Automobile bearing cover milling device and production process thereof

Abstract

The application relates to a milling surface device for an automobile bearing cover and a production process thereof, which comprises a machine tool, a milling surface cutter, a clamping tool and a moving mechanism, the output end of the moving mechanism is provided with a base, a rotary disc and a power assembly, the rotary disc is provided with a first transmission shaft and a second transmission shaft, a switching mechanism for switching and transmitting power of the power assembly to the first transmission shaft or the second transmission shaft is arranged between the base and the rotary disc; an edge trimming seat is arranged on the rotary disc, a semicylindrical edge trimming column and a semicircular edge trimming disc are rotationally arranged on the edge trimming seat, a transmission mechanism for simultaneously transmitting the rotary power of the second transmission shaft to the edge trimming column and the edge trimming disc is arranged on the edge trimming seat, the rotary angular velocities of the edge trimming column and the edge trimming disc are the same, and the circular arc side of the edge trimming disc deviates from the intersection of the bearing cover mounting surface and the inner arc surface of the mounting groove during the process that the circular arc side of the edge trimming column sweeps through the intersection. The application can trim the intersection of the bearing cover mounting surface and the inner arc surface of the mounting groove.

Description

Technical Field

[0001] This application relates to the technical field of milling equipment, and in particular to a milling device for automobile bearing caps and its manufacturing process. Background Technology

[0002] Automotive bearing caps are critical components in engine and transmission systems used to fix and support bearings. They ensure the axial positioning of the bearing outer ring or bushing, preventing misalignment during operation. They also work with seals to prevent dust and moisture from entering the bearing, extending its service life. Bearing caps are typically made of cast iron or steel. During machining, the bearing caps require milling to ensure the contact surface with the bearing housing or cylinder head meets flatness requirements (e.g., Ra ≤ 3.2 μm), preventing loose assembly or stress concentration due to uneven surfaces.

[0003] like Figure 1 The image shows an automotive engine bearing cover, comprising a bearing cover body with a mounting groove at its bottom and two mounting surfaces on either side of the mounting groove. In existing machining operations for automotive engine bearing cover parts, the part is typically positioned using a fixture, and then the fixture with the bearing cover part mounted is placed on a milling machine. The milling machine then performs milling operations on the inner arc surface of the mounting groove and the two mounting surfaces of the automotive engine bearing cover part.

[0004] Chinese patent application CN201711153092.7 discloses a milling machine for engine crankshaft bearing covers, comprising a support base, a protective cover mounted on the upper surface of the support base, a support platform fixed to the upper surface of the support base and disposed within the protective cover, a bearing groove assembly, a motor connected to the bearing groove assembly via a transmission mechanism, a support component mounted on the upper surface of the support base and cooperating with the bearing groove assembly, a support seat mounted on the upper surface of the support base and located on the other side of the support component, and a bearing seat fixed on the support seat and cooperating with the bearing groove assembly. The bearing groove assembly includes a transmission fixture with one end connected to the transmission mechanism, a transmission shaft with one end fixed inside the transmission fixture and the other end passing through the bearing seat, a tool body fixture fixed to the outer circumferential surface of the transmission shaft, and a tool body mounted on the tool body fixture. This design effectively reduces vibration during machining, thereby improving machining quality.

[0005] The related art in the above has the following defects: since the two mounting surfaces of the bearing cover and the inner arc surface of the mounting groove are mainly used for abutting installation with the cylinder cover and circumferential positioning of the bearing, the surface smoothness has a higher requirement, and good precision needs to be controlled during milling surface processing, but when the two mounting surfaces and the inner arc surface of the mounting groove are respectively milled, it is difficult to achieve good flatness at the junction of the two, and even burrs appear, which is not conducive to improving the milling quality. SUMMARY

[0006] In order to improve the problem that the junction of the bearing cover mounting surface and the inner arc surface of the mounting groove is prone to poor flatness defects during milling surface processing, the application provides an automobile bearing cover milling device and a production process thereof.

[0007] The first aspect of the application provides an automobile bearing cover milling device adopting the following technical scheme:

[0008] An automobile bearing cover milling device, comprising a machine tool, a milling cutter, a clamping tool, and a moving mechanism for driving the milling cutter to move, the output end of the moving mechanism is provided with a base, the base is provided with a rotary disc and a power assembly, the rotary disc is provided with a first transmission shaft and a second transmission shaft arranged at an included angle, the milling cutter is installed on the first transmission shaft, and a switching mechanism for switching and transmitting the power of the power assembly to the first transmission shaft or the second transmission shaft is arranged between the base and the rotary disc;

[0009] A trimming seat is installed on the rotary disc, a semicylindrical trimming column and a semicircular trimming disc are rotatably arranged on the trimming seat, a transmission mechanism for simultaneously transmitting the rotary power of the second transmission shaft to the trimming column and the trimming disc is arranged on the trimming seat, the rotary angular velocities of the trimming column and the trimming disc are the same, the rotary direction of the trimming disc is from the lowest part to the highest part of the bearing cover mounting groove, and the circular arc side of the trimming disc faces away from the junction during the process that the circular arc side of the trimming column sweeps the junction of the bearing cover mounting surface and the inner arc surface of the mounting groove.

[0010] The lower end surface of the trimming column is used for trimming the bearing cover mounting surface, the trimming disc is used for trimming the inner arc surface of the bearing cover mounting groove, the axis of the trimming column is orthogonal to the axis of the trimming disc, and the outer diameter of the trimming disc is the same as the diameter of the inner arc surface of the mounting groove.

