CN211072122U - Crankshaft internal spline machining device - Google Patents
Crankshaft internal spline machining device Download PDFInfo
- Publication number
- CN211072122U CN211072122U CN201922023527.7U CN201922023527U CN211072122U CN 211072122 U CN211072122 U CN 211072122U CN 201922023527 U CN201922023527 U CN 201922023527U CN 211072122 U CN211072122 U CN 211072122U
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- Prior art keywords
- crankshaft
- internal spline
- clamping
- magnetic
- machine tool
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- 238000003754 machining Methods 0.000 title claims abstract description 47
- 238000010892 electric spark Methods 0.000 claims abstract description 35
- 238000003825 pressing Methods 0.000 claims description 21
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 16
- 229910000831 Steel Inorganic materials 0.000 claims description 8
- 229910052742 iron Inorganic materials 0.000 claims description 8
- 239000010959 steel Substances 0.000 claims description 8
- 230000006698 induction Effects 0.000 claims description 3
- 238000012545 processing Methods 0.000 abstract description 16
- 235000014676 Phragmites communis Nutrition 0.000 description 18
- 244000273256 Phragmites communis Species 0.000 description 8
- 239000011521 glass Substances 0.000 description 4
- 230000005389 magnetism Effects 0.000 description 4
- 239000004033 plastic Substances 0.000 description 4
- 238000000034 method Methods 0.000 description 3
- QJVKUMXDEUEQLH-UHFFFAOYSA-N [B].[Fe].[Nd] Chemical compound [B].[Fe].[Nd] QJVKUMXDEUEQLH-UHFFFAOYSA-N 0.000 description 2
- 238000004891 communication Methods 0.000 description 2
- 230000005347 demagnetization Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000010862 gear shaping Methods 0.000 description 2
- 230000001939 inductive effect Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 229910001172 neodymium magnet Inorganic materials 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 229910000859 α-Fe Inorganic materials 0.000 description 2
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009760 electrical discharge machining Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
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Abstract
The utility model discloses a crankshaft internal spline machining device, which comprises an electric spark machining machine tool, wherein a fixing device is arranged on the electric spark machining machine tool; the clamping device is used for clamping the crankshaft, and the fixing device is used for fixing the clamping device on an electric spark machining machine tool; the electrode is arranged on the electric spark machining machine tool and is controlled through an operation interface on the electric spark machining machine tool, so that the electrode is controlled to machine the internal spline of the crankshaft; when the internal spline of the crankshaft is machined, the clamping device is fixed on an electric spark machining machine tool through the fixing device, the clamping device clamps the end part of the crankshaft, and after the center of the electrode is aligned with the center of the internal spline of the crankshaft, the interface is operated to control the electrode, so that the internal spline required by the crankshaft is machined. The utility model is suitable for a length is less, the quality is lighter bent axle processing, for the processing of bent axle internal spline, provides a new device, compares with other current modes, and the device is simple, and processing is convenient.
Description
Technical Field
The utility model belongs to the technical field of the bent axle processingequipment, concretely relates to bent axle internal spline processingequipment.
Background
Aiming at the market demand, in the prior art, a new crankshaft is researched, because the crankshaft is short in length, small in diameter and light in weight, and an internal spline is arranged at one end of the crankshaft to act on the crankshaft, the crankshaft is integrally processed, the existing gear shaping and spline machine tools are not enough in stroke, so that interference is caused, processing cannot be carried out, and in order to successfully complete the development of the project, the traditional processing of gear shaping and spline needs to be broken through, and a processing device for the internal spline of the crankshaft is provided.
Disclosure of Invention
An object of the utility model is to provide a device for processing of internal spline of little bent axle, its principle that utilizes the electrode machining hole, with the processing effect of electrode transfer to the bent axle on, provided a processingequipment of bent axle internal spline.
In order to realize the technical effect, the utility model discloses a following technical scheme realizes.
A crankshaft internal spline machining apparatus, comprising:
the electric spark machine tool is provided with a fixing device;
the clamping device is used for clamping the crankshaft, and the fixing device is used for fixing the clamping device on an electric spark machining machine tool;
the electrode is arranged on the electric spark machining machine tool and is controlled through an operation interface on the electric spark machining machine tool, so that the electrode is controlled to machine the internal spline of the crankshaft;
when the internal spline of the crankshaft is machined, the clamping device is fixed on an electric spark machining machine tool through the fixing device, the clamping device clamps the end part of the crankshaft, and after the center of the electrode is aligned with the center of the internal spline of the crankshaft, the interface is operated to control the electrode, so that the internal spline required by the crankshaft is machined.
