Wire metallographic specimen longitudinal cutting clamping fixture, auxiliary fixture and combined fixture and their application

Abstract

The present invention discloses a longitudinal cutting clamping fixture, an auxiliary clamp and a combined clamp for metallographic specimens of wires and their applications, and belongs to the field of metallographic detection of wires. The longitudinal cutting clamping auxiliary clamp for metallographic specimens of wires of the present invention comprises a pad block 1 and a pad block 2 connected in a high and low step structure, and a cutting slit 1 through which a grinding wheel can pass is reserved between the two pad blocks. When cutting longitudinally, the metallographic specimen is placed flat on the cutting slit 1, and the high and low step structure can form a stable supporting structure for the metallographic specimen, so that the original double clamping surface of the metallographic specimen is added with another supporting surface, thereby improving the stability of the clamping. The present invention improves the clamping of the metallographic specimen of wires from the original double-sided clamping to three-sided or even four-sided clamping through the cooperation of the clamping fixture and the auxiliary clamp, effectively solving the problems of less clamping parts due to small specimen specifications, large specimen vibration during longitudinal cutting, easy specimen sliding and flying out to cause safety accidents, uneven specimen cutting surface or slope rework, etc.

Description

Technical Field

[0001] The invention relates to the technical field of wire metallographic detection, and more specifically to a small-sized wire metallographic sample longitudinal cutting clamp, an auxiliary clamp and a combined clamp and applications thereof. Background Art

[0002] The metallographic inspection of steel wire rod for cord requires the inspection of non-metallic inclusions on the longitudinal section of the sample with a diameter of 6.5mm or 5.5mm. Since the inclusions need to be inspected along the longitudinal rolling direction, the inspection surface is required to be as parallel to the longitudinal axis as possible.

[0003] For the longitudinal section sample preparation method of metallographic specimens with a diameter of 6.5mm or 5.5mm, two methods are usually used. One is to grind directly on a grinder after inlaying. The sample obtained by this method is usually at a certain angle to the longitudinal axis, and due to the large amount of grinding and long grinding time, it will also cause problems such as overheating and deformation of the sample; the other is to directly cut longitudinally on a metallographic cutting machine. This method is usually faster, but due to the small size of the sample and the small number of clamping parts, the sample vibrates relatively greatly during cutting, and it is easy for the sample to slide and fly out, resulting in safety accidents, uneven cutting surfaces of the sample or slope rework, etc. Therefore, in production inspection, the preparation of small-sized wire metallographic specimens has become a major bottleneck restricting rapid metallographic inspection.

[0004] After searching, the patent with Chinese patent announcement number, CN 203811439 U, announcement date 2014.09.03, discloses a metallographic sample cutting machine. It includes a clamping mechanism and a moving mechanism. The moving mechanism includes a lower slide, a middle slide, an upper slide, a transverse screw, and a longitudinal screw. The upper end of the lower slide is transversely provided with a dovetail groove guide rail, and the lower end of the middle slide is provided with a corresponding guide groove. The transverse screw is transversely provided on the lower slide through a threaded hole 1 on the guide block. The middle slide is arranged above the lower slide. The upper end of the middle slide is also longitudinally provided with a dovetail groove guide rail. The lower end of the upper slide is also provided with a longitudinal guide groove. The upper slide is arranged above the middle slide. The clamping mechanism is fixed on the upper end surface of the upper slide. The clamping mechanism includes a left clamping plate and a right clamping plate. The guide plate and the right clamping plate are parallelly fixed on the upper slide. The screw is transversely provided on the guide plate through a threaded hole 2. A hand wheel 1 is provided at one end of the screw, and a left clamping plate is vertically fixed at the other end. It is fixed by double clamping plates, but interference is likely to occur during cutting and damage the clamping plates. Summary of the invention

[0005] 1. Technical problem to be solved by the invention

[0006] The purpose of the present invention is to overcome the problems of uneven or sloped cutting surface of the longitudinal section of metallographic samples in the prior art, and to provide a longitudinal cutting clamp, an auxiliary clamp and a combined clamp for wire metallographic samples and their applications. By setting a cutting seam, damage to the clamp can be avoided during cutting after clamping, and the auxiliary clamp also plays a role in stabilizing the clamping.

