CN111060248A

CN111060248A - Nut pretightning force and moment of torsion test equipment

Info

Publication number: CN111060248A
Application number: CN201911367507.XA
Authority: CN
Inventors: 王峰; 邓曼; 张广平; 何永华; 罗紫薇; 李先军; 高小利
Original assignee: Zhuhai Zhonghang Aiwei Detection Technology Co ltd
Current assignee: Zhuhai Zhonghang Aiwei Detection Technology Co ltd
Priority date: 2019-12-26
Filing date: 2019-12-26
Publication date: 2020-04-24

Abstract

The invention discloses a nut pretightening force and torque testing device, wherein a torque sensor is arranged on a first side plate, an axial force sensor is arranged between the first side plate and a second side plate, the head of a high-rod bolt can be fixed on a clamping part of the torque sensor, a nut on the high-rod bolt is fixed on the second side plate, a round hole for a tested bolt to pass through is formed in the axial sensor, and the pretightening force and the torque applied to the nut can be measured by rotating the high-rod bolt through the torque sensor and the axial force sensor.

Description

Nut pretightning force and moment of torsion test equipment

Technical Field

The invention relates to the field of bolt and nut detection, in particular to nut pretightening force and torque testing equipment.

Background

The high-locking bolt is a bolt which improves the fatigue strength of a joint by utilizing the interference fit and the combined action of higher pretightening force caused by the interference magnitude of the bolt and the nut, and the nut used in cooperation with the high-locking bolt is also called as a high-locking nut. The pretension force and the torque of the high-locking bolt and the high-locking nut can be delivered from a factory only when meeting certain requirements, and some existing detection devices cannot measure the pretension force and the torque at the same time.

Disclosure of Invention

The present invention is directed to solving at least one of the problems of the prior art. Therefore, the invention provides a nut pretightening force and torque testing device which can simultaneously measure the pretightening force and the torque applied to the nut.

The invention discloses a nut pretightening force and torque testing device, which comprises: the machine body comprises a base, and a first side plate and a second side plate which are oppositely arranged on the base; the torque sensor is arranged on the first side plate, a driving device is arranged in the first side plate, and the driving device is used for driving the torque sensor to rotate; the clamping part is arranged on the torque sensor and is used for clamping one end of a workpiece; the connecting part comprises a first sliding rod, a second sliding rod and a fixing clamp, the first sliding rod and the second sliding rod are fixed between the first side plate and the second side plate, two ends of the fixing clamp are respectively fixed on the first sliding rod and the second sliding rod, and the fixing clamp is provided with a mounting hole; the axial force sensor is arranged in the mounting hole and is provided with a round hole for the tested workpiece to pass through; and the fixing part is arranged on the second side plate and is used for clamping the other end of the workpiece.

According to the embodiment of the invention, the nut pretightening force and torque testing equipment at least has the following beneficial effects: according to the invention, the torque sensor is arranged on the first side plate, the axial force sensor is arranged between the first side plate and the second side plate, the head of the high-rod bolt can be fixed on the clamping part of the torque sensor, the nut on the high-rod bolt is fixed on the second side plate, the bolt penetrates through the axial force sensor, and the pre-tightening force and the torque applied to the nut can be measured by rotating the high-rod bolt through the torque sensor and the axial force sensor.

According to some embodiments of the invention, the device further comprises a movable clamp, a fixed hole is arranged in the middle of the movable clamp, the fixed part penetrates through the movable clamp through the fixed hole, through holes are respectively arranged at two ends of the movable clamp, and the movable clamp is respectively sleeved on the first sliding rod and the second sliding rod through the through holes at the two ends.

According to some embodiments of the present invention, through holes are respectively formed at two ends of the fixing clamp, and the fixing clamp is respectively sleeved on the first sliding rod and the second sliding rod through the through holes at the two ends.

According to some embodiments of the present invention, the first sliding bar and the second sliding bar are respectively provided with a limiting block at both sides of the fixing clamp.

According to some embodiments of the invention, the fixing portion is provided with a nut sleeve, one end of the nut sleeve is mounted on the fixing portion, and the other end of the nut sleeve is provided with a hexagonal hole.

