CN111112542A - Form and position tolerance process for ensuring machining precision of end cover of servo motor - Google Patents
Form and position tolerance process for ensuring machining precision of end cover of servo motor Download PDFInfo
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- CN111112542A CN111112542A CN201911386731.3A CN201911386731A CN111112542A CN 111112542 A CN111112542 A CN 111112542A CN 201911386731 A CN201911386731 A CN 201911386731A CN 111112542 A CN111112542 A CN 111112542A
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- servo motor
- end cover
- motor end
- position tolerance
- ensuring
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21K—MAKING FORGED OR PRESSED METAL PRODUCTS, e.g. HORSE-SHOES, RIVETS, BOLTS OR WHEELS
- B21K3/00—Making engine or like machine parts not covered by sub-groups of B21K1/00; Making propellers or the like
- B21K3/02—Making engine or like machine parts not covered by sub-groups of B21K1/00; Making propellers or the like cylinder heads
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
- B21J1/00—Preparing metal stock or similar ancillary operations prior, during or post forging, e.g. heating or cooling
- B21J1/06—Heating or cooling methods or arrangements specially adapted for performing forging or pressing operations
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
- B21J5/00—Methods for forging, hammering, or pressing; Special equipment or accessories therefor
- B21J5/02—Die forging; Trimming by making use of special dies ; Punching during forging
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Forging (AREA)
Abstract
A form and position tolerance process for ensuring the machining precision of a servo motor end cover comprises the following steps: (1) 3D modeling of a servo motor end cover forge piece and a die is carried out by using Pro/EWildfire2.0; (2) carrying out numerical simulation of the process by using DEFORM-3Dv6.1 to ensure that the forming process parameters tend to be optimized; (3) establishing a size relation diagram according to the machining procedure of the servo motor end cover through the obtained forming process parameters; (4) establishing a process dimension chain through a dimension relation diagram; (5) and solving the process dimension chain to obtain the form and position tolerance of the servo motor end cover. The form and position tolerance process for ensuring the machining precision of the end cover of the servo motor improves the machining efficiency and the machining precision, improves the quality of the end cover of the servo motor, shortens the production period, reduces the production cost, improves the economy of the whole product and has wide application prospect.
Description
Technical Field
The invention belongs to the technical field of end cover machining processes, and particularly relates to a geometric tolerance process for ensuring machining precision of a servo motor end cover.
Background
With the development of the mechanical industry, the precision requirement on parts is higher and higher when the parts are processed. Since the precision of the whole machine and the part is related to the precision of the part, and the precision of the part is related to the machining process of the part, the research on the precision of each machining process of the part has important significance for improving the precision of the part.
When the surface of a machine part is processed, dimensional errors and form and position errors occur, and the existence of these errors affects the interchangeability of parts. Meanwhile, in the process of assembling parts, dimension errors can be accumulated, and form and position errors can be superposed, so that the matching precision and the service performance of the assembling parts can be influenced when the parts with machining errors are assembled. Therefore, the mechanical parts can ensure the normal matching relationship among all parts in the assembly body and meet the requirements of various working performances in the working process only under the condition of meeting certain dimensional tolerance and form and position tolerance requirements. Meanwhile, the reasonable selection of the dimensional tolerance, the geometric tolerance and the precision can reduce the production cost and improve the economy of the product.
The end cover is one of key parts of the servo motor, is a typical precision forging, has high requirements on dimensional accuracy and form and position tolerance, wherein the thickness tolerance is +/-0.3 mm, the external dimension tolerance is +/-0.5 mm, and the requirements on parallelism and planeness of related planes are very strict. Therefore, it is necessary to develop a form and position tolerance process for ensuring the machining precision of the end cover of the servo motor.
The Chinese patent application No. CN201910109350.4 discloses a processing technology of a curved surface appearance piece with high form and position tolerance, which is applied to electronic industrial equipment, and is used for realizing quick positioning, clamping and pressing by adopting a special tool, realizing one-time alignment, realizing repeated positioning and clamping, solving the problem that the curved surface appearance piece with high form and position tolerance is not convenient to clamp, not aiming at a servo motor end cover processing technology, and also not solving the problems of servo motor end cover processing precision and form and position tolerance.
