CN108317938B

CN108317938B - Special measuring tool for involute worm pressure angle

Info

Publication number: CN108317938B
Application number: CN201710045270.8A
Authority: CN
Inventors: 王冬云; 蔡建程; 宋旸
Original assignee: Zhejiang Normal University CJNU
Current assignee: Zhejiang Normal University CJNU
Priority date: 2017-01-16
Filing date: 2017-01-16
Publication date: 2023-05-12
Anticipated expiration: 2037-01-16
Also published as: CN108317938A

Abstract

The invention discloses a special measuring tool for an involute worm pressure angle, which comprises a measuring tool reference block, a trapezoidal spiral lead angle gauge block and two standard pressure angle gauge blocks. The measuring jig reference block is in an I shape and is assembled with the trapezoidal spiral lift angle gauge block, four side surfaces of the trapezoidal spiral lift angle gauge block are perpendicular to the I-shaped plane of the measuring jig reference block, and the included angle between two inclined surfaces and two parallel surfaces of the trapezoidal spiral lift angle gauge block is equal to the spiral lift angle of the worm and is used as a measuring reference surface; the standard pressure angle gauge block is equivalent to one tooth of a standard rack meshed with the screw channel, the clamping angle surface of the standard pressure angle gauge block is twice of the pressure angle of the worm, the standard pressure angle gauge block is designed according to the size of the pressure angle of the worm, corresponding standard pressure angle gauge blocks are selected for measurement aiming at the worms with different pressure angles, and the standard pressure angle gauge block and the measuring jig reference block are combined for use, so that the measurement is simple and quick.

Description

Special measuring tool for involute worm pressure angle

Technical Field

The invention relates to a special measuring tool for an involute worm pressure angle, and belongs to the technical field of mechanical product measurement.

Background

Involute worms are very common mechanical parts, the main structure of the involute worms is a special tooth-shaped thread, the pressure angle and the screw lead angle are very important two parameters, the modulus of the worm is determined during production, the screw lead angle can be directly ensured by a machine tool, the lead angle can be measured, the pressure angle measurement can be measured by a gear measuring center, a common small factory has no measuring center, the involute worm cannot be detected on the production site, and the measurement of a entrusted measuring mechanism is time-consuming and troublesome and cannot meet the actual requirements.

Disclosure of Invention

In view of the problems existing above, the invention aims to provide a special measuring tool for the involute worm pressure angle, which has the advantages of ingenious structure, simple and convenient operation and higher precision.

In order to achieve the above purpose, the invention adopts the following technical scheme:

the invention relates to a special measuring tool for an involute worm pressure angle, which comprises a measuring tool reference block, a screw lift angle gauge block and two standard pressure angle gauge blocks. The measuring jig reference block is in an I shape and is assembled with the trapezoidal spiral lift angle gauge block, four side surfaces of the trapezoidal spiral lift angle gauge block are perpendicular to the I-shaped plane of the measuring jig reference block, and the included angle between two inclined surfaces and two parallel surfaces of the trapezoidal spiral lift angle gauge block is equal to the spiral lift angle of the worm and is used as a measuring reference surface; the standard pressure angle gauge block is equivalent to one tooth of a standard rack meshed with a screw channel, the clamping angle surface of the standard pressure angle gauge block is twice of the pressure angle of a worm, the standard pressure angle gauge block is designed according to the size of the pressure angle of the worm, corresponding standard pressure angle gauge blocks are selected for measurement aiming at the worms with different pressure angles, the standard pressure angle gauge block is combined with a reference block of a measuring jig for use, firstly, two standard pressure angle gauge blocks with the same specification are placed on the bottom surface of the reference block of the measuring jig in an I shape, then a measured workpiece is placed on the two standard pressure angle gauge blocks, the standard pressure angle gauge blocks are pressed by hands, the standard pressure angle gauge blocks are meshed with the screw channel, the excircle of the measured workpiece is stuck on a parallel surface of the trapezoidal spiral lifting angle gauge block, the standard pressure angle gauge block is stuck flatly, the bottom edge of the inclined surface of the standard pressure angle gauge block is abutted on the inclined surface of the spiral lifting angle gauge block, and the gap delta beta is measured, and the measured. The measurement is simple and quick.

The special measuring tool for the involute worm pressure angle has the following advantages:

1. the structure is ingenious, and the operation is simple and convenient;

2. the precision is high;

3. the real-time online measurement is realized, the cost is zero, and the period is short;

4. the universality is strong, and the worms with different specifications can be detected only by replacing the standard pressure angle gauge block and the spiral lift angle gauge block;

drawings

FIG. 1 is a schematic diagram of a special measuring tool for involute worm pressure angle

FIG. 2 is a top view of FIG. 1

FIG. 3 is a schematic view of the structure of the member 1 of FIG. 1

In the figure: 1-measuring jig reference block 2-standard pressure angle gauge block 3-trapezoid spiral lift angle gauge block 4-measured workpiece

Detailed Description

The technical scheme of the present invention is further specifically described below by way of examples and with reference to the accompanying drawings, but the scope of the present invention is not limited thereto.

