CN212779067U

CN212779067U - Symmetry detection device

Info

Publication number: CN212779067U
Application number: CN202021210823.4U
Authority: CN
Inventors: 崔明月; 邹冰山; 张泉水
Original assignee: Ningbo Powermetal Industrial Co ltd
Current assignee: Ningbo Powermetal Industrial Co ltd
Priority date: 2020-06-28
Filing date: 2020-06-28
Publication date: 2021-03-23
Anticipated expiration: 2030-06-28

Abstract

The utility model discloses a symmetry degree detection device, which comprises a base, wherein one end of the base is provided with a positioning block for placing a workpiece, and the other end of the base is provided with a detection component for detecting the symmetry degree of the workpiece; a support frame is arranged on the base close to the positioning block, and a pressing mechanism is rotatably arranged on the support frame; the detection assembly comprises a caliper gauge and a caliper gauge support, a through hole is formed in the upper end of the caliper gauge support, and the upper end of the caliper gauge is vertically and slidably inserted into the through hole; the lower extreme of calliper rule is equipped with and waits to examine the position assorted detection draw-in groove with the work piece. The utility model discloses a symmetry detection device, simple structure, convenient operation, detection efficiency is high, and occupation space is little, and the transport is convenient.

Description

Symmetry detection device

Technical Field

The utility model belongs to the technical field of geometric tolerances detection device technique and specifically relates to a symmetry detection device.

Background

Symmetry (Symmetry) refers to the axis of the machined dimension, which must lie within the tolerance required for Symmetry and is a positional tolerance between two parallel planes symmetrical with respect to a secondary plane passing through the reference axis. As shown in fig. 1 and 2, a shaft-like workpiece 100 is provided, and a U-shaped groove 101 is provided at one end of the workpiece 100, the U-shaped groove 101 is used for matching with a corresponding part, and the workpiece 100 has strict requirements on the symmetry of a neck 102, so that the requirements must be ensured in the machining process.

The new problem brought about by the method is how to detect the symmetry of the finished product processed at the position of the neck 102, the current common detection mode is to manually use three coordinates for detection, the repeated clamping of the product has errors, and the detection of one product requires about ten minutes, so that the detection efficiency is low; other such products have some inherent magnetism which will affect the detection accuracy of the three-coordinate probe; in addition, the detected size is the special characteristic size of the whole factory, and when the quality problem occurs, the three-coordinate equipment cannot be used for on-site full detection.

SUMMERY OF THE UTILITY MODEL

The utility model discloses the technical problem that will solve is: the symmetry degree detection device overcomes the defects of the prior art, and is simple in structure, convenient to operate, high in detection efficiency, small in occupied space and convenient to carry.

The utility model adopts the technical proposal that: the symmetry degree detection device comprises a base, wherein one end of the base is provided with a positioning block for placing a workpiece, and the other end of the base is provided with a detection assembly for detecting the symmetry degree of the workpiece; a support frame is arranged on the base close to the positioning block, and a pressing mechanism is rotatably arranged on the support frame; the detection assembly comprises a caliper gauge and a caliper gauge support, a through hole is formed in the upper end of the caliper gauge support, and the upper end of the caliper gauge is vertically and slidably inserted into the through hole; the lower extreme of calliper rule is equipped with and waits to examine the position assorted detection draw-in groove with the work piece.

Compared with the prior art, the technical scheme of the utility model have following advantage:

the utility model discloses a detection device is a professional frock that is applied to the symmetry detection of the U type groove position of axle type work piece that has U type groove, adopt the axle external diameter as the benchmark in the testing process, through hold-down mechanism pressfitting on the work piece lateral wall, make work piece and examine a fixed surface laminating self-centering, avoid other through type examine a utensil need get rid of the external diameter tolerance and contain including the design tolerance, reduce the qualified erroneous judgement of product, utilize the calliper rule to clamp and carry out the symmetry detection at corresponding detection position, set up corresponding detection draw-in groove on the calliper rule, the size of detection draw-in groove is the size in the allowable tolerance range of detection size, directly carry out the block through detection draw-in groove and detection position and can judge whether qualified; convenient operation and high detection efficiency.

