CN112846296A - Variable center distance positioning device and connecting rod fine boring clamp using same - Google Patents
Variable center distance positioning device and connecting rod fine boring clamp using same Download PDFInfo
- Publication number
- CN112846296A CN112846296A CN202110009677.1A CN202110009677A CN112846296A CN 112846296 A CN112846296 A CN 112846296A CN 202110009677 A CN202110009677 A CN 202110009677A CN 112846296 A CN112846296 A CN 112846296A
- Authority
- CN
- China
- Prior art keywords
- piece
- centering
- workpiece
- matching
- driving
- 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.)
- Granted
Links
- 230000007246 mechanism Effects 0.000 claims abstract description 82
- 238000003825 pressing Methods 0.000 claims description 48
- 238000000034 method Methods 0.000 claims description 11
- 230000008569 process Effects 0.000 claims description 11
- 230000002093 peripheral effect Effects 0.000 claims description 8
- 230000013011 mating Effects 0.000 claims description 7
- 230000009471 action Effects 0.000 claims description 4
- 238000003754 machining Methods 0.000 abstract description 9
- 238000001514 detection method Methods 0.000 description 7
- 238000004519 manufacturing process Methods 0.000 description 4
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000008859 change Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B41/00—Boring or drilling machines or devices specially adapted for particular work; Accessories specially adapted therefor
-
- 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
- B23Q3/02—Devices holding, supporting, or positioning work or tools, of a kind normally removable from the machine for mounting on a work-table, tool-slide, or analogous part
- B23Q3/06—Work-clamping means
- B23Q3/08—Work-clamping means other than mechanically-actuated
- B23Q3/082—Work-clamping means other than mechanically-actuated hydraulically actuated
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Jigs For Machine Tools (AREA)
Abstract
The invention discloses a variable center distance positioning device and a connecting rod fine boring clamp using the same, wherein a workpiece is at least supported and positioned by two centering mechanisms, and in at least one centering mechanism: the matching piece can rotate relative to the supporting piece, and the matching piece is eccentrically arranged relative to the rotation center of the supporting piece and the centers of the supporting surfaces of the plurality of the branch centering pieces, so that the center distance between the two branch centering mechanisms in jacking is changed. The invention provides a variable center distance positioning device, wherein a centering piece is driven by a first driving piece and a butting piece to center and position a connecting rod hole, so that the hole is superposed with the center of a centering mechanism, and a boring cutter corresponds to the center of the centering mechanism before machining, so that the centering mechanism does not need to perform tool resetting during each machining and only needs to rotate a matching piece when the centering mechanism needs to be adjusted to clamp the center distance, namely, a set of positioning device is used for clamping connecting rods with different center distances, and the device can be used for positioning any workpiece with multiple holes.
Description
Technical Field
The invention relates to the technical field of machining, in particular to a center distance variable positioning device.
Background
The connecting rod is used as an important connecting mechanism of an automobile engine, the connecting rod is connected with a crankshaft of a piston of a shell, the stress of the piston is transmitted to the crankshaft, so that the crankshaft is driven to rotate at a high speed, the manufacturing precision of the connecting rod is required to be very high, the radial precision of a large hole and a small hole of the connecting rod, the central local precision between the large hole and the small hole and the verticality of the large hole, the small hole and an end face are generally required to be ensured, two side faces are finely ground after rough machining to ensure the parallelism, then boring machining is carried out on a boring machine, and the radial precision of the large hole and the small hole, the central local precision between the large hole.
The connecting rod positioning and clamping is followed and the finish boring processing is carried out, if the connecting rod with different center distances is replaced, different clamps need to be correspondingly designed, the process cost is improved, and if a plurality of machine tools cannot be provided, the clamps need to be replaced in each use, and the clamps are troublesome to replace and time-consuming and are not beneficial to batch processing.
Therefore, a positioning device capable of positioning connecting rods with different center distances is needed.
Disclosure of Invention
The invention aims to overcome the technical defects and provide a variable center distance positioning device, which is used for solving the problem that one clamp in the prior art is only suitable for clamping one type of center distance connecting rod.