Disclosure of Invention
The purpose of the invention is as follows: in order to overcome the defects, the invention aims to provide the form and position tolerance process for ensuring the machining precision of the end cover of the servo motor, the process is simple, the machining efficiency and the machining precision are improved, the quality of the end cover of the servo motor is improved, the normal matching relation between the end cover of the servo motor and other parts is realized, the requirements of various working performances in the working process are met, and the application prospect is wide.
The purpose of the invention is realized by the following technical scheme:
a form and position tolerance process for ensuring the machining precision of a servo motor end cover is characterized by comprising the following steps of:
(1) 3D modeling of a servo motor end cover forge piece and a die is carried out by using Pro/EWildfire2.0;
(2) carrying out numerical simulation of the process by using DEFORM-3Dv6.1 to ensure that the forming process parameters tend to be optimized;
(3) establishing a size relation diagram according to the machining procedure of the servo motor end cover through the obtained forming process parameters;
(4) establishing a process dimension chain through a dimension relation diagram;
(5) and solving the process dimension chain to obtain the form and position tolerance of the servo motor end cover.
Further, in the form and position tolerance process for ensuring the machining precision of the end cover of the servo motor, the machining process in the step (3) includes the following steps:
(1) heating in an intermediate frequency furnace: putting the 45 steel blank into an intermediate frequency furnace for heating, wherein the heating temperature is 1130-1150 ℃, and obtaining a forging piece;
(2) forging and hammering the die to make a blank and pre-forging: carrying out forging forming and pre-forging on the forging piece in a die forging hammer, wherein the die temperature of the die forging hammer is 300 ℃, the hoe mass is 1t, the energy is 24kJ, and the striking gap is 0.4 s;
(3) finish forging: and (3) putting the forged piece subjected to the preforging into a 6.3 MN friction press for final forging. The mold temperature of the 6.3 MN friction press is 300 ℃, and the mold motion parameter is 150mm/s, so that a final forging piece is obtained;
(4) shaping and trimming: at room temperature, putting the finish forging into a 1.6MN screw press for shaping and trimming;
(5) normalizing, sand blasting to remove oxide scale, and cold finishing: and after shaping and trimming, normalizing, sand blasting to remove oxide skin, and cold finishing to obtain the servo motor end cover.
Further, in the form and position tolerance process for ensuring the machining precision of the end cover of the servo motor, the establishing of the process dimension chain in the step (4) includes the following steps: and establishing the process dimension chain containing geometric tolerance by using the concentricity as a special composition ring in the process dimension chain by using a process dimension chart tracking method.
Further, in the form and position tolerance process for ensuring the machining precision of the end cover of the servo motor, the solving of the process dimension chain in the step (5) includes the following steps: the machining process of the servo motor end cover can generate a plurality of process dimension chains, the concentricity is used as a special component ring in the process dimension chains to participate in the calculation of the process dimension chains, the closed ring tolerance of each process dimension chain is equal to the sum of the component ring tolerances, the component ring tolerance of each process dimension chain comprises the dimension tolerance and the form and position tolerance of the servo motor end cover, and finally the form and position tolerance of the process dimension chains is calculated by adopting a complete interchange method.
Further, in the form and position tolerance process for ensuring the machining precision of the servo motor end cover, the form and position tolerance of the servo motor end cover obtained in the step (5) includes concentricity, parallelism, oil seal concentricity and bearing hole cylindricity of a spigot and a boss.
Further, according to the form and position tolerance process for ensuring the machining precision of the servo motor end cover, the concentricity of the spigot and the boss of the servo motor end cover is 0.02 mm.
Further, according to the form and position tolerance process for ensuring the machining precision of the servo motor end cover, the parallelism of the servo motor end cover is 0.02 mm.
Further, according to the form and position tolerance process for ensuring the machining precision of the servo motor end cover, the concentricity of the oil seal of the servo motor end cover is 0.03 mm.
Further, according to the form and position tolerance process for ensuring the machining precision of the servo motor end cover, the cylindricity of the bearing hole of the servo motor end cover is 0.01 mm.
