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CN-121977496-A - Eccentric strain measurement device for tubular workpiece

CN121977496ACN 121977496 ACN121977496 ACN 121977496ACN-121977496-A

Abstract

The invention relates to a tubular workpiece eccentric strain measurement device which comprises a base body, a sliding block and a detection arm, wherein the base body is fixedly connected with a reference arm, the reference arm is provided with a positioning hole, the base body is provided with a containing cavity and a guide groove, the guide groove is communicated with the containing cavity, the sliding block is fixedly connected with a main power source, the left side and the right side of the sliding block are sleeved in the guide groove, the main power source is contained in the containing cavity, the sliding block is hinged with a connecting rod through a rotating shaft, a transmission mechanism is further arranged between an output shaft of the main power source and the rotating shaft, the connecting rod is hinged with the positioning arm, the positioning arm is hinged with the detection arm, and a strain sensor is arranged on the surface of the detection arm. By adopting the technical scheme provided by the invention, one end of the tubular workpiece is sleeved in the positioning hole, the main power source drives the connecting rod and the positioning arm to swing, so that the detection arm is abutted against the other end of the tubular workpiece, and the relative strain deformation between the two ends of the tubular workpiece can be detected and acquired through the strain sensor arranged on the surface of the detection arm, thereby laying a foundation for ensuring the correct assembly of the tubular workpiece.

Inventors

  • ZHAO KAI
  • TIAN JIAXING
  • XU GUANGFEI
  • Peng Youlei

Assignees

  • 中国航发贵阳发动机设计研究所

Dates

Publication Date
20260505
Application Date
20260106

Claims (10)

  1. 1. The eccentric strain measurement device for the tubular workpiece is characterized by comprising a base body (1), a sliding block (2) and a detection arm (3), wherein one end of the base body (1) is fixedly connected with one end of a reference arm (4), the other end of the reference arm (4) is provided with a positioning hole (5), a containing cavity (6) is arranged in the base body (1), guide grooves (7) are further formed in the left side and the right side of the base body (1), the guide grooves (7) are communicated with the containing cavity (6), the sliding block (2) is fixedly connected with a main power source (8), the left side and the right side of the sliding block (2) are sleeved in the guide grooves (7), the sliding block (8) is contained in the containing cavity (6), the sliding block (2) is hinged with one end of a connecting rod (9) through a rotating shaft (10), a transmission mechanism is further arranged between an output shaft of the main power source (8) and the rotating shaft (10), the other end of the connecting rod (9) is communicated with the containing cavity (6), the other end of the positioning arm (11) is hinged with the detection arm (11), and the other end of the positioning arm (11) is hinged with the detection arm (3), and the other end of the positioning arm (11) is arranged on the surface of the base body (3), and the strain sensor is arranged on the surface of the base.
  2. 2. A tubular workpiece eccentric strain measurement device as in claim 1 wherein the primary power source (8) is an electric motor.
  3. 3. A tubular workpiece eccentric strain measurement device as recited in claim 1, wherein the transmission mechanism is a belt transmission mechanism, a chain transmission mechanism or a gear transmission mechanism.
  4. 4. A tubular workpiece eccentric strain measurement device as set forth in claim 1, wherein the slider (2) is further fixedly connected with a secondary power source, and the tail end of an output shaft of the secondary power source abuts against the inner wall surface of the accommodating cavity (6).
  5. 5. A tubular workpiece eccentric strain measurement device as set forth in claim 4, wherein the output shaft of the secondary power source is axially parallel to the depth direction of the accommodating chamber (6).
  6. 6. A tubular workpiece eccentric strain measurement device as in claim 1, 4 or 5 wherein the secondary power source is a cylinder.
  7. 7. A tubular workpiece eccentric strain measuring device as set forth in claim 1, wherein the number of the detecting arms (3) is two, and the two detecting arms (3) are arranged on the left and right sides of the positioning arm (11).
  8. 8. A tubular workpiece eccentric strain measuring device as claimed in claim 1 or 7, wherein the detecting arm (3) is elongated and has a circular arc-shaped track line in its longitudinal direction.
  9. 9. A tubular workpiece eccentric strain measurement device as in claim 1 wherein the locating hole (5) is a circular through hole.
  10. 10. A tubular workpiece eccentric strain measurement device as set forth in claim 1 wherein said spindle (10) is replaced with a rivet.

