CN110016623A - A kind of novel high-strength rotary cutter edge - Google Patents
A kind of novel high-strength rotary cutter edge Download PDFInfo
- Publication number
- CN110016623A CN110016623A CN201910405751.4A CN201910405751A CN110016623A CN 110016623 A CN110016623 A CN 110016623A CN 201910405751 A CN201910405751 A CN 201910405751A CN 110016623 A CN110016623 A CN 110016623A
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- China
- Prior art keywords
- parts
- blade
- rotary cutter
- circular cylinder
- cutter edge
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23D—PLANING; SLOTTING; SHEARING; BROACHING; SAWING; FILING; SCRAPING; LIKE OPERATIONS FOR WORKING METAL BY REMOVING MATERIAL, NOT OTHERWISE PROVIDED FOR
- B23D35/00—Tools for shearing machines or shearing devices; Holders or chucks for shearing tools
- B23D35/001—Tools for shearing machines or shearing devices; Holders or chucks for shearing tools cutting members
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C37/00—Cast-iron alloys
- C22C37/06—Cast-iron alloys containing chromium
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C37/00—Cast-iron alloys
- C22C37/10—Cast-iron alloys containing aluminium or silicon
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/22—Ferrous alloys, e.g. steel alloys containing chromium with molybdenum or tungsten
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/24—Ferrous alloys, e.g. steel alloys containing chromium with vanadium
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/26—Ferrous alloys, e.g. steel alloys containing chromium with niobium or tantalum
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/28—Ferrous alloys, e.g. steel alloys containing chromium with titanium or zirconium
Abstract
The present invention provides a kind of novel high-strength rotary cutter edge, is related to a kind of machining equipment technical field.The invention is prepared by the raw material comprising following weight parts: C:1-5 parts, V:0.5-1 parts, and W:1-5 parts, Cr:10-15 parts, Mo:10-15 parts, Si:1-5 parts, Ti:1-5 parts, Nb:0.1-0.5 parts, Zr:0.5-1 parts, surplus Fe.The present invention can significantly increase the hardness and wearability of material, and have certain lubricating action to contact surface, solve the wear phenomenon that rotary cutter edge is easy to appear at work, to extend the duty cycle of rotary cutter edge.
Description
Technical field
The present invention relates to a kind of machining equipment technical fields, more particularly to a kind of novel high-strength rotary cutter edge.
Background technique
Rotary cutter edge is the main tool of shearing, and during shearing, the requirement to notch is very stringent, currently, circle
What disk cutting edge used is all common steel, and therefore, during production and application, rotary cutter edge section is easy to appear showing for abrasion
As.
Summary of the invention
Aiming at the shortcomings existing in the above problems, the present invention provides a kind of novel high-strength rotary cutter edge, can
The enough hardness and wearability for significantly increasing material, and have certain lubricating action to contact surface, solve rotary cutter edge
The wear phenomenon being easy to appear at work, to extend the duty cycle of rotary cutter edge.
To solve the above-mentioned problems, the present invention provides a kind of novel high-strength rotary cutter edge, wherein by including following weight
The raw material of part is prepared: C:1-5 parts, V:0.5-1 parts, and W:1-5 parts, Cr:10-15 parts, Mo:10-15 parts, Si:1-5 parts, Ti:
1-5 parts, Nb:0.1-0.5 parts, Zr:0.5-1 parts, surplus Fe.
Preferably, it is prepared by the raw material comprising following weight parts: C:1 parts, V:0.5 parts, W:1 parts, Cr:10 parts, Mo:
10 parts, Si:1 parts, Ti:1 parts, Nb:0.1 parts, Zr:0.5 parts, surplus Fe.
Preferably, it is prepared by the raw material comprising following weight parts: C:2 parts, V:0.6 parts, W:2 parts, Cr:12 parts, Mo:
12 parts, Si:2 parts, Ti:2 parts, Nb:0.2 parts, Zr:0.6 parts, surplus Fe.
Preferably, it is prepared by the raw material comprising following weight parts: C:3 parts, V:0.7 parts, W:3 parts, Cr:13 parts, Mo:
13 parts, Si:3 parts, Ti:3 parts, Nb:0.3 parts, Zr:0.7 parts, surplus Fe.
Preferably, it is prepared by the raw material comprising following weight parts: C:4 parts, V:0.8 parts, W:4 parts, Cr:14 parts, Mo:
14 parts, Si:4 parts, Ti:4 parts, Nb:0.4 parts, Zr:0.8 parts, surplus Fe.
