CN110160846B - End reinforcement method and device for 3D printing P L A silk strength test - Google Patents

End reinforcement method and device for 3D printing P L A silk strength test Download PDF

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Publication number
CN110160846B
CN110160846B CN201910414438.7A CN201910414438A CN110160846B CN 110160846 B CN110160846 B CN 110160846B CN 201910414438 A CN201910414438 A CN 201910414438A CN 110160846 B CN110160846 B CN 110160846B
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wire
reinforcing sheet
reinforcing
sample
groove
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CN110160846A (en
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屈丹丹
张坤
程天锦
李娇娇
彭青
罗耕星
肖京华
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Institute of Mechanics of CAS
Technology and Engineering Center for Space Utilization of CAS
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Institute of Mechanics of CAS
Technology and Engineering Center for Space Utilization of CAS
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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N1/00—Sampling; Preparing specimens for investigation
    • G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
    • G01N1/286—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q involving mechanical work, e.g. chopping, disintegrating, compacting, homogenising
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N1/00—Sampling; Preparing specimens for investigation
    • G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
    • G01N1/36—Embedding or analogous mounting of samples
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N1/00—Sampling; Preparing specimens for investigation
    • G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
    • G01N1/36—Embedding or analogous mounting of samples
    • G01N2001/366—Moulds; Demoulding

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  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Biochemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
  • Sampling And Sample Adjustment (AREA)

Abstract

The invention discloses an end reinforcing method and device for a 3D printing P L A wire strength test, the method is to prefabricate a reinforcing sheet, a sample wire is arranged at the centroid of the reinforcing sheet, hot melt adhesive is melted and then is printed on two sides of the sample wire, the reinforcing sheet is flattened, the sample wire is taken out after hot melt adhesive is fixed, the reinforcing sheet is fixed at two ends of the P L A wire by the hot melt adhesive, the device comprises a reinforcing sheet die, a telescopic rod and a movable die block, sample wire through grooves are formed in the telescopic rod and the movable die block, a sample wire clamp is arranged at the left end of the movable die block through a clamping groove, the end reinforcing can be carried out on P L A wire materials with various diameters and end surface shapes, the reinforced P L A wire material can be directly clamped by a test clamp, the situations of slipping, local deformation and even breakage of the end of the P L A wire material in the stretching process can be effectively avoided, the test precision of the P L A wire is improved, the test efficiency is high, the test efficiency of the P L A wire strength in various places and environments is high, the applicability, the sample wire and the connection efficiency of the reinforcing sheet is assisted.

Description

End reinforcement method and device for 3D printing P L A silk strength test
Technical Field
The invention relates to the field of 3D printing consumables, in particular to a method and a device for reinforcing an end head of a 3D printing P L A wire strength test.
Background
P L A is one of 3D printing material wires, P L A is biodegradable material and is widely used, 3D printing can print metal, and the forming principle is laser sintering.
The P L A wire is a common 3D printing consumable widely applied, and because the wire is thick and brittle, the strength and modulus of the wire are difficult to measure directly, the existing data usually refer to a block material and cannot accurately reflect the preparation quality of the P L A wire and the influence of the wire on a printed product.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention provides an end reinforcing method and device for a 3D printing P L A wire strength test, which utilize hot melt adhesive to fix reinforcing plates at two ends of a P L A wire, can be used for end reinforcing of P L A wires with various diameters and end surface shapes, can effectively avoid the conditions of slipping, local deformation and even fracture of the end of the P L A wire in the stretching process, thereby improving the test precision of the P L A wire, obtaining accurate strength parameters of the P L A wire, having high test efficiency, being capable of testing the strength of the P L A wire in various places and environments, having wide applicability, being capable of quickly manufacturing the reinforcing plates and assisting the end reinforcement of a sample wire, having multiple functions, improving the efficiency of sample wire end reinforcement, and effectively solving the problems provided by the background technology.
