CN210188596U - Clamping tool for drilling center hole on curved surface forging - Google Patents
Clamping tool for drilling center hole on curved surface forging Download PDFInfo
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- CN210188596U CN210188596U CN201921142667.XU CN201921142667U CN210188596U CN 210188596 U CN210188596 U CN 210188596U CN 201921142667 U CN201921142667 U CN 201921142667U CN 210188596 U CN210188596 U CN 210188596U
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Abstract
The utility model belongs to the technical field of machining auxiliary assembly, specific saying relates to a centre gripping frock that is used for curved surface forging to bore and gets the centre bore. The main technical scheme is as follows: including the frame, set up the centre gripping template in the frame, wherein, the centre gripping template is including lower bolster and the cope match-plate pattern that is used for fixing a position the curved surface forging, the lower bolster sets up in the base of frame, the cope match-plate pattern is through pressing lever and lower bolster centre gripping curved surface forging, cope match-plate pattern one side or relative both sides set up the benchmark hole that detects with numerically controlled fraise machine's tool setting stick cooperation. The clamping tool for drilling the center hole of the curved surface forging has the characteristics of no limitation of the shape of the curved surface forging, high position precision of the center hole and small tolerance of the center hole distance.
Description
Technical Field
The utility model belongs to the technical field of machining auxiliary assembly, specific saying relates to a centre gripping frock that is used for curved surface forging to bore and gets the centre bore.
Background
With the gradual maturity of the forging process, the forging workpiece is more and more complex, precision core components of equipment such as steam turbines, gas turbines, aircraft engines, blowers and the like are all forged and processed, for example, blades have complex twisted outlines, the manufacturing process is complex, the performance requirement is high, the precision core components are generally produced and manufactured by a five-axis numerical control machining center, central holes need to be drilled in two end faces of a blank before processing, the hole pitch precision requirement of the central holes is high, and the requirement reaches +/-0.03 mm. The traditional blade drilling method is to drill holes by utilizing a drill rod of a radial drilling machine to penetrate through a tool with a positioning hole which is the same as the position of a central hole of a workpiece, and the method has the defects of large accumulated error due to equipment error, operation error, processing error, assembly error and the like of the tool, so that the requirement is difficult to meet. Therefore, the novel drilling tool for the blade center hole is designed to be matched with numerical control machining equipment for use, the requirement of high-precision drilling of the center hole at any position of the curved surface forging is met, the distance between the center holes is ensured to be within the tolerance requirement range, and the technical problem to be solved by technical personnel in the field is solved.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing an intelligent centre gripping frock of getting curved surface forging centre bore that uses with the cooperation of numerically controlled fraise machine has and does not receive the restriction of curved surface forging appearance, centre bore position precision height, the characteristics that centre bore apart from the tolerance is little.
In order to achieve the above object, the utility model adopts the following technical scheme:
the utility model provides a centre gripping frock for curved surface forging bores centre bore, includes the frame, sets up the centre gripping template in the frame, wherein, the centre gripping template is including lower bolster and the cope match-plate pattern that is used for fixing a position the curved surface forging, the lower bolster sets up in the base of frame, the cope match-plate pattern is through pressing lever and lower bolster centre gripping curved surface forging, cope match-plate pattern one side or relative both sides set up the benchmark hole that detects with numerically controlled fraise machine's tool setting stick cooperation.