Preferably, it is prepared by the raw material comprising following weight parts: C:5 parts, V:1 parts, W:5 parts, Cr:15 parts, Mo:15
Part, Si:5 parts, Ti:5 parts, Nb:0.5 parts, Zr:1 parts, surplus Fe.
Compared with prior art, the invention has the following advantages that
The present invention can significantly increase the hardness and wearability of material, and have certain lubrication to make contact surface
With solving the wear phenomenon that rotary cutter edge is easy to appear at work, to extend the duty cycle of rotary cutter edge.
Specific embodiment
In order to make the objectives, technical solutions, and advantages of the present invention clearer, the present invention is made below with reference to example
It is further described, but example is not as a limitation of the invention.
Embodiment 1
A kind of novel high-strength rotary cutter edge is prepared by the raw material comprising following weight parts: C:1 parts, V:0.5 parts, and W:
1 part, Cr:10 parts, Mo:10 parts, Si:1 parts, Ti:1 parts, Nb:0.1 parts, Zr:0.5 parts, surplus Fe.
A kind of preparation method of novel high-strength rotary cutter edge, wherein include the following steps:
S10, blade base is prepared, and coats blade jacket outside the blade base:
The blade base is annular cake body, and the fitted key of installation positioning is provided on the inner sidewall of the annular cake body
Slot；The blade jacket includes circular cylinder, and the outer diameter of the inner sidewall of the circular cylinder is equal to the internal diameter of the blade base, and
In the inner hole of the blade base；The internal diameter of the lateral wall of the circular cylinder is greater than the outer diameter of the blade base, and
It is wrapped in around the lateral wall of the blade base；The lower port of the circular cylinder is equipped with the lower ring for closing the lower port
Shape cover board is provided with lower annular card convex on the inner wall of the lower ring cover, and the lower annular card convex is close to the circular cylinder
Lateral wall and be buckled between the lateral wall of the circular cylinder and the blade base；The upper port of the circular cylinder is matched
Equipped with the upper ring cover for closing the upper port, annular card convex is provided on the inner wall of the upper ring cover, and on this
Annular card convex close to the circular cylinder lateral wall and be buckled in the circular cylinder lateral wall and the blade base it
Between；It is provided at the outer rim in the upper ring cover and is connected to blade jacket inner cavity through the upper annular card convex
Powder channel is filled, which is equipped with top cover away from the top of the circular cylinder, and is provided on the top cover and vacuumizes hole；
S20, pass through the dress powder channel filling alloy powder into the blade jacket, carry out jolt ramming after filling is completed
Operation, and the top cover is installed to the dress powder channel roof and is connected by welded seal；
S30, it the blade jacket for being built-in with the blade base and the alloy powder is placed in degasification furnace vacuumizes simultaneously
It is de-gassed heat preservation；
S40, deaerate heat preservation after the completion of, the blade jacket for being built-in with the blade base and the alloy powder is placed in
Hip treatment is carried out in hot isostatic pressing furnace, make the alloy powder in the blade jacket hip moulding and with institute
The lateral wall diffusion connection for stating blade base, forms the blade layer of blade on the lateral wall of the blade base；
S50, remove the blade jacket using machine-tooled method and obtain blade blank, and to the blade blank successively into
Row annealing, quenching treatment and tempering, then the blade blank is finished to obtain blade.
Embodiment 2
A kind of novel high-strength rotary cutter edge is prepared by the raw material comprising following weight parts: C:2 parts, V:0.6 parts, and W:
2 parts, Cr:12 parts, Mo:12 parts, Si:2 parts, Ti:2 parts, Nb:0.2 parts, Zr:0.6 parts, surplus Fe.
