CN202129649U - Anti-clamping deformation machining clamp for large-caliber elbow - Google Patents

Anti-clamping deformation machining clamp for large-caliber elbow Download PDF

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Publication number
CN202129649U
CN202129649U CN201120101813U CN201120101813U CN202129649U CN 202129649 U CN202129649 U CN 202129649U CN 201120101813 U CN201120101813 U CN 201120101813U CN 201120101813 U CN201120101813 U CN 201120101813U CN 202129649 U CN202129649 U CN 202129649U
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CN
China
Prior art keywords
clamping
fixture block
elbow
base plate
combination
Prior art date
Application number
CN201120101813U
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Chinese (zh)
Inventor
何广熟
林恒龙
蒯尧山
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扬州华宇管件有限公司
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Priority to CN201120101813U priority Critical patent/CN202129649U/en
Application granted granted Critical
Publication of CN202129649U publication Critical patent/CN202129649U/en

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Abstract

The utility model discloses an anti-clamping deformation machining clamp for a large-caliber elbow, wherein three combination clamping blocks are arranged on a clamping bottom board. Each of the combination clamping blocks comprises an upper clamping block, a lower clamping block, a bottom board and a connecting bolt. The inner sides of the upper clamping block and the lower clamping block are circular arc-shaped notches. When the upper clamping block and the lower clamping block are closed, a circle consistent with the external diameter of an elbow to be machined is formed. The upper clamping block and the lower clamping block are connected together and fastened through the connecting bolt. The bottom board arranged at the bottom of the lower clamping block is equipped with a sliding chute. A locking bolt passing through the sliding chute of the bottom board of the combination clamping block is fastened so as to fixing the combination clamping block to the clamping bottom board. According to the utility model, a large-caliber elbow is clamped through the direct clamping of a tube blank in a surface-contact mode. During the clamping process, no radial compacting force is generated, so that the radial compressing deformation and the torque of the elbow are not easily generated. The machining is performed through a large-caliber thin-walled elbow machine, so that the machining precision of elbows is ensured.

