CN102513412B - Broach straightening device - Google Patents
Broach straightening device Download PDFInfo
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- CN102513412B CN102513412B CN201110413657.7A CN201110413657A CN102513412B CN 102513412 B CN102513412 B CN 102513412B CN 201110413657 A CN201110413657 A CN 201110413657A CN 102513412 B CN102513412 B CN 102513412B
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- slide rail
- broach
- sliding seat
- sliding
- hole
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Abstract
The invention discloses a broach straightening device which comprises a workbench, a sliding rail, two sliding bases and two vertex sliding bases. The sliding rail is arranged at the rear of the workbench; the two sliding bases match with the sliding rail in a sliding way; the two vertex sliding bases and the sliding bases are arranged correspondingly and move synchronously along the sliding rail; the two sliding bases are sleeved on a connecting rod which is arranged parallel to the sliding rail; one end of each vertex sliding base matches with the connecting rod in a rotating way, and the other end is supported on the sliding bases through a spring support device; the front ends of the vertex sliding bases, which face to the workbench, are provided with a vertex device which is used for clamping a broach; the workbench is provided with at least two V-shaped iron; and the sliding bases are provided with locking devices used for locking the sliding bases and the connecting rod. Due to the adoption of the broach straightening device, the point to be straightened on the broach can be found conveniently, and the broach can be straightened directly on the broach straightening device. Only one-time clamping is needed in the whole broach straightening process, thus the burden of the worker is reduced, and the work efficiency is improved.
Description
Technical field
The present invention relates to a kind of coalignment, concrete is a kind of broach straightening device.
Background technology
Broaching tool is generally used for processing endoporus, because of general thin length of broaching tool shape, therefore flexible, no matter be in machining, still in heat treatment, all easily causes that the bending that flexural deformation, particularly heat treatment causes is larger.The straightener using after existing broaching tool heat treatment needs pure artificial type operation completely, and efficiency is low, and workman works burden greatly.Existing broaching tool straightener in use, first will find the point that needs alignment, more manually lift alignment below hammer, and to need the point of alignment be uncertain, needs the reciprocal product of moving, and the labour of waste is just more.Along with the enlarged diameter of broaching tool, weight weightening finish, workman's labour intensity is increasing.How in broaching tool alignment process, to realize mechanization, and use suitable alignment frock extremely urgent.
Given this, the present invention is intended to propose a kind of broach straightening device, broaching tool is arranged on after this broach straightening device, not only can find easily the point that needs alignment, and directly alignment on this broach straightening device, in whole alignment process, only need disposable clamping, not only alleviated workman's burden, and improved operating efficiency.
Summary of the invention
The technical problem to be solved in the present invention is to propose a kind of broach straightening device, this broach straightening device can not only find the point that needs alignment on broaching tool easily, and directly alignment on this broach straightening device, in whole alignment process, only need disposable clamping, not only alleviate workman's burden, and improved operating efficiency.
Realize above-mentioned technical purpose, broach straightening device of the present invention, comprise workbench, be arranged on the slide rail of described workbench rear side, two sliding seats that are slidably matched with described slide rail and with described sliding seat one by one corresponding setting and respectively with described sliding seat along synchronization-moving two the top slides of slide rail direction, described two sliding seats are all sleeved on the connecting rod be arrangeding in parallel with described slide rail, described top slide one end and described connecting rod are rotatably assorted, the other end is supported on described sliding seat by spring supporting device, described top slide is provided with the Finial device for clamping broaching tool towards the front end of described workbench, described workbench is provided with at least two V shape irons, described sliding seat is provided with the locking device for sliding seat and the locking of described connecting rod.