A kind of preparation method of novel high-strength rotary cutter edge, wherein include the following steps:
S10, blade base is prepared, and coats blade jacket outside the blade base:
The blade base is annular cake body, and the fitted key of installation positioning is provided on the inner sidewall of the annular cake body
Slot；The blade jacket includes circular cylinder, and the outer diameter of the inner sidewall of the circular cylinder is equal to the internal diameter of the blade base, and
In the inner hole of the blade base；The internal diameter of the lateral wall of the circular cylinder is greater than the outer diameter of the blade base, and
It is wrapped in around the lateral wall of the blade base；The lower port of the circular cylinder is equipped with the lower ring for closing the lower port
Shape cover board is provided with lower annular card convex on the inner wall of the lower ring cover, and the lower annular card convex is close to the circular cylinder
Lateral wall and be buckled between the lateral wall of the circular cylinder and the blade base；The upper port of the circular cylinder is matched
Equipped with the upper ring cover for closing the upper port, annular card convex is provided on the inner wall of the upper ring cover, and on this
Annular card convex close to the circular cylinder lateral wall and be buckled in the circular cylinder lateral wall and the blade base it
Between；It is provided at the outer rim in the upper ring cover and is connected to blade jacket inner cavity through the upper annular card convex
Powder channel is filled, which is equipped with top cover away from the top of the circular cylinder, and is provided on the top cover and vacuumizes hole；
S20, pass through the dress powder channel filling alloy powder into the blade jacket, carry out jolt ramming after filling is completed
Operation, and the top cover is installed to the dress powder channel roof and is connected by welded seal；
S30, it the blade jacket for being built-in with the blade base and the alloy powder is placed in degasification furnace vacuumizes simultaneously
It is de-gassed heat preservation；
S40, deaerate heat preservation after the completion of, the blade jacket for being built-in with the blade base and the alloy powder is placed in
Hip treatment is carried out in hot isostatic pressing furnace, make the alloy powder in the blade jacket hip moulding and with institute
The lateral wall diffusion connection for stating blade base, forms the blade layer of blade on the lateral wall of the blade base；
S50, remove the blade jacket using machine-tooled method and obtain blade blank, and to the blade blank successively into
Row annealing, quenching treatment and tempering, then the blade blank is finished to obtain blade.
Embodiment 3
A kind of novel high-strength rotary cutter edge is prepared by the raw material comprising following weight parts: C:3 parts, V:0.7 parts, and W:
3 parts, Cr:13 parts, Mo:13 parts, Si:3 parts, Ti:3 parts, Nb:0.3 parts, Zr:0.7 parts, surplus Fe.
A kind of preparation method of novel high-strength rotary cutter edge, wherein include the following steps:
S10, blade base is prepared, and coats blade jacket outside the blade base:
The blade base is annular cake body, and the fitted key of installation positioning is provided on the inner sidewall of the annular cake body
Slot；The blade jacket includes circular cylinder, and the outer diameter of the inner sidewall of the circular cylinder is equal to the internal diameter of the blade base, and
In the inner hole of the blade base；The internal diameter of the lateral wall of the circular cylinder is greater than the outer diameter of the blade base, and
It is wrapped in around the lateral wall of the blade base；The lower port of the circular cylinder is equipped with the lower ring for closing the lower port
Shape cover board is provided with lower annular card convex on the inner wall of the lower ring cover, and the lower annular card convex is close to the circular cylinder
Lateral wall and be buckled between the lateral wall of the circular cylinder and the blade base；The upper port of the circular cylinder is matched
Equipped with the upper ring cover for closing the upper port, annular card convex is provided on the inner wall of the upper ring cover, and on this
Annular card convex close to the circular cylinder lateral wall and be buckled in the circular cylinder lateral wall and the blade base it
Between；It is provided at the outer rim in the upper ring cover and is connected to blade jacket inner cavity through the upper annular card convex
Powder channel is filled, which is equipped with top cover away from the top of the circular cylinder, and is provided on the top cover and vacuumizes hole；
S20, pass through the dress powder channel filling alloy powder into the blade jacket, carry out jolt ramming after filling is completed
Operation, and the top cover is installed to the dress powder channel roof and is connected by welded seal；
S30, it the blade jacket for being built-in with the blade base and the alloy powder is placed in degasification furnace vacuumizes simultaneously
It is de-gassed heat preservation；
S40, deaerate heat preservation after the completion of, the blade jacket for being built-in with the blade base and the alloy powder is placed in
Hip treatment is carried out in hot isostatic pressing furnace, make the alloy powder in the blade jacket hip moulding and with institute
The lateral wall diffusion connection for stating blade base, forms the blade layer of blade on the lateral wall of the blade base；
S50, remove the blade jacket using machine-tooled method and obtain blade blank, and to the blade blank successively into
Row annealing, quenching treatment and tempering, then the blade blank is finished to obtain blade.
Embodiment 4
A kind of novel high-strength rotary cutter edge is prepared by the raw material comprising following weight parts: C:4 parts, V:0.8 parts, and W:
4 parts, Cr:14 parts, Mo:14 parts, Si:4 parts, Ti:4 parts, Nb:0.4 parts, Zr:0.8 parts, surplus Fe.
