CN209736786U - device for processing thread on optical cable sheath - Google Patents
device for processing thread on optical cable sheath Download PDFInfo
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- CN209736786U CN209736786U CN201920167108.8U CN201920167108U CN209736786U CN 209736786 U CN209736786 U CN 209736786U CN 201920167108 U CN201920167108 U CN 201920167108U CN 209736786 U CN209736786 U CN 209736786U
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Abstract
A device for processing threads on an optical cable sheath comprises a clamping mechanism for clamping the optical cable sheath, wherein the thread processing device comprises a die 3 and a screw 6; the screw die 3 is arranged at the front end of the screw rod 6, and a screw rod hole 6-1 capable of accommodating the movement of the optical cable sheath is formed in the screw rod 6; the screw hole 6-1 is provided with a working hole for accommodating an optical cable sheath corresponding to the middle part of the working hole (screw die 3) of the screw die 3, and the screw 6 is of a structure capable of driving the screw die 3 to rotate and moving along the axial direction of the screw 6; rapidly clamping the device on a working table; the length of the processed thread is adjusted by adjusting the positions of two limit screws of the device; the optical cable is placed into the optical cable positioning frame to be clamped and positioned, and then the handle is rotated to complete thread machining. The device has the advantages of simple structure and accurate positioning, and the device is used for processing the threads of the optical cable sheath, so that the operation is simple, the labor is saved, the batch production is convenient, and the efficiency is improved.
Description
Technical Field
The utility model relates to a tooling device especially relates to a processing screw thread device on optical cable sheath.
Background
The optical cable sheath is softer, processes the screw thread on it, and the tradition adopts manual mode: one hand clamps the optical cable and the other hand rotates the sleeve buckle with the threading die. The labor intensity is high, the efficiency is low, sometimes the operation that the sheath deviates from the die hole fails, and therefore, a device is urgently needed to be designed to solve the problem.
SUMMERY OF THE UTILITY MODEL
Utility model purpose:
The utility model provides a processing screw thread device on optical cable sheath, its purpose is solved the problem that exists in the past.
The technical scheme is as follows:
A device for processing threads on an optical cable sheath comprises a clamping mechanism for clamping the optical cable sheath (the clamping mechanism is a locking clamp 17 capable of clamping the optical cable sheath, and the locking clamp 17 is a quick clamping clamp produced by Shenzhen Bo hardware Limited company, belongs to the known prior art, and can be any other clamping device in the existing form as long as the clamping of the optical cable can be satisfied!shown in figure 1 is a clamping clamp which can clamp in an up-and-down moving mode, and is characterized by further comprising a thread processing device;
the thread machining device comprises a die 3 and a screw 6; the screw die 3 is arranged at the front end of the screw rod 6, and a screw rod hole 6-1 capable of accommodating the movement of the optical cable sheath is formed in the screw rod 6; the screw hole 6-1 is provided with a working hole for accommodating an optical cable sheath corresponding to the middle part of the working hole (screw die 3) of the screw die 3, and the screw 6 is of a structure capable of driving the screw die 3 to rotate and moving along the axial direction of the screw 6;
the clamping position on the clamping device for the optical cable to pass through and clamping the optical cable corresponds to the working hole of the die 3, so that the die 3 can cover the optical cable sheath clamped by the clamping device for processing.
the device also comprises a group of limiting devices for limiting the front and back movement positions of the threading die 3. (the left and right in FIG. 1 are the front and rear directions, i.e., the axial direction of the screw 6)
the limiting device comprises a first limiting screw 7 and a second limiting screw 13, wherein the first limiting screw 7 is arranged above or below the screw rod 6, the first limiting screw 7 controls the position of the screw rod 6 to move axially backwards (backwards, namely to the right in figure 1), the second limiting screw 13 is arranged above or below the position of the clamping device for clamping the optical cable sheath, and the second limiting screw 13 controls the position of the screw rod 6 to move axially forwards.
