Breaking force detection clamp

Abstract

The utility model provides a breaking force detection clamp, and relates to the technical field of clamps. The support is arranged on the side wall of the base, the universal ball head is arranged on the support, the pull column connected with a tension tester is arranged on one side, far away from the support, of the universal ball head, the wedge-shaped pull groove is formed in the base, the two clamping blocks are arranged in the pull groove in a sliding mode, and the driving mechanism is arranged on the base and controls the clamping blocks to slide. The cylindrical transition sleeve is arranged between the two clamping blocks, the at least two groups of positioning assemblies are arranged on the transition sleeve, the driving mechanism pushes the two clamping blocks to slide so as to increase or decrease the distance between the two clamping blocks, and the transition sleeve is connected with the end part of the seed crystal fine grain. According to the utility model, the fine seed crystal can be connected and fixed, so that the fine seed crystal can be subjected to breaking force detection by a tensile testing machine.

Description

Technical Field

[0001] This utility model relates to the field of clamping technology, specifically to a clamping device for detecting breaking tensile force. Background Technology

[0002] Breaking tensile strength refers to the critical value at which a material transitions from uniform plastic deformation to localized concentrated plastic deformation, and it is also the maximum load-bearing capacity of a material under static tensile conditions. Tensile strength characterizes the resistance of a material to maximum uniform plastic deformation. Before being subjected to the maximum tensile stress, the deformation of a tensile specimen is uniform, but after exceeding this stress, the material begins to exhibit necking, i.e., concentrated deformation. For brittle materials with no (or very little) uniform plastic deformation, it reflects the material's fracture resistance.

[0003] In existing technologies, single-crystal pulling involves seed crystal introduction and necking to eliminate dislocations generated by the contact between the seed crystal and the silicon solution. Then, a single-crystal silicon rod is pulled out through shoulder formation and constant diameter pulling. The completeness of dislocation removal directly affects the quality of the single-crystal silicon rod, while the diameter of the fine crystal directly relates to the pulling length of the single-crystal silicon rod. Longer pulling lengths require higher load-bearing capacity from the fine crystal. By testing the tensile strength of the fine crystal, the minimum diameter for pulling the rod can be determined, shortening the dislocation removal time and saving production costs.

[0004] However, when using tensile testing machines to test the breaking tensile strength of seed crystals, there is no specialized fixture to hold the seed crystals, making it difficult to conduct breaking tensile tests on seed crystals. Utility Model Content

[0005] The purpose of this invention is to develop a tensile testing fixture that can connect and fix seed crystals so that the seed crystals can be tested for breaking tensile strength by a tensile testing machine.

[0006] This utility model is achieved through the following technical solution:

[0007] A breaking tensile strength testing fixture, comprising:

[0008] Base;

[0009] Supports are provided on the side walls of the base;

[0010] The universal ball joint is located on the support;

[0011] The tie rod connected to the tensile testing machine is located on the side of the universal ball joint away from the support;

[0012] A wedge-shaped groove is formed on the base;

[0013] Two clamping blocks are slidably positioned within the pull groove;

[0014] The drive mechanism, located on the base, controls the sliding of the clamping blocks;

[0015] A cylindrical transition sleeve is positioned between the two clamping blocks;

[0016] At least two sets of positioning components are provided on the transition sleeve;

[0017] The driving mechanism pushes the two clamping blocks to slide to increase or decrease the distance between the two clamping blocks, and the transition sleeve is connected to the end of the seed crystal.

[0018] Optionally, a connecting seat is provided on the side wall of the base, and a connecting post is provided on the side wall of the connecting seat away from the base. A connecting hole is provided on the side of the connecting post away from the connecting seat, and the connecting hole penetrates the connecting post. The part of the connecting post near the connecting seat is provided with external threads. The support is connected to the connecting post. The end of the support connected to the connecting post is a sleeve structure and is threadedly connected to the external threads on the connecting post. A corresponding insertion hole is provided on the support to mate with the connecting hole. A pin is provided in the insertion hole and the connecting hole.

[0019] Optionally, the groove is an isosceles trapezoid, with the large-diameter end of the groove located in the middle of the base, and the small-diameter end of the groove penetrating through the base.

