Plate impact sample machining and positioning clamp

Abstract

The invention belongs to the field of plate impact sample processing, and particularly relates to a plate impact sample processing positioning fixture which comprises a positioning plate, a supporting block, first pressing mechanisms and second pressing mechanisms are arranged on the positioning plate, the first pressing mechanisms are arranged on the left side and the right side of the supporting block, and the second pressing mechanisms are arranged on the left side and the right side of the supporting block. The second pressing mechanism comprises two second rotary clamping oil cylinders and a second special-shaped pressing plate, the second rotary clamping oil cylinders are symmetrically arranged on the front side and the rear side of the supporting block, the second special-shaped pressing plate is installed on piston shafts of the second rotary clamping oil cylinders, and three cutting grooves are longitudinally formed in the supporting block at equal intervals. The second special-shaped pressing plate is in an L shape, the width of the second special-shaped pressing plate is the same as that of the supporting block between the cutting grooves in the outer side, and a cutting groove matched with the cutting groove in the middle of the supporting block is formed in the middle of the second special-shaped pressing plate. According to the invention, processing of a plurality of plate samples can be realized through one-time clamping, and the processing efficiency of the plate samples is improved.

Description

Technical Field

[0001] The present invention belongs to the field of sheet sample processing, and particularly relates to a positioning fixture for processing sheet impact samples. Background Art

[0002] With the development of industry, especially in the fields of aerospace, shipbuilding, and pressure vessels, the requirements for the toughness and impact resistance of materials are becoming increasingly strict. Impact tests have become a key means to measure the fracture resistance of materials under high-speed loads.

[0003] Intelligent manufacturing has become the main trend of the development of the manufacturing industry. At present, the realization of processes such as raw material sampling and sample preparation in the upstream of steel mills, rapid analysis in the middle stream of steelmaking, and macro-examination of continuous casting depends on the fully automatic sampling processing and inspection technologies of manipulators and centralized control systems.

[0004] However, in the process of sheet sample processing, traditional positioning fixtures mostly adopt a single clamping structure, which can only fix a single sheet sample block. The manipulator needs to be repeatedly clamped to achieve multi-sample processing, significantly reducing the production efficiency. Moreover, the layout of the clamping mechanisms of existing fixtures is rigid, making it difficult to adapt to the requirements of multi-station synchronous processing, and lacking a positioning design coordinated with the cutting process, resulting in easy displacement of the samples during cutting, affecting the processing accuracy, and further restricting the processing efficiency and finished product quality.

[0005] Therefore, there is an urgent need for a fixture solution that can achieve synchronous processing of multiple samples with one clamping, and improve the positioning accuracy and efficiency. Summary of the Invention

[0006] In view of the problems existing in the above-mentioned prior art, the present invention discloses a positioning fixture for processing sheet impact samples. Through the setting of the first clamping mechanism and the second clamping mechanism, the present invention can complete the processing of multiple sheet samples with one clamping. The present invention specifically discloses the following technical solutions:

[0007] A positioning fixture for processing sheet impact samples, comprising a positioning plate, on which a support block, a first pressing mechanism, and a second pressing mechanism are arranged. The first pressing mechanism is arranged on the left and right sides of the support block. The second pressing mechanism includes two second rotary clamping cylinders and a second special-shaped pressing plate. The second rotary clamping cylinders are symmetrically arranged on the front and rear sides of the support block. The second special-shaped pressing plate is installed on the piston shaft of the second rotary clamping cylinder. Three cutting grooves are longitudinally and equidistantly arranged on the support block. The second special-shaped pressing plate is L-shaped, and the width of the second special-shaped pressing plate is the same as the width of the support block between the two outer cutting grooves. A cutting groove matching the middle cutting groove of the support block is arranged in the middle of the second special-shaped pressing plate.

[0008] Further, the first pressing mechanism includes a first positioning seat, a second positioning seat, two first rotary clamping cylinders, and two first special-shaped pressing plates. The first positioning seat and the second positioning seat are respectively arranged on the left and right sides of the support block. The first rotary clamping cylinders are respectively arranged on the first positioning seat and the second positioning seat. The first special-shaped pressing plate is installed on the piston shaft of the first rotary clamping cylinder.