the first limit screw 7 and the second limit screw 13 are both of a structure capable of moving along the self axial direction (so as to be convenient for adjusting the position of the screw 6 moving back and forth), the front end of the screw 6 is provided with an installation head for installing the dies 3, the diameter of the dies 3 is larger than that of the screw 6, or the dies 3 are directly installed at the front end of the screw 6, and the diameter of the dies 3 is larger than that of the screw 6 (the dies 3) and the screw 6 or the installation head are connected in any known mode in the prior art, as long as the dies 3 and the screw 6 can be fixed;
the axial distance between the first limit screw 7 and the screw 6 (i.e., the distance between the top and bottom in fig. 1) satisfies the following condition: when the screw 6 moves backwards to the position of the first limit screw 7, the first limit screw 7 can be pressed against the mounting head of the screw 6 or the rear end of the die 3;
the axial distance between the second limit screw 13 and the screw 6 (i.e., the distance between the top and bottom in fig. 1) satisfies the following condition: when the screw 6 moves forward to the position of the second limit screw 13, the second limit screw 13 can be pressed against the mounting head of the screw 6 or the front end of the die 3.
the clamping device is arranged on the mounting base plate 12 through the optical cable positioning frame 16, the screw 6 is arranged on the mounting base plate 12 through the screw support 4, the screw 6 is in threaded fit with the screw support 4 and can move along the axial direction of the screw support 4 through the rotation of the screw 6;
The first limit screw 7 extends into an adjusting hole 4-1 which is positioned above or below the screw 6 on the screw support 4 and is in threaded fit with the adjusting hole 4-1, and the first limit screw 7 is screwed to control the first limit screw 7 to move along the self axial direction;
The second limit screw 13 penetrates through a through hole 16-1 in the lower part of the optical cable positioning frame 16 and is positioned above or below the processed optical cable and in threaded fit with the through hole, and the axial movement of the second limit screw 13 is controlled by screwing the second limit screw 13.
The first and second limit screws 7 and 13 and the screw 6 are axially parallel. The front end of the screw rod 6 is provided with a processing head with the diameter increased for installing the screw die 3, the screw rod 6 drives the screw die 3 to move forwards to a forward limit position when the front end props against the second limit screw 13, and the screw rod 6 drives the screw die 3 to move backwards to a backward limit position when the rear end props against the first limit screw 7.
A handle 8 for swinging the screw 6 to rotate around its own axis is provided at the rear end of the screw 6.
The bottom of the mounting base 12 is provided with a clamping device 9 which in use clamps onto the work top plate 10.
the clamping device 9 comprises a clamping body 9-1 of a C-shaped structure and a vertical clamping bar 9-2 penetrating through the bottom of the clamping body 9-1, the vertical clamping bar 9-2 is in threaded fit with the bottom of the clamping body 9-1, the vertical clamping bar 9-2 is screwed to move up and down relative to the clamping body 9-1, the vertical clamping bar 9-2 moves up to enable the upper end of the vertical clamping bar 9-2 and the top of the clamping body 9-1 to clamp the work table plate 10 together, and the vertical clamping bar 9-2 moves down to enable the vertical clamping bar 9-2 to leave the work table plate 10. The clamping device 9 may also be a small bench clamp fitting available from Shandong force tools, Inc.
And a positioning groove which is used for accommodating the optical cable and has a guiding function is arranged at the position of the clamping mechanism for clamping the optical cable sheath. The optical cable positioning frame 16 is an L-shaped structure (as shown in fig. 1) formed by a vertical plate and a base, the through hole 16-1 is arranged in the base of the optical cable positioning frame 16, the positioning groove is arranged on the upper surface of the base of the optical cable positioning frame 16, the locking clamp 17 corresponds to the positioning groove, the locking clamp 17 is connected with the vertical plate of the optical cable positioning frame 16 through a third screw 18, when the optical cable positioning frame is used, the optical cable is arranged in the positioning groove to realize radial positioning and guiding, and the optical cable is clamped in the positioning groove through the locking clamp 17.
