Sample workbench for laser cutting machine

Abstract

The invention provides a sample workbench for a laser cutting machine, which comprises at least two cross beams arranged at intervals, a plurality of first support teeth are distributed on the cross beams, and the first support teeth are matched to form a support area for supporting a sample plate to be cut, and is characterized by further comprising at least two brackets, the bracket is inserted into the cross beam and forms a first bearing area for bearing the cut tensile test sample and / or a second bearing area for bearing the cut hardness test sample, the first bearing area is arranged below the supporting area, and the second bearing area is arranged below the supporting area. Compared with the prior art, the device has the advantages that the bracket and the cross beam are matched to form the first bearing area and the second bearing area which are located below the supporting area, and when a to-be-cut sample plate is cut by a laser cutting machine, a cut tensile test sample falls into the first bearing area, and a cut hardness test sample falls into the second bearing area, so that staggered-layer bearing is realized; and the cut samples can be conveniently collected.

Description

Technical Field

[0001] The invention relates to the field of laser cutting machines, and in particular to a sample workbench for laser cutting machines suitable for the field of laboratory sample preparation. Background Art

[0002] Laser cutting technology is widely used in laser welding, laser hole making, laser engraving, and laser etching industries due to its good cutting accuracy and work efficiency, but it is still rarely used in the sample preparation process of laboratory performance inspection. The main reason is that as a large-scale processing center, the laser cutting machine has a large finished product size in the processing product industry. After laser cutting, the waste automatically falls into the waste hopper below the working area, and the processed finished product remains on the workbench. In the process of laboratory inspection and sample preparation, due to the small size of the test sample, the test sample will fall into the waste hopper after cutting and the waste will remain on the workbench, and then the following problems will arise: First, it is difficult to sort and collect the test sample that falls into the waste hopper; second, after the test sample falls into the waste hopper, other samples will continue to be cut on the workbench, and high-temperature molten materials will splash onto the surface of the test sample to cause slag, and laser cutting sparks will cause the surface of the test sample to burn, etc., which will affect the subsequent test and inspection and cannot meet the inspection requirements.

[0003] In order to solve the above-mentioned problems, the Chinese invention patent with patent number ZL201821267099.1 (authorization announcement number CN208713148U) discloses "Material Support Platform for Laser Cutting Machine", which includes a supporting motherboard horizontally supported on a mounting platform, a plurality of first supporting teeth being provided on the upper surface of the supporting motherboard, and a discharge trough for waste generated by cutting to fall into a waste frame located below the supporting motherboard. A plurality of second tooth plates selected according to the size of the product are detachably inserted on the supporting motherboard, and a plurality of second supporting teeth are provided on the second tooth plate. The second supporting teeth are used to fill between adjacent first supporting teeth and cooperate with the first supporting teeth to support the product to prevent the product from falling from the discharge trough into the waste frame.

[0004] Although the above-mentioned material support platform for laser cutting machine can solve the problem caused by the test sample falling into the waste hopper, it still has the following shortcomings: the first support teeth and the second support teeth are used to support the product. During the laser cutting process, when the cutting route passes through the contact point between the sample and the support tooth tip, the support teeth block the cutting airflow, and the melted sample and table cannot be effectively blown away by the airflow. The sample and the melt of the support tooth tip will remain on the sample, contaminating the sample. Therefore, the existing material support platform for laser cutting machine needs to be improved. Summary of the invention

[0005] The technical problem to be solved by the present invention is to provide a sample workbench for a laser cutting machine that can prevent the test sample from falling into the waste hopper and avoid overheating and melting of the sample, in view of the above-mentioned current situation of the prior art.

[0006] The technical solution adopted by the present invention to solve the above technical problem is as follows: The sample workbench for the laser cutting machine includes at least two cross beams arranged at intervals, and a plurality of first support teeth are distributed on the cross beams. Each of the first support teeth cooperates to form a support area for supporting the template to be cut. It is characterized in that: it further includes at least two brackets, the brackets are inserted on the cross beams and form a first receiving area for receiving the tensile test sample after cutting and / or a second receiving area for receiving the hardness test sample after cutting. The first receiving area is arranged below the support area, and the second receiving area is arranged below the support area.

