TW201741643A - Stretching mechanism with double slide blocks comprising a sliding seat, four sliding units slidably arranged on the sliding seat and two stretching parts slidably arranged on the sliding seat - Google Patents

Abstract

This invention discloses a stretching mechanism with double slide blocks. The stretching mechanism with double slide blocks comprises a sliding seat, four sliding units slidably arranged on the sliding seat and two stretching parts slidably arranged on the sliding seat. When one of the stretching parts is driven by a single power source to outwards slide to be far away from the other stretching part, one of the stretching parts can drive the corresponding sliding units to outwards move to ensure that four fixed parts of a test piece are biaxially stretched, so that the test piece can be subjected to biaxial stretching test. The stretching mechanism with double slide blocks can be applied to a machine table with a single power source and is of highly extensive application and capable of effectively reducing the cost.

Description

Double slide stretching mechanism

The present invention relates to a double slide stretching mechanism, and more particularly to a double slide stretching mechanism which can be used for biaxial tensile testing of a test piece.

Generally, thin metal forming is mostly a biaxial force behavior. Therefore, if the mechanical properties of the thin metal are to be measured, the biaxial tensile test is often used to perform the biaxial stretching of the thin metal in the plane direction in order to further obtain Data such as the exit and fall criteria. The common biaxial testing machine mostly uses biaxial stretching of the test piece through a power source such as a plurality of hydraulic cylinders. However, such a machine with multiple power sources is not only expensive but also incompatible. The single-axis test machine for single-power source has low versatility.

Accordingly, it is an object of the present invention to provide a dual-slider stretching mechanism that provides a single power source and can perform a biaxial tensile test on the test piece.

Therefore, the double-slider stretching mechanism of the present invention performs a biaxial tensile test on a test piece, the test piece including a central portion, four extending portions extending outward from the central portion, and four respectively disposed on a fixed portion on the extensions.

The double-slider stretching mechanism comprises a sliding seat, four sliding units disposed on the sliding seat, and two tensile members disposed on the sliding seat. The sliding seat comprises a base portion, four base wall portions symmetrically arranged at intervals on the base portion, four sliding grooves respectively defined by the spacing of any two adjacent base wall portions, and two respectively formed a guide groove on any two non-adjacent base walls. The sliding units are slidably disposed in the sliding grooves, and each sliding unit is fixed to one of the fixing portions corresponding to the test piece.

The tensile members are slidably disposed in the guide channels, and each of the tensile members is a two adjacent sliding unit that is pushed into the top. When any of the stretching members slides outward along the guiding grooves away from the other stretching members, the corresponding sliding units are respectively moved outward along the sliding grooves, so that the fixing portions of the test piece are pulled. The test piece was subjected to a biaxial tensile test.

The utility model has the advantages that the stretching members are driven by a single power source, and therefore can be applied to a general single power source machine, which has high versatility and low cost, and is in the process of pulling one of the stretching members. The two sliding units corresponding to each other are moved in the biaxial direction, so that the fixing portions of the test piece are stretched, and the biaxial tensile test of the test piece is performed.

Referring to FIG. 1 , an embodiment of the dual-slider stretching mechanism 1 of the present invention comprises a sliding seat 2 and four sliding units 3 disposed on the sliding seat 2 at equal angles, and two sliding surfaces are arranged in parallel with each other. The tensile member 4 on the seat 2.

Referring to FIG. 1 and FIG. 2, the sliding seat 2 includes a base portion 21, four base wall portions 22 symmetrically disposed at intervals on the base portion 21, and four adjacent base wall portions 22 respectively. The chutes 23 defined by the intervals, and the guide grooves 24 formed on the two non-adjacent base wall portions 22, respectively, are formed. In the present embodiment, each of the two adjacent chutes 23 is perpendicular to each other, and the guide grooves 24 are located on the same straight line.