Description

Eccentric strain measurement device for tubular workpiece Technical Field The invention belongs to the technical field of engineering measurement, and particularly relates to a tubular workpiece eccentric strain measurement device. Background Because of the precision of the manufacturing equipment, the parts will have deviation after being manufactured and formed, for the tubular workpiece, if the deviation of the two ends of the tubular workpiece is larger, the eccentric error of the two ends of the tubular workpiece is too large, so that the tubular workpiece cannot be assembled or connected with other parts at the two ends of the tubular workpiece correctly, and in order to prevent the tubular workpiece from being assembled incorrectly, it is imperative to develop an eccentric strain measuring device for the tubular workpiece. Disclosure of Invention In order to solve the technical problems, the invention provides a tubular workpiece eccentric strain measuring device. The invention provides a tubular workpiece eccentric strain measurement device which comprises a base body, a sliding block and a detection arm, wherein one end of the base body is fixedly connected with one end of a reference arm, the other end of the reference arm is provided with a positioning hole, a containing cavity is arranged in the base body, guide grooves are further formed in the left side and the right side of the base body and are communicated with the containing cavity, the sliding block is fixedly connected with a main power source, the left side and the right side of the sliding block are sleeved in the guide grooves, the main power source is accommodated in the containing cavity, the sliding block is hinged with one end of a connecting rod through a rotating shaft, a transmission mechanism is further arranged between an output shaft of the main power source and the rotating shaft, the other end of the connecting rod is hinged with one end of a positioning arm, the other end of the positioning arm is hinged with the detection arm, the positioning arm and the detection arm are both arranged at the other end of the base body, and a strain sensor is further arranged on the surface of the detection arm. The primary power source is an electric motor. The transmission mechanism is a belt transmission mechanism, a chain transmission mechanism or a gear transmission mechanism. The sliding block is fixedly connected with the auxiliary power source, and the tail end of an output shaft of the auxiliary power source abuts against the inner wall surface of the accommodating cavity. The axial direction of the output shaft of the auxiliary power source is parallel to the depth direction of the accommodating cavity. The auxiliary power source is a cylinder. The number of the detecting arms is two, and the two detecting arms are respectively arranged at the left side and the right side of the positioning arm. The detecting arm is in a strip shape, and the length direction of the detecting arm is a circular arc-shaped track line. The positioning holes are round through holes. The shaft may be replaced with rivets. The invention has the beneficial effects that after one end of the tubular workpiece is sleeved in the positioning hole and is used as a reference, the main power source drives the connecting rod and the positioning arm to swing, so that the detection arm is abutted against the other end of the tubular workpiece, and the strain sensor arranged on the surface of the detection arm can detect and acquire the relative strain deformation between the two ends of the tubular workpiece, thereby laying a foundation for ensuring the correct assembly of the tubular workpiece. Drawings FIG. 1 is a front view of the present invention; FIG. 2 is an exploded view of the present invention; FIG. 3 is an isometric view of a slider and primary power source of the present invention; FIG. 4 is an isometric view of a positioning arm and a detection arm of the present invention; FIG. 5 is an isometric view of a slider of the present invention; FIG. 6 is an isometric view of the primary power source of the present invention; FIG. 7 is an isometric view of a positioning arm of the present invention; FIG. 8 is an isometric view of a spindle of the present invention; FIG. 9 is an isometric view of a probe arm of the present invention; FIG. 10 is an isometric view of a housing of the present invention; FIG. 11 is an isometric view of a connecting rod of the present invention; FIG. 12 is a schematic illustration of the connection of the present invention to a tubular workpiece. In the drawing, a 1-seat body, a 2-sliding block, a 3-detecting arm, a 4-reference arm, a 5-locating hole, a 6-accommodating cavity, a 7-guide groove, an 8-main power source, a 9-connecting rod, a 10-rotating shaft, an 11-locating arm and a 12-tubular workpiece are arranged. Detailed Description The technical solution of the present invention is further described below with reference to