[0011] Further, the outer diameter of the trimming column is greater than the width of the bearing cover mounting surface.

[0012] Further, an inner concave arc surface is arranged on the side of the flat surface of the trimming column facing the rotary direction, the inner concave arc surface extends upward along the axis of the trimming column and gradually converges.

[0013] Further, the transmission mechanism comprises:

[0014] A first rotating shaft is rotatably mounted on the trimming seat, and the trimming column is coaxially connected with the first rotating shaft.

[0015] A second rotating shaft is rotatably mounted on the trimming seat, and the second rotating shaft is parallel to the first rotating shaft and is drivingly connected with the first rotating shaft.

[0016] A support is fixedly connected with the trimming seat, and a reversing assembly for horizontally reversing the power output of the lower end of the second rotating shaft by 90° is mounted on the bottom end of the support, and the output end of the reversing assembly is provided with the trimming disc.

[0017] Further, the trimming column is detachably mounted on the first rotating shaft, and the trimming disc is detachably mounted on the output end of the reversing assembly.

[0018] Further, a mounting plate horizontally arranged on the first rotating shaft and a T-shaped strip arranged along the axial direction of the first rotating shaft are fixedly connected with the first rotating shaft, a avoiding slot for embedding the first rotating shaft is formed in the middle of the flat surface of the trimming column, and a T-shaped slot adapted to the T-shaped strip is formed in the avoiding slot, and the mounting plate is provided with a first fixing member for fixing the top of the trimming column.

[0019] Further, a mounting disc is fixedly connected with the output end of the reversing assembly, a plurality of concentric circular arc slots are formed in the mounting disc, a positioning arc strip adapted to the concentric circular arc slots is fixedly connected with the inner arc side of the trimming disc, and the mounting disc is provided with a second fixing member for fixing the trimming disc.

[0020] Further, a rotary joint in communication with external compressed air is mounted at the axial center of the mounting disc, a gas jet nozzle arranged along the radial direction of the mounting disc is fixedly connected with the mounting disc, the gas jet nozzle is in communication with the output end of the rotary joint, and the gas jet nozzle is arranged at one end close to the trimming disc and facing the rotating direction of the trimming disc.

[0021] Further, the switching mechanism comprises:

[0022] A first square shaft is arranged along the axial direction of the first transmission shaft, and the line connecting the first square shaft and the first transmission shaft passes through the center of the rotary disc, a first square hole adapted to the first square shaft is formed in the end of the first transmission shaft, the first square shaft is elastically arranged on the rotary disc along the radial direction of the rotary disc, and in the initial state, there is a gap between the first square shaft and the two ends of the first transmission shaft, and the other end of the first square shaft extends out of the rotary disc.

[0023] A second square shaft is arranged along the axial direction of the second transmission shaft, and the line connecting the second square shaft and the second transmission shaft passes through the center of the rotary disc, a second square hole adapted to the second square shaft is formed in the end of the second transmission shaft, the second square shaft is elastically arranged on the rotary disc along the radial direction of the rotary disc, and in the initial state, there is a gap between the second square shaft and the two ends of the second transmission shaft, and the other end of the second square shaft extends out of the rotary disc.

[0024] The output end of the power assembly is provided with a power shaft, the lower end of the power shaft is provided with a third square hole which is adapted to be inserted into the first square hole and the second square hole, the base is fixedly provided with an arc plate which is arranged around the rotary disc, and the arc top of the arc plate is provided with a through hole which is communicated with the third square hole.

[0025] When the first square shaft or the second square shaft is slid into the third square hole under the guidance of the arc side in the arc plate, the other end of the first square shaft or the second square shaft is inserted into the corresponding first square hole or the second square hole.

[0026] The second aspect of the present application provides a kind of milling surface processing technology of automobile bearing cover, which adopts the following technical scheme:

[0027] A kind of milling surface processing technology of automobile bearing cover, based on the above-mentioned milling surface device of automobile bearing cover, comprising the following steps:

[0028] S1. the bearing cover to be processed is fixed by the clamping tool, the moving mechanism is controlled to work with preset program, and the first transmission shaft is driven to rotate by the power assembly, so that the milling cutter is milled to the bearing cover to be processed;

[0029] S2. after milling surface processing is completed, the rotary disc is rotated, and the power of the power assembly is switched and transmitted to the second transmission shaft by the switching mechanism, the trimming column and the trimming disc are synchronously rotated by the transmission mechanism, so that the trimming disc is trimmed to the inner arc surface of bearing cover mounting groove, and the trimming column is trimmed to the bearing cover mounting surface at the same time, and the two do not interfere with each other in the rotating process, so as to trim the junction of the inner arc surface of the mounting groove and the bearing cover mounting surface;

[0030] S3. the moving mechanism is controlled to work along the path, so that the trimming disc moves axially along the bearing cover mounting groove, to completely trim the bearing cover processing surface;

[0031] S4. after trimming is completed, the base is lifted by the moving mechanism, the bearing cover is taken off from the clamping tool and a new bearing cover to be processed is replaced, the rotary disc is rotated in reverse to switch the power of the power assembly to the first transmission shaft by the switching mechanism, and steps S1-S3 are repeated.

