CN114894564A - Longitudinal cutting and clamping jig, auxiliary jig and combination jig for wire metallographic specimen and its application - Google Patents

Abstract

The invention discloses a longitudinal cutting and clamping fixture, an auxiliary fixture and a combined fixture for a wire metallographic sample and its application, and belongs to the field of wire metallographic detection. The longitudinal cutting and clamping auxiliary fixture for wire metallographic samples of the present invention comprises a spacer block 1 and a spacer block 2 which are connected in a high and low step structure. When cutting, the metallographic sample is placed flat on the cutting seam, and the high and low step structure can form a stable body structure of the metallographic sample, so that the original double-clamping surface of the metallographic sample can be added with a rest surface, which improves the clamping force. holding stability. Through the cooperation of the clamping fixture and the auxiliary fixture, the invention improves the clamping of the wire metallographic sample from the original double-sided clamping to the three-sided or even four-sided clamping, which effectively solves the problem of less clamping parts due to the small size of the sample. , The sample vibrates greatly during longitudinal cutting, and it is easy to cause safety accidents due to the sliding and flying of the sample, and the insufficiency of the uneven cutting surface of the sample or the rework of the slope.

Description

Longitudinal cutting and clamping fixtures, auxiliary fixtures and combined fixtures for wire metallographic specimens and their applications

technical field

The invention relates to the technical field of wire metallographic detection, and more particularly, to a small-sized wire metallographic sample longitudinal cutting and clamping fixture, an auxiliary fixture and a combined fixture and its application.

Background technique

The metallographic inspection of steel wire rods for cords 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 for the extension length along the longitudinal rolling direction, the inspection surface is required to be as large as possible. Possibly parallel to the longitudinal axis.

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. At a certain angle, and due to the large amount of grinding and the long grinding time, it will also cause problems such as overheating and deformation of the sample; the other is to directly cut longitudinally on the metallographic cutting machine. This method is usually faster, but due to The sample size is small, the clamping part is small, the sample vibration is relatively large during cutting, it is easy to cause the sample to slide and fly out, safety accidents occur, and the sample cutting surface is uneven or slope rework is insufficient. Therefore, in production inspection, the preparation of metallographic samples of small-sized wire rods has become a major bottleneck restricting rapid metallographic inspection.

After searching, China Patent Bulletin No. CN 203811439 U, the patent on 2014.09.03 of the announcement date discloses a metallographic sample cutting machine. It includes a clamping mechanism and a moving mechanism. The moving mechanism includes a lower sliding plate, a middle sliding plate, an upper sliding plate, a transverse screw and a longitudinal screw. The upper end of the lower sliding plate is provided with a dovetail groove guide rail, and a corresponding guide groove is arranged under the middle sliding plate. The transverse screw passes through The threaded hole on the guide block is arranged horizontally on the lower plate, the middle plate is arranged above the lower plate, the upper end of the middle plate is also provided with a dovetail groove guide longitudinally, the lower end of the upper plate is also arranged with a longitudinal guide groove, and the upper plate is arranged above the middle plate, The clamping mechanism is fixed on the upper end face of the upper slide plate. The clamping mechanism includes a left clamp plate and a right clamp plate. The guide plate and the right clamp plate are fixed on the upper slide plate in parallel. There is a hand wheel, and the other end is vertically fixed with a left splint. It is fixed by double splint, but it is easy to interfere and damage the splint during cutting.

SUMMARY OF THE INVENTION

1. The technical problem to be solved by the invention

The purpose of the present invention is to overcome the problems such as unevenness or slope rework of the longitudinal section sample preparation and cutting surface of metallographic samples in the prior art, and it is intended to provide a longitudinal cutting and clamping fixture, an auxiliary fixture and a combined fixture for wire metallographic samples. In its application, by setting the cutting seam, while avoiding damage to the fixture during cutting after clamping-type fixing, the auxiliary fixture also plays a role of stable clamping.

2. Technical solutions

In order to achieve the above object, the technical scheme provided by the invention is:

An auxiliary fixture for longitudinal cutting and clamping of wire metallographic samples of the present invention comprises a spacer block 1 and a spacer block 2 that are connected in a high and low step structure, and a cutting seam 1 through which a grinding wheel sheet can pass is reserved between the two spacer blocks. , When cutting longitudinally, the metallographic sample is placed flat on the cutting seam, and the high and low step structure can form a stable body structure of the metallographic sample, so that the original double clamping surface of the metallographic sample can be increased by another gripping stability.