[0007] The tensile test sample is usually in the shape of a bone. The sizes of the clamping end and the parallel length of the sample are different, and they should be connected by a transition arc. The width w2 of the tensile test sample after cutting mentioned below is the width of the clamping end. In order to enable the first receiving area to receive the tensile test sample after cutting, preferably, the bracket has a concave first recess between two adjacent cross beams. The first recesses of adjacent brackets cooperate to form the first receiving area. The distance d1 between the two brackets forming the first receiving area and the length L1 of the tensile test sample after cutting satisfy: d1 < L1; the width w1 of the first recess and the width w2 of the tensile test sample after cutting satisfy: w1 > w2. Since the concave first recess of the bracket is located between two cross beams and its width w1 is greater than the width w2 of the sample bar after cutting, there is no cross beam or bracket support under the tensile test sample during cutting. Therefore, the following effects are achieved: First, it can prevent overheating and melting products from being generated between the sample and the cross beam or bracket and contaminating the sample; Second, the tensile test sample after cutting can fall downward to the first receiving area, and at the same time, the bottoms of the first recesses of two adjacent brackets respectively support the clamping ends of the tensile test sample after cutting, so that the tensile test sample can be received in the first receiving area, thus facilitating the collection of the tensile test sample after cutting. In addition, the way the bracket is inserted on the cross beam can disassemble the bracket from the cross beam and adjust its insertion position according to the size of the tensile test sample, so as to adapt to the cutting and collection of tensile test samples of different sizes.

[0008] In order to further avoid overburning between the specimen and the crossbeam or the bracket, preferably, the bottom part of the first concave portion bulges upward to form a first boss for supporting the tensile test specimen after cutting, and the width w3 of the first boss and the width w2 of the tensile test specimen after cutting satisfy: w3 < w2. In this way, the tensile test specimen after cutting is supported by the first boss, and the width w3 of the first boss being smaller than the width w2 of the tensile test specimen after cutting can prevent the cutting edge of the tensile test specimen from contacting the bracket, thereby avoiding overburning and contaminating the specimen caused by the contact between the tensile test specimen after cutting and molten metal.

[0009] Preferably, the height difference H1 between the first boss and the first support tooth and the height H2 of the bracket satisfy: 0.3*H2 < H1 < 0.7*H2. If the height difference H1 between the first boss and the first support tooth is too small, the template to be cut will bounce upward under the action of high-pressure gas during laser cutting and touch the laser head to trigger an alarm; if the height difference H1 between the first boss and the first support tooth is too large, it will affect the mechanical properties of the bracket, thereby affecting the overall strength of the workbench and resulting in a decrease in bearing capacity. Therefore, it is limited to 0.3*H2 < H1 < 0.7*H2.

[0010] In order to insert the bracket on the crossbeam, preferably, at least two first slots are provided on the bracket, the first concave portion is located between two adjacent first slots, and a second slot matching with the first slot is provided on the crossbeam.

[0011] Generally, there are no special shape requirements for the hardness test specimen. Usually, when performing a hardness test, the hardness test specimen is cut into a rectangular thin sheet. In order to enable the second receiving area to receive the hardness test specimen after cutting, from the perspective of simple structure, preferably, the bracket has a downward concave second concave portion, and the crossbeam has a downward concave third concave portion. The second concave portion and the third concave portion cooperate to form the second receiving area. Due to the existence of the second concave portion and the third concave portion, there is neither crossbeam support nor bracket support under the hardness test specimen after cutting, thereby avoiding the generation of overburned melt between the specimen and the crossbeam or the bracket and contaminating the specimen. At the same time, after the hardness test specimen is cut, it can fall downward into the second receiving area, and the bottom of the second concave portion can support the hardness test specimen in the width direction of the hardness test specimen, and the bottom of the third concave portion can support the hardness test specimen in the length direction of the hardness test specimen, thereby receiving the hardness test specimen in the second receiving area and facilitating the collection of the hardness test specimen after cutting.