[0009] Further, two spaced-apart limit blocks are arranged at the top of the side of the support block close to the first positioning seat.

[0010] Further, the second positioning seat is L-shaped and includes a side plate and a bottom plate. A rectangular groove is formed at the top of the side plate. The width of the rectangular groove is equal to the spacing between the two limit blocks. The top of the rectangular groove is chamfered.

[0011] Further, a relief groove is formed at the bottom of the second special-shaped pressing plate corresponding to the side plate.

[0012] Further, mounting holes are arranged on the side plates on both sides of the rectangular groove corresponding to the limit blocks, and a positioning mechanism is arranged in the mounting holes.

[0013] Further, the positioning mechanism includes a housing, a ball, and a spring. Internal threads are arranged in the mounting holes. External threads are correspondingly arranged on the surface of the housing. The housing is threadedly connected to the mounting holes. The front end of the housing is a mounting groove with a closed end. The ball and the spring are slidably arranged in the mounting groove from outside to inside in sequence.

[0014] Further, the end of the mounting groove is closed. One end of the spring abuts against the ball, and the other end of the spring abuts against the housing. An internal hexagonal groove is arranged at the tail end of the housing.

[0015] Further, the mounting groove penetrates through the housing. An adjusting bolt is also threadedly connected in the mounting hole. A limit protrusion is arranged at the front end of the adjusting bolt. The limit protrusion extends into the mounting groove. One end of the spring abuts against the ball, and the other end of the spring abuts against the limit protrusion.

[0016] Further, an external hexagonal boss for easy adjustment is arranged at the front end of the housing.

[0017] The beneficial effects of the present invention are as follows:

[0018] 1. By arranging a support block, a first pressing mechanism, and a second pressing mechanism, and correspondingly forming cutting grooves on the support block and the second pressing mechanism, the present invention can skillfully utilize the cutting groove of the second pressing mechanism to cut the plate sample while positioning the plate, and can cut the plate into four impact sample blocks at one time, improving the processing efficiency of the impact sample.

[0019] 2. The present invention is provided with limit blocks arranged at intervals and rectangular grooves on the side, which facilitates the placement of the plate sample block and avoids the collision between the manipulator gripper and the positioning fixture when placing the sample block.

[0020] 3. The positioning mechanism of the present invention can quickly position the plate sample block placed on the support block by using steel balls and springs, improving the cutting accuracy of the sample block and avoiding processing errors. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 is a schematic diagram of the main structure of the present invention;

[0022] Figure 2 is a side view of the first pressing mechanism and the second pressing mechanism of the present invention;

[0023] Figure 3 is a schematic diagram of the cutting groove of the second pressing mechanism and the support block of the present invention;

[0024] Figure 4 is a schematic diagram of the structure of the support block of the present invention;

[0025] Figure 5 is a schematic diagram of the structure of the second positioning seat of the present invention;

[0026] Figure 6 is a sectional view of the second positioning seat in Embodiment 1 of the present invention;

[0027] Figure 7 is a sectional view of the second positioning seat in Embodiment 2 of the present invention.

[0028] Among them, 1, positioning plate; 2, support block; 3, first positioning seat; 4, second positioning seat; 5, first rotary clamping oil cylinder; 6, first special-shaped pressing plate; 7, second rotary clamping oil cylinder; 8, second special-shaped pressing plate; 9, plate sample block; 10, limit block; 11, relief groove; 12, housing; 13, ball; 14, spring; 15, adjusting bolt; 16, limit projection; 17, external hexagonal boss. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0029] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0030] Embodiment 1

[0031] Refer to the attached Figures 1-6, this embodiment discloses a positioning fixture for processing a sheet impact specimen, which includes a positioning plate 1 fixed on the workbench of a numerical control machining center. A support block 2, a first pressing mechanism, and a second pressing mechanism are arranged on the positioning plate 1.

[0032] The first pressing mechanism includes a first positioning seat 3, a second positioning seat 4, two first rotary clamping cylinders 5, and two first special-shaped pressing plates 6. The first positioning seat 3 and the second positioning seat 4 are respectively arranged on the left and right sides of the support block 2. The first rotary clamping cylinders 5 are respectively arranged on the first positioning seat 3 and the second positioning seat 4. The first special-shaped pressing plate 6 is installed on the piston shaft of the first rotary clamping cylinder 5.