Further, the width of the first cutting slot is smaller than the diameter of the wire metallographic sample, so as to avoid that the diameter of the wire metallographic sample falls into the first cutting slot due to being too small during cutting.

A longitudinal cutting and clamping fixture for wire metallographic samples, comprising a bottom plate, a first block and a push rod; one end of the bottom plate is lifted upward to form a vertical plate, and the middle of the vertical plate is reserved for a second cutting seam, and the first block is It is slidably connected to the bottom plate, and the push rod is laterally and fixedly connected to the front surface of block one; the wire metallographic sample is clamped between the vertical plate and block one, and at least half of the front surface of the wire metallographic sample is Facing the wheel disc with the remaining front face against the riser. By reserving the second cutting seam, it can effectively avoid damage to the fixture during cutting.

Further, the second block is also included; the push rod transversely passes through the second block and is then fixed on the front surface of the first block to form a double-row serial structure of the second block and the first block, and the second block can be pushed along the second block. The rod slides, and it can also be used when the sample is transversely cut, which improves the versatility and avoids the function of a baffle during cutting and prevents iron chips from splashing around.

Further, the series structure formed by the push rod, the second stopper and the first stopper is two side by side, and the third cutting slot is formed in the middle, which can fix different samples or leaning bodies, and improve the cutting efficiency or clamping stability. .

A combined jig for longitudinally cutting a wire metallographic sample, comprising the above auxiliary jig and a clamping jig, the two pads of the auxiliary jig are in close contact with a vertical plate, and the first cutting seam and the second cutting seam are connected; After the sample is placed flat on the cutting seam 1, its two ends are clamped between the vertical plate and the block 1.

Further, a gasket is also included, which is stacked on the bottom of the two pad blocks of the auxiliary fixture, and is used when the auxiliary fixture is insufficient, so as to improve the versatility.

Furthermore, the upper surface of the cutting pad 2 is provided with a transition slope near the cutting seam, which plays the role of a half-face, prevents the horizontal vibration during cutting, and improves the clamping stability; it is applied to a diameter of 6.5mm. For the metallographic inspection of the following small-sized wires, the smaller the diameter is, the more unstable the clamping is, and the more suitable the combined fixture of this application is.

An application of a longitudinal cutting and clamping fixture for wire metallographic samples, the first block is pushed forward on the upper surface of the bottom plate by a push rod, and the wire metallographic sample is clamped between the vertical plate and the first block , At least half of the front end of the wire metallographic sample faces the grinding wheel sheet, and the rest of the front end face is against the vertical plate, and then the grinding wheel sheet is pushed to the wire metallographic sample, and the wire metallographic sample is cut longitudinally.

An application of a longitudinal cutting composite fixture for wire metallographic samples, the steps are:

S1. Assembly: Assemble the two spacers of the auxiliary fixture against the vertical plate on the bottom plate. After the cutting seam 1 and the cutting seam 2 are kept connected, place the wire metallographic sample flat on the cutting seam 1, and the wire metallographic test The peripheral surface of the sample is close to the step surface of the first block;

S2. Pressing: push the block 1 forward on the upper surface of the bottom plate by the push rod, and clamp the wire metallographic sample between the vertical plate and the block 1, and at least half of the front end surface of the wire metallographic sample Facing the grinding wheel, the remaining front end faces against the vertical plate; at the same time, push another block one forward on the upper surface of the bottom plate through another push rod, and clamp the auxiliary fixture on the vertical plate and the other block one. between;

S3. Cutting: Then push the grinding wheel to the wire metallographic sample, and cut the wire metallographic sample longitudinally.

3. Beneficial effects

Adopting the technical scheme provided by the present invention, compared with the prior art, has the following beneficial effects:

(1) The longitudinal cutting and clamping fixture, auxiliary fixture and combined fixture for wire metallographic samples of the present invention and their application, through the cooperative use of the clamping fixture and the auxiliary fixture, the wire metallographic sample is clamped from the original double The surface clamping is increased to three-sided or even four-sided clamping, which effectively solves the problem that due to the small size of the sample and the few clamping parts, the sample vibration is relatively large during cutting, and the sample is prone to slip and fly out, resulting in safety accidents. Due to the insufficiency of uneven cutting surface or slope rework, during the longitudinal cutting process of the sample, the combined fixture is used to stably support the sample to be cut to ensure that the metallographic sample of small-sized wire rod is stable and does not move during longitudinal cutting, and the processing surface is smooth.