[0020] Optionally, the clamping blocks are wedge-shaped, with the sidewalls of the two clamping blocks that are close to each other perpendicular to the large-diameter end of the groove, and the sidewalls of the two clamping blocks that are far apart from each other forming inclined surfaces that cooperate with the sidewalls of the groove.

[0021] Optionally, the driving mechanism includes a driving rod disposed inside the groove and slidably connected to the base, the end of the driving rod having an enlarged end, and the clamping block having a slot on the side near the driving rod that engages with the enlarged end of the driving rod.

[0022] Optionally, the enlarged end is a circular plate coaxial with the drive rod, the slot is set parallel to the enlarged end, and the width of the slot is greater than the radius of the flared end.

[0023] Optionally, the top of the drive rod is a rack structure, and a drive block is rotatably provided on the base of the top of the drive rod. The bottom of the drive block has a gear structure and meshes with the rack structure at the top of the drive rod.

[0024] Optionally, a handle is connected to the drive block, the handle is rotatably connected to the base, and a torsion spring is provided between the handle and the base.

[0025] Optionally, the base is provided with two locking blocks, which are respectively located at the top of the two side walls of the groove and above the two clamping blocks.

[0026] Optionally, the positioning assembly includes a plurality of positioning rods threaded onto the transition sleeve, the positioning rods being arranged radially along the transition sleeve.

[0027] The beneficial effects of this utility model are:

[0028] This invention allows the seed crystal to be connected to a tensile testing machine so that the seed crystal can be tested for breaking tensile strength. The seed crystal is coaxially connected to the transition sleeve and filled with high-viscosity strong adhesive. The adhesive is directly bonded to the seed crystal, ensuring that the break point during the breaking tensile strength test is the seed crystal body itself, and not other locations. Attached Figure Description

[0029] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0030] Figure 1 This is a structural diagram of the present utility model;

[0031] Figure 2 This is a diagram of the internal structure of the transition sleeve.

[0032] Reference numerals: 1. Base; 2. Connecting seat; 3. Support; 4. Tie column; 5. Transition sleeve; 51. Positioning rod; 6. Clamping block; 7. Locking block; 8. Slot; 9. Enlarged end; 10. Handle; 11. Drive rod; 12. Drive block. Detailed Implementation

[0033] In the following description, only certain exemplary embodiments are briefly described. As those skilled in the art will recognize, the described embodiments can be modified in various ways without departing from the spirit or scope of the invention. Therefore, the drawings and description are considered to be exemplary in nature and not restrictive.

[0034] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting this invention.

[0035] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a communication connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0036] The embodiments of the present invention will now be described in detail with reference to the accompanying drawings.

[0037] like Figure 1 and Figure 2 As shown, this utility model discloses a breaking tensile strength testing fixture, including a base 1, on which a wedge-shaped groove is formed. Specifically, the groove is an isosceles trapezoid, with the large-diameter end of the groove, that is, the inner end of the groove, located in the middle of the base 1, and the small-diameter end of the groove penetrating the base 1, that is, the outer end of the groove being an open end.

[0038] Two wedge-shaped clamping blocks 6 are placed inside the groove. The sidewalls of the two clamping blocks 6 that are close to each other are perpendicular to the large-diameter end of the groove, while the sidewalls of the two clamping blocks 6 that are far apart are inclined surfaces that mate with the sidewalls of the groove. A removable and insertable transition sleeve 5 is provided between the two clamping blocks 6. The transition sleeve 5 is cylindrical and filled with high-viscosity strong adhesive to bond it to the seed crystal. When the two clamping blocks 6 are subjected to a pushing force towards the small-diameter end of the groove, the two clamping blocks 6 slide against the sidewalls of the groove, and the two clamping blocks 6 move closer together, clamping the transition sleeve 5 between them. Correspondingly, when the two clamping blocks 6 are subjected to a pulling force towards the large-diameter end of the groove, the two sides of the two clamping blocks 6 are not restricted by the sidewalls of the groove, and the gap between the two clamping blocks 6 can be widened, allowing the transition sleeve 5 between the two clamping blocks 6 to be removed.

