CN111644768B - Pick toothholder fixed-position welding device on cutterhead - Google Patents
Pick toothholder fixed-position welding device on cutterhead Download PDFInfo
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- CN111644768B CN111644768B CN202010455619.7A CN202010455619A CN111644768B CN 111644768 B CN111644768 B CN 111644768B CN 202010455619 A CN202010455619 A CN 202010455619A CN 111644768 B CN111644768 B CN 111644768B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K31/00—Processes relevant to this subclass, specially adapted for particular articles or purposes, but not covered by only one of the preceding main groups
- B23K31/02—Processes relevant to this subclass, specially adapted for particular articles or purposes, but not covered by only one of the preceding main groups relating to soldering or welding
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K37/00—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups
- B23K37/04—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups for holding or positioning work
- B23K37/0426—Fixtures for other work
- B23K37/0435—Clamps
- B23K37/0443—Jigs
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- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Butt Welding And Welding Of Specific Article (AREA)
Abstract
The invention discloses a cutting pick holder positioning welding device on a cutting head, which comprises a bent plate assembly, a fixed table, an angle positioning piece and a first screw, wherein the cutting head needing to be welded with the cutting pick holder is placed on the fixed table, the bent plate assembly can be rotatably arranged on the top of the cutting head, the bent plate assembly comprises more than one bent plate connecting plate, the bent plate connecting plate is wound on the outer side of the cutting head, the bottom of the bent plate connecting plate is locked on the outer edge of the fixed table through the first screw, and the outer edge is provided with a whole circle of circumferential scales; the angle positioning piece is characterized in that a plurality of groups of positioning holes for installing and positioning the angle positioning piece are formed in the bent plate connecting plate, and the other end of the angle positioning piece is used for positioning the cutting pick tooth holder to the outer surface of the cutting head. The device for positioning and welding the cutting pick holder on the cutting head can improve the accuracy of the mounting position of the cutting pick holder and improve the working efficiency of positioning and welding the cutting pick holder.
Description
Technical Field
The invention relates to the technical field of auxiliary equipment of a heading machine, in particular to a positioning welding device for a cutting pick holder on a cutting head.
Background
The heading machine is suitable for heading and mining of tunnels, coal and rock roadways and underground engineering. The cutting head is arranged at the front part of the heading machine and is a core component for directly crushing coal and rock, and when the heading machine works, the cutting head plays a role of stripping the coal and the rock from the matrix. The cutting head of the heading machine is used as a core working mechanism of the heading machine, the cutting power of the cutting head accounts for 70% -80% of the whole machine power of the heading machine, the performance directly determines the performance of the heading machine, the arrangement parameters of cutting teeth of the cutting head play a key role in the load fluctuation, the cutting energy specific consumption and the whole machine stability of the cutting head, and the cutting head has a great influence on the performance of the heading machine. The cutting device of the heading machine comprises a cutting head body, a cutting pick, a tooth holder, a guide plate, a water nozzle and the like. The arrangement of the cutting pick seats of the cutting head is complex, and the positioning parameters are complex. The cutting pick tooth holder is arranged on the cutting head body in a spiral line mode, and the positioning precision of the cutting pick tooth holder directly influences the performance of the cutting head.
Referring to figure 8, the heading machine head has 6 degrees of freedom in pick space, the location of which is determined by the coordinates of the point of the pick (Z, R, θ) and the pick mounting angle (γ, α, β). The tooth point is determined according to the circumferential difference angle delta theta of adjacent cutting teeth of the same spiral line and the spiral line helix angle. In order to facilitate the installation of the cutting pick, an installation process angle is defined, which is an angle used when the cutting pick is welded and installed on a cutting head, and is defined as an elevation angle gamma, a rotation angle alpha and a chamfer angle beta. Elevation angle γ: the projection angle of the cutting angle delta on the symmetrical central plane (corner plane) of the tooth holder; chamfering beta: the included angle between the pi 2 plane and the pi 1; rotation angle α: and the included angle between the pi 3 plane and the pi 2.
The welding positioning tool in the prior art can be positioned, the angle can be adjusted, the positioning is not accurate, the operation is relatively complex, the use is inconvenient, and the machining efficiency is low. And in addition, the manipulator is adopted for positioning, although the positioning is accurate, the equipment is expensive, the requirement on welding operators of the cutting pick holder is high, and the production cost is high.
Therefore, how to provide a positioning and welding device for a cutting pick holder on a cutting head to solve the above-mentioned drawbacks is a technical problem that needs to be solved urgently by those skilled in the art.