Further, between described slide rail and described workbench, be also provided with slide rail regulating device, described slide rail regulating device comprises at least two adjusting slide rails and is fixedly connected with described workbench rear side and L-shaped back-up block, described adjusting slide rail is L-type, and on the two side of described adjusting slide rail, be respectively equipped with vertically the kidney-shaped button head screw hole I that extends and along the kidney-shaped button head screw hole II perpendicular to described slide rail direction, threaded fastener extends through this kidney-shaped button head screw hole I and kidney-shaped button head screw hole II matches with the screwed hole that is arranged on the screwed hole on described slide rail and be arranged on described back-up block respectively,
Further, described spring supporting device comprises spring lever and is sleeved on the spring on this spring lever, the two ends of described spring lever are set in the through hole being arranged on described sliding seat and top slide, and described spring is between described sliding seat and top slide;
Further, described locking device comprises lock handle and is threaded with this lock handle and is arranged on the locking hole on described sliding seat, described locking hole be arranged on described sliding seat on and for being set with the connecting hole of described connecting rod, communicate;
Further, described sliding seat is provided with the chute matching with described slide rail, between the two side of described chute and chute top and described slide rail, is equipped with single-row radial ball bearing;
Further, described top slide front end is provided with for the installing hole of Finial device is installed, and described Finial device comprises the center sleeve that is sleeved in described installing hole and be arranged on top in center sleeve, and described top axis is parallel with described slide rail;
Further, described top slide front end is provided with for the installing hole of Finial device is installed, described Finial device comprises the center sleeve that is sleeved in described installing hole, be arranged on top in center sleeve and for promoting described top and center sleeve along installing hole thrust unit in axial sliding, described top axis is parallel with described slide rail;
Further, described thrust unit comprises the adjusting nut being fixedly mounted in described center sleeve, the screw rod coordinating with this adjusting nut, and the handwheel being circumferentially fixedly connected with described screw rod and be arranged on the handle at handwheel edge, between described screw rod and described installing hole, be provided with rotary axle box and be arranged on described screw rod and described rotary axle box between bearing;
Further, described center sleeve and be describedly provided with bellmouth and the tapered rod cooperatively interacting between top, the diameter of described bellmouth and the tapered rod all direction along top head to afterbody successively decreases;
Further, described workbench is provided with guide rail, and described V shape iron is provided with the slide block matching with described guide rail.
Beneficial effect of the present invention is:
1, broach straightening device of the present invention is by two sliding seats that slide rail are set and coordinate with slide rail, single sliding seat all can slide separately on slide rail, and after two sliding seats being locked on connecting rod by locking device, can synchronizing moving between two sliding seats, broaching tool by clamping on the Finial device of two top slides, and two top slides respectively with sliding seat along slide rail synchronizing moving, can drive broaching tool to move left and right along slide rail direction, and broaching tool also can overturn between Finial device, can on broaching tool, find easily the point that needs alignment; After finding the point that needs alignment, moved to below hammer, by broaching tool, to pressing down, because top slide one end and connecting rod are rotatably assorted, one end is supported by spring supporting device, under the downward pressure of weight, top slide be take connecting rod as rotating shaft rotation, and broaching tool is pressed between two V shape irons, continues to pressing down, broaching tool will occur bending and deformation, and finally reaches the object of alignment; Therefore, broach straightening device of the present invention can not only find the point that needs alignment on broaching tool easily, and directly alignment on this broach straightening device, only needs disposable clamping in whole alignment process, not only alleviate workman's burden, and improved operating efficiency;
2, by slide rail regulating device being set between slide rail and workbench, between the adjusting slide rail of slide rail regulating device and back-up block and slide rail, all adopt threaded fastener to be connected, and be arranged on the screw hole I and the screw hole II that regulate on slide rail and be all kidney-shaped circle, therefore can change the fixed position regulating between slide rail and back-up block and slide rail, and then regulate the position up and down of slide rail;
3,, by thrust unit is set on Finial device, when clamping broaching tool, shake the handwheel of thrust unit, make top moving forward withstand broaching tool, while pulling down broaching tool, can make top mobile separated with broaching tool backward, therefore, by being set, thrust unit can be convenient to clamping and the dismounting of broaching tool.
Accompanying drawing explanation
Fig. 1 is broach straightening device example structure schematic diagram of the present invention;
Fig. 2 is the A-A cutaway view of Fig. 1;
Fig. 3 is Finial device the first structural representation;
Fig. 4 is Finial device the second structural representation;
Stressed schematic diagram when Fig. 5 is broaching tool alignment.
Description of reference numerals:
1-workbench; 2-slide rail; 3-sliding seat; The top slide of 4-; 5-connecting rod; 6-V shape iron; 7-through hole; 8-through hole; 9-spring lever; 10-spring; 11-chute; 12-single-row radial ball bearing; 13-back-up block; 14-adjusting slider; 15-screw hole I; 16-screw hole II; 17-lock handle; 18-locking hole; 19-connecting hole; 20-installing hole; 21-center sleeve; 22-is top; 23-adjusting nut; 24-screw rod; 25-handwheel; 26-handle; 27-rotary axle box; 28-bearing; 29-bellmouth; 30-tapered rod; 31-guide rail.
