CN205741120U - Band detection and the die press quenching machine tool of age of a draught animal stopping means - Google Patents
Band detection and the die press quenching machine tool of age of a draught animal stopping means Download PDFInfo
- Publication number
- CN205741120U CN205741120U CN201620653675.0U CN201620653675U CN205741120U CN 205741120 U CN205741120 U CN 205741120U CN 201620653675 U CN201620653675 U CN 201620653675U CN 205741120 U CN205741120 U CN 205741120U
- Authority
- CN
- China
- Prior art keywords
- ring
- age
- workpiece
- detection
- mold
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn - After Issue
Links
Landscapes
- Heat Treatment Of Articles (AREA)
Abstract
This utility model relates to a kind of quenching unit, the detection of a kind of band and the die press quenching machine tool of age of a draught animal stopping means, this lathe includes main engine bed, workbench, column, installation lower mold and the quenching oil cover being arranged on dynamic crossbeam on the table and is arranged on the mold in quenching oil cover, its feature is provided with ring-type inner cone and limited block guide holder in the workpiece age of a draught animal position of upper/lower die, is provided with limited block in limited block guide holder；Being provided with cylinder, workpiece detecting head and the position detecting switch of detection on column, detection switch is connected with the electric control system of die press quenching machine tool.This device can effectively control the deformation in quenching process of the workpiece age of a draught animal and raceway, it is effectively reduced workpiece and mold is not separated by the generation of badly damaged phenomenon of caused workpiece or even equipment, it is improved in workpiece the age of a draught animal, the deformation of raceway and axiality, effectively reduce the stock removal of post-production, improve working (machining) efficiency and the qualification rate of product.
Description
Art
This utility model relates to a kind of quenching unit, the detection of a kind of band and the die quenching machine of age of a draught animal stopping means
Bed.
Background technology
For needing to carry out the cover parts of Quenching Treatment in the high-volume course of processing, quenching heat treatment is to determine to produce
One of the critical process in quality, serviceability and life-span, quenching heat treatment operation belongs to hot-working, and unpredictable factor is very
Many, if the Internal and external cycle of railway bearing is during processing and manufacturing, before operation, process qualified product, in quenching process, pass through
Long-time at elevated temperature, the cooling rapidly during quenching, inevitably produce physical dimension and the change of shape, when deflection mistake
Time big, substantial amounts of defective work, rework rate and percent defective will be produced the highest.
At present for the heat treatment general die quenching special purpose machine tool of high-volume cover parts, in press, it is quenched part
Cooling procedure in, use be suitable for quenching mould can effectively stop part to shrink, Reducing distortion, it is ensured that the heat treatment of workpiece
Quality and dimensionally stable.
All railway bearing die quenching presses of current domestic online use, mainly control overcoat workpiece quenched
The deflection of raceway in journey, the age of a draught animal refers to the ring part that railway bearing overcoat end walls is relatively thin, and the deformation of the age of a draught animal is never
A kind of reasonably mechanism effectively controls, and starts to shrink at and hold mould tightly after workpiece quickly cools down in quenching process, due to
Thinner thickness at the age of a draught animal, first shrinks and puts in place, workpiece raceway and middle part is thicker does not seals, and may proceed to contract, in this part
In contraction process, can cause the age of a draught animal outer bulging deformation in various degree, the deflection causing age of a draught animal part is uncontrollable.
It is raceway due to the manufacturing procedure after traditional quenching i.e. grinding and the age of a draught animal is operation break-down processing, can make up
The age of a draught animal deforms the deficiency brought more greatly, but owing to needs are installed for twice and process, working (machining) efficiency is low.Along with enterprise intelligentization manufactures
The universal and raising of automaticity, overcoat workpiece is used raceway and grinding of the age of a draught animal to add by each railway bearing manufacturer
The intelligent grinding machine of work, if the deflection of the age of a draught animal is excessive, and and raceway concentricity can not matched, disposable mill will be given
Cut processing and bring the biggest problem, problems with can be produced: 1, the age of a draught animal or ball race grinding are not in place；2, deform relatively due to the age of a draught animal
Greatly, excessive in the change of the grinding process medium plain emery wheel depth of cut, make reduce rapidly or damage the service life of emery wheel；3, stock removal is uneven
Even, percent defective increases, and has a strong impact on production efficiency and the economic benefit of enterprise, and there is certain potential safety hazard.