The additional technical characteristics of the clamping tool for drilling the center hole on the curved surface forging piece are as follows:
the pressing lever is in an L shape with a downward opening, a fulcrum of the pressing lever is arranged on a supporting column at the side of the rack, an end of a movable pressing rod of the pressing lever is used for pressing the upper surface of the upper template, and the other end of the movable pressing rod is a pressing wrench;
a limiting table is arranged on the outer side of the supporting column, the limiting table is provided with a limiting through hole, the pressing wrench swings upwards to enable the upper template and the lower template to clamp the curved surface forge piece, a wedge block is inserted into the limiting through hole to prevent the pressing wrench from swinging downwards, and the upper template is enabled to position after pressing the curved surface forge piece;
the number of the support columns and the pressing levers is 2, and the support columns and the pressing levers are respectively arranged on two sides of the rack;
a transverse rotating shaft is arranged between the supporting columns on the two sides of the rack, and a fulcrum of the pressing lever is sleeved on the transverse rotating shaft;
the upper template is driven by a traction mechanism to move relative to the lower template, the traction mechanism comprises an upright column arranged in the frame base, the position of the upright column corresponds to that of the pressing lever, a cross beam is arranged at the end part of the upright column, a fixed pulley is arranged at the end part of the cross beam, a rotatable stranded wire disc is sleeved outside a transverse rotating shaft between the supporting columns, a steel wire rope is wound in the stranded wire disc, after the steel wire rope is tensioned, one end of the steel wire rope bypasses the fixed pulley to be connected with the upper template, and the other end of the steel wire rope is fixed in the stranded wire disc;
a traction handle is fixed at the end part of the transverse rotating shaft, the traction handle is rotated to rotate a wire twisting disc positioned in the transverse rotating shaft, a steel wire rope in the wire twisting disc contracts to drive an upper template to move, a locking rod composed of a bolt is arranged at the end part of the traction handle, a sliding groove is arranged at the lower part of the supporting column, the locking rod is inserted into a ring buckle arranged in the sliding groove, and the upper template and the lower template are positioned after being separated;
the base is provided with 1 or more guide posts which penetrate through guide holes in the upper template;
a plurality of pressing dies are fixed on the lower surface of the upper template at intervals, the surface of each pressing die is consistent with the contour of the upper surface of the curved surface forging, and a lower die cavity consistent with the contour of the lower surface of the curved surface forging is formed in the upper surface of the lower template;
and convex clamping blocks are arranged on the contact surfaces of the pressing die and the lower die groove and the curved surface forging respectively, and the positions of the pressing die clamping blocks vertically correspond to the positions of the lower die groove clamping blocks.
The utility model provides a centre gripping frock for curved surface forging bores and gets centre bore compares with prior art, has following advantage: the novel clamping tool comprises a clamping template, a pressing lever and a pressing plate, wherein the clamping template comprises a lower template and an upper template which are used for positioning a curved surface forging, the lower template is arranged in a base of a frame, and the upper template clamps the curved surface forging through the pressing lever and the lower template; secondly, a datum hole matched with a tool setting rod of the numerical control milling machine for detection is formed in one side or two opposite sides of the upper template, namely, accurate reference positioning is provided for positioning the center hole of the curved surface forging through the datum hole, drilling of the center hole at any part of the curved surface forging is met, and the position accuracy of the center hole is high; thirdly, aiming at curved surface forgings with different thicknesses, an upper die plate of the clamping tool generates vertical deviation, and error correction is carried out on a cutter setting rod through a numerical control milling machine, so that the position precision of a central hole is further maintained, and the tolerance range of the central hole distance is reduced; fourthly, because the lower surface of the upper template is fixed with a plurality of pressing dies distributed at intervals, the surface of each pressing die is consistent with the contour of the upper surface of the curved surface forge piece, the upper surface of the lower template is provided with a lower die cavity consistent with the contour of the lower surface of the curved surface forge piece, on the basis of realizing clamping and drilling, the tool integrates the function of cold correction of the curved surface forge piece, the position deviation generated by the cold correction can be reflected on the change of the datum hole of the upper template in real time, the tool setting rod of the numerical control milling machine can feed back the position coordinate of the central hole to the intelligent monitoring center in time, the position coordinate of the central hole can be quickly adjusted, and the position.
Drawings
Fig. 1 is a schematic structural view of a clamping tool for drilling a center hole in a curved surface forging of the present invention;
fig. 2 is a schematic perspective view of the novel clamping tool;
fig. 3 is a partial enlarged view of the clamping template of the novel clamping tool.
Detailed Description
The structure and the working principle of the clamping tool for drilling the center hole on the curved surface forging provided by the invention are further described in detail with reference to the accompanying drawings.
Referring to fig. 1 and 2, the present invention provides a curved surface forging drilling center hole
The structure of the clamping tool is shown schematically. The structure that constitutes this novel centre gripping frock includes frame 1, sets up centre gripping template 2 in frame 1, and wherein, centre gripping template 2 is including lower bolster 22 and cope match-plate pattern 21 that are used for location curved surface forging A, and lower bolster 22 sets up in the base 11 of frame 1, and cope match-plate pattern 21 is through pressing lever 32 and lower bolster 22 centre gripping curved surface forging A, and cope match-plate pattern 21 one side or relative both sides set up with numerically controlled fraise machine's tool setting stick cooperation detection's benchmark hole 4.
