CN110102987B - Chuck machining process - Google Patents
Chuck machining process Download PDFInfo
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- CN110102987B CN110102987B CN201910503617.8A CN201910503617A CN110102987B CN 110102987 B CN110102987 B CN 110102987B CN 201910503617 A CN201910503617 A CN 201910503617A CN 110102987 B CN110102987 B CN 110102987B
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- 238000003754 machining Methods 0.000 title claims description 9
- 238000003825 pressing Methods 0.000 claims abstract description 13
- 238000012545 processing Methods 0.000 claims abstract description 13
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 12
- 239000010959 steel Substances 0.000 claims abstract description 12
- 238000005516 engineering process Methods 0.000 claims abstract description 11
- 238000012937 correction Methods 0.000 claims abstract description 10
- 238000004080 punching Methods 0.000 claims description 12
- 238000000465 moulding Methods 0.000 claims description 4
- 230000000149 penetrating effect Effects 0.000 claims description 2
- 238000000034 method Methods 0.000 description 11
- 238000005259 measurement Methods 0.000 description 4
- 230000002035 prolonged effect Effects 0.000 description 3
- 238000012360 testing method Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- UAJUXJSXCLUTNU-UHFFFAOYSA-N pranlukast Chemical compound C=1C=C(OCCCCC=2C=CC=CC=2)C=CC=1C(=O)NC(C=1)=CC=C(C(C=2)=O)C=1OC=2C=1N=NNN=1 UAJUXJSXCLUTNU-UHFFFAOYSA-N 0.000 description 1
- 229960004583 pranlukast Drugs 0.000 description 1
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03C—POSITIVE-DISPLACEMENT ENGINES DRIVEN BY LIQUIDS
- F03C1/00—Reciprocating-piston liquid engines
- F03C1/02—Reciprocating-piston liquid engines with multiple-cylinders, characterised by the number or arrangement of cylinders
- F03C1/06—Reciprocating-piston liquid engines with multiple-cylinders, characterised by the number or arrangement of cylinders with cylinder axes generally coaxial with, or parallel or inclined to, main shaft axis
- F03C1/0602—Component parts, details
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Jigs For Machine Tools (AREA)
- Turning (AREA)
Abstract
The invention discloses a chuck processing technology, which comprises the following steps of a, blanking a steel plate with the thickness of 2mm by using a blanking die to obtain a product A, b, forming, and adopting the forming methodThe die punches a central boss (11) on a central boss prefabricated hole (1), punches a ball socket boss (21) on a ball socket boss prefabricated hole (2) to obtain a product B, C and correction are carried out, the product B is corrected by adopting a correction die to obtain a product C, d and ball pressing are carried out, a central boss ball socket (12) is punched on the central boss (11) of the product C by adopting a ball pressing die, a ball socket (22) is punched on the ball socket boss (21), and the sizes of the central boss ball socket (12) and the ball socket (22) are equal to that of the central boss ball socket (12)
And ensuring that the flatness of the back surface (N) and the end surface (M) of the ball socket is less than or equal to 0.1mm to obtain a product D, and turning the excircle of a ball socket boss (21) of the product D to obtain a finished product. The chuck manufactured by the invention is used for the quantitative motor and has the advantage of long service life of the motor.
Description
Technical Field
The invention belongs to the field of chuck processing technology of a quantitative motor.
Background
In the R403 type quantitative motor, a chuck is used for fixing a plunger assembly to a main shaft, fourteen screw holes, seven ball sockets and a central boss ball socket are arranged on the chuck and are used for being connected with the main shaft, and the plunger assembly comprises a plunger rod and a plunger ball head arranged at the end part of the plunger rod. When the quantitative motor operates, the plunger rod does reciprocating linear motion in the plunger hole of the rotor, and rotates through the two fulcrums of the main shaft and the plunger body, no clamping stagnation is allowed during rotation, otherwise, the friction force between the plunger ball head and the main shaft ball socket is increased, a supporting oil film cannot be established between the main shaft ball socket and the ball head of the plunger rod, the plunger rod ball head and the main shaft ball socket generate heat due to friction, the temperature can reach 200-300 ℃, further generates frictional adhesion, causes the phenomena of burning, adhesion and locking of the plunger rod ball head and the main shaft ball socket, meanwhile, the service life of the quantitative motor can be influenced by the play amount of the plunger assembly in the ball socket, the plunger assembly can be collided with the chuck when the play amount is too large, the phenomena of burning, adhesion and locking of the ball head of the plunger rod and the ball socket of the main shaft can be caused when the play amount is too small, and the service life of the quantitative motor can be reduced when the play amount is too large and too small.
