CN214041003U - Pedestal for detecting hardness of prestressed clamping piece - Google Patents
Pedestal for detecting hardness of prestressed clamping piece Download PDFInfo
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- CN214041003U CN214041003U CN202022236587.XU CN202022236587U CN214041003U CN 214041003 U CN214041003 U CN 214041003U CN 202022236587 U CN202022236587 U CN 202022236587U CN 214041003 U CN214041003 U CN 214041003U
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Abstract
The utility model relates to a pedestal for detecting prestressing force clamping piece hardness, including the cassette, the bottom surface level of cassette sets up, the top surface of cassette supports and the spacing face of side including the circular arc, the circular arc supports and is located in the middle of the cassette top surface, the spacing face of side is located the circular arc and supports both sides, and the circular arc supports and forms the draw-in groove after the side of both sides is spacing between the face through the wire cut processing, the draw-in groove forms alpha oblique angle with the horizontal plane, and alpha oblique angle is unanimous with the alpha oblique angle of the clamping piece external conical surface, makes the clamping piece put into the draw-in groove after, the clamping piece external conical surface is in the horizontality. The utility model provides a pedestal can carry on spacingly to the clamping piece, avoids among the testing process clamping piece to produce and slide to inject the hardness scope of cassette, made the detection data accurate reliable.
Description
Technical Field
The utility model relates to a prestressing force clamping piece detects frock especially relates to a pedestal for detecting prestressing force clamping piece hardness.
Background
The anchorage device is a permanent anchorage device used in prestressed concrete, and is an anchorage tool, also called a prestressed anchorage device, used in a post-tensioning structure or component for maintaining the tensile force of a prestressed tendon and transmitting the tensile force to the interior of the concrete. At present, a clamp for clamping a steel strand in an anchor hole of an anchor generally comprises two or three anchor clamping pieces which are enclosed together to form a circular truncated cone shape, the cross section of the clamp is in an inverted circular truncated cone shape in a vertical state, and corresponding technical requirements are met for the hardness of the anchor clamping pieces.
The clamping piece is used as a key anchoring element of the prestress anchoring system and plays a critical role in anchoring performance. The clamping piece is usually made of 20CrMnTi material after heat treatment, the outer surface of the clamping piece is an oblique conical surface with a certain angle, the surface hardness is generally not less than 78HRA, and the structural form is divided into a two-petal type and a three-petal type. The hardness measurement of the anchorage clamping piece is generally carried out by using a Rockwell hardness tester, the Rockwell hardness tester comprises a test bench for placing a to-be-tested object and a pressure head positioned above the test bench, and after a main test force is applied to the to-be-tested object through the pressure head, the main test force is removed, and the indentation residual depth is measured under an initial test force to obtain a hardness value.
Chinese patent application No. 201520332935.X discloses a tool component for detecting the hardness of an anchorage device clamping piece specially, which adopts a structure of a cushion block and a supporting rod, wherein the bottom surface of the cushion block is level and flat, the top surface is in an inclined plane shape, and the supporting rod is welded on the top surface of the cushion plate. This structure has some drawbacks: 1) the fixture does not limit the clamping piece, and the clamping piece is easy to slide in the hardness detection process; 2) the hardness value of the support rod is too wide, and the hardness value of the clamping piece is extremely easy to be measured inaccurately when the support rod is used.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the technical problem that a pedestal and an application method for detecting prestressing force clamping piece hardness are provided to above-mentioned prior art, solve because of the clamping piece appears sliding and bracing piece hardness number too wide in the testing process and cause the inaccurate problem of hardness testing data.
The utility model provides a technical scheme that above-mentioned problem adopted does: the utility model provides a pedestal for detecting prestressing force clamping piece hardness, includes the cassette, the bottom surface level of cassette sets up, the top surface of cassette supports and the spacing face of side including the circular arc, the circular arc supports and is located in the middle of the cassette top surface, the spacing face of side is located circular arc support both sides, and the circular arc supports and forms the draw-in groove after the spacing face of side of both sides is processed through the wire-electrode cutting, the draw-in groove forms alpha oblique angle with the horizontal plane, and alpha oblique angle is unanimous with the alpha oblique angle of the clamping piece ectoconical surface, makes the clamping piece put into the draw-in groove after, the clamping piece ectoconical surface is in the horizontality the draw-in groove lower inclination terminal surface of cassette is provided with the baffle for the restriction clamping piece slides downwards.