The working principle is as follows: a curved surface forging A to be processed is placed in a lower template 22, the upper template 21 moves downwards to clamp the curved surface forging A with the lower template 22, after the curved surface forging A is pressed and fixed by a pressing lever 32, a tool setting rod on a numerical control milling machine automatically detects coordinates of a reference hole 4 located on the side portion of the upper template 21, a computer controller (a single chip microcomputer and a PLC) in the numerical control milling machine calculates the actual coordinate position of a center hole, and drilling equipment is controlled to drill the center hole. The method comprises the following specific steps:
firstly, according to the shape of a curved surface forging A, determining theoretical coordinates (x 0, y0 and z 0) of a reference hole 4 of an upper template 21 and relative position coordinates (x 1, y1, z 1), (x 2, y2, z 2), (x 3, y3 and z 3) … … (xn, yn and zn) of the theoretical coordinates of each central hole of the curved surface forging A and the reference hole 4 in a computer controller of a numerical control milling machine in advance, determining the value of n according to the number of the central holes, wherein the clamping part of the upper template 21 of a clamping tool only moves in the vertical direction (y coordinate axis), the transverse direction and the longitudinal direction are limited by a clamping die, errors influencing allowance cannot be generated, so that only small changes of the coordinates in the horizontal direction and the vertical direction (x coordinate axis and z coordinate axis) can be ignored, the thickness of a forging product only changes to the y coordinate, and the y direction (vertical direction) is the forging direction of the forging;
step two, after clamping the curved surface forging A to be processed, detecting the reference hole 4 by a knife optical rod installed on a numerical control milling machine, recording the actual coordinates (x 0 ', y0 ', z0 ') of the reference hole 4, and calculating the deviation between the theoretical position and the actual position of the reference hole 4 by a computer controller:
Δx=x0’-x0 Δy=y0’-y0 Δz=z0’-z0
wherein the transverse and longitudinal directions (x, z coordinate axes) are limited by the clamping die, no error with influence on allowance is generated, and the coordinate changes only slightly and negligibly, namely, the coordinate changes Δ x =0 and Δ z =0
Step three, obtaining the actual drilling position coordinate of the curved surface forging A according to the coordinate difference value of the reference hole 4:
（x1’，y1’，z1’）：x1’=x1+Δx/2=x1
y1’=y1+Δy/2=y1+(y0’-y0)/2 z1’=z1+Δz/2=z1
（x2’，y2’，z2’）：x2’=x2+Δx/2=x2
y2’=y2+Δy/2=y2+(y0’-y0)/2 z2’=z2+Δz/2=z2
（x3’，y3’，z3’）：x3’=x3+Δx/2=x3
y3’=y3+Δy/2=y3+(y0’-y0)/2 z3’=z3+Δz/2=z3
……
（xn’，yn’，zn’）：xn’=xn+Δx/2=x3
yn’=yn+Δy/2=yn+(y0’-y0)/2 zn’=zn+Δz/2=zn
namely, the actual coordinate values of the center hole of the curved surface forging A are respectively as follows: (x 1, y1+ (y0 '-y 0)/2, z 1), (x 2, y2+ (y 0' -y0)/2, z 2), (x 3, y3+ (y0 '-y 0)/2, z 3), … …, (xn, yn + (y 0' -y0)/2, zn)
And fourthly, inputting the actual coordinate value of the central hole obtained by calculation into a numerical control milling machine by the computer controller, and performing drilling operation by the numerical control milling machine according to the input parameters, wherein the change value in the y direction is the change value of the thickness of the forged piece, so that the position precision of the central hole is improved, and the uniformity of the machining allowance is ensured.
In the structure of the clamping tool for drilling the central hole in the curved surface forging A,
in order to press the limiting upper die plate 21 conveniently, the pressing lever 32 is in an L shape with a downward opening, a fulcrum a of the pressing lever 32 is arranged on the supporting column 31 at the side of the rack 1, the end of the movable pressing rod 321 of the pressing lever 32 is used for pressing the upper surface of the upper die plate 21, and the other end of the movable pressing rod is a pressing wrench 322;
preferably, the limiting table 33 is arranged outside the supporting column 31, the limiting table 33 has a limiting through hole 331, the pressing wrench 322 swings upward to enable the upper die plate 21 and the lower die plate 22 to clamp the curved surface forging a, the wedge block 332 is inserted into the limiting through hole 331 to block the pressing wrench 322 from swinging downward, so that the upper die plate 21 is positioned after pressing the curved surface forging a, that is, the limiting table 33 can improve the pressing force of the upper die plate 21, and the central hole position deviation caused by the looseness of the clamping die plate 2 is avoided;
in order to enhance the stability of the tool, the number of the pressing levers 32 and the supporting columns 31 is two, and the pressing levers and the supporting columns are respectively arranged on two sides of the rack 1, so that the clamping templates 2 are safely and stably opened and closed, and the curved surface forging A is clamped between the upper template 21 and the lower template 22 more firmly;