In the technical scheme, the electrode is used for machining the internal spline with the inner hole of the crankshaft through an electric spark pulse method, the electric spark pulse machining device is suitable for machining the crankshaft with smaller length and lighter weight, a new device is provided for machining the internal spline of the crankshaft, and compared with other existing modes, the electric spark pulse machining device is simple and convenient to machine.
In the technical scheme, the principle that the electrode numerical control machine tool is provided with the fixing device is utilized, the fixing device on the machine tool, namely the sucker, is fully utilized, the utilization rate of the numerical control machine tool is improved, and the space is saved.
In the technical scheme, the existing clamping device is utilized to realize the fixed clamping of the special structure of the crankshaft, and conditions are provided for subsequent processing.
As a further improvement of the present invention, the holding device is a magnetic holding device.
Through adopting magnetism clamping device, compare in prior art through fixing that multiple fixing device goes on, the mode is simple, moreover make full use of electrode lathe itself from the characteristics of taking the disc for the resource obtains make full use of, and the fixed mode is nimble.
As a further improvement, the fixing device is a magnetic disc arranged on the electric spark machine tool, and the magnetic disc is fixed with the magnetic clamping device through magnetic attraction.
By directly utilizing the magnetic disc, other devices are not required to be added, the structure of the machine tool is not required to be improved, and the cost is low.
As a further improvement, the utility model also comprises a magnetic control switch arranged on the operation interface, the magnetic control switch is used for controlling the magnetic disk, and the magnetic attraction and the release to the clamping device are realized.
Through the magnetic force control switch, can adjust and lead to magnetism whether, and then can adjust magnetism and inhale or release clamping device. Specifically, the magnetic control switch is used for enabling the magnetic disc to be electrified so as to attract other components (such as a V-shaped block) to control the magnetic force and demagnetization of the magnetic disc, and therefore the magnetic attraction of the magnetic clamping device is achieved.
As a further improvement of the utility model, the magnetic control switch is an inductive switch.
Specifically, the magnetic switch means that the magnetic switch is induced by a magnet, the "magnet" is a magnet, and there are several kinds of magnets, and the magnets commonly used in the market include rubber magnet, permanent ferrite, sintered neodymium iron boron and the like. The switch is the reed switch. The dry reed pipe is a passive electronic switch element with contact, and has the advantages of simple structure, small size and easy control. Normally, two leaves made of special material in the glass tube are separated. When magnetic substance is near the glass tube, under the action of magnetic force line of magnetic field, the two reeds in the tube are magnetized and mutually attracted and contacted, and then the reeds are attracted together, so that the circuit connected with the node is communicated. After the external magnetic force disappears, the two reeds are separated due to the elasticity of the reeds, and the circuit is disconnected. Therefore, as a line switching device controlled by a magnetic field signal, the reed switch can be used as a sensor for counting, limiting and the like (mainly used for manufacturing door magnets and window magnets in a security system), and is also widely used in various communication devices. In practice, the two metal sheets are usually controlled by permanent magnets, and are also called "magnetrons". The reed switch is a switch element controlled by magnetic field signal, has no magnetic disconnection, and can be used for detecting circuit or mechanical movement state, and another magnetic switch is a proximity switch, a door magnetic switch, or an induction switch on the market, and is a standard size plastic shell, and the reed switch is embedded in a black shell, and a conducting wire is led out, and the other half of the plastic shell with a magnet is fixed at the other end, when the magnet is close to the switch with the conducting wire, a switch signal is sent out, and the general signal distance is 10mm to be switched on, so that the product is widely introduced to electronic equipment such as security doors, household doors, printers, fax machines, telephones, and the like.
As a further improvement of the utility model, the magnetic clamping device is a steel V-shaped block or an iron V-shaped block.