[0033] The second pressing mechanism includes two second rotary clamping cylinders 7 and a second special-shaped pressing plate 8. The second rotary clamping cylinders 7 are symmetrically arranged on the front and rear sides of the support block 2. The second special-shaped pressing plate 8 is installed on the piston shaft of the second rotary clamping cylinder 7. Three cutting grooves are longitudinally and equidistantly arranged on the support block 2. The second special-shaped pressing plate 8 is L-shaped, and the width of the second special-shaped pressing plate 8 is the same as the width of the support block 2 between the two outer cutting grooves. A cutting groove matching the middle cutting groove of the support block 2 is arranged in the middle of the second special-shaped pressing plate 8.

[0034] The first pressing mechanism and the second pressing mechanism are jointly used for pressing and positioning the sheet specimen 9. The 4 rotary pressing cylinders in this embodiment are controlled by one oil circuit. Before the manipulator grabs the sheet specimen 9 and enters the working area, the numerical control machining center controls the hydraulic station to lift and rotate the pistons of the four cylinders. When the manipulator clamps and places the sheet specimen 9 on the support block 2, the 4 rotary pressing cylinders are started together to clamp the sheet specimen 9. Then, a laser cutting machine or a high-speed circular saw is used to cut the sheet specimen 9. The setting of the cutting grooves can ensure that the sheet specimen 9 is firmly fixed during the cutting process.

[0035] To facilitate the placement and positioning of the sheet specimen 9, two spaced-apart limit blocks 10 are arranged at the top of the side of the support block 2 close to the first positioning seat 3. The second positioning seat 4 is L-shaped and includes a side plate and a bottom plate. A rectangular groove is opened at the top of the side plate, and the width of the rectangular groove is equal to the spacing between the two limit blocks 10. The top of the rectangular groove is chamfered. One side jaw of the manipulator passes through the spacing between the limit blocks 10, and the other side jaw realizes the placement of the sheet specimen 9 through the rectangular groove, avoiding the collision between the jaw and the positioning fixture.

[0036] As a preferred embodiment of the present invention, in order to avoid interference between the second special-shaped pressing plate 8 and the side plate of the second positioning seat 4, a relief groove 11 is also opened at the bottom of the second special-shaped pressing plate 8 corresponding to the side plate.

[0037] In order to further improve the positioning accuracy of the placement of the sheet sample block 9, in this embodiment, mounting holes are provided on the side plates on both sides of the rectangular groove corresponding to the limiting blocks 10, and a positioning mechanism is arranged in the mounting holes.

[0038] Specifically, the positioning mechanism in this embodiment includes a housing 12, a ball 13 and a spring 14. Internal threads are provided in the mounting holes, and external threads are correspondingly provided on the surface of the housing 12. The housing 12 is threadedly connected to the mounting holes. The front end of the housing 12 is a mounting groove with a closed end structure. The ball 13 and the spring 14 are slidably arranged in the mounting groove from outside to inside in sequence. The end of the mounting groove is closed. One end of the spring 14 abuts against the ball 13, and the other end of the spring 14 abuts against the housing 12. The spring 14 in the present invention is in a compressed state. The setting of the spring 14 enables the ball 13 to partially protrude from the mounting groove, which can not only have a certain guiding effect on the sheet sample block 9 when it is placed, but also tightly hold it against the limiting block 10 through the ball 13 after the sheet sample block 9 is placed, thus completing the positioning of the sheet sample block 9.

[0039] As a preferred embodiment of the present invention, an internal hexagonal groove is provided at the tail end of the housing 12, which is convenient for adjusting the protruding length of the positioning mechanism.

[0040] Embodiment 2

[0041] As Figure 7 shown, the difference between this embodiment and Embodiment 1 is that in this embodiment, the mounting groove penetrates through the tail end of the housing 12, and an adjusting bolt 15 is also threadedly connected in the mounting hole. A limiting protrusion 16 is provided at the front end of the adjusting bolt 15. The limiting protrusion 16 extends into the mounting groove. One end of the spring 14 abuts against the ball 13, and the other end of the spring 14 abuts against the limiting protrusion 16. The setting of the adjusting bolt 15 can adjust the compression length of the spring 14, thereby realizing the adjustment of the telescopic force of the ball 13, and avoiding the situation that the sheet sample block 9 is propped on the ball 13 due to the excessive elastic force of the spring 14 when the sheet sample block 9 is placed.

