CN110587347A - Balanced elbow cutting clamp - Google Patents
Balanced elbow cutting clamp Download PDFInfo
- Publication number
- CN110587347A CN110587347A CN201910979376.4A CN201910979376A CN110587347A CN 110587347 A CN110587347 A CN 110587347A CN 201910979376 A CN201910979376 A CN 201910979376A CN 110587347 A CN110587347 A CN 110587347A
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- 238000005520 cutting process Methods 0.000 title claims abstract description 24
- 239000000463 material Substances 0.000 claims description 5
- 229910000831 Steel Inorganic materials 0.000 claims description 3
- 238000003825 pressing Methods 0.000 claims description 3
- 239000010959 steel Substances 0.000 claims description 3
- 238000010276 construction Methods 0.000 claims 1
- 238000005299 abrasion Methods 0.000 abstract description 3
- 238000003754 machining Methods 0.000 description 18
- 238000000034 method Methods 0.000 description 4
- 238000012545 processing Methods 0.000 description 4
- 230000008901 benefit Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000005266 casting Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000000725 suspension Substances 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000003139 buffering effect Effects 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 230000008520 organization Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 230000003746 surface roughness Effects 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
- B23Q3/00—Devices holding, supporting, or positioning work or tools, of a kind normally removable from the machine
- B23Q3/12—Devices holding, supporting, or positioning work or tools, of a kind normally removable from the machine for securing to a spindle in general
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Machine Tool Units (AREA)
Abstract
The invention provides a balance elbow cutting clamp which comprises a connecting disc, a chassis, a supporting frame, a front tip, a tail tip and a balancing weight. The connecting disc is connected with a main shaft of the universal machine tool; the chassis is fixed with the connecting disc; the supporting frame is matched with the chassis; the upper end clamping hole of the support frame is used for fixing a balance elbow workpiece, and the lower end center hole is matched with the front center and used for ensuring the high contact ratio of the center and the main shaft rotation center; one end of the tail center is arranged in a center hole of a tail seat of the machine tool, and the other end of the tail center is matched with the center hole of the workpiece; the two ends of the upper end clamping hole arm clamp and fix the non-machined cylindrical surface of the workpiece through a jacking screw and are locked through a locking nut. The invention reduces the magnitude of unbalanced moment as much as possible to achieve the best balance state, reduces the vibration and the abrasion to important parts such as machine tool bearings and the like, and prolongs the service life of the machine tool.
Description
Technical Field
The invention belongs to the technical field of cutting clamps, and particularly relates to a balance elbow cutting clamp.
Background
The balance elbow is a key part of a suspension system of an armored vehicle, is directly related to the performance of the whole vehicle, has large bearing capacity and severe working environment, is directly related to the passing capacity of the vehicle, is connected with a torsion shaft to bear the impact and vibration of various loads, reduces the impact of the vehicle on a vehicle body during motion, and is vital to keeping the stability of the vehicle in the driving process, improving the comfort of passengers and the maneuverability of the vehicle. The machining precision of the balance elbow directly influences the size of the assembly gap, the size of the assembly gap between the bogie wheel and the suspension device is one of main factors directly influencing the motion stability and the service life of the vehicle, and the collision force generated by the gap motion pair not only consumes the energy of a mechanical system, but also is a source of vibration and noise. The balance elbow is one of parts with high processing difficulty in the process of processing, the workpiece has a special structure, the self-weight eccentric structure is large, the technical research on the balance of a rotating part is involved, and when the workpiece is cut and rotated at a high speed, even if the workpiece has a small eccentric distance, a very large unbalanced centrifugal force can be caused. The original vehicle-type balance elbow is assembled by adopting a combined structure, while the new vehicle-type balance elbow adopts an integrally forged blank, the production process is improved, and the bearing capacity and the comprehensive mechanical property of the balance elbow are greatly improved. The shape of the balance elbow is special, the self weight is large, the eccentric structure is serious, unbalanced rotating force can be generated, the cutting force is not uniform, the abrasion of a positioning element is fast, and the size and the surface roughness are ultra-poor, so that a special cutting clamp needs to be designed. According to the requirements of a workpiece assembly drawing, bearings are required to be installed at two ends of the balance elbow, the requirement on assembly clearance is high, a new cutting clamp is required to be designed, the stability of the dynamic balance of the workpiece rotating at a high speed is enabled to reach the optimal state, vibration in the machining process is minimized, and the requirement on the machining precision of parts is guaranteed.
Disclosure of Invention
Technical problem to be solved
The invention provides a balance elbow cutting clamp, which aims to solve the technical problems that the operation of a workpiece is stable in the machining process, and the machining precision is within the allowable tolerance range of a drawing.