Referring to fig. 1, 2 and 3, the special measuring tool for the involute worm pressure angle comprises a measuring tool reference block 1, a screw lift angle gauge block 3 and two standard pressure angle gauge blocks 2. The measuring jig reference block 1 is in an I shape and is assembled with the trapezoidal spiral lead angle gauge block 3, the four side faces of the trapezoidal spiral angle gauge block 3 are perpendicular to the I-shaped plane of the measuring jig reference block 1, and the included angle between two inclined planes and two parallel planes of the trapezoidal spiral lead angle gauge block 3 is equal to the lead angle of the worm and is used as a measuring reference plane; the standard pressure angle gauge block 2 is equivalent to one tooth of a standard rack meshed with a screw channel, the clamping angle surface of the standard pressure angle gauge block 2 is twice of the pressure angle of a worm, the standard pressure angle gauge block 2 is designed according to the pressure angle of the worm, corresponding standard pressure angle gauge blocks 2 are selected for measuring the worms with different pressure angles, the standard pressure angle gauge block 2 and the trapezoid spiral lift angle gauge block 3 are combined for use in measurement, firstly, two standard pressure angle gauge blocks 2 with the same specification are placed on the H-shaped bottom surface of a reference block 1 of a measurement jig, then a measured workpiece 4 is placed on the two standard pressure angle gauge blocks 2, the standard pressure angle gauge block 2 is meshed with the worm screw channel by hand pressing, the excircle of the measured workpiece 4 is attached to a parallel surface of the trapezoid spiral lift angle gauge block 3, the worm is attached to the parallel surface, the inclined surface of the standard pressure angle gauge block 2 is enabled to lean against the inclined surface of the trapezoid spiral lift angle gauge block 3 by moving the worm, and a gap delta beta is measured, so that the pressure angle of the measured worm 4 can be calculated. The measurement is simple and quick.

The working principle and the specific working mode of the invention are as follows:

the invention relates to a special measuring tool for the pressure angle of an involute worm, which is measured according to the principle that the pressure angle at a pitch circle of a screw is equal to the pressure angle of a meshed standard rack, if the pressure angle of the processed screw is increased, when the processed screw is meshed with the standard rack, the diameter of a meshing point of the screw is smaller than the diameter of the pitch circle, the screw lift angle is increased, vice versa, and the pressure angle and the screw lift angle have a fixed relation, so that the pressure angle can be calculated only by measuring the change delta beta of the screw lift angle of the screw.

[ example ]

The method comprises the steps of measuring the pressure angle of a worm screw channel, firstly, selecting two standard pressure angle gauge blocks 2 with proper specifications to be placed on a measuring jig reference block 1, then meshing a measured worm 4 screw channel with the standard pressure angle gauge blocks 2, enabling the outer circle of the worm to be attached to the parallel surface of a trapezoidal spiral angle gauge block 3, enabling the inclined bottom edge of the standard pressure angle gauge block 2 to lean against the inclined surface on one side of the trapezoidal spiral angle gauge block 3, measuring the gap delta beta between the two inclined surfaces, and calculating the pressure angle of the worm screw channel.

Claims

1. The utility model provides a special measuring tool of involute worm pressure angle, including measuring jig benchmark piece (1), trapezoidal spiral lead angle gauge block (3) and two standard pressure angle gauge blocks (2), its characterized in that: the measuring jig reference block (1) is in an I shape and is assembled with the trapezoidal spiral lead angle gauge block (3), four side surfaces of the trapezoidal spiral lead angle gauge block (3) are perpendicular to the I-shaped plane of the measuring jig reference block (1), and the included angle between two inclined planes and two parallel planes of the trapezoidal spiral lead angle gauge block (3) is equal to the spiral lead angle of the worm and is used as a measuring reference plane; the standard pressure angle gauge block (2) is equivalent to one tooth of a standard rack meshed with a screw channel, the clamping angle surface of the standard pressure angle gauge block (2) is twice as large as the pressure angle of a worm, the standard pressure angle gauge block (2) is designed according to the pressure angle of the worm, the corresponding standard pressure angle gauge block (2) is selected for measurement aiming at the worm with different pressure angles, the standard pressure angle gauge block (2) is combined with a measuring jig reference block (1) for use, firstly, the standard pressure angle gauge block (2) with the same specification is placed on the bottom surface of the measuring jig reference block (1) in an I shape, then a measured workpiece (4) is placed on the two standard pressure angle gauge blocks (2) and is pressed by a hand, the standard pressure angle gauge block (2) is meshed with the worm screw channel, the excircle of the measured workpiece (4) is stuck on a parallel surface of the trapezoidal screw angle gauge block (3), a slope is made to be flat, a slope of the standard pressure angle gauge block (2) leans against the trapezoidal screw angle of elevation process, a clearance delta beta is measured, the measured according to the pressure index angle of the screw channel is equal to the pressure index point of the screw channel, and the diameter of the measured spiral angle gauge block is changed, and the diameter of the measured spiral angle gauge is changed is increased, and the diameter of the measured spiral angle gauge is changed, and the spiral angle gauge curve is changed, and the diameter is compared with the spiral angle gauge curve, and the spiral angle gauge curve is measured.