The specific embodiment
Below in conjunction with accompanying drawing, the specific embodiment of the present invention is elaborated.
As shown in Figure 1, be broach straightening device example structure schematic diagram of the present invention; Fig. 2 is the A-A cutaway view of Fig. 1.The broach straightening device of the present embodiment, comprise workbench 1, be arranged on the slide rail 2 of described workbench 1 rear side, two sliding seats 3 that are slidably matched with described slide rail 2 and with described sliding seat 3 one by one corresponding setting and respectively with described sliding seat 3 along synchronization-moving two the top slides 4 of slide rail direction, described two sliding seats 3 are all sleeved on the connecting rod 5 be arrangeding in parallel with described slide rail 2, described top slide 4 one end and described connecting rod 5 are rotatably assorted, the other end is supported on described sliding seat 3 by spring supporting device, described top slide 4 is provided with the Finial device for clamping broaching tool towards the front end of described workbench 1, described workbench 1 is provided with at least two V shape irons 6, described sliding seat 3 is provided with the locking device for locking between sliding seat 3 and described connecting rod 5.
As shown in the figure, the sliding seat 3 of the broach straightening device of the present embodiment is L-type, one side of sliding seat 3 is parallel with workbench 1, connecting rod 5 is sleeved on the opposite side top of sliding seat 3, the front end of top slide 4 is provided with the through hole 7 for mounting spring bracing or strutting arrangement, on sliding seat 3, be provided with accordingly through hole 8 with this through hole 7, spring supporting device comprises the spring lever 9 being sleeved in through hole 7 and through hole 8, and spring 10 is sleeved on spring lever 9 and between sliding seat 3 and top slide 4, by spring supporting device is set, not only can support top slide 4, and make top slide 4 can take under external force connecting rod 5 as rotating shaft rotation.
The broach straightening device of the present embodiment is by two sliding seats 3 that slide rail 2 are set and coordinate with slide rail 2, single sliding seat 3 all can slide separately on slide rail, and after two sliding seats 3 being locked on connecting rod 5 by locking device, can synchronizing moving between two sliding seats 3, broaching tool by clamping on the Finial device of two top slides 4, and two top slides respectively together with sliding seat 3 along slide rail 2 synchronizing movings, can drive broaching tool to move left and right along slide rail 2 directions, and broaching tool also can overturn between Finial device, can on broaching tool, find easily the point that needs alignment; After finding the point that needs alignment, moved to below hammer, by broaching tool, to pressing down, because top slide 4 one end and connecting rod 5 are rotatably assorted, one end is supported by spring supporting device, under the downward pressure of weight, top slide 4 be take connecting rod 5 as rotating shaft rotation, and broaching tool is pressed between two V shape irons 6, continues to pressing down, broaching tool will occur bending and deformation, and finally reaches the object of alignment; Therefore, the broach straightening device of the present embodiment can not only find the point that needs alignment on broaching tool easily, and directly alignment on this broach straightening device, only needs disposable clamping in whole alignment process, not only alleviate workman's burden, and improved operating efficiency.
Preferably, described sliding seat 3 is provided with the chute 11 matching with described slide rail 2, between the two side of described chute 11 and chute 11 tops and described slide rail 2, be equipped with single-row radial ball bearing 12, and the two side of chute 11 and chute 11 tops are equipped with for being set with the core bar of single-row radial ball bearing 12, by chute 11 being set on sliding seat 3 and between chute 11 and slide rail 2, single-row radial ball bearing 12 being set, can make sliding seat 3 resistance to sliding on slide rail 2 less.