A kind of preparation method of novel high-strength rotary cutter edge, wherein include the following steps:
S10, blade base is prepared, and coats blade jacket outside the blade base:
The blade base is annular cake body, and the fitted key of installation positioning is provided on the inner sidewall of the annular cake body
Slot；The blade jacket includes circular cylinder, and the outer diameter of the inner sidewall of the circular cylinder is equal to the internal diameter of the blade base, and
In the inner hole of the blade base；The internal diameter of the lateral wall of the circular cylinder is greater than the outer diameter of the blade base, and
It is wrapped in around the lateral wall of the blade base；The lower port of the circular cylinder is equipped with the lower ring for closing the lower port
Shape cover board is provided with lower annular card convex on the inner wall of the lower ring cover, and the lower annular card convex is close to the circular cylinder
Lateral wall and be buckled between the lateral wall of the circular cylinder and the blade base；The upper port of the circular cylinder is matched
Equipped with the upper ring cover for closing the upper port, annular card convex is provided on the inner wall of the upper ring cover, and on this
Annular card convex close to the circular cylinder lateral wall and be buckled in the circular cylinder lateral wall and the blade base it
Between；It is provided at the outer rim in the upper ring cover and is connected to blade jacket inner cavity through the upper annular card convex
Powder channel is filled, which is equipped with top cover away from the top of the circular cylinder, and is provided on the top cover and vacuumizes hole；
S20, pass through the dress powder channel filling alloy powder into the blade jacket, carry out jolt ramming after filling is completed
Operation, and the top cover is installed to the dress powder channel roof and is connected by welded seal；
S30, it the blade jacket for being built-in with the blade base and the alloy powder is placed in degasification furnace vacuumizes simultaneously
It is de-gassed heat preservation；
S40, deaerate heat preservation after the completion of, the blade jacket for being built-in with the blade base and the alloy powder is placed in
Hip treatment is carried out in hot isostatic pressing furnace, make the alloy powder in the blade jacket hip moulding and with institute
The lateral wall diffusion connection for stating blade base, forms the blade layer of blade on the lateral wall of the blade base；
S50, remove the blade jacket using machine-tooled method and obtain blade blank, and to the blade blank successively into
Row annealing, quenching treatment and tempering, then the blade blank is finished to obtain blade.
Embodiment 5
A kind of novel high-strength rotary cutter edge is prepared by the raw material comprising following weight parts: C:5 parts, V:1 parts, and W:5
Part, Cr:15 parts, Mo:15 parts, Si:5 parts, Ti:5 parts, Nb:0.5 parts, Zr:1 parts, surplus Fe.
A kind of preparation method of novel high-strength rotary cutter edge, wherein include the following steps:
S10, blade base is prepared, and coats blade jacket outside the blade base:
The blade base is annular cake body, and the fitted key of installation positioning is provided on the inner sidewall of the annular cake body
Slot；The blade jacket includes circular cylinder, and the outer diameter of the inner sidewall of the circular cylinder is equal to the internal diameter of the blade base, and
In the inner hole of the blade base；The internal diameter of the lateral wall of the circular cylinder is greater than the outer diameter of the blade base, and
It is wrapped in around the lateral wall of the blade base；The lower port of the circular cylinder is equipped with the lower ring for closing the lower port
Shape cover board is provided with lower annular card convex on the inner wall of the lower ring cover, and the lower annular card convex is close to the circular cylinder
Lateral wall and be buckled between the lateral wall of the circular cylinder and the blade base；The upper port of the circular cylinder is matched
Equipped with the upper ring cover for closing the upper port, annular card convex is provided on the inner wall of the upper ring cover, and on this
Annular card convex close to the circular cylinder lateral wall and be buckled in the circular cylinder lateral wall and the blade base it
Between；It is provided at the outer rim in the upper ring cover and is connected to blade jacket inner cavity through the upper annular card convex
Powder channel is filled, which is equipped with top cover away from the top of the circular cylinder, and is provided on the top cover and vacuumizes hole；
S20, pass through the dress powder channel filling alloy powder into the blade jacket, carry out jolt ramming after filling is completed
Operation, and the top cover is installed to the dress powder channel roof and is connected by welded seal；
S30, it the blade jacket for being built-in with the blade base and the alloy powder is placed in degasification furnace vacuumizes simultaneously
It is de-gassed heat preservation；
S40, deaerate heat preservation after the completion of, the blade jacket for being built-in with the blade base and the alloy powder is placed in
Hip treatment is carried out in hot isostatic pressing furnace, make the alloy powder in the blade jacket hip moulding and with institute
The lateral wall diffusion connection for stating blade base, forms the blade layer of blade on the lateral wall of the blade base；
S50, remove the blade jacket using machine-tooled method and obtain blade blank, and to the blade blank successively into
Row annealing, quenching treatment and tempering, then the blade blank is finished to obtain blade.