(II) technical scheme
In order to solve the technical problem, the invention provides a balance elbow cutting clamp which comprises a connecting disc, a chassis, a supporting frame, a front tip, a tail tip and a balancing weight; the connecting disc is connected with a main shaft of the universal machine tool through a central taper hole, so that the clamp is consistent with the rotation center of the machine tool; the base plate is matched with a boss of the connecting disc through the reference hole and is fixed with the connecting disc, so that the rotating center of the base plate is ensured to be coincided with the rotating center of the machine tool spindle; the center counter sinking of the support frame is matched with the boss of the chassis, the accurate position of the support frame is determined through the cylindrical pin, and the support frame is screwed with the chassis, so that the center of the support frame and the center of the chassis are accurately positioned; the support frame is provided with an upper end clamping hole and a lower end center hole, the upper end clamping hole is used for fixing a balance elbow workpiece, and the lower end center hole is matched with the front center and used for ensuring the high contact ratio of the center and the main shaft rotation center; one end of a tail center is arranged in a center hole of a machine tool tailstock, the other end of the tail center is matched with the center hole of a workpiece, one end of a part of the workpiece to be processed is connected with a support frame through a front center, and the other end of the part of the workpiece to be processed is connected with a machine tool rear tailstock through the tail center; the two ends of the upper end clamping hole arm clamp and fix the non-machined cylindrical surface of the workpiece through a jacking screw and are locked through a locking nut.
Further, the coaxiality of the front center and the tail center is not more than 0.02 mm.
Furthermore, a balancing weight and a fixing plate for pressing the balancing weight are arranged on the lower side of the chassis to balance unbalanced centrifugal force caused by self-weight eccentricity of the workpiece during rotation.
Further, 45 steel is selected as the material of the chassis, and the structure is in a disc shape.
Further, the support frame adopts the casting structure.
Furthermore, the material of the balancing weight is a lead block Pb6-4 which is in a semicircular arc shape, and the balancing weight is pressed tightly by a fixing plate after being overlapped and is screwed on the chassis through a bolt.
(III) advantageous effects
The invention provides a balance elbow cutting clamp which comprises a connecting disc, a chassis, a supporting frame, a front tip, a tail tip and a balancing weight; the connecting disc is connected with a main shaft of the universal machine tool through a central taper hole; the chassis is matched with a boss of the connecting disc through the reference hole and is fixed with the connecting disc; the center counter sinking of the support frame is matched and installed with the boss of the chassis; the upper end clamping hole of the support frame is used for fixing a balance elbow workpiece, and the lower end center hole is matched with the front center and used for ensuring the high contact ratio of the center and the main shaft rotation center; one end of a tail center is arranged in a center hole of a machine tool tailstock, the other end of the tail center is matched with the center hole of a workpiece, one end of a part of the workpiece to be processed is connected with a support frame through a front center, and the other end of the part of the workpiece to be processed is connected with a machine tool rear tailstock through the tail center; the two ends of the upper end clamping hole arm clamp and fix the non-machined cylindrical surface of the workpiece through a jacking screw and are locked through a locking nut.
The invention adjusts and calculates the assembly gravity center position of the clamp, so that the magnitude of the unbalanced moment is reduced as much as possible and approaches to zero, and the optimal balanced state is achieved. In the operation process of the clamp, the machining precision is ensured by keeping the stability of the operation process; in the machining process, vibration caused by unbalance when a workpiece rotates needs to be reduced to a machining allowable range, the vibration is reduced, meanwhile, the abrasion to important parts such as a machine tool bearing is reduced, the service life of a machine tool is prolonged, a good effect is achieved through use, the requirement on the machining precision of a balance shaft is met, the production requirement can be met, and great social benefit and economic benefit are created.
Drawings
FIG. 1 is a schematic view of a balanced elbow cutting fixture according to an embodiment of the present invention;
fig. 2 is a sectional view of the inside of a balance elbow cutting jig according to an embodiment of the present invention: (a) front view, (b) side view;
FIG. 3 is a schematic diagram of a chassis structure in a balanced elbow cutting fixture in accordance with an embodiment of the present invention: (a) a side view, (b) a front view;
FIG. 4 is a schematic diagram illustrating a support frame of the balanced elbow cutting fixture according to an embodiment of the present invention;
FIG. 5 is a schematic diagram of a weight member of the elbow cutting clamp according to an embodiment of the present invention.
Detailed Description
In order to make the objects, contents and advantages of the present invention clearer, the following detailed description of the embodiments of the present invention will be made in conjunction with the accompanying drawings and examples.
This embodiment proposes a balanced elbow cutting clamp, the structure of which is shown in fig. 1 and 2. The balance elbow cutting clamp mainly comprises a connecting disc 4, a chassis 1, a supporting frame 2, a front tip 7, a tail tip 8 and a balancing weight 5. The connecting disc 4 is connected with a main shaft of the universal machine tool through a central taper hole, plays a role in connection and positioning, and enables the clamp to be consistent with the rotation center of the machine tool. The chassis 1 serving as a base is matched with a boss of the connecting disc 4 through a reference hole and is fixed with the connecting disc 4 through a tightening screw 9, so that the chassis is connected with a machine tool spindle through the connecting disc 4, and the rotating center of the chassis 1 is enabled to be coincident with the rotating center of the machine tool spindle. The structure of the chassis 1 is as shown in fig. 3, a counter bore at the center of the support frame 2 is matched and installed with a boss of the chassis 1, the accurate position of the support frame 2 is determined by the upper and lower cylindrical pins 13, and the center of the support frame 2 and the center of the chassis 1 are accurately positioned by screwing the six first bolts 12 with the chassis 1. The support frame 2 is provided with an upper end clamping hole and a lower end tip hole, the upper end clamping hole plays a role of fixing the balance elbow workpiece 3 and is locked by a screw; the lower end center hole is matched with the front center 7 and used for ensuring the high contact ratio of the center and the main shaft rotation center; one end of the tail center 8 is arranged in a center hole of a tailstock of the machine tool, the other end of the tail center is matched with the center hole of the workpiece 3, and the coaxiality of the front center 7 and the tail center 8 is not more than 0.02 mm. One end of the part to be processed of the workpiece 3 is connected with the support frame 2 through a front tip 7, and the other end of the part to be processed is connected with a rear tailstock of the machine tool through a tail tip 8. The jacking screws 10 at the two ends of the clamping hole arm at the upper end of the support frame 2 can be finely adjusted and locked through the locking nuts 11, the screw locking structure is adopted for convenient and quick adjustment, the non-processing cylindrical surface of the fixed workpiece 3 can be fully clamped, the dynamic balance stability of the workpiece rotating at a high speed is enabled to reach the optimal state, the vibration in the machining process is minimized, and the machining precision requirement of the workpiece is guaranteed.
The support frame 2 has compact structure size, is easy to arrange, install and adjust, and is simple, light and economic. Because balance elbow work piece 3 structure is more special, and rotatory eccentricity is great, can arouse great unbalanced centrifugal force during rotatory, can produce great vibration during processing, seriously influence the machining precision, and the while is great to the wearing and tearing of lathe bearing, seriously influences the life of lathe. It is necessary to add appropriate counterweights to ensure that the centre of rotation of the chassis 1 is on the axis of rotation of the machine. Therefore, in the embodiment, the counterweight 5 and the fixing plate 6 for pressing the counterweight 5 are installed on the lower side of the chassis 1 to balance the unbalanced centrifugal force caused by the dead weight eccentricity of the workpiece 3 during rotation, so that the workpiece 3 is ensured to run stably in the machining process, and the machining precision is within the allowable tolerance range of the drawing.
In this embodiment, the structure of the jig directly affects the steady state of the workpiece during rotational machining. The chassis 1 is connected with a machine tool spindle through the connecting disc 4, the rotating center of the chassis 1 can be guaranteed to be concentric with the machine tool spindle, meanwhile, the chassis 1 is also a rotating part with a certain rotating speed, the structure of the chassis requires that the material organization is uniform, the appearance error is small, and the assembly error is reduced as far as possible, so that 45 steel is selected as the material of the chassis 1, and the structure adopts a disc shape, thereby being beneficial to analysis and calculation of a dynamic balance state.
In addition, as shown in fig. 4, the supporting frame 2 is made of a casting structure, and has good buffering and shock absorbing performance. The supporting frame 2 is installed on the chassis 1 through the first bolt 12, two cylindrical pins 13 are used for positioning, a phi 40mm lower end center hole is machined after the supporting frame 2 is installed, so that the center of a machine tool is enabled to coincide with the rotation center of the clamp, two sides and the top of an upper end clamping hole of the supporting frame 2 are respectively provided with a jacking screw 10 and a locking nut 11, the non-machining surface of the workpiece 3 is clamped, stability in the machining process is kept, and the requirement of machining precision is met.
In this embodiment, the weight member 5 is made of lead Pb6-4, as shown in fig. 5, and has a semicircular arc shape, and tens of weight members are stacked and then pressed by the fixing plate 6 and screwed to the chassis 1 by the second bolt 14.
The above description is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, several modifications and variations can be made without departing from the technical principle of the present invention, and these modifications and variations should also be regarded as the protection scope of the present invention.