The existing chuck processing technology comprises three stamping processes of blanking, forming and ball pressing in sequence, and then turning to process the outer circle of a ball socket matched with a main shaft. When the quantitative motor is formed and stamped, due to the fact that the formed blanking force is large, deformation of the chuck is large, deformation of a surface (the front surface of the chuck) located with the main shaft can reach 0.20-0.30 mm, rotation clamping stagnation of the plunger rod can be caused when the quantitative motor is assembled in the quantitative motor, and the service life of the quantitative motor is shortened.
During ball pressing and stamping, in order to enable the plunger assembly to have proper play in the ball socket, the ball centers of all the ball sockets are required to be equal in height and limited to the inaccuracy of the existing measuring mode, and the height tolerance range of each ball center of the ball socket can only be guaranteed to be +/-0.05 mm, and the error amplitude reaches 0.1 mm. The front of a chuck is used as a positioning surface in the conventional measuring mode, a depth gauge is adopted to measure the distance from the ball center of each ball socket to the positioning surface, the measured size requirement is 4.75 +/-0.05 mm, the measured tolerance is small, large errors exist during detection by the depth gauge, and the measurement is inaccurate due to stamping deformation, so that the measured value and the actual value have large deviation, the measuring result is difficult to reflect the real condition of the chuck, an unqualified chuck can be used as a qualified product, the rotation clamping stagnation of a plunger rod can be caused when the unqualified chuck is assembled in a quantitative motor, and the service life of the quantitative motor is shortened.
When the excircle of the ball socket is lathed, the chuck is fixed on a lathe through a lathe fixture, the straight shaft on the lathe fixture is used as a positioning element to pass through the ball socket for positioning, the deformation of each ball socket is difficult to ensure the same, the size of each ball socket is difficult to ensure the same, the gaps between each straight shaft and each ball socket are different, so that the chuck can deviate during lathing, the excircle turning precision of a ball socket boss is reduced, and in addition, the chuck is assembled in a quantitative motor because the sizes of the screw holes of fourteen screws on the chuck are all the same
And the screw hole size of the main shaft is M5, the position degree is phi 0.15mm, after the chuck is assembled to the main shaft, the single screw hole has the maximum 0.75mm of movement amount, so that the mounting position of the chuck on the main shaft is inaccurate, the rotation clamping stagnation of the plunger rod is caused, the axial movement of the plunger component in the ball socket of the main shaft is too small, and the service life of the quantitative motor is reduced.
In the assembly process of the quantitative motor, after the chuck is fastened to the main shafts through screws, when 3-4 plungers rotate, the seven plungers installed on each main shaft are blocked, the screws are loosened, the axial play amount of the plunger assembly is large or small and cannot be controlled, and the ball socket of the main shaft and the ball head of the plunger rod are locked. After the quantitative motor test, the phenomena of burning of a ball socket of a main shaft and burning and peeling of a ball head of a plunger rod occur, even the ball socket of the main shaft and the ball head of the plunger rod are locked, and the quantitative motor cannot be used.
Therefore, the chuck manufactured by the existing chuck processing technology for the quantitative motor has the defect of short service life of the motor.
Disclosure of Invention
The invention aims to provide a chuck processing technology. The chuck manufactured by the invention is used for the quantitative motor and has the advantage of long service life of the motor.
The technical scheme of the invention is as follows: a chuck processing technology comprises the following steps of,
a. blanking, namely blanking a steel plate with the thickness of 2mm by using a blanking die to obtain a product A, wherein the diameter of the product A is 110mm, a central boss prefabricated hole, a ball socket boss prefabricated hole and a screw hole are formed in the product A,
b. molding, namely punching a central boss on the central boss prefabricated hole and punching a ball socket boss on the ball socket boss prefabricated hole by adopting a molding die to obtain a product B,
c. correcting, namely correcting the product B by using a correction die to ensure that the flatness of the back surface of the product B is less than or equal to 0.1mm to obtain a product C,
d. pressing the ball, namely punching a central boss ball socket on a central boss of the product C by adopting a ball pressing die, and punching a ball socket on a ball socket boss, wherein the sizes of the central boss ball socket and the ball socket are both
And ensure that the planeness of the back surface and the end surface of the ball socket is less than or equal to 0.1mm to obtain a product D,
e. turning the excircle of the ball socket boss of the D product to ensure that the diameter of the excircle of the ball socket boss is
And obtaining a finished product.