[0039] A set of positioning components is provided at each end of the transition sleeve 5. The positioning components ensure that the seed crystal is coaxial with the transition sleeve 5. The positioning components include three positioning rods 51 threaded to the transition sleeve 5 and arranged radially along the transition sleeve 5. The three positioning rods 51 are evenly spaced in the circumferential direction of the transition sleeve 5. Rotating the positioning rods 51 allows them to move radially along the transition sleeve 5. The outer end of the positioning rod 51 is a structure such as an internal hexagonal socket or a cross groove, so that the positioning rod 51 can be turned with a tool such as an internal hexagonal wrench or a screwdriver. The outer end of the positioning rod 51 is inside the transition sleeve 5, avoiding the possibility of the positioning rod 51 contacting the clamping block 6. When the positioning components position the seed crystal, the seed crystal extends into the transition sleeve 5. Then, the three positioning rods 51 are rotated so that the inner ends of the three positioning rods 51 are screwed into the transition sleeve 5 to the same depth. The inner ends of the three positioning rods 51 abut against the seed crystal, thereby positioning the seed crystal and ensuring that the seed crystal is coaxial with the transition sleeve 5.

[0040] The base 1 is provided with two locking blocks 7, which are bolted to the base 1. The two locking blocks 7 are located at the top of the two side walls of the groove and above the two clamping blocks 6. Removing the locking blocks 7 allows the two clamping blocks 6 to be placed into or removed from the groove. Installing the locking blocks 7 restricts the two clamping blocks 6 within the groove, preventing them from falling out.

[0041] The inner end of the groove, i.e., the large-diameter end of the groove, is equipped with a driving mechanism for sliding the two clamping blocks 6. The driving mechanism includes a driving rod 11 slidably mounted on the base 1. The driving rod 11 is located in the middle of the groove and slides in a direction parallel to the height of the isosceles trapezoidal groove. The end of the driving rod 11 near the groove is an enlarged end 9, which is a circular plate coaxial with the driving rod 11. Each of the two clamping blocks 6 is provided with a slot 8 near the inner side of the groove, which cooperates with the enlarged end 9 of the driving rod 11. The slot 8 is parallel to the enlarged end 9, and the width of the slot 8 is greater than the radius of the flared end. When the two clamping blocks 6 are placed into and removed from the groove, the enlarged end 9 of the driving rod 11 slides into or out of the slot 8. After the enlarged end 9 of the driving rod 11 is engaged in the slot 8, the driving rod 11 is movably connected to the two clamping blocks 6, and the sliding of the driving rod 11 drives the two clamping blocks 6 to slide.

[0042] The top of the drive rod 11 has a rack structure. A handle 10 is rotatably mounted on the base 1 above the drive rod 11. The axis of rotation of the handle 10 is horizontal and perpendicular to the sliding direction of the drive rod 11. A torsion spring is provided between the handle 10 and the base 1, and the elastic force of the torsion spring causes the handle 10 to rotate elastically. A drive block 12 is provided at the bottom of the handle 10. The bottom of the drive block 12 is in the shape of an arc with the axis of rotation of the handle 10 as the center, and the arc-shaped bottom of the drive block 12 is a gear structure that meshes with the rack structure at the top of the drive rod 11. When the handle 10 is swung to rotate, the drive block 12 at the bottom of the handle 10 meshes with the drive rod 11, and the drive rod 11 slides, pushing the clamping blocks 6 to slide. When no external force is applied, the elastic force of the torsion spring drives the handle 10 to rotate, causing the drive block 12 to drive the drive rod 11 to slide towards the outer end of the groove, and causing the two clamping blocks 6 to slide towards the small diameter end of the groove.

[0043] A connecting seat 2 is provided on the side wall of the base 1 away from the small-diameter end of the groove. A connecting column is provided on the side wall of the connecting seat 2 away from the base 1. A connecting hole is provided on the side of the connecting column away from the connecting seat 2, and the connecting hole penetrates the connecting column. The part of the connecting column near the connecting seat 2 has external threads. A support 3 is provided on the connecting column. The end of the support 3 that connects to the connecting column is a sleeve structure and is threaded to the external threads on the connecting column. A corresponding insertion hole is provided on the support 3 to mate with the connecting hole. After the support 3 and the connecting column are threadedly connected, the insertion hole and the connecting hole are in a coaxial state. A pin is provided in the insertion hole and the connecting hole. A universal ball joint is provided at the end of the support 3 away from the connecting column. A tie column 4 is provided on the side of the universal ball joint away from the support 3. The tie column 4 is used to connect to a tensile testing machine. The universal ball joint can be adjusted at an angle ≥15°.