Disclosure of Invention
The invention aims to provide a device for positioning and welding a cutting pick holder on a cutting head, which not only can improve the accuracy of the mounting position of the cutting pick holder, but also can improve the working efficiency of positioning and welding the cutting pick holder.
In view of the above, the invention provides a cutting pick holder positioning and welding device on a cutting head, which comprises a bending plate assembly, a fixed table, an angle positioning piece and a first screw, wherein the cutting head needing to be welded with the cutting pick holder is placed on the fixed table, the bending plate assembly can be rotatably mounted on the top of the cutting head, the bending plate assembly comprises more than one bending plate connecting plate, the bending plate connecting plate is wound on the outer side of the cutting head, the bottom of the bending plate connecting plate is locked on the outer edge of the fixed table through the first screw, and the outer edge is provided with a whole circle of circumferential scales; the angle positioning piece is characterized in that a plurality of groups of positioning holes for installing and positioning the angle positioning piece are formed in the bent plate connecting plate, and the other end of the angle positioning piece is used for positioning the cutting pick tooth holder to the outer surface of the cutting head.
The invention has the beneficial effects that: through the setting that the bent plate subassembly 2 can be rotatory in the cutterhead 1 outside, be convenient for with pick toothholder 101 through angle location spare 4 with the bent plate is even the board is fixed a position to the design fast, locks first screw 5 before the welding and prevents to take place to remove among the welding process, and after spot welding fixes a pick toothholder 101, unclamp first screw 5 with the angle of bent plate subassembly 2 along the rotatory settlement of the central axis after, lock first screw 5 once more, repeated welding. When the bending plate assembly 2 comprises two or more bending plate connecting plates, the rotation angle of the bending plate assembly 2 can be conveniently positioned at one time, and two or more cutting tooth holders 101 can be simultaneously positioned and welded. The device for positioning and welding the cutting pick holder on the cutting head can improve the accuracy of the mounting position of the cutting pick holder and improve the working efficiency of positioning and welding the cutting pick holder.
Furthermore, the bent plate connecting plate is three, wherein one bent plate connecting plate and the other two bent plate connecting plates are all provided with a-degree circumferential included angles.
Preferably, the circumferential included angle a is 134 degrees.
Furthermore, the angle positioning piece comprises a positioning plate, a positioning block, a side plate, a second screw and a positioning column, the positioning plate is connected to the bent plate assembly in a positioning mode, the positioning block is connected between the positioning plate and the positioning column, and the side plate is installed on the positioning block through the second screw; the positioning column is inserted into a cutting pick mounting hole of the cutting pick holder, and the side plate positions the side wall of the cutting pick holder.
Preferably, the locating plate is provided with a locating shaft and a locating waist-shaped hole, and correspondingly, the angle locating piece is located on the bent plate connecting plate at each time, two locating holes are arranged at the position of the angle locating piece, the locating holes are inserted into the locating shaft in a matched mode, and the locating holes are aligned with the locating waist-shaped hole.
Furthermore, the top of the bent plate assembly is provided with a shaft sleeve, the shaft sleeve is rotatably positioned and connected to a second pin shaft, and the bottom of the second pin shaft is connected to a threaded hole in the center of the top of the cutting head through a screw rod.
Furthermore, a bearing is arranged at the bottom of the bent plate connecting plate, and the outer ring wall of the bearing is in rolling contact with the outer peripheral vertical wall of the outer edge of the fixed table.
Preferably, the bearing is installed in a notch formed in the bottom of the bent plate connecting plate and towards the inner side through a first pin shaft, and gaskets are arranged on the upper surface and the lower surface of the bearing.
Preferably, the bottom surface of the bent plate connecting plate is further provided with a baffle plate, the baffle plate is fixedly connected to the bottom surface of the bent plate connecting plate through a third screw, and the baffle plate and the projection at the first screw mounting position are clamped on the outer edge of the fixing table.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.
FIG. 1 is a schematic perspective view of the present invention;
FIG. 2 is a schematic front view of the present invention;
FIG. 3 is a schematic top view of the present invention;
FIG. 4 is a schematic sectional view A-A of FIG. 3;
FIG. 5 is a partially enlarged view of the portion I in FIG. 4;
FIG. 6 is a partially enlarged view of the portion J in FIG. 4;
FIG. 7 is a perspective view of an angle positioning member according to the present invention;
figure 8 is a schematic diagram of the pick block mounting location parameters.
The cutting tool comprises a cutting head 1, a cutting pick holder 101, a bending plate assembly 2, a shaft sleeve 201, a positioning hole 202, a fixing table 3, an angle positioning piece 4, a positioning plate 401, a positioning shaft 4011, a positioning kidney-shaped hole 4012, a positioning block 402, a side plate 403, a second screw 404, a positioning column 405, a first screw 5, a baffle 6, a third screw 601, a bearing 7, a first pin 701 and a second pin 8.
