CN111922633A - Machining process for spindle end threads of steering knuckle - Google Patents
Machining process for spindle end threads of steering knuckle Download PDFInfo
- Publication number
- CN111922633A CN111922633A CN202010599351.4A CN202010599351A CN111922633A CN 111922633 A CN111922633 A CN 111922633A CN 202010599351 A CN202010599351 A CN 202010599351A CN 111922633 A CN111922633 A CN 111922633A
- Authority
- CN
- China
- Prior art keywords
- steering knuckle
- shaft
- thread
- knuckle
- machining
- 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.)
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Classifications
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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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23Q—DETAILS, 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
- B23Q3/00—Devices holding, supporting, or positioning work or tools, of a kind normally removable from the machine
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B41/00—Component parts such as frames, beds, carriages, headstocks
- B24B41/06—Work supports, e.g. adjustable steadies
- B24B41/067—Work supports, e.g. adjustable steadies radially supporting workpieces
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23Q—DETAILS, 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
- B23Q2703/00—Work clamping
- B23Q2703/02—Work clamping means
- B23Q2703/10—Devices for clamping workpieces of a particular form or made from a particular material
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Grinding And Polishing Of Tertiary Curved Surfaces And Surfaces With Complex Shapes (AREA)
- Steering-Linkage Mechanisms And Four-Wheel Steering (AREA)
Abstract
The invention provides a processing technology of a spindle end thread of a steering knuckle, which comprises the following steps: step S1: axially fixing the steering knuckle on a numerical control lathe, and performing semi-finish turning on the shaft neck of the steering knuckle; step S2: milling a shaft head of the steering knuckle to be flat; step S3: and performing finish turning machining on the shaft neck, the shaft head and the shaft end threads on the shaft head of the steering knuckle on the same numerical control lathe in sequence. The invention realizes the processing technology of the thread at the end of the steering knuckle shaft, which has high universality, high processing efficiency of the whole technology, convenient operation and high processing precision by adopting the mutual combined action of the optimization of the processing technology of the thread at the end of the steering knuckle shaft and the improvement of the structure on the fixing clamp in the processing technology.
Description
Technical Field
The invention relates to the technical field of steering knuckle processing, in particular to a process for processing a thread at a shaft end of a steering knuckle.
Background
In the steering knuckle processing technology, the thread at the shaft end of the steering knuckle needs to be processed and formed. The existing processing technology of the spindle end thread of the steering knuckle comprises the following steps: semi-finish turning of the shaft neck on the numerical control lathe, finish turning of the shaft head → thread rolling of the shaft head on the thread rolling machine → milling of the shaft head flat through a milling machine → finish turning of the shaft neck on the numerical control lathe → manual thread slipping to remove the flat milled silt edge. However, the processing technology has the following disadvantages: 1. the end screw thread of the steering knuckle shaft is processed by a thread rolling machine, each thread rolling wheel can only process the shaft end screw thread with a specific size, and the processing universality of the device is not high; 2. the process of the thread at the end of the roller is independent of the process of turning other parts of the steering knuckle, and the shaft head needs to be finely turned before the thread at the end of the roller to ensure the diameter before rolling, so that the process is complicated, the processing speed of the thread at the end of the roller is higher than that of other processes, and the whole process processing time is not shortened; 3. the thread rolling process of the shaft end is arranged before the milling process of the shaft end, and a special worker is needed to slide and buckle to remove the silt edge after the thread of the shaft end is machined and formed; 4. the fixing clamp in the prior art is only tightly abutted and fixed through the ejector pins at two ends, a fixing mechanism in the radial direction is lacked, and when the end part is subjected to thread rolling processing, a steering knuckle rotates and is easy to deviate from an axis to jump, so that the thread processing precision is not high, and a central hole of the steering knuckle is easy to damage.
Therefore, a new process for machining the end thread of the steering knuckle shaft is needed to solve the problems in the prior art.
Disclosure of Invention
The invention realizes the processing technology of the thread at the end of the steering knuckle shaft, which has high universality, high processing efficiency of the whole technology, convenient operation and high processing precision by adopting the mutual combined action of the optimization of the processing technology of the thread at the end of the steering knuckle shaft and the improvement of the structure on the fixing clamp in the processing technology.
The technical purpose of the invention is realized by the following technical scheme: the machining process of the spindle end thread of the steering knuckle comprises the following steps:
step S1: axially fixing the steering knuckle on a numerical control lathe, and performing semi-finish turning on the shaft neck of the steering knuckle;
step S2: milling a shaft head of the steering knuckle to be flat;
step S3: and performing finish turning machining on the shaft neck, the shaft head and the shaft end threads on the shaft head of the steering knuckle on the same numerical control lathe in sequence.