The fixing of the crankshaft is realized by adopting the V-shaped block commonly used in the prior art, so that the device in the prior art is fully utilized, and other structures are not required to be added or arranged independently. When the magnetic attraction is carried out, most end faces of the V-shaped block are clamped on the magnetic disc and are attracted and fixed on the magnetic disc through magnetic force, so that the magnetic attraction of the V-shaped block is realized.
Further, the steel V-shaped block or the iron V-shaped block is perpendicular to the fixing device, and the V-shaped section is perpendicular to the length direction of the crankshaft, namely the largest face of the steel V-shaped block or the iron V-shaped block is connected with the fixing device, for example, when the cross section of the V-shaped section is large, the V-shaped cross section is tightly attached to the fixing device, and meanwhile, the height of the crankshaft is inserted into the V-shaped to achieve fixing.
As a further improvement of the utility model, clamping device forms the clamping part, along bent axle direction of height, the bent axle inserts in the clamping part, realize the centre gripping.
For the crankshaft, the vertical fixation is more convenient than the horizontal fixation in the machining process, at the moment, the crankshaft is inserted into the clamping part in the height direction, the part to be machined is exposed on a machine tool, and the machining of the internal spline of the crankshaft can be realized by adjusting the height of the electrode on the machine tool. Specifically, an end portion of the crankshaft is clamped in the clamping portion.
As a further improvement of the utility model, still include the clamp plate, the both ends of clamp plate are connected with the both ends of clamping part respectively to be used for the bent axle to compress tightly on the clamping part.
Specifically, the pressing plate is perpendicular to the height direction of the crankshaft and used for pressing between the crankshaft and the clamping part. In the prior art, when the clamping part clamps the crankshaft, part of the cross section of the crankshaft is always exposed, so that the stability of the crankshaft in the height direction is poor, and the added pressing plate enables the exposed part of the crankshaft to be pressed by the pressing plate, so that the crankshaft can be comprehensively clamped at the same height, and the stability is higher.
As a further improvement of the utility model, follow the both ends of clamp plate are equipped with respectively and are used for bolt male first slot and second slot, the opening direction of first slot is perpendicular with the opening direction of second slot. Through setting up mutually perpendicular's first slot and second slot, on the one hand, the bolt of being convenient for inserts, on the other hand, because the opening direction is different, and then during fastening connection, has ensured the not equidirectional fixed of clamp plate, avoids the syntropy to set up, uses after a period, and bolt or clamp plate motion lead to two bolts of same direction not hard up, and then lead to the problem that the clamp plate drops.
As a further improvement, the both ends symmetry of clamping part is equipped with a plurality of screws, the clamp plate passes through compressing tightly between the bolt realization bent axle and the different positions of clamping part.
In the technical scheme, the plurality of screw holes are formed, so that the contact height of the pressing plate and the crankshaft can be adjusted, and the crankshafts with different heights can be conveniently and fixedly pressed.
Drawings
Fig. 1 is one of schematic structural diagrams of a crankshaft internal spline machining device provided by the present invention;
fig. 2 is a second schematic structural view of a crankshaft internal spline machining apparatus provided in the present invention;
fig. 3 is a schematic structural view of the clamping device provided by the present invention;
fig. 4 is a top view of the clamping device provided by the present invention;
fig. 5 is a schematic view of the internal spline structure of the processed crankshaft provided by the present invention;
in the figure:
1. an electric discharge machine; 2. a fixing device; 3. a clamping device; 4. a crankshaft; 5. an electrode; 6. pressing a plate; 7. a bolt; 8. a first slot; 9. a second slot; 10. an internal spline.
Detailed Description
The following describes embodiments of the present invention in further detail with reference to the accompanying drawings.
Example 1
Referring to fig. 1-2, the utility model provides a crankshaft internal spline processingequipment, include:
the electric spark machining tool comprises an electric spark machining tool 1, wherein a fixing device 2 is arranged on the electric spark machining tool 1;
the clamping device 3 is used for clamping the crankshaft 4, and the fixing device 2 is used for fixing the clamping device 3 on the electric spark machining machine tool 1;
the electrode 5 is arranged on the electric spark machine tool 1 and is controlled through an operation interface on the electric spark machine tool 1, so that the electrode is controlled to machine the internal spline of the crankshaft;
when the internal spline of the crankshaft is machined, the clamping device 3 is fixed on the electric spark machine tool 1 through the fixing device 2, the end part of the crankshaft 4 is clamped by the clamping device 3, and after the center of the electrode 5 is aligned with the center of the internal spline of the crankshaft 4, the electrode 5 is controlled by an operation interface, so that the internal spline required by the crankshaft 2 is machined.