The advantages and effects are as follows:
the utility model discloses the purpose is for overcoming above-mentioned prior art not enough, provides a processing screw thread device on the optical cable, and the device presss from both sides tight optical cable sheath fast with locking pincers, and the automatic positioning centering, and screw thread processing can be accomplished to twist grip. The device comprises an end cover, a screw die, a screw rod support, a screw rod, a handle, a clamping device, an installation bottom plate, an optical cable positioning frame and locking pliers. One end of the screw is arranged in the screw die, is fastened through the end cover, and is screwed into the screw support, and the other end of the screw is connected with the handle; the screw rod bracket is provided with a first limiting screw which is fixed on the mounting bottom plate; the upper end of the optical cable positioning frame is provided with locking pliers, and the lower end of the optical cable positioning frame is provided with a second limiting screw which is fixed on the mounting bottom plate; the mounting bottom plate is fixedly connected with the clamping device by screws. The screw die and the screw are fastened through a first set screw and are on the same axis. The end cover is positioned with the spigot of the screw and is fastened on the screw through a second screw. The screw rod is connected with the screw rod support through threads, and the screw rod drives the screw die to move axially. The screw rod support is fixedly connected with the mounting bottom plate through a fourth screw. The optical cable support is provided with an optical cable positioning groove, the upper end of the optical cable support is provided with the locking clamp, the spanner for moving the locking clamp can lock the optical cable rapidly, and the positioning is accurate and convenient. And the optical fiber support is fixedly connected with the mounting base plate through a fifth screw. The clamping device is positioned with the spigot of the mounting base plate and is fastened through a first screw. The clamping device can be fixed on the working table top by rotating the screw rod.
The utility model rapidly clamps the device on the working table surface by rotating the screw rod of the clamping device; the length of the processed thread is adjusted by adjusting the positions of two limit screws of the device; the optical cable is placed into the optical cable positioning frame to be clamped and positioned, and then the handle is rotated to complete thread machining. The device has the advantages of simple structure and accurate positioning, and the device is used for processing the threads of the optical cable sheath, so that the operation is simple, the labor is saved, the batch production is convenient, and the efficiency is improved.
drawings
Fig. 1 is a front cross-sectional view of the device for processing threads on an optical cable sheath according to the present invention;
Fig. 2 is a left side view of the thread forming device for the optical cable sheath according to the present invention;
Fig. 3 is a top view of the device for processing threads on a cable jacket according to the present invention;
In the figure: 1. the novel optical cable fixing device comprises an end cover, 2 parts of a first set screw, 3 parts of a die, 4 parts of a screw rod support, 5 parts of a second set screw, 6 parts of a screw rod, 7 parts of a first limit screw, 8 parts of a handle, 9 parts of a clamping device, 10 parts of a working table plate, 11 parts of a first screw, 12 parts of a mounting base plate, 13 parts of a second limit screw, 14 parts of an optical cable, 15 parts of a second screw, 16 parts of an optical cable positioning frame 17, a locking clamp, 18 parts of a third screw, 19 parts of a fourth screw and 20 parts of a fifth screw.
Detailed Description
A device for processing threads on an optical cable sheath comprises a clamping mechanism for clamping the optical cable sheath (the clamping mechanism is a locking clamp 17 capable of clamping the optical cable sheath, the locking clamp 17 is a quick clamping clamp produced by Shenzhen Bo hardware Limited company, belongs to the known prior art, and can be used for any clamping device in other existing forms as long as the clamping device can clamp the optical cable), and is characterized in that: the device also comprises a thread machining device;
The thread machining device comprises a die 3 and a screw 6; the screw die 3 is arranged at the front end of the screw rod 6, and a screw rod hole 6-1 capable of accommodating the movement of the optical cable sheath is formed in the screw rod 6; the screw rod hole 6-1 is provided with a working hole for accommodating an optical cable sheath corresponding to the middle part of the working hole (screw die 3) of the screw die 3, and the screw rod 6 is of a structure which can drive the screw die 3 to rotate and can move along the screw rod 6 in the axial direction;
The clamping position on the clamping device for the optical cable to pass through and clamping the optical cable corresponds to the working hole of the die 3, so that the die 3 can cover the optical cable sheath clamped by the clamping device for processing.
The device also comprises a group of limiting devices for limiting the front and back movement positions of the threading die 3. (the left and right in FIG. 1 are the front and rear directions, i.e., the axial direction of the screw 6)
The limiting device comprises a first limiting screw 7 and a second limiting screw 13, wherein the first limiting screw 7 is arranged above or below the screw rod 6, the first limiting screw 7 controls the position of the screw rod 6 to move axially backwards (backwards, namely to the right in figure 1), the second limiting screw 13 is arranged above or below the position of the clamping device for clamping the optical cable sheath, and the second limiting screw 13 controls the position of the screw rod 6 to move axially forwards.