Referring to FIG. 1 , FIG. 2 , and FIG. 3 , the sliding units 3 are slidably disposed in the sliding slots 23 , and each sliding unit 3 includes a sliding block 31 and a fixing through the sliding block 31 . a member 32, two pivotally penetrating the slider 31 and in rolling contact with the corresponding tensile member 4, four protrusions respectively protruding on the slider 31 and respectively opposite to the slider 2 Balls 34 corresponding to the rolling contact of the base wall portion 22, and four rollers 35 respectively pivoted on opposite sides of the slider 31 and located above the balls 34 and in rolling contact with the corresponding base wall portions 22, respectively . The slider 31 has a block portion 311 which is pushed against the corresponding tensile member 4, and a notch 312 which is laterally opened on the block portion 311. The balls 34 and the rollers 35 are respectively disposed on opposite sides of the block portion 311, and the balls 34 are located below the notch 312, and the rollers 35 are respectively located in the slot Above and below 312, this configuration is to effectively reduce friction, but not limited to this.

Referring to FIG. 1 , FIG. 2 , and FIG. 4 , the tensile members 4 are slidably disposed in the guide grooves 24 , and each of the tensile members 4 includes a linkage portion 41 and a linkage portion 41 . The urging portion 42 extending outward along the corresponding guiding groove 24 and a through groove 43 extending laterally on the linking portion 41. The linking portion 41 has two inclined surfaces 411 respectively pushing against the corresponding block portions 311. Each inclined surface 411 is pushed against a corresponding block portion 311, and the rotating rod 33 is disposed on the block portion 311. Rolling contact.

Referring to FIG. 1, FIG. 2, and FIG. 5, the present embodiment is used for performing a biaxial tensile test on a test piece 5, the test piece 5 including a central portion 51, and four extending outward from the central portion 51. The extending portion 52 and the four fixing portions 53 respectively disposed on the extending portions 52. First, the test piece 5 is first passed through the notch 312 of the slider 31 and the through groove 43 of the tensile member 4 (see FIG. 4), and fixed by the fixing members 32 of the sliding units 3, respectively. The portion 53 is fixed to the sliders 31. Each of the extending portions 52 and the corresponding fixing portions 53 of the test strip 5 are extended in the notch 312 of the corresponding slider 31. The central portion 51 of the test strip 5 And the portion of the extension portion 52 adjacent to the central portion 51 is received in the through groove 43 of the tensile member 4.

Referring to FIG. 1, FIG. 5, and FIG. 6, when performing the biaxial test, a linear power device (not shown) such as a hydraulic cylinder is applied to the urging portion 42 of any of the tensile members 4 to make the pull. The extension 4 slides along the guide slots 24 away from the other tensile member 4. During the moving process, the tensioning member 4 is pushed through the inclined surfaces 411 to the corresponding two sliders 31, so that the sliders 31 are respectively moved outward along the sliding slots 23, by the aforementioned linkage manner. The distance between the two sliders 31 on the same straight line is gradually increased, and the four fixing portions 53 of the test piece 5 can be biaxially stretched. It should be particularly noted that in this embodiment, the two stoppers 6 can also be disposed in the vicinity of the two sliders 31 that slide outward to further guide the movement of the sliders 31.

In this embodiment, only one single power source is used to pull one of the tensile members 4, and the interlocking of the sliders 31 can achieve the biaxial stretching effect on the four fixing portions 53 of the test piece 5, which is effective. It reduces the cost of equipment and can match the single power source of the machine, and has high versatility. The balls 34 and the rollers 35 of the sliding unit 3 are in rolling contact with the base wall portions 22 of the sliding seat 2, and the sliding between the sliders 31 and the sliding seat 2 can be reduced. Friction, and the rotating rod 33 of each sliding unit 3 is in rolling contact with one of the inclined faces 411 of the corresponding stretching member 4 to reduce the wear amount between the sliding block 31 and the tensile member 4, thereby improving product durability degree.

In summary, the present embodiment only needs to use a single power source to perform a biaxial tensile test, thereby being compatible with a single power source machine, and having a simple structure and reducing equipment costs, in addition to the balls 34 and rollers. 35, and the setting of the rotating rod 33 can effectively reduce the wear and increase the service life, so the object of the present invention can be achieved.

However, the above is only the embodiment of the present invention, and the scope of the invention is not limited thereto, and all the equivalent equivalent changes and modifications according to the scope of the patent application and the patent specification of the present invention are still The scope of the invention is covered.