Preferably, the arc support has a surface radian consistent with the radian of the arc surface of the clamping piece.
Preferably, the included angle beta between the limiting surfaces at the two sides is consistent with the included angle beta between the cutting surfaces of the clamping pieces.
Preferably, the angle β is 120 ° or 180 °.
Preferably, the vertex of the inner arc of the clamping piece is a, the intersection point of the inner arc of the clamping piece and the cutting plane of the clamping piece is B, the vertical height between the intersection point a and the intersection point B is h1, the vertex of the top surface of the arc support is C, the intersection point of the arc support and the two side limiting surfaces is D, the vertical height between the intersection point C and the intersection point D is h2, and h2 is h1+ (0.5-1.5) mm.
Preferably, the baffle is fixed with the clamping seat through a screw or welding mode.
Preferably, the hardness range of the clamping seat is 60-70 HRC.
Preferably, the clamping seat and the baffle are made of metal materials, and the clamping seat is square or rectangular in shape.
Compared with the prior art, the utility model has the advantages of:
the utility model provides a pedestal for detecting prestressing force clamping piece hardness, its upper surface is middle circular arc support, the spacing face structure of both sides side, form the draw-in groove after the wire cutting processing between the spacing face of side of circular arc support and both sides, the surface radian that the circular arc supported is unanimous with the clamping piece radian, ensure that the clamping piece is arranged in on the pedestal and is supported closely laminating with the circular arc, and the draw-in groove forms alpha oblique angle with the horizontal plane, it is unanimous with the alpha oblique angle of the clamping piece external conical surface, make the clamping piece put into the draw-in groove after, the clamping piece external conical surface is in the horizontality, make the gauge head beat down keep perpendicular with the clamping piece surface, can not skid, guarantee the accuracy and reliability of detected data; meanwhile, a baffle is fixed on the end surface of the lower dip angle side of the clamping groove of the pedestal, so that the clamping piece cannot slide when the hardness is detected; on the other hand the utility model provides a cassette hardness scope is confirmed, has further improved the accuracy of detection data.
Drawings
Fig. 1 is a schematic structural diagram of a pedestal in an embodiment of the present invention.
Fig. 2 is a schematic structural diagram of the card seat in the embodiment of the present invention.
Fig. 3 is a schematic structural view of the lower dip angle side of the clamping seat in the embodiment of the present invention.
Fig. 4 is a top view of the card seat in the embodiment of the present invention.
Fig. 5 is a schematic structural diagram of a slot on a card seat in an embodiment of the present invention.
Fig. 6 is a schematic structural view of an outer conical surface of a card in an embodiment of the present invention.
Fig. 7 is a schematic structural diagram of a two-petal and three-petal card according to an embodiment of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the following embodiments.
As shown in fig. 1 to 6, the present embodiment provides a pedestal for detecting the hardness of a prestressed clamping piece, which includes a clamping seat 1 and a baffle 2, where the baffle 2 is fixed at one end of the clamping seat 1. The bottom surface of the clamping seat 1 is horizontally arranged, the top surface of the clamping seat comprises an arc support 111 and a side limit surface 112, the arc support 111 is located in the middle of the top surface of the clamping seat, the side limit surface 112 is located on two sides of the arc support 111, a clamping groove 11 is formed between the arc support 111 and the side limit surfaces 112 on the two sides through wire cutting, the clamping groove 11 and the horizontal plane form an alpha oblique angle, and the alpha oblique angle is consistent with the alpha oblique angle of the clamping piece outer conical surface 32, so that the clamping piece outer conical surface 32 is in a horizontal state after the clamping piece 3 is placed into the clamping groove 11.
As shown in fig. 7, the structure of the clamping piece 3 is divided into two-piece type and three-piece type, the included angle β between the two-piece type clamping piece cutting surfaces 31 is 180 °, the included angle β between the three-piece type clamping piece cutting surfaces 31 is 120 °, and the included angle β between the two side limiting surfaces 112 is identical to the included angle β between the clamping piece cutting surfaces 31 and is 120 ° or 180 °.
As shown in fig. 3 and 7, the vertex of the inner arc surface of the clip 3 is a, the intersection point of the inner arc surface of the clip 3 and the clip cutting plane 31 is B, the vertical height between the intersection point a and the intersection point B is h1, the vertex of the top surface of the arc support 111 is C, the intersection point of the arc support 111 and the two side limiting surfaces 112 is D, the vertical height between the intersection point C and the intersection point D is h2, and h2 is h1+ (0.5-1.5) mm.
