CN111151862A - Cold welding tongs device - Google Patents

Cold welding tongs device Download PDF

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Publication number
CN111151862A
CN111151862A CN202010125360.XA CN202010125360A CN111151862A CN 111151862 A CN111151862 A CN 111151862A CN 202010125360 A CN202010125360 A CN 202010125360A CN 111151862 A CN111151862 A CN 111151862A
Authority
CN
China
Prior art keywords
hydraulic oil
cold welding
pipe
hydraulic
knife
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.)
Pending
Application number
CN202010125360.XA
Other languages
Chinese (zh)
Inventor
王少哲
邹建军
黄俊杰
李永明
刘智清
何娜娜
王达
梁桂铭
熊师
陈洋洋
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Kunshan Guoli High Power Device Industrial Technology Research Institute Co ltd
Original Assignee
Kunshan Guoli High Power Device Industrial Technology Research Institute Co ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Kunshan Guoli High Power Device Industrial Technology Research Institute Co ltd filed Critical Kunshan Guoli High Power Device Industrial Technology Research Institute Co ltd
Priority to CN202010125360.XA priority Critical patent/CN111151862A/en
Publication of CN111151862A publication Critical patent/CN111151862A/en
Pending legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K20/00—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating
    • B23K20/001—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating by extrusion or drawing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K2101/00—Articles made by soldering, welding or cutting
    • B23K2101/04—Tubular or hollow articles
    • B23K2101/06—Tubes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K2103/00—Materials to be soldered, welded or cut
    • B23K2103/08—Non-ferrous metals or alloys
    • B23K2103/12—Copper or alloys thereof

Abstract

The invention discloses a cold welding tongs device, which comprises a hydraulic oil cylinder power system with a handle and a tong head separated, wherein an operator can easily obtain a shearing force of 10 tons, and the cold welding operation of a copper pipe is efficient and reliable due to the tong head designed in a radian manner. The device can be used for easily clamping the jaw of a pure copper pipe with the outer diameter of 30 mm or less and the wall thickness of 2 mm or less, the jaw has excellent vacuum sealing performance, and the high efficiency and the high reliability in the operation process completely meet the harsh drying and exhausting production process requirements of high-power and high-efficiency microwave power source devices.