And railway bearing die quenching press actually used during, overcoat workpiece after quenching completes sometimes
The situation having de-not die sinking occurs, i.e. workpiece and mould the most thoroughly separates.According to equipment die structural analysis, de-not die sinking
Situation has three kinds: one and is workpiece and upper/lower die is all not separated by, and now master cylinder rises and is obstructed, if after 3-5 second such as
The dynamic crossbeam of fruit is not subjected to displacement, and control system can send displacement delayed alarm；Two is workpiece and lower mold adhesion, in this feelings
Under condition, during discharging, input and output material mechanical hand can send crawl delayed alarm, if mechanical hand does not rise after i.e. 3-5 second, and explanation
Workpiece and lower mold do not disengage；Three is workpiece and mold adhesion, and this situation there is presently no preventive means and warning merit
Can, owing to whole quenching process is to carry out in the environment closed, therefore, this phenomenon is not easy to be found by operator, if
Workpiece adhere to the most be not found, when the next one circulation red heat workpiece put in place after, dynamic crossbeam still can automatically under
Fall, causes the badly damaged of workpiece or even equipment, directly influences production efficiency and the economic benefit of enterprise.
Summary of the invention
This utility model is the problem existed for above-mentioned overcoat workpiece die quenching equipment, it is provided that one can effectively control
The outer cover parts age of a draught animal deforms, and after can detecting quenching, workpiece detects and the age of a draught animal spacing dress with a kind of band of mold releasability situation simultaneously
The die press quenching machine tool put.
For realizing the purpose of this utility model, be the technical scheme is that the detection of a kind of band and age of a draught animal stopping means
Die press quenching machine tool, including main engine bed, workbench, column, installation lower mold on the table be arranged on dynamic crossbeam
Quenching oil cover and be arranged on the mold in quenching oil cover, it is characterised in that be provided with lower mold oil cylinder, dish below workbench
The lower plane of the lower pressure ring of shape is connected with the piston rod end of lower mold oil cylinder, and the upper plane of lower pressure ring is installed with connection
Bar, connecting rod is connected through workbench with ring-type inner cone lower surface, and the inner headed face of ring-type inner cone is taper seat；Under
It is fitted with the lower position block guide holder of annular in the mounting seat of mould, uniform on the circumference of lower position block guide holder has radially
Pilot hole, matches in each pilot hole and is provided with limited block, and ring-type inner cone is enclosed within the periphery of lower position block guide holder
On；
Mold oil cylinder is installed, plane and mold oil cylinder on ring-type upper press ring on the dynamic crossbeam in quenching oil cover
Piston rod end be connected, the lower plane of upper press ring is corresponding with ring-type inner cone upper surface；The upper limit position block of annular guides
Seat is fitted in bottom mold, uniform on the circumference of upper limit position block guide holder has radially-directed hole, in each pilot hole
Matching and be provided with limited block, ring-type inner cone is enclosed within the periphery of upper limit position block guide holder；
Being provided with the cylinder of detection on above-mentioned column, in the cylinder of detection, piston rod end is provided with workpiece spy
Gauge head, has, with mold correspondence position, the hole that piston rod in cylinder passes on quenching oil cover, at the cylinder of detection
On position detecting switch is installed, detection switch is connected with the electric control system of die press quenching machine tool.
Above-mentioned limited block is column, and one end is cambered surface, and cambered surface matches with excircle of workpiece face, and other end is inclined-plane,
The gradient on its inclined-plane matches with the inclined-plane of the internal conical surface of above-mentioned ring-type inner cone.
Axially have " u "-shaped groove on big open end on above-mentioned ring-type inner cone along it, the position of " u "-shaped groove with
Above-mentioned lower position block guide holder is corresponding with the pilot hole on upper limit position block guide holder, has along its axle on the inclined-plane of limited block
To female thread, female thread is provided with screw rod, screw rod is arranged in the " u "-shaped groove on the shape inner cone of above-mentioned ring, install
Spring on screw rod is positioned on the periphery of ring-type inner cone.