[0032] In summary, the beneficial technical effects of the present application are:

[0033] 1. by switching mechanism, the power of the power assembly is switched to the first transmission shaft or the second transmission shaft, the milling operation and the trimming operation can be flexibly switched, without the need for secondary positioning, which can greatly improve the processing efficiency of the automobile bearing cover;

[0034] 2. The power of the second transmission shaft is transmitted to the first and second rotating shafts through the transmission mechanism, so that the trimming column and the trimming disc rotate synchronously at the same angular velocity; moreover, during the process that the arc side of the trimming column sweeps through the junction of the bearing cover mounting surface and the inner arc surface of the mounting groove, the arc side of the trimming disc is away from the junction, so that the trimming column and the trimming disc do not interfere with each other when rotating at high speed, and the junction of the bearing cover mounting surface and the inner arc surface of the mounting groove can be alternately trimmed, so as to effectively ensure the flatness of the junction after milling, and improve the milling quality; and after the trimming of one mounting surface of the bearing cover is completed, the base only needs to be rotated by 180° by controlling the moving mechanism, so that the other mounting surface and the inner arc surface of the mounting groove can be alternately trimmed, and the trimming operation is more convenient;

[0035] 3. The inner concave arc surface is arranged on the side of the trimming column flat surface facing the rotating direction, and extends upward along the axial direction of the trimming column and gradually converges, so that the chips trimmed on the mounting surface can be converged into the space formed by the inner concave arc surface when the trimming column rotates, and the chips can be guided out of the mounting surface by the characteristics of the inner concave arc surface, and the chips will not re-enter the bearing cover mounting groove;

[0036] 4. The first square shaft and the second square shaft corresponding to the first transmission shaft and the second transmission shaft are elastically arranged in the rotary disc, so that the rotary disc can transmit the rotating power of the power shaft to the first transmission shaft or the second transmission shaft as needed when rotating by 90°, so that the milling operation and the trimming operation can be switched more flexibly and conveniently, and the milling cutter and the trimming column and the trimming disc will not interfere with each other. BRIEF DESCRIPTION OF DRAWINGS

[0037] Figure 1 is the overall structure schematic diagram of the embodiment of the application when performing the trimming operation;

[0038] Figure 2 is the overall structure schematic diagram of the embodiment of the application when performing the milling operation;

[0039] Figure 3 is the cross-sectional structure schematic diagram of the trimming column and the first rotating shaft of the embodiment of the application;

[0040] Figure 4 is the partial structure schematic diagram of the trimming disc and the second rotating shaft of the embodiment of the application;

[0041] Figure 5 is the cross-sectional structure schematic diagram of the embodiment of the application, mainly used for showing the switching mechanism.

[0042] MARKING DESCRIPTION:

[0043] 1, machine tool; 11, face milling cutter; 12, clamping tool; 13, moving mechanism;

[0044] 2, base; 21, rotary disc; 22, power assembly; 23, power shaft; 231, third side hole; 24, arc plate; 241, through hole;

[0045] 31, first transmission shaft; 311, first square hole; 32, first square shaft;

[0046] 41, second transmission shaft; 411, second square hole; 42, second square shaft;

[0047] 5, trimming seat;

[0048] 61, trimming column; 611, concave arc surface; 612, avoiding groove; 613, T-shaped groove; 62, first rotating shaft; 621, T-shaped strip; 63, mounting plate;

[0049] 71, trimming disc; 711, positioning arc strip; 72, second rotating shaft; 73, support; 74, reversing assembly; 75, mounting disc; 751, concentric circular arc groove; 752, rotary joint; 753, air jet; 754, air pipe;

[0050] 81, guide ring; 82, guide hole; 83, limiting ring; 84, spring;

[0051] 9, bearing cover body; 91, mounting groove; 92, mounting surface. DETAILED DESCRIPTION

[0052] The technical solutions of the present application will be described clearly and completely below with reference to the drawings. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0053] The embodiments of the present application disclose a kind of automobile bearing cover face milling device. Refer to Figure 1 and Figure 2It comprises a machine tool 1, a face milling cutter 11, a clamping tool 12 and a moving mechanism 13 for driving the face milling cutter 11 to move, wherein the moving mechanism 13 can be controlled in moving track by a preset program, and the clamping tool 12 is also a conventional tool for adapting the bearing cover, which are all conventional technical means and will not be described here. The output end of the moving mechanism 13 is provided with a base 2, the base 2 is provided with a rotary disc 21 and a power assembly 22, the power assembly 22 can be a servo motor; the rotary disc 21 is provided with a first transmission shaft 31 and a second transmission shaft 41 which are arranged at an included angle, the face milling cutter 11 is installed on the first transmission shaft 31, and the base 2 and the rotary disc 21 are provided with a switching mechanism for switching and transmitting the power of the power assembly 22 to the first transmission shaft 31 or the second transmission shaft 41.

[0054] With reference to Figure 1 , Figure 3 and Figure 4 , the rotary disc 21 is provided with an edging seat 5, the edging seat 5 is provided with a semicylindrical edging column 61 and a semicircular edging disc 71 which rotate, the lower end surface of the edging column 61 is used for trimming the bearing cover mounting surface 92, the outer arc surface of the edging disc 71 is used for trimming the inner arc surface of the bearing cover mounting groove 91, the axis of the edging column 61 is orthogonal to the axis of the edging disc 71, the outer diameter of the edging column 61 is greater than the width of the bearing cover mounting surface 92, and the outer diameter of the edging disc 71 is the same as the diameter of the inner arc surface of the mounting groove 91, so that the edging column 61 and the edging disc 71 can perform the edging work on the mounting groove 91 and one mounting surface 92 of the bearing cover once in a single direction, and the edging work efficiency can be greatly improved.