The technical scheme adopted by the invention for solving the technical problems is as follows:
a tip reinforcing method for a 3D printing P L A wire strength test comprises the following steps:
the method comprises the following steps:
step 100, prefabricating a reinforcing sheet, and placing a sample wire at the centroid of the reinforcing sheet;
step 200, melting the hot melt adhesive and then printing the melted hot melt adhesive on two sides of the sample silk;
and step 300, flattening the reinforcing sheet until the reinforcing sheet is hot-melt and gelated to be fixed, and taking down the sample silk with the hot melt adhesive.
Further, the manufacturing method of the reinforcing sheet comprises the following steps: using a sheet of paper of a caliper such as a4, matched reinforcing sheets were prepared according to the loading jig area.
Furthermore, the reinforcing sheet is provided with a clamping part and a non-clamping part, the outer surface of the non-clamping part is a gradually-changed section, and the section area from the clamping part to the non-clamping part of the reinforcing sheet is gradually reduced.
Further, the step 200 further includes: adopt battery drive hot melt rifle to beat the hot melt adhesive in the both sides of appearance silk, the quantity standard of hot melt adhesive is: so that the hot melt adhesive height is comparable to the sample wire diameter.
Further, the reinforcing sheet is flattened by a flattening machine.
In addition, the invention also provides an end reinforcing device for 3D printing P L A wire strength test, which comprises a U-shaped frame, wherein the left end and the right end of the U-shaped frame are respectively provided with a fixed die device and a movable die device, the fixed die device comprises a reinforcing sheet die arranged at the bottom of the left end of the U-shaped frame, the reinforcing sheet die comprises a bottom die and a top stripping die, the top surface of the bottom die is contacted with the bottom surface of the top stripping die, the top end of the left side of the U-shaped frame is provided with an oil cylinder through an installation plate, and the bottom end of the oil cylinder is fixedly connected with the top stripping die;
the movable mould device is arranged on a telescopic rod on the right end of the U-shaped frame, the left end of the telescopic rod is connected with the movable mould, the side face of the movable mould is provided with gradually-changed groove grooves which are consistent with the shapes of the outer sides of the reinforcing sheets, the left end of the telescopic rod and the side portion of the movable mould are provided with sample wire through grooves which are connected with each other, and a sample wire clamp is further arranged inside the left end of the movable mould through a clamping groove.
Further, the movable mould block is matched with the reinforcing sheet mould, the axes of the movable mould block and the reinforcing sheet mould are on the same straight line, the opening of the reinforcing sheet mould faces to the upper right, and the included angle between the axis of the reinforcing sheet mould and the horizontal plane is 30-60 degrees.
Further, the appearance silk anchor clamps are including installing electromagnetism piece and the iron plate on pressing from both sides groove bottom and top, electromagnetism piece top surface is connected with plastics splint, all be equipped with the double-layered hole that is located the appearance silk thread groove outside on the face that plastics splint and iron plate are relative, the iron plate slides from top to bottom and the iron plate top is connected with pressing from both sides the groove top surface through the spring in pressing from both sides inslot portion.
Compared with the prior art, the invention has the beneficial effects that:
(1) the invention fixes the reinforcing sheets at the two ends of the P L A wire by using the hot melt adhesive, can carry out end reinforcement on P L A wires with various diameters and end surface shapes, can adopt various flatteners to manufacture flat reinforcement ends, and the reinforced P L A wires can be directly clamped by the test fixture, thereby being suitable for the test reinforcement of the P L A wires with 100 plus 150mm, and effectively avoiding the conditions of slipping, local deformation and even fracture of the P L A wire ends in the stretching process, thereby improving the test precision of the P L A wires, obtaining accurate strength parameters of the P L A wires, having high test efficiency, being capable of testing in various places and environments and having wide applicability.
(2) The device disclosed by the invention is convenient and quick to manufacture the reinforcing sheet, simple in structure and low in cost, can assist in completing the glue injection connection operation of the reinforcing sheet and the sample wire, has multiple functions, does not need to be taken out after the reinforcing sheet is manufactured, and the sample wire clamp on the movable module clamps the sample wire, so that one end of the sample wire is ensured to be accurately inserted into the centroid of the reinforcing sheet, the effect of calibrating the plumb direction of a P L A wire material is achieved, the precision and the reliability of the subsequent strength test result of the sample wire are improved, the labor and the time are saved, and the efficiency of reinforcing the end head of the sample wire is improved.