[0007] 2. Technical solution

[0008] In order to achieve the above object, the technical solution provided by the present invention is:

[0009] The invention discloses an auxiliary fixture for longitudinal cutting and clamping of a wire metallographic sample, comprising a pad block 1 and a pad block 2 which are connected as a whole in a high and low step structure, a cutting slit 1 through which a grinding wheel can pass is reserved between the two pad blocks, when longitudinal cutting is performed, the wire metallographic sample is placed flat on the cutting slit 1, the high and low step structure can form a stable supporting structure for the wire metallographic sample, so that an additional supporting surface is added to the original double clamping surfaces of the wire metallographic sample, thereby improving the stability of clamping.

[0010] Furthermore, the width of the cutting seam 1 is smaller than the diameter of the wire metallographic sample, so as to avoid the wire metallographic sample falling into the cutting seam 1 due to being too small during cutting.

[0011] A longitudinal cutting clamp for metallographic wire specimens includes a bottom plate, a stopper 1 and a push rod; one end of the bottom plate is tilted upward to form a vertical plate, a cutting slit 2 is reserved in the middle of the vertical plate, the stopper 1 is slidably connected to the bottom plate, and the push rod is transversely fixedly connected to the front surface of the stopper 1; the metallographic wire specimen is clamped between the vertical plate and the stopper 1, at least half of the front end face of the metallographic wire specimen faces the grinding wheel, and the remaining front end face rests on the vertical plate. By reserving the cutting slit 2, damage to the fixture during cutting is effectively avoided.

[0012] Furthermore, it also includes block 2; the push rod passes through block 2 horizontally and is then fixed to the front surface of block 1, forming a double-row series structure of block 2 and block 1. Block 2 can slide along the push rod and can also be used when the sample is cut horizontally, thereby improving versatility and avoiding acting as a baffle during cutting to prevent iron chips from splashing everywhere.

[0013] Furthermore, the series structure formed by the push rod, the second stopper and the first stopper is two side-by-side structures with a cutting seam three formed in the middle, which can fix different samples or objects and improve cutting efficiency or clamping stability.

[0014] A combined fixture for longitudinal cutting of a wire metallographic sample comprises the above auxiliary fixture and a clamping fixture, wherein the two pads of the auxiliary fixture are close to the vertical plate, and the first cutting seam and the second cutting seam are connected; after the wire metallographic sample is placed flat on the first cutting seam, its two ends are clamped between the vertical plate and the first stopper.

[0015] Furthermore, it also includes a gasket, which is stacked on the bottom of the two pads of the auxiliary clamp and is used when the auxiliary clamp is insufficient to improve versatility.

[0016] Furthermore, a transition slope is provided on the upper surface of the pad block 2 near the cutting seam, which acts as a semi-support surface to prevent horizontal shaking during cutting and improve the stability of clamping. It is used for metallographic testing of small-sized wires with a diameter of less than 6.5 mm. The smaller the diameter, the more unstable the clamping, and the more suitable the combination clamp of this application is.

[0017] The invention discloses an application of a longitudinal cutting clamping fixture for a wire metallographic sample. A stopper is pushed forward on the upper surface of a bottom plate by a push rod to clamp the wire metallographic sample between a vertical plate and the stopper. At least half of the front end surface of the wire metallographic sample faces a grinding wheel, and the remaining front end surface is against the vertical plate. The grinding wheel is then pushed toward the wire metallographic sample to perform longitudinal cutting on the wire metallographic sample.

[0018] An application of a longitudinal cutting combined fixture for a wire metallographic specimen, comprising the following steps:

[0019] S1. Assembly: Assemble the two pads of the auxiliary fixture close to the vertical plate on the bottom plate. After the cutting seam 1 and the cutting seam 2 are kept in a connected state, place the wire metallographic sample flat on the cutting seam 1, and the peripheral surface of the wire metallographic sample is close to the step surface of the pad 1;

[0020] S2. Pressing: Pushing a stopper one forward on the upper surface of the bottom plate by a push rod to clamp the wire metallographic sample between the vertical plate and the stopper one, with at least half of the front end face of the wire metallographic sample facing the grinding wheel, and the remaining front end face against the vertical plate; at the same time, pushing another stopper one forward on the upper surface of the bottom plate by another push rod to clamp the auxiliary fixture between the vertical plate and the other stopper one;

[0021] S3, cutting: push the grinding wheel toward the wire metallographic sample to cut the wire metallographic sample longitudinally.