furthermore, a transverse rotating shaft 326 is arranged between the supporting columns 31 positioned at two sides of the rack 1, a fulcrum a of the pressing lever 32 is sleeved on the transverse rotating shaft 326, and the pressing lever 32 can rotate relative to the transverse rotating shaft 326, so that the operation stability of a pressing lever structure consisting of the supporting columns 31 and the pressing lever 32 is enhanced, the two symmetrical pressing levers 32 apply force symmetrically, the pressing force degree of the upper template 21 is more balanced, the curved surface forging A is clamped more firmly, and the accuracy in drilling the central hole is also improved;
preferably, the upper die plate 21 is driven by a traction mechanism to move relative to the lower die plate 22, the traction mechanism includes an upright 51 arranged in the base 11 of the frame 1, the position of the upright 51 corresponds to the position of the pressing lever 32, the end of the upright 51 is provided with a cross beam 52, the end of the cross beam 52 is provided with a fixed pulley 53, a rotatable wire twisting disc 54 is sleeved outside a transverse rotating shaft 326 between the opposite supporting columns 31, the wire twisting disc 54 is fixed on the transverse rotating shaft 326 to rotate synchronously with the transverse rotating shaft 326, a steel wire rope 55 is wound in the wire twisting disc 54, one end of the steel wire rope 55 after being tensioned bypasses the fixed pulley 53 to be connected with the upper die plate 21, and the other end of the steel wire rope is fixed in the wire twisting disc 54, namely, the wire twisting disc 54 rotates to drive the steel wire rope 55 on the fixed pulley 53 to contract, so as;
furthermore, a traction handle 320 is fixed at the end of the transverse rotating shaft 326, the traction handle 320 is rotated to rotate a stranded wire disc 54 located in the transverse rotating shaft 326, a steel wire rope 55 in the stranded wire disc 54 contracts to drive the upper template 21 to move, a locking rod 323 formed by bolts is arranged at the end of the traction handle 320, a sliding groove 324 is arranged at the lower part of the supporting column 31, the locking rod 323 is inserted into a buckle 325 arranged in the sliding groove 324, namely the traction handle 320 is pressed to drive the transverse rotating shaft 326 to rotate, the transverse rotating shaft 326 rotates to drive the stranded wire disc 54 to rotate, the locking rod 323 on the traction handle 320 is inserted into the buckle 325 arranged at the lower part of the supporting column 31 to realize the positioning of the upper template 21, the clamping tool is opened after drilling is completed, the upper template 21 and the lower template 22 are separated and then locked in time, and the;
one or more guide posts 61 are arranged on the base 11, and the guide posts 61 penetrate through guide holes 62 formed in the upper template 21, so that the upper template 21 and the lower template 22 are ensured to be accurately positioned in operation, the mold closing is stable, the occlusion is regular, and the movement deviation cannot occur;
as shown in fig. 3, a plurality of pressing dies 211 are fixed on the lower surface of the upper die plate 21 at intervals, the surface of each pressing die 211 is consistent with the contour of the upper surface of the curved surface forging a, the upper surface of the lower die plate 22 is provided with lower die grooves 221 consistent with the contour of the lower surface of the curved surface forging a, the contact area between the pressing dies 211 distributed at intervals and the curved surface of the forging is reduced, and residual deformation caused during clamping and pressing is avoided, and meanwhile, the tool has a cold correction function, so that the local micro plastic deformation speed of the curved surface of the forging is accelerated, and new deformation caused by attenuation and release of residual stress is avoided;
preferably, convex clamping blocks (23, 23 ') are arranged on the contact surfaces of the pressing die 211 and the lower die groove 221 with the curved surface forging A respectively, and the positions of the pressing die clamping block 23 and the lower die groove clamping block 23' vertically correspond to each other B;
the widths of the grooves (24, 24') and the distance between the adjacent pressing dies 211 are respectively in direct proportion to the curvature radius of the contact surface of the curved surface forging A, and the curved surface forging A subjected to the tool cold correction does not partially recover the original deformation and generate new deformation due to attenuation and release of residual stress in the using and placing processes or in finish machining, so that the tool is particularly suitable for curved surface cold correction of workpieces and precision parts bearing high load.
Claims (10)
1. The utility model provides a centre gripping frock that is used for curved surface forging to bore gets centre bore which characterized in that: including the frame, set up the centre gripping template in the frame, wherein, the centre gripping template is including lower bolster and the cope match-plate pattern that is used for fixing a position the curved surface forging, the lower bolster sets up in the base of frame, the cope match-plate pattern is through pressing lever and lower bolster centre gripping curved surface forging, cope match-plate pattern one side or relative both sides set up the benchmark hole that detects with numerically controlled fraise machine's tool setting stick cooperation.