Claims (6)
1. A balance elbow cutting clamp is characterized by comprising a connecting disc, a chassis, a supporting frame, a front tip, a tail tip and a balancing weight; wherein,
the connecting disc is connected with a main shaft of the universal machine tool through a central taper hole, so that the clamp is consistent with the rotation center of the machine tool; the base plate is matched with a boss of the connecting disc through the reference hole and is fixed with the connecting disc, so that the rotating center of the base plate is enabled to be coincided with the rotating center of the machine tool spindle; the center counter sinking hole of the support frame is matched with the boss of the chassis, the accurate position of the support frame is determined through the cylindrical pin and is screwed with the chassis, and the accurate positioning of the center of the support frame and the center of the chassis is ensured; the supporting frame is provided with an upper end clamping hole and a lower end center hole, the upper end clamping hole is used for fixing the balance elbow workpiece, and the lower end center hole is matched with the front center and used for ensuring the high contact ratio of the center and the main shaft rotation center; one end of a tail center is arranged in a center hole of a machine tool tailstock, the other end of the tail center is matched with the center hole of a workpiece, one end of a part of the workpiece to be processed is connected with a support frame through a front center, and the other end of the part of the workpiece to be processed is connected with a machine tool rear tailstock through the tail center; the two ends of the upper end clamping hole arm clamp and fix the non-machined cylindrical surface of the workpiece through a jacking screw and are locked through a locking nut.
2. The cutting fixture of claim 1, wherein the leading point and the trailing point are not more than 0.02mm coaxial.
3. The cutting jig of claim 1, wherein a weight and a fixing plate for pressing the weight are installed at a lower side of the base plate to balance an unbalanced centrifugal force caused by the self-weight eccentricity of the workpiece when rotating.
4. The cutting fixture of claim 1, wherein the material of the base plate is 45 steel, and the structure is in a shape of a circular disk.
5. The cutting fixture of claim 1, wherein the support frame is of cast construction.
6. The cutting jig of claim 1, wherein the weight block is made of a lead block Pb6-4 in a semicircular arc shape, and a plurality of blocks are stacked and pressed by the fixing plate and screwed to the base plate by bolts.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910979376.4A CN110587347A (en) | 2019-10-15 | 2019-10-15 | Balanced elbow cutting clamp |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910979376.4A CN110587347A (en) | 2019-10-15 | 2019-10-15 | Balanced elbow cutting clamp |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110587347A true CN110587347A (en) | 2019-12-20 |
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ID=68867389
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910979376.4A Pending CN110587347A (en) | 2019-10-15 | 2019-10-15 | Balanced elbow cutting clamp |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110587347A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111230551A (en) * | 2020-01-22 | 2020-06-05 | 南京信息职业技术学院 | Special-shaped lever part turning clamp |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0537403U (en) * | 1991-10-17 | 1993-05-21 | 大昭和精機株式会社 | Rotating center for cylindrical grinder |
| CN204262858U (en) * | 2014-11-24 | 2015-04-15 | 江麓机电集团有限公司 | A kind of eccentric part processing unit (plant) |
| CN105058136A (en) * | 2015-08-19 | 2015-11-18 | 英瑞克自动化有限公司 | Eccentric shaft clamping positioner |
| CN208358580U (en) * | 2018-06-14 | 2019-01-11 | 陕西秦川格兰德机床有限公司 | Eccentric work piece processing lathe polygamy pouring weight adjusting type counter weight device |
| CN109482905A (en) * | 2018-11-13 | 2019-03-19 | 北京星航机电装备有限公司 | A kind of the processing clamping tooling and processing method of balance arm structure |
| CN211305637U (en) * | 2019-10-15 | 2020-08-21 | 北京北方车辆集团有限公司 | Balanced elbow cutting clamp |
-
2019
- 2019-10-15 CN CN201910979376.4A patent/CN110587347A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0537403U (en) * | 1991-10-17 | 1993-05-21 | 大昭和精機株式会社 | Rotating center for cylindrical grinder |
| CN204262858U (en) * | 2014-11-24 | 2015-04-15 | 江麓机电集团有限公司 | A kind of eccentric part processing unit (plant) |
| CN105058136A (en) * | 2015-08-19 | 2015-11-18 | 英瑞克自动化有限公司 | Eccentric shaft clamping positioner |
| CN208358580U (en) * | 2018-06-14 | 2019-01-11 | 陕西秦川格兰德机床有限公司 | Eccentric work piece processing lathe polygamy pouring weight adjusting type counter weight device |
| CN109482905A (en) * | 2018-11-13 | 2019-03-19 | 北京星航机电装备有限公司 | A kind of the processing clamping tooling and processing method of balance arm structure |
| CN211305637U (en) * | 2019-10-15 | 2020-08-21 | 北京北方车辆集团有限公司 | Balanced elbow cutting clamp |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111230551A (en) * | 2020-01-22 | 2020-06-05 | 南京信息职业技术学院 | Special-shaped lever part turning clamp |
| CN111230551B (en) * | 2020-01-22 | 2021-07-20 | 南京信息职业技术学院 | Special-shaped lever part turning clamp |
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