[0055] Furthermore, the edging seat 5 is provided with a transmission mechanism for transmitting the rotary power of the second transmission shaft 41 to the edging column 61 and the edging disc 71 at the same time, the rotary angular velocities of the edging column 61 and the edging disc 71 are the same, the rotary direction of the edging disc 71 is from the lowest part to the highest part of the bearing cover mounting groove 91; and when the circular arc side of the edging column 61 sweeps through the junction of the bearing cover mounting surface 92 and the inner arc surface of the mounting groove 91, the circular arc side of the edging disc 71 is away from the junction, so as to avoid collision and interference between the edging column 61 and the edging disc 71 in high-speed rotary edging. Meanwhile, the flat side of the edging column 61 which faces the rotary direction is provided with an inner concave arc surface 611 which extends upward along the axis of the edging column 61 and gradually converges, so that the edging column 61 can gather the swarf trimmed on the mounting surface 92 into the space formed by the inner concave arc surface 611 in rotary edging, and guide the swarf out of the mounting surface 92 by the characteristics of the inner concave arc surface 611 which is narrow at the top and wide at the bottom, and avoid the swarf from re-entering the bearing cover mounting groove 91.

[0056] Thus, when milling the bearing cover, first, the bearing cover to be processed is fixed by the clamping tool 12, and the installation groove 91 is upward, and then the power of the power assembly 22 is switched to the first transmission shaft 31 by the switching mechanism, and the first transmission shaft 31 rotates to drive the milling cutter 11 to rotate at high speed, and then the base 2 is driven to move by the setting program control moving mechanism 13 to realize the milling of the two processing surfaces of the bearing cover and the inner arc surface of the installation groove 91. After the milling is completed, the power of the power assembly 22 is switched to the second transmission shaft 41 by the switching mechanism, and the second transmission shaft 41 rotates at high speed to drive the trimming column 61 and the trimming disc 71 to rotate synchronously at the same angular velocity by the transmission mechanism, and the base 2 is continuously driven to move by the moving mechanism 13, so that the trimming column 61 can trim and smooth the installation surface 92 of the bearing cover when rotating at high speed, and the trimming disc 71 also trims the inner arc surface of the installation groove 91 when rotating at high speed. Moreover, since the arc side of the trimming disc 71 is away from the junction of the installation surface 92 and the inner arc surface of the installation groove 91 during the process of the arc side of the trimming column 61 passing through the junction, the trimming column 61 and the trimming disc 71 do not interfere with each other when rotating at high speed, and the junction of the installation surface 92 and the inner arc surface of the installation groove 91 can be alternately trimmed, which can effectively ensure the flatness of the junction after milling and improve the milling quality.

[0057] When the trimming of one installation surface 92 of the bearing cover is completed, the base 2 is only rotated by 180° by controlling the moving mechanism 13, and the junction of the other installation surface 92 and the inner arc surface of the installation groove 91 can be alternately trimmed, so that the trimming operation is more convenient, and the efficiency of milling the bearing cover is improved after the milling operation is completed without the need for secondary positioning.

[0058] Specifically, in order to ensure the stable work of the trimming column 61 and the trimming disc 71, referring to Figure 1 、 Figure 3 and Figure 4 , the transmission mechanism comprises:

[0059] The first rotating shaft 62 is rotatably installed on the trimming base 5, and the trimming column 61 is coaxially connected with the first rotating shaft 62;

[0060] The second rotating shaft 72 is rotatably installed on the trimming base 5, and the second rotating shaft 72 is parallel to the first rotating shaft 62 and is drivingly connected with the first rotating shaft 62, specifically, the second rotating shaft 72 and the first rotating shaft 62 can be drivingly connected by synchronous wheels and synchronous belts, or can be drivingly connected by sprocket chains, and the second transmission shaft 41 is coaxially fixedly connected with the second rotating shaft 72; and

[0061] The support 73 is fixed to the trimming seat 5 and is arranged along the second rotating shaft 72 in an axial direction, and the bottom end of the support 73 is provided with a reversing assembly 74 for reversing the power output of the lower end of the second rotating shaft 72 by 90 degrees horizontally, and the output end of the reversing assembly 74 is provided with the trimming disc 71. Specifically, the second rotating shaft 72 is arranged in the support 73 and the lower end of the second rotating shaft 72 is rotatably connected to the lower end of the support 73, and the reversing assembly 74 can be a combination of two bevel gears or a small bevel gear box, and the input end of the reversing assembly 74 is coaxially fixed to the lower end of the second rotating shaft 72, and the output end of the reversing assembly 74 is coaxially fixed to the center of the trimming disc 71.

[0062] Therefore, when the switching mechanism switches the power of the power assembly 22 to the second transmission shaft 41, the second transmission shaft 41 drives the second rotating shaft 72 to rotate at high speed, and the second rotating shaft 72 drives the first rotating shaft 62 to rotate synchronously, and the first rotating shaft 62 drives the trimming post 61 to rotate, and the second rotating shaft 72 drives the trimming disc 71 to rotate at the same angular velocity through the reversing assembly 74, so that the trimming disc 71 and the trimming post 61 can rotate synchronously at the same angular velocity.

[0063] In addition, the trimming post 61 can be detachably mounted on the first rotating shaft 62, and the trimming disc 71 can be detachably mounted on the output end of the reversing assembly 74, so as to facilitate the replacement of the easily-worn trimming post 61 and the trimming disc 71, or the replacement of the corresponding trimming post 61 and the trimming disc 71 when processing bearing covers of different sizes.