(2) The present invention effectively improves the quality of the preparation of small-sized metallographic samples, the cutting surface is parallel to the longitudinal axis and flat, does not produce a slope, significantly improves the production efficiency, shortens the inspection period significantly, and reduces the labor intensity of workers, It avoids the potential safety hazards caused by fatigue production, thus reduces the false detection and misjudgment caused by the unqualified sample quality, and reduces the production cost. It can be applied in the laboratory for metallographic inspection.

Description of drawings

Fig. 1 is the structural representation of the auxiliary fixture of the present invention;

Fig. 2 is the structural representation of the clamping fixture of the present invention;

3 is a schematic structural diagram of a clamping fixture according to Embodiment 3 of the present invention;

Fig. 4 is the structural representation of the combined fixture of the present invention;

FIG. 5 is a schematic structural diagram of an auxiliary fixture according to Embodiment 5 of the present invention.

In the picture: 1. Auxiliary fixture; 2. Bottom plate; 3. Block 1; 4. Push rod; 5. Block 2; 6. Cutting seam 3; 7. Gasket; 10. Wire metallographic sample; Pad 1; 12. Pad 2; 13. Cutting seam 1; 21. Vertical plate; 22. Cutting seam 2; 50. Grinding wheel sheet; 121. Transition slope. .

Detailed ways

In order to further understand the content of the present invention, the present invention is described in detail with reference to the accompanying drawings.

The present invention will be further described below in conjunction with the examples.

Example 1

The wire metallographic sample longitudinal cutting and clamping auxiliary fixture in this embodiment is used for metallographic sampling of small-sized wires with a diameter of less than 6.5mm, such as wires with a diameter of 6.5mm or a diameter of 5.5mm, as shown in Figure 1, including high and low The stepped structure is connected to the one-piece spacer block 11 and the spacer block two 12, and a cutting seam one 13 through which the grinding wheel sheet 50 can pass is reserved between the two spacer blocks. During longitudinal cutting, the metallographic sample 10 is placed on the cutting seam one. 13, the high and low step structure can form a stable body structure of the metallographic sample 10, so that the original double clamping surface of the metallographic sample 10 can be added with another abutting surface, which improves the clamping stability. The width of the cutting slot one 13 should be smaller than the diameter of the wire metallographic sample 10 to avoid that the diameter of the wire metallographic sample 10 falls into the cutting slot one 13 due to being too small during cutting.

Example 2

The wire metallographic sample longitudinal cutting and clamping fixture in this embodiment, as shown in FIG. 2 , includes a bottom plate 2, a stopper 3 and a push rod 4; A cutting slot 22 is reserved in the middle of the 21, the block one 3 is slidably connected to the bottom plate 2, and the push rod 4 is laterally fixedly connected to the front surface of the block one 3; the wire metallographic sample 10 is clamped Holding between the vertical plate 21 and the stopper 1 3 , at least half of the front end surface of the wire metallographic sample 10 faces the grinding wheel sheet 50 , and the rest of the front end surface abuts on the vertical plate 21 . By reserving the cutting seam II 22, the fixture can be effectively prevented from being damaged during cutting.

Example 3

The longitudinal cutting and clamping fixture for wire metallographic samples in this embodiment is basically the same as that of Embodiment 2, except that, as shown in FIG. 3 , it also includes a second stopper 5 ; It is then fixed on the front surface of block one 3 to form a double-row series structure of block two 5 and block one 3. Block two 5 can slide along the push rod 4, and can also be used when the sample is transversely cut, improving the versatility. It can also avoid the role of a baffle when cutting, and prevent iron chips from splashing around. As shown in Figure 3, the series structure formed by the push rod 4, the second stopper 5 and the stopper one 3 is two side by side, and a cutting slot 36 is formed in the middle, which can fix different samples or leaning bodies and improve the cutting efficiency. or gripping stability.

The application of the wire metallographic sample longitudinal cutting and clamping fixture in this embodiment is to push the stopper 1 3 forward on the upper surface of the bottom plate 2 through the push rod 4, and the wire metallographic sample 10 is clamped on the vertical plate Between 21 and block one 3, at least half of the front end surface of the wire metallographic sample 10 faces the grinding wheel piece 50, and the rest of the front end surface is against the vertical plate 21, and then push the grinding wheel piece 50 to the wire metallographic sample 10. The wire metallographic sample 10 is cut longitudinally.