[0012] In order to further prevent the sample from being contaminated by overburned molten material between the sample and the crossbeam or bracket, preferably, the bottom portion of the second recess is convex with a second boss, the bottom portion of the third recess is convex with a third boss, and the second boss and the third boss are plugged together to form a support table for supporting the cut hardness test sample. The cut hardness test sample is supported by the support table to prevent the cut edge of the hardness test sample from contacting the bracket, thereby preventing the cut hardness test sample from contacting the molten metal to cause overburning and contamination of the sample.

[0013] Compared with the prior art, the advantages of the present invention are:

[0014] 1. The sample workbench for the laser cutting machine of the present invention is provided with a bracket on the crossbeam, and the bracket cooperates with the crossbeam to form a first receiving area and a second receiving area located below the supporting area. When the laser cutting machine cuts the sample to be cut, the tensile test sample after cutting falls into the first receiving area, and the hardness test sample after cutting falls into the second receiving area, so as to realize staggered receiving and facilitate the collection of samples after cutting;

[0015] 2. The first supporting teeth of the workbench only support the surroundings of the cutting path, which is conducive to slag removal and will not cause back slag. At the same time, it avoids the generation of molten material to contaminate the sample when the cutting path passes through the contact point between the sample and the tooth tip of the first supporting teeth, ensuring that the sample can meet the subsequent test requirements;

[0016] 3. The workbench has a simple structure. It only needs to insert the bracket on the beam according to the size of the sample. It is easy to assemble and can be periodically self-produced using a laser cutting machine and test waste materials, which is low in cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural schematic diagram of an embodiment of the present invention;

[0018] Figure 2 It is a structural schematic diagram of a crossbeam in an embodiment of the present invention;

[0019] Figure 3 (a)-(c) are schematic diagrams of the structures of three brackets in an embodiment of the present invention;

[0020] Figure 4 This is a schematic diagram of a sample falling onto a workbench in an embodiment of the present invention. DETAILED DESCRIPTION

[0021] The present invention is further described in detail below with reference to the accompanying drawings.

[0022] like Figure 1-4As shown, it is a preferred embodiment of the present invention. The sample workbench for the laser cutting machine of this embodiment includes at least two spaced beams 1 and at least two brackets 2, a plurality of first supporting teeth 11 are distributed on the beam 1, and each first supporting tooth 11 cooperates to form a supporting area for supporting the sample to be cut, and the bracket 2 is inserted on the beam 1 and forms a first receiving area 3 for receiving the tensile test sample A after cutting and / or a second receiving area 4 for receiving the hardness test sample B after cutting, and the first receiving area 3 and the second receiving area 4 are both arranged below the supporting area.

[0023] The bracket 2 of this embodiment includes a first bracket 2a, a second bracket 2b and a third bracket 2c. The first bracket 2a has a first concave portion 21, as shown in FIG3(a); the second bracket 2b has a first concave portion 21 and a second concave portion 24, as shown in FIG3(b); and the third bracket 2c has a second concave portion 24, as shown in FIG3(c).