Above-mentioned position detecting switch is magnetic switch.
The technical solution of the utility model has the following characteristics that
1, it is effectively improved production efficiency.This device uses unique structure design, can meet equipment existing space structure
High accuracy between requirement, and limit shape mould of the upper and lower age of a draught animal and upper and lower mould coordinates, it is ensured that age of a draught animal mould and raceway mould
Axiality, reduce the deflection of the workpiece age of a draught animal, raceway, be effectively reduced the stock removal of post-production, improve adding of product
Work efficiency rate and qualification rate；
2, fluid power system is used, lightweight, volume is little, motional inertia is little, response speed is fast, handles easy to control,
The regulation of large-scale pressure and stepless speed regulation can be realized, it is easy to realize the Automated condtrol of machine and remotely control；
3, age of a draught animal mould is adjustable, and Deformation control is good, in this utility model, and can be by changing age of a draught animal mould Outer Taper
Stroke adjusts the internal diameter size of age of a draught animal mould, makes workpiece age of a draught animal size Control within the scope of requiring；
4, matching is good, low cost, the pressure quenching machine for railway wagon bearing overcoat workpiece age of a draught animal limit shape dress that this utility model provides
Putting, be to carry out supporting installing additional on original equipment, need not change on a large scale or increase other mechanisms, workload is little, cost
Low；
5, automaticity is high, the overcoat workpiece age of a draught animal limit shape device that this utility model provides, its action run program and
The working procedure of complete machine interlocks and links, in quenching process, and can be along with the operation tooth to overcoat workpiece automatically of equipment
Mouth deformation effectively controls, safe and reliable；
6, stripping detector simple in construction.The technical solution of the utility model uses air cylinder driven detecting head to enter workpiece
Row detection, and by the whether demoulding of the break-make detection overcoat workpiece of the magnetic switch on cylinder；
7, stripping detector uses Pneumatic drive system, is swift in motion, facilitates, without impact, the element of use and work
Medium low cost, it is simple to the automatic refit of existing machinery equipment, does not pollute environment；
8, stripping detector automaticity is high, and the sleeve workpiece detection device that this utility model provides, its action is transported
The working procedure of line program and complete machine interlocks and links, can be along with the demoulding automatically running external sleeve workpiece of equipment
Cheng Jinhang detects automatically, safe and reliable.
Accompanying drawing explanation
Accompanying drawing 1 is structural representation of the present utility model；
Accompanying drawing 2 is the structural representation of this utility model limited block；
Accompanying drawing 3 is the structural representation of this utility model lower position block guide holder；
What accompanying drawing 4 was this utility model accompanying drawing 3 partly cuts open top view；
Accompanying drawing 5 is the structural representation of this utility model lower position block guide holder
What accompanying drawing 6 was this utility model accompanying drawing 5 partly cuts open top view.
Detailed description of the invention
In Fig. 1,2,3,4,5,6, pressure ring, 4-connecting rod, 5-work under 1-main engine bed, 2-lower mold oil cylinder, 3-
Station, 6-quenching oil cover, inner cone ring-type for 7-, 7-1-" U-lag ", 8-spring, 9-screw rod, 10-limited block, 11
Lower mold, 12 workpiece, 13-upper press ring, 14-upper limit position block guide holder, 15-mold, 16-mold oil cylinder, 17-
Master cylinder, 18-entablature, 19-move under crossbeam, 20-mold seat, 21-detecting head, the cylinder of 22-detection, 23-
Limited block guide holder, 23-1-limited block pilot hole, 24-column.
As it is shown in figure 1, lower mold oil cylinder 2 is arranged on main engine bed 1, discoid lower pressure ring 3 lower end and lower mold oil cylinder
In piston rod connect, the upper plane of lower pressure ring is installed with connecting rod 4, and connecting rod is through workbench 5 and ring-type inner cone
Body 7 lower surface is connected, and the inner headed face of ring-type inner cone is taper seat；The mounting seat of lower mold 11 is fitted with under annular
Limited block guide holder 23, uniform on the circumference of lower position block guide holder has radially-directed hole 23-1, in each pilot hole
Matching and be provided with limited block 10, ring-type inner cone is enclosed within the periphery of lower position block guide holder.