Detailed Description
The core of the invention is to provide the device for positioning and welding the pick holder on the cutting head, which not only can improve the accuracy of the mounting position of the pick holder, but also can improve the working efficiency of positioning and welding the pick holder.
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.
In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.
Referring to the drawings, FIG. 1 is a schematic perspective view of the present invention; FIG. 2 is a schematic front view of the present invention; FIG. 3 is a schematic top view of the present invention; FIG. 4 is a schematic sectional view A-A of FIG. 3; FIG. 5 is a partially enlarged view of the portion I in FIG. 4; FIG. 6 is a partially enlarged view of the portion J in FIG. 4; FIG. 7 is a perspective view of an angle positioning member according to the present invention; figure 8 is a schematic diagram of the pick block mounting location parameters.
In a specific embodiment, as shown in fig. 1 to 4, a device for positioning and welding a pick holder on a cutting head comprises a bending plate assembly 2, a fixed table 3, an angle positioning member 4 and a first screw 5, wherein the cutting head 1 to be welded with the pick holder 101 is placed on the fixed table 3, and an inner ring boss of the fixed table 3 is inserted into an inner hole below the cutting head 1, so that the cutting head 1 and the fixed table 3 are arranged coaxially. The top of bent plate subassembly 2 can be rotatory install the 1 top of cutterhead, and bent plate subassembly 2 includes the company's of more than one bent plate board, the bending form of bent plate link board is unanimous with cutterhead 1 appearance, the bent plate link board is around establishing in the cutterhead 1 outside, the bent plate links board bottom and locks on fixed station 3's outer edge through first screw 5, be provided with the circumference scale of whole circle along the upper surface outward, sign circumference angle. The angle positioning piece 4 is arranged on the cutting head 1, the cutting pick tooth holder 101 is arranged on the outer surface of the cutting head 1, and the positioning holes 202 are matched with the angle positioning piece 4 and used for determining the circumferential angle theta, the axial distance Z and the cutting radius R of the cutting pick tooth tip.
Through the setting that the bent plate subassembly 2 can be rotatory in the cutterhead 1 outside, be convenient for with pick toothholder 101 through angle location spare 4 with the bent plate is even the board is fixed a position to the design fast, locks first screw 5 before the welding and prevents to take place to remove among the welding process, and after spot welding fixes a pick toothholder 101, unclamp first screw 5 with the angle of bent plate subassembly 2 along the rotatory settlement of the central axis after, lock first screw 5 once more, repeated welding. When the bending plate assembly 2 comprises two or more bending plate connecting plates, the rotation angle of the bending plate assembly 2 can be conveniently positioned at one time, and two or more cutting tooth holders 101 can be simultaneously positioned and welded. The device for positioning and welding the cutting pick holder on the cutting head can improve the accuracy of the mounting position of the cutting pick holder and improve the working efficiency of positioning and welding the cutting pick holder.
In an embodiment of the present invention, as shown in fig. 1 to 4, three bent plate connecting plates are specifically adopted, and circumferential included angles between one bent plate connecting plate and the other two bent plate connecting plates are all a degrees.
Specifically, as shown in fig. 3, the circumferential angle a is 134 degrees.
The pick holders 101 on the outer surface of the general cutting head 1 are distributed on three spiral lines, the angle of the initial positions of the three spiral lines is regular, and the difference between the middle spiral line and the other two spiral lines is 134 degrees. The cutting pick tooth holder 101 on the spiral line is simultaneously welded in a fixed position mode by arranging the three bending plate connecting plates and the three bending plate assemblies 2 formed by the other two bending plate connecting plates, wherein the circumferential included angles between the two bending plate connecting plates are 134 degrees. Simultaneously, three 2 structural strength of bent plate subassembly that bent plate even board is constituteed are for single bent plate subassembly 2 of bent plate even board is bigger, has improved the reliability of equipment operation, has increased the life of equipment.
In an embodiment of the present invention, as shown in fig. 7 and 8, the angle positioning element 4 includes a positioning plate 401, a positioning block 402, a side plate 403, a second screw 404 and a positioning column 405, the positioning plate 401 is connected to the bending plate assembly 2 in a positioning manner, the positioning block 402 is connected between the positioning plate 401 and the positioning column 405, and the side plate 403 is mounted on the positioning block 402 by two second screws 404; the locating post 405 is inserted into a pick mounting hole of the pick block 101 and the side plate 403 locates the side wall of the pick block 101.