In order to achieve the technical purpose, the technical scheme of the invention is as follows: a center distance variable positioning device is used for positioning a workpiece and comprises a supporting piece and a centering mechanism fixedly connected with the supporting piece, wherein: the middle mechanism comprises a first driving piece, a matching piece, a butting piece and a middle piece, wherein the matching piece is provided with a first sliding hole and a plurality of second sliding holes which are circumferentially arranged along the first sliding hole, one end of the butting piece is provided with a first matching part corresponding to the second sliding holes, the butting piece is in sliding connection with the first sliding holes, the plurality of middle pieces are respectively in sliding connection with the plurality of second sliding holes, one end of the middle piece is provided with a second matching part, the other end of the middle piece is provided with a butting part, the first matching part is in sliding connection with the second matching part, the second matching part is arranged at an included angle with the sliding direction of the butting piece relative to the matching piece relative to the sliding direction of the first matching part, so that when the butting piece slides along the first sliding hole, the butting piece drives the plurality of middle pieces to respectively slide along the corresponding second sliding holes, in the sliding process, the plurality of butting parts are always positioned on a circular butting face with the same circle center, the first driving piece is arranged between the butting piece and the butting piece, so as to drive the abutting part to slide, thereby enabling the plurality of abutting parts to abut against one peripheral surface of the workpiece; the workpiece is supported and positioned by at least one centering mechanism, and in at least one centering mechanism: the matching piece can rotate relative to the supporting piece, and the matching piece is eccentrically arranged relative to the rotation center of the supporting piece and the circle centers of the supporting surfaces of the plurality of centering pieces, so that the center distance of supporting between the centering mechanisms is changed.
Preferably, the number of the centering mechanisms for positioning the workpiece is two, wherein a fitting piece of one centering mechanism is fixedly connected with the supporting piece, and a fitting piece of the other centering mechanism is fixedly connected with the supporting piece in a relatively rotatable manner.
Preferably, the number of the middle dividing pieces of one middle dividing mechanism is two, and the number of the other middle dividing mechanism is three.
The invention also provides a connecting rod fine boring clamp which is used for positioning and clamping a workpiece and comprises the variable center distance positioning device, a fixing part, a clamping part, an anti-falling mechanism and a second driving part, wherein: the second driving piece is used for driving the variable center distance positioning device to slide relative to the fixed piece and enabling the centering mechanism to axially separate from the workpiece jacking along the jacked peripheral surface of the centered piece of the workpiece; the clamping piece is fixedly connected with the fixing piece and pushes the workpiece against the fixing piece to fix the workpiece; the anti-falling mechanism comprises a guide part, a pressing part and a third driving part, the guide part is fixedly connected with the fixing part, the guide part is provided with a third sliding hole and a matching groove arranged on the peripheral side of the third sliding hole, one end of the pressing part is abutted against the supporting part, the other end of the pressing part is abutted against a workpiece, a matching table is formed on the side surface of the pressing part and slides along the matching groove, the third driving part is connected with the pressing part and is used for driving the pressing part to move along the clamping direction of the clamping part, and at least part of the matching groove is obliquely arranged so that the pressing part and the guide part can relatively slide and relatively rotate; and in the process that the second driving piece is axially separated from the workpiece and is pushed and held by the workpiece along the pushed and held peripheral surface of the workpiece, the pressing piece slides along the matching groove under the action of the third driving piece, so that the pressing piece rotates and is pressed against the side surface of the workpiece.
Preferably, the fixing part comprises a fixing plate and a positioning block, one side of the positioning block is fixedly connected with the fixing plate, the other opposite side of the positioning block is provided with an air detection hole, and the workpiece is placed on the air detection hole.
Preferably, the anti-falling mechanism further comprises an anti-falling rod, and the anti-falling rod is fixedly connected with the fixing piece and used for preventing the workpiece from falling off from two sides after being pressed by the pressing piece.
Preferably, the clamping member includes a fourth driving member and a pressing block, one end of the fourth driving member is fixedly connected with the fixing member, and the other end of the fourth driving member is fixedly connected with the pressing block.
Preferably, the fourth driving member is a corner hydraulic cylinder.
Compared with the prior art, the invention has the beneficial effects that: the invention provides a variable center distance positioning device, wherein a centering piece is driven by a first driving piece and a butting piece to center and position a connecting rod hole, so that the hole is superposed with the center of a centering mechanism, and a boring cutter corresponds to the center of the centering mechanism before machining, so that the centering mechanism does not need to perform tool resetting during each machining and only needs to rotate a matching piece when the centering mechanism needs to be adjusted to clamp the center distance, namely, a set of positioning device is used for clamping connecting rods with different center distances, and the device can be used for positioning any workpiece with multiple holes.