[0064] Specifically, referring to Figure 3 , the first rotating shaft 62 is fixedly connected with a horizontally arranged mounting plate 63 and a T-shaped strip 621 arranged in an axial direction of the first rotating shaft 62, and the trimming post 61 is provided with an avoiding groove 612 in the middle of the flat surface of the trimming post 61 for embedding the first rotating shaft 62, and the avoiding groove 612 is provided with a T-shaped groove 613 matched with the T-shaped strip 621, and the mounting plate 63 is provided with a first fixing member for fixing the top of the trimming post 61, and the first fixing member can be a bolt penetrating through the mounting plate 63 and being threadedly connected with the top end of the trimming post 61, or the first fixing member can be two permanent magnets arranged on the mounting plate 63 and the top end of the trimming post 61 and magnetically attracted to each other.

[0065] Therefore, the lower end of the first rotating shaft 62 is inserted into the avoiding groove 612 of the trimming post 61 from top to bottom, and the T-shaped strip 621 on the first rotating shaft 62 is embedded into the T-shaped groove 613 on the trimming post 61, so that the first rotating shaft 62 can stably drive the trimming post 61 to rotate when the first rotating shaft 62 rotates; when the trimming post 61 moves up to be attached to the mounting plate 63, the trimming post 61 is fixed to the mounting plate 63 through the first fixing member, so as to avoid the trimming post 61 from falling off, and the installation and replacement of the trimming post 61 can be facilitated.

[0066] Specifically, referring to Figure 4The output end of the reversing assembly 74 is fixedly connected with a mounting disc 75, a plurality of concentric circular arc grooves 751 are formed in the mounting disc 75, a positioning arc strip 711 is fixedly connected to the inner arc side of the trimming disc 71 and is embeddedly matched with the concentric circular arc grooves 751, and the mounting disc 75 is provided with a second fixing member for fixing the trimming disc 71. The second fixing member can be a bolt which penetrates the trimming disc 71 and is threadedly connected with the mounting disc 75.

[0067] Thus, the trimming disc 71 is attached to one side of the mounting disc 75, and the positioning arc strip 711 is embedded in one of the corresponding concentric circular arc grooves 751 of the mounting disc 75, so that the coaxiality of the trimming disc 71 and the mounting disc 75 can be ensured, and then the second fixing member is used to fix the trimming disc 71, so that the installation and replacement of the trimming disc 71 can be facilitated.

[0068] Further, in order to avoid that the chips removed during the trimming operation of the bearing cover fall into the mounting groove 91 and affect the trimming effect of the other mounting surface 92.

[0069] In another embodiment, referring to Figure 4 , a rotary joint 752 which is in communication with external compressed air is mounted at the shaft center of the mounting disc 75, the fixed end of the rotary joint 752 is fixedly connected with the support 73, the output end is connected with the mounting disc 75, the mounting disc 75 is fixedly connected with a gas nozzle 753 which is arranged along the radial direction of the mounting disc 75, the gas nozzle 753 is in communication with the output end of the rotary joint 752 through an air pipe 754, and the gas nozzle 753 is arranged at the end close to the trimming disc 71 and facing the rotating direction of the trimming disc 71.

[0070] Thus, when the mounting disc 75 drives the trimming disc 71 to rotate to trim the inner arc surface of the mounting groove 91 of the bearing cover, the gas nozzle 753 synchronously sprays air flow to blow the inner arc surface of the mounting groove 91, the chips in the mounting groove 91 can be blown to the mounting surface 92, and the chips can be swept away by the inner concave arc surface 611 arranged on the trimming column 61, so that the secondary cleaning process after the trimming operation can be omitted.

[0071] In addition, referring to Figure 1 , Figure 2 and Figure 5 , the above-mentioned switching mechanism comprises:

[0072] The first square shaft 32 is arranged axially along the first transmission shaft 31 and passes through the center of the rotating disc 21, and the first transmission shaft 31 is provided with a first square hole 311 at the end close to the first square shaft 32, which is adapted to the insertion of the first square shaft 32. The first square shaft 32 is elastically arranged radially in the rotating disc 21, specifically, the middle part of the first square shaft 32 close to both ends is fixedly connected with a guide ring 81, and the rotating disc 21 is provided with a guide hole 82 for the sliding of the guide ring 81. The guide hole 82 is fixedly connected with a limiting ring 83 on the hole wall between the two guide rings 81, and a spring 84 is arranged outside the first square shaft 32 between the limiting ring 83 and the guide ring 81 away from the first transmission shaft 31, and the spring 84 is rotationally connected with the guide ring 81. In the initial state, there is a gap between the first square shaft 32 and the two ends of the first transmission shaft 31, and the other end of the first square shaft 32 extends out of the rotating disc 21.

[0073] The second square shaft 42 is arranged axially along the second transmission shaft 41 and passes through the center of the rotating disc 21, and the second transmission shaft 41 is provided with a second square hole 411 at the end, which is adapted to the insertion of the second square shaft 42. The second square shaft 42 is elastically arranged radially in the rotating disc 21; specifically, the elastic structure of the second square shaft 42 on the rotating disc 21 is similar to that of the first square shaft 32 on the rotating disc 21, and is also provided with the above-mentioned guide ring 81, limiting ring 83 and spring 84, etc., and the two guide holes 82 are connected in communication at the center of the rotating disc 21. In the initial state, there is a gap between the second square shaft 42 and the two ends of the second transmission shaft 41, and the other end of the second square shaft 42 extends out of the rotating disc 21.

[0074] In the specific arrangement, in order to further reduce the mutual interference of the milling operation and the trimming operation, mainly referring to the mutual interference of the milling cutter 11 and the trimming column 61 and the trimming disc 71, in this embodiment, the included angle between the first transmission shaft 31 and the second transmission shaft 41 is 90°, or it can also be an included angle of other angles, such as 120°, etc. It also needs to be clear that when the spring 84 is not pressed, the gap between the first square shaft 32 and the first transmission shaft 31 is greater than the diagonal length of the cross section of the second square shaft 42, and the gap between the second square shaft 42 and the second transmission shaft 41 is greater than the diagonal length of the cross section of the first square shaft 32, so that when the power of the power assembly 22 is switched to the first transmission shaft 31 or the second transmission shaft 41, mutual interference does not occur.