[0022] 3. Beneficial effects

[0023] Compared with the prior art, the technical solution provided by the present invention has the following beneficial effects:

[0024] The wire metallographic sample longitudinal cutting clamping fixture, auxiliary clamp and combined clamp and application thereof of the present invention, through the coordinated use of the clamping fixture and the auxiliary clamp, the clamping of the wire metallographic sample is improved from the original double-sided clamping to three-sided or even four-sided clamping, effectively solving the problem that the sample is small in size, the clamping part is small, the sample vibration is relatively large during cutting, it is easy to slide and fly out, safety accidents occur, the sample cutting surface is uneven or sloped rework, etc., in the process of longitudinal cutting of the sample, the combined clamp is used to stably support the sample to be cut, and the small-sized wire metallographic sample is guaranteed to be stable and not move during longitudinal cutting, and the processing surface is flat. The present invention effectively improves the quality of the preparation of small-sized wire metallographic samples, the cutting surface is parallel to the longitudinal axis and flat, does not produce a slope, significantly improves production efficiency, significantly shortens the inspection cycle, reduces the labor intensity of workers, avoids the safety hazards caused by fatigue production, thereby reducing the misdetection and misjudgment caused by unqualified sample quality, reduces production costs, and can be applied in laboratories conducting metallographic inspections. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a structural schematic diagram of the auxiliary clamp of the present invention;

[0026] Figure 2 It is a structural schematic diagram of the clamping fixture of the present invention;

[0027] Figure 3 It is a structural schematic diagram of a clamping fixture according to Embodiment 3 of the present invention;

[0028] Figure 4 It is a structural schematic diagram of the combined clamp of the present invention;

[0029] Figure 5 This is a schematic structural diagram of the auxiliary clamp of Example 5 of the present invention.

[0030] In the figure: 1, auxiliary fixture; 2, bottom plate; 3, stopper 1; 4, push rod; 5, stopper 2; 6, cutting seam 3; 7, gasket; 10, wire metallographic specimen; 11, gasket 1; 12, gasket 2; 13, cutting seam 1; 21, vertical plate; 22, cutting seam 2; 50, grinding wheel; 121, transition slope. DETAILED DESCRIPTION

[0031] In order to further understand the content of the present invention, the present invention is described in detail in conjunction with the accompanying drawings.

[0032] The present invention will be further described below in conjunction with the embodiments.

[0033] Example 1

[0034] The auxiliary fixture for longitudinal cutting and clamping of wire metallographic specimens in this embodiment is used for metallographic sampling of small-sized wires with a diameter of less than 6.5 mm, such as wires with a diameter of 6.5 mm or 5.5 mm. Figure 1 As shown, it includes a pad 11 and a pad 2 12 connected in a high-low step structure, and a cutting slit 13 is reserved between the two pads for the grinding wheel 50 to pass through. When cutting longitudinally, the wire metallographic sample 10 is placed flat on the cutting slit 13. The high-low step structure can form a stable support structure for the wire metallographic sample 10, so that the original double clamping surface of the wire metallographic sample 10 adds another support surface, thereby improving the clamping stability. The width of the cutting slit 13 should be smaller than the diameter of the wire metallographic sample 10 to avoid the wire metallographic sample 10 falling into the cutting slit 13 due to its too small diameter during cutting.

[0035] Example 2

[0036] The longitudinal cutting clamp of the wire metallographic specimen of this embodiment is as follows: Figure 2 As shown, it includes a bottom plate 2, a stopper 3 and a push rod 4; one end of the bottom plate 2 is tilted upward to form a vertical plate 21, a cutting slit 22 is reserved in the middle of the vertical plate 21, the stopper 3 is slidably connected to the bottom plate 2, and the push rod 4 is laterally fixedly connected to the front surface of the stopper 3; the wire metallographic sample 10 is clamped between the vertical plate 21 and the stopper 3, at least half of the front end face of the wire metallographic sample 10 faces the grinding wheel 50, and the remaining front end face is against the vertical plate 21. By reserving the cutting slit 22, the fixture is effectively prevented from being damaged during cutting.

[0037] Example 3

[0038] The longitudinal cutting and clamping fixture of the wire metallographic specimen of this embodiment is basically the same as that of the embodiment 2, except that Figure 3 As shown, it also includes a stopper 2 5; the push rod 4 passes through the stopper 2 5 horizontally and is then fixed to the front surface of the stopper 1 3, forming a double-row series structure of the stopper 2 5 and the stopper 1 3. The stopper 2 5 can slide along the push rod 4 and can also be used when the sample is cut horizontally, which improves versatility and can also avoid acting as a baffle during cutting to prevent iron chips from splashing everywhere. Figure 3 As shown, the series structure formed by the push rod 4, the second stopper 5 and the first stopper 3 is two side by side, and a cutting seam 3 6 is formed in the middle, which can fix different samples or objects to improve the cutting efficiency or the stability of the clamping.