Description

The large caliber bend clamping tool for machine work of anti-clamping deformation
Technical field
The utility model belongs to the frock clamp processing and fabricating and the assembling field of machining, relates to a kind of clamping tool for machine work, especially is particularly related to a kind of large caliber bend clamping tool for machine work of anti-clamping deformation.
Background technology
Port to large caliber bend carries out machining, owing to receive the processing conditions and the high-precision requirement of elbow end face groove of lathe self, needs on milling-boring machine, to carry out.Because the appearance profile of elbow is a circular arc, the clamping location of elbow is difficulty relatively.Particularly for large caliber bend, because elbow appearance and size is bigger, according to traditional machining clamping method, the elbow end face after the machine-shaping is difficult to guarantee smooth, and machining angle is difficult to meet the demands, and does not all reach more satisfactory result.
To large caliber bend machined characteristics; Chinese patent 2010202899372 discloses a kind of large caliber bend clamping tool for machine work; The installation way of employing face contact carries out clamping with three elbow locating pieces that have an arcuate surface that diameter equates with the elbow outer tube diameter and locatees, and wherein two stationary positioned pieces are located the outer arc side of elbows; Another piece scalable locating piece can move in locating slot; From the inner arc lateral confinement system elbow of elbow radially, move axially, reach the purpose of adjustment, fixation workpiece and dismounting workpiece, its installation way is shown in Fig. 1 a and Fig. 1 b.The elbow bigger for the material wall thickness, that requirement on machining accuracy is low adopts illustrated installation way, relies on two stationary positioned piece 21,23 and scalable locating pieces 22, fixes elbow to be processed, and convenient mounting and clamping is quick.But, thinner for wall thickness, the end processing of the elbow that machining accuracy is higher; Its drawback will be obvious, and three locating pieces 21,23,22 grip elbow, need very big clamping thrust during machined; Be easy to produce clamping deformation for the thin-walled elbow; When unclamping scalable locating piece 22 after machined finishes, elbow metal material bullet, plastic deformation will be restored, and machining accuracy can not get guaranteeing.
The problem that the end machined of big specification elbow exists is that when on milling-boring machine, carrying out machined, existing clamping tool makes the thin-walled elbow produce distortion easily, can not guarantee the machined precision; Particularly used in nuclear power station pipe fitting etc. needs high-precision processing, and existing clamping tool can not meet the demands far away.
Summary of the invention
The purpose of the utility model is to provide a kind of large caliber bend clamping tool for machine work of anti-clamping deformation; It is excessive to overcome existing elbow machined clamping tool clamping or thrust; Make elbow easily; Particularly the thin-walled elbow produces the problem of deformation, reaches the deformation that prevents that the elbow clamping is produced in the machining process, thereby guarantees the technique effect of machined precision.
The anchor clamps of the utility model adopt a plurality of combination fixture blocks of symmetric arrangement that elbow is carried out the clamping location; The upper and lower fixture block of combination fixture block forms the cambered surface consistent with bore, the curvature of elbow to be processed; The pipe of direct clamping elbow; Avoid utilizing elbow thrust radially to fix elbow, make elbow produce radially compressing distortion and moment of torsion.
The utility model adopts following technical scheme:
A kind of large caliber bend clamping tool for machine work of anti-clamping deformation; Comprise clamping base plate (1); It is characterized in that: three combination fixture blocks are set on the clamping base plate (1), and described combination fixture block is made up of last fixture block (31,32,33), following fixture block (21,22,23), base plate and connecting bolt (4), and upper and lower fixture block inboard is a circular arc cutaway; Closed back forms and the consistent circle of elbow to be processed (6) external diameter; Upper and lower fixture block is connected fastening by connecting bolt (4), base plate is positioned at the bottom of fixture block (21,22,23) down, has chute on the base plate; Clamping screw (5) passes the chute on the combination fixture block base plate, described combination fixture block is fixed on the clamping base plate (1) after fastening.
Elbow pipe to be processed conclusion of the business angle distributes described combination fixture block in clamping base plate upper edge, and respectively perpendicular to the radius of curvature circle of processing elbow, forms angle between promptly described combination fixture block, and point to the center of curvature of elbow respectively.
Described combination fixture block preferably is symmetrically distributed on the elbow pipe.
Maximum angle between described combination fixture block is preferably identical with angle of bend or be slightly less than angle of bend.
Position according to combination fixture block base plate upper hopper chute on the described clamping base plate is provided with one group of screwed hole, is used for the fastening of clamping screw.Preferred 12 of described screwed hole is divided into 3 groups, and 4 every group are used for the fixing of 1 combination fixture block.
Described combination fixture block is made up of last fixture block, following fixture block, base plate and connecting bolt.The inboard of upper and lower fixture block is the circular arc cutaway that diameter equates with the elbow outer tube diameter, preferred semicircle breach, and upper and lower fixture block is connected closed by connecting bolt, form the circular duct consistent with the external diameter of elbow to be processed in the fastening back combination fixture block.
The base plate that the combination fixture block has, base plate are positioned at the bottom of fixture block down, have chute on the base plate, and the chute width is a bit larger tham the external diameter of clamping screw.A kind of set-up mode of chute such as the specific embodiment description, on described base plate, offer four strip chutes, be symmetrically distributed in down the both sides of fixture block, both sides each 2.
Described combination fixture block can adopt identical shaped Design and Machining.
The utility model carries out elbow clamping location through the mode that the one group of combination fixture block that has arcuate surface contacts with the elbow face; The clamping base plate is connected with the milling-boring machine processing platform; The cambered surface of three combination fixture blocks is consistent with bore, the curvature of elbow to be processed; Angled (three groups of fixture blocks are evenly arranged, become certain angle of cut) on the same base plate, the pipe of the direct clamping elbow of upper and lower fixture block of being installed in.The clamping process of elbow is; Unclamp clamping bolt and connecting bolt on the clamping base plate; Elbow to be processed is placed in the circular arc cutaway of fixture block under the combination fixture block, behind the position of correction combination fixture block, fixing and locking bolt and connecting bolt; Large caliber bend directly pierces between the circumferential notch of combination fixture block, and upper and lower fixture block is through location, the fastening back of connecting bolt elbow.Move in chute through clamping screw scalable combination fixture block, the position of location combination fixture block, the fastening upper and lower fixture block of connecting bolt, thus the restriction elbow radially, move axially, reach the purpose of adjustment, fixation workpiece and dismounting workpiece.