[0075] Furthermore, the output end of the power assembly 22 is provided with a power shaft 23, the lower end of the power shaft 23 is provided with a third square hole 231 adapted to the insertion of the first square shaft 32 and the second square shaft 42, and the base 2 is fixedly connected with an arc plate 24 arranged around the rotating disc 21, and the arc plate 24 is provided with a through hole 241 in communication with the third square hole 231 at the arc top.

[0076] When the first shaft 32 or the second shaft 42 slides into the third hole 231 under the guidance of the arc plate 24 on the inner arc side, the other end of the first shaft 32 or the second shaft 42 is inserted into the corresponding first hole 311 or the second hole 411, and specifically, the depth of the first hole 311 and the second hole 411 is greater than the depth of the third hole 231.

[0077] The base 2 is provided with a rotating driving member for driving the rotating disc 21 to rotate about the axis in the rotating disc 21. The rotating driving member can be a rotating cylinder, or a gear, a gear ring, etc. meshing transmission structure, which is a conventional technical means and will not be described here.

[0078] Therefore, when it is required to output power to the first transmission shaft 31, the rotating driving member drives the rotating disc 21 to rotate on the base 2, so that the first transmission shaft 31 and the first shaft 32 are aligned with the power shaft 23. In this process, the end of the first shaft 32 extending out of the rotating disc 21 is pushed into the corresponding guide hole 82 on the inner arc side of the arc plate 24, and the spring 84 is compressed to deform. The end of the first shaft 32 close to the first transmission shaft 31 passes through the gap between the second shaft 42 and the second transmission shaft 41 and extends into the first hole 311 on the first transmission shaft 31. At this time, the first shaft 32 can rotate with the first transmission shaft 31. When the rotating disc 21 rotates to align the first shaft 32 with the perforation 241 on the arc plate 24, the upper end of the first shaft 32 passes through the perforation 241 and extends into the third hole 231 of the power shaft 23 under the action of the deformation force of the spring 84, so that the first shaft 32 rotates with the power shaft 23. At this time, the lower end of the first shaft 32 is still inserted into the first hole 311 of the first transmission shaft 31. Therefore, when the power assembly 22 drives the power shaft 23 to rotate, the first transmission shaft 31 can be driven to rotate on the rotating disc 21 by means of the first shaft 32, thereby driving the face milling cutter 11 to rotate for face milling work.

[0079] Similarly, when it is required to perform edge trimming work, the first shaft 32 is actuated to disengage from the third hole 231 and the perforation 241, and the rotating driving member drives the rotating disc 21 to rotate on the base 2, so that the second transmission shaft 41 and the second shaft 42 are aligned with the power shaft 23. The upper end of the second shaft 42 is inserted into the third hole 231 and the lower end is inserted into the second hole 411, so as to realize the synchronous rotation of the power shaft 23, the second shaft 42 and the second transmission shaft 41. Therefore, when the power assembly 22 drives the power shaft 23 to rotate, the second transmission shaft 41 can be driven to rotate, thereby synchronously rotating the edge trimming column 61 and the edge trimming disc 71 to perform edge trimming work.

[0080] Therefore, the power assembly 22 can conveniently switch the power of the first transmission shaft 31 and the second transmission shaft 41, and the milling cutter 11 and the trimming post 61 and the trimming disc 71 do not interfere with each other during operation, thereby ensuring the machining quality of the automobile bearing cover.

[0081] The embodiment of the application discloses a milling surface machining process for an automobile bearing cover. Figure 1 which comprises the following steps:

[0082] S1. The bearing cover to be machined is fixed through the clamping tool 12, the moving mechanism 13 is controlled to work according to a preset program, and the first transmission shaft 31 is driven to rotate by the power assembly 22, so that the milling cutter 11 mills the surface of the bearing cover to be machined;

[0083] S2. After the milling surface machining is completed, the rotary disc 21 is rotated, the power of the power assembly 22 is switched and transmitted to the second transmission shaft 41 through the switching mechanism, the trimming post 61 and the trimming disc 71 are synchronously driven to rotate through the transmission mechanism, the trimming disc 71 is used to trim the inner arc surface of the bearing cover mounting groove 91, the trimming post 61 is used to trim the bearing cover mounting surface 92 at the same time, and the trimming disc 71 and the trimming post 61 do not interfere with each other during the rotation, so that the inner arc surface of the bearing cover mounting groove 91 and the bearing cover mounting surface 92 are trimmed;

[0084] S3. The moving mechanism 13 is controlled to work along a path, so that the trimming disc 71 moves axially along the bearing cover mounting groove 91, and the trimming disc 71 is used to trim the intersection of the inner arc surface of the bearing cover mounting groove 91 and the mounting surface 92 on one side; then the base 2 is controlled to rotate 180° through the moving mechanism 13, so that the trimming disc 71 continues to align with the bearing cover mounting groove 91, the trimming post 61 aligns with the mounting surface 92 on the other side, the moving mechanism 13 is controlled to work along a path, so that the trimming disc 71 moves axially along the bearing cover mounting groove 91, and the trimming disc 71 is used to trim the intersection of the inner arc surface of the bearing cover mounting groove 91 and the mounting surface 92 on the other side;

[0085] S4. After trimming is completed, the base 2 is lifted through the moving mechanism 13, the bearing cover is taken off from the clamping tool 12 and a new bearing cover to be machined is put on, the rotary disc 21 is reversely rotated, the power of the power assembly 22 is switched and transmitted to the first transmission shaft 31 through the switching mechanism, and steps S1-S3 are repeated.