As a further arrangement of the invention, the machined shaft head is sequentially provided with a cylindrical polished rod section and a threaded section from the end part to the shaft neck direction, and a screwing-in chamfer is arranged at the threaded end of the threaded section.
As a further arrangement of the invention, the length of the cylindrical lightbar is 13.5mm and the diameter of the cylindrical lightbar is 42 mm.
As a further development of the invention, the screw-in chamfer alpha is 30 DEG, and the radius R is 2 mm.
As a further development of the invention, the thread pair fit tolerance d is 5h6 h.
As a further arrangement of the present invention, in step S1, the driving end of the knuckle is fixed on the fixture, the first center hole of the driving end is matched with the first thimble of the fixture, the slide box at the end far away from the fixture is moved, and the second thimble of the slide box is matched with the second center hole of the rod shaft head of the knuckle.
As a further arrangement of the invention, a first positioning hole matched with the size and the position of the upper lug of the steering knuckle is arranged on the clamp, and a second positioning hole matched with the size and the position of the lower lug of the steering knuckle is also arranged on the clamp.
As a further arrangement of the invention, the clamp also comprises a supporting seat, the supporting seat corresponds to the shaft head of the steering knuckle, a plurality of supporting and polishing mechanisms are arranged on the supporting seat, each supporting and polishing mechanism comprises an arc-shaped plate hinged on the supporting seat, one end of each arc-shaped plate close to the ground is provided with a supporting roller, and the other end of each arc-shaped plate is fixedly provided with a polishing block.
As a further arrangement of the invention, a return spring is arranged between the arc-shaped plate and the supporting seat.
As a further arrangement of the invention, the upper surface of the supporting seat is provided with a concave curved surface, and the concave curved surface is matched with the contour of the shaft head.
The beneficial effect of this scheme is:
1. the invention sets the processing technology of the shaft end thread of the steering knuckle as semi-finish turning of the shaft neck on a numerical control lathe → milling of the shaft head on a milling machine → then finish turning of the shaft neck, the shaft head and the shaft end thread on the shaft head on the same numerical control lathe.
2. The invention changes the existing processing mode of processing the shaft end thread by adopting a thread rolling machine, adopts the turning mode of a numerical control lathe to turn and form the shaft end thread, combines the thread turning process and the shaft neck turning process in the processing process, can realize the processing of the steering knuckle shaft neck and the shaft end thread by adopting the same numerical control lathe, can change the nominal diameter, the thread pitch, the tolerance and other dimensions of the shaft end thread only by modifying the program and the processing parameters of the numerical control lathe, and improves the processing universality and the flexibility of the device.
3. According to the invention, the machining process of the shaft end thread is arranged after the shaft end milling process, the thread is machined and formed by the numerical control lathe, and simultaneously the silt edge generated by milling is removed, so that the process of manually sliding and removing the silt edge is omitted, the process operation is simplified, and the labor cost is reduced.
4. When the steering knuckle is required to be clamped and fixed on the fixture, the upper lug of the steering knuckle is inserted into the positioning hole I, the lower lug is inserted into the positioning hole II, the center hole of the fork part is matched with the ejector pin, the primary positioning of the steering knuckle can be quickly realized, the slide carriage box on one side of the steering knuckle, far away from the fixture, is close to the steering knuckle until the ejector pin on the slide carriage box tightly abuts against the center hole at the head of the steering knuckle, the axial fixing of the steering knuckle is realized, the positioning hole I and the positioning hole II are located on two sides of an axis, when a thread at the end of the axis needs to be machined, and when the steering knuckle rotates, the positioning hole I and the positioning hole II can limit the steering knuckle to jump in the radial direction, so that the machining precision of the thread at the end of the axis is effectively improved.
5. The clamp also comprises a supporting seat, wherein the supporting seat is provided with a plurality of supporting polishing mechanisms, each supporting polishing mechanism comprises an arc-shaped plate hinged on the supporting seat, one end of each arc-shaped plate is provided with a supporting roller, and the other end of each arc-shaped plate is fixedly provided with a polishing block; when the cutter on the lathe turns the shaft end downwards, the shaft end slightly moves downwards, the supporting roller moves downwards, and due to the lever principle, the polishing block at the other end of the arc plate tilts to contact the surface of the shaft end, so that the turning and the polishing are simultaneously carried out, the processing operation is simplified, and the efficiency of the thread processing at the shaft end is improved.