1‧‧‧Double slider stretching mechanism
2‧‧‧Slide
21‧‧‧Base section
22‧‧‧ siding
23‧‧‧Chute
24‧‧‧Guide
3‧‧‧Sliding unit
31‧‧‧ Slider
311‧‧‧Block body
312‧‧‧ Missing slot
32‧‧‧Fixed parts
33‧‧‧Rot
34‧‧‧ balls
35‧‧‧roller
4‧‧‧Drawing parts
41‧‧‧ linkage department
411‧‧‧Slope
42‧‧‧ Force Department
43‧‧‧through slot
5‧‧‧ test strips
51‧‧‧ Central Department
52‧‧‧Extension
53‧‧‧ fixed department
6‧‧ ‧block

BRIEF DESCRIPTION OF THE DRAWINGS Other features and advantages of the present invention will be apparent from the embodiments of the present invention, wherein: Figure 1 is a plan view showing an embodiment of the double-slider stretching mechanism of the present invention; A sliding seat and four sliding units of the embodiment are illustrated; FIG. 3 is a perspective view showing one of the sliding units of the embodiment; FIG. 4 is a perspective view showing one of the stretching members of the embodiment; A top view illustrates a test piece suitable for use in the present embodiment; and FIG. 6 is a schematic view showing the test case of the present embodiment, and only some of the elements are shown in FIG.

1‧‧‧Double slider stretching mechanism

2‧‧‧Slide

22‧‧‧ siding

23‧‧‧Chute

24‧‧‧Guide

3‧‧‧Sliding unit

31‧‧‧ Slider

311‧‧‧Block body

32‧‧‧Fixed parts

33‧‧‧Rot

35‧‧‧roller

4‧‧‧Drawing parts

41‧‧‧ linkage department

411‧‧‧Bevel

42‧‧‧ Force Department

5‧‧‧ test strips

51‧‧‧ Central Department

52‧‧‧Extension

53‧‧‧ fixed department

Claims (6)

A double-slider stretching mechanism for performing a biaxial tensile test on a test piece, the test piece comprising a central portion, four extending portions extending outward from the central portion, and four respectively disposed at the same a fixing portion on the extension portion, the double-slider stretching mechanism comprises: a sliding seat, comprising a base portion, four base wall portions symmetrically and spaced apart from each other on the base portion, and four different phases a sliding groove defined by the adjacent wall portions, and two guiding grooves respectively formed on any two non-adjacent base wall portions; four sliding units are slidably disposed in the sliding grooves, respectively Each sliding unit is fixed to one of the fixing portions corresponding to the test piece; and two stretching members are slidably disposed in the guiding grooves, and each of the stretching members is pushed to push two adjacent ones thereof The sliding unit, when any of the stretching members slides outward along the guiding grooves and away from the other stretching member, drives the corresponding sliding units to move outward along the sliding grooves respectively, so that the test piece has the same The fixing portion is stretched. The double-slider stretching mechanism of claim 1, wherein each sliding unit comprises a slider, and at least one fixing member that passes through the slider and the corresponding fixing portion of the test strip, the slider has a block portion that is pushed against the corresponding tensile member, and a notch that is laterally opened on the block portion for the corresponding extension portion and the fixing portion of the test piece to extend. The double-slider stretching mechanism of claim 2, wherein each of the stretching members includes a linking portion, a biasing portion extending outward from the corresponding guiding portion by the linking portion, and a laterally opening portion a through slot for the central portion of the test piece and a corresponding extension portion passing through the linking portion, the linking portion having two inclined faces respectively pushing against the corresponding sliding unit, and when the linking portion moves outward, the inclined surface is Sliding relative to the corresponding two sliding units, respectively, and pushing the sliding units outward. The double-slider stretching mechanism of claim 3, wherein each of the sliding units further comprises at least one rotating rod pivotally piercing the slider and in rolling contact with the inclined surface of the corresponding tensile member. The double-slider stretching mechanism of claim 4, wherein each sliding unit further comprises a plurality of oppositely protruding sides on opposite sides of the block portion and in rolling contact with the corresponding base wall portions of the sliding block. Balls. The double-slider stretching mechanism of claim 5, wherein each sliding unit further comprises a plurality of oppositely pivoted on opposite sides of the block body, and rolling contact with the corresponding base wall portions of the sliding seat Roller.