2. The clamping tool for drilling the central hole in the curved surface forging piece according to claim 1, wherein the clamping tool comprises: the pressing lever is L-shaped with a downward opening, a fulcrum of the pressing lever is arranged on the supporting column of the side portion of the rack, the end portion of a movable pressing rod of the pressing lever is used for pressing the upper surface of the upper template, and the other end portion of the movable pressing rod is a pressing wrench.
3. The clamping tool for drilling the central hole in the curved surface forging piece according to the claim 2, characterized in that: the outside of support column sets up spacing platform, spacing platform has spacing through-hole, it makes to press down the spanner up-swing behind cope match-plate pattern and the tight curved surface forging of lower bolster clamp, insert the wedge in the spacing through-hole and block press down the pendulum that returns of spanner, make the cope match-plate pattern compresses tightly curved surface forging back location.
4. The clamping tool for drilling the central hole in the curved surface forging piece according to the claim 2, characterized in that: the support column and the pressing lever are combined in 2 sets and are respectively arranged on two sides of the rack.
5. The clamping tool for drilling the central hole in the curved surface forging piece according to claim 4, wherein the clamping tool comprises: and a transverse rotating shaft is arranged between the supporting columns at two sides of the rack, and the fulcrum of the pressing lever is sleeved on the transverse rotating shaft.
6. The clamping tool for drilling the central hole in the curved surface forging piece according to claim 4, wherein the clamping tool comprises: the upper die plate is driven by a traction mechanism to move relative to the lower die plate, the traction mechanism comprises a stand column arranged in the base of the rack, the stand column corresponds to the position of the pressing lever, a cross beam is arranged at the end part of the stand column, a fixed pulley is arranged at the end part of the cross beam, a stranded wire disc capable of rotating is sleeved outside a transverse rotating shaft between supporting columns, a steel wire rope is wound in the stranded wire disc, one end of the steel wire rope is wound around the fixed pulley to be connected with the upper die plate after being tensioned, and the other end of the steel wire rope is fixed in the stranded wire.
7. The clamping tool for drilling the central hole in the curved surface forging piece according to claim 6, wherein the clamping tool comprises: the end part of the transverse rotating shaft is fixedly provided with a traction handle, the traction handle is rotated to enable a wire stranding disc positioned in the transverse rotating shaft to rotate, a steel wire rope in the wire stranding disc contracts to drive an upper template to move, the end part of the traction handle is provided with a locking rod formed by a bolt, the lower part of the supporting column is provided with a sliding groove, the locking rod is inserted into a ring buckle arranged in the sliding groove, and the upper template and the lower template are separated and then positioned.
8. The clamping tool for drilling the central hole in the curved surface forging piece according to claim 1, wherein the clamping tool comprises: the base is provided with 1 or more guide posts, and the guide posts penetrate through the guide holes of the upper template.
9. The clamping tool for drilling the central hole in the curved surface forging piece according to claim 1, wherein the clamping tool comprises: the lower surface of the upper template is fixed with a plurality of pressing dies distributed at intervals, the surface of each pressing die is consistent with the contour of the upper surface of the curved surface forge piece, and the upper surface of the lower template is provided with a lower die cavity consistent with the contour of the lower surface of the curved surface forge piece.
10. The clamping tool for drilling the central hole in the curved surface forging piece according to claim 9, wherein the clamping tool comprises: and the contact surfaces of the pressing die and the lower die groove and the curved surface forging piece are respectively provided with a raised clamping block, and the positions of the formed pressing die clamping block and the lower die groove clamping block vertically correspond.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921142667.XU CN210188596U (en) | 2019-07-20 | 2019-07-20 | Clamping tool for drilling center hole on curved surface forging |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921142667.XU CN210188596U (en) | 2019-07-20 | 2019-07-20 | Clamping tool for drilling center hole on curved surface forging |
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| CN210188596U true CN210188596U (en) | 2020-03-27 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110216310A (en) * | 2019-07-20 | 2019-09-10 | 衡水裕菖铸锻有限公司 | A kind of clamping tooling drilling through centre bore for curved surface forging |
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2019
- 2019-07-20 CN CN201921142667.XU patent/CN210188596U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110216310A (en) * | 2019-07-20 | 2019-09-10 | 衡水裕菖铸锻有限公司 | A kind of clamping tooling drilling through centre bore for curved surface forging |
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Address after: 053000 Hengshui city of Hebei Province North Taocheng District industrial base rubber road No. 1 Patentee after: Hengshui Zhongyu Tiexin equipment Engineering Co.,Ltd. Address before: 053000 Hengshui city of Hebei Province North Taocheng District industrial base rubber road No. 1 Patentee before: HENGSHUI YUCHANG CASTING Co.,Ltd. |