Specifically, as shown in fig. 7 and 8, the positioning plate 401 is provided with a positioning shaft 4011 and a positioning kidney-shaped hole 4012, two positioning holes 202 are provided at the position of the angle positioning piece 4 on the corresponding bent plate connecting plate at each time, the inner positioning hole 202 is inserted into the positioning shaft 4011 in a matching manner, and the outer positioning hole 202 is aligned with the positioning kidney-shaped hole 4012.
Wherein, the included angle between the central axis of the positioning block 402 and the axis of the positioning hole 202 is an elevation angle γ; the included angle between the plane of the side plate 403 and the positioning plate 401 is a corner alpha; the angle between the center plane of the positioning plate 401 and the horizontal plane is a chamfer angle β.
Through the setting of angle setting element 4, both guaranteed that pick toothholder 101 is installed smoothly on the cutterhead 1, guaranteed the relative position of pick toothholder 101 and pick simultaneously, guaranteed that every pick toothholder 101 accords with pick installation design requirement after the welding. The pick holder positioning welding device on the cutting head greatly reduces the working difficulty and improves the working efficiency. The position of the cutting tooth is accurately found by using the angle positioning piece 4 according to design parameters, and the rock cutting capability and the cutting efficiency of the whole heading machine are guaranteed.
In an embodiment of the present invention, as shown in fig. 4 and 6, the top of the bending plate assembly 2 is provided with a shaft sleeve 201, the shaft sleeve 201 is rotatably positioned and connected to the second pin 8, and the bottom of the second pin 8 is connected to a threaded hole in the center of the top of the cutting head 1 through a screw.
The second pin shaft 8 is ingeniously arranged to be positioned and installed through a threaded hole in the center of the top of the cutting head 1, and the rotation of the bent plate assembly 2 and the coaxial arrangement of the cutting head 1 are guaranteed.
In an embodiment of the present invention, as shown in fig. 2, 4 and 5, the bottom of the bent plate connecting plate is provided with a bearing 7, and an outer ring wall of the bearing 7 is in rolling contact with an outer peripheral standing wall of the fixed table 3. The bearing 7 is specifically a deep groove ball bearing.
Specifically, as shown in fig. 5, the bearing 7 is mounted in a notch formed inward at the bottom of the bent plate connecting plate by a first pin 701 disposed vertically, and the upper and lower surfaces of the bearing 7 are provided with spacers. The problem of rubbing interference between the outer ring of the bearing 7 and the side wall of the installed notch in the rotating process can be avoided through the arrangement of the gasket.
Specifically, as shown in fig. 5, a baffle 6 is further disposed on the bottom surface of the bent plate connecting plate, the baffle 6 is fixedly connected to the bottom surface of the bent plate connecting plate through a third screw, and the baffle 6 is clamped to the outer edge of the fixing table 3 with a projection at the installation position of the first screw 5.
Through the setting of bearing 7, the outer lane wall rolling contact fixed station 3 of bearing 7 is outer along the mode of outer circumference upright wall to carry out the location connection, replaces direct contact sliding friction location through the rolling friction mode, can avoid wearing and tearing and noise, has improved the life of equipment. The baffle 6 is arranged to block the mounting hole of the first pin shaft 701, so that the first pin shaft 701 can be prevented from falling off downwards in the use and operation process of the invention, and meanwhile, the first pin shaft is prevented from falling off the outer edge of the fixed platform 3 when the invention is subjected to lateral overturning moment, and the overturning damage is avoided.
Through a large amount of use experience and statistical measurement data, the installation parameters of the cutting teeth and the tooth holder on the cutting head, which are processed by the cutting tooth holder positioning and welding device on the cutting head, are compared with theoretical design parameters to discover that: the cutting radius R mean error is-2 mm, the axial distance Z mean error is 0.3mm, the circumferential angle theta mean error is 1 degree, the chamfer angle beta mean error is 1 degree, the corner alpha mean error is 0.2 degree, the elevation angle gamma mean error is 0.5 degree, the cutting pick arrangement accuracy is improved, and the uniform cutting pick distribution is guaranteed technically.
The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other. The device disclosed by the embodiment corresponds to the method disclosed by the embodiment, so that the description is simple, and the relevant points can be referred to the method part for description.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (3)
1. The cutting pick tooth holder positioning and welding device on the cutting head is characterized by comprising a bent plate assembly (2), a fixed table (3), an angle positioning piece (4) and first screws (5), wherein the cutting head (1) needing to be welded with a cutting pick tooth holder (101) is placed on the fixed table (3), the bent plate assembly (2) can be rotatably installed at the top of the cutting head (1), the bent plate assembly (2) comprises three bent plate connecting plates, the circumferential included angle between one bent plate connecting plate and the other two bent plate connecting plates is 134 degrees, the three bent plate connecting plates are wound on the outer side of the cutting head (1), the bottoms of the three bent plate connecting plates are locked on the outer edge of the fixed table (3) through the first screws (5), and the outer edge is provided with a whole circle of circumferential scales; a plurality of groups of positioning holes (202) for installing and positioning the angle positioning piece (4) are formed in the bent plate connecting plate, and the pick tooth holder (101) is positioned on the outer surface of the cutting head (1) by the other end of the angle positioning piece (4);
the angle positioning piece (4) comprises a positioning plate (401), a positioning block (402), a side plate (403), a second screw (404) and a positioning column (405), the positioning plate (401) is connected to the bent plate assembly (2) in a positioning mode, the positioning block (402) is connected between the positioning plate (401) and the positioning column (405), and the side plate (403) is installed on the positioning block (402) through the second screw (404); the positioning column (405) is inserted into a cutting pick mounting hole of the cutting pick holder (101), and the side plate (403) positions the side wall of the cutting pick holder (101);
a bearing (7) is arranged at the bottom of the bent plate connecting plate, and the outer ring wall of the bearing (7) is in rolling contact with the outer peripheral vertical wall of the outer edge of the fixed table (3);
the bearing (7) is arranged in a notch formed in the bottom of the bent plate connecting plate and towards the inner side through a first pin shaft (701), and gaskets are arranged on the upper surface and the lower surface of the bearing (7);
the bottom surface of the bent plate connecting plate is further provided with a baffle (6), the baffle (6) is fixedly connected to the bottom surface of the bent plate connecting plate through a third screw, and the baffle (6) and a lug at the mounting position of the first screw (5) are clamped to the outer edge of the fixing table (3).
2. The cutting pick holder positioning welding device of claim 1, characterized in that a positioning shaft (4011) and a positioning waist-shaped hole (4012) are arranged on the positioning plate (401), two positioning holes (202) are arranged on the corresponding bent plate connecting plate at the position of positioning the angle positioning piece (4) each time, the inner side of the positioning hole (202) is inserted into the positioning shaft (4011) in a matching way, and the outer side of the positioning hole (202) is aligned with the positioning waist-shaped hole (4012).
3. The cutting pick holder positioning welding device of the cutting head according to the claim 1, characterized in that the top of the bending plate component (2) is provided with a shaft sleeve (201), the shaft sleeve (201) is rotatably positioned and connected on a second pin shaft (8), and the bottom of the second pin shaft (8) is connected to a threaded hole in the center of the top of the cutting head (1) through a screw rod.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010455619.7A CN111644768B (en) | 2020-05-26 | 2020-05-26 | Pick toothholder fixed-position welding device on cutterhead |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010455619.7A CN111644768B (en) | 2020-05-26 | 2020-05-26 | Pick toothholder fixed-position welding device on cutterhead |
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| Publication Number | Publication Date |
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| CN111644768A CN111644768A (en) | 2020-09-11 |
| CN111644768B true CN111644768B (en) | 2022-05-03 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202010455619.7A Active CN111644768B (en) | 2020-05-26 | 2020-05-26 | Pick toothholder fixed-position welding device on cutterhead |
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| CN203197509U (en) * | 2013-04-26 | 2013-09-18 | 四川华通特种工程塑料研究中心有限公司 | Mechanism for conveniently positioning U-shaped steel sheets welded synchronously |
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| CN109048721B (en) * | 2018-10-17 | 2024-03-01 | 辽宁工程技术大学 | Cutting head pick positioner of heading machine |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2011134524A1 (en) * | 2010-04-29 | 2011-11-03 | Lw-Group | Laser cutting machine with unloading unit having a fork with rolling element |
| CN201815826U (en) * | 2010-10-04 | 2011-05-04 | 湖南永安煤矿机械制造有限公司 | Tool for installing picks of cutting head of roadheader |
| CN203600094U (en) * | 2013-10-14 | 2014-05-21 | 江苏中机矿山设备有限公司 | Universal tool for positioning cutting head tooth holder of heading machine |
| CN204122985U (en) * | 2014-08-29 | 2015-01-28 | 内蒙古北方重工业集团有限公司 | The assembly tooling of cutting head of roadheader toothholder |
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| CN108747154A (en) * | 2018-06-28 | 2018-11-06 | 辽宁工程技术大学 | A kind of pick installation positioner and its application method |
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| CN111644768A (en) | 2020-09-11 |
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