The first limit screw 7 and the second limit screw 13 are both of a structure capable of moving along the axial direction of the first limit screw (so as to be convenient for adjusting the position of the screw 6 moving back and forth), the front end of the screw 6 is provided with an installation head for installing the dies 3, the diameter of the installation head is larger than that of the screw 6, or the dies 3 are directly installed at the front end of the screw 6, and the diameter of the dies 3 is larger than that of the screw 6 (the connection mode of the dies 3 and the screw 6 or the installation head can be any known mode in the prior art, as long as the dies 3 and the screw 6 can be fixed);
The axial distance between the first limit screw 7 and the screw 6 (i.e., the distance between the top and bottom in fig. 1) satisfies the following condition: when the screw 6 moves backwards to the position of the first limit screw 7, the first limit screw 7 can be pressed against the mounting head of the screw 6 or the rear end of the die 3;
The axial distance between the second limit screw 13 and the screw 6 (i.e., the distance between the top and bottom in fig. 1) satisfies the following condition: when the screw 6 moves forward to the position of the second limit screw 13, the second limit screw 13 can be pressed against the mounting head of the screw 6 or the front end of the die 3.
The clamping device is arranged on the mounting base plate 12 through the optical cable positioning frame 16, the screw 6 is arranged on the mounting base plate 12 through the screw support 4, the screw 6 is in threaded fit with the screw support 4 and can move along the axial direction of the screw support 4 through the rotation of the screw 6;
The first limit screw 7 extends into an adjusting hole 4-1 which is positioned above or below the screw 6 on the screw support 4 and is in threaded fit with the adjusting hole 4-1, and the first limit screw 7 is screwed to control the first limit screw 7 to move along the self axial direction;
The second limit screw 13 penetrates through a through hole 16-1 in the lower part of the optical cable positioning frame 16 and is positioned above or below the processed optical cable and in threaded fit with the through hole, and the axial movement of the second limit screw 13 is controlled by screwing the second limit screw 13.
The first and second limit screws 7 and 13 and the screw 6 are axially parallel. The front end of the screw rod 6 is provided with a processing head with the diameter increased for installing the screw die 3, the screw rod 6 drives the screw die 3 to move forwards to a forward limit position when the front end props against the second limit screw 13, and the screw rod 6 drives the screw die 3 to move backwards to a backward limit position when the rear end props against the first limit screw 7.
A handle 8 for swinging the screw 6 to rotate around its own axis is provided at the rear end of the screw 6.
The bottom of the mounting base 12 is provided with a clamping device 9 which in use clamps onto the work top plate 10.
the clamping device 9 comprises a clamping body 9-1 of a C-shaped structure and a vertical clamping bar 9-2 penetrating through the bottom of the clamping body 9-1, the vertical clamping bar 9-2 is in threaded fit with the bottom of the clamping body 9-1, the vertical clamping bar 9-2 is screwed to move up and down relative to the clamping body 9-1, the vertical clamping bar 9-2 moves up to enable the upper end of the vertical clamping bar 9-2 and the top of the clamping body 9-1 to clamp the work table plate 10 together, and the vertical clamping bar 9-2 moves down to enable the vertical clamping bar 9-2 to leave the work table plate 10.
And a positioning groove which is used for accommodating the optical cable and has a guiding function is arranged at the position of the clamping mechanism for clamping the optical cable sheath.
the optical cable positioning frame 16 is an L-shaped structure (as shown in fig. 1) formed by a vertical plate and a base, the through hole 16-1 is arranged in the base of the optical cable positioning frame 16, the positioning groove is arranged on the upper surface of the base of the optical cable positioning frame 16, the locking clamp 17 corresponds to the positioning groove, the locking clamp 17 is connected with the vertical plate of the optical cable positioning frame 16 through a third screw 18, when the optical cable positioning frame is used, the optical cable is arranged in the positioning groove to realize radial positioning and guiding, and the optical cable is clamped in the positioning groove through the locking clamp 17.
The present invention will be further explained with reference to the accompanying drawings and examples.
the assembly mode is as follows: the clamping device 9 is fixed on the mounting base plate 12 through a first set screw 11 and is positioned through a spigot surface.