[0086] The implementation principle of the embodiment of the application is as follows:

[0087] When the milling face processing of the bearing cover is performed, the power of the power assembly 22 is switched to the first transmission shaft 31 through the switching mechanism, the first transmission shaft 31 rotates to drive the milling face cutter 11 to rotate at high speed, and the milling face processing of the two processing faces of the bearing cover and the inner arc face of the mounting groove 91 can be realized. After the milling face processing is completed, the power of the power assembly 22 is switched to the second transmission shaft 41 through the switching mechanism, the second transmission shaft 41 rotates at high speed to drive the trimming column 61 and the trimming disc 71 to rotate synchronously at the same angular velocity through the transmission mechanism, so that the trimming column 61 can trim and smooth the mounting face 92 of one side of the bearing cover when rotating at high speed, and the trimming disc 71 also trims the inner arc face of the mounting groove 91 of the bearing cover when rotating at high speed; moreover, since the arc side of the trimming disc 71 is away from the junction of the mounting face 92 of the bearing cover and the inner arc face of the mounting groove 91 during the process that the arc side of the trimming column 61 sweeps through the junction, the trimming column 61 and the trimming disc 71 do not interfere with each other when rotating at high speed, and the junction of the mounting face 92 of the bearing cover and the inner arc face of the mounting groove 91 can be alternately trimmed, which can effectively ensure the flatness of the junction of the mounting face 92 of the bearing cover and the inner arc face of the mounting groove 91 after the milling face processing, and helps to improve the milling face quality.

[0088] When the trimming of one mounting face 92 of the bearing cover is completed, the base 2 is only needed to be rotated by 180° by controlling the moving mechanism 13, and the junction of the other mounting face 92 and the inner arc face of the mounting groove 91 can be alternately trimmed, so that the trimming operation is more convenient, and the milling face efficiency of the bearing cover can be improved without positioning again after the milling face operation is completed.

[0089] Unless otherwise defined, technical terms or scientific terms used in the present application shall have the common meaning understood by a person with ordinary skill in the art to which the present application belongs. The terms "first", "second", "third" and the like used in the specification and claims of the present application do not represent any order, number or importance, but are only used to distinguish different components. The terms "one" or "a" and the like do not represent a number limitation, but represent the existence of at least one. The terms "including", "containing" and the like mean that the elements or objects appearing before "including" or "containing" cover the elements or objects listed after "including" or "containing" and their equivalents, and do not exclude other elements or objects. The terms "upper", "lower", "left", "right" and the like are only used to represent relative positional relationships, and when the absolute positions of the described objects are changed, the relative positional relationships may also be changed accordingly.

[0090] The above are preferred embodiments of the present application, which do not limit the protection scope of the present application, therefore: any equivalent changes made on the structure, shape, principle of the present application shall be covered within the protection scope of the present application.

Claims

1. An automobile bearing cap face milling device, comprising a machine tool (1), a face milling tool (11), a clamping tool (12) and a moving mechanism (13) for driving the face milling tool (11) to move, characterized in that, The output end of the moving mechanism (13) is provided with a base (2), the base (2) is provided with a rotary disc (21) and a power assembly (22), the rotary disc (21) is provided with a first transmission shaft (31) and a second transmission shaft (41) arranged at an included angle, a face milling cutter (11) is arranged on the first transmission shaft (31), and a switching mechanism for switching and transmitting power of the power assembly (22) to the first transmission shaft (31) or the second transmission shaft (41) is arranged between the base (2) and the rotary disc (21); The rotary disc (21) is provided with a trimming seat (5), the trimming seat (5) is provided with a semi-cylindrical trimming column (61) and a semi-disc trimming disc (71) arranged in rotation, the trimming seat (5) is provided with a transmission mechanism for transmitting the rotary power of the second transmission shaft (41) to the trimming column (61) and the trimming disc (71) at the same time, the rotary angular velocities of the trimming column (61) and the trimming disc (71) are the same, the rotary direction of the trimming disc (71) is from the lowest part to the highest part of the bearing cover mounting groove (91), and the circular arc side of the trimming disc (71) is away from the junction of the bearing cover mounting surface (92) and the inner arc surface of the mounting groove (91) in the process that the circular arc side of the trimming column (61) sweeps through the junction. The lower end surface of the trimming column (61) is used for trimming the bearing cover mounting surface (92), the trimming disc (71) is used for trimming the inner arc surface of the bearing cover mounting groove (91), the axis of the trimming column (61) is orthogonal to the axis of the trimming disc (71), and the outer diameter of the trimming disc (71) is the same as the diameter of the inner arc surface of the mounting groove (91).

2. The device for milling the surface of an automobile bearing cover according to claim 1, wherein, The outer diameter of the trimming column (61) is greater than the width of the bearing cover mounting surface (92).

3. The device for milling surface of automobile bearing cover according to claim 1, characterized in that, The flat surface of the trimming column (61) is provided with an inner concave arc surface (611) on the side facing the rotary direction, the inner concave arc surface (611) extends upward along the axial direction of the trimming column (61) and gradually converges.

