CN107813156B - Workpiece clamping machining process - Google Patents

Workpiece clamping machining process Download PDF

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Publication number
CN107813156B
CN107813156B CN201711116803.3A CN201711116803A CN107813156B CN 107813156 B CN107813156 B CN 107813156B CN 201711116803 A CN201711116803 A CN 201711116803A CN 107813156 B CN107813156 B CN 107813156B
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CN
China
Prior art keywords
workpiece
positioning
base
pressing
milling
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Active
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CN201711116803.3A
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Chinese (zh)
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CN107813156A (en
Inventor
胡占楼
陈小勇
唐应邵
赵土成
乔晓辉
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Henan Senyuan Electric Co Ltd
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Henan Senyuan Electric Co Ltd
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Priority to CN201711116803.3A priority Critical patent/CN107813156B/en
Publication of CN107813156A publication Critical patent/CN107813156A/en
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Publication of CN107813156B publication Critical patent/CN107813156B/en
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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23QDETAILS, 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
    • B23Q3/00Devices holding, supporting, or positioning work or tools, of a kind normally removable from the machine
    • B23Q3/02Devices 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
    • B23Q3/06Work-clamping means
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23QDETAILS, 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
    • B23Q1/00Members which are comprised in the general build-up of a form of machine, particularly relatively large fixed members
    • B23Q1/25Movable or adjustable work or tool supports
    • B23Q1/44Movable or adjustable work or tool supports using particular mechanisms
    • B23Q1/50Movable or adjustable work or tool supports using particular mechanisms with rotating pairs only, the rotating pairs being the first two elements of the mechanism
    • B23Q1/52Movable or adjustable work or tool supports using particular mechanisms with rotating pairs only, the rotating pairs being the first two elements of the mechanism a single rotating pair
    • B23Q1/525Movable or adjustable work or tool supports using particular mechanisms with rotating pairs only, the rotating pairs being the first two elements of the mechanism a single rotating pair which is parallel to the working surface

Abstract

The invention provides a workpiece clamping and processing technology, which aims to pre-position a workpiece on the premise of not influencing the normal processing of the workpiece. The workpiece clamping and processing technology comprises the following steps: 1) positioning a workpiece on the overturning base by leaning against the pre-positioning piece; 2) the pressing mechanism presses the workpiece on the overturning base; 3) and moving the pre-positioning piece away from the side of the workpiece so as to enable the machining tool to machine the corresponding surface of the workpiece. According to the part clamping process, the steps of pre-positioning the workpiece and moving the pre-positioning part away after pressing are added, so that the workpiece can be pre-positioned, and the workpiece is prevented from moving.

