A machining center for an automobile engine camshaft bracket and a manufacturing method thereof

Abstract

The present invention discloses a machining center for an automotive engine camshaft bracket and a manufacturing method thereof, including a machining fixture for clamping the engine camshaft bracket and a press-fitting device. The machining fixture includes a first workbench, a second workbench perpendicular to the first workbench, and an anti-error system disposed within the first workbench and the second workbench. The anti-error system includes an anti-error air circuit, a leakage sensor for detecting the airtightness of the anti-error air circuit, and a control center connected to the leakage sensor. The control center detects the airtightness of the anti-error air circuit through the leakage sensor. The press-fitting device includes a press-fitting main body, a pin, and an anti-error pointer. The pin is installed on the press-fitting main body, and the anti-error pointer is located below the pin. The machining center for the automotive engine camshaft bracket and the manufacturing method thereof have the advantages of correctly clamping the engine camshaft bracket and correctly press-fitting the pin.

Description

Technical Field

[0001] The present invention relates to the field of manufacturing engine brackets, and particularly to a machining center for an automotive engine camshaft bracket and a manufacturing method thereof. Background Art

[0002] Currently, the machining accuracy requirements for automotive engine camshaft brackets are getting higher and higher. Under the condition of meeting the machining accuracy, improving efficiency is an urgent problem to be solved. Moreover, due to the small size of engine camshaft bracket products and poor fixture stability during one-time clamping, it is easy to cause the product to be clamped and positioned incorrectly. In addition, