CN206092381U - Hollow plunger structure of combined type - Google Patents
Hollow plunger structure of combined type Download PDFInfo
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- CN206092381U CN206092381U CN201621140754.8U CN201621140754U CN206092381U CN 206092381 U CN206092381 U CN 206092381U CN 201621140754 U CN201621140754 U CN 201621140754U CN 206092381 U CN206092381 U CN 206092381U
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- plunger
- plunger rod
- welding
- shoulder
- piston structure
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Abstract
The utility model discloses a hollow plunger structure of combined type constitutes and to include plunger rod and the plunger sleeve that constitutes by the axial symmetry solid of revolution, is equipped with the orifice on the the central axis of plunger rod, and the plunger rod includes bottom, shoulder, neck and bulb, and edge entire circumference is equipped with recess A on the face of cylinder of bottom to shoulder, the inner cylinder face of plunger sleeve is equipped with recess B, and plunger rod and plunger sleeve pass through welded connection formation wholly in bottom and shoulder. The utility model discloses a machining is convenient, and ordinary numerical control lathe can accomplish, and the welding is firm stable.
Description
Technical field
This utility model is related to a kind of piston structure field of hydraulic planger pump, particularly a kind of compound hollow plunger knot
Structure.
Background technology
Plunger body is to constitute one of critical component of hydraulic pump/motor, and its operating mode is：Rotary inertia is big, with rotor hole wall
Sliding friction frequency is high.Reduce its rotary inertia, its interaction with rotor hole wall can be reduced, so as to reduce friction, increase
Plus the service life of pump/motor rotor mechanism.
In order to lower the rotary inertia of plunger body, spy is designed to hollow-core construction, reduces its weight, so as to reduce
The purpose of its rotary inertia.The design of plunger body hollow-core construction, is that machine adds two parts by the method for electron beam welding come real
Existing.
Existing hollow-core construction plunger body typically along the circumferential direction processes a deep annular groove in plunger bottom, then separately processes one
Annulus, annulus are welded with annular groove pairing.For compared with pillar cock body, deep annular groove difficulty in machining is larger, it is difficult to protect
Card crudy, and in less circular area, two welding anchor rings are formed, welding quality is also difficult to ensure that.
Utility model content
The purpose of this utility model is, there is provided a kind of compound hollow piston structure.Machining of the present utility model
Convenient, centre numerically controlled lathe can be completed, and firm welding is stable.
The technical solution of the utility model：A kind of compound hollow piston structure, it is characterised in that：Including by axial symmetry
Plunger rod and plunger guide bush that revolving body is constituted, the central axis of plunger rod are provided with throttle orifice, and plunger rod includes bottom, shoulder
Portion, cervical region and bulb, are provided with groove A, the inner cylinder face of the plunger guide bush along whole circumference on the face of cylinder of bottom to shoulder
Groove B is provided with, plunger rod and plunger guide bush pass through to be welded to connect to form entirety in bottom and shoulder.
In aforesaid compound hollow piston structure, weld seam A and the plunger rod diameter parallel of the bottom weld are described
The weld seam B of shoulder weld forms angle α with plunger lever shaft line.
In aforesaid compound hollow piston structure, angle α >=20 °.
In aforesaid compound hollow piston structure, the material of the plunger rod and plunger guide bush is 25Cr3MoA.
In aforesaid compound hollow piston structure, described being welded to connect is electron beam welding connection.
The electro-beam welding method of aforesaid compound hollow piston structure, is carried out in the steps below：
Two part of plunger rod and plunger guide bush is processed respectively according to drawing specification first；
Will be the plunger rod for processing and plunger guide bush gasoline soaking and washing clean, by plunger rod insertion sleeve, obtain
To molectron to be welded；
By molectron clamping to be welded, shove charge；
Electron beam welding：Vacuum≤1.0X10 in the soldering furnace of electron-beam welder-3Pa。
In aforesaid electro-beam welding method, step installation way 3. is that molectron to be welded is put into welding burner hearth
In rotary tooling scroll chuck in, plunger rod top is fitted with scroll chuck face closely, scroll chuck be placed in be horizontally mounted it is flat
On platform；
And/or, molectron to be welded is put in the rotary tooling scroll chuck in welding burner hearth, plunger rod bottom and three-jaw
The laminating of chuck face is tight, and scroll chuck is placed in and is horizontally mounted on platform, is horizontally mounted the inclination angle of platform by angle support adjustment
Degree is consistent with shoulder weld seam angle, to keep the weld seam of shoulder weld vertical.
In aforesaid electro-beam welding method, the step 4. in electron beam welding process carry out in the steps below：
4.1）Programming：Corresponding CNC numerical controls welding procedure is write according to fusion length and part to be welded material；
4.2）Focusing：Adjustment focus current size so that electron beam spot needs the surface of position of seam in part, it is ensured that electricity
Melting range when beamlet is welded includes the part for needing welding；
4.3）Operation welding procedure：After the completion of focusing, the part position of adjustment is set to weld starting point, and coordinate is shown
Show zeroing, run welding procedure, part is welded.
In aforesaid electro-beam welding method, the welding procedure is divided into three phases：Spot welding stage, welding stage and repair
The decorations weldering stage.
Compared with prior art, this utility model passes through the assembling structure for changing plunger rod and plunger guide bush, also using electricity
Beamlet is welded, and so as to reduce its rotary inertia, reduces its interaction with rotor hole wall, so as to reduce friction, increases pump/horse
Up to the service life of rotor mechanism.Machining of the present utility model is convenient, and centre numerically controlled lathe can be completed, and firm welding
It is stable.This utility model is also combined with specific electro-beam welding method, is further ensured that welding quality.
It is more convenient that this utility model processes part, particularly the machining of small size part, part working (machining) efficiency
Also be greatly improved, can general NC lathe batch production, also weld seam causes electron beam welding in bottom and shoulder respectively
Quality is readily obtained guarantee, so as to improve friction pair service life.
Description of the drawings
Fig. 1 is this utility model compound hollow piston structure generalized section；
Fig. 2 is this utility model hollow plunger plunger rod physical dimension figure；
Fig. 3 is this utility model hollow plunger plunger guide bush physical dimension figure；
Fig. 4 is this utility model plunger bottom welding clamping schematic diagram；
Fig. 5 is this utility model plunger shoulder welding clamping schematic diagram；
Fig. 6 is the displaing micro picture of this utility model postwelding open tubular column cock body bottom weld seam A；
Fig. 7 is the displaing micro picture of this utility model postwelding open tubular column cock body shoulder weld seam B.
Labelling in accompanying drawing for：1- plunger rods, 2- plunger guide bushs, 3- bottoms, 4- shoulders, 5- cervical regions, 6- bulbs, 7- throttlings
Hole, 8- weld seam A, 9- weld seam B, 10- groove A, 11- groove B.
Specific embodiment
With reference to the accompanying drawings and examples this utility model is further described, but is not intended as to this utility model
The foundation of restriction.
Embodiment.A kind of compound hollow piston structure, is constituted as shown in figure 1, including by Axisymmetric Revolution body composition
Plunger rod 1 and plunger guide bush 2, the central axis of plunger rod 1 is provided with throttle orifice 7, and plunger rod 1 includes bottom 3, shoulder 4, neck
Portion 5 and bulb 6, are provided with groove A10, the interior cylinder of the plunger guide bush 2 along whole circumference on the face of cylinder of bottom 3 to shoulder 4
Face is provided with groove B11, and plunger rod 1 and plunger guide bush 2 connect to form entirety by electron beam welding in bottom 3 and shoulder 4.
The weld seam A8 of 3 weld of the bottom and 1 diameter parallel of plunger rod, the weld seam B9 and post of 4 weld of the shoulder
Stopper rod axis forms angle α.Angle α >=20 °.That is, plunger rod forms the two basic change face of weld when loading plunger guide bush,
One combines for the face of cylinder, and another is combined for taper seat.The main purpose one for arranging α angles is avoided in terms of geometrical relationship
The position of bulb, two melting ranges when being to ensure that welding are only comprising the part for needing welding, and not can relate to stopper rod body.
