CN206689478U - A kind of special-shaped movable corner connectors sectional material drilling machine structure - Google Patents
A kind of special-shaped movable corner connectors sectional material drilling machine structure Download PDFInfo
- Publication number
- CN206689478U CN206689478U CN201720379732.5U CN201720379732U CN206689478U CN 206689478 U CN206689478 U CN 206689478U CN 201720379732 U CN201720379732 U CN 201720379732U CN 206689478 U CN206689478 U CN 206689478U
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- Prior art keywords
- drilling machine
- bracket
- section bar
- cylinder
- hole
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- 238000005553 drilling Methods 0.000 title claims abstract description 56
- 239000000463 material Substances 0.000 title claims abstract description 24
- 230000000875 corresponding Effects 0.000 claims abstract description 7
- 230000000694 effects Effects 0.000 claims description 10
- 210000003414 Extremities Anatomy 0.000 abstract description 33
- 238000006073 displacement reaction Methods 0.000 abstract description 9
- 230000003993 interaction Effects 0.000 abstract description 6
- 238000007906 compression Methods 0.000 abstract description 3
- 238000010276 construction Methods 0.000 description 10
- 238000004080 punching Methods 0.000 description 6
- 241000196324 Embryophyta Species 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 241001074085 Scophthalmus aquosus Species 0.000 description 2
- 238000005520 cutting process Methods 0.000 description 2
- 238000003754 machining Methods 0.000 description 2
- 230000001360 synchronised Effects 0.000 description 2
- 229910000838 Al alloy Inorganic materials 0.000 description 1
- 241000731961 Juncaceae Species 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminum Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000006011 modification reaction Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 230000001052 transient Effects 0.000 description 1
Abstract
The utility model discloses a kind of special-shaped movable corner connectors sectional material drilling machine structure, including workbench, U-bracket is provided with the table, two side pressure cylinders, two right angled triangle framves, two compact heaps and lower air cylinder, through hole is provided with the middle part of compact heap, two side pressure cylinders are fixed on U-bracket inwall, lower air cylinder is fixed on the madial wall of U-bracket, drilling machine is fixed with the output end of lower air cylinder, upper drilling machine is provided with bit, top gas cylinder is mounted on the hypotenuse of two right angled triangle framves, lower drilling machine is provided with the output end of upper top gas cylinder, the drill bit of two lower drilling machines is corresponding with through hole.Before being processed to circular hole, side pressure cylinder drives fastening block above to be displaced downwardly to the upper surface compression of section bar group, start lower air cylinder, the drill bit on bit is set to be acted on after running through through hole on the convex limb of corner brace section bar, section bar group then realizes 2 points of clampings, avoids drilling hour angle pattern material and slight displacement occurs because of the influence of interaction force.
Description
Technical field
It the utility model is related to special-shaped movable corner connectors production field, and in particular to a kind of special-shaped movable corner connectors sectional material drilling machine
Structure.
Background technology
Aluminum window has attractive in appearance, sealing, intensity high, is widely used in building engineering field.Aluminum alloy doors and windows are producing
It is attached in processing, it is necessary to use movable corner connectors.As shown in figure 3, existing small-sized movable corner connectors are by the corner brace A that cooperates
Formed with corner brace B, and the connecting hole of screw bolt and nut is provided with corner brace A and corner brace B recessed limb, corner brace A's and corner brace B
Circular hole is provided with convex limb, convex limb bottom is provided with slide plate 24, and circular hole is provided with locating dowel 23, connected between locating dowel 23 and slide plate 24
There is spring, corner brace A is connected with corner brace B by bolt 22 with nut.As shown in figure 4, existing large-scale activity corner brace and small-sized work
Dynamic corner brace difference is that corner brace A and corner brace B convex limb bottom eliminate the setting of slide plate 24, convex limb bottom by completely enclosed,
To realize the use intensity of large-scale activity corner brace.And a kind of (the application of processing unit (plant) of movable corner connectors is disclosed in the prior art
Number：2016112705708), the device is realizing corner brace automation working process, saves production cost, but processing
Single sectional can only be handled during production, i.e., can only carry out boring circular hole and connecting hole for corner brace A or corner brace B in drilling,
And the small-sized movable corner connectors that convex limb bottom is provided with slide plate are can be only applied to, processing efficiency is relatively low, while application is small.
Utility model content
The utility model purpose is to provide a kind of special-shaped movable corner connectors sectional material drilling machine structure, the work applied to all kinds of models
Dynamic corner brace production and processing, while increasing use range, improves processing efficiency.
The utility model is achieved through the following technical solutions：
A kind of special-shaped movable corner connectors sectional material drilling machine structure, including workbench, two side pressure gas are provided with the workbench
Cylinder, two right angled triangle framves, lower air cylinder, two in be spaced apart compact heap, opening face feeding mechanism export direction
U-bracket, be provided with through hole in the middle part of compact heap, two side pressure cylinders are fixed on U-bracket inwall and positioned at compact heap
Top, the output end of two side pressure cylinders are connected with compact heap both ends above respectively, and underlying compact heap is fixed
In the bottom of U-bracket, the slide rail in horizontality is provided with U-bracket side wall, vertical slide is slidably arranged in slide rail
On, the lower air cylinder is fixed on the madial wall of U-bracket, and is fixed with drilling machine in the output end of lower air cylinder, on
Drilling machine is provided with the bit of two face through holes, and top gas cylinder is mounted on the hypotenuse of two right angled triangle framves, and
Lower drilling machine is provided with the output end of upper top gas cylinder, the drill bit of two lower drilling machines is close to each other and leads to underlying
Hole is corresponding.
Existing equipment can only be punched out to single corner brace section bar, and small-sized movable corner connectors are provided with its convex limb bottom
Slide plate, the opening portion of convex limb bottom is blocked to facilitate the punching press of punch mechanism by special mould block, but
For large-scale movable corner connectors, on the premise of its bulk strength is kept, its convex limb bottom does not set slide plate, and therefore, traditional rushes
Holes mechanism can not offset applied stress caused by punching using special block, i.e., easily cause section bar processing when by
Damage, and then increase the scrappage of section bar；On the other hand, applicant by making improvement to existing equipment, can be carried out two section bars
Merge to realize synchronous drilling and cutting, to realize the maximization of processing efficiency.Further, two corner brace section bars and discharge
Put, and two recessed limbs of two corner brace section bars are distributed in both sides so that two corner brace section bars are temporarily forming an entirety, i.e. section bar
Group, after section bar group is transferred into borehole drill construction, by borehole drill construction the both sides of section bar group are attached with the brill of hole and circular hole
Enter, due to using drilling mode, rather than impact style so that either large-scale corner brace section bar or small-sized corner brace section bar,
Applied stress caused by punching press is much smaller than in applied stress caused by drilling, that is, ensures that the corner brace section bar of all kinds of models is equal
It can be processed, to improve the use range of processing unit (plant).
Specifically, the recessed limb of two corner brace section bars is located at both sides respectively during drilling, and convex limb is then located at middle part, in rectangular channel
Two lower rigs be inclined on the hypotenuse of right angle trigonometry frame, with the corresponding connecting hole processed on two recessed limbs, in U-shaped branch
The convex limb of fixed upper rig face corner brace section bar on frame, and two bits are provided with upper rig, it is poor according to the model of section bar
It is different, the drilling that matched drill bit to carry out two convex limbs circular hole may be selected, wherein lower rig can be by upper top gas cylinder
Drive and occur along the upward displacement of hypotenuse, and upper rig can be driven by lower air cylinder and position vertically downwards occurs
Move, to complete the drilling operating to section bar group.Further to improve stability of the section bar group in drilling, applicant is in U-shaped branch
About two stacked fastening blocks are provided with frame, while side pressure cylinder is respectively fixed with two madial walls of U-bracket, two
The output end of individual side pressure cylinder is connected with fastening block both ends above, i.e., before being processed to circular hole, side pressure cylinder drives position
Fastening block in top is displaced downwardly to the upper surface compression of section bar group, then starts lower air cylinder so that the drill bit on bit passes through
Acted directly on after reach through hole on the convex limb of corner brace section bar, now section bar group realizes 2 points of clampings, avoids drilling hour angle pattern
Because of the influence of interaction force slight displacement occurs for material.
Be provided with screw on two right angled triangle framves, longitudinal screw mandrel successively activity through workbench side wall with
And two screws.During actual processing, by setting longitudinal screw mandrel so that two right angled triangle framves can on sliding block
Realize and move back and forth, to realize the exchange of lower rig station, it is ensured that the drill bit of lower rig and the processing stations phase on corner brace section bar
Matching, to improve machining accuracy.
The slide rail in horizontality is provided with the U-bracket side wall, vertical slide is slidably arranged on slide rail, institute
Lower air cylinder is stated to be fixed on vertical slide；Rectangular channel is provided with the middle part of the workbench, sliding block is provided with the rectangular channel,
The right-angle side of two right angled triangle framves is slidably arranged on sliding block.Vertical slide can realize horizontal reciprocating on slide rail
Motion, and right angled triangle frame can equally realize horizontal reciprocating movement on sliding block, i.e., can adjust as the case may be
The station of upper rig and two lower rigs, to ensure to be in optimal process station all the time in the station of upper rig and lower rig.
The axis tapped through hole parallel with slide rail is provided with the vertical slide, one end end activity of threaded rod is passed through
Coordinate after wearing the side wall of U-bracket with tapped through hole, the other end of threaded rod is fixed with handle.On the convex limb of diagonal pattern material
Circular hole when being crept into, the position adjustments of vertical slide, lower air cylinder and upper rig can be realized by rotational handle, with
Ensure that the station of the station and lower rig of upper rig matches.
Underlying described compact heap one end is provided with fastening cylinder, fastens and fastening is connected with the output end of cylinder
Plate, and limited block is provided with the compact heap other end above, formed between the limited block and fastening plates and supply two
The passage that section bar passes through.Fastening cylinder and limited block are set respectively in underlying compact heap both sides so that borehole drill construction
It is consistent with feeding mechanism, two end faces and the both sides up and down of section bar group can be fixed, to prevent two side by side
Corner brace section bar produces displacement because of interaction force.
The utility model compared with prior art, has the following advantages and advantages：
1st, a kind of special-shaped movable corner connectors sectional material drilling machine structure of the utility model, two corner brace section bars are placed side by side, and two
Two recessed limbs of corner brace section bar are distributed in both sides so that two corner brace section bars are temporarily forming an entirety, i.e. section bar group, work as section bar
After group is transferred into borehole drill construction, by borehole drill construction the both sides of section bar group are attached with the drilling of hole and circular hole, due to adopting
With drilling mode, rather than impact style so that either large-scale corner brace section bar or small-sized corner brace section bar, produced in drilling
Raw applied stress is much smaller than applied stress caused by punching press, that is, ensures that the corner brace section bar of all kinds of models can be added
Work, to improve the use range of processing unit (plant)；
2nd, a kind of special-shaped movable corner connectors sectional material drilling machine structure of the utility model, the circular hole on the convex limb of diagonal pattern material enter
During row drilling, the position adjustments of vertical slide, lower air cylinder and upper rig can be realized by rotational handle, to ensure upper brill
The station of the station of machine and lower rig matches；
3rd, a kind of special-shaped movable corner connectors sectional material drilling machine structure of the utility model, sets respectively in underlying compact heap both sides
Put fastening cylinder and limited block so that borehole drill construction is consistent with feeding mechanism, can be to two end faces up and down of section bar group
And both sides are fixed, to prevent two corner brace section bars side by side from producing displacement because of interaction force.
4th, a kind of special-shaped movable corner connectors sectional material drilling machine structure of the utility model, because existing drilling technique can only be processed every time
A piece section bar, i.e. A section bars or Type B material, processing efficiency are relatively slow；And the utility model abnormity movable corner connectors borehole drill construction is each
Two section bars can be processed simultaneously, i.e. A section bars and Type B material is together processed, so processing efficiency will double, so as to ensure that processing
Efficiency maximizes.
Brief description of the drawings
Accompanying drawing described herein is used for providing further understanding the utility model embodiment, forms the one of the application
Part, the restriction to the utility model embodiment is not formed.In the accompanying drawings：
Fig. 1 is structural representation of the present utility model；
Placement location schematic diagram when Fig. 2 is two corner brace section bar chargings；
Fig. 3 is the structural representation of small-sized movable corner connectors；
Fig. 4 is the structural representation of large-scale activity corner brace.
Mark and corresponding parts title in accompanying drawing：
1- workbench, 2-U shapes support, 3- handles, 4- limited blocks, 5- side pressures cylinder, 6- section bars, 7- threaded rods, 8- are vertical
The upper rig of slide, 9-, 10- lower air cylinders, 11- slide rails, 12- sliding blocks, 13- bits, 14- compact heaps, 15- fastenings cylinder, 16-
Lower drilling machine, 17- right angled triangles frame, the upper top gas cylinders of 18-, 19- longitudinal screw mandrels, the convex limbs of 20-, the recessed limbs of 21-, 22- bolts, 23-
Locating dowel, 24- slide plates.
Embodiment
For the purpose of this utility model, technical scheme and advantage is more clearly understood, with reference to embodiment and accompanying drawing,
The utility model is described in further detail, and exemplary embodiment of the present utility model and its explanation are only used for explaining this
Utility model, it is not intended as to restriction of the present utility model.
Embodiment 1
As depicted in figs. 1 and 2, the present embodiment includes workbench 1, on the workbench 1 be provided with two side pressure cylinders 5,
Two right angled triangle framves 17, lower air cylinder 10, two are in the compact heap 14 being spaced apart, be open face feeding mechanism exporter
To U-bracket 2, through hole is provided with the middle part of compact heap 14, two side pressure cylinders 5 are fixed on the inwall of U-bracket 2 and positioned at pressure
The top of tight block 14, the output end of two side pressure cylinders 5 is connected with the both ends of compact heap 14 above respectively, underlying
Compact heap 14 is fixed on the bottom of U-bracket 2, and the slide rail 11 in horizontality is provided with U-bracket side wall, vertical sliding
Seat 8 is slidably arranged on slide rail 11, and the lower air cylinder is fixed on the madial wall of U-bracket, and in the output of lower air cylinder
End is fixed with drilling machine, and upper drilling machine is provided with the bit 13 of two face through holes, and two right angled triangle framves 17 is oblique
Top gas cylinder 18 is mounted on side, and lower drilling machine 16 is provided with the output end of upper top gas cylinder 18, two lower drilling machines
16 drill bit is close to each other and corresponding with underlying through hole.
Existing equipment can only be punched out to single corner brace section bar 6, and small-sized movable corner connectors are in its convex bottom of limb 20
Provided with slide plate 24, the opening portion of the convex bottom of limb 20 is blocked to facilitate rushing for punch mechanism by special mould block
Pressure, but for large-scale movable corner connectors, on the premise of its bulk strength is kept, its convex bottom of limb 20 does not set slide plate 24, because
This, traditional punch mechanism can not offset applied stress caused by punching using special block, i.e., easily cause section bar 6
It is damaged in processing, and then increases the scrappage of section bar 6；On the other hand, applicant is by making improvement to existing equipment, can be by two
Individual section bar 6 is merged to realize synchronous drilling and cutting, to realize the maximization of processing efficiency.Further, two angles
Pattern material 6 is placed side by side, and two recessed limbs 21 of two corner brace section bars 6 are distributed in both sides so that two 6 temporary transient shapes of corner brace section bar
Into an entirety, i.e. section bar group, after section bar group is transferred into borehole drill construction, the both sides of section bar group are connected by borehole drill construction
The drilling of hole and circular hole is connect, due to using drilling mode, rather than impact style so that either large-scale corner brace section bar 6 is also
It is small-sized corner brace section bar 6, applied stress caused by punching press is much smaller than in applied stress caused by drilling, that is, ensures each
The corner brace section bar 6 of style number can be processed, to improve the use range of processing unit (plant).
Specifically, the recessed limb 21 of two corner brace section bars 6 is located at both sides respectively during drilling, and convex limb 20 is then located at middle part, square
Two lower rigs in shape groove are inclined on the hypotenuse of right angle trigonometry frame, with the corresponding connection processed on two recessed limbs 21
Hole, the convex limb 20 of the fixed face corner brace section bar 6 of upper rig 9 on U-bracket 2, and two bits are provided with upper rig 9
13, according to the model difference of section bar 6, the drilling that matched drill bit to carry out two convex limbs 20 circular hole may be selected, its
In lower rig can be driven and occurred along the upward displacement of hypotenuse by upper top gas cylinder 18, and upper rig 9 can be by lower air cylinder 10
Drive and displacement vertically downwards occurs, to complete the drilling operating to section bar group.Exist further to improve section bar group
Stability during drilling, applicant are provided with about two stacked fastening blocks in U-bracket 2, while the two of U-bracket 2
Side pressure cylinder 5 is respectively fixed with individual madial wall, the output end of two side pressure cylinders 5 connects with fastening block both ends above
Connect, i.e., before being processed to circular hole, side pressure cylinder 5 drives fastening block above to be displaced downwardly to the upper surface compression of section bar group,
Then lower air cylinder 10 is started so that the drill bit on bit 13 is acted directly on the convex limb 20 of corner brace section bar 6 after running through through hole,
Now section bar group realizes 2 points of clampings, avoids drilling hour angle pattern material 6 and slight displacement occurs because of the influence of interaction force.
Further, screw is provided with two right angled triangle framves 17, activity runs through longitudinal screw mandrel 19 successively
The side wall of workbench 1 and two screws.During actual processing, by setting longitudinal screw mandrel 19 so that two right angles three
Angular frame 17 can realize reciprocating motion on sliding block 12, to realize the exchange of lower rig station, it is ensured that the drill bit of lower rig with
Processing stations on corner brace section bar 6 match, to improve machining accuracy.
Further, the slide rail 11 in horizontality is provided with the U-bracket side wall, vertical slide 8 is slided and set
Put on slide rail 11, the lower air cylinder is fixed on vertical slide 8；Rectangular channel is provided with the middle part of workbench 1, described
Sliding block 12 is provided with rectangular channel, the right-angle side of two right angled triangle framves 17 is slidably arranged on sliding block 12.Vertical slide 8
Horizontal reciprocating movement can be realized on slide rail 11, and right angled triangle frame 17 equally can realize horizontal reciprocating on sliding block 12
Motion, i.e., can adjust the station of upper rig 9 and two lower rigs as the case may be, with ensure upper rig 9 and under
The station of rig is in optimal process station all the time.
Further, the axis tapped through hole parallel with slide rail 11 is provided with the vertical slide 8, threaded rod 7
The activity of one end end coordinates after the side wall of U-bracket 2 with tapped through hole, and the other end of threaded rod 7 is fixed with handle 3.
When circular hole on the convex limb 20 of diagonal pattern material 6 is crept into, vertical slide 8, lower air cylinder can be realized by rotational handle 3
10 and the position adjustments of upper rig 9, to ensure that the station of the station of upper rig 9 and lower rig matches.
Further, fastening cylinder 15 is provided with underlying described one end of compact heap 14, fastens the defeated of cylinder 15
Go out on end and be connected with fastening plates, and be provided with limited block 4 in the other end of the compact heap 14 above, the limited block 4 and
The passage passed through for two section bars 6 is formed between fastening plates.In the underlying both sides of compact heap 14, fastening cylinder is set respectively
15 and limited block 4 so that borehole drill construction is consistent with feeding mechanism, can be to two end faces and the both sides up and down of section bar group
It is fixed, to prevent two corner brace section bars 6 side by side from producing displacement because of interaction force.
Above-described embodiment, the purpose of this utility model, technical scheme and beneficial effect are entered
One step describes in detail, should be understood that and the foregoing is only specific embodiment of the present utility model, is not used to limit
Determine the scope of protection of the utility model, it is all within the spirit and principles of the utility model, any modification for being made, equally replace
Change, improve, should be included within the scope of protection of the utility model.
Claims (5)
1. a kind of special-shaped movable corner connectors sectional material drilling machine structure, including workbench (1), it is characterised in that：Set in the workbench (1)
It is equipped with two side pressure cylinders (5), two right angled triangle framves (17), lower air cylinder (10), two in the compact heap that is spaced apart
(14), the U-bracket (2) of opening face feeding mechanism export direction, through hole, two side pressure gas are provided with the middle part of compact heap (14)
Cylinder (5) is fixed on U-bracket (2) inwall and positioned at the top of compact heap (14), the output end difference of two side pressure cylinders (5)
It is connected with compact heap (14) both ends above, underlying compact heap (14) is fixed on the bottom of U-bracket (2), institute
State lower air cylinder (10) to be fixed in the side wall of U-bracket (2), and upper drilling machine is fixed with the output end of lower air cylinder (10)
(9), upper drilling machine (9) is provided with the bit (13) of two face through holes, and on the hypotenuse of two right angled triangle framves (17)
Top gas cylinder (18) is installed, and lower drilling machine (16), two lower drilling machines are provided with the output end of upper top gas cylinder (18)
(16) drill bit is close to each other and corresponding with underlying through hole.
A kind of 2. special-shaped movable corner connectors sectional material drilling machine structure according to claim 1, it is characterised in that：It is described straight at two
It is provided with screw on angle triangle frame (17), activity runs through the side wall and two spiral shells of workbench (1) to longitudinal screw mandrel (19) successively
Hole.
A kind of 3. special-shaped movable corner connectors sectional material drilling machine structure according to claim 1 or 2, it is characterised in that：In the U-shaped
Support (2) side wall is provided with the slide rail (11) in horizontality, and vertical slide (8) is slidably arranged on slide rail (11), described
Lower air cylinder (10) is fixed on vertical slide (8)；Rectangular channel is provided with the middle part of the workbench (1), in the rectangular channel
Provided with sliding block (12), the right-angle side of two right angled triangle framves (17) is slidably arranged on sliding block (12).
A kind of 4. special-shaped movable corner connectors sectional material drilling machine structure according to claim 3, it is characterised in that：Described vertical sliding
The axis tapped through hole parallel with slide rail (11) is provided with seat (8), one end end activity of threaded rod (7) runs through U-bracket
(2) coordinate after side wall with tapped through hole, the other end of threaded rod (7) is fixed with handle (3).
A kind of 5. special-shaped movable corner connectors sectional material drilling machine structure according to claim 1, it is characterised in that：Underlying
Described compact heap (14) one end is provided with fastening cylinder (15), fastens and fastening plates are connected with the output end of cylinder (15), and
The compact heap (14) other end above is provided with limited block (4), and the limited block (4) is formed between fastening plates for two
The passage that individual section bar (6) passes through.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720379732.5U CN206689478U (en) | 2017-04-12 | 2017-04-12 | A kind of special-shaped movable corner connectors sectional material drilling machine structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720379732.5U CN206689478U (en) | 2017-04-12 | 2017-04-12 | A kind of special-shaped movable corner connectors sectional material drilling machine structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206689478U true CN206689478U (en) | 2017-12-01 |
Family
ID=60442047
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720379732.5U Expired - Fee Related CN206689478U (en) | 2017-04-12 | 2017-04-12 | A kind of special-shaped movable corner connectors sectional material drilling machine structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206689478U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111215949A (en) * | 2020-02-15 | 2020-06-02 | 吴光辉 | Automatic drilling machine for angle folding groove angle code cross double-shaft tapping position jacking propulsion |
-
2017
- 2017-04-12 CN CN201720379732.5U patent/CN206689478U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111215949A (en) * | 2020-02-15 | 2020-06-02 | 吴光辉 | Automatic drilling machine for angle folding groove angle code cross double-shaft tapping position jacking propulsion |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20171201 Termination date: 20190412 |