Drawings
FIG. 1 is a flow chart of a method for strengthening a tip in a P L A wire strength testing process according to the present invention;
FIG. 2 is a schematic front view of the reinforcing sheet of the present invention;
FIG. 3 is a schematic view of the reinforcement device of the present invention;
FIG. 4 is a schematic front view of a movable module according to the present invention;
fig. 5 is a schematic cross-sectional view of the left end of the movable module of the present invention.
In the figure:
1-a sample wire clamp; 2-a U-shaped frame; 3-fixing the mold device; 4-moving the mould device; 5-reinforcing sheet mould; 6, a telescopic rod; 7-moving the module;
11-an electromagnetic block; 12-iron block; 13-plastic splints; 14-a clamping hole; 15-a spring;
51-bottom die; 52-top stripping; 53-oil cylinder;
71-graded flutes; 72-threading the sample wire into the groove; 73-clip groove.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
As shown in fig. 1, the invention provides a tip reinforcing method and device for 3D printing P L a wire strength test, comprising the following steps:
step 100, prefabricating a reinforcing sheet, and placing a sample wire at the centroid of the reinforcing sheet, wherein the reinforcing sheet has a positioning effect, so that the centroid of a P L A wire passes through the centroid of the reinforcing sheet, the influence of bending of the P L A wire on a measurement result in a measurement process can be avoided, and the effect of calibrating the plumb direction of the P L A wire is achieved, namely the axis of the reinforcing sheet and the axis of the sample wire are on the same straight line, so that the test error caused by different axes can be greatly reduced during measurement, and the accuracy of the sample wire strength test is improved.
And 200, melting the hot melt adhesive, and then printing the molten hot melt adhesive on two sides of the sample wire, wherein the hot melt adhesive can adhere the P L A wire to the centroid of the reinforcing sheet.
And step 300, flattening the reinforcing sheet until the reinforcing sheet is hot-melt and gelated to be fixed, and taking down the sample silk with the hot melt adhesive. The reinforcing sheet finishes the step of flattening through the flattening machine, so that the labor is saved, the flattening efficiency is high, the quality is good, and the hot melt adhesive is prevented from being stained on hands.
The manufacturing method of the reinforcing sheet comprises the following steps: and (3) using a paper sheet with the paper thickness of A4 to avoid the influence of too large thickness on the clamping of the clamp, and preparing a matched gradual-change section reinforcing sheet according to the area of a loading clamp.
As shown in fig. 2, the front shape of the reinforcing sheet is shown, in which a is the reinforcing sheet, b is the clamped portion of the reinforcing sheet, c is the unclamped portion of the reinforcing sheet, and d is the tapered cross section of the reinforcing sheet. Be equipped with clamping part and non-clamping part on the reinforcing sheet, the non-clamping part of reinforcing sheet is the gradual change cross-section, and the cross sectional area from clamping part to non-clamping part diminishes gradually, avoids the appearance silk fracture that clamping-force induced to the intact harmless of reinforcing sheet and appearance silk has been guaranteed.
It should be noted that, before the reinforcing sheet is not flattened, the opening area of the non-clamping portion is larger than that of the clamping portion, so that the hot melt adhesive can be conveniently injected into the reinforcing sheet. And when the flatting mill was flattening, the clamping part of reinforcing piece was pressed to the wantonly, thereby protect the clamping part shape of reinforcing piece, thereby it is tight to make the clamping part change by appearance silk test fixture clamp, so the flatting mill flattens the non-clamping part of reinforcing piece also be the partly of gradual change cross-section, because there is the gradual change cross-section, consequently, can not make the reinforcing piece split when flattening, the quality of reinforcing piece has been guaranteed, and the non-clamping part open area of the reinforcing piece after flattening is little than the open area of clamping part, the great part of hot melt adhesive terminal surface is inside the space of clamping part and can not come out automatically like this, protect the hot melt adhesive inside the reinforcing piece, thereby the stability that reinforcing piece and appearance silk are connected has been guaranteed.
The end surface shape of the end reinforcement of the P L A wire is consistent with the end surface shape of the clamping space of the P L A wire clamp, so that when the reinforcing sheet is clamped by the P L A wire clamp, the contact area between the clamping surface of the clamp and the reinforcing sheet is larger, the clamping force is firmer, the P L A wire sliding phenomenon cannot occur during testing, and the accuracy of the testing result is improved.
The dosage standard of the hot melt adhesive is as follows: so that the hot melt adhesive height is comparable to the sample wire diameter. The hot melt adhesive can be effectively prevented from being excessively filled, so that the hot melt adhesive is excessively extruded when the hot melt adhesive is flattened, and the volume of the reinforcing strip is too large, so that the clamping effect of the clamp is not facilitated. The hot melt adhesive does not produce volatile substances in the heating process, is safe and environment-friendly, and is suitable for on-orbit operation in closed narrow space environments such as space stations and the like.
Step 200 further comprises: and (4) driving a hot melting gun by a battery to apply hot melt adhesive to two sides of the sample wire. The battery-powered hot melting gun can be conveniently used in various places, such as outdoors and places without sockets, and is convenient and quick.
Preferably, the end reinforcing method of the P L A wire material fixes the reinforcing sheets at two ends of the P L A wire by using hot melt adhesive, can perform end reinforcing on P L A wire materials with various diameters and end surface shapes, can manufacture flat reinforcing ends by using various flatteners, and the reinforced P L A wire material can be directly clamped by a test fixture, so that the method is suitable for testing and reinforcing the P L A wire with the diameter of 100 plus 150mm, and can effectively avoid the conditions of slipping, local deformation and even fracture of the end of the P L A wire material in the stretching process, thereby improving the testing precision of the P L A wire, obtaining accurate strength parameters of the P L A wire, having high testing efficiency, testing the strength of the P L A wire in various places and environments and having wide applicability.
As shown in FIG. 3, the invention also provides an end reinforcement device for 3D printing P L A wire strength test, which comprises a U-shaped frame 2, wherein the left end and the right end of the U-shaped frame 2 are respectively provided with a fixed die device 3 and a movable die device 4, the fixed die device 3 comprises a reinforcing sheet die 5 arranged at the bottom of the left end of the U-shaped frame 1, the reinforcing sheet die 5 comprises a bottom die 51 and a top stripping die 52, the top surface of the bottom die 51 is contacted with the bottom surface of the top stripping die 52, the top end of the left side of the U-shaped frame 2 is provided with an oil cylinder 53 through a mounting plate, and the bottom end of the oil cylinder 53 is fixedly connected with the top stripping die 52.
The movable mould device 4 is installed at the telescopic link 6 on 2 right-hand members of U-shaped frame, and telescopic link 6 can be electric drive or manpower drive, need add the controller in the time of electric drive to the flexible stroke of accurate control telescopic link 6, thereby it is more convenient to guarantee the silk injecting glue of appearance. The left end of the shrinkage rod 6 is connected with a movable mould block 7, the side surface of the movable mould block 7 is provided with a gradual-change groove 71 which is consistent with the outer side shape of the reinforcing sheet, the overall shape of the gradual-change groove 71 is consistent with the shape of a gradual-change section of the reinforcing sheet, and the gradual-change groove 71 is also arranged inside the reinforcing sheet mould 5 so as to interact with the movable mould block 7 to manufacture the gradual-change section of the reinforcing sheet. The left end of the movable module 7 is in a round rod shape, and the right end of the movable module is similar to the conical gear in shape and is provided with triangular stripes and triangular grooves so as to conveniently manufacture the gradual change section of the reinforcing sheet.
The process of manufacturing the reinforcing sheet by adopting the device of the invention is as follows:
the method comprises the steps of firstly manufacturing a reinforcing sheet base material, namely, mutually bonding a cylindrical paper sheet with a bottom cover and a circular truncated cone-shaped paper sheet, wherein a paper sheet cover is arranged at the left end of the cylindrical paper sheet, the right end of the circular truncated cone-shaped paper sheet is uncovered, and the opening area of the right end of the circular truncated cone-shaped paper sheet is larger than that of the cylindrical paper sheet. Then, the reinforcing sheet base material is placed inside the reinforcing sheet mold 5, and the bottom mold 51 and the top release mold 52 are attached to each other. Starting the telescopic rod 6 to enable the movable mould block 7 to be inserted into the mould cavity inside the reinforcing sheet mould 5, compressing the reinforcing sheet base material, and processing the reinforcing sheet with the gradually-changed section under the action of pressure.