The foregoing description of the disclosed embodiments enables those skilled in the art to implement or use the present invention.
Various modifications to these embodiments will be readily apparent to those skilled in the art, as defined herein
General Principle can be realized in other embodiments without departing from the spirit or scope of the present invention.Therefore, of the invention
It is not intended to be limited to the embodiments shown herein, and is to fit to and the principles and novel features disclosed herein phase one
The widest scope of cause.
Claims (6)
1. a kind of novel high-strength rotary cutter edge, which is characterized in that be prepared by the raw material comprising following weight parts: C:1-5
Part, V:0.5-1 parts, W:1-5 parts, Cr:10-15 parts, Mo:10-15 parts, Si:1-5 parts, Ti:1-5 parts, Nb:0.1-0.5 parts, Zr:
0.5-1 parts, surplus Fe.
2. novel high-strength rotary cutter edge as described in claim 1, which is characterized in that by the raw material system comprising following weight parts
It is standby to form: C:1 parts, V:0.5 parts, W:1 parts, Cr:10 parts, Mo:10 parts, Si:1 parts, Ti:1 parts, Nb:0.1 parts, Zr:0.5 parts, remaining
Amount is Fe.
3. novel high-strength rotary cutter edge as described in claim 1, which is characterized in that by the raw material system comprising following weight parts
It is standby to form: C:2 parts, V:0.6 parts, W:2 parts, Cr:12 parts, Mo:12 parts, Si:2 parts, Ti:2 parts, Nb:0.2 parts, Zr:0.6 parts, remaining
Amount is Fe.
4. novel high-strength rotary cutter edge as described in claim 1, which is characterized in that by the raw material system comprising following weight parts
It is standby to form: C:3 parts, V:0.7 parts, W:3 parts, Cr:13 parts, Mo:13 parts, Si:3 parts, Ti:3 parts, Nb:0.3 parts, Zr:0.7 parts, remaining
Amount is Fe.
5. novel high-strength rotary cutter edge as described in claim 1, which is characterized in that by the raw material system comprising following weight parts
It is standby to form: C:4 parts, V:0.8 parts, W:4 parts, Cr:14 parts, Mo:14 parts, Si:4 parts, Ti:4 parts, Nb:0.4 parts, Zr:0.8 parts, remaining
Amount is Fe.
6. novel high-strength rotary cutter edge as described in claim 1, which is characterized in that by the raw material system comprising following weight parts
Standby to form: C:5 parts, V:1 parts, W:5 parts, Cr:15 parts, Mo:15 parts, Si:5 parts, Ti:5 parts, Nb:0.5 parts, Zr:1 parts, surplus is
Fe。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910405751.4A CN110016623A (en) | 2019-05-16 | 2019-05-16 | A kind of novel high-strength rotary cutter edge |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910405751.4A CN110016623A (en) | 2019-05-16 | 2019-05-16 | A kind of novel high-strength rotary cutter edge |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110016623A true CN110016623A (en) | 2019-07-16 |
Family
ID=67193744
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910405751.4A Pending CN110016623A (en) | 2019-05-16 | 2019-05-16 | A kind of novel high-strength rotary cutter edge |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101243199A (en) * | 2005-08-18 | 2008-08-13 | 伊拉斯蒂尔·克罗斯特公司 | Powder metallugically manufactured steel, a tool comprising the steel and a method for manufacturing the tool |
| CN103556083A (en) * | 2005-09-08 | 2014-02-05 | 伊拉斯蒂尔.克罗斯特公司 | Powder metallurgically manufactured high speed steel |
-
2019
- 2019-05-16 CN CN201910405751.4A patent/CN110016623A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101243199A (en) * | 2005-08-18 | 2008-08-13 | 伊拉斯蒂尔·克罗斯特公司 | Powder metallugically manufactured steel, a tool comprising the steel and a method for manufacturing the tool |
| CN103556083A (en) * | 2005-09-08 | 2014-02-05 | 伊拉斯蒂尔.克罗斯特公司 | Powder metallurgically manufactured high speed steel |
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Application publication date: 20190716 |
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