The material of the plunger rod 1 and plunger guide bush 2 is 25Cr3MoA.
The size of described plunger rod 1 can be with as shown in Fig. 2 the size of described plunger guide bush 2 can be as shown in Figure 3.
According to the electro-beam welding method of described compound hollow piston structure, carry out in the steps below：
Two part of plunger rod and plunger guide bush is processed respectively according to drawing specification first；
Will be the plunger rod for processing and plunger guide bush gasoline soaking and washing clean, by plunger rod insertion sleeve, obtain
To molectron to be welded；
By molectron clamping to be welded, shove charge；
Electron beam welding：Vacuum≤1.0X10 in the soldering furnace of electron-beam welder-3Pa。
Step installation way 3. includes that bottom welding clamps mode and shoulder welding clamps mode；Bottom weld clip
Dress mode as shown in figure 4, be by molectron to be welded be put into welding burner hearth in rotary tooling scroll chuck in, plunger rod top with
The laminating of scroll chuck face is tight, and scroll chuck is placed in and is horizontally mounted on platform；Shoulder welding clamps mode as shown in figure 5, will treat
Weldering molectron is put in the rotary tooling scroll chuck in welding burner hearth, and plunger rod bottom is fitted with scroll chuck face closely, and three
Dog chuck is placed in and is horizontally mounted on platform, is horizontally mounted angle of inclination and the shoulder weld seam angle one of platform by angle support adjustment
Cause, to keep the weld seam of shoulder weld vertical.
The step 4. in electron beam welding process carry out in the steps below：
4.1 programming：Corresponding CNC numerical controls welding procedure is write according to fusion length and part to be welded material；
4.2 focusing：Adjustment focus current size so that electron beam spot needs the surface of position of seam in part, it is ensured that electricity
Melting range when beamlet is welded includes the part for needing welding；
4.3 operation welding procedures：After the completion of focusing, the part position of adjustment is set to weld starting point, and coordinate is shown
Show zeroing, run welding procedure, part is welded.
The welding procedure is divided into three phases：Spot welding stage, welding stage and modification weldering stage.
Electro-beam welding method of the present utility model specifically can following steps enforcement：
Step 1：Two part of plunger rod and plunger guide bush is processed respectively according to drawing specification first.
Step 2：The part for processing is clean with gasoline soaking and washing, assembled according still further to structure shown in Fig. 1, i.e.
By in plunger rod insertion sleeve, molectron to be welded is obtained；According to Fig. 2, Fig. 3 illustrated dimension and the plunger of 25Cr3MoA materials processings
Bar and plunger guide bush, the assembling magnitude of misalignment at seam position must not exceed 0.1mm.
Step 3：Clamping, shove charge：The rotation work molectron to be welded that step 2 is assembled being put in electron-beam welder body of heater
In dress scroll chuck, make plunger end face fit closely with scroll chuck face, thus assure that the precision of welding position.Such as Fig. 3, figure
Shown in 4, during the taper seat of welding plunger rod and plunger guide bush, the vertical of welding position is realized by angle support, angle support
The combination frustoconical bevel angle of angle of inclination and plunger rod and plunger guide bush is identical.
Step 4：Electron beam welding：All the time control vacuum≤1.0X10 in stove-3Pa, and electronics is carried out according to procedure below
Beam is welded：
4.1）Conventional programming：Suitable CNC numerical control welding procedures are write according to fusion length and part to be welded material；
4.2）It is conventional to focus：Adjustment focus current size so that electron beam spot needs the surface of position of seam in part, really
Protect part of the melting range comprising needs welding during electron beam welding；
4.3）Operation welding procedure：After the completion of focusing, the part position of adjustment is set to weld starting point, and coordinate is shown
Show zeroing, run welding procedure（Welding procedure is write by CNC）, part is welded.The program is actual including three phases：
4.3.1）Spot welding：
Plunger rod bottom：Heater current 3.8A；Accelerating potential 60Kv；Spot welding line 3mA, spot welding quantity circumferential weld uniform three
Point, 15 ° of spot welding scope；75 ° of weldering speed is per second.