6. The finish-turned spindle nose comprises a cylindrical polished rod section and a threaded section, so that the thread length of the spindle end of the steering knuckle is shortened, the cylindrical polished rod section does not participate in the matching of a thread pair after the assembly is finished, the process that a locking nut is screwed into the thread at the spindle end of the steering knuckle during the assembly of an automobile front axle is simplified, the scratching probability of the thread pair is reduced, the assembly rejection rate is reduced, and the cylindrical polished rod section avoids the collision of the thread at the spindle end in the transferring process, so that the reject ratio of products is further reduced.
7. The invention reduces the screwing chamfer of the end screw thread of the steering knuckle shaft, so that the guidance quality of the locking nut screwed in the end screw thread of the steering knuckle shaft in the assembling process is good, thereby improving the assembling efficiency.
8. According to the invention, the fit clearance of the internal thread and the external thread is reduced, and the fit torque of the thread pair is improved, so that the occurrence probability of quality accidents of wheel flying caused by the fact that the thread at the shaft end of the steering knuckle is slipped and buckled in the normal running process of a vehicle is greatly reduced.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
FIG. 1 is a side view of the head of the present invention;
FIG. 2 is a side view schematic of the head of the present invention;
FIG. 3 is a schematic structural view of the knuckle of the present invention fixed in the front view direction of a numerically controlled lathe;
FIG. 4 is a schematic view of the right view of the knuckle of the present invention mounted on a support base;
FIG. 5 is a schematic structural view of the support base of the present invention.
In the figure, the polishing device comprises a transmission end 1, a transmission end 2, a clamp 3, a first central hole 4, a first thimble 5, a second thimble 6, a shaft head 7, a second central hole 8, a first steering knuckle lug 9, a first positioning hole 10, a second steering knuckle lug 11, a second positioning hole 12, a supporting seat 13, a supporting polishing mechanism 14, an arc-shaped plate 15, a supporting roller 16, a polishing block 17, a reset spring 18, a cylindrical polished rod section 19 and a thread section.
Detailed Description
The technical solution of the present invention will be clearly and completely described below with reference to specific embodiments. It is to be understood that the described embodiments are merely a few embodiments of the invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present invention without any inventive step, are within the scope of the present invention.
Referring to fig. 1-3, the process for machining the threads at the shaft end of the steering knuckle comprises the following steps:
step S1: axially fixing the steering knuckle on a numerical control lathe, and performing semi-finish turning on the shaft neck of the steering knuckle;
step S2: milling and flattening the shaft head 6 of the steering knuckle;
step S3: and performing finish turning machining on the shaft neck of the steering knuckle, the shaft head 6 and the threads of the shaft end on the shaft head 6 in sequence on the same numerical control lathe.
Specifically, the machined and formed shaft head 6 is sequentially provided with a cylindrical polished rod section 18 and a threaded section 19 from the end part to the shaft neck direction, and a screwing-in chamfer is arranged at the thread screwing-in end of the threaded section 19.
Specifically, the length of cylindrical polished rod is 13.5mm, and the diameter of cylindrical polished rod is 42 mm.
Specifically, the screw-in chamfer α is 30 °, and the radius R is 2 mm.
Specifically, the thread pair fit tolerance d is 5h6 h.
Specifically, in step S1, the driving end 1 of the knuckle is fixed on the fixture 2, the first center hole 3 of the driving end 1 is matched with the first thimble 4 of the fixture 2, the slide box located at the end far away from the fixture 2 is moved, and the second thimble 5 of the slide box is matched with the second center hole 7 of the spindle nose 6 of the rod portion of the knuckle.
Specifically, the clamp 2 is provided with a first positioning hole 9 matched with the upper lug 8 of the steering knuckle in size and position, and the clamp 2 is further provided with a second positioning hole 11 matched with the lower lug 10 of the steering knuckle in size and position.
Referring to fig. 4 and 5, the fixture 2 further includes a supporting seat 12, the supporting seat 12 corresponds to the spindle head 6 of the knuckle, a plurality of supporting polishing mechanisms 13 are disposed on the supporting seat 12, each supporting polishing mechanism 13 includes an arc-shaped plate 14 hinged to the supporting seat 12, a supporting roller 15 is disposed at one end of the arc-shaped plate 14 close to the ground, and a polishing block 16 is fixedly disposed at the other end of the arc-shaped plate 14.
Specifically, a return spring 17 is arranged between the arc plate 14 and the support seat 12.
Specifically, the upper surface of the supporting seat 12 is provided with a concave curved surface 13, and the concave curved surface 13 is matched with the contour of the shaft head 6.
The working process is as follows: the supporting polishing mechanism 13 comprises an arc-shaped plate 14 hinged on the supporting seat 12, one end of the arc-shaped plate 14 is provided with a supporting roller 15, the other end of the arc-shaped plate 14 is fixedly provided with a polishing block 16, when the steering knuckle is not machined, the supporting roller 15 tilts, and the steering knuckle plays a role in rolling support when rotating; when the cutter on the lathe turns the shaft end downwards, the shaft end slightly moves downwards, the supporting roller 15 moves downwards, and due to the lever principle, the polishing block 16 at the other end of the arc plate 14 tilts to contact the surface of the shaft end, so that the turning and the polishing are simultaneously carried out, the processing operation is simplified, and the efficiency of processing the thread at the shaft end is improved.
The process for machining the end thread of the steering knuckle shaft provided by the invention is described in detail above. The principles and embodiments of the present invention are explained herein using specific examples, which are set forth only to help understand the method and its core ideas of the present invention. It should be noted that, for those skilled in the art, it is possible to make various improvements and modifications to the present invention without departing from the principle of the present invention, and those improvements and modifications also fall within the scope of the claims of the present invention.
Claims (10)
1. The machining process of the spindle end thread of the steering knuckle is characterized by comprising the following steps of:
step S1: axially fixing the steering knuckle on a numerical control lathe, and performing semi-finish turning on the shaft neck of the steering knuckle;
step S2: milling a shaft head (6) of the steering knuckle flat;
step S3: and performing finish turning machining on the shaft neck, the shaft head (6) and the shaft end threads of the steering knuckle on the same numerical control lathe in sequence.
2. The process for machining the threads at the shaft end of the steering knuckle according to claim 1, wherein the machined shaft head (6) is sequentially provided with a cylindrical polished rod section (18) and a threaded section (19) from the end part to the shaft neck direction, and a screwing-in chamfer is arranged at the thread screwing-in end of the threaded section (19).
3. The process of claim 2, wherein the cylindrical polished rod has a length of 13.5mm and a diameter of 42 mm.
4. The process of claim 2, wherein the screw-in chamfer α is 30 ° and the radius R is 2 mm.
5. The process of claim 2, wherein the thread pair has a tolerance d of 5h6 h.
6. The process of claim 1, wherein the step S1 is to fix the driving end (1) of the knuckle on the fixture (2), to match the center hole one (3) of the driving end (1) with the center pin one (4) of the fixture (2), to move the carriage box at the end far from the fixture (2), to match the center pin two (5) of the carriage box with the center hole two (7) of the axle head (6) of the knuckle rod.
7. The machining process of the threads at the shaft end of the steering knuckle according to claim 6, wherein a first positioning hole (9) matched with the upper lug (8) of the steering knuckle in size and position is formed in the clamp (2), and a second positioning hole (11) matched with the lower lug (10) of the steering knuckle in size and position is further formed in the clamp (2).
8. The steering knuckle spindle end thread machining process according to claim 7, wherein the clamp (2) further comprises a supporting seat (12), the supporting seat (12) corresponds to the spindle head (6) of the steering knuckle in position, a plurality of supporting polishing mechanisms (13) are arranged on the supporting seat (12), each supporting polishing mechanism (13) comprises an arc-shaped plate (14) hinged to the supporting seat (12), one end, close to the ground, of each arc-shaped plate (14) is provided with a supporting roller (15), and the other end of each arc-shaped plate is fixedly provided with a polishing block (16).
9. The process for machining a thread at the shaft end of a steering knuckle according to claim 8, wherein a return spring (17) is arranged between the arc-shaped plate (14) and the supporting seat (12).
10. The process for machining the end thread of the knuckle spindle according to claim 8, wherein the upper surface of the support seat (12) is provided with a concave curved surface (13), and the concave curved surface (13) is matched with the profile of the spindle head (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010599351.4A CN111922633B (en) | 2020-06-28 | 2020-06-28 | Machining process for spindle end threads of steering knuckle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010599351.4A CN111922633B (en) | 2020-06-28 | 2020-06-28 | Machining process for spindle end threads of steering knuckle |
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| Publication Number | Publication Date |
|---|---|
| CN111922633A true CN111922633A (en) | 2020-11-13 |
| CN111922633B CN111922633B (en) | 2021-09-24 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202010599351.4A Active CN111922633B (en) | 2020-06-28 | 2020-06-28 | Machining process for spindle end threads of steering knuckle |
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|---|---|
| CN111922633B (en) | 2021-09-24 |
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