Being provided with mold oil cylinder 16 on moving beam in quenching oil cover 6, on ring-type upper press ring 13, plane is with upper
The piston rod end of die cylinder is connected, and the lower plane of upper press ring is corresponding with ring-type inner cone upper surface；The upper limit of annular
Position block guide holder 14 is fitted in bottom mold 15, to ensure that the upper limit position block guide holder of annular is concentric with mold time equipped.
Uniform on the circumference of upper limit position block guide holder having radially-directed hole, matching in each pilot hole is provided with limited block 10,
Ring-type inner cone is enclosed within the periphery of upper limit position block guide holder.
As it is shown in figure 1, be provided with workbench 5 and column 24 on main engine bed 1, column is provided with entablature 18, main
Piston-rod lower end portion in oil cylinder 17 is connected with dynamic crossbeam 19, and dynamic crossbeam can be driven to move up and down, and quenching oil cover 6 is arranged on dynamic
Crossbeam bottom, the dynamic crossbeam in quenching oil cover is provided with mold 15 by mold seat 20.
Being horizontally installed with the cylinder 22 of detection on column, in the cylinder of detection, piston rod end is provided with workpiece
Detecting head 21, has, with mold correspondence position, the hole that piston rod in cylinder passes on quenching oil cover, in detection
Being provided with position detecting switch on cylinder, detection switch is connected with electric control system, and above-mentioned position detecting switch is for being arranged on
Magnetic switch on the cylinder of detection.
As in figure 2 it is shown, limited block is column, its right side is cambered surface, and cambered surface matches with the periphery of workpiece 12, right side
For inclined-plane, the gradient on its inclined-plane matches with the inclined-plane of the internal conical surface of above-mentioned ring-type inner cone.
As shown in Figure 5,6, the circumference of the lower position block guide holder 23 of annular uniform has radially-directed hole 23-1, often
Matching in individual pilot hole and be provided with limited block, the most each limited block can radially move by pilot hole.
As shown in Figure 3,4, on the big open end on ring-type inner cone 7, i.e. the upper surface shown in figure is along its axle
To having " u "-shaped groove 7-1, the position of " u "-shaped groove and the pilot hole on above-mentioned lower position block guide holder and upper limit position block guide holder
Corresponding, the inclined-plane of limited block has along its axial female thread, female thread is provided with screw rod 9, screw rod is arranged on
In " u "-shaped groove on the shape inner cone of above-mentioned ring, the spring 8 being arranged on screw rod is positioned on the periphery of ring-type inner cone.
This device work process is as follows:
1, in the sleeve workpiece mold by feed mechanism amplifier to workbench, workbench operation is supreme, lower mold is coaxial
Quenching position after；
2, master cylinder is received programmed instruction and is driven dynamic crossbeam, quenching oil cover, mold etc. to decline together, makes mold insert
Behind the quenching position of the inner hole of workpiece of red heat；Quenching position is that upper and lower quenching mould contacts with the inner headed face being quenched workpiece, and makes
Upper and lower mould is concentric with the inner circle being quenched workpiece, to reduce the radial deformation during workpiece quenching.
3, in quenching oil cover, fill quenching coolant, start to shrink at after workpiece quickly cools down and hold mould tightly, due to the age of a draught animal
Place's thinner thickness, first shrinks and puts in place, and now lower mold oil cylinder and mold oil cylinder move the most up and down, drive ring-type
Inner cone move the most up and down, by taper seat thereon promote limited block radial contraction, make the arc on limited block
Age of a draught animal external diameter in the workpiece of face is held tightly, limits its deformation in quenching, it is ensured that the age of a draught animal and raceway become in quenching process
The concordance of shape and controllability；
4, quenching terminate after, lower mold oil cylinder and mold oil cylinder drive respectively ring-type inner cone separately down with on to
Mobile, limited block pilot hole footpath along upper and lower limited block guide holder under the elastic force effect of spring is displaced outwardly, by workpiece pine
Opening, moving beam is upwards simultaneously, drives the quenching oil cover being arranged on moving beam and mold to rise to upper, treats that next follows
Ring quenches；
5, there will be following four situation after having quenched:
1) if workpiece and upper and lower mould thoroughly separate, equipment runs the most automatically；
2) if workpiece and upper and lower mould are all not separated by, equipment master cylinder system has delayed alarm function；
3) if workpiece and lower mold are not separated by, in equipment go merely arm-and-hand system without material desirable, arm-and-hand system
Delayed alarm；
4) if workpiece and mold are not separated by, detection air cylinder driven piston rod and detecting head are moved to the left through quenching
Hole on oil cover detects, if mold does not has workpiece, detection cylinder quenching oil cover has with mold correspondence position
After the hole that piston rod passes in cylinder moves into place, magnetic switch is connected, and illustrates that the location of workpiece is normal, detecting head return.
