CN203091858U - Vertical internal broaching machine - Google Patents
Vertical internal broaching machine Download PDFInfo
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- CN203091858U CN203091858U CN 201220727407 CN201220727407U CN203091858U CN 203091858 U CN203091858 U CN 203091858U CN 201220727407 CN201220727407 CN 201220727407 CN 201220727407 U CN201220727407 U CN 201220727407U CN 203091858 U CN203091858 U CN 203091858U
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- broaching machine
- workbench
- lathe bed
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Abstract
The utility model relates to a vertical internal broaching machine which is characterized by comprising a vertical machine body. Linear guide ways are arranged on the front face of the machine body, a slide board is connected between the linear guide ways in a sliding mode, a workbench driven by an automatic electric elevator mechanism is mounted on the slide board, an atomization and cooling device, an automatic unloading mechanism and an automatic spraying and cleaning mechanism are mounted on the workbench, a pull broach lifting device and a pull broach clamping device are mounted at the upper end and the lower end of the machine body. The workbench moves relative to a pull broach driven by the automatic electric elevator mechanism, and thus a workpiece is cut. Cutting and atomizing motion, unloading motion and cleaning motion are performed automatically by the atomization and cooling device, the automatic unloading device and the automatic spraying and cleaning mechanism in the cutting process, mechanical arms for picking and placing workpieces are arranged correspondingly, and thus the purposes of realizing continuous production, liberating workforce and improving production efficiency are achieved. When the broaching machine is operated, no hydraulic pressure station is needed, and hydraulic oil pollution does not exist. The vertical internal broaching machine is small in size, low in energy consumption, high in machining precision, reasonable in layout among each parts, compact in structure and small in occupied area.
Description
Technical field
The utility model relates to a kind of vertical internal broaching machine, particularly a kind of compact conformation, machining accuracy height and the high vertical internal broaching machine of working (machining) efficiency.
Background technology
Broaching machine is with the lathe of the various inside and outside profiled surfaces of broaching tool processing work, can obtain high dimension precision and less surface roughness, and the productivity ratio height is applicable in batch and produces in a large number.Press the finished surface difference, broaching machine can be divided into internal broacher and external broaching machine, and internal broacher is used to the inner surface of broaching, and as splined hole, square hole etc., external broaching machine is used for surface broaching.Broaching machine is by overall structure and distribution form, is divided into horizontally and vertical, and the former application is more general, but the machining large workpiece, and floor space is bigger; Though latter's floor space is less, broach travel is restricted.
Present vertical internal broaching machine adopts hydraulic cylinder or motor to cooperate screw pair as driving power, and hydraulic cylinder power height can be suitable for the processing of large-scale workpiece, but power consumption is high, and has hydraulic oil pollution; Simultaneously, because the characteristic of hydraulic system, shake appears in broaching tool when contact workpiece, influences the precision and the roughness of workpiece.The mechanical type broaching machine utilizes the Motor Drive screw mandrel to rotate, and makes the slide that cooperates with wire rod thread move axially along screw mandrel and realizes processing.It has the higher processing precision height than hydraulic-driven, and it is low to consume energy.But during cutting, the chip that workpiece produces may be splashed on the screw mandrel, thereby quickens the screw mandrel wearing and tearing, and service life is low, still can influence machining accuracy.
In process, pickup and the cleaning of workpiece, workbench all adopted manually operation, pickup is highly higher, and labor strength is big, inefficiency, and have certain potential safety hazard, automaticity is low, is unfavorable for realizing automated production.
Summary of the invention
The technical problems to be solved in the utility model provides a kind of compact conformation, machining accuracy height and the high vertical internal broaching machine of working (machining) efficiency.
For solving the problems of the technologies described above, the technical solution of the utility model is: a kind of vertical internal broaching machine, its innovative point is: comprise a vertical lathe bed, this lathe bed is installed in the enclosure, the lathe bed front is provided with the line slideway that a pair of vertical direction is extended, between the described line slideway by the slide carriage that is slidingly connected, installment work platform on the slide carriage, workbench is driven along the line slideway lifting by the electric lifting mechanism that is installed in the lathe bed, and atomizing cooling device, Automatic Charging Device and automatic spray wiper mechanism are installed on the described workbench; The upper and lower end of lathe bed be positioned at respectively directly over the workbench and under broaching tool lowering or hoisting gear, broaching tool clamping device; The back side of lathe bed is fixed with support, and cradle back is installed distribution box, and cantilever tip connects rotating cantilever, and the cantilever other end connects control cabinet; The lathe bed lowermost end is provided with tank for coolant, and the electromagnetic type Scrap-removing machine is set in the tank for coolant, and the outlet of Scrap-removing machine is positioned at the back side of lathe bed.