[0044] When placing the seed crystal into the tensile testing machine for breaking tensile test, insert the end of the seed crystal into the transition sleeve 5, and use the positioning component to make the seed crystal coaxial with it inside the transition sleeve 5. Then, pour high-viscosity strong adhesive into the transition sleeve 5 to connect and fix the seed crystal to the transition sleeve 5. Then connect the pull column 4 to the tensile testing machine to perform the breaking tensile test of the seed crystal.

[0045] This invention allows the seed crystal to be connected to a tensile testing machine so that the seed crystal can be tested for breaking tensile strength. The seed crystal is coaxially connected to the transition sleeve 5 and filled with high-viscosity strong adhesive. The adhesive is directly bonded to the seed crystal, ensuring that the break point during the breaking tensile strength test is the seed crystal body itself, and not other locations.

[0046] The above embodiments are merely preferred embodiments of this utility model and are not intended to limit the technical solutions of this utility model. Any technical solution that can be implemented based on the above embodiments without creative effort should be considered to fall within the scope of protection of this utility model patent.

Claims

1. A clamp for testing breaking tensile strength, characterized in that, include: Base; Supports are provided on the side walls of the base; The universal ball joint is located on the support; The tie rod connected to the tensile testing machine is located on the side of the universal ball joint away from the support; A wedge-shaped groove is formed on the base; Two clamping blocks are slidably positioned within the pull groove; The drive mechanism, located on the base, controls the sliding of the clamping blocks; A cylindrical transition sleeve is positioned between the two clamping blocks; At least two sets of positioning components are provided on the transition sleeve; The driving mechanism pushes the two clamping blocks to slide to increase or decrease the distance between the two clamping blocks, and the transition sleeve is connected to the end of the seed crystal.

2. The tensile strength testing fixture according to claim 1, characterized in that, A connecting seat is provided on the side wall of the base, and a connecting post is provided on the side wall of the connecting seat away from the base. A connecting hole is provided on the side of the connecting post away from the connecting seat, and the connecting hole penetrates the connecting post. The part of the connecting post near the connecting seat is provided with external threads. The support is connected to the connecting post. The end of the support connected to the connecting post is a sleeve structure and is threadedly connected to the external threads on the connecting post. A corresponding insertion hole is provided on the support to mate with the connecting hole. A pin is provided in the insertion hole and the connecting hole.

3. The tensile strength testing fixture according to claim 1, characterized in that, The groove is an isosceles trapezoid, with the large-diameter end of the groove located in the middle of the base, and the small-diameter end of the groove penetrating through the base.

4. The tensile strength testing fixture according to claim 3, characterized in that, The clamping blocks are wedge-shaped, with the sidewalls of the two clamping blocks that are close to each other perpendicular to the large-diameter end of the groove, and the sidewalls of the two clamping blocks that are far apart from each other forming inclined surfaces that cooperate with the sidewalls of the groove.

5. The tensile strength testing fixture according to claim 1, characterized in that, The driving mechanism includes a driving rod located inside the groove and slidably connected to the base. The end of the driving rod is provided with an enlarged end, and the clamping block is provided with a slot on the side near the driving rod that engages with the enlarged end of the driving rod.

6. The tensile strength testing fixture according to claim 5, characterized in that, The enlarged end is a circular plate coaxial with the drive rod, and the slot is set parallel to the enlarged end, with the width of the slot being greater than the radius of the flared end.

7. The tensile strength testing fixture according to claim 5, characterized in that, The top of the drive rod is a rack structure, and a drive block is rotatably mounted on the base of the top of the drive rod. The bottom of the drive block has a gear structure and meshes with the rack structure at the top of the drive rod.

8. The tensile strength testing fixture according to claim 7, characterized in that, A handle is connected to the drive block, and the handle is rotatably connected to the base. A torsion spring is provided between the handle and the base.

9. The tensile strength testing fixture according to any one of claims 1 to 8, characterized in that, The base is provided with two locking blocks, which are located at the top of the two side walls of the groove and above the two clamping blocks.

10. The tensile strength testing fixture according to any one of claims 1 to 8, characterized in that, The positioning assembly includes a plurality of positioning rods threaded onto the transition sleeve, the positioning rods being arranged radially along the transition sleeve.

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