If mold and workpiece adhesion, detection cylinder location switch is obstructed, illustrates that the location of workpiece is abnormal, and workpiece detecting head time delay is returned
Position, system sends workpiece dystopy alarm signal, and equipment carries out the secondary demoulding automatically simultaneously, if the secondary demoulding is the most unsuccessful, is
System sends sound and light alarm signal autostop again, reminds such accident of operator's artificial treatment.
Claims (4)
1. band detection and a die press quenching machine tool for age of a draught animal stopping means, including main engine bed, workbench, column, be arranged on work
Lower mold in station and the quenching oil cover that is arranged on dynamic crossbeam and be arranged on the mold in quenching oil cover, it is characterised in that
In workbench (5) lower section, lower mold oil cylinder (2) is installed, the lower plane of the lower pressure ring (3) of plate-like and the piston of lower mold oil cylinder
Boom end is connected, and the upper plane of lower pressure ring is installed with connecting rod (4), and connecting rod is through workbench and ring-type inner cone
(7) lower surface is connected, and the inner headed face of ring-type inner cone is taper seat；The mounting seat of lower mold (11) is fitted with annular
Lower position block guide holder (23), uniform on the circumference of lower position block guide holder has radially-directed hole (23-1), leads each
Matching in hole and be provided with limited block (10), ring-type inner cone is enclosed within the periphery of lower position block guide holder；
Being provided with mold oil cylinder (17) on dynamic crossbeam in quenching oil cover (6), the upper plane of ring-type upper press ring (13) is with upper
The piston rod end of die cylinder is connected, and the lower plane of upper press ring is corresponding with ring-type inner cone upper surface；The upper limit of annular
Position block guide holder (14) is fitted in mold (15) bottom, uniform on the circumference of upper limit position block guide holder has radially-directed
Hole, matches in each pilot hole and is provided with limited block (10), and ring-type inner cone is enclosed within the periphery of upper limit position block guide holder
On；
Being provided with the cylinder (22) of detection on above-mentioned column (24), in the cylinder of detection, piston rod end is provided with work
Part detecting head (21), has, with mold correspondence position, the hole that piston rod in cylinder passes on quenching oil cover, in detection
Cylinder on position detecting switch is installed, detection switch is connected with the electric control system of die press quenching machine tool.
Band the most according to claim 1 detection and the die press quenching machine tool of age of a draught animal stopping means, it is characterised in that above-mentioned limit
Position block (10) is column, and one end is cambered surface, and cambered surface matches with workpiece (12) periphery, and other end is inclined-plane, its inclined-plane
The inclined-plane of gradient and the internal conical surface of above-mentioned ring-type inner cone match.
Band the most according to claim 2 detection and the die press quenching machine tool of age of a draught animal stopping means, it is characterised in that above-mentioned
Axially have " u "-shaped groove (7-1) on the ring-type big open end on inner cone (7) along it, the position of " u "-shaped groove with above-mentioned under
Limited block guide holder (23) is corresponding with the pilot hole on upper limit position block guide holder (14), has on the inclined-plane of limited block (10)
Along the female thread that it is axial, being provided with screw rod (9) on female thread, screw rod is arranged on " U " on the shape inner cone (7) of above-mentioned ring
In shape groove, the spring (8) being arranged on screw rod is positioned on the periphery of ring-type inner cone.