Further, the main body of described lathe bed is fixedly formed by the side plate welding by vertical direction distribution and horizontally disposed several layers V-arrangement floor both sides; The leading flank of described V-arrangement floor has V-shaped groove, and ball screw is arranged in this groove.
Further, the front end face of described shell is provided with dodge gate, and described dodge gate middle part is provided with and picks and places the part automatically-controlled door, and the dodge gate upper and lower part is provided with visual window respectively; Two upper lateral parts of described shell are provided with visual window equally, and the bottom of shell both sides is installed window by side door detachable side door is installed.
Further, the top of described detachable side door is provided with portable groove, and the bottom is provided with visual window.
Further, the syndeton that described detachable side door and side door are installed window is: the four limit inner side edges that side door is installed window all are welded with postive stop baffle, the height of detachable side door is slightly less than the top margin postive stop baffle and apart from side door the vertical height on window base is installed, and is slightly larger than the base postive stop baffle is installed the window top margin apart from side door vertical height.
Further, described electric lifting mechanism comprises reducing motor, ball screw, shaft coupling and bearing bearing assembly, ball screw vertically is provided with, the screw mandrel upper end of ball screw is connected with the reducing motor that is installed in the lathe bed upper end by shaft coupling, the screw mandrel lower end of ball screw is connected with the bearing bearing assembly that the lathe bed lower end is installed, and the nut and the slide carriage of ball screw are fixed.
Further, the screw mandrel part that is positioned at the nut upper and lower in the described ball screw all is set with automatic telescopic protective sleeve.
Further, the compression spring of described automatic telescopic protective sleeve for reeling twist and make by spring leaf, and be close to mutually between the adjacent inside and outside circle of spring leaf.
Further, described Automatic Charging Device comprises and is arranged on the tool that connects material that workbench one side is used for depositing workpiece temporarily; And be arranged on the workbench opposite side and be used for workpiece push to the to connect material pusher of tool.
Further, the described tool that connects material comprise at least two parallel and be tilted to down the supporting rib that is provided with, the bending that makes progress of the front end of supporting rib constitutes spacingly, the supporting rib both sides are provided with limiting plate.
Further, described pusher comprises cylinder mounting plate, pusher cylinder, connecting plate, charging ram and expeller, cylinder mounting plate is installed on the workbench, the cylinder body of pusher cylinder is installed on the described cylinder mounting plate, the piston rod end of described pusher cylinder connects charging ram by connecting plate, and expeller is installed in going up of charging ram.
Further, the pusher guiding mechanism is set between described cylinder mounting plate and the connecting plate, described pusher guiding mechanism comprises guided bearing cover and guide pillar, the guided bearing cover is installed on the cylinder mounting plate, one end and the connecting plate of guide pillar are fixed, the guide pillar other end pass with its guided bearing that is slidingly matched cover after be connected guide and limit.
Further, described automatic spray wiper mechanism comprises conversion block, air inlet pipe, first air jet pipe and second air jet pipe, on the described workbench conversion block is installed, connects air inlet pipe, first air jet pipe and second air jet pipe on the described conversion block simultaneously, described air inlet pipe is communicated with compressed air source.
Advantage of the present utility model is: switch the position by broaching tool lowering or hoisting gear, broaching tool clamping device control broaching tool, utilizes electric lifting mechanism driving workbench and broaching tool to relatively move and realize cutting; And in working angles, automatically perform corresponding cutting spraying, discharging, cleaning action by mechanisms such as atomizing cooling device, Automatic Charging Device and automatic spray wiper mechanisms, and can corresponding preparation pick and place the part manipulator, thereby realize automatic continuous production, the liberation labour enhances productivity.Need not Hydraulic Station during broaching machine work, do not have hydraulic oil pollution, volume is little, and it is low to consume energy, the machining accuracy height; Rationally distributed between each parts, compact conformation, floor space is little.