Drawings
FIG. 1 is a top view of a variable center-to-center positioning apparatus provided by the present invention;
FIG. 2 is a front view of a variable center-to-center positioning apparatus provided by the present invention;
FIG. 3 is a front and side view of a centering member of the variable center distance positioning apparatus provided in the present invention;
FIG. 4 is a top view and a front view of two supports of the variable center distance positioning device provided by the present invention;
FIG. 5 is a cross-sectional view and a top view of an eccentric mating member of the variable center distance positioning device provided by the present invention;
FIG. 6 is a cross-sectional view and a top view of a non-eccentric mating member of the variable center distance positioning device of the present invention at two different angles;
FIG. 7 is a front view of a connecting rod fine boring fixture provided by the present invention;
FIG. 8 is a partial top view of the connecting rod fine boring fixture provided in the present invention in a clamped and unclamped state, respectively;
FIG. 9 is a partial front view of the connecting rod fine boring fixture of the present invention with the clamp open (with the fixed plate hidden);
FIG. 10 is a partial front view of the clamp of the connecting rod fine boring fixture of the present invention as compressed (with the fixed plate hidden);
FIG. 11 is a partial cross-sectional view of the anti-drop mechanism of the connecting rod fine boring fixture provided by the present invention;
FIG. 12 is a top view, a cross-sectional view, and an elevation view of a guide of a connecting rod fine boring fixture provided by the present invention;
FIG. 13 is a cross-sectional view and an elevation view of a retainer block of the connecting rod fine boring fixture provided in the present invention;
reference numerals: 1-lifting piece, 2-centering mechanism, 3-fixing piece, 4-clamping piece, 5-anti-falling mechanism, 6-second driving piece, 7-driving connecting block, 11-supporting plate, 12-centering connecting shaft, 21-first driving piece, 22-matching piece, 23-abutting piece, 24-centering piece, 25-pressing plate, 31-fixing plate, 32-guide sleeve, 33-positioning block, 41-fourth driving piece, 42-abutting piece, 51-guide piece, 52-abutting piece, 53-third driving piece, 54-anti-falling rod, 55-blocking ring, 56-connecting piece, 121-pressure relief hole, 221-first sliding hole, 222-second sliding hole, 231-first matching part, 241-second matching part, 242-top supporting part, 331-air checking hole, 511-third sliding hole, 512-matching groove and 521-matching table.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Referring to fig. 1, the present embodiment provides a variable center distance positioning apparatus for positioning a workpiece, which includes a supporting member 1 and a centering mechanism 2, wherein:
the centering mechanism 2 is fixedly connected with the supporting member 1, and the centering mechanism 2 comprises a first driving member 21, a fitting member 22, a holding member 23 and a centering member 24.
Specifically, in the present embodiment, the supporting member 1 includes a supporting plate 11 and a centering shaft 12, one end of the centering shaft 12 is fixedly connected to the supporting plate 11, and the other end is provided with a groove in sliding and rotating connection with the mating member 22 or a groove in threaded connection with the mating member 22.
The fitting member 22 is provided with a first sliding hole 221 and a plurality of second sliding holes 222 circumferentially arranged along the first sliding hole 221, one end of the abutting member 23 forms a first fitting portion 231 corresponding to the second sliding holes 222, the abutting member 23 is slidably connected with the first sliding hole 221, the plurality of centering members 24 are slidably connected with the plurality of second sliding holes 222, one end of the centering member 24 forms a second fitting portion 241, the other end forms a top holding portion 242, the first fitting portion 231 is slidably connected with the second fitting portion 241, the first fitting portion 231 and the second fitting portion 241 can generally adopt the fit of a boss and a groove, the cross-sectional shape is not limited, but the profile thereof is matched, preferably, the first fitting portion 231 is a "T" shaped groove, the second fitting portion 241 is a "T" shaped boss, and the second fitting portion 241 is arranged in the sliding direction of the abutting member 231 relative to the first fitting portion 231 and the sliding direction of the abutting member 23 relative to the fitting member 22, so that when the abutting member 23 slides along the first sliding hole 221, the supporting member 23 drives the plurality of centering members 24 to slide along the corresponding second sliding holes 222, and in the sliding process, the plurality of supporting portions 242 are always located on the circular supporting surface with the same center of circle, in this embodiment, in order to ensure that the supporting portions 242 are always located on the circular supporting surface with the same center of circle during sliding, the central axis of the supporting surface is the central axis of the supporting member 23, and the second sliding holes 222 point to the central axis, and in the process of sliding the supporting member 23 for a certain distance, each centering member 24 connected with the supporting member 23 is displaced the same, so that the included angles between the first matching portion 231 and the second matching portion 241 and the axis are the same, which can greatly reduce the manufacturing difficulty. It is easy to understand that the central axis of the abutting surface is not necessarily the central axis of the abutting member 23, and the second sliding hole 222 does not necessarily point to the central axis of the abutting surface, so that in the process of sliding the abutting member 23 for a certain distance, the displacements of each of the centering members 24 connected to the abutting member 23 are not necessarily the same, and the included angles between the first matching portion 231 and the second matching portion 241 and the axial line may also be different, but the implementation difficulty is high, and the production and manufacturing are not easy.