Description

Workpiece clamping machining process
Technical Field
The invention relates to a workpiece clamping and processing technology.
Background
In the prior art, a plurality of surfaces of a workpiece need to be milled or drilled sometimes, and at the moment, the corresponding surfaces of the workpiece need to be arranged upwards to facilitate machining, so that the workpiece needs to be turned over for many times to complete machining of the workpiece.
The utility model discloses a grant bulletin number is CN 206493139U's a utility model discloses a upset frock clamp, this anchor clamps include that base and level rotate the upset base of assembly on the base, be provided with the hold-down mechanism that compresses tightly the work piece on the upset base, this hold-down mechanism includes a plurality of clamping parts, the clamping part is including fixing the pneumatic cylinder on the upset base, the ejector pin top of pneumatic cylinder is fixed with the pressure head, the pneumatic cylinder can drive the pressure head up-and-down motion and rotate around the ejector pin axis, compress tightly the work piece on the upset base through up-and-down motion and rotation.
However, in the above-mentioned turnover fixture, when the workpiece is initially clamped, that is, the workpiece is placed on the turnover base but the pressing mechanism is not pressed, the workpiece is in an un-positioned state, and at this time, the workpiece is likely to move, so that the pressing mechanism does not position and press the workpiece at a set position. Meanwhile, as a plurality of surfaces of the workpiece need to be processed, the workpiece cannot be compressed, and an external cutter cannot be influenced to process the corresponding surfaces.
Disclosure of Invention
The invention aims to provide a workpiece clamping and processing technology, which aims to pre-position a workpiece on the premise of not influencing the normal processing of the workpiece.
In order to achieve the purpose, the technical scheme of the workpiece clamping and processing technology is as follows: a workpiece clamping and processing technology comprises the following steps: 1) positioning a workpiece on the overturning base by leaning against the pre-positioning piece; 2) the pressing mechanism presses the workpiece on the overturning base; 3) and moving the pre-positioning piece away from the side of the workpiece so as to enable the machining tool to machine the corresponding surface of the workpiece.
The invention has the beneficial effects that: set up the prepositioning piece on the upset base, the prepositioning piece can be assembled on the upset base before the work piece is placed on the upset base, and when placing the work piece, the work piece leans on the prepositioning piece to be fixed a position and place, and hold-down mechanism compresses tightly the work piece on the upset base afterwards, and hold-down mechanism compresses tightly the work piece after, puts aside the prepositioning piece, avoids producing the interference to machining tool, and machining tool processes the corresponding face of work piece afterwards. According to the part clamping process, the steps of pre-positioning the workpiece and moving the pre-positioning part away after pressing are added, so that the workpiece can be pre-positioned, and the workpiece is prevented from moving.
Furthermore, a through hole is formed in the position, where the workpiece is placed, of the turnover base, so that a machining tool can machine the back face of the workpiece.
Further, an end face of the workpiece and the positioning stopper of the pre-positioning piece is defined as a front end face, and the machining steps are as follows: 1) positioning and pressing a workpiece on the overturning base with the right side upward, and milling, drilling and chamfering an orifice on the right side; 2) rotating the turnover base to enable the front end face of the workpiece to be arranged upwards, and milling the front end face of the workpiece; 3) continuing to rotate the turnover base to enable the rear end face of the workpiece to be arranged upwards, and milling the rear end face of the workpiece; 4) and continuously rotating the turnover base to enable the back of the workpiece to be arranged upwards, and chamfering the hole position of the back of the workpiece.
Furthermore, the pre-positioning piece is an end face positioning column which is telescopically assembled on the overturning base.
Further, the pressing mechanism comprises a pressing piece for pressing the workpiece and a pressing driving mechanism for driving the pressing piece to move.
Furthermore, the pressing piece comprises pressing blocks on two sides, the pressing blocks on the two sides move relatively in the left-right direction so as to position and clamp the workpiece, and the pre-positioning piece is arranged on one side, in the front-back direction, of the pressing blocks on the two sides.
Furthermore, the pressing part further comprises a movable pressing plate which is driven by the pressing driving mechanism to stretch and retract along the vertical direction so as to press the workpiece, and a yielding channel for a machining tool to penetrate through to machine the workpiece below the movable pressing plate is arranged on the movable pressing plate.
Furthermore, the pre-positioning part is an end face positioning column which is telescopically assembled on the turnover base, and a positioning column driving mechanism for driving the end face positioning column to stretch is further arranged on the turnover base.
Furthermore, the pressing mechanism driving mechanism and the positioning column driving mechanism respectively comprise hydraulic cylinders for driving the corresponding parts to move.