Description

Cold welding tongs device
Technical Field
The invention relates to a cold welding tongs device, in particular to a cold welding tongs device of a high-power high-efficiency microwave power source baking exhaust pipe.
Background
Baking exhaust is the most critical part in the production process of the high-power high-efficiency microwave klystron, an electric vacuum device, and the aim is to increase the temperature to enable residual gas (such as H) on the inner surface of the klystron2O、CO、H2Etc.) to sufficiently precipitate out, thereby achieving ultra-high vacuum (generally 10) in the tube-7～10-8Pa magnitude) to improve the cathode emission performance, the whole tube performance and the service life of the tube. The final step of the baking and exhausting process is to seal off the pipe, and the basic operation is to use cold rolling pliers to break the exhaust pipe (generally an oxygen-free copper pipe) connected between the klystron and the exhaust port of the oil-free ultrahigh vacuum exhaust platform, and simultaneously to perform cold welding treatment on the jaw to ensure that the broken port of the exhaust pipe has extremely high air tightness, so as to keep the ultrahigh vacuum condition in the klystron. The cost of a single high-power high-efficiency microwave klystron is about millions of yuan, once the klystron is sealed off and loses effectiveness, an electron gun cathode assembly of the klystron is exposed to the atmosphere, the whole klystron is scrapped instantly, and the economic loss is immeasurable. Moreover, the high-power high-efficiency microwave klystron is large in size (the main body of an exhaust workpiece is 4 meters, and the diameter of the exhaust workpiece is 300-400 millimeters), and an oxygen-free copper pipe with a thick outer diameter and a thick wall thickness (the outer diameter can reach 30 millimeters, and the wall thickness can reach 2 millimeters) is generally used as an exhaust pipe in order to improve the exhaust efficiency, so that the sealing-off difficulty is greatly increased. For the reasons, the drying, discharging and sealing of the high-power and high-efficiency microwave klystron impose extremely strict requirements on shearing force, stability and reliability on the cold welding tongs.
Traditional cold welding pincers binding clip adopts the oblique cutting structure of scissors formula, will make copper pipe shear surface atress uneven and atress process existence time in the time of pincers disconnected copper pipe succeed: the near knife edge is stressed first and is clamped first due to the maximum stress, and the far knife edge is stressed later and is clamped later due to the smaller stress. The process of the copper pipe shear surface being clamped off has time to cause the air leakage of the pipe, so the reliability can not meet the requirement. In addition, the traditional cold welding tongs use a torque handle similar to a vice type to provide shearing force for the cutting edge of the tongs, the size of the shearing force depends on the ratio of the length of the handle to the length of the cutting edge of the tongs, the amplification mode of the force is limited by the length of the handle and is difficult to reach the size of several tons, a copper pipe with thick wall is difficult to clamp, and therefore the shearing force cannot meet the requirement. In addition, the handle of the conventional cold welding pliers is rigidly connected with the head of the pliers, and the handle is generally long in order to achieve a large shearing force, so that an operator can hold the handle during operation, the handle is difficult to shake due to the force, the shake is transmitted to the head of the pliers, the jaws are moved away from the original clipping position to cause air leakage of a pipe, and the stability of the pliers cannot meet the requirement.
Disclosure of Invention
In order to overcome the defects, the invention provides a cold welding tongs device, which greatly improves the shearing force, stability and reliability required by sealing and meets the harsh requirements of a high-power high-efficiency microwave klystron in the drying, discharging and sealing process.
The technical scheme adopted by the invention for solving the technical problem is as follows: a cold welding tongs device comprises a static tool bit, a moving tool bit sheath, a connecting rod, a fixing bolt, a hydraulic oil cylinder, a push rod, an oil conveying pipe, a hydraulic handle and a hydraulic oil storage pipe, wherein the hydraulic oil storage pipe is connected into an oil storage cavity of the hydraulic oil cylinder through the oil conveying pipe; one end of the push rod is arranged in an oil storage cavity of the hydraulic oil cylinder, the other end of the push rod is connected with the back of the movable cutter head, the movable cutter head is arranged in a cavity at the outer end of the movable cutter sheath in a sliding manner, and the inner end of the movable cutter sheath is fixedly sleeved on the outer side surface of a cylinder body of the hydraulic oil cylinder; the connecting rods are two, and two one end of the connecting rod is fixed in through the gim peg respectively move on the relative two lateral surfaces of sword sheath, the both sides limit of quiet tool bit is fixed in on the other end of two connecting rods, and this quiet tool bit with the cutting edge of moving the tool bit sets up relatively.
As a further improvement of the invention, a hydraulic valve is arranged at the joint of the hydraulic storage pipe and the oil conveying pipe.
As a further improvement of the invention, two opposite outer side edges of the movable knife sheath respectively form a square positioning block, and one ends of two connecting rods are respectively fixed on the square positioning block through fixing bolts.
As a further improvement of the invention, the oil delivery pipe is a rubber pipe.
As a further improvement of the invention, the knife edges of the movable knife head and the static knife head are respectively arc-shaped structures.
The invention has the beneficial effects that: the cold welding tongs device can easily, stably and reliably carry out the cold welding operation of cutting off the pure copper pipe with the outer diameter of 30 mm and the wall thickness of 2 mm and simultaneously carrying out the air tightness reaching the requirement of ultrahigh vacuum degree at the tongs mouth, thereby realizing the final sealing-off operation of the drying and exhausting production process of the high-power high-efficiency microwave power source device.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic sectional view of the cutting edge of the binding clip of the present invention.
The following description is made with reference to the accompanying drawings:
1-hydraulic handle; 2-hydraulic valve;
3-oil delivery pipe; 4-hydraulic oil cylinder;
5, moving the tool bit; 6-static cutter head;
7-oxygen free copper pipe; 8-connecting rod;
9-fixing bolt; 10-moving bit sheath;
11-hydraulic oil storage pipe; 12-push rod.
Detailed Description