The first driving member 21 is disposed between the supporting member 1 and the abutting member 23 to drive the abutting member 23 to slide, so that the plurality of abutting portions 242 abut against a peripheral surface of the workpiece. In this embodiment, the first driving member 21 is a spring, one end of the first driving member 21 abuts against the centering connecting shaft 12, and the other end abuts against the abutting member 23, the first driving member 21 may also be a hydraulic cylinder, and in addition, in order to prevent the abutting member 23 from being separated from the fitting member 22, a shoulder may be processed at one end of the fitting member 22 to limit the abutting member 23, and in this embodiment, a pressing plate 25 is fixedly connected with the abutting member 23 to limit the position.
The workpiece is at least supported and positioned by the two-part centering mechanism 2, and in at least one of the two-part centering mechanism 2: the fitting piece 22 can rotate relative to the supporting piece 1, and the fitting piece 22 is eccentrically arranged relative to the rotation center of the supporting piece 1 and the center of the jacking surface circle of the plurality of centering pieces 24, so that the jacking center distance between the centering mechanisms 2 is changed. It is easy to understand that the positioning device with variable center distance can be used for positioning any workpiece with two holes, and the abutting part can abut against the inner side surface of the workpiece and also can clamp the outer side surface of the workpiece, and in this embodiment, the workpiece is a connecting rod, each connecting rod is positioned by two centering mechanisms 2, wherein a mating piece 22 of one centering mechanism 2 is fixedly connected with the centering connecting shaft 12, and in this embodiment, the connecting rod is in threaded connection; the fitting piece 22 and the centering connecting shaft 12 in the other centering mechanism 2 can rotate relatively, and are fixedly connected through bolts, when the same variable center distance positioning device is used for clamping connecting rods with different center distances, only the connecting bolts of the fitting piece 22 and the centering connecting shaft 12 are needed to be loosened, the fitting piece 22 is rotated at a proper angle to fix the fitting piece 22 and the centering connecting shaft 12, and the connecting bolts can be fixed after rotation.
In order to ensure the air pressure balance at the two sides of the abutting piece 23, the centering connecting shaft 12 should be provided with a pressure relief hole 121 to communicate with the outside, otherwise, the side of the abutting piece 23 far away from the centering piece 24 is sealed, which may cause the abutting piece 23 to be unable to slide.
In addition, in the present embodiment, the number of the centering members 24 of one centering mechanism 2 is two, and the number of the other centering mechanism 2 is three. Essentially, the centering mechanism 2 mainly functions in positioning to ensure that the boring cutter has the smallest radial processing amount along the connecting rod during the fine boring processing of the connecting rod, and the fine processing must ensure the small feeding amount. Generally, if the number of the center-dividing pieces 24 of the center-dividing mechanism 2 is two, the positioning of the connecting rods can be realized, however, because the two centering mechanisms 2 are not rigidly pressed on the connecting rods, accurate positioning cannot be realized, if the centering pieces 24 of the two centering mechanisms 2 are three, each centering mechanism 2 can respectively realize positioning of large holes and small holes of the connecting rods, but if the error of the center distance of the connecting rods is large, this would result in the centering mechanism 2 having the centering element 24 not abutting against the inner side surface of the connecting rod, resulting in inaccurate positioning, both of which would result in inconsistent positioning, but the error can be controlled within the maximum allowable feeding amount of the boring cutter, preferably, one positioning mechanism is used for accurately positioning the corresponding connecting rod hole, the other positioning mechanism is used for limiting the rotation of the connecting rod, that is, one centering mechanism 2 includes two centering members 24, and the other centering mechanism 2 includes three centering members 24.