As an improvement, the upper end of the caliper gauge penetrates out of the end part of the through hole to be provided with a handle, and an elastic piece is arranged between the lower end face of the handle and the upper end face of the caliper gauge support. In this structure, be equipped with corresponding elastic component between the upper end of calliper and calliper support, when detecting, the manual calliper of pressing, the calliper moves down and waits to examine the position block with the work piece and detect, and external force removes the back, and under the reverse restoring force effect of elastic component, the calliper is automatic upward for next block detects, need not the up-draw of the calliper of thinking, saves physical power.

Preferably, the pressing mechanism comprises a connecting plate, one end of the connecting plate is hinged with the supporting frame, the other end of the connecting plate is provided with a roller, and the roller is positioned above the positioning block; and the driving piece is arranged on the supporting frame and used for driving one end of the connecting plate close to the roller to have a trend of moving towards the workpiece all the time. After the station is positioned on the positioning block, the workpiece is further pressed and fixed on the outer surface of the workpiece through the roller pressing, and detection is facilitated.

As an improvement, a mounting hole is formed in one end, far away from the support frame, of the connecting plate, a pin shaft is slidably arranged in the mounting hole along the length direction of the workpiece, and the roller is arranged at one end of the pin shaft; and the connecting plate is provided with a fastener for limiting the pin shaft. The position of the pin shaft is moved in the structure to adjust the position of the roller, so that the pressing position of the outer surface of the workpiece is adjusted, the structure can be suitable for workpieces with different gravity center positions, and the stability of the roller after pressing is guaranteed.

As a structure, the driving piece is a tension spring, one end of the tension spring is connected to the base, and the other end of the tension spring is connected to one end, close to the roller, of the connecting plate.

As another structure, the driving piece is a torsion spring which is arranged at the hinged position of the connecting plate and the supporting frame. Directly adopt the torsional spring as the driving piece in this structure, and the effort of this torsional spring is used for making the connecting plate be located the one end of gyro wheel and has down motion's effort all the time, before the product is placed on the locating piece like this, it up lifts the one end distance with the one end of the nearly gyro wheel of connecting plate earlier to receive to move, the work piece is placed and is accomplished the back, remove external force, under the torsional spring effort, the gyro wheel down motion, the pressfitting is at the surface of work piece, further improve the stability of location, the work piece can not slide in the testing process, the degree of accuracy that the improvement symmetry detected.

And the improved structure is characterized in that the positioning block is provided with a V-shaped groove, and one end of the V-shaped groove, which is far away from the detection assembly, is provided with a positioning plate.

And in a further improvement, the included angle a of the V-shaped groove is 90 degrees. The 90-degree angle positioning groove enables cylindrical shaft workpieces to be positioned more stably, is wide in application range and can be suitable for workpieces with different shaft diameters.

In a further improvement, buffering support legs are arranged at four angular positions of the lower end of the base. The arrangement of the buffering support leg structure enables the workpiece to have buffering force in the vertical direction in the detection process, the damping effect is achieved, and the detection precision is improved.

Drawings

Fig. 1 is a structural view of a workpiece to be inspected.

Fig. 2 is an X-direction view in fig. 1.

Fig. 3 is a schematic structural view of the symmetry detecting apparatus of the present invention.

Fig. 4 is a front view of a symmetry detecting apparatus according to the present invention.

Fig. 5 is a sectional view taken along line a-a in fig. 4.

Fig. 6 is a sectional view taken along line B-B in fig. 4.

Description of reference numerals:

100-workpiece, 101-U-shaped groove, 102-neck;

1-base, 2-locating block, 2.1-V-shaped groove, 3-support frame, 4-caliper, 4.1-detection clamping groove, 5-caliper support, 6-handle, 7-elastic piece, 8-connecting plate, 9-roller, 10-pin shaft, 11-fastening piece, 12-locating plate, 13-buffer supporting leg, 14-handle and 15-operating rod.

Detailed Description

The present invention will be further described with reference to the accompanying drawings and the following detailed description.

In the description of the present invention, it should be noted that the terms "above", "upper end", "lower end", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present invention.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the term "connected" is to be interpreted broadly, for example, as a fixed connection, a detachable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

As shown in fig. 3, the utility model provides a symmetry detection device, including base 1, this base 1 is a plate structure, for the convenience of transport, installs handle 14 in the both sides of base 1.

A positioning block 2 for placing a workpiece 100 is arranged at one end of the base 1, and a detection assembly for detecting the symmetry degree of a specific position on the workpiece 100 is arranged at the other end of the base 1; the position of nearly locating piece 2 is equipped with support frame 3 on the base 1, rotates on the support frame 3 and is equipped with hold-down mechanism, and hold-down mechanism is located the top of locating piece 2, places back on locating piece 2 when work piece 100, compresses tightly spacingly to it at the up end of work piece 100 through the hold-down mechanism pressfitting, convenient detection.