One end (front end) of the screw 6 is fitted into the die 3, for example: the front end of the screw rod 6 is provided with an installation head, a groove of the die 3 is arranged in the installation head, a hole communicated with a screw rod hole 6-1 is arranged in the groove, the die 3 is arranged in the groove, the hole of the die 3 corresponds to the inner hole of the groove, then the end cover 1 is buckled at the opening of the groove of the installation head, the end cover 1 extends into the groove of the installation head and props against the die 3, then the first set screw 2 is radially screwed into the threaded holes in the side faces of the end cover 1 and the installation head by the installation head, the end cover 1 is fixed with the installation head and the die 3, and the end cover 1 is also provided with a hole corresponding to the hole of the die 3. Of course, the end cap 1 may be fastened to the opening of the slot of the mounting head, and does not need to extend into the slot of the mounting head and abut against the dies 3, and then the first set screw 2 is screwed into the threaded holes on the side surfaces of the end cap 1 and the mounting head in the radial direction and abuts against the dies 3 by the first set screw 2, so that the end cap 1 is fixed to the mounting head and the dies 3.
after the screw 6 is screwed into the screw holder 4, the screw holder 4 is fastened to the mounting base plate 12 by a fifth screw 20.
The first limit screw 7 is installed in the screw bracket 4, and the axial movement initial position of the length adjusting screw 6 is screwed out by the first limit screw 7.
The locking clamp 17 is fixed on the upper part of the optical cable positioning frame 16 through a third screw 18, a second limiting screw 13 is arranged on the lower part of the optical cable positioning frame 16, and the optical cable positioning frame 16 is fixed on the installation bottom plate 12 through a fourth screw 19.
the axial movement end position of the length-adjustment screw 6 is screwed out by the second limit screw 13.
the working mode is as follows: the vertical clamping bar 9-2 is rotated to enable the clamping main body 9-1 to be rapidly clamped on the working table top 10; putting the optical cable into optical cable locating rack 16, utilizing clamp pliers 17 to clamp and position, clockwise rotating handle 8, making handle 8 drive screw rod 6 and die 3 and do synchronous rotation, making the optical cable enter into and begin thread processing in die 3, after rotating to the final position and pushing against second stop screw 13 promptly, anticlockwise rotating handle 8 makes screw rod 6 move back to the initial position again, when processing head or die rear end withstood first stop screw 7 promptly, make the optical cable also withdraw from the die completely, accomplish optical cable thread processing.
Claims (10)
1. The utility model provides a device of processing screw thread on optical cable sheath, includes the clamping mechanism who presss from both sides tight optical cable sheath, its characterized in that: the device also comprises a thread machining device;
The thread machining device comprises a die (3) and a screw (6); the screw die (3) is arranged at the front end of the screw rod (6), and a screw rod hole (6-1) capable of accommodating the movement of the optical cable sheath is formed in the screw rod (6); the screw rod hole (6-1) corresponds to a working hole of the screw die (3), and the screw rod (6) is of a structure capable of driving the screw die (3) to rotate and moving along the axial direction of the screw rod;
The clamping position on the clamping device for the optical cable to pass through and capable of clamping the optical cable corresponds to the working hole of the die (3), so that the die (3) can sleeve the optical cable sheath clamped by the clamping device for processing.
2. an apparatus for threading a cable jacket according to claim 1, wherein: the device also comprises a group of limiting devices for limiting the front and back movement positions of the dies (3).
3. An apparatus for threading a cable jacket according to claim 2, wherein: the limiting device comprises a first limiting screw (7) and a second limiting screw (13), wherein the first limiting screw (7) is arranged above or below a screw rod (6), the first limiting screw (7) controls the backward axial movement position of the screw rod (6), the second limiting screw (13) is arranged above or below the position of a clamping optical cable sheath of a clamping device, and the second limiting screw (13) controls the forward axial movement position of the screw rod (6).