The invention also provides a connecting rod fine boring fixture, which is used for positioning and clamping a workpiece and is characterized by comprising the variable center distance positioning device, a fixing part 3, a clamping part 4, an anti-falling mechanism 5 and a second driving part 6, wherein:
the variable center distance positioning device is connected with the fixing part 3 in a sliding manner, specifically, the fixing part 3 comprises a fixing plate 31, a guide sleeve 32 and a positioning block 33, the guide sleeve 32 is fixed on the fixing plate 31, the guide sleeve 32 is connected with the centering connecting shaft 12 in a sliding manner, the second driving part 6 is used for driving the variable center distance positioning device to slide relative to the fixing part 3, in the embodiment, the second driving part 6 is a hydraulic cylinder, one end of the hydraulic cylinder is fixed on the fixing plate 31, the other end of the hydraulic cylinder is fixed on the supporting plate 11 through a driving connecting block 7, a driving shaft of the second driving part 6 is connected with the driving connecting block 7 in a threaded manner, the driving connecting block 7 is fixedly connected with the supporting plate 11, all the plurality of fixed connections can adopt bolt connections, therefore, the supporting plate 11 can be driven to move along the guide sleeve 32, the centering mechanism 2 is axially separated from being supported with the, the other opposite side is provided with an air detection hole 331, the workpiece is arranged on the air detection hole 331, the air detection hole 331 is connected with an air source or negative pressure, when the air detection hole 331 is blocked by the connecting rod in a pressing way, the air pressure therein changes, the other end of the air detection hole is connected with an air pressure sensor, and whether the connecting rod is arranged on the positioning block 33 or not is judged through the air pressure change.
The clamping member 4 is fixedly connected with the fixing member 3 and presses the workpiece against the fixing member 3 to fix the workpiece, specifically, the clamping member 4 includes a fourth driving member 41 and a pressing block 42, the fourth driving member 41 is a corner hydraulic cylinder which rotates and then presses down when working, therefore, when the connecting rod is installed, the pressing block 42 does not obstruct the connecting rod from being installed in the centering mechanism 2, one end of the fourth driving member 41 is fixed on the fixing plate 31, and the other end of the fourth driving member is connected with the pressing block 42 and presses the connecting rod against the positioning block 33.
The anti-drop mechanism 5 includes a guide 51, a pressing member 52 and a third driving member 53, the guide 51 is fixedly connected with the fixing member 3, the guide 51 is provided with a third sliding hole 511 and a matching groove 512 arranged on the peripheral side of the third sliding hole 511, one end of the pressing member 52 is pressed against the supporting member 1, the other end of the pressing member is pressed against the workpiece, a matching table 521 is formed on the side surface of the pressing member 52, the matching table 521 slides along the matching groove 512, the third driving member 53 is connected with the pressing member 52 and used for driving the pressing member 52 to move along the clamping direction of the clamping member 4, the matching groove 512 is at least partially arranged in an inclined manner, so that the pressing member 52 and the guide 51 relatively slide and relatively rotate at the same time, in this embodiment, the third. Specifically, the anti-disengaging mechanism 5 further includes a retaining ring 55 and a connecting member 56, the connecting member 56 and the guiding member 51 are both sleeved on the pressing member 52, and the connecting member 56 and the guiding member 51 are fixed on the fixing plate 31 by bolts, the third driving member 53 is sleeved on the pressing member 52 and disposed between two retaining rings 55, and the two retaining rings 55 are sleeved on the pressing member 52 and disposed between the matching platform 521 and a shoulder of the connecting member 56, so as to limit the retaining rings 55 and the third driving member 53.
In a preferred embodiment, the retaining mechanism 5 further includes a retaining rod 54, and the retaining rod 54 is fixedly connected to the fixing member 3 and used for preventing the workpiece from falling off to both sides after being pressed by the pressing member 52.
In the process that the second driving member 6 is axially separated from the workpiece by the centering member 24 and is pushed against the workpiece, the pressing member 52 slides along the matching groove 512 under the action of the third driving member 53, so that the pressing member 52 rotates and presses against the side surface of the workpiece. That is, in the process that the second driving member 6 drives the supporting plate 11 to move, the centering member 24 gradually disengages from abutting against the inner side surface of the connecting rod, due to the action of the third driving member 53, the pressing member 52 keeps abutting against the supporting plate 11 and moves along with the supporting plate 11, meanwhile, the matching table 521 slides along the matching groove 512, the pressing member 52 rotates while sliding towards the connecting rod, and finally abuts against the side surface of the connecting rod.