In this embodiment, through electrode 5, and then pass through the processing of electric spark pulse method realization internal spline with the hole of bent axle, be applicable to the length less, the processing of the lighter bent axle of quality, for the processing of bent axle internal spline, provide a new device, compare with other modes of current, the device is simple, processing is convenient.
In the embodiment, the principle that the electrode numerical control machine tool is provided with the fixing device is utilized, the fixing device on the machine tool, namely the sucker, is fully utilized, the utilization rate of the numerical control machine tool is improved, and the space is saved.
In this embodiment, utilize current clamping device, realized the fixed centre gripping of this special structure of bent axle, for subsequent processing, provide the condition.
Example 2
Referring to fig. 1-2, further, the clamping device 3 is a magnetic clamping device.
Through adopting magnetism clamping device, compare in prior art through fixing that multiple fixing device goes on, the mode is simple, moreover make full use of electrode lathe itself from the characteristics of taking the disc for the resource obtains make full use of, and the fixed mode is nimble.
Furthermore, the fixing device 2 is a magnetic disc arranged on the electric spark machine 1, and the magnetic disc and the magnetic clamping device are fixed through magnetic attraction.
By directly utilizing the magnetic disc, other devices are not required to be added, the structure of the machine tool is not required to be improved, and the cost is low.
In order to facilitate fixing, the magnetic clamping device further comprises a magnetic control switch arranged on the control interface, and the magnetic control switch is used for controlling the magnetic disc and realizing magnetic attraction and release of the clamping device. Specifically, through the magnetic control switch, can adjust magnetic force, and then can adjust magnetic clamping device's stability, realize its stability's adjustment. When the magnetic control switch is used, the magnetic control switch is used for enabling the magnetic disc to be electrified so as to attract other parts (such as a V-shaped block) to control the magnetic force and demagnetization of the magnetic disc, and therefore the magnetic attraction of the magnetic clamping device is realized.
Further, the magnetic control switch is an inductive switch.
Specifically, the magnetic switch means that the magnetic switch is induced by a magnet, the "magnet" is a magnet, and there are several kinds of magnets, and the magnets commonly used in the market include rubber magnet, permanent ferrite, sintered neodymium iron boron and the like. The switch is the reed switch. The dry reed pipe is a passive electronic switch element with contact, and has the advantages of simple structure, small size and easy control. Normally, two leaves made of special material in the glass tube are separated. When magnetic substance is near the glass tube, under the action of magnetic force line of magnetic field, the two reeds in the tube are magnetized and mutually attracted and contacted, and then the reeds are attracted together, so that the circuit connected with the node is communicated. After the external magnetic force disappears, the two reeds are separated due to the elasticity of the reeds, and the circuit is disconnected. Therefore, as a line switching device controlled by a magnetic field signal, the reed switch can be used as a sensor for counting, limiting and the like (mainly used for manufacturing door magnets and window magnets in a security system), and is also widely used in various communication devices. In practice, the two metal sheets are usually controlled by permanent magnets, and are also called "magnetrons". The reed switch is a switch element controlled by magnetic field signal, has no magnetic disconnection, and can be used for detecting circuit or mechanical movement state, and another magnetic switch is a proximity switch, a door magnetic switch, or an induction switch on the market, and is a standard size plastic shell, and the reed switch is embedded in a black shell, and a conducting wire is led out, and the other half of the plastic shell with a magnet is fixed at the other end, when the magnet is close to the switch with the conducting wire, a switch signal is sent out, and the general signal distance is 10mm to be switched on, so that the product is widely introduced to electronic equipment such as security doors, household doors, printers, fax machines, telephones, and the like.
Further, the magnetic clamping device is a steel V-shaped block or an iron V-shaped block, specifically, the steel V-shaped block or the iron V-shaped block is perpendicular to the fixing device, and the V-shaped section is perpendicular to the length direction of the crankshaft.