Compared with the prior art, the invention has the following beneficial effects:
the form and position tolerance process for ensuring the machining precision of the servo motor end cover is simple in process, improves the machining efficiency and the machining precision, improves the quality of the servo motor end cover, meets the requirements of various working performances in the working process and the normal matching relation between the servo motor end cover and other parts, shortens the production period of the servo motor, reduces the production cost, improves the economy of the whole product, and has wide application prospect.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to specific embodiments, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The end cover is one of key parts of the servo motor, is a typical precision forging, has high requirements on dimensional accuracy and form and position tolerance, and has very strict requirements on parallelism and planeness of related planes. In practical application, when a servo motor end cover is machined, form and position errors occur, and the existence of the errors affects the interchangeability of the servo motor end cover. Meanwhile, in the assembling process of the servo motor end cover, form and position errors can be superposed, so that the matching precision and the service performance of the servo motor assembly parts can be influenced when the servo motor end cover with machining errors is assembled. Therefore, the normal matching relation among all parts in the servo motor assembly part assembly body can be ensured and the requirements of various working performances in the working process can be met only under the condition that the servo motor end cover meets a certain form and position tolerance requirement. Meanwhile, the reasonable selection of form and position tolerance and precision can reduce the production cost and improve the economy of the product.
Accordingly, the following embodiments provide a form and position tolerance process for ensuring machining accuracy of a servo motor end cap including forming a narrow-mouth injection mold insert on a blow-molded part and forming a narrow-mouth hardware insert on the blow-molded part.
The form and position tolerance process for ensuring the machining precision of the end cover of the servo motor comprises the following steps:
(1) 3D modeling of a servo motor end cover forge piece and a die is carried out by using Pro/EWildfire2.0;
(2) carrying out numerical simulation of the process by using DEFORM-3Dv6.1 to ensure that the forming process parameters tend to be optimized;
(3) establishing a size relation diagram according to the machining procedure of the servo motor end cover through the obtained forming process parameters;
(4) establishing a process dimension chain through a dimension relation diagram;
(5) and solving the process dimension chain to obtain the form and position tolerance of the servo motor end cover.
Further, the processing procedure in the step (3) includes the following steps:
(1) heating in an intermediate frequency furnace: putting the 45 steel blank into an intermediate frequency furnace for heating, wherein the heating temperature is 1130-1150 ℃, and obtaining a forging piece;
(2) forging and hammering the die to make a blank and pre-forging: carrying out forging forming and pre-forging on the forging piece in a die forging hammer, wherein the die temperature of the die forging hammer is 300 ℃, the hoe mass is 1t, the energy is 24kJ, and the striking gap is 0.4 s;
(3) finish forging: and (3) putting the forged piece subjected to the preforging into a 6.3 MN friction press for final forging. The mold temperature of the 6.3 MN friction press is 300 ℃, and the mold motion parameter is 150mm/s, so that a final forging piece is obtained;
(4) shaping and trimming: at room temperature, putting the finish forging into a 1.6MN screw press for shaping and trimming;
(5) normalizing, sand blasting to remove oxide scale, and cold finishing: and after shaping and trimming, normalizing, sand blasting to remove oxide skin, and cold finishing to obtain the servo motor end cover.
Further, the establishing of the process dimension chain in the step (4) includes the following steps: and establishing the process dimension chain containing geometric tolerance by using the concentricity as a special composition ring in the process dimension chain by using a process dimension chart tracking method.
Further, the solving of the process dimension chain in the step (5) includes the following steps: the machining process of the servo motor end cover can generate a plurality of process dimension chains, the concentricity is used as a special component ring in the process dimension chains to participate in the calculation of the process dimension chains, the closed ring tolerance of each process dimension chain is equal to the sum of the component ring tolerances, the component ring tolerance of each process dimension chain comprises the dimension tolerance and the form and position tolerance of the servo motor end cover, and finally the form and position tolerance of the process dimension chains is calculated by adopting a complete interchange method.
And finally, the form and position tolerance of the end cover of the servo motor obtained in the step (5) comprises the concentricity and the parallelism of the spigot and the boss, the concentricity of the oil seal and the cylindricity of the bearing hole. The concentricity of the spigot and the boss of the servo motor end cover is 0.02 mm. The parallelism of the servo motor end cover is 0.02 mm. The concentricity of an oil seal of the servo motor end cover is 0.03 mm. And the cylindricity of a bearing hole of the servo motor end cover is 0.01 mm.
The invention has many applications, and the above description is only a preferred embodiment of the invention. It should be noted that the above examples are only for illustrating the present invention, and are not intended to limit the scope of the present invention. It will be apparent to those skilled in the art that various modifications can be made without departing from the principles of the invention and these modifications are to be considered within the scope of the invention.