[0039] In the application of the longitudinal cutting clamping fixture for wire metallographic specimens of the present embodiment, the push rod 4 pushes the stopper 3 forward on the upper surface of the bottom plate 2, and the wire metallographic specimen 10 is clamped between the vertical plate 21 and the stopper 3, with at least half of the front end face of the wire metallographic specimen 10 facing the grinding wheel 50, and the remaining front end face rests on the vertical plate 21, and then the grinding wheel 50 is pushed toward the wire metallographic specimen 10 to perform longitudinal cutting on the wire metallographic specimen 10.

[0040] Example 4

[0041] The wire metallographic sample longitudinal cutting assembly fixture of this embodiment is used for metallographic sampling of small-sized wires with a diameter of less than 6.5 mm, such as wires with a diameter of 6.5 mm or 5.5 mm. Figure 4 As shown, it includes the auxiliary fixture 1 of embodiment 1 and the clamping fixture of embodiment 2 or 3. In the auxiliary fixture 1, the width of the pad 11 is the same as that of the pad 2 12; the width of the pad 11 is less than 5 mm of the length of the wire metallographic sample 10; the height of the pad 2 12 is less than 94 mm of the height of the pad 11; the width of the cutting seam 13 is 1.5 times the thickness of the grinding wheel 50; the depth of the cutting seam 13 is 1 / 2 of the height of the pad 2 12; the length of the auxiliary fixture 1 is 40 mm; the height of the pad 11 and the pad 2 12 can be adjusted according to the height of the clamping fixture, and when the wire metallographic sample 10 is placed on the pad 2 12, the height of the sample from the ground is less than the height of the pad 11. When in use, the two pads of the auxiliary clamp 1 are close to the vertical plate 21, and the cutting seam 13 is connected to the cutting seam 22; after the wire metallographic sample 10 is placed flat on the cutting seam 13, its two ends are clamped between the vertical plate 21 and the stopper 3.

[0042] The application of the longitudinal cutting assembly fixture for wire metallographic specimens in this embodiment comprises the following steps:

[0043] S1. Assembly: The two pads of the auxiliary fixture 1 are assembled on the bottom plate 2 close to the vertical plate 21. After the cutting seam 13 and the cutting seam 22 are kept in a connected state, the wire metallographic sample 10 is placed flat on the cutting seam 13, and the peripheral surface of the wire metallographic sample 10 is close to the step surface of the pad 11;

[0044] S2. Pressing: Push the stopper 3 forward on the upper surface of the bottom plate 2 by the push rod 4, and clamp the wire metallographic sample 10 between the vertical plate 21 and the stopper 3, with at least half of the front end face of the wire metallographic sample 10 facing the grinding wheel 50, and the remaining front end face against the vertical plate 21; at the same time, push another stopper 3 forward on the upper surface of the bottom plate 2 by another push rod 4, and clamp the auxiliary fixture 1 between the vertical plate 21 and the other stopper 3;

[0045] S3, cutting: the grinding wheel 50 is pushed toward the wire metallographic sample 10 to cut the wire metallographic sample 10 longitudinally.

[0046] The combined fixture for longitudinal cutting of metallographic specimens of wires of the present embodiment and its application, through the coordinated use of the clamping fixture and the auxiliary fixture 1, improves the clamping of the metallographic specimen 10 of the wires from the original double-sided clamping to three-sided or even four-sided clamping, effectively solving the problems of small specimen specifications, less clamping parts, relatively large specimen vibration during cutting, easy specimen sliding and flying out, safety accidents, uneven or sloped cut surface rework of the specimen, etc. In the longitudinal cutting process of the specimen, the combined fixture is used to stably support the specimen to be cut, ensuring that the metallographic specimen of small-sized wires is stable and does not move during longitudinal cutting, and the cut surface is parallel to the longitudinal axis and flat without a slope, which significantly improves production efficiency, significantly shortens the inspection cycle, reduces the labor intensity of workers, avoids safety hazards caused by fatigue production, thereby reducing false detection and misjudgment caused by unqualified specimen quality, and reduces production costs. It can be applied in laboratories conducting metallographic inspections.

[0047] Example 5

[0048] The wire metallographic sample longitudinal cutting assembly fixture of this embodiment has the same basic structure as that of embodiment 4, but is different and improved in that it is applied to metallographic sampling of small-sized wires with a diameter of less than 6.5 mm, such as wires with a diameter of 6.5 mm or 5.5 mm. Figure 5 As shown, it also includes a gasket 7, which is stacked on the bottom of the two pads of the auxiliary clamp 1 and used when the auxiliary clamp 1 is insufficient to improve versatility. A transition slope 121 is provided on the upper surface of the pad 2 12 near the slit 1 13, which plays the role of a semi-support surface to prevent horizontal shaking during cutting and improve the stability of clamping; it is applied to metallographic testing of small-sized wires with a diameter of less than 6.5 mm. The smaller the diameter, the more unstable the clamping, and the more suitable the combined clamp of this application is.

[0049] The present invention and its embodiments are described schematically above, and the description is not restrictive. The drawings show only one embodiment of the present invention, and the actual structure is not limited thereto. Therefore, if a person skilled in the art is inspired by it and designs a structural method and an embodiment similar to the technical solution without creativity without departing from the purpose of the invention, they shall all fall within the protection scope of the present invention.

Claims

1. A longitudinal cutting combined fixture for metallographic specimens of wires, characterized by: It comprises an auxiliary fixture (1) and a clamping fixture; The auxiliary fixture (1) comprises a pad block (11) and a pad block (12) connected together in a high and low step structure, and a cutting slot (13) is reserved between the two pad blocks for the grinding wheel (50) to pass through; The clamping fixture comprises a bottom plate (2), a stopper 1 (3), a push rod (4) and a stopper 2 (5); one end of the bottom plate (2) is tilted upward to form a vertical plate (21), a cutting slit 2 (22) is reserved in the middle of the vertical plate (21), the stopper 1 (3) is slidably connected to the bottom plate (2), and the push rod (4) is transversely fixedly connected to the front surface of the stopper 1 (3); the wire metallographic sample (10) is clamped between the vertical plate (21) and the stopper 1 (3), at least half of the front end face of the wire metallographic sample (10) faces the grinding wheel (50), and the remaining front end face abuts against the vertical plate (21); the push rod (4) transversely passes through the stopper 2 (5) and is then fixed to the front surface of the stopper 1 (3), forming a series structure of the stopper 2 (5) and the stopper 1 (3); the series structure formed by the push rod (4), the stopper 2 (5) and the stopper 1 (3) is two side by side, with a cutting slit 3 (6) formed in the middle; The two cushion blocks of the auxiliary fixture (1) are closely attached to the vertical plate (21), and the first cutting seam (13) and the second cutting seam (22) are connected; the wire metallographic sample (10) is placed flat on the first cutting seam (13).

2. The combined clamp according to claim 1, characterized in that: The width of the cutting seam 1 (13) is smaller than the diameter of the wire metallographic sample (10).

3. The combined clamp according to claim 2, characterized in that: It also includes a gasket (7) stacked on the bottom of the two cushion blocks of the auxiliary clamp (1).

4. The combined clamp according to claim 3, characterized in that: The upper surface of the cushion block 2 (12) is provided with a transition slope (121) near the slit 1 (13); and is applied to metallographic testing of small-sized wires with a diameter of less than 6.5 mm.

5. An application of the combined clamp according to any one of claims 1 to 4, characterized in that: The stopper block (3) is pushed forward on the upper surface of the bottom plate (2) by a push rod (4), and the wire metallographic sample (10) is clamped between the vertical plate (21) and the stopper block (3), with at least half of the front end face of the wire metallographic sample (10) facing the grinding wheel (50) and the remaining front end face against the vertical plate (21). The grinding wheel (50) is then pushed toward the wire metallographic sample (10) to perform longitudinal cutting on the wire metallographic sample (10).

6. An application of the combined clamp according to any one of claims 1 to 4, characterized in that: The steps are: S1. Assembly: The two pads of the auxiliary fixture (1) are mounted on the bottom plate (2) in close contact with the vertical plate (21). After the cutting seam 1 (13) and the cutting seam 2 (22) are kept in a connected state, the wire metallographic sample (10) is placed flat on the cutting seam 1 (13), with the peripheral surface of the wire metallographic sample (10) close to the step surface of the pad 1 (11); S2. Pressing: Pushing a stopper (3) forward on the upper surface of the bottom plate (2) by means of a push rod (4) to clamp the wire metallographic sample (10) between the vertical plate (21) and the stopper (3), with at least half of the front end face of the wire metallographic sample (10) facing the grinding wheel (50) and the remaining front end face against the vertical plate (21); at the same time, pushing another stopper (3) forward on the upper surface of the bottom plate (2) by means of another push rod (4) to clamp the auxiliary fixture (1) between the vertical plate (21) and the other stopper (3); S3, cutting: pushing the grinding wheel (50) toward the wire metallographic sample (10) to cut the wire metallographic sample (10) longitudinally.

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