Specifically, as shown in fig. 1 and 2, a part of material is cut at one end of a workpiece 100 to form a U-shaped groove 101, and the position of a reserved neck 102 at the inner side of the U-shaped groove 101 is a specific part to be detected; when the workpiece 100 is placed on the positioning block 2, the pressing mechanism is rotated to be pressed and positioned on the upper surface of the workpiece 100, and after the workpiece is stably positioned, the detection assembly is manually operated to detect the symmetry degree of the neck 102 on the workpiece 100.

In this embodiment, preferably, a V-shaped groove 2.1 is disposed on the positioning block 2, and a positioning plate 12 is disposed at an end of the V-shaped groove 2.1 away from the detection assembly, as shown in fig. 3 and 6; when the workpiece 100 is placed in the V-shaped groove 2.1, the positioning plate 12 is used for abutting and limiting the axial direction of the workpiece 100; more specifically, the included angle of this V type groove is 90 for cylindrical axle class work piece 100 fixes a position more stably, and the range of application is wide, can be applicable to the work piece of multiple different shaft diameters.

Specifically, as shown in fig. 5, in this embodiment, the detection assembly includes a caliper 4 and a caliper support 5, a through hole is formed in the upper end of the caliper support 5, and the upper end of the caliper 4 is inserted into the through hole in a vertically slidable manner; the lower end of the caliper 4 is provided with a detection clamping groove 4.1 matched with the neck 102 to be detected of the workpiece 100, the size of the detection clamping groove 4.1 corresponds to the size of the neck 102 to be detected, as shown in fig. 1 and 5, the size D1 of the neck 102 of the workpiece 100, the size D2 of the detection clamping groove 4.1 of the caliper 4 and the size D2 are the size D1 plus the tolerance range, specifically, after the workpiece 100 is positioned, the caliper 4 is pressed down, and when the detection clamping groove 4.1 at the lower end of the caliper 4 can be smoothly clamped into the neck 102 of the workpiece 100, the symmetry of the product is qualified; if the detection clamping groove 4.1 cannot be clamped into the neck 102 on the workpiece 100, the processing symmetry of the workpiece 100 is not qualified. On the other hand, in order to facilitate the snap gauge 4 to be smoothly snapped into the neck 102, a transition R-angle 4.2 is provided at the outer end of the opening of the detection slot 4.1.

On the other hand, in order to realize that the snap gauge 5 can be quickly and automatically rebound and reset after descending detection, the snap gauge is not required to be manually pulled out upwards, a handle 6 is arranged at the end part of the upper end of the snap gauge 4 penetrating out of the through hole in the structure, and an elastic part 7 is arranged between the lower end face of the handle 6 and the upper end face of the snap gauge support 5. Specifically, the elastic member 7 is a spring, but in other embodiments, the elastic member may also be a rubber support piece, and the rubber support piece has an arc-shaped structure with a middle portion protruding upward.

On the other hand, the pressing mechanism in the device comprises a connecting plate 8, one end of the connecting plate 8 is hinged with the support frame 3, the other end of the connecting plate 8 is provided with a roller 9, and the roller 9 is positioned above the positioning block 2; the supporting frame 3 is provided with a driving part for driving one end of the connecting plate 8 close to the roller 9 to have a trend of moving towards the workpiece 100 all the time, so that the roller 9 is always attached to the upper end face of the workpiece 100, and the positioning stability of the workpiece 100 is ensured.

In order to enable the roller 9 to limit the workpieces 100 with different gravity centers, namely, to enable the roller 9 to move in the axial direction, in the structure, a mounting hole is formed in one end, away from the support frame 3, of the connecting plate 8, a pin shaft 10 is slidably arranged in the mounting hole along the length direction of the workpieces 100, and the roller 9 is arranged at one end of the pin shaft 10; the connecting plate 8 is provided with a fastener 11 for defining a pin 10, as shown in fig. 4. Specifically, the fastener 11 is a screw, the screw is connected to the connecting plate 8, and the head of the screw is fastened to the outer surface of the pin 10 along a direction perpendicular to the mounting hole.