[0024] The tensile test specimen A is generally bone-shaped. The sizes of the clamping ends and the parallel lengths of the specimen are different, and they should be connected by a transition arc. In order to receive the cut tensile test specimen A, at least two first slots 23 are provided on the bracket 2, and a second slot 12 matching the first slot 23 is provided on the cross beam 1. The first receiving area 3 is formed by two brackets 2 each having a first recess 21 inserted into the cross beam 1 at intervals. The downwardly concave first recesses 21 of the two brackets 2 cooperate to form the first receiving area 3 for receiving the cut tensile test specimen A. Among them, the two brackets 2 with the first recesses 21 can be two first brackets 2a, or one first bracket 2a and one second bracket 2b, or two second brackets 2b. The operator can freely select the combination of the brackets 2 according to actual needs to form the first receiving area 3. It should be noted that when the bracket 2 is inserted into the cross beam 1 to form the first receiving area 3, the first recess 21 needs to be arranged between two adjacent cross beams 1. At the same time, the width w1 of the first recess 21 and the width w2 of the cut tensile test specimen A satisfy: w1>w2. The distance d1 between the two brackets 2 forming the first receiving area 3 and the length L1 of the cut tensile test specimen A satisfy: d1<L1. Since the downwardly concave first recess 21 of the bracket 2 is located between two cross beams 1 and its width w1 is greater than the width w2 of the cut spline, there is no cross beam 1 or bracket 2 supporting below the tensile test specimen A during cutting. The cross beam 1 only supports other areas of the template to be cut, thus having the following effects: First, there is no support tooth supporting below the cutting track, avoiding the phenomenon that the molten matter at the tip of the support tooth remains on the tensile test specimen A and contaminates the specimen in the prior art; Second, the cut tensile test specimen A can fall downward into the first receiving area 3, and at the same time, the bottoms of the first recesses 21 of two adjacent brackets 2 respectively support the clamping ends of the cut tensile test specimen A, so that the tensile test specimen A can be received in the first receiving area 3, thereby realizing the stepped reception of the cut tensile test specimen A. After cutting is completed, the waste is located in the support area and the sample falls into the first receiving area. Only the waste needs to be taken away, and what remains is the tensile test specimen, which is convenient for collection.

[0025] In this embodiment, the hardness test specimen B is a rectangular thin sheet. In order to hold the cut hardness test specimen B, the second receiving area 4 is formed by the cooperation of a bracket 2 with a second concave portion 24 and a cross beam 1. The cross beam 1 has a third concave portion 13. The second concave portion 24 and the third concave portion 13 cooperate to form the second receiving area 4 for holding the cut hardness test specimen B. Among them, the bracket 2 can be a second bracket 2b or a third bracket 2c with the second concave portion 24, or a bracket 2 and a cross beam 1 can be selected to cooperate to form the second receiving area 4, or the second receiving area 4 can also be formed by the cooperation of two or more brackets 2 and the cross beam 1. When the hardness test specimen B falls into the second receiving area 4, the bottom of the second concave portion 24 supports the hardness test specimen B in the width direction of the hardness test specimen B, and the bottom of the third concave portion 13 can support the hardness test specimen B in the length direction of the hardness test specimen B, so as to hold the hardness test specimen B in the second receiving area 4. In order to enable the hardness test specimen B to fall smoothly into the second receiving area 4, the width of the second concave portion 24 is designed to be greater than the width of the hardness test specimen B, and the width of the third concave portion 13 is greater than the length of the hardness test specimen B. In this way, when the hardness test specimen B is cut from the template to be cut, there is neither the cross beam 1 nor the bracket 2 supporting it below. It falls under the action of gravity and is received by the second receiving area 4, so as to realize the stepped reception of the cut hardness test specimen B. After cutting, the waste is located in the support area and the sample falls into the second receiving area. Only the waste needs to be taken away, and what remains is the hardness test specimen, which is convenient for collection. At the same time, there is no support tooth below the cutting track to support, avoiding the phenomenon that the molten matter at the tip of the support tooth in the prior art remains on the hardness test specimen B and pollutes the specimen.

[0026] In order to further avoid the phenomenon of overburning and melting between the specimen and the bracket 2 or the cross beam 1, in this embodiment, a first convex platform 22 that protrudes upward partially is designed at the bottom of the first concave portion 21. The width w3 of the first convex platform 22 and the width w2 of the cut tensile test specimen A satisfy: w3 < w2. The first convex platform 22 is used to support the cut tensile test specimen A to avoid the phenomenon that the cutting edge of the tensile test specimen A contacts the bracket 2 and causes overburning and polluting the specimen. Similarly, a second convex platform 25 protrudes partially at the bottom of the second concave portion 24, and a third convex platform 14 protrudes at the bottom of the third concave portion 13. The second protrusion and the third protrusion are inserted and matched to form a support platform for supporting the cut hardness test specimen B. Among them, the width of the second convex platform 25 is less than the width of the hardness test specimen B, and the width of the third convex platform 14 is less than the length of the hardness test specimen B, so that when the hardness test specimen B falls into it, the support platform can support the central part of the hardness test specimen B without contacting the cutting edge of the hardness test specimen B, thus avoiding the generation of overburning phenomenon.