The working process of the connecting rod fine boring clamp provided by the invention is described in detail as follows: at the initial position, the centering mechanism 2 is relatively extended, the centering piece 24 is just positioned at one side of the positioning block 33 at the moment, the connecting rod is respectively installed corresponding to the centering mechanisms 2, because the inner side surface of the connecting rod is provided with a chamfer, the movable range of the centering piece 24 is smaller, the contact part of the centering piece 24 and the connecting rod is also provided with a chamfer, the chamfer at the inner side of the connecting rod is just in chamfer contact with the centering piece 24 at the moment, the connecting rod can be pressed into the centering mechanism 2 by manually applying pressure to the connecting rod to complete the positioning of the connecting rod, at the moment, the fourth driving piece 41 can be started to press the connecting rod against the positioning block 33 to complete the clamping of the connecting rod, at the moment, the second driving piece 6 can be started, the supporting plate 11 is driven by the second driving piece 6 to move and drive the centering mechanism 2 to be separated from the connecting rod, meanwhile, the pressing piece 52 slides and rotatably presses against the side surface, and a signal is sent to a machine tool, the connecting rod is judged to be arranged at the position, namely, the fine boring processing is carried out on the connecting rod at the position, if the connecting rod is not arranged at the position, the processing at the position is skipped, after the processing is finished, the fourth driving part 41 is directly loosened, because the anti-drop rod 54 is arranged at the two ends of the connecting rod, the connecting rod cannot fall off, in addition, the pressing part 52 is pressed, the connecting rod cannot topple, when the connecting rod needs to be taken out, the pressing part 52 only needs to be rotated to be separated from the pressing connecting rod, and after the connecting rod is completely taken out, the second driving part 6 is reset to wait.
In summary, the invention provides a variable center distance positioning device, wherein a centering member is driven by a first driving member and a supporting member to center and position a connecting rod hole, so that the hole coincides with the center of a centering mechanism, and a boring cutter corresponds to the center of the centering mechanism before machining, therefore, the centering mechanism does not need to perform tool setting again during each machining, and a matching member is rotated when the centering mechanism needs to be adjusted to clamp the center distance, namely, a set of positioning device is used for clamping connecting rods with different center distances, and in addition, the device can also be used for positioning any workpiece with multiple holes. The connecting rod fine boring fixture comprises a centering mechanism, a clamping piece and a fixing piece, wherein the centering mechanism is arranged on the side surface of the connecting rod, the clamping piece is connected with the fixing piece through a connecting rod, the connecting rod is connected with the centering mechanism through a connecting rod, and the connecting rod is connected with the centering mechanism through a connecting rod.
The above embodiments of the present invention should not be construed as limiting the scope of the present invention. Any other corresponding changes and modifications made according to the technical idea of the present invention should be included in the protection scope of the claims of the present invention.
Claims (8)
1. A center distance variable positioning device is used for positioning a workpiece and is characterized by comprising a supporting piece and a centering mechanism fixedly connected with the supporting piece, wherein:
the centering mechanism comprises a first driving piece, a matching piece, a supporting piece and a centering piece, wherein the matching piece is provided with a first sliding hole and a plurality of second sliding holes which are circumferentially arranged along the first sliding hole, one end of the supporting piece is provided with a first matching part corresponding to the second sliding holes, the supporting piece is in sliding connection with the first sliding holes, the centering pieces are respectively in sliding connection with the second sliding holes, one end of the centering piece is provided with a second matching part, the other end of the centering piece is provided with a propping part, the first matching part is in sliding connection with the second matching part, the second matching part is arranged at an included angle relative to the sliding direction of the first matching part and the sliding direction of the supporting piece relative to the matching piece, so that when the supporting piece slides along the first sliding hole, the supporting piece drives the centering pieces to respectively slide along the corresponding second sliding holes, in the sliding process, the plurality of jacking parts are always positioned on a circular jacking surface with the same circle center, and the first driving piece is arranged between the supporting piece and the abutting piece so as to drive the abutting piece to slide, so that the plurality of jacking parts can jack one peripheral surface of the workpiece;
the workpiece is supported and positioned by at least two centering mechanisms, and in at least one centering mechanism: the matching piece can rotate relative to the supporting piece, and the matching piece is eccentrically arranged relative to the rotation center of the supporting piece and the centers of the supporting surfaces of the plurality of the branch centering pieces, so that the center distance between the two branch centering mechanisms in jacking is changed.
2. The variable center distance positioning device according to claim 1, wherein the number of the centering mechanisms for positioning the workpiece is two, wherein the mating member of one centering mechanism is fixedly connected with the supporting member, and the mating member of the other centering mechanism is rotatably and fixedly connected with the supporting member.
3. The variable center distance positioning device according to claim 2, wherein the number of the centering members of one centering mechanism is two, and the number of the other centering mechanism is three.