The nut of ball screw is in lifting process; the spring leaf of automatic telescopic protective sleeve shrinks thereupon or stretches out; the screw mandrel of its upper and lower is covered with spring leaf outward all the time; and owing to be close to mutually between the adjacent inside and outside circle of spring leaf; thereby chip when avoiding cutting and cooling fluid are splashed to and quicken the screw mandrel wearing and tearing on the screw mandrel; improve the leading screw working environment, prolonged the service life of ball screw, and guarantee the precision of processing.
The tower structure that lathe bed adopts multilayer V-arrangement floor and side plate to be welded, intensity height, consumptive material are few, and the ball screw of electric lifting mechanism places in the V-shaped groove of V-arrangement floor, make structure compactness more.The dodge gate middle part is provided with and picks and places the part automatically-controlled door, and need not to open whole dodge gate can carry out, and visual window can make things convenient for the duty of understanding immediately in the broaching machine, guarantees the normal operation of broaching machine.Shell two side lower parts are provided with detachable side door, can be connected interface and space for realizing that automatic continuous production provides after the dismounting.
Utilize discharging and cleaning after Automatic Charging Device and automatic spray wiper mechanism are finished the workpiece cutting, reduce labor intensity of operating staff, increase work efficiency, safe and reliable.
Description of drawings
Fig. 1 is a vertical internal broaching machine structural representation in the utility model.
Fig. 2 is the utility model medial bed front view.
Fig. 3 is the utility model medial bed vertical view.
Fig. 4 is the utility model vertical broaching machine shell mechanism schematic diagram.
Fig. 5 is the utility model lathe bed and electric lifting mechanism structural representation.
Fig. 6 is an automatic telescopic protective sleeve front view in the utility model.
Fig. 7 is an automatic telescopic protective sleeve vertical view in the utility model.
Fig. 8 is Automatic Charging Device and an automatic spray wiper mechanism structural representation in the utility model.
The specific embodiment
As shown in Figure 1, comprise lathe bed 1, shell 2, workbench 3, electric lifting mechanism 4, atomizing cooling device 5, Automatic Charging Device 6, automatic spray wiper mechanism 7, broaching tool lowering or hoisting gear 8, broaching tool clamping device 9, support 10, distribution box 11, cantilever 12, control cabinet 13, tank for coolant 14 and broaching tool 15.
Above-mentioned vertical lathe bed 1 is installed in the shell 2, and lathe bed 1 front is provided with the line slideway that a pair of vertical direction is extended, between the line slideway by the slide carriage that is slidingly connected, installment work platform 3 on the slide carriage, the upper surface of workbench 3 is provided with the standard station in band broaching tool hole.Workbench 3 is driven along the line slideway lifting by the electric lifting mechanism 4 that is installed in the lathe bed 1, and atomizing cooling device 5, Automatic Charging Device 6 and automatic spray wiper mechanism 7 are installed on workbench 3.Wherein, atomizing cooling device 5 can move in the vertical direction near or away from the standard station of workbench 3.
The upper and lower end of lathe bed 1 be positioned at respectively directly over the workbench 3 and under broaching tool lowering or hoisting gear 8, broaching tool clamping device 9, broaching tool lowering or hoisting gear 8, broaching tool clamping device 9 are the structure of known technology in the present broaching machine, repeat no more here.The back side of lathe bed is fixed with support 10, and distribution box 11 is installed at support 10 back sides, and support 10 tops connect rotating cantilever 12, and cantilever 12 other ends connect control cabinet 13; Lathe bed 1 lowermost end is provided with tank for coolant 14, and electromagnetic type Scrap-removing machine 15 is set in the tank for coolant 14, and the outlet of Scrap-removing machine 15 is positioned at the back side of lathe bed 1.
Shown in Fig. 2,3, the main body of medial bed 1 of the present invention is distributed by vertical direction and horizontally disposed several layers V-arrangement floor 11 both sides fixedly form by side plate 12 welding; The leading flank of V-arrangement floor 11 has V-shaped groove.
As shown in Figure 4, the front end face of shell 2 is provided with dodge gate 22, and a side and the shell 2 of dodge gate 22 are hinged, and opposite side is installed speeder wrench 23, and shell 2 opposite sides are installed the snap close 24 corresponding with speeder wrench 23.Dodge gate 22 middle parts are provided with and pick and place part automatically-controlled door 25, and dodge gate 22 upper and lower parts are provided with visual window 26 respectively.Two upper lateral parts of shell 2 are provided with visual window 27 equally, and the bottom of shell 2 both sides is installed window by side door detachable side door 28 is installed.The top of detachable side door 28 is provided with portable groove, and the bottom is provided with visual window.
As shown in Figure 5, electric lifting mechanism 4 comprises reducing motor 41, ball screw 42, shaft coupling 43 and bearing bearing assembly 44, ball screw 42 vertically is arranged in the V-shaped groove of V floor 11 in the lathe bed 1, the screw mandrel upper end of ball screw 42 is connected with the reducing motor 41 that is installed in lathe bed 1 upper end by shaft coupling 45, the screw mandrel lower end of ball screw 42 is connected with the bearing bearing assembly 44 that lathe bed 1 lower end is installed, and the nut and the slide carriage of ball screw 42 are fixed.Reducing motor 41 is a variable ratio frequency changer speed governing reducing motor.
As Fig. 5,6,7; the screw mandrel part that is positioned at the nut upper and lower in the ball screw 42 all is set with automatic telescopic protective sleeve 45; the compression spring of this automatic telescopic protective sleeve 45 for reeling twist and make by spring leaf, and be close to mutually between the adjacent inside and outside circle of spring leaf.
As shown in Figure 8, Automatic Charging Device 6 comprises the tool that connects material that is arranged on workbench 3 one sides, and is arranged on workbench 3 opposite sides and is used for workpiece push to the to connect material pusher of tool.
The tool that connects material is used for depositing workpiece temporarily, it comprise at least two parallel and be tilted to down the supporting rib 61 that is provided with, the bending that makes progress of the front end of supporting rib 61 constitutes spacingly, supporting rib 61 both sides are provided with limiting plate 62.Pusher comprises cylinder mounting plate 63, pusher cylinder 64, connecting plate 65, charging ram 66 and expeller 67, cylinder mounting plate 63 is installed on the workbench 3, the cylinder body of pusher cylinder 64 is installed on the cylinder mounting plate 63, the piston rod end of pusher cylinder 64 connects charging ram 66 by connecting plate 65, be positioned at the expeller 67 of standard station one side on the charging ram 66, expeller 67 has V-shaped groove towards the side of standard station.
Between cylinder mounting plate 63 and connecting plate 65, the pusher guiding mechanism is set also, the pusher guiding mechanism comprises guided bearing cover 68 and guide pillar 69, guided bearing cover 68 is installed on the cylinder mounting plate 63, one end of guide pillar 69 and connecting plate 65 is fixing, guide pillar 69 other ends pass with its guided bearing that is slidingly matched cover 68 after be connected guide and limit 610.
Automatic spray wiper mechanism 7 comprises conversion block 71, air inlet pipe 72, first air jet pipe 73 and second air jet pipe 74, conversion block 71 is installed on the workbench 3, can connect air inlet pipe 72, first air jet pipe 73 and second air jet pipe 74 simultaneously by joint on the conversion block 71, air inlet pipe 72 is communicated with compressed air source.When first jet pipe 73 is connected with conversion block 71 with second jet pipe 74, adopt L shaped pipe joint 75 to connect, can utilize the spout alignment fiducials platform of L shaped pipe joint 75 with first air jet pipe 73 in installation process, the spout of second air jet pipe 74 is aimed at the tool that connects material.And on first air jet pipe 73 and second air jet pipe 74, flow control valve 76 is installed all.
The operation principle of the automatic cutting workpiece of broaching machine is among the present invention:
Original state: workbench 3 is positioned at the bottom lower limit of lathe bed 1, and the upper end of broaching tool 15 is clamped by broaching tool lowering or hoisting gear 8, and broaching tool lowering or hoisting gear 8 is positioned at upper limit, makes the lower end of broaching tool 15 exceed workbench 3; Broaching tool clamping device 9 is in releasing orientation;
Cutting state: workpiece is placed on the standard station of workbench 3, atomizing cooling device 5 comes downwards to workpiece top, but contact workpiece not; Broaching tool 15 is driven descending by broaching tool lowering or hoisting gear 8, after broaching tool 15 lower ends are clamped by broaching tool clamping device 9, and horizontal reset on the broaching tool lowering or hoisting gear 8; Electric lifting mechanism 4 driving workbench 3 vertically rise then, and workpiece moves axially along broaching tool 15, realizes the cutting of workpiece; Move past in the journey on workbench 3,5 work of atomizing cooling device to cutting place ejection water-soluble metalworking liquid, improve cutting quality;
The cutting completion status: after moving to the upper limit on lathe bed 1 top on the workbench 3, workpiece is higher than broaching tool 15 tops, and atomizing cooling device 5 rises away from standard station, and the pusher of being incited somebody to action by Automatic Charging Device 6 pushes workpiece in the tool that connects material;
Reset mode: electric lifting mechanism 4 drives workbench 3 and moves down, in this folding process, automatic spray wiper mechanism 7 is simultaneously to the spray of the workpiece in the standard station on the workbench 3 and the tool that connects material compressed air, clean its surface, simultaneously, 5 pairs of broaching tool 15 surface spray of atomizing cooling device clean broaching tool; When workbench 3 to lower limit, broaching tool lowering or hoisting gear 8 is descending, and clamps broaching tool upper end, after broaching tool clamping device 9 sent out, it is up that broaching tool lowering or hoisting gear 8 drives broaching tools 15, each parts is got back to original state, finishes a process cycles.
Claims (13)
1. vertical internal broaching machine, it is characterized in that: comprise a vertical lathe bed, this lathe bed is installed in the enclosure, the lathe bed front is provided with the line slideway that a pair of vertical direction is extended, between the described line slideway by the slide carriage that is slidingly connected, installment work platform on the slide carriage, workbench is driven along the line slideway lifting by the electric lifting mechanism that is installed in the lathe bed, and atomizing cooling device, Automatic Charging Device and automatic spray wiper mechanism are installed on the described workbench; The upper and lower end of lathe bed be positioned at respectively directly over the workbench and under broaching tool lowering or hoisting gear, broaching tool clamping device; The back side of lathe bed is fixed with support, and cradle back is installed distribution box, and cantilever tip connects rotating cantilever, and the cantilever other end connects control cabinet; The lathe bed lowermost end is provided with tank for coolant, and the electromagnetic type Scrap-removing machine is set in the tank for coolant, and the outlet of Scrap-removing machine is positioned at the back side of lathe bed.
2. vertical internal broaching machine according to claim 1 is characterized in that: the main body of described lathe bed is distributed by vertical direction and horizontally disposed several layers V-arrangement floor both sides fixedly form by the side plate welding; The leading flank of described V-arrangement floor has V-shaped groove, and ball screw is arranged in this groove.
3. vertical internal broaching machine according to claim 1 is characterized in that: the front end face of described shell is provided with dodge gate, and described dodge gate middle part is provided with and picks and places the part automatically-controlled door, and the dodge gate upper and lower part is provided with visual window respectively; Two upper lateral parts of described shell are provided with visual window equally, and the bottom of shell both sides is installed window by side door detachable side door is installed.
4. vertical broaching machine shell according to claim 3 is characterized in that: the top of described detachable side door is provided with portable groove, and the bottom is provided with visual window.
5. vertical broaching machine shell according to claim 3, it is characterized in that: the syndeton that described detachable side door and side door are installed window is: the four limit inner side edges that side door is installed window all are welded with postive stop baffle, the height of detachable side door is slightly less than the top margin postive stop baffle and apart from side door the vertical height on window base is installed, and is slightly larger than the base postive stop baffle is installed the window top margin apart from side door vertical height.
6. vertical internal broaching machine according to claim 1, it is characterized in that: described electric lifting mechanism comprises reducing motor, ball screw, shaft coupling and bearing bearing assembly, ball screw vertically is provided with, the screw mandrel upper end of ball screw is connected with the reducing motor that is installed in the lathe bed upper end by shaft coupling, the screw mandrel lower end of ball screw is connected with the bearing bearing assembly that the lathe bed lower end is installed, and the nut and the slide carriage of ball screw are fixed.
7. vertical internal broaching machine according to claim 6 is characterized in that: the screw mandrel part that is positioned at the nut upper and lower in the described ball screw all is set with automatic telescopic protective sleeve.
8. vertical internal broaching machine according to claim 7 is characterized in that: the compression spring of described automatic telescopic protective sleeve for reeling twist and make by spring leaf, and be close to mutually between the adjacent inside and outside circle of spring leaf.
9. vertical internal broaching machine according to claim 1 is characterized in that: described Automatic Charging Device comprises and is arranged on the tool that connects material that workbench one side is used for depositing workpiece temporarily; And be arranged on the workbench opposite side and be used for workpiece push to the to connect material pusher of tool.
10. vertical internal broaching machine according to claim 9 is characterized in that: the described tool that connects material comprise at least two parallel and be tilted to down the supporting rib that is provided with, the bending that makes progress of the front end of supporting rib constitutes spacingly, the supporting rib both sides are provided with limiting plate.
11. vertical internal broaching machine according to claim 9, it is characterized in that: described pusher comprises cylinder mounting plate, pusher cylinder, connecting plate, charging ram and expeller, cylinder mounting plate is installed on the workbench, the cylinder body of pusher cylinder is installed on the described cylinder mounting plate, the piston rod end of described pusher cylinder connects charging ram by connecting plate, and expeller is installed in going up of charging ram.
12. vertical internal broaching machine according to claim 11, it is characterized in that: the pusher guiding mechanism is set between described cylinder mounting plate and the connecting plate, described pusher guiding mechanism comprises guided bearing cover and guide pillar, the guided bearing cover is installed on the cylinder mounting plate, one end and the connecting plate of guide pillar are fixed, the guide pillar other end pass with its guided bearing that is slidingly matched cover after be connected guide and limit.
13. vertical internal broaching machine according to claim 1, it is characterized in that: described automatic spray wiper mechanism comprises conversion block, air inlet pipe, first air jet pipe and second air jet pipe, on the described workbench conversion block is installed, connect air inlet pipe, first air jet pipe and second air jet pipe on the described conversion block simultaneously, described air inlet pipe is communicated with compressed air source.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220727407 CN203091858U (en) | 2012-07-04 | 2012-12-26 | Vertical internal broaching machine |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201220318959 | 2012-07-04 | ||
| CN201220318959.6 | 2012-07-04 | ||
| CN 201220727407 CN203091858U (en) | 2012-07-04 | 2012-12-26 | Vertical internal broaching machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203091858U true CN203091858U (en) | 2013-07-31 |
Family
ID=48843302
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220727407 Withdrawn - After Issue CN203091858U (en) | 2012-07-04 | 2012-12-26 | Vertical internal broaching machine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203091858U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103042269A (en) * | 2012-07-04 | 2013-04-17 | 南通新冯精密机械有限公司 | Vertical internal broaching machine |
| CN105382332A (en) * | 2014-08-22 | 2016-03-09 | 韩国拉床制造株式会社 | Sealling type vertical broaching machine |
| CN106493425A (en) * | 2016-12-26 | 2017-03-15 | 浙江畅尔智能装备股份有限公司 | Process the high speed internal broacher of hard tooth |
-
2012
- 2012-12-26 CN CN 201220727407 patent/CN203091858U/en not_active Withdrawn - After Issue
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103042269A (en) * | 2012-07-04 | 2013-04-17 | 南通新冯精密机械有限公司 | Vertical internal broaching machine |
| CN103042269B (en) * | 2012-07-04 | 2015-07-29 | 南通新冯精密机械有限公司 | A kind of vertical internal broaching machine |
| CN105382332A (en) * | 2014-08-22 | 2016-03-09 | 韩国拉床制造株式会社 | Sealling type vertical broaching machine |
| CN105382332B (en) * | 2014-08-22 | 2017-10-24 | 韩国拉床制造株式会社 | Closed type vertical broaching machine |
| CN106493425A (en) * | 2016-12-26 | 2017-03-15 | 浙江畅尔智能装备股份有限公司 | Process the high speed internal broacher of hard tooth |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20130731 Effective date of abandoning: 20150729 |
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| RGAV | Abandon patent right to avoid regrant |