[0027] In addition, the bracket 2 of this embodiment is provided with second supporting teeth 26 in other areas except the first recess 21, the second recess 24 and the third recess 13. The second supporting teeth 26 can cooperate with the first supporting teeth 11 to support the sample to be cut.

[0028] In this embodiment, the height difference H1 between the first boss 22 and the first supporting tooth 11 and the height H2 of the bracket 2 satisfy: 0.3*H2

[0029] See also Figure 4 As a specific embodiment, the sample workbench for the laser cutting machine of this embodiment adopts a first bracket 2a, a second bracket 2b, and a third bracket 2c, which are respectively inserted on the crossbeam 1 to form a first receiving area 3 and two second receiving areas 4, and can be used to receive the cut tensile test sample A and the cut hardness test sample B respectively. The workbench can realize the rapid sorting and collection of samples during sample preparation, and the efficiency of the sample preparation process can be increased by three times, while the accuracy and surface quality of the samples can be improved.

[0030] It should be noted that in the description of this embodiment, the terms "front, back", "left, right", "inside, outside", "upper, lower" and the like indicating directions or positional relationships are all based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention. The terms "install", "connect", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be a connection between the two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.​

Claims

1. A sample workbench for a laser cutting machine, comprising at least two spaced-apart crossbeams (1), a plurality of first supporting teeth (11) being distributed on the crossbeam (1), each of the first supporting teeth (11) cooperating to form a supporting area for supporting a sample to be cut, characterized in that: It further includes at least two brackets (2), the brackets (2) are inserted on the cross beam (1) and are formed with a first receiving area (3) for receiving the cut tensile test specimen (A) and / or a second receiving area (4) for receiving the cut hardness test specimen (B). The first receiving area (3) is arranged below the support area, and the second receiving area (4) is arranged below the support area.

2. The sample workbench for laser cutting machine according to claim 1, characterized in that: There is a concave first recess (21) between two adjacent cross beams (1) on the bracket (2). The first recesses (21) of adjacent brackets (2) cooperate to form the first receiving area (3). The distance d1 between two brackets (2) forming the first receiving area (3) and the length L1 of the cut tensile test specimen (A) satisfy: d1 < L1; the width w1 of the first recess (21) and the width w2 of the cut tensile test specimen (A) satisfy: w1 > w2.

3. The sample workbench for a laser cutting machine according to claim 2, characterized in that: A bottom part of the first recess (21) protrudes upward to form a first boss (22) for supporting the cut tensile test specimen (A). The width w3 of the first boss (22) and the width w2 of the cut tensile test specimen (A) satisfy: w3 < w2.

4. The sample workbench for a laser cutting machine according to claim 3, characterized in that: The height difference H1 between the first boss (22) and the first support tooth (11) and the height H2 of the bracket (2) satisfy: 0.3*H2 < H1 < 0.7*H2.

5. The sample workbench for a laser cutting machine according to claim 2, characterized in that: At least two first slots (23) are provided on the bracket (2). The first recess (21) is located between two adjacent first slots (23). Second slots (12) matching the first slots (23) are provided on the cross beam (1).

6. The sample workbench for a laser cutting machine according to any one of claims 1 to 5, characterized in that: There is a concave second recess (24) on the bracket (2), and a concave third recess (13) on the cross beam (1). The second recess (24) and the third recess (13) cooperate to form the second receiving area (4).

7. The sample workbench for a laser cutting machine according to claim 6, characterized in that: A bottom part of the second recess (24) protrudes to form a second boss (25), and a bottom of the third recess (13) protrudes to form a third boss (14). The second boss (25) and the third boss (14) are inserted and matched to form a support platform for supporting the cut hardness test specimen (B).

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