A preferred embodiment of the present invention will be described in detail below with reference to the accompanying drawings. The scope of the invention is not limited to the following examples, but is intended to be covered by the claims and their equivalents.
Referring to fig. 1 and 2, the cold welding tongs device comprises a static cutter head 6, a moving cutter head 5, a moving cutter head sheath 10, a connecting rod 8, a fixing bolt 9, a hydraulic oil cylinder 4, a push rod 12, an oil conveying pipe 3, a hydraulic handle 1, a hydraulic oil storage pipe 11 and a hydraulic valve 2.
The hydraulic oil cylinder 4 is connected with the hydraulic handle 1 and the hydraulic oil storage pipe 11 through an oil delivery pipe 3 and a hydraulic valve 2, and forms a hydraulic oil cylinder power unit together with the push rod 12; the static cutter head 6 and the movable cutter head 5 form a tong head unit together through a connecting rod 8, a fixed bolt 9 and a movable cutter head sheath 10; the power unit of the hydraulic oil cylinder is tightly connected with the tong head unit through the thread between the movable knife head sheath and the hydraulic oil cylinder;
the hydraulic oil cylinder power unit can provide power output of 10 tons when the hydraulic handle is pressed, and the output power is longitudinally transmitted to the tong head unit through the push rod;
the movable tool bit of the tong head unit can horizontally move in the movable tool bit sheath under the power transmission of the push rod through the guider, and the tong head unit can generate 10 tons of shearing force to carry out the tong-off and cold welding operation on the copper pipe by matching with the static tool bit fixed by the connecting rod;
the working process of the cold welding tongs device is as follows:
step 1, loosening a hydraulic valve to ensure that the movable cutter head retracts into the movable cutter head sheath;
step 2, screwing off the fixing pin on one side of the binding clip, drawing out the connecting rod on the side, and keeping the opening state on one side of the binding clip;
step 3, the exhaust pipe is fixed, the clamp head surrounds the exhaust pipe from the opening, the connecting pipe is inserted, and the fixing pin is screwed;
step 4, an operator supports the tong head, the exhaust pipe is placed in the middle of the knife edge and abuts against the static knife head, and the knife edge is kept perpendicular to the exhaust pipe;
step 5, another operator closes the hydraulic valve and then operates the hydraulic handle to apply power to the moving cutter head;
step 6, transmitting the axial thrust generated by the hydraulic oil cylinder to the movable cutter head through the push rod, so that the movable cutter head is horizontally close to the static cutter head;
step 7, because the section radian of the tool bit is specially designed, the copper pipe cannot be broken at the initial stage of extruding the oxygen-free copper pipe by the movable tool bit, but the copper pipe is deformed, the section of the copper pipe is changed into a runway shape from a circular shape, and two straight edges are continuously close until the two straight edges are contacted with each other;
step 8, continuously applying thrust to the movable cutter head, starting cold welding on the mutual contact surfaces of the copper pipes under the extrusion of the movable cutter head, and cold welding the copper walls on the two sides into a whole under huge pressure;
step 9, continuously applying thrust to the movable cutter head, further extruding and deforming the copper wall which is cold welded into a whole under the extrusion of the movable cutter head, wherein the thickness of the copper wall at the top ends of the movable cutter head and the fixed cutter head is thinner and thinner, but redundant copper is extruded to the upper side and the lower side of the cutter head to form cold welding areas with certain width due to the radian of the section of the cutter head;
and step 10, with the further extrusion of the movable cutter head, the middle part of the cold welding area, which is close to the cutter point, becomes thinner and thinner until the cold welding area is clamped off, the cold welding area with a certain width bears the ultrahigh vacuum sealing task at the jaw, and the sealing-off operation is completed.
The helium mass spectrometer leak detector performs leak detection on a jaw of the oxygen-free copper pipe, and the numerical value of the leak detector does not react with helium outside the jaw at a leak rate of 10-10.
Compared with the prior art, the invention has the advantages that:
a horizontal pushing type tong head structure is adopted to replace a traditional beveling structure, the horizontal pushing type tong head is divided into a static knife head and a movable knife head, knife edges of the static knife head and the movable knife head are parallel all the time, so that the stress of a shearing surface is uniform, the time difference of the stress of a shearing part is minimum, all parts on a tong section can be simultaneously clamped, and the reliability of the tong opening is improved.
Secondly, the arc structure of the section of the cutter edge of the special designed binding clip can be well adapted to the oxygen-free copper pipe with thick diameter and thick wall thickness, so that the copper pipe is cut off by clamping and the extrusion type cold welding treatment is carried out on the cut of the copper pipe, and the reliable ultrahigh vacuum sealing performance is obtained.
Thirdly, a hydraulic handle and hydraulic oil cylinder mode is adopted to provide shearing power for the movable cutter head to replace a traditional scissor handle type transmission mode, so that the tong head can easily obtain shearing force of 10 tons.
And fourthly, the clamp head is separated from the action handle, and the traditional rigid connection mode is replaced by a mode of flexibly connecting the rubber connecting pipe in the middle, so that the influence of shaking of an operator on the displacement of a cutter edge of the clamp head during action is reduced to the maximum extent, and the stability of the cold welding tongs is improved.
Fifthly, the cutter edge of the binding clip can be replaced at any time according to the use condition, and the binding clip with different cutter edge section radians can be used for copper pipes with different wall thicknesses; the hydraulic oil cylinder can be replaced to obtain larger shearing force aiming at the copper pipe with thicker pipe diameter and thicker wall thickness.
In a word, the device can be used for easily, stably and reliably clamping and cutting off a pure copper pipe with the outer diameter of 30 mm and the wall thickness of 2 mm and simultaneously performing cold welding operation with the air tightness meeting the requirement of ultrahigh vacuum degree at the jaw position, thereby realizing the final sealing-off operation of the baking and exhausting production process of the high-power high-efficiency microwave power source device.