The utility model carries out the clamping location through three groups of combination fixture blocks to elbow, and the combination fixture block moves on the clamping base plate through the chute of bottom, is convenient to make up fixture block like this and makes radiai adjustment along elbow.Behind three groups of combination fixture block adjusting positions, will make up fixture block behind the fastening clamping screw and be fixed on the clamping base plate, and be fastenedly connected bolt more respectively, the upper and lower fixture block of combination fixture block forms and elbow bore, the corresponding to cambered surface of curvature, directly the pipe of clamping elbow.Realized the clamping location of elbow like this, the elbow thrust radially of also avoiding existing anchor clamps in clamping, to produce simultaneously is difficult for the deformation of generation, thereby has guaranteed the machined precision in the elbow machining process.
All available 45# steel of whole parts of each part of the utility model or 20# steel and steel plate carry out machined and obtain, aboundresources, and machined is simple and convenient.
The utility model has overcome the deficiency of prior art, contacts the mode clamping large caliber bend of direct clamping pipe with face, has avoided utilizing elbow thrust radially to reach the fixedly drawback of elbow, is difficult for making elbow to produce radially compressing distortion and moment of torsion.Utilize three combination fixture blocks can play the effect of balance, can farthest control the distortion of elbow clamping process, particularly for large-caliber thin-walled elbow, the clamping effect of these anchor clamps is particularly outstanding.
The utlity model has applicability, apply to large-caliber thin-walled elbow, particularly used in nuclear power station elbow processing can guarantee the machined precision of elbow to have good market prospects.
Below in conjunction with the accompanying drawing and the specific embodiment, the utility model is described in detail, the protection domain of the utility model does not exceed with the specific embodiment, but is limited claim.
Description of drawings
The front view of Fig. 1 a large caliber bend clamping tool for machine work.
The vertical view of Fig. 1 b Fig. 1 a anchor clamps.
The structural representation of the large caliber bend machining fixture of the anti-clamping deformation of Fig. 2 a.
The profile of Fig. 2 b combination fixture block.
Fig. 3 is threaded the vertical view of the clamping base plate in hole.
The front view of Fig. 4 a combination fixture block.
The vertical view of Fig. 4 b combination fixture block.
The side view of Fig. 4 c combination fixture block.
The specific embodiment
The elbow clamping tool for machine work of the anti-clamping deformation of the utility model carries out the clamping of large caliber bend and locatees through the mode of combination fixture block.
Shown in Fig. 2 a and Fig. 2 b; The clamping tool for machine work of the anti-clamping deformation of a kind of 90 ° of large caliber bends; Comprise clamping base plate 1; Three combination fixture blocks that are 45 ° of angles distributions that shape is identical on the clamping base plate 1,6 upper and lower fixture block connecting bolts 4, fixed combination fixture block also play 12 clamping screws 5 of slide-and-guide effect.
As shown in Figure 3, described clamping base plate 1 is connected with the milling-boring machine processing platform, and the relevant position of corresponding combination fixture block is processed with 12 screwed holes on this clamping base plate 1, is used for clamping screw 5 fixed combination fixture blocks.
Referring to Fig. 2 b and Fig. 4 a, Fig. 4 b and Fig. 4 c, the combination fixture block is by last fixture block 31,32,33, fixture block 21,22,23, base plate and connecting bolt 4 are formed down.Upper and lower fixture block inboard is the semicircle breach that diameter equates with the elbow outer tube diameter, and closed back forms and the consistent arc surface of elbow 6 external diameters to be processed, and the two ends of upper and lower fixture block are connected by connecting bolt 4 respectively.Base plate is positioned at the bottom of fixture block 21,22,23 down, has chute on the base plate, and the chute width is a bit larger tham the external diameter of clamping screw 5, is convenient to make up the fixture block motion freely, is convenient to clamping screw 5 locking positionings.On the base plate of each combination fixture block, offer four strip chutes respectively, be symmetrically distributed in down the both sides of fixture block 21,22,23, each 2 of both sides.Base plate can be fixing with following fixture block 21,22,23 welding after processing chute.
According to design, last fixture block 31,32,33 can be rolled by steel plate and form, and processes tapped through hole in corresponding position.(fixture block one side is processed two chutes can to process the chute that makes up the fixture block base plate earlier; Play balanced action when being convenient to the processing cutting); Press from both sides down fast 21,22,23 when making earlier according to the bore processing of the elbow 6 to be processed curved surface circular arc of fixture block 21,22,23 down, make the bore and the curvature maintenance basically identical of itself and elbow, reprocess down the screwed hole of fixture block 21,22,23; To play fixture block 21,22,23 and base plate to weld then, and weld grinding will be repaired.Process tapped blind hole in the corresponding position of combination fixture block.
Elbow 6 pipes to be processed become 45 ° of angles of cut to distribute to 3 combination fixture blocks in clamping base plate 1 upper edge, and round perpendicular to the radius of curvature of processing elbow 6 respectively.Angle between the combination fixture block of both sides is 90 °, and is identical with processing elbow 6 angles.To make up fixture block and be connected through clamping screw 5 with clamping base plate 1, the combination fixture block can be free to slide along chute.
With large caliber bend to be processed 6, be positioned over down on the cambered surface of fixture block 21,22,23, will make up fixture block mobile adjustment on chute, till position suitable; Be covered with fixture block 31,32,33, with the fastening fixing upper and lower fixture blocks of connecting bolt 4, after carry out machined.
The structure that the utility model adopts; When the large-caliber thin-walled elbow of processing; Can produce clamping deformation hardly, make elbow add man-hour, keep the reset condition of elbow; Can not produce moment of torsion or flexural deformation because of the thrust of clamping, elbow clamping advantage big for bore, that the high-precision processing of thin-walled requires is particularly evident.
Said anchor clamps can adopt common 45# steel or 20# steel and steel plate to make, during parts carried out heat treatment to improve the mechanical property of material.The raw material of the utility model are easy to get, and are easy to process.
The large caliber bend clamping tool for machine work of the anti-clamping deformation of the utility model, clamping is rational in infrastructure, and is practical and convenient.Can carry out 60 ° of large caliber bend design of Clamping Apparatus and making that wait other angle equally according to described technical scheme and design.