4. The device for milling the surface of an automobile bearing cover according to any one of claims 1-3, characterized in that, The transmission mechanism comprises: A first rotating shaft (62) is rotatably arranged on the trimming seat (5), the trimming column (61) is coaxially connected with the first rotating shaft (62); A second rotating shaft (72) is rotatably arranged on the trimming seat (5), the second rotating shaft (72) is parallel to the first rotating shaft (62) and is connected with the first rotating shaft (62) through same motion transmission; and A support (73) is fixedly connected to the trimming seat (5), a reversing assembly (74) for horizontally reversing the power output of the lower end of the second rotating shaft (72) by 90 degrees is arranged at the bottom end of the support (73), and the trimming disc (71) is arranged at the output end of the reversing assembly (74).

5. The apparatus for milling a surface of an automotive bearing cap of claim 4, wherein, The trimming column (61) can be detachably arranged on the first rotating shaft (62), and the trimming disc (71) can be detachably arranged at the output end of the reversing assembly (74).

6. The device for milling the surface of an automobile bearing cap according to claim 5, wherein The first rotating shaft (62) is fixedly connected with a horizontally arranged mounting plate (63) and a T-shaped strip (621) arranged along the axial direction of the mounting plate (63), the trimming column (61) is provided with an avoiding groove (612) in the middle of the flat surface of the trimming column (61) for embedding the first rotating shaft (62), and the avoiding groove (612) is provided with a T-shaped groove (613) adapted to the T-shaped strip (621), and the mounting plate (63) is provided with a first fixing member for fixing the top of the trimming column (61).

7. The device for milling the surface of an automobile bearing cap according to claim 5, wherein The output end of the reversing assembly (74) is fixedly connected with a mounting disc (75), the mounting disc (75) is provided with a plurality of concentric circular arc grooves (751), the inner arc side of the trimming disc (71) is fixedly connected with a positioning arc strip (711) adapted to the concentric circular arc grooves (751), and the mounting disc (75) is provided with a second fixing member for fixing the trimming disc (71).

8. The device for milling the surface of an automobile bearing cap according to claim 7, characterized in that, The mounting disc (75) is provided with a rotating joint (752) in communication with external compressed air at the axial center of the mounting disc (75), the mounting disc (75) is fixedly connected with a gas nozzle (753) arranged along the radial direction of the mounting disc (75), the gas nozzle (753) is in communication with the output end of the rotating joint (752), and the gas nozzle (753) is arranged at one end close to the trimming disc (71) and facing the rotating direction of the trimming disc (71).

9. The device for milling surface of automobile bearing cover according to claim 1, characterized in that, The switching mechanism comprises: A first square shaft (32) is arranged along the axial direction of the first transmission shaft (31) and passes through the center of the rotating disc (21), the end of the first transmission shaft (31) is provided with a first square hole (311) adapted to the first square shaft (32), the first square shaft (32) is elastically arranged on the rotating disc (21) along the radial direction of the rotating disc (21), and in the initial state, the first square shaft (32) has a gap between the two ends of the first transmission shaft (31), and the other end of the first square shaft (32) extends out of the rotating disc (21); A second square shaft (42) is arranged along the axial direction of the second transmission shaft (41) and passes through the center of the rotating disc (21), the end of the second transmission shaft (41) is provided with a second square hole (411) adapted to the second square shaft (42), the second square shaft (42) is elastically arranged on the rotating disc (21) along the radial direction of the rotating disc (21), and in the initial state, the second square shaft (42) has a gap between the two ends of the second transmission shaft (41), and the other end of the second square shaft (42) extends out of the rotating disc (21); The output end of the power assembly (22) is provided with a power shaft (23), the lower end of the power shaft (23) is provided with a third square hole (231) adapted to the first square shaft (32) and the second square shaft (42), and the base (2) is fixedly connected with an arc plate (24) arranged around the rotating disc (21), the arc plate (24) is provided with a through hole (241) in the top of the arc plate (24) and in communication with the third square hole (231); When the first square shaft (32) or the second square shaft (42) slides into the third square hole (231) under the guidance of the inner arc side of the arc plate (24), the other end of the first square shaft (32) or the second square shaft (42) is inserted into the corresponding first square hole (311) or the second square hole (411).

10. A process for milling a surface of an automotive bearing cap based on the device for milling a surface of an automotive bearing cap according to any one of claims 1 to 9, characterized in that, The method comprises the following steps: S1. The bearing cover to be machined is fixed through the clamping tool (12), the moving mechanism (13) is controlled to work in a preset program, and the first transmission shaft (31) is driven to rotate by the power assembly (22), so that the bearing cover to be machined is milled by the milling cutter (11); S2. After the milling is completed, the rotary disc (21) is rotated, the power of the power assembly (22) is switched and transmitted to the second transmission shaft (41) through the switching mechanism, the trimming column (61) and the trimming disc (71) are synchronously rotated by the transmission mechanism, the trimming disc (71) is trimmed on the inner arc surface of the bearing cover installation groove (91), the trimming column (61) is trimmed on the bearing cover installation surface (92) at the same time, and the trimming disc (71) and the trimming column (61) do not interfere with each other during rotation, so that the bearing cover installation groove (91) and the bearing cover installation surface (92) are trimmed; S3. The moving mechanism (13) is controlled to work along a path, so that the trimming disc (71) moves axially along the bearing cover installation groove (91), and the bearing cover processing surface is completely trimmed; S4. After trimming is completed, the base (2) is lifted by the moving mechanism (13), the bearing cover is taken off from the clamping tool (12) and a new bearing cover to be machined is replaced, the rotary disc (21) is reversely rotated, the power of the power assembly (22) is switched and transmitted to the first transmission shaft (31) through the switching mechanism, and steps S1-S3 are repeated.

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