[0042] As a preferred embodiment of the present invention, an external hexagonal boss 17 for easy adjustment is provided at the front end of the housing 12. First, the protruding length of the housing 12 can be adjusted through a hexagonal wrench, and then by screwing the adjusting bolt 15, the elasticity of the spring 14 can be adjusted to ensure that the positioning mechanism is in a suitable position and can control the elasticity of the spring 14 so that the ball 13 can tightly hold the sheet sample block 9 while ensuring rolling.

[0043] The above is only a preferred embodiment of the present invention, and does not impose any limitation on the technical scope of the present invention. Therefore, any minor modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention still belong to the scope of the technical solution of the present invention.

Claims

1. A plate impact specimen processing and positioning fixture, characterized in that: It includes a positioning plate, on which a support block, a first clamping mechanism and a second clamping mechanism are arranged, the first clamping mechanism is arranged on the left and right sides of the support block, the second clamping mechanism includes two second rotary clamping cylinders and a second special-shaped pressure plate, the second rotary clamping cylinders are symmetrically arranged on the front and rear sides of the support block, the second special-shaped pressure plate is installed on the piston shaft of the second rotary clamping cylinder, three cutting grooves are arranged on the support block at equal intervals in the longitudinal direction, the second special-shaped pressure plate is L-shaped, the width of the second special-shaped pressure plate is the same as the width of the support block between the outer cutting grooves, and the middle part of the second special-shaped pressure plate is provided with a cutting groove matching the cutting groove in the middle part of the support block.

2. A plate impact specimen processing and positioning fixture according to claim 1, characterized in that: The first clamping mechanism includes a first positioning seat, a second positioning seat, two first rotary clamping cylinders, and two first special-shaped pressure plates. The first positioning seat and the second positioning seat are respectively arranged on the left and right sides of the support block. The first rotary clamping cylinder is respectively arranged on the first positioning seat and the second positioning seat. The first special-shaped pressure plate is installed on the piston shaft of the first rotary clamping cylinder.

3. A plate impact specimen processing and positioning fixture according to claim 1, characterized in that: Two spaced-apart limiting blocks are arranged on the top of one side of the support block close to the first positioning seat.

4. A plate impact specimen processing and positioning fixture according to claim 2, characterized in that: The second positioning seat is L-shaped, including a side plate and a bottom plate. A rectangular groove is opened on the top of the side plate. The width of the rectangular groove is equal to the distance between the two limit blocks, and the top of the rectangular groove is chamfered.

5. A plate impact specimen processing and positioning fixture according to claim 4, characterized in that: A clearance groove is formed at the bottom of the second special-shaped pressing plate corresponding to the side plate.

6. A plate impact specimen processing and positioning fixture according to claim 4, characterized in that: The side plates at both sides of the rectangular groove are provided with mounting holes corresponding to the limit blocks, and positioning mechanisms are provided in the mounting holes.

7. A plate impact specimen processing and positioning fixture according to claim 6, characterized in that: The positioning mechanism includes a shell, a ball and a spring. The mounting hole is provided with an internal thread, and the surface of the shell is correspondingly provided with an external thread. The shell is threadedly connected to the mounting hole. The front end of the shell is a mounting groove of a closing structure. The ball and the spring are slidably arranged in the mounting groove from the outside to the inside in sequence.

8. The plate impact specimen processing and positioning fixture according to claim 7, characterized in that: The end of the mounting groove is closed, one end of the spring is in contact with the ball, the other end of the spring is in contact with the shell, and the tail end of the shell is provided with a hexagonal groove.

9. The plate impact specimen processing and positioning fixture according to claim 7, characterized in that: The mounting groove passes through the shell, and an adjusting bolt is threadedly connected in the mounting hole. A limiting protrusion is arranged at the front end of the adjusting bolt, and the limiting protrusion extends into the mounting groove. One end of the spring conflicts with the ball, and the other end of the spring conflicts with the limiting protrusion.

10. A plate impact specimen processing and positioning fixture according to claim 9, characterized in that: The front end of the shell is provided with an external hexagonal boss which is convenient for adjustment.

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