Claims (5)

1. A cold welding tongs device is characterized in that: the hydraulic oil device comprises a static cutter head (6), a movable cutter head (5), a movable cutter head sheath (10), a connecting rod (8), a fixing bolt (9), a hydraulic oil cylinder (4), a push rod (12), an oil conveying pipe (3), a hydraulic handle (1) and a hydraulic oil storage pipe (11), wherein the hydraulic oil storage pipe (11) is connected into an oil storage cavity of the hydraulic oil cylinder (4) through the oil conveying pipe (3), and the hydraulic handle (1) is arranged on the hydraulic oil storage pipe (11) and provides power output for the hydraulic oil storage pipe (11) to supply oil into the oil storage cavity of the hydraulic oil cylinder (4); one end of the push rod (12) is arranged in an oil storage cavity of the hydraulic oil cylinder (4), the other end of the push rod is connected with the back of the movable cutter head (5), the movable cutter head (5) is arranged in a cavity at the outer end of the movable cutter sheath (10) in a sliding manner, and the inner end of the movable cutter sheath (10) is fixedly sleeved on the outer side surface of a cylinder body of the hydraulic oil cylinder; the connecting rods (8) are two, one ends of the connecting rods (8) are respectively fixed on two outer side faces, opposite to the knife sheath (10), of the movable knife through the fixing bolts (9), two side edges of the static knife head (6) are fixed on the other ends of the two connecting rods, and the static knife head and the knife edge of the movable knife head are arranged oppositely.
2. A cold welding tongs apparatus according to claim 1 wherein: and a hydraulic valve (2) is arranged at the joint of the hydraulic storage pipe and the oil conveying pipe.
3. A cold welding tongs apparatus according to claim 1 wherein: two opposite outer sides of the movable knife sheath respectively form a square positioning block, and one ends of the two connecting rods are respectively fixed on the square positioning block through fixing bolts.
4. A cold welding tongs apparatus according to claim 1 wherein: the oil delivery pipe is a rubber pipe.
5. A cold welding tongs apparatus according to claim 1 wherein: the knife edges of the movable knife head and the static knife head are respectively arc-shaped structures.
CN202010125360.XA 2020-02-27 2020-02-27 Cold welding tongs device Pending CN111151862A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202010125360.XA CN111151862A (en) 2020-02-27 2020-02-27 Cold welding tongs device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202010125360.XA CN111151862A (en) 2020-02-27 2020-02-27 Cold welding tongs device

Publications (1)

Publication Number Publication Date
CN111151862A true CN111151862A (en) 2020-05-15

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Family Applications (1)

Application Number Title Priority Date Filing Date
CN202010125360.XA Pending CN111151862A (en) 2020-02-27 2020-02-27 Cold welding tongs device

Country Status (1)

Country Link
CN (1) CN111151862A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114273713A (en) * 2021-12-30 2022-04-05 中国电子科技集团公司第二十六研究所 Clamping and sealing method for hemispherical resonator gyroscope ultrahigh vacuum degree exhaust equipment

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114273713A (en) * 2021-12-30 2022-04-05 中国电子科技集团公司第二十六研究所 Clamping and sealing method for hemispherical resonator gyroscope ultrahigh vacuum degree exhaust equipment
CN114273713B (en) * 2021-12-30 2024-04-05 中国电子科技集团公司第二十六研究所 Clamping and sealing method for hemispherical resonator gyro ultrahigh vacuum exhaust equipment

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