According to some embodiments of the invention, one end of the nut sleeve mounted on the fixing portion is provided with a square hole, the fixing portion is provided with a square rod, and the nut sleeve is mounted on the square rod through the square hole.

According to some embodiments of the invention, the clamping portion is a three-jaw cartridge, and the torque sensor is provided with a recess in which the three-jaw cartridge is disposed.

According to some embodiments of the invention, the drive means is an electric motor, an output shaft of the electric motor being connected to the torque sensor.

Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.

Drawings

The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

FIG. 1 is a schematic structural diagram of a test apparatus according to an embodiment of the present invention;

FIG. 2 is an enlarged view of portion A of FIG. 1;

fig. 3 is a schematic structural diagram of a torque sensor according to an embodiment of the present invention.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.

In the description of the present invention, the meaning of a plurality of means is one or more, the meaning of a plurality of means is two or more, and larger, smaller, larger, etc. are understood as excluding the number, and larger, smaller, inner, etc. are understood as including the number. If the first and second are described for the purpose of distinguishing technical features, they are not to be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.

In the description of the present invention, unless otherwise explicitly limited, terms such as arrangement, installation, connection and the like should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above terms in the present invention in combination with the specific contents of the technical solutions.

A nut pretension and torque testing apparatus comprising: the body 100 comprises a base 101, and a first side plate 102 and a second side plate 103 which are oppositely arranged on the base 101; the torque sensor 200 is arranged on the first side plate 102, and a driving device is arranged in the first side plate 102 and is used for driving the torque sensor 200 to rotate; a clamping part 300 provided on the torque sensor 200 for clamping one end of a workpiece; the connecting part 400 comprises a first slide bar 401, a second slide bar 402 and a fixing clamp 403, wherein two ends of the first slide bar 401 and the second slide bar 402 are respectively fixed on the first side plate 102 and the second side plate 103, so that the first slide bar 401 and the second slide bar 402 are both fixed between the first side plate 102 and the second side plate 103, two ends of the fixing clamp 403 are respectively fixed on the first slide bar 401 and the second slide bar 402, and the fixing clamp 403 is provided with a mounting hole; the axial force sensor 500 is arranged in the mounting hole and is provided with a round hole for a workpiece to be detected to pass through; and a fixing part 600 provided on the second side plate 103 for clamping the other end of the workpiece.

According to the invention, the torque sensor 200 is arranged on the first side plate 102, the axial force sensor 500 is arranged between the first side plate 102 and the second side plate 103, the head of a high-rod bolt can be fixed on the clamping part 300 of the torque sensor 200, a nut on the high-rod bolt is fixed on the second side plate 103, a round hole for a tested bolt to pass through is formed in the axial sensor, and the pre-tightening force and the torque applied to the nut can be measured by rotating the high-rod bolt through the torque sensor 200 and the axial force sensor 500.

Referring to fig. 1, in some embodiments, the clamp further includes a movable clamp 700, a fixing hole is disposed in a middle portion of the movable clamp 700, the fixing portion 600 penetrates through the fixing hole and is disposed in the movable clamp 700, through holes are respectively disposed at two ends of the movable clamp 700, respectively sleeved on the first slide bar 401 and the second slide bar 402 through the through holes at the two ends, and capable of sliding along an axial direction of the first slide bar 401 or the second slide bar 402. Through holes are respectively formed in two ends of the fixing clamp 403, and the first sliding rod 401 and the second sliding rod 402 are sleeved with the through holes in the two ends respectively. The first sliding rod 401 and the second sliding rod 402 are respectively provided with a limiting block at two sides of the fixing clamp 403. The stopper can restrict the slide of the fixing clamp 403, and the bolt does not slide left or right when rotating. Referring to fig. 2, a nut sleeve 601 is disposed on the fixing portion 600, one end of the nut sleeve 601 is mounted on the fixing portion 600, the other end of the nut sleeve 601 is provided with a hexagonal hole, the shape of the hexagonal hole is consistent with that of the nut, a square hole is disposed at one end of the fixing portion 600 where the nut sleeve 601 is mounted, a square rod 602 is disposed on the fixing portion 600, the size and the shape of the square rod 602 are consistent with those of the square hole, the nut sleeve 601 is mounted on the square rod 602 through the square hole, and the nut is fixed on the bolt through the hexagonal hole to prevent the nut from being removed when the nut rotates to apply a torque.