Claims (8)

1. the large caliber bend clamping tool for machine work of an anti-clamping deformation; Comprise clamping base plate (1); It is characterized in that: three combination fixture blocks are set on the clamping base plate (1), and described combination fixture block is made up of last fixture block (31,32,33), following fixture block (21,22,23), base plate and connecting bolt (4), and upper and lower fixture block inboard is a circular arc cutaway; Closed back forms and the consistent circle of elbow to be processed (6) external diameter; Upper and lower fixture block is connected fastening by connecting bolt (4), base plate is positioned at the bottom of fixture block (21,22,23) down, has chute on the base plate; Clamping screw (5) passes the chute on the combination fixture block base plate, described combination fixture block is fixed on the clamping base plate (1) after fastening.
2. clamping tool for machine work according to claim 1 is characterized in that: described combination fixture block becomes angle to distribute at clamping base plate (1), and round perpendicular to the radius of curvature of elbow to be processed (6) respectively.
3. clamping tool for machine work according to claim 1 is characterized in that: described combination fixture block is symmetrically distributed on elbow to be processed (6) pipe.
4. clamping tool for machine work according to claim 1 is characterized in that: the maximum angle between described combination fixture block is identical with elbow to be processed (6) angle or be slightly less than elbow to be processed (6) angle.
5. clamping tool for machine work according to claim 1 is characterized in that: the position that described clamping base plate (1) is gone up according to the base plate upper hopper chute of combination fixture block is provided with 3 groups, every group 4 screwed holes.
6. clamping tool for machine work according to claim 1 is characterized in that: described circular arc cutaway is semicircle breach.
7. clamping tool for machine work according to claim 1 is characterized in that: described chute width is a bit larger tham the external diameter of clamping screw (5).
8. clamping tool for machine work according to claim 1 is characterized in that: offer four strip chutes on the described base plate, be symmetrically distributed in down the both sides of fixture block (21,22,23), each two of every sides.
CN201120101813U 2011-04-09 2011-04-09 Anti-clamping deformation machining clamp for large-caliber elbow CN202129649U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201120101813U CN202129649U (en) 2011-04-09 2011-04-09 Anti-clamping deformation machining clamp for large-caliber elbow

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201120101813U CN202129649U (en) 2011-04-09 2011-04-09 Anti-clamping deformation machining clamp for large-caliber elbow

Publications (1)

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CN202129649U true CN202129649U (en) 2012-02-01

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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102139457A (en) * 2011-04-09 2011-08-03 扬州华宇管件有限公司 Clamping deformation resistant jig for machining large-diameter elbow
CN103264294A (en) * 2013-05-30 2013-08-28 河北理工大学智能仪器厂 Elbow-pipe sensor clamping device
CN106041147A (en) * 2015-04-10 2016-10-26 斯凯孚公司 Device for clamping workpiece
CN106695112A (en) * 2016-11-15 2017-05-24 首都航天机械公司 Novel trajectory motion key pressing mechanism
US10518335B2 (en) 2016-10-10 2019-12-31 Aktiebolaget Skf Device for holding a workpiece
CN111215650A (en) * 2019-11-19 2020-06-02 郑州飞机装备有限责任公司 Multi-angle pipe joint clamp

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102139457A (en) * 2011-04-09 2011-08-03 扬州华宇管件有限公司 Clamping deformation resistant jig for machining large-diameter elbow
CN103264294A (en) * 2013-05-30 2013-08-28 河北理工大学智能仪器厂 Elbow-pipe sensor clamping device
CN106041147A (en) * 2015-04-10 2016-10-26 斯凯孚公司 Device for clamping workpiece
US10518335B2 (en) 2016-10-10 2019-12-31 Aktiebolaget Skf Device for holding a workpiece
CN106695112A (en) * 2016-11-15 2017-05-24 首都航天机械公司 Novel trajectory motion key pressing mechanism
CN106695112B (en) * 2016-11-15 2019-02-26 首都航天机械公司 A kind of novel track movement key hold-down mechanism
CN111215650A (en) * 2019-11-19 2020-06-02 郑州飞机装备有限责任公司 Multi-angle pipe joint clamp

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Granted publication date: 20120201