Preferably, between described slide rail 2 and described workbench 1, be also provided with slide rail regulating device, described slide rail regulating device comprises with described workbench 1 rear side and being fixedly connected with and L-shaped back-up block 13 and at least two adjusting slide rails 14 that are connected by threaded fastener with described slide rail 2, between described adjusting slide rail 14 and described back-up block 13, by threaded fastener, connect, further, described adjusting slide rail 14 is L-type, and on the two side of described adjusting slide rail 14, be respectively equipped with vertically the kidney-shaped button head screw hole I 15 that extends and along the kidney-shaped button head screw hole II 16 perpendicular to described slide rail 2 directions, described threaded fastener coordinates with the screwed hole being arranged on described slide rail 2 after extending through this kidney-shaped button head screw hole I 15, adjusting slide rail 14 and slide rail 2 are linked together, threaded fastener matches with the screwed hole being arranged on described back-up block 13 after extending through kidney-shaped button head screw hole II 16, adjusting slider 14 and back-up block 13 are linked together.Because screw hole I 15 and screw hole II 16 are all kidney-shaped circle, therefore can change respectively and regulate slide rail 14 and back-up block and regulate the fixed position between slide rail 14 and slide rail 2, and then the position up and down of adjusting slide rail 2, make the job requirement that can meet alignment broaching tool that is positioned at of slide rail 2, make broaching tool after clamping be positioned at the top of V shape iron 6.
Further, described locking device comprises lock handle 17 and is threaded with this lock handle 17 and is arranged on the locking hole 18 on described sliding seat 3, described locking hole 18 be arranged on described sliding seat 3 on and for being set with the connecting hole 19 of described connecting rod 5, communicate, by lock handle 17 is set, rotation lock handle 17, time connecting length between lock handle 17 and locking hole 18 elongated, can make lock handle 17 withstand on connecting rod 5, can prevent from, between connecting rod 5 and sliding seat 3, relative sliding occurs; Contrary, rotation lock handle 17, shortens the connecting length between lock handle 17 and locking hole 18, lock handle 17 and connecting rod 5 can be unclamped, and making can relative sliding between sliding seat 3 and connecting rod 5.
Further, described top slide 4 front ends are provided with for the installing hole 20 of Finial device is installed, described Finial device comprises the center sleeve 21 being sleeved in described installing hole 20 and is arranged on top 22 in center sleeve 21, described top 22 axis are parallel with described slide rail 2, between top slide 4 and center sleeve 21, be provided with stop screw, as shown in Figure 4.Finial device can also adopt another kind of structure: described Finial device comprises the center sleeve 21 that is sleeved in described installing hole 20, be arranged on top 22 in center sleeve 21 and for promote described top 22 and center sleeve 21 at the thrust unit sliding along installing hole 20 axial directions, described top 22 axis are parallel with described slide rail 2, between center sleeve 21 and top slide 4, be provided with stop screw, and center sleeve 21 is provided with for limiting thrust unit and promotes top 22 and the groove of center sleeve 21 movement travels, as shown in Figure 3.On two top slides 4, can adopt above-mentioned same Finial device, also can on two Finial devices 4, adopt respectively the Finial device of two kinds of different structures, all can meet the instructions for use of clamping broaching tool.On two top slides 4 of the broach straightening device of the present embodiment, be respectively equipped with two kinds of Finial devices.
Preferably, described thrust unit comprises the adjusting nut 23 being fixedly mounted in described center sleeve 21, the screw rod 24 coordinating with this adjusting nut 23, and the handwheel 25 being circumferentially fixedly connected with described screw rod 24 and the handle 26 that is arranged on handwheel 25 edges, between described screw rod 24 and described installing hole 20, be provided with rotary axle box 27 and be arranged on the bearing 28 between described screw rod 24 and described rotary axle box 27, making handwheel 25 rotary resistances less.When clamping broaching tool, shake the handwheel 25 of thrust unit, make top 22 to move forward and withstand broaching tool, while pulling down broaching tool, can make top 22 mobile separatedly with broaching tool backward, therefore, by being set, thrust unit can be convenient to clamping and the dismounting of broaching tool.
Preferably, be provided with bellmouth 29 and the tapered rod 30 cooperatively interacting between described center sleeve 21 and described top 22, the diameter of described bellmouth 29 and tapered rod 30 all successively decreases to the direction of afterbody along top 22 heads.To between center sleeve 21 and top 22, by pyramidal structure, coordinate, not only can bear and larger by broaching tool, act on the active force on top 22, and top 22 and center sleeve 21 between more easily to the dress of feeling at ease.
Preferably, described workbench 1 is provided with guide rail 31, described V shape iron 6 is provided with the slide block matching with described guide rail 31, by guide rail 31 and slide block are set, V shape iron 6 can be slided along the direction parallel with slide rail on workbench 1, also can adjust the distance between adjacent two V shape irons 6, facilitate broaching tool alignment, and the V shape iron 6 of the present embodiment is provided with two.
Introduce the procedure of the broach straightening device alignment broaching tool that adopts the present embodiment below.
According to broaching tool length, unclamp locking handgrip 17, regulate two top 22 position, make the distance between two top 22 a little longer than broach length, lock again two locking handgrips 17, now two sliding seats 3 just become can be on slide rail 2 integral body of synchronous slide, a mobile sliding seat 3, another sliding seat 3 also slides together; Two central aperture two of broaching tool are top, and swinging handle 26, drives handwheel 25 rotations, screw rod 24 is rotated and drive adjusting nut 23 to move, and center sleeve 21 is moved together with top 22, until top 22 withstand broaching tool centre bore.
Do not need by top 22 and broaching tool between push up too tightly, broaching tool can rotate between two top 22, also can move left and right with sliding seat 3, can on broaching tool, find easily the point that needs alignment; Find the point that needs alignment on broaching tool after, need the point of alignment to move to below hammer this, to pressing down, make top slide 4 take connecting rod 5 as rotating shaft is rotated down broaching tool, make to need on broaching tool the point of alignment to be arranged between two V shape irons 6; Broaching tool is depressed after certain distance, just acts directly on V shape iron 6, as shown in Figure 3, when broaching tool is depressed, weight is G to broaching tool active force, and two ends V shape iron 6 is given broaching tool opposition N, effect certain hour, broaching tool will occur bending and deformation, and finally reaches the object of alignment.
Finally explanation is, above embodiment is only unrestricted in order to technical scheme of the present invention to be described, although the present invention is had been described in detail with reference to preferred embodiment, those of ordinary skill in the art is to be understood that, can modify or be equal to replacement technical scheme of the present invention, and not departing from aim and the scope of technical solution of the present invention, it all should be encompassed in the middle of claim scope of the present invention.
Claims (8)
1. a broach straightening device, it is characterized in that: comprise workbench, be arranged on the slide rail of described workbench rear side, two sliding seats that are slidably matched with described slide rail and with described sliding seat one by one corresponding setting and respectively with described sliding seat along synchronization-moving two the top slides of slide rail direction, described two sliding seats are all sleeved on the connecting rod be arrangeding in parallel with described slide rail, described top slide one end and described connecting rod are rotatably assorted, the other end is supported on described sliding seat by spring supporting device, described top slide is provided with the Finial device for clamping broaching tool towards the front end of described workbench, described workbench is provided with at least two V shape irons, described sliding seat is provided with the locking device for sliding seat and the locking of described connecting rod,
Described locking device comprises lock handle and is threaded with this lock handle and is arranged on the locking hole on described sliding seat, described locking hole be arranged on described sliding seat on and for being set with the connecting hole of described connecting rod, communicate;
Described workbench is provided with guide rail, and described V shape iron is provided with the slide block matching with described guide rail.
2. broach straightening device according to claim 1, it is characterized in that: between described slide rail and described workbench, be also provided with slide rail regulating device, described slide rail regulating device comprises at least two adjusting slide rails and is fixedly connected with described workbench rear side and L-shaped back-up block, described adjusting slide rail is L-type, and on the two side of described adjusting slide rail, be respectively equipped with vertically the kidney-shaped button head screw hole I that extends and along the kidney-shaped button head screw hole II perpendicular to described slide rail direction, threaded fastener extends through this kidney-shaped button head screw hole I and kidney-shaped button head screw hole II matches with the screwed hole that is arranged on the screwed hole on described slide rail and be arranged on described back-up block respectively.
3. broach straightening device according to claim 2, it is characterized in that: described spring supporting device comprises spring lever and is sleeved on the spring on this spring lever, the two ends of described spring lever are set in the through hole being arranged on described sliding seat and top slide, and described spring is between described sliding seat and top slide.
4. broach straightening device according to claim 1, is characterized in that: described sliding seat is provided with the chute matching with described slide rail, between the two side of described chute and chute top and described slide rail, is equipped with single-row radial ball bearing.
5. broach straightening device according to claim 1, it is characterized in that: described top slide front end is provided with for the installing hole of Finial device is installed, described Finial device comprises the center sleeve that is sleeved in described installing hole and is arranged on top in center sleeve, and described top axis is parallel with described slide rail.
6. broach straightening device according to claim 1, it is characterized in that: described top slide front end is provided with for the installing hole of Finial device is installed, described Finial device comprises the center sleeve that is sleeved in described installing hole, be arranged on top in center sleeve and for promoting described top and center sleeve along installing hole thrust unit in axial sliding, described top axis is parallel with described slide rail.
7. broach straightening device according to claim 6, it is characterized in that: described thrust unit comprises the adjusting nut being fixedly mounted in described center sleeve, the screw rod coordinating with this adjusting nut, and the handwheel being circumferentially fixedly connected with described screw rod and be arranged on the handle at handwheel edge, between described screw rod and described installing hole, be provided with rotary axle box and be arranged on described screw rod and described rotary axle box between bearing.
8. according to the broach straightening device described in claim 5 or 6 or 7, it is characterized in that: described center sleeve and be describedly provided with bellmouth and the tapered rod cooperatively interacting between top, the diameter of described bellmouth and the tapered rod all direction along top head to afterbody successively decreases.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110413657.7A CN102513412B (en) | 2011-12-13 | 2011-12-13 | Broach straightening device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110413657.7A CN102513412B (en) | 2011-12-13 | 2011-12-13 | Broach straightening device |
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| Publication Number | Publication Date |
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| CN102513412A CN102513412A (en) | 2012-06-27 |
| CN102513412B true CN102513412B (en) | 2014-04-30 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201110413657.7A Active CN102513412B (en) | 2011-12-13 | 2011-12-13 | Broach straightening device |
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| CN110076471A (en) * | 2019-04-28 | 2019-08-02 | 北京德邦大为科技股份有限公司 | It is a kind of to stir the welder and welding method that mud button is stirred on slurry roller |
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| US4154073A (en) * | 1977-01-21 | 1979-05-15 | Renzo Galdabini | Automatic straightening machine |
| SU1189533A1 (en) * | 1984-01-09 | 1985-11-07 | Предприятие П/Я А-1944 | Arrangement for straightening shafts |
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| CN201988596U (en) * | 2010-12-17 | 2011-09-28 | 长春汇凯科技有限公司 | Floating centre |
| CN202343652U (en) * | 2011-12-13 | 2012-07-25 | 重庆工具厂有限责任公司 | Broaching tool straightening device |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JPH09151002A (en) * | 1995-12-04 | 1997-06-10 | Nisshin Steel Co Ltd | Wrinkle smoothing device of metallic belt |
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|---|---|---|---|---|
| GB351873A (en) * | 1930-03-01 | 1931-07-02 | Hurth Masch Zahnrad Carl | Improvements in apparatus for straightening shafts |
| SU405624A1 (en) * | 1971-04-05 | 1973-11-05 | Л. Ф. Кравченко, А. С. Форофонтов , В. А. Давыдов Оренбургское головное конструкторское бюро Гидропресс | DEVICE FOR EDITING PARTS TYPE OF SHAFTS |
| SU389863A1 (en) * | 1971-05-18 | 1973-07-11 | Экспериментальный научно исследовательский институт кузнечно прессового машиностроени | LIBRARY |
| US4154073A (en) * | 1977-01-21 | 1979-05-15 | Renzo Galdabini | Automatic straightening machine |
| SU1189533A1 (en) * | 1984-01-09 | 1985-11-07 | Предприятие П/Я А-1944 | Arrangement for straightening shafts |
| CN200942410Y (en) * | 2006-09-06 | 2007-09-05 | 长春试验机研究所 | Automatic shaft straihtener |
| CN101402110A (en) * | 2008-10-23 | 2009-04-08 | 浙江大学 | Numerical control aligning and classifying instrument for rotating shaft of series excited machine |
| CN201988596U (en) * | 2010-12-17 | 2011-09-28 | 长春汇凯科技有限公司 | Floating centre |
| CN202343652U (en) * | 2011-12-13 | 2012-07-25 | 重庆工具厂有限责任公司 | Broaching tool straightening device |
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| CN102513412A (en) | 2012-06-27 |
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