Furthermore, a main hydraulic circuit is arranged on the turnover base, a plurality of branch hydraulic circuits communicated with the main hydraulic circuit and each hydraulic cylinder are further arranged, electromagnetic valves used for controlling the on-off of the corresponding branch hydraulic circuits are arranged on each branch hydraulic circuit, and the pressing piece is driven to decompress the workpiece and drive the end face positioning column to extend out after machining, and the end face positioning column is driven to retract after the pressing piece compresses the workpiece by controlling the sequence of opening and closing of each electromagnetic valve.
Drawings
FIG. 1 is a schematic view of an overturning positioning fixture used in an embodiment of a workpiece clamping process of the present invention;
FIG. 2 is a schematic view of the assembly of the end positioning post and the third hydraulic cylinder of FIG. 1;
FIG. 3 is an assembly schematic view of the movable hold down block, guide block and first hydraulic cylinder of FIG. 1;
FIG. 4 is a partial cross-sectional view of a flip-flop positioning fixture as provided by the present invention;
FIG. 5 is a schematic view of the inverted positioning fixture of the present invention during oil intake;
FIG. 6 is a schematic view of the inverted positioning fixture for draining oil provided by the present invention;
FIG. 7 is a schematic view of a workpiece;
FIG. 8 is a schematic illustration of a workpiece removal prediction;
FIG. 9 is a schematic view of a first step of the workpiece clamping process according to the present invention;
FIG. 10 is a schematic illustration of drilling, milling and chamfering at the front face in a first step;
FIG. 11 is a schematic diagram of a second step of the workpiece clamping process provided by the present invention;
FIG. 12 is a schematic view of the milled front end face at a second step;
FIG. 13 is a schematic view of a third step of the workpiece clamping process according to the present invention;
FIG. 14 is a schematic view of the milled back end face at a third step;
FIG. 15 is a schematic view of a fourth step of the workpiece clamping process according to the present invention;
FIG. 16 is a schematic view of chamfering the back surface in the fourth step.
Detailed Description
The following further describes embodiments of the present invention with reference to the drawings.
As shown in fig. 1 to 16, in the embodiment of the workpiece clamping process, the machining of the workpiece 11 is taken as an example for explanation, and drilling, chamfering and milling are required to be performed on the front surface of the workpiece 11, milling is required to be performed on the front end surface and the rear end surface of the workpiece, and then chamfering is performed on the drilled hole from the back surface of the workpiece.
The workpiece is clamped by adopting the overturning positioning fixture, the overturning positioning fixture comprises a base 1 and a rotating shaft mounting seat 2 assembled on the base 1, an overturning worktable 15 is rotatably assembled on the rotating shaft mounting seat 2, and the rotating axis of the overturning worktable 15 is a horizontal axis. The overturning positioning fixture further comprises a control mechanism 3 for controlling the overturning worktable 15 to overturn. A fixed pressing block 6 is fixed on one side of the turnover worktable 15, L-shaped positioning tables are arranged on the left side and the right side of the fixed pressing block 6, movable pressing blocks 4 are arranged at the left end and the right end of the fixed pressing block 6, the movable pressing blocks 4 can move in the left-right direction and press a workpiece 11 together with the fixed pressing block 6, a supporting block (not marked in the figure) below the workpiece 11 is further fixed on the turnover worktable 15, and the supporting block and the L-shaped positioning tables are located on the same plane. The front side and the rear side of the movable pressing block 4 are provided with guide blocks 5, the guide blocks 5 can be in sliding contact fit with the movable pressing block 4 in the left-right direction, the movement of the movable pressing block 4 is guided, and the workpiece 11 is positioned and pressed. In this embodiment, the movable pressing block 4 is fixedly mounted on the output end of the first hydraulic cylinder 13, and can reciprocate along with the extension and retraction of the first hydraulic cylinder 13.
The fixed pressing block 6 is further provided with a movable pressing plate 8, the movable pressing plate 8 can move in the up-down direction, the movable pressing plate 8 is provided with a part which can extend above the workpiece 11, and the workpiece 11 can be pressed on the overturning worktable 15 in the downward moving process of the movable pressing plate 8. In this embodiment, the lower end of the movable platen 8 is a pressing portion. The movable platen 8 is fixedly mounted on the output end of the second hydraulic cylinder 14, and can reciprocate up and down with the extension and retraction of the second hydraulic cylinder 14. The movable pressing plate 8 is provided with a yielding groove 9, and the yielding groove 9 forms a yielding channel for processing on the front surface of the workpiece 11 after a processing tool such as a drill bit passes through the yielding channel.