Example 4

The wire metallographic sample longitudinal cutting combination fixture in this embodiment is used for metallographic sampling of small-sized wires with a diameter of 6.5 mm or less, such as wires with a diameter of 6.5 mm or a diameter of 5.5 mm, as shown in Figure 4, including the sample of Example 1. Auxiliary fixture 1 and the clamping fixture of Example 2 or 3, in the auxiliary fixture 1, the width of the pad block 1 11 and the pad block 2 12 are the same; the width of the pad block 1 11 is smaller than the length of the metallographic sample 10 by 5 mm; The height of the second 12 is less than the height 9 of the first block 11 by 4mm; the width of the cutting slot one 13 is 1.5 times the thickness of the grinding wheel sheet 50; the depth of the cutting slot one 13 is 1/2 of the height of the second pad 12; clamping The length of the auxiliary device 10 is 40mm; the height of the first block 11 and the second block 12 can be adjusted according to the height of the clamping fixture. When the metallographic sample 10 is placed on the second block 12, the height of the sample from the ground is less than that of the cushion Block a height of 11. When in use, the two pads of the auxiliary fixture 1 are in close contact with the vertical plate 21, and the first cutting seam 13 and the second cutting seam 22 are connected; after the wire metallographic sample 10 is placed on the first cutting seam 13, its Both ends are clamped between the vertical plate 21 and the block one 3 .

The application of the wire metallographic sample longitudinal cutting combined fixture of the present embodiment, the steps are:

S1. Assembling: Assemble the two pads of the auxiliary fixture 1 against the vertical plate 21 on the bottom plate 2. After the first cutting seam 13 and the second cutting seam 22 are kept in a connected state, the wire metallographic sample 10 is placed flat on the first cutting seam. 13, the peripheral surface of the wire metallographic sample 10 is close to the stepped surface of the pad one 11;

S2. Compression: push the block one 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 block one 3, and the wire metallographic sample 10 is clamped between the vertical plate 21 and the block one 3. At least half of the front end face of the sample 10 faces the grinding wheel sheet 50, and the remaining front end face is against the vertical plate 21; at the same time, another push rod 4 is used to push another stopper 3 forward on the upper surface of the bottom plate 2, and the auxiliary The clamp 1 is clamped between the vertical plate 21 and another block 3;

S3, cutting: then push the grinding wheel piece 50 to the wire metallographic sample 10 to cut the wire metallographic sample 10 longitudinally.

The combined clamp for longitudinal cutting of wire metallographic samples in this embodiment and its application, through the cooperation of the clamping clamp and the auxiliary clamp 1, the clamping of the wire metallographic sample 10 is improved from the original double-sided clamping to three-sided or even three-sided clamping. Clamping on all sides effectively solves the problem that due to the small size of the sample and the few clamping parts, the sample vibration is relatively large during cutting, and it is easy to cause the sample to slide and fly out, resulting in safety accidents, uneven cutting surface of the sample or slope rework. In the process of longitudinal cutting of the sample, the combination fixture is used to stably support the sample to be cut, so as to ensure that the metallographic sample of small gauge wire is stable and does not move during longitudinal cutting, and the cutting surface is parallel to the longitudinal axis and flat, and no The slope shape significantly improves the production efficiency, shortens the inspection period significantly, reduces the labor intensity of workers, avoids the potential safety hazards caused by fatigue production, thus reduces the false detection and misjudgment caused by the unqualified sample quality, and reduces production. The cost is applicable in the laboratory that performs metallographic examination.

Example 5

The composite jig for longitudinal cutting of wire metallographic samples in this embodiment has the same basic structure as that of Embodiment 4. The difference and improvement is that it is applied to metallographic sampling of small-sized wire rods with a diameter of 6.5 mm or less, such as a diameter of 6.5 mm or a diameter of 5.5 mm. As shown in Figure 5, it also includes a gasket 7, which is stacked on the bottom of the two pad blocks of the auxiliary fixture 1, and is used when the auxiliary fixture 1 is insufficient to improve the versatility. There is a transition slope 121 on the upper surface of the cutting pad block 2 12 near the slit 1 13, which plays the role of a half-face, prevents the horizontal vibration during cutting, and improves the stability of clamping; it is used for diameters below 6.5mm For metallographic inspection of small-sized wires, the smaller the diameter is, the more unstable the clamping is, and the more suitable the combined fixture of this application is.

The present invention and its embodiments have been described above schematically, and the description is not restrictive, and what is shown in the accompanying drawings is only one of the embodiments of the present invention, and the actual structure is not limited thereto. Therefore, if those of ordinary skill in the art are inspired by it, without departing from the purpose of the present invention, any structural modes and embodiments similar to this technical solution are designed without creativity, which shall belong to the protection scope of the present invention. .