In the above-mentioned chuck processing process, in the step a, the size of the screw hole is set to
In the above-mentioned chuck processing process, in step b, the sizes of the inner holes of the central boss and the ball socket boss are both equal to each other
In the above chuck processing technology, in the step c, the correcting die corrects the product B through the punch, and the flatness of the back surface N of the product B is less than or equal to 0.1mm by controlling the stroke of the punch.
In the processing technology of the chuck, in the step d, the ball pressing die punches the central boss ball socket on the central boss of the product C through the punch press and punches the ball socket on the ball socket boss, and the flatness of the back surface and the end surface of the ball socket are both guaranteed to be less than or equal to 0.1mm by controlling the stroke of the punch press.
In the above-mentioned chuck processing technology, in the step D, two steel balls with diameters of 26.997 ± 0.001mm and 27.031 ± 0.001mm, a lever micrometer and a block gauge are used to detect the height tolerance of the ball center of each ball socket by using the back as a reference, a first-level knife edge flat ruler is used to detect the flatness of the back N and the end face of each ball socket, and a stamping piece with the height tolerance of the ball center of each ball socket less than or equal to 0.05mm, the flatness of the back N and the end face M of each ball socket less than or equal to 0.1mm is used as a product D.
In the above chuck machining process, in the step e, the product D is fixed to a lathe by using a lathe fixture for lathe machining, and the lathe fixture is provided with a taper mandrel penetrating through a ball socket.
Compared with the prior art, the invention adds the correction die to correct the chuck after the forming and stamping process of the chuck, reduces the deformation of the chuck, has a flat positioning surface of the chuck main shaft (the front surface of the chuck), can reduce the rotation clamping stagnation of the plunger rod when being assembled in the quantitative motor, ensures the axial movement of the plunger assembly in the ball socket of the main shaft, and prolongs the service life of the quantitative motor.
The invention also improves the method for measuring whether the ball centers of all ball sockets on the chuck are equal in height after the ball pressing and stamping process, the measurement is more accurate, the measurement value is close to the actual value, the measurement result can accurately reflect the real condition of the chuck, the unqualified product can not enter the qualified product, the rotation and clamping stagnation of the plunger rod caused by the assembly of the unqualified product in the quantitative motor can be avoided, the proper axial displacement of the plunger assembly in the ball socket of the main shaft can be ensured, and the service life of the quantitative motor can be prolonged.
When the outer circle of the ball socket is turned, the straight shaft on the lathe fixture is replaced by the conical shaft to position the chuck, the concentricity of the conical shaft and the ball socket is better, the chuck cannot deviate during turning, the turning precision of the outer circle of the boss of the ball socket is improved, the chuck is assembled in the quantitative motor and cannot easily cause the rotation clamping stagnation of the plunger rod, the axial movement amount of the plunger assembly in the ball socket of the main shaft is ensured, and the service life of the quantitative motor is prolonged.
The invention adopts a new measuring mode to improve the measuring accuracy, thereby reducing the height tolerance of the ball socket center and reducing the original +/-0.05 mm to the original +/-0.05 mm
The axial movement amount of the plunger assembly in the ball socket is reduced and stabilized to be 0.10-0.15mm, the plunger assembly has proper movement amount in the ball socket, the rotation clamping stagnation of the plunger rod can be reduced, and the service life of the quantitative motor is prolonged.
In the assembly process of the quantitative motor, the fact that after the chuck manufactured by the invention is fastened to the main shafts by screws is found that seven plungers arranged on each main shaft can rotate smoothly, the axial movement change of the plunger assembly is small, and the ball socket of the main shaft and the ball head of the plunger rod cannot be locked. After the quantitative motor test, the phenomena of burning of a main shaft ball socket and burning and peeling of a plunger rod ball head can be avoided, the main shaft ball socket and the plunger rod ball head can not be locked, and the quantitative motor can still be normally used.
Therefore, the chuck manufactured by the invention has the advantage of long service life of the motor when being used for the quantitative motor.
Drawings
Fig. 1 is a front view of article a.
Fig. 2 is a front view of article B.
Fig. 3 is a left side view of article B.
Fig. 4 is a front view of the correction die.
Fig. 5 is a top view of the correction die.
Fig. 6 is a left side view of article D.
Fig. 7 is a front view of the finished chuck.
Fig. 8 is a left side view of the finished chuck.