The fixing of the crankshaft is realized by adopting the V-shaped block commonly used in the prior art, so that the device in the prior art is fully utilized, and other structures are not required to be added or arranged independently. When the magnetic attraction is carried out, most end faces of the V-shaped block are clamped on the magnetic disc and are attracted and fixed on the magnetic disc through magnetic force, so that the magnetic attraction of the V-shaped block is realized.
During actual installation, the steel V-shaped block or the iron V-shaped block is perpendicular to the fixing device, and the V-shaped section is perpendicular to the length direction of the crankshaft, namely the maximum surface of the steel V-shaped block or the iron V-shaped block is connected with the fixing device, for example, when the cross section of the V-shaped section is large, the V-shaped cross section is tightly attached to the fixing device, and meanwhile, the height of the crankshaft is inserted into the V-shaped to achieve fixing.
Further, the clamping device forms a clamping portion, and the crankshaft is inserted into the clamping portion along the height direction of the crankshaft to realize clamping.
For the crankshaft, the vertical fixation is more convenient than the horizontal fixation in the machining process, at the moment, the crankshaft is inserted into the clamping part in the height direction, the part to be machined is exposed on a machine tool, and the machining of the internal spline of the crankshaft can be realized by adjusting the height of the electrode on the machine tool.
Example 3
As a further improvement of embodiment 2, referring to fig. 3-4, in order to fixedly press the crankshaft 4, the clamping device further includes a pressing plate 6, two ends of the pressing plate 6 are respectively connected with two ends of the clamping portion, and the pressing plate 6 is perpendicular to the height direction of the crankshaft 4 and is used for pressing between the crankshaft 4 and the clamping portion.
In the prior art, when the clamping part clamps the crankshaft, part of the cross section of the crankshaft is always exposed, so that the stability of the crankshaft in the height direction is poor, and the added pressing plate enables the exposed part of the crankshaft to be pressed by the pressing plate, so that the crankshaft can be comprehensively clamped at the same height, and the stability is higher.
Specifically, in this embodiment, referring to fig. 4, the V-shaped block is used as a clamping device to clamp one side of the crankshaft, and the pressing plate 6 presses the other side of the crankshaft to form a closed area with the V-shaped block to fixedly clamp the crankshaft 4.
In order to fix the pressing plate on the clamping part, a first slot 8 and a second slot 9 for inserting the bolt 7 are respectively arranged along two ends of the pressing plate 6, and the opening direction of the first slot 8 is vertical to the opening direction of the second slot 9. Through setting up mutually perpendicular's first slot 8 and second slot 9, on the one hand, the bolt 7's of being convenient for inserts, on the other hand, because the opening direction is different, and then during fastening connection, has ensured the fixed of clamp plate 6 equidirectional, avoids the syntropy to set up, uses after a period, and bolt 7 or clamp plate 6 motion lead to two bolts of same direction not hard up, and then lead to the problem that clamp plate 6 drops.
In this embodiment, set up the different slot of two opening directions ingeniously, and then the bolt passes through the slot on the clamp plate 6, inserts in clamping device 3, then fixes it through the nut outside the bolt, has realized the firm when clamp plate 6 is connected with clamping device 3.
Furthermore, a plurality of screw holes are symmetrically formed in two ends of the clamping portion, and the pressing plate 6 is pressed between the crankshaft and different positions of the clamping portion through bolts.
In this embodiment, owing to be provided with a plurality of screws, and then clamp plate and bent axle contact height can adjust, and the not compressing tightly of the bent axle of co-altitude of being convenient for is fixed.
And further, the device also comprises a dial indicator, wherein the dial indicator is used for measuring the perpendicularity of the crankshaft and the numerical control machine tool after the crankshaft is fixed.
In this embodiment, the electric discharge machine is a conventional MP-50 type electric discharge machine, which is a conventional machine used for pulse spark machining, such as inner hole machining and the like.
In the technical scheme, the verticality is measured through the dial indicator, and the machining precision is improved.
Use the utility model provides a processingequipment needs to process the internal spline 10 in the attached figure 5, and its processing step is as follows:
s1 crankshaft clamping: clamping one end of the crankshaft 4 far away from the end to be machined on the electric spark machine tool 1 through a clamping device 3 fixed on the electric spark machine tool 1;
s2 crankshaft alignment: the center line of the crankshaft 4 is aligned through a dial indicator, so that the center line is perpendicular to the electric spark machining tool 1;
s3 center alignment: adjusting an electrode 5 on the electric spark machine tool 1 to align the electrode with the center of an internal spline 10 at one end to be machined on the crankshaft 4;
machining the internal spline 10 of S4: by adjusting the parameters on the electric spark machine tool 1, the electrode 5 matched with the internal spline is output, and the processing of the crankshaft internal spline by the electrode is realized.
Specifically, the electric spark machine tool is provided with a motor, and a main shaft head on the motor is connected with an electrode through a connecting main shaft, so that the control of the electrode is realized.
The utility model provides a bent axle, the main parameter is as follows: the length of the crankshaft is 390-440 mm, the weight is 10-12Kg, the diameter of the main journal is phi 60mm, the diameter of the connecting rod journal is phi 50mm, the thrust opening is 24mm, and the gyration radius R46mm is obtained.
The basic principles and the main features of the invention and the advantages of the invention have been shown and described above. It will be understood by those skilled in the art that the present invention is not limited to the above embodiments, and that the foregoing embodiments and descriptions are provided only to illustrate the principles of the present invention without departing from the spirit and scope of the present invention. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (10)
1. The utility model provides a bent axle internal spline processingequipment which characterized in that includes:
the electric spark machine tool is provided with a fixing device;
the clamping device is used for clamping the crankshaft, and the fixing device is used for fixing the clamping device on an electric spark machining machine tool;
the electrode is arranged on the electric spark machining machine tool and is controlled through an operation interface on the electric spark machining machine tool, so that the electrode is controlled to machine the internal spline of the crankshaft;
when the internal spline of the crankshaft is machined, the clamping device is fixed on an electric spark machining machine tool through the fixing device, the clamping device clamps the end part of the crankshaft, and after the center of the electrode is aligned with the center of the internal spline of the crankshaft, the interface is operated to control the electrode, so that the internal spline required by the crankshaft is machined.
2. The crankshaft internal spline machining device according to claim 1, wherein the clamping device is a magnetic clamping device.
3. The crankshaft internal spline machining device according to claim 2, wherein the fixing device is a magnetic disc arranged on an electric discharge machine tool, and the magnetic disc and the magnetic clamping device are fixed through magnetic attraction.
4. The crankshaft internal spline machining device according to claim 3, further comprising a magnetic control switch arranged on the operation interface, wherein the magnetic control switch is used for controlling a magnetic disc to achieve magnetic attraction and release of the clamping device.
5. The crankshaft internal spline machining device according to claim 4, wherein the magnetic control switch is an induction switch.
6. The crankshaft internal spline machining device according to claim 2, wherein the magnetic clamping device is a steel V-shaped block or an iron V-shaped block.
7. The crankshaft internal spline machining device according to claim 6, wherein the clamping device forms a clamping portion, and the crankshaft is inserted into the clamping portion in the height direction of the crankshaft to achieve clamping.
8. The crankshaft internal spline machining device according to claim 7, further comprising a pressing plate, wherein two ends of the pressing plate are respectively connected with two ends of the clamping portion and used for pressing the crankshaft on the clamping portion.
9. The crankshaft internal spline machining device according to claim 8, wherein a first slot and a second slot for inserting a bolt are respectively formed along two ends of the pressure plate, and an opening direction of the first slot is perpendicular to an opening direction of the second slot.
10. The crankshaft internal spline machining device according to claim 9, wherein a plurality of screw holes are symmetrically formed in two ends of the clamping portion, and the pressing plate is used for achieving pressing between different positions of the crankshaft and the clamping portion through the bolts.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922023527.7U CN211072122U (en) | 2019-11-21 | 2019-11-21 | Crankshaft internal spline machining device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922023527.7U CN211072122U (en) | 2019-11-21 | 2019-11-21 | Crankshaft internal spline machining device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211072122U true CN211072122U (en) | 2020-07-24 |
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ID=71635029
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922023527.7U Expired - Fee Related CN211072122U (en) | 2019-11-21 | 2019-11-21 | Crankshaft internal spline machining device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211072122U (en) |
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2019
- 2019-11-21 CN CN201922023527.7U patent/CN211072122U/en not_active Expired - Fee Related
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