The specific implementation methods, structures, features and functions of the present invention are described in detail below in conjunction with the accompanying drawings and preferred embodiments.

[0020] The purpose of the utility model and the solution of its main technical problems are achieved by adopting the following technical solutions:

[0021] The utility model discloses a fast detection fixture for the symmetry of fuse holes of bolt-type parts, comprising a body 1, a slider 2, a work-shaped piece 3, an eccentric shaft sleeve 4, a standard pin 5, a tie rod bolt 6 and a baffle 7, and is characterized in that: the slider 2 is placed in a groove arranged in the middle of the body 1, the upper end of the body 1 is clamped into the work-shaped piece 3, the baffle 7 is covered and screwed into the bolt for fixing, the tie rod bolt 6 is screwed into the baffle 7, the lower end of the tie rod bolt 6 can be rotatably connected to the work-shaped piece 3, the eccentric shaft sleeve 4 is inserted into the work-shaped piece 3, the standard pin 5 is inserted into the eccentric shaft sleeve 4, a clamping groove is arranged on the side of the work-shaped piece 3, and a scale is arranged on the upper side, the work-shaped piece 3 can move up and down at the upper end of the body 1, the slider 2 is arranged with a V-shaped groove, the slider 2 can slide in the groove arranged in the middle of the body 1, the eccentric shaft sleeve 4 can rotate on the work-shaped piece 3, and the standard pin 5 can rotate on the eccentric shaft sleeve 4.

[0022] During the inspection, the bolt 8 to be tested is placed on the V-groove provided on the slider 2, with one end of the fuse hole facing upwards, the pull rod bolt 6 is rotated to make the I-shaped piece 3 move downward and contact the bolt 8 to be tested, the standard pin 5 is inserted into the hole of the eccentric bushing 4, and the bolt 8 to be tested is rotated and axially moved at the same time, so that the fuse hole and the standard pin 5 are in the same line or parallel. If the lower end of the standard pin 5 can pass through the fuse hole smoothly, it is judged that the symmetry is qualified; if the standard pin 5 cannot pass through the fuse hole, the eccentric bushing 4 is rotated at an appropriate angle according to the size of the symmetry tolerance value of the fuse hole, and the bolt 8 to be tested is axially moved at the same time to find the passing point of the standard pin 5. As long as it is within the two limit scales (the limit scale refers to the scale value corresponding to the symmetry limit deviation), the standard pin 5 can pass through the fuse hole, and the symmetry can be judged to be qualified. For example, when the fuse hole symmetry tolerance is 0.1mm, it means that the fuse hole axis can be offset by 0.05mm up and down along the direction perpendicular to the thread axis. When the eccentricity of the eccentric sleeve 4 is measured to be 0.57mm, it can be obtained that the center offset of the hole is 0.05mm for every 5° rotation of the eccentric sleeve 4. Therefore, when the eccentric hole 4 is within the range of two extreme angles (5° clockwise and 5° counterclockwise), if the standard pin 5 can pass through the bolt 8 fuse hole through the eccentric hole, it means that the hole symmetry meets the requirements, otherwise, it does not meet the requirements.

[0023] The above description is only a preferred embodiment of the present invention and does not constitute any form of limitation to the present invention. Any simple modification, equivalent change and modification made to the above embodiment based on the technical essence of the present invention without departing from the technical solution of the present invention still fall within the scope of the technical solution of the present invention.

Claims

1. A fast detection fixture for the symmetry of fuse holes of bolt-type parts, comprising a body (1), a slide block (2), a workpiece (3), an eccentric sleeve (4), a standard latch (5), a pull rod bolt (6), and a baffle (7), characterized in that; A slide block (2) is placed in a groove provided in the middle of the machine body (1), the upper end of the machine body (1) is clamped into the I-shaped piece (3), a baffle plate (7) is covered and screwed in to fix the baffle plate (7), a tie rod bolt (6) is screwed into the baffle plate (7), the lower end of the tie rod bolt (6) is rotatably connected to the I-shaped piece (3), an eccentric shaft sleeve (4) is inserted into the I-shaped piece (3), and a standard latch (5) is inserted into the eccentric shaft sleeve (4).

2. A fast detection fixture for the symmetry of fuse holes of bolt-like parts as claimed in claim 1, characterized in that; The I-shaped piece (3) is provided with a slot on its side and a scale on its top, and the I-shaped piece (3) can move up and down on the upper end of the machine body (1).

3. A fast detection fixture for the symmetry of fuse holes of bolt-like parts as claimed in claim 1, characterized in that: The slider (2) is provided with a V-shaped groove, and the slider (2) can slide in a groove provided in the middle of the machine body (1).

4. A fast detection fixture for the symmetry of fuse holes of bolt-like parts as claimed in claim 1, characterized in that: The eccentric shaft sleeve (4) can rotate on the I-shaped piece (3).

5. A fast detection fixture for the symmetry of fuse holes of bolt-like parts as claimed in claim 1, characterized in that: The standard latch pin (5) is rotatable on the eccentric shaft sleeve (4).

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