4. An apparatus for threading a cable jacket according to claim 3, wherein: the first limiting screw (7) and the second limiting screw (13) are both structures capable of moving along the axial direction of the first limiting screw, an installing head for installing the dies (3) is arranged at the front end of the screw (6), the diameter of the installing head is larger than that of the screw (6), or the dies (3) are directly installed at the front end of the screw (6), and the diameter of the dies (3) is larger than that of the screw (6);
the axial distance between the first limiting screw (7) and the screw (6) meets the following condition: when the screw rod (6) moves backwards to the position of the first limit screw (7), the first limit screw (7) can prop against the mounting head of the screw rod (6) or the rear end of the die (3);
the axial distance between the second limiting screw (13) and the screw (6) meets the following conditions: when the screw rod (6) moves forwards to the position of the second limit screw (13), the second limit screw (13) can be pressed against the mounting head of the screw rod (6) or the front end of the die (3).
5. An apparatus for threading a cable jacket according to claim 4, wherein: the clamping device is arranged on the mounting base plate (12) through an optical cable positioning frame (16), the screw (6) is arranged on the mounting base plate (12) through the screw support (4), and the screw (6) is in threaded fit with the screw support (4) and can move along the axial direction of the screw support (4) through the rotation of the screw (6);
The first limit screw (7) extends into an adjusting hole (4-1) which is positioned above or below the screw (6) on the screw support (4) and is in threaded fit with the adjusting hole (4-1), and the first limit screw (7) is controlled to move along the axial direction of the first limit screw (7) by screwing the first limit screw (7);
The second limiting screw (13) penetrates through a through hole (16-1) in the lower portion of the optical cable positioning frame (16) and located above or below the processed optical cable and is in threaded fit with the through hole, and the axial movement of the second limiting screw (13) is controlled by screwing the second limiting screw (13).
6. An apparatus for threading a cable jacket according to claim 4 or 5, wherein: the first limiting screw (7), the second limiting screw (13) and the screw (6) are axially parallel.
7. An apparatus for threading a cable jacket according to claim 1, wherein: the rear end of the screw rod (6) is provided with a handle (8) which can swing the screw rod (6) to rotate by taking the shaft of the screw rod as the shaft.
8. an apparatus for threading a cable jacket according to claim 5, wherein: the bottom of the mounting base plate (12) is provided with a clamping device (9) which is clamped on the working table plate (10) when in use.
9. an apparatus for threading a cable jacket according to claim 8, wherein: the clamping device (9) comprises a clamping main body (9-1) of a C-shaped structure and a vertical clamping bar (9-2) penetrating through the bottom of the clamping main body (9-1), the vertical clamping bar (9-2) is in threaded fit with the bottom of the clamping main body (9-1), the vertical clamping bar (9-2) moves up and down relative to the clamping main body (9-1) by screwing the vertical clamping bar (9-2), the vertical clamping bar (9-2) moves up to enable the upper end of the vertical clamping bar (9-2) and the top of the clamping main body (9-1) to clamp the working table plate (10) together, and the vertical clamping bar (9-2) moves down to enable the vertical clamping bar (9-2) to leave the working table plate (10).
10. An apparatus for threading a cable jacket according to claim 4, wherein: and a positioning groove which is used for accommodating the optical cable and has a guiding function is arranged at the position of the clamping mechanism for clamping the optical cable sheath.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920167108.8U CN209736786U (en) | 2019-01-31 | 2019-01-31 | device for processing thread on optical cable sheath |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920167108.8U CN209736786U (en) | 2019-01-31 | 2019-01-31 | device for processing thread on optical cable sheath |
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| Publication Number | Publication Date |
|---|---|
| CN209736786U true CN209736786U (en) | 2019-12-06 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201920167108.8U Active CN209736786U (en) | 2019-01-31 | 2019-01-31 | device for processing thread on optical cable sheath |
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| CN (1) | CN209736786U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111805017A (en) * | 2020-06-30 | 2020-10-23 | 临沂矿业集团菏泽煤电有限公司 | Bolt and nut cleaning and reusing device |
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2019
- 2019-01-31 CN CN201920167108.8U patent/CN209736786U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111805017A (en) * | 2020-06-30 | 2020-10-23 | 临沂矿业集团菏泽煤电有限公司 | Bolt and nut cleaning and reusing device |
| CN111805017B (en) * | 2020-06-30 | 2022-07-08 | 临沂矿业集团菏泽煤电有限公司 | Bolt and nut cleaning and reusing device |
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