The fixed pressing block 6, the movable pressing block 4 and the movable pressing plate 8 are pressing pieces, and the pressing pieces jointly form a pressing mechanism for positioning the workpiece 11. The pressing mechanism can position and press the workpiece 11 on the turnover worktable 15, but in the pressing process of the pressing mechanism, the front and back direction of the workpiece 11 is not subjected to the positioning action of other positioning structures, so that the workpiece 11 is easy to move along the front and back direction. Based on this problem, an end face positioning column 10 that can be extended and contracted up and down is provided on the turnover table 15, and the lower end of the end face positioning column 10 is fixedly installed on the output end of the third hydraulic cylinder 12 and can reciprocate up and down along with the extension and retraction of the third hydraulic cylinder 12. The end face positioning column 10 can be in stop fit with the front end face of the workpiece 11 in the front-rear direction, and pre-positions the workpiece 11.
The roll-over positioning fixture further comprises a hydraulic power unit 16 and a numerical control unit 17, wherein the hydraulic power unit 16 is connected to each hydraulic cylinder through a main hydraulic circuit 18.
The main hydraulic circuit 18 is provided with a plurality of branch hydraulic circuits which are communicated with the main hydraulic circuit 18 and each hydraulic cylinder, each branch hydraulic circuit is provided with an electromagnetic valve, and the opening and closing of the electromagnetic valves can control the corresponding branch hydraulic circuit to be switched on and off, so that the clamping process is realized (namely, the positioning columns 10 on the front end surface of the workpiece pressed by the pressing mechanism extend out to be used for leaning and pre-positioning the workpiece, and the positioning columns 10 on the rear end surface of the workpiece pressed by the pressing mechanism retract). Meanwhile, when the pressing mechanism is opened after machining is finished, the pressing mechanism is firstly opened, and the subsequent end face positioning column 10 extends out. In this embodiment, the turning positioning fixture further includes a control system for controlling the opening and closing sequence of each electromagnetic valve. The embodiment also comprises a control system, and the control system can control the opening and closing of the electromagnetic valves according to a set sequence.
In this embodiment, the through hole is formed in the flip base, so that the drill and other processing tools can process the workpiece after passing through the through hole, the workpiece can be completely positioned and fixed on the flip base plate, and the workpiece is prevented from being suspended on the flip base plate due to the need of drilling.
The processing process of the workpiece in the invention is as follows: the blank of the workpiece 11 in this embodiment is a T-shaped profile 19 from which a large portion of the preform 20 is removed in advance on a stamping device. Subsequent machining of the workpiece after the blank 20 has been removed includes drilling, milling and chamfering the front face 21, chamfering the drilled hole on the back face 24, milling the front face 22 of the workpiece, and milling the back face 23 of the workpiece 11.
During initial machining, the end face positioning column is in an extended state, and during machining, the hydraulic power unit 16 supplies oil to each hydraulic cylinder through the main hydraulic circuit 18. During oil supply, firstly, the electromagnetic valve corresponding to the first hydraulic cylinder 13 is conducted to drive the first hydraulic cylinder 13, so that the first hydraulic cylinder 13 drives the movable pressing block 4 and the fixed pressing block 6 to press the workpiece 11 together; and then the electromagnetic valve corresponding to the second hydraulic cylinder 14 is conducted to drive the second hydraulic cylinder 14 to drive the movable pressing plate 8 to be pressed on the workpiece 11. At this time, the workpiece 11 is positioned and pressed against the turn table. At this time, the third hydraulic cylinder 12 is turned on correspondingly, so that the third hydraulic cylinder 12 drives the end face positioning column 10 to retract, and the stop with the workpiece 11 is released. The workpiece 11 is mounted on the turn table in the orientation shown in fig. 9 with the front face of the workpiece 11 facing upward, and drilling, milling, and chamfering are performed on the front face 21 with a drill. Then, the turn table is rotated by 90 ° so that the front end face 22 of the workpiece 11 faces upward, and the front end face 22 is milled by a milling cutter. And then, rotating the turnover worktable clockwise or anticlockwise by 180 degrees, so that the rear end surface 23 of the workpiece 11 is arranged upwards, and milling the rear end surface 23 by using a milling cutter. Then, the workpiece 11 is rotated by 90 degrees so that the back surface 24 of the workpiece faces upward, and the drilled hole is chamfered. And after the machining is finished, placing the overturning worktable at an initial position. And controlling each hydraulic cylinder to lift the movable pressing plate, releasing the pressing of the movable pressing block on the workpiece 11, returning the end face positioning column to the original position, taking out the workpiece, and finishing the whole machining process.
In this embodiment, the first hydraulic cylinder and the second hydraulic cylinder constitute a pressing drive mechanism. In this embodiment, the upset workstation is the upset base promptly, and the position that is used for placing the work piece on the upset base is for placing the position. In this embodiment, the end face positioning column constitutes a pre-positioning member, and the pre-positioning member is located at the side of the placing position. The third hydraulic cylinder constitutes a positioning column driving mechanism. In this embodiment, the flexible assembly of prepositioning spare is on the upset base, in other embodiments, can with the removable assembly of prepositioning spare on the upset base, when the locating piece need not be in advance, will in advance the locating piece by on the upset base tear open can.