The labels in the figures are: the method comprises the following steps of 1-center boss prefabricated hole, 11-center boss, 12-center boss ball socket, 2-ball socket boss prefabricated hole, 21-ball socket boss, 22-ball socket, 3-screw hole, N-front side, T-back side and M-ball socket end face.
Detailed Description
The invention is further illustrated by the following figures and examples, which are not to be construed as limiting the invention.
Examples are given. A chuck processing technology comprises the following steps,
a. blanking, namely blanking a steel plate with the thickness of 2mm by using a blanking die according to a drawing to obtain an A product shown in figure 1, wherein the diameter of the outer ring of the A product is 110mm, the A product is provided with a central boss prefabricated hole 1, seven ball socket boss prefabricated holes 2, fourteen ball socket boss prefabricated holes and a screw hole 3, and the size of the screw hole 3 is that
b. Forming by punching a central boss 11 on the central boss prefabricated hole 1 and punching a socket boss 21 on the socket boss prefabricated hole 2 by using a forming die to obtain a product B shown in figures 2 and 3, wherein the product B is obtainedThe sizes of the inner holes of the central boss 11 and the ball socket boss 21 are both
c. Correcting, namely adopting a correction die as shown in figures 4 and 5, wherein the correction die is provided with a plurality of through holes matched with the ball socket boss 21 and the central boss 11, placing the product B in the correction die, correcting the product B through a JB23-60 type punch press, and controlling the stroke of the punch press to ensure that the flatness of the back N of the product B is less than or equal to 0.1mm to obtain a product C;
d. pressing the ball, namely firstly punching a central boss ball socket 12 on a central boss 11 of a C product and punching a ball socket 22 on a ball socket boss 21 by adopting a ball pressing die through a JB23-60 punch press, wherein the sizes of the central boss ball socket 12 and the ball socket 22 are the same
The flatness of the back surface N and the ball socket end surface M is ensured to be less than or equal to 0.1mm by controlling the stroke of the punch press, and D is obtained1The product is measured for the height of the ball centers of the ball sockets 22 to measure the qualified D1The product is used as product D shown in figure 6,
e. turning the outer circle of the ball socket boss 21 of the D product to ensure that the diameter of the outer circle of the ball socket boss 21 is equal to
And obtaining a finished product.
In the step d, a method for measuring whether the centers of the ball sockets 22 are equal in height:
firstly, a magnetic square box and a magnetic gauge stand are placed on a measuring platform, a lever dial gauge is fixed on the magnetic gauge stand, and a block gauge and a D gauge are placed on the lever dial gauge stand1Putting the product on a magnetic square box, wherein the thickness Ka of a block gauge is 2+4.75+ (26.997 +/-0.001)/2, taking the top end of the block gauge as a zero position of a lever dial indicator, and then putting steel balls (small steel balls for short) with the diameter of 26.997 +/-0.001 mm on D sequentially1Measuring the height value of the top of the small steel ball on each ball socket 22 of the product by a dial indicator to obtain a maximum value P and a minimum value Q;
② the magnetic square box and the magnetic meter seat are placed onOn the measuring platform, the lever dial indicator is fixed on the magnetic gauge stand, and the block gauge and the D gauge are connected1Putting the product on a magnetic square box, setting the thickness Kb of the second combined block gauge to be 2+4.75+ (27.031 +/-0.001)/2 mm, using the top end of the block gauge as a zero position, and then successively putting steel balls (large steel balls for short) with the diameter of 27.031 +/-0.001 mm on D by using a lever dial gauge1Measuring the height value of the top of the large steel ball on each ball socket 22 of the product by using a dial indicator on each ball socket 22 to obtain another maximum value R and another minimum value S;
③ D of the following conditions1Product D is product D: P-Q is less than or equal to 0.05mm, and R-S is less than or equal to 0.05 mm.
In the step e, the product D is fixed on a lathe by using an existing lathe fixture for lathing, a straight shaft on the existing lathe fixture is replaced by a tapered mandrel (a straight shaft with a taper can be understood), and the tapered mandrel passes through the ball socket 22 to position the product D.
The chuck manufactured by the invention is used for the quantitative motor and has the advantage of long service life of the motor.