Referring to fig. 3, the clamping portion 300 is a three-jaw chuck, and a groove is formed on the torque sensor 200, and the three-jaw chuck is disposed in the groove. The three-jaw chuck can clamp the head of a test bolt, and the opening size of the three jaws is adjustable, so that the test bolts with different specifications can be conveniently clamped. During testing, the three-jaw chuck rotates at a set speed, and the torque borne by the nut during the testing process can be tested during the testing.

According to some embodiments of the present invention, the driving device is a motor, and an output shaft of the motor is connected to the torque sensor 200. During the test, the motor can drive the torque sensor 200 and the three-jaw chuck to rotate according to the set speed and the set angle, so that the torque borne by the nut in the test process can be tested during the test. Meanwhile, the axial sensor is provided with a small hole for the tested bolt to pass through, and the axial sensor detects the axial force, namely the pretightening force, applied to the bolt.

Claims

1. The utility model provides a nut pretightning force and moment of torsion test equipment which characterized in that includes:

the machine body (100) comprises a base (101), and a first side plate (102) and a second side plate (103) which are oppositely arranged on the base (101);

the torque sensor (200) is arranged on the first side plate (102), and a driving device is arranged in the first side plate (102) and is used for driving the torque sensor (200) to rotate;

a clamping portion (300) provided on the torque sensor (200) for clamping one end of a workpiece;

the connecting part (400) comprises a first sliding rod (401), a second sliding rod (402) and a fixing clamp (403), the first sliding rod (401) and the second sliding rod (402) are fixed between the first side plate (102) and the second side plate (103), two ends of the fixing clamp (403) are respectively fixed on the first sliding rod (401) and the second sliding rod (402), and a mounting hole is formed in the fixing clamp (403);

the axial force sensor (500) is arranged in the mounting hole and is provided with a round hole for the tested workpiece to pass through;

and a fixing portion (600) provided on the second side plate (103) for clamping the other end of the workpiece.

2. The nut pre-tightening force and torque testing device according to claim 1, wherein: still including activity anchor clamps (700), the middle part of activity anchor clamps (700) is equipped with the fixed orifices, fixed part (600) are passed through the fixed orifices is worn to locate activity anchor clamps (700), the both ends of activity anchor clamps (700) are equipped with the through-hole respectively, and the through-hole through both ends respectively overlaps and establishes on first slide bar (401) and second slide bar (402).

3. The nut pre-tightening force and torque testing device according to claim 1, wherein: through holes are respectively formed in two ends of the fixing clamp (403), and the first sliding rod (401) and the second sliding rod (402) are sleeved with the through holes in the two ends respectively.

4. The nut pre-tightening force and torque testing device according to claim 3, wherein: and the first sliding rod (401) and the second sliding rod (402) are respectively provided with a limiting block at two sides of the fixed clamp (403).

5. The nut pre-tightening force and torque testing device according to claim 1, wherein: the fixing part (600) is provided with a nut sleeve (601), one end of the nut sleeve (601) is installed on the fixing part (600), and the other end of the nut sleeve (601) is provided with a hexagonal hole.

6. The nut pre-tightening force and torque testing device according to claim 5, wherein: the nut sleeve (601) is arranged at one end of the fixing portion (600) and is provided with a square hole, the fixing portion (600) is provided with a square rod (602), and the nut sleeve (601) is arranged on the square rod (602) through the square hole.

7. The nut pre-tightening force and torque testing device according to claim 1, wherein: the clamping part (300) is a three-jaw chuck, a groove is formed in the torque sensor (200), and the three-jaw chuck is arranged in the groove.

8. The nut pre-tightening force and torque testing device according to claim 1, wherein: the driving device is a motor, and an output shaft of the motor is connected with the torque sensor (200).