Band the most according to claim 3 detection and the die press quenching machine tool of age of a draught animal stopping means, it is characterised in that upper rheme
Putting detection switch is magnetic switch.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620653675.0U CN205741120U (en) | 2016-06-28 | 2016-06-28 | Band detection and the die press quenching machine tool of age of a draught animal stopping means |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620653675.0U CN205741120U (en) | 2016-06-28 | 2016-06-28 | Band detection and the die press quenching machine tool of age of a draught animal stopping means |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205741120U true CN205741120U (en) | 2016-11-30 |
Family
ID=57381477
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620653675.0U Withdrawn - After Issue CN205741120U (en) | 2016-06-28 | 2016-06-28 | Band detection and the die press quenching machine tool of age of a draught animal stopping means |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205741120U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105886725A (en) * | 2016-06-28 | 2016-08-24 | 宁夏机械研究院股份有限公司 | Press quenching machining tool with detection and circular ring part limiting devices |
| CN108486334A (en) * | 2018-04-23 | 2018-09-04 | 赣州群星机器人有限公司 | A kind of bull gear die quenching device |
| CN109306397A (en) * | 2018-12-03 | 2019-02-05 | 宁夏机械研究院股份有限公司 | Quenching press |
-
2016
- 2016-06-28 CN CN201620653675.0U patent/CN205741120U/en not_active Withdrawn - After Issue
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105886725A (en) * | 2016-06-28 | 2016-08-24 | 宁夏机械研究院股份有限公司 | Press quenching machining tool with detection and circular ring part limiting devices |
| CN105886725B (en) * | 2016-06-28 | 2017-07-21 | 宁夏机械研究院股份有限公司 | Die press quenching machine tool with detection and age of a draught animal stopping means |
| CN108486334A (en) * | 2018-04-23 | 2018-09-04 | 赣州群星机器人有限公司 | A kind of bull gear die quenching device |
| CN109306397A (en) * | 2018-12-03 | 2019-02-05 | 宁夏机械研究院股份有限公司 | Quenching press |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105886725B (en) | Die press quenching machine tool with detection and age of a draught animal stopping means | |
| CN205741120U (en) | Band detection and the die press quenching machine tool of age of a draught animal stopping means | |
| US20170209969A1 (en) | Lathe Chuck for Aluminum Alloy Hubs | |
| JPH01104441A (en) | Manufacturing equipment for equal velocity joint and its similar item | |
| CN104511566B (en) | The process of loader intermediate input axle closed die forging | |
| CN205741132U (en) | Sleeve workpiece demoulding detection device | |
| CN112059088B (en) | Multi-station die holder for punch press | |
| CN105907934B (en) | Quenching machine with mould quick change and age of a draught animal stopping means | |
| CN102528465A (en) | Hot-extrusion production line of prestressed anchorage device clamping piece | |
| CN110860640A (en) | Machining method and forging die for wind power high-hub large gear | |
| CN205874493U (en) | Sleeve part quenching age of a draught animal limit shape device | |
| CN205933918U (en) | Take mould quick change and age of a draught animal stop device's quench machining tool | |
| CN210387403U (en) | Hot forging combined die for open type fixed table press | |
| CN213002438U (en) | Multi-station die holder for punch press | |
| CN105414313B (en) | The station platform of rotatable floating four for U-shaped chain carrier bar punching | |
| CN210146900U (en) | Automobile wheel hub unit type compound die that punches a hole | |
| CN211191837U (en) | Wind-powered electricity generation high wheel hub large gear forges mould | |
| CN109536684B (en) | Pressure quenching equipment | |
| CN204053396U (en) | Gear and axle assembly tooling | |
| CN102199693B (en) | Pneumatic quick-change mold connecting device | |
| CN105234331B (en) | A kind of braking automobile processes stamping machine with piston element | |
| CN212704434U (en) | Machining chuck for manufacturing thin-walled part by using bearing | |
| CN221275828U (en) | Spacing outer mould of embracing | |
| CN212042295U (en) | Die for processing transmission gear of motorcycle gearbox | |
| CN216501921U (en) | General annular trapezoidal section part forming die |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20161130 Effective date of abandoning: 20170721 |