4. A connecting rod fine boring jig for positioning and holding a workpiece, comprising the variable center distance positioning device according to any one of claims 1 to 3, a fixing member, a holding member, an anti-drop mechanism, a second driving member, wherein:
the center distance variable positioning device is connected with the fixed piece in a sliding mode, and the second driving piece is used for driving the center distance variable positioning device to slide relative to the fixed piece and enabling the centering mechanism to be axially separated from the circumferential surface, which is jacked by the centering piece, of the workpiece and be jacked by the workpiece;
the clamping piece is fixedly connected with the fixing piece, and the workpiece is pressed against the fixing piece so as to be fixed;
the anti-falling mechanism comprises a guide part, a pressing part and a third driving part, the guide part is fixedly connected with the fixing part, the guide part is provided with a third sliding hole and a matching groove arranged on the peripheral side of the third sliding hole, one end of the pressing part is abutted against the supporting part, the other end of the pressing part is abutted against the workpiece, a matching table is formed on the side surface of the pressing part and slides along the matching groove, the third driving part is connected with the pressing part and is used for driving the pressing part to move along the clamping direction of the clamping part, and at least part of the matching groove is obliquely arranged so that the pressing part and the guide part relatively slide and relatively rotate simultaneously;
and in the process that the second driving piece is axially separated from the workpiece and is jacked by the workpiece and the third driving piece, the press piece slides along the matching groove under the action of the third driving piece, so that the press piece rotates and is jacked on the side surface of the workpiece.
5. The connecting rod fine boring fixture of claim 4, wherein the fixing member comprises a fixing plate and a positioning block, one side of the positioning block is fixedly connected with the fixing plate, the other opposite side of the positioning block is provided with an air check hole, and the workpiece is placed on the air check hole.
6. The connecting rod fine boring fixture as claimed in claim 4, wherein the anti-slip mechanism further comprises an anti-slip rod fixedly connected to the fixing member for preventing the workpiece from dropping to both sides after being pressed against the pressing member.
7. The connecting rod fine boring fixture of claim 4, wherein the clamping member comprises a fourth driving member and a pressing block, one end of the fourth driving member is fixedly connected with the fixing member, and the other end of the fourth driving member is fixedly connected with the pressing block.
8. The connecting rod fine boring jig of claim 7, wherein the fourth driver is a corner hydraulic cylinder.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110009677.1A CN112846296B (en) | 2021-01-05 | 2021-01-05 | Center distance variable positioning device and connecting rod fine boring clamp using same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110009677.1A CN112846296B (en) | 2021-01-05 | 2021-01-05 | Center distance variable positioning device and connecting rod fine boring clamp using same |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112846296A true CN112846296A (en) | 2021-05-28 |
| CN112846296B CN112846296B (en) | 2024-05-14 |
Family
ID=76003871
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110009677.1A Active CN112846296B (en) | 2021-01-05 | 2021-01-05 | Center distance variable positioning device and connecting rod fine boring clamp using same |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112846296B (en) |
Citations (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4040763A (en) * | 1975-10-28 | 1977-08-09 | Gerhard Assenmacher | Method and fixture for reaming piston pin bushings in connecting rods |
| JPH0344538U (en) * | 1989-09-01 | 1991-04-25 | ||
| EP1264659A1 (en) * | 2001-06-05 | 2002-12-11 | A. Römheld GmbH & Co KG | Clamping mechanism with swing clamp |
| CN102398182A (en) * | 2011-12-06 | 2012-04-04 | 天润曲轴股份有限公司 | Flexible clamp for connecting rod |
| CN202207916U (en) * | 2011-08-24 | 2012-05-02 | 亿达日平机床有限公司 | Expanding pin device for positioning crankshaft holes and camshaft holes |
| CN202399059U (en) * | 2011-12-30 | 2012-08-29 | 承德苏垦银河连杆股份有限公司 | Clamp for fine boring of large and small end holes of connecting rod |
| CN203875668U (en) * | 2014-05-26 | 2014-10-15 | 盛瑞传动股份有限公司 | Locating device for machining |