As an embodiment, the driving member is a tension spring, one end of the tension spring is connected to the base 1, and the other end of the tension spring is connected to one end of the connecting plate 8 near the roller 9. Keep away from the one end extension of gyro wheel 8 at connecting plate 9 and be equipped with action bars 15, before work piece 100 was placed on locating piece 2, down press operation bars 15 for the extension spring is in tensile state, and gyro wheel 9 up moves, places when work piece 100 and accomplishes the back, and the external force of effect on action bars 15 is relieved, and under extension spring pulling force effect, the one end of gyro wheel 9 moves down towards work piece 100 position, until the pressfitting on the surface of work piece 100, realizes spacing the stability of work piece 100, convenient detection.

Similarly, in another embodiment, the driving member is a torsion spring, and the torsion spring is provided at the hinge joint of the connecting plate 8 and the supporting frame 3. The effort of this torsional spring is used for making the connecting plate 8 lie in the effort that the one end of gyro wheel 9 had down motion all the time, and before work piece 100 was placed on locating piece 2, the manual one end that lifts up one end distance with the nearly gyro wheel 9 of connecting plate 8 earlier, and work piece 100 placed the completion back, removed external force, and under the torsional spring effort, gyro wheel 9 moved down, and the pressfitting compresses tightly spacingly at the surface of work piece 100.

On the other hand, as shown in fig. 5, the buffering legs 13 are disposed at four corners of the lower end of the base 1, so as to ensure that the workpiece 100 has a better damping effect during positioning and detection, and improve the detection accuracy.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those skilled in the art that various changes in the embodiments and modifications thereof may be made, and equivalents may be substituted for elements thereof; such modifications and substitutions do not depart from the spirit and scope of the present invention in its corresponding aspects.

Claims

1. A symmetry detection device is characterized in that: the device comprises a base (1), wherein one end of the base (1) is provided with a positioning block (2) for placing a workpiece (100), and the other end of the base (1) is provided with a detection component for detecting the symmetry degree of the workpiece (100); a support frame (3) is arranged on the base (1) near the positioning block (2), and a pressing mechanism is rotatably arranged on the support frame (3); the detection assembly comprises a caliper gauge (4) and a caliper gauge support (5), a through hole is formed in the upper end of the caliper gauge support (5), and the upper end of the caliper gauge (4) is inserted into the through hole in a vertically slidable manner; the lower extreme of caliber (4) is equipped with and waits to examine the position assorted detection draw-in groove (4.1) with work piece (100).

2. The symmetry detection apparatus according to claim 1, characterized in that: the upper end of the caliper gauge (4) penetrates out of the end part of the through hole to be provided with a handle (6), and an elastic part (7) is arranged between the lower end face of the handle (6) and the upper end face of the caliper gauge support (5).

3. The symmetry detection apparatus according to claim 1, characterized in that: the pressing mechanism comprises a connecting plate (8), one end of the connecting plate (8) is hinged with the support frame (3), the other end of the connecting plate (8) is provided with a roller (9), and the roller (9) is positioned above the positioning block (2); and a driving piece is arranged on the supporting frame (3) and used for driving one end of the connecting plate (8) close to the roller (9) to have a trend of moving towards the workpiece (100) all the time.

4. The symmetry detection apparatus according to claim 3, characterized in that: a mounting hole is formed in one end, far away from the support frame (3), of the connecting plate (8), a pin shaft (10) is slidably arranged in the mounting hole along the length direction of the workpiece (100), and the roller (9) is arranged at one end of the pin shaft (10); and a fastener (11) for limiting the pin shaft (10) is arranged on the connecting plate (8).

5. The symmetry detection apparatus according to claim 3, characterized in that: the driving piece be the extension spring, the one end of extension spring is connected on base (1), the one end that the other end is connected near gyro wheel (9) in connecting plate (8).

6. The symmetry detection apparatus according to claim 3, characterized in that: the driving piece is a torsion spring which is arranged at the hinged position of the connecting plate (8) and the supporting frame (3).

7. The symmetry detection apparatus according to claim 1, characterized in that: locating piece (2) on be equipped with V type groove (2.1), the one end that detection component was kept away from in V type groove (2.1) is equipped with locating plate (12).

8. The symmetry detection apparatus according to claim 7, characterized in that: the included angle a of the V-shaped groove (2.1) is 90 degrees.

9. The symmetry degree detection apparatus according to any one of claims 1 to 8, characterized in that: four angular positions of the lower end of the base (1) are provided with buffering support legs (13).