Claims (10)
1. A form and position tolerance process for ensuring the machining precision of a servo motor end cover is characterized by comprising the following steps of:
(1) 3D modeling of a servo motor end cover forge piece and a die is carried out by using Pro/EWildfire2.0;
(2) carrying out numerical simulation of the process by using DEFORM-3Dv6.1 to ensure that the forming process parameters tend to be optimized;
(3) establishing a size relation diagram according to the machining procedure of the servo motor end cover through the obtained forming process parameters;
(4) establishing a process dimension chain through a dimension relation diagram;
(5) and solving the process dimension chain to obtain the form and position tolerance of the servo motor end cover.
2. The form and position tolerance process for ensuring the machining precision of the end cover of the servo motor as claimed in claim 1, wherein the machining process in the step (3) comprises the following steps:
(1) heating in an intermediate frequency furnace: putting the 45 steel blank into an intermediate frequency furnace for heating, wherein the heating temperature is 1130-1150 ℃, and obtaining a forging piece;
(2) forging and hammering the die to make a blank and pre-forging: carrying out forging forming and pre-forging on the forging piece in a die forging hammer, wherein the die temperature of the die forging hammer is 300 ℃, the hoe mass is 1t, the energy is 24kJ, and the striking gap is 0.4 s;
(3) finish forging: and (3) putting the forged piece subjected to the preforging into a 6.3 MN friction press for final forging.
3. The mold temperature of the 6.3 MN friction press is 300 ℃, and the mold motion parameter is 150mm/s, so that a final forging piece is obtained;
(4) shaping and trimming: at room temperature, putting the finish forging into a 1.6MN screw press for shaping and trimming;
(5) normalizing, sand blasting to remove oxide scale, and cold finishing: and after shaping and trimming, normalizing, sand blasting to remove oxide skin, and cold finishing to obtain the servo motor end cover.
4. The form and position tolerance process for ensuring the machining precision of the end cover of the servo motor as claimed in claim 1, wherein the establishing of the process dimension chain in the step (4) comprises the following steps: and establishing the process dimension chain containing geometric tolerance by using the concentricity as a special composition ring in the process dimension chain by using a process dimension chart tracking method.
5. The form and position tolerance process for ensuring the machining precision of the end cover of the servo motor as claimed in claim 1, wherein the process dimension chain in the step (5) is solved, and the process dimension chain comprises the following steps: the machining process of the servo motor end cover can generate a plurality of process dimension chains, the concentricity is used as a special component ring in the process dimension chains to participate in the calculation of the process dimension chains, the closed ring tolerance of each process dimension chain is equal to the sum of the component ring tolerances, the component ring tolerance of each process dimension chain comprises the dimension tolerance and the form and position tolerance of the servo motor end cover, and finally the form and position tolerance of the process dimension chains is calculated by adopting a complete interchange method.
6. The form and position tolerance process for ensuring the machining precision of the end cover of the servo motor as claimed in claim 1, wherein the form and position tolerance of the end cover of the servo motor obtained in the step (5) comprises the concentricity of a spigot and a boss, the parallelism, the concentricity of an oil seal and the cylindricity of a bearing hole.
7. The form and position tolerance process for ensuring the machining precision of the servo motor end cover as claimed in claim 4, wherein the concentricity of the spigot and the boss of the servo motor end cover is 0.02 mm.
8. A form and position tolerance process for ensuring the machining precision of a servo motor end cover as claimed in claim 5, wherein the parallelism of the servo motor end cover is 0.02 mm.
9. A form and position tolerance process for ensuring the machining precision of a servo motor end cover as recited in claim 5, wherein the concentricity of an oil seal of the servo motor end cover is 0.03 mm.
10. A form and position tolerance process for ensuring the machining precision of a servo motor end cover as claimed in claim 5, wherein the cylindricity of a bearing hole of the servo motor end cover is 0.01 mm.
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| CN201911386731.3A CN111112542A (en) | 2019-12-29 | 2019-12-29 | Form and position tolerance process for ensuring machining precision of end cover of servo motor |
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| CN201911386731.3A CN111112542A (en) | 2019-12-29 | 2019-12-29 | Form and position tolerance process for ensuring machining precision of end cover of servo motor |
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