The left end of the telescopic rod 6 and the side part of the movable mould 7 are both provided with sample wire through grooves 72 which are connected with each other, the side surfaces of the sample wire through grooves 72 penetrate out from the outer side surfaces of the telescopic rod 6 and the movable mould 7, the sample wire through grooves 72 are communicated with the clamping grooves 73 and are positioned between the two clamping holes 14 of the plastic clamping plate 13 and the iron block 12, and the bottom surfaces of the sample wire through grooves 72 are parallel to the bottom surface of the iron block 12. Therefore, both ends of the sample wire are connected with the reinforcing sheet, the sample wire can be easily pulled out from the sample wire penetrating groove 72, and the connection strength of the reinforcing sheet and the sample wire is ensured. The sample silk threading groove 72 is in a rectangular plate shape, the length of the sample silk threading groove 72 is at least 10-15cm, and the sample silk needs to turn in the telescopic rod 6, so the sample silk threading groove 72 with enough length can provide the sample silk with enough turning distance, and the sample silk is prevented from being broken due to the fact that the turning distance is too short.
The movable mould block 7 is matched with the reinforcing sheet mould 5, the movable mould block 7 and the axis of the reinforcing sheet mould 5 are on the same straight line, the opening of the reinforcing sheet mould 5 faces to the upper right, and the included angle between the axis of the reinforcing sheet mould 5 and the horizontal plane is 30-60 degrees, so that the subsequent glue injection operation of the reinforcing sheet is more convenient, and the outflow and the waste pollution of thermal gel are reduced.
As shown in fig. 4 and 5, the sample wire holder 1 is further mounted inside the left end of the movable module 7 through a holder groove 73. The sample wire clamp 1 comprises an electromagnetic block 11 and an iron block 12 which are arranged at the bottom end and the top end of a clamping groove 73, the top surface of the electromagnetic block 11 is connected with a plastic clamping plate 13, and the plastic clamping plate 13 avoids direct contact abrasion between the electromagnetic block 11 and the iron block 12 and also avoids electric leakage. The opposite surfaces of the plastic clamping plate 13 and the iron block 12 are provided with clamping holes 14 positioned outside the sample wire through groove 72, and the outer diameter of each clamping hole 14 is 0.1-0.3mm smaller than the outer diameter of the sample wire, so that the sample wire can be clamped. When the two clamping holes 14 are combined together, the common axis of the two clamping holes is on the same straight line with the axis of the movable mould block 7 and the axis of the reinforcing sheet mould 5, so that the sample wire can be stably inserted into the centroid of the reinforcing sheet.
The iron block 12 slides up and down in the clamping groove 73, and the top end of the iron block 12 is connected with the top surface of the clamping groove 73 through a spring 15. When the electromagnetic block 11 is not electrified, the iron block 12 is not in contact with the plastic clamping plate 13 under the elastic tension of the spring 15, and only when the electromagnetic block 11 is electrified to attract the iron block 12, the iron block 12 descends to be tightly attached to the plastic clamping plate 13 to clamp the sample wire.
The sample silk gluing method by using the device comprises the following steps:
(1) after the reinforcing sheet is manufactured by the reinforcing sheet die 5, the reinforcing sheet does not need to be taken out immediately, the telescopic rod 6 is started to contract to enable the motor module 7 to be far away from the reinforcing sheet die 5, the sample wire is inserted from the sample wire through groove 72, one end of the sample wire is arranged in the fast control 14, then the electromagnetic block 11 is electrified to attract the iron block 12 to clamp the sample wire, the left end of the sample wire is arranged in the clamping hole 14, and the axis of the sample wire penetrates through the centroid of the reinforcing sheet.