Plunger rod shoulder：Heater current 3.8A；Accelerating potential 60Kv；Spot welding line 3mA, spot welding quantity circumferential weld uniform three
Point, 15 ° of spot welding scope；75 ° of weldering speed is per second.
4.3.2）Welding：
Plunger rod bottom：Heater current 4.0A；Accelerating potential 60Kv；Welding line 18mA；175 ° of weldering speed is per second；Focus on inclined
Shifting amount -29mA.
Plunger rod shoulder：Heater current 4.1A；Accelerating potential 60Kv；Welding line 23mA；135 ° of weldering speed is per second；Focus on inclined
Shifting amount -35mA.
4.3.3）Modification weldering：
Plunger rod bottom：Heater current 3.8A；Accelerating potential 60Kv；Welding line 8mA；100 ° of weldering speed is per second；Focus on inclined
Shifting amount -20mA.
Plunger rod shoulder：Heater current 3.8A；Accelerating potential 60Kv；Welding line 8mA；100 ° of weldering speed is per second；Focus on inclined
Shifting amount -25mA.
After plunger rod bottom is welded, part takes out, and plunger rod shoulder is welded, and repeats 4.1）With 4.2）Focusing
With operation welding procedure.
Weldment is taken out, welding is completed.
From the welding point displaing micro picture of Fig. 6 and Fig. 7, qualitative can find out that this utility model postwelding joint is continuously caused
It is close, realize the welding of bar and two part of sleeve.
Claims (5)
1. a kind of compound hollow piston structure, it is characterised in that：Including the plunger rod constituted by Axisymmetric Revolution body（1）With
Plunger guide bush（2）, plunger rod（1）Central axis be provided with throttle orifice（7）, plunger rod（1）Including bottom（3）, shoulder（4）、
Cervical region（5）And bulb（6）, bottom（3）To shoulder（4）The face of cylinder on be provided with groove A along whole circumference（10）, the plunger bushing
Cylinder（2）Inner cylinder face be provided with groove B（11）, plunger rod（1）And plunger guide bush（2）In bottom（3）And shoulder（4）By welding
Connection forms overall.
2. compound hollow piston structure according to claim 1, it is characterised in that：The bottom（3）The weldering of weld
Seam A（8）With plunger rod（1）Diameter parallel, the shoulder（4）The weld seam B of weld（9）Angle α is formed with plunger lever shaft line.
3. compound hollow piston structure according to claim 2, it is characterised in that：Angle α >=20 °.
4. compound hollow piston structure according to claim 1, it is characterised in that：The plunger rod（1）And plunger bushing
Cylinder（2）Material be 25Cr3MoA.
5. the compound hollow piston structure according to any one of claim 1-4, it is characterised in that：Described is welded to connect
It is electron beam welding connection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621140754.8U CN206092381U (en) | 2016-10-20 | 2016-10-20 | Hollow plunger structure of combined type |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621140754.8U CN206092381U (en) | 2016-10-20 | 2016-10-20 | Hollow plunger structure of combined type |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206092381U true CN206092381U (en) | 2017-04-12 |
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ID=59975895
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621140754.8U Active CN206092381U (en) | 2016-10-20 | 2016-10-20 | Hollow plunger structure of combined type |
Country Status (1)
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| CN (1) | CN206092381U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106438335A (en) * | 2016-10-20 | 2017-02-22 | 中航力源液压股份有限公司 | Composite hollow plunger structure and electron beam welding method for the same |
-
2016
- 2016-10-20 CN CN201621140754.8U patent/CN206092381U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106438335A (en) * | 2016-10-20 | 2017-02-22 | 中航力源液压股份有限公司 | Composite hollow plunger structure and electron beam welding method for the same |
| CN106438335B (en) * | 2016-10-20 | 2019-02-26 | 中航力源液压股份有限公司 | A kind of compound hollow piston structure and its electro-beam welding method |
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