Claims (10)

1. A wire metallographic sample longitudinal cutting and clamping auxiliary fixture is characterized in that: comprising a pad block one (11) and a pad block two (12) that are connected in a high and low step structure, and reserved between the two pad blocks There is a cutting slot one (13) through which the grinding wheel piece (50) can pass. 2 . The longitudinal cutting and clamping fixture for wire metallographic samples according to claim 1 , wherein the width of the first cutting slit ( 13 ) is smaller than the diameter of the wire metallographic sample ( 10 ). 3 . 3. A wire metallographic sample longitudinal cutting and clamping fixture, characterized in that: it comprises a bottom plate (2), a block one (3) and a push rod (4); one end of the bottom plate (2) is lifted upwards to be The vertical plate (21), a second cutting slot (22) is reserved in the middle of the vertical plate (21), the first stopper (3) is slidably connected to the bottom plate (2), and the push rod (4) is laterally fixed to the The front surface of the first block (3); the wire metallographic sample (10) is clamped between the vertical plate (21) and the first block (3), and the front surface of the wire metallographic sample (10) is at least One half faces the grinding wheel (50), and the remaining front end faces the vertical plate (21). 4. The wire metallographic sample longitudinal cutting and clamping fixture according to claim 3, characterized in that it further comprises a second stopper (5); after the push rod (4) transversely passes through the second stopper (5) It is then fixed on the front surface of the first stopper (3) to form a series structure of the second stopper (5) and the first stopper (3). 5. The longitudinal cutting and clamping fixture for wire metallographic samples according to claim 4, wherein the series structure formed by the push rod (4), the second stopper (5) and the first stopper (3) is: Two side-by-side with three (6) slits formed in the middle. 6. A combined jig for longitudinal cutting of wire metallographic samples, characterized in that: comprising the auxiliary jig (1) according to claim 1 or 2 and the clamping jig described in any one of claims 3 to 5, the auxiliary jig ( 1) The two spacers are in close contact with 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) After being installed, its two ends are clamped between the vertical plate (21) and the first stopper (3). 7 . The combined jig for longitudinal cutting of wire metallographic samples according to claim 6 , further comprising a gasket ( 7 ), which is stacked on the bottom of the two pad blocks of the auxiliary jig ( 1 ). 8 . 8. The composite fixture for longitudinal cutting of wire metallographic samples according to claim 7, wherein the upper surface of the second cutting pad (12) is provided with a transition slope (121) near the first slit (13). ); used for metallographic inspection of small-sized wires with a diameter of less than 6.5mm. 9. An application of any one of the described wire metallographic specimen longitudinal cutting and clamping fixtures in claims 3 to 5, characterized in that: push the stopper forward on the upper surface of the bottom plate (2) through a push rod (4) One (3), the wire metallographic sample (10) is clamped between the vertical plate (21) and the block one (3), and at least half of the front end surface of the wire metallographic sample (10) faces the grinding wheel ( 50), the remaining front end face is pressed against the vertical plate (21), and then the grinding wheel sheet (50) is pushed to the wire metallographic sample (10), and the wire metallographic sample (10) is cut longitudinally. 10. The application of the longitudinal cutting composite fixture for the wire metallographic sample described in any one of claims 6 to 8, wherein the steps are: S1. Assembly: Assemble the two spacers of the auxiliary fixture (1) against the vertical plate (21) on the bottom plate (2), and after the cutting seam one (13) and the cutting seam two (22) are kept in a connected state, the wire gold The phase sample (10) is placed flat on the cutting seam one (13), and the peripheral surface of the wire metallographic sample (10) is abutted against the stepped surface of the spacer one (11); S2. Pressing: push the block one (3) forward on the upper surface of the bottom plate (2) by the push rod (4), and clamp the wire metallographic sample (10) on the vertical plate (21) and Between the first stopper (3), at least half of the front end surface of the wire metallographic sample (10) faces the grinding wheel (50), and the remaining front end surface abuts on the vertical plate (21); at the same time, through another push rod (4) ) Push another block one (3) forward on the upper surface of the base plate (2), and clamp the auxiliary clamp (1) between the vertical plate (21) and another block one (3); S3. Cutting: the grinding wheel piece (50) is then pushed to the wire metallographic sample (10), and the wire metallographic sample (10) is cut longitudinally.

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