Claims (3)

1. A workpiece clamping and processing technology is characterized in that: the blank of the workpiece is a T-shaped section, the pre-material is removed in advance on stamping equipment, the workpiece is subjected to subsequent processing after the pre-material is removed, the subsequent processing comprises drilling, milling and chamfering on the front surface, chamfering processing is carried out on the drilling on the back surface, milling processing is carried out on the front end surface of the workpiece, and milling processing is carried out on the rear end surface of the workpiece; the workpiece clamping and processing technology adopts a turning positioning fixture to clamp a workpiece, the turning positioning fixture comprises a base and a rotating shaft mounting seat assembled on the base, a turning base is rotatably assembled on the rotating shaft mounting seat, a through hole is formed in the position, where the workpiece is placed, of the turning base so that a processing tool can process the back of the workpiece, a fixed pressing block is fixed on one side of the turning base, L-shaped positioning tables are arranged on the left side and the right side of the fixed pressing block, movable pressing blocks are arranged on the left side and the right side of the fixed pressing block and can move in the left-right direction and press the workpiece together with the fixed pressing block, a movable pressing plate is further arranged on the fixed pressing block and can stretch out and draw back in the up-down direction under the driving of a pressing driving mechanism so as to press the workpiece, the movable pressing plate has a part capable of extending above the workpiece and can press the workpiece on the turning base in the downward movement process, the movable pressing plate is provided with a yielding channel for a machining tool to pass through so as to machine a workpiece positioned below the movable pressing plate; the fixed pressing block, the movable pressing block and the movable pressing plate together form a pressing mechanism for positioning the workpiece; the overturning base is provided with a pre-positioning piece in a telescopic manner, the pre-positioning piece is an end face positioning column, and the overturning base is also provided with a positioning column driving mechanism for driving the end face positioning column to stretch and retract; the workpiece clamping and processing technology comprises the following steps: 1) positioning a workpiece against a pre-positioning piece and placing the workpiece on the overturning base, wherein the end surfaces of the workpiece and the pre-positioning piece positioning stop are the front end surfaces; 2) the pressing mechanism presses the workpiece on the overturning base; 3) moving the pre-positioning piece away from the side of the workpiece so that the machining tool can machine the corresponding surface of the workpiece; the machining steps are as follows: 1) positioning and pressing a workpiece on the overturning base with the right side upward, and milling, drilling and chamfering an orifice on the right side; 2) rotating the turnover base to enable the front end face of the workpiece to be arranged upwards, and milling the front end face of the workpiece; 3) continuing to rotate the turnover base to enable the rear end face of the workpiece to be arranged upwards, and milling the rear end face of the workpiece; 4) and continuously rotating the turnover base to enable the back of the workpiece to be arranged upwards, and chamfering the hole position of the back of the workpiece.
2. The workpiece clamping machining process according to claim 1, characterized in that: the pressing mechanism driving mechanism and the positioning column driving mechanism respectively comprise hydraulic cylinders for driving the corresponding parts to move.
3. The workpiece clamping machining process according to claim 2, characterized in that: the turnover base is provided with a main hydraulic circuit and a plurality of branch hydraulic circuits which are communicated with the main hydraulic circuit and each hydraulic cylinder, each branch hydraulic circuit is provided with an electromagnetic valve which is used for controlling the on-off of the corresponding branch hydraulic circuit, and the sequence of opening and closing of the electromagnetic valves is controlled so as to realize that the pressing part is driven to decompress the workpiece after machining and drive the end face positioning column to extend out and the pressing part is driven to retract the end face positioning column after pressing the workpiece.
CN201711116803.3A 2017-11-13 2017-11-13 Workpiece clamping machining process Active CN107813156B (en)