Claims (6)
1. A chuck processing technology is characterized in that: comprises the following steps of (a) carrying out,
a. blanking, namely blanking a steel plate with the thickness of 2mm by using a blanking die to obtain a product A, wherein the diameter of the product A is 110mm, a central boss prefabricated hole (1), a ball-and-socket boss prefabricated hole (2) and a screw hole (3) are arranged on the product A,
b. molding, namely punching a central boss (11) on the central boss prefabricated hole (1) and punching a ball socket boss (21) on the ball socket boss prefabricated hole (2) by adopting a molding die to obtain a product B,
c. correcting, namely correcting the product B by using a correction die to ensure that the flatness of the back surface (N) of the product B is less than or equal to 0.1mm to obtain a product C,
d. pressing the ball, namely punching a central boss ball socket (12) on a central boss (11) of the C product and punching a ball socket (22) on a ball socket boss (21) by adopting a ball pressing die, wherein the sizes of the central boss ball socket (12) and the ball socket (22) are the same
And ensure the flatness of the back surface (N) and the ball socket end surface (M)Less than or equal to 0.1mm to obtain product D,
e. turning the excircle of the ball socket boss (21) of the D product to ensure that the excircle diameter of the ball socket boss (21) is equal to
Obtaining a finished product;
in the step D, two steel balls with the diameters of 26.997 +/-0.001 mm and 27.031 +/-0.001 mm, a dial indicator and a block gauge are adopted to detect the height tolerance of the sphere center of each ball socket (22) by taking the back (N) as a reference, a first-level knife edge flat ruler is adopted to detect the flatness of the back (N) and the end face (M) of each ball socket, and stamping parts with the height tolerance of the sphere center of each ball socket (22) less than or equal to 0.05mm and the flatness of the back (N) and the end face (M) of each ball socket less than or equal to 0.1mm are taken as D products.
2. The chuck machining process according to claim 1, wherein: in the step a, the size of the screw hole (3) is
3. The chuck machining process according to claim 1, wherein: in the step b, the sizes of the inner holes of the central boss (11) and the ball socket boss (21) are all the same
4. The chuck machining process according to claim 1, wherein: in the step c, the correcting die corrects the B product through the punch, and the flatness of the back surface (N) of the B product is enabled to be less than or equal to 0.1mm by controlling the stroke of the punch.
5. The chuck machining process according to claim 1, wherein: in the step d, the ball pressing die punches a central boss ball socket (12) on a central boss (11) of the product C through a punch press, punches a ball socket (22) on a ball socket boss (21), and guarantees that the planeness of the back surface (N) and the planeness of the ball socket end surface (M) are both less than or equal to 0.1mm by controlling the stroke of the punch press.
6. The chuck machining process according to claim 1, wherein: and in the step e, fixing the D product on a lathe by using a lathe fixture for lathing, wherein the lathe fixture is provided with a taper mandrel penetrating through a ball socket (22).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910503617.8A CN110102987B (en) | 2019-06-12 | 2019-06-12 | Chuck machining process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910503617.8A CN110102987B (en) | 2019-06-12 | 2019-06-12 | Chuck machining process |
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| Publication Number | Publication Date |
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| CN110102987A CN110102987A (en) | 2019-08-09 |
| CN110102987B true CN110102987B (en) | 2020-12-22 |
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| CN201910503617.8A Active CN110102987B (en) | 2019-06-12 | 2019-06-12 | Chuck machining process |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| DE202013101391U1 (en) * | 2013-03-31 | 2013-04-29 | Sascha Fechner | Pressure difference generator |
| CN104028951B (en) * | 2014-06-13 | 2017-03-15 | 江苏盈科汽车空调有限公司 | A kind of ball-and-socket processing technology of Vehicular air-conditioner compressor planetary plate |
| CN104384828B (en) * | 2014-08-29 | 2017-01-25 | 温州市阳泰紧固件有限公司 | Gas meter pipe joint and production process thereof |
| CN104368945A (en) * | 2014-09-18 | 2015-02-25 | 亳州市好运钢圈有限责任公司 | Manufacturing technology for integrated wheel hub |
| CN106563924A (en) * | 2016-11-02 | 2017-04-19 | 成都创虹科技有限公司 | Manufacturing process of high-corrosion resistance valve core |
| CN109396254A (en) * | 2017-08-17 | 2019-03-01 | 衡阳风顺车桥有限公司 | The upper and lower piece cold punching technology in F128 rear axle housing middle section |
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Address after: 29 Caohu Avenue, Xiangcheng District, Suzhou, Jiangsu Province Patentee after: Suzhou Liyuan Hydraulic Co.,Ltd. Address before: 29 Caohu Avenue, Xiangcheng District, Suzhou, Jiangsu Province Patentee before: LIYUAN HYDRAULIC (SUZHOU) Co.,Ltd. |