The baffle 2 can be fixed with the clamping seat 1 through screws or welding, and the baffle 2 is positioned on the lower inclination side end surface of the clamping groove 11 on the clamping seat 1 and used for limiting the downward sliding of the clamping piece 3.
The embodiment relates to a method for using an anchoring clip hardness detection pedestal, which comprises the following operation steps
Step 1: placing the pedestal on a base of a Rockwell hardness tester, and adjusting the position to ensure that the measuring head is basically aligned with the arc top line position of the clamping piece;
step 2: placing the clamping piece 3 on the arc support 111 of the clamping seat 1, placing two cutting surfaces of the clamping piece 3 in the clamping groove 11, and tightly attaching the inner arc tooth surface of the clamping piece 3 to the surface of the arc support 111 of the clamping groove;
and step 3: the big end of the clamping piece 3 faces the direction of the baffle 2, and the clamping piece 3 is pushed to be tightly attached to the baffle 2;
and 4, step 4: the cutting surface 31 at one side of the clamping piece 3 is tightly attached to the limiting surface 112 at one side of the clamping groove 11;
and 5: and (6) carrying out hardness detection.
In addition to the above embodiments, the present invention also includes other embodiments, and all technical solutions formed by equivalent transformation or equivalent replacement should fall within the protection scope of the claims of the present invention.
Claims (8)
1. A pedestal for detecting the hardness of a prestressed clamping piece is characterized in that: the clamping device comprises a clamping seat, the bottom surface level of clamping seat sets up, the top surface of clamping seat supports and the spacing face of side including the circular arc, the circular arc supports and is located in the middle of the clamping seat top surface, the spacing face of side is located the circular arc and supports both sides, forms the draw-in groove after the circular arc supports and the spacing face of side of both sides through the wire cutting processing, the draw-in groove forms alpha oblique angle with the horizontal plane, and alpha oblique angle is unanimous with the alpha oblique angle of the clamping piece ectoconical surface, makes after the clamping piece put into the draw-in groove, the clamping piece ectoconical surface is in the horizontality the draw-in groove underdip angle terminal surface of clamping seat is provided with the baffle for the restriction clamping piece slides downwards.
2. A stage for testing the hardness of a prestressed clip according to claim 1, characterized in that: the radian of the surface of the arc support is consistent with that of the arc surface of the clamping piece.
3. A stage for testing the hardness of a prestressed clip according to claim 1, characterized in that: the included angle beta between the two side limiting surfaces is consistent with the included angle beta between the cutting surfaces of the clamping pieces.
4. A stage for testing the hardness of a prestressed clip according to claim 3, characterized in that: the included angle beta is 120 degrees or 180 degrees.
5. A stage for testing the hardness of a prestressed clip according to claim 1, characterized in that: the top point of the inner arc of the clamping piece is A, the intersection point of the inner arc of the clamping piece and the cutting plane of the clamping piece is B, the vertical height between the intersection point A and the intersection point B is h1, the highest point of the top surface of the arc support is C, the intersection point of the arc support and the two side limiting surfaces is D, and the vertical height between the intersection point C and the intersection point D is h2, h2= h1+ (0.5-1.5) mm.
6. A stage for testing the hardness of a prestressed clip according to claim 1, characterized in that: the baffle is fixed with the clamping seat through a screw or a welding mode.
7. A stage for testing the hardness of a prestressed clip according to claim 1, characterized in that: the hardness range of the clamping seat is 60-70 HRC.
8. A bench for testing the hardness of a prestressed clip according to claim 6, characterized in that: the clamping seat and the baffle are made of metal materials, and the clamping seat is square or rectangular in shape.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022236587.XU CN214041003U (en) | 2020-10-10 | 2020-10-10 | Pedestal for detecting hardness of prestressed clamping piece |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022236587.XU CN214041003U (en) | 2020-10-10 | 2020-10-10 | Pedestal for detecting hardness of prestressed clamping piece |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214041003U true CN214041003U (en) | 2021-08-24 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022236587.XU Active CN214041003U (en) | 2020-10-10 | 2020-10-10 | Pedestal for detecting hardness of prestressed clamping piece |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214041003U (en) |
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2020
- 2020-10-10 CN CN202022236587.XU patent/CN214041003U/en active Active
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