(2) The telescopic rod 6 is started to enable the movable mould 7 to be close to the reinforcing sheet mould 7 but not to be inserted into the reinforcing sheet mould 5, so that the sample wires are inserted into the reinforcing sheet centroid, and a glue injection channel is reserved between the movable mould 7 and the reinforcing sheet mould 5. And then injecting hot melt adhesive into the two sides of the sample wire from the right end opening of the reinforcing sheet by using a hot melt gun, and stopping injecting the adhesive after the injection thickness of the hot melt adhesive is consistent with the diameter of the sample wire.
(3) And starting the oil cylinder 53 to separate the top stripping die 52 from the bottom die 51, completing the die stripping, enabling the sample wire clamp 1 to loosen the sample wire, pulling the sample wire out of the sample wire through groove 72, taking the reinforcing sheet out of the bottom die 51, and immediately flattening the reinforcing sheet. After the flattening is completed, the other end of the sample thread is also subjected to the bonding operation of the sample thread, the reinforcing sheet and the hot melt adhesive as described above.
Preferably, the reinforcing sheet manufacturing device disclosed by the invention is convenient and quick to manufacture the reinforcing sheet, simple in structure and low in cost, can assist in completing the glue injection connection operation of the reinforcing sheet and the sample wire, has multiple functions, and is not required to be taken out after the manufacturing of the reinforcing sheet is completed, the sample wire clamp 11 on the movable module 7 clamps the sample wire, so that one end of the sample wire is accurately inserted into the centroid of the reinforcing sheet, the effect of calibrating the plumb direction of a P L A wire material is realized, the precision and the reliability of subsequent strength test results of the sample wire are improved, the labor and the time are saved, and the efficiency of reinforcing the end head of the sample wire is improved.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Claims (3)

1. The utility model provides an end reinforcing apparatus of powerful test of 3D printing P L A silk, its characterized in that, includes U-shaped frame (2), cover half device (3) and movable mould device (4) are installed respectively to the left end and the right-hand member of U-shaped frame (2), cover half device (3) are including installing enhancement piece mould (5) in U-shaped frame (2) left end bottom, it includes die block (51) and top form removal (52) to strengthen piece mould (5), the top surface of die block (51) contacts with the bottom surface of top form removal (52), hydro-cylinder (53) are installed through the mounting panel to the left side top of U-shaped frame (2), hydro-cylinder (53) bottom and top form removal (52) fixed connection;
the utility model discloses a novel wire drawing device, including U-shaped frame (2), movable mould device (4), movable mould device (7), the left end of movable mould device (6) is connected and is moved module (7), the side of moving module (7) is equipped with gradual change flute groove (71) unanimous with reinforcement piece outside shape, the left end of telescopic link (6) and the lateral part of moving module (7) all are equipped with interconnect's appearance silk and wear groove (72), move the left end of module (7) inside still install appearance silk anchor clamps (1) through pressing from both sides groove (73).
2. The end reinforcing device for the 3D printing P L A wire strength test according to claim 1, wherein the movable module (7) is matched with the reinforcing sheet die (5), the axes of the movable module (7) and the reinforcing sheet die (5) are on the same straight line, the opening of the reinforcing sheet die (5) faces to the upper right, and the included angle between the axis of the reinforcing sheet die (5) and the horizontal plane is 30-60 degrees.
3. The end reinforcing device for the 3D printing P L A wire strength test according to claim 1, wherein the sample wire clamp (1) comprises an electromagnetic block (11) and an iron block (12) which are installed at the bottom end and the top end of a clamp groove (73), the top surface of the electromagnetic block (11) is connected with a plastic clamp plate (13) of the movable module (7), clamp holes (14) located on the outer side of a sample wire through groove (72) in the movable module (7) are formed in opposite surfaces of the plastic clamp plate (13) and the iron block (12), the iron block (12) slides up and down in the clamp groove (73), and the top end of the iron block (12) is connected with the top surface of the clamp groove (73) through a spring (15).
CN201910414438.7A 2019-05-17 2019-05-17 End reinforcement method and device for 3D printing P L A silk strength test Active CN110160846B (en)

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