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Application Number Priority Date Filing Date Title
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Application Number Priority Date Filing Date Title
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CN107813156B true CN107813156B (en) 2020-10-13

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Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110116225B (en) * 2019-05-17 2021-01-15 中山市庆丰五金机械有限公司 Method for processing golf head
CN110146023A (en) * 2019-05-31 2019-08-20 广东斯丹诺智能装备有限公司 Aluminum alloy pattern plate length laser detection
CN110216481A (en) * 2019-07-03 2019-09-10 中山市大地金属有限公司 The method of its processing valve body of digital control vertical lathe and application
CN110253295B (en) * 2019-07-03 2020-11-17 乐清市曙晟科技有限公司 Machining tool device for automobile rocker arm

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GB1104109A (en) * 1964-12-02 1968-02-21 Klein Louis Hold-down clamp assembly
GB1227733A (en) * 1967-04-14 1971-04-07
US4187600A (en) * 1978-09-26 1980-02-12 Trailer Train Company Apparatus for machining railroad truck bolsters
CN102501105A (en) * 2011-11-01 2012-06-20 上海幸福摩托车有限公司 Clamp for oil pump processing and oil pump processing method
CN202930335U (en) * 2012-11-29 2013-05-08 施耐德电气(中国)有限公司 Auxiliary assembling system
CN203266196U (en) * 2013-05-03 2013-11-06 重庆九源机械有限公司 Tool for machining brake rear cover
CN104646991A (en) * 2015-02-06 2015-05-27 上海索广映像有限公司 Metal plate adhesion jig and metal plate adhesion method
CN105922031A (en) * 2016-06-22 2016-09-07 芜湖百益人防工程防护设备有限公司 Drilling tool plate
CN206493139U (en) * 2016-08-31 2017-09-15 合肥南方汽车零部件有限公司 A kind of hydraulic pressure upset frock clamp processed for lower thrust rod support

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CN101143450A (en) * 2006-09-15 2008-03-19 绿之嘉木业有限公司 Automatic single-plate four-side cutting machine

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1104109A (en) * 1964-12-02 1968-02-21 Klein Louis Hold-down clamp assembly
GB1227733A (en) * 1967-04-14 1971-04-07
US4187600A (en) * 1978-09-26 1980-02-12 Trailer Train Company Apparatus for machining railroad truck bolsters
CN102501105A (en) * 2011-11-01 2012-06-20 上海幸福摩托车有限公司 Clamp for oil pump processing and oil pump processing method
CN202930335U (en) * 2012-11-29 2013-05-08 施耐德电气(中国)有限公司 Auxiliary assembling system
CN203266196U (en) * 2013-05-03 2013-11-06 重庆九源机械有限公司 Tool for machining brake rear cover
CN104646991A (en) * 2015-02-06 2015-05-27 上海索广映像有限公司 Metal plate adhesion jig and metal plate adhesion method
CN105922031A (en) * 2016-06-22 2016-09-07 芜湖百益人防工程防护设备有限公司 Drilling tool plate
CN206493139U (en) * 2016-08-31 2017-09-15 合肥南方汽车零部件有限公司 A kind of hydraulic pressure upset frock clamp processed for lower thrust rod support

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