| CN104325327A (en) * | 2014-10-27 | 2015-02-04 | 潍坊盛瑞动力机械科技有限公司 | Hydraulic clamping and positioning device for slope processing of connecting rod |
| CN106141753A (en) * | 2016-08-31 | 2016-11-23 | 襄阳长源东谷实业股份有限公司 | A kind of engine link clamp for machining |
| CN106271771A (en) * | 2016-08-30 | 2017-01-04 | 杭州九龙机械制造有限公司 | A kind of hydraulically operated fixture |
| CN206084506U (en) * | 2016-08-29 | 2017-04-12 | 扬州扬子江宝云缸套有限公司 | Locating hole anchor clamps |
| CN206241299U (en) * | 2016-11-23 | 2017-06-13 | 山东滨州渤海活塞股份有限公司 | Connecting rod boring machine for boring special-shaped holes |
| CN211728415U (en) * | 2019-10-12 | 2020-10-23 | 河北力准机械制造有限公司 | Device for changing multiple varieties of special connecting rod machine |
-
2021
- 2021-01-05 CN CN202110009677.1A patent/CN112846296B/en active Active
Patent Citations (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4040763A (en) * | 1975-10-28 | 1977-08-09 | Gerhard Assenmacher | Method and fixture for reaming piston pin bushings in connecting rods |
| JPH0344538U (en) * | 1989-09-01 | 1991-04-25 | ||
| EP1264659A1 (en) * | 2001-06-05 | 2002-12-11 | A. Römheld GmbH & Co KG | Clamping mechanism with swing clamp |
| CN202207916U (en) * | 2011-08-24 | 2012-05-02 | 亿达日平机床有限公司 | Expanding pin device for positioning crankshaft holes and camshaft holes |
| CN102398182A (en) * | 2011-12-06 | 2012-04-04 | 天润曲轴股份有限公司 | Flexible clamp for connecting rod |
| CN202399059U (en) * | 2011-12-30 | 2012-08-29 | 承德苏垦银河连杆股份有限公司 | Clamp for fine boring of large and small end holes of connecting rod |
| CN203875668U (en) * | 2014-05-26 | 2014-10-15 | 盛瑞传动股份有限公司 | Locating device for machining |
| CN104325327A (en) * | 2014-10-27 | 2015-02-04 | 潍坊盛瑞动力机械科技有限公司 | Hydraulic clamping and positioning device for slope processing of connecting rod |
| CN206084506U (en) * | 2016-08-29 | 2017-04-12 | 扬州扬子江宝云缸套有限公司 | Locating hole anchor clamps |
| CN106271771A (en) * | 2016-08-30 | 2017-01-04 | 杭州九龙机械制造有限公司 | A kind of hydraulically operated fixture |
| CN106141753A (en) * | 2016-08-31 | 2016-11-23 | 襄阳长源东谷实业股份有限公司 | A kind of engine link clamp for machining |
| CN206241299U (en) * | 2016-11-23 | 2017-06-13 | 山东滨州渤海活塞股份有限公司 | Connecting rod boring machine for boring special-shaped holes |
| CN211728415U (en) * | 2019-10-12 | 2020-10-23 | 河北力准机械制造有限公司 | Device for changing multiple varieties of special connecting rod machine |
Non-Patent Citations (1)
| Title |
|---|
| 张小娟;王军;林亮;: "265H型柴油机连杆精镗孔夹具的设计与应用", 铁道机车车辆, no. 1 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN112846296B (en) | 2024-05-14 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101344450B (en) | Method and device for centering and clamping a workpiece in a balancing machine | |
| CN103495753B (en) | Novel thin film chuck | |
| CN112775831B (en) | Floating clamp for honing big end hole of connecting rod | |
| EP1974842A1 (en) | Floating chuck mechanism | |
| CN212665499U (en) | Special fixture for swing ring of powder metallurgy variable pump | |
| CN111408985A (en) | Automatic clamp device for clamping shaft sleeve type parts on cylindrical grinding machine | |
| CN112222431A (en) | Special fixture for milling key groove planes at two ends of crankshaft | |
| CN108942328B (en) | A/C shaft workbench of five-shaft numerical control machine tool | |
| CN112846296A (en) | Variable center distance positioning device and connecting rod fine boring clamp using same | |
| JP2000117572A (en) | Pallet clamp device for machine tool | |
| CN218312838U (en) | Cylindrical grinder auxiliary positioning device | |
| CN211668469U (en) | Device for measuring inner spherical diameter of differential casing | |
| CN216326665U (en) | Special fixture for machining hub bearing hole | |
| CN114777598B (en) | Gauge and detection method for detecting positions of pin holes at two ends of crankshaft with different phases | |
| CN116079446A (en) | Combined clamping tool and method for automatic machining of automobile parts | |
| CN212240310U (en) | Special clamp for clamping shaft sleeve type parts on cylindrical grinding machine | |
| CN214161416U (en) | Special fixture for milling key groove planes at two ends of crankshaft | |
| CN101342675B (en) | Special jig for grinding edge cam | |
| US20050079024A1 (en) | Chuck device, processing apparatus using the same, and pivot shaft | |
| JPH11188587A (en) | Crankshaft grinding device | |
| JPH07237051A (en) | Shaft centering device | |
| CN111515774A (en) | Special clamp for cylindrical grinding machine | |
| CN217966002U (en) | Hydraulic clamp for machining steering knuckle | |
| CN212240311U (en) | Automatic clamp device of cylindrical grinder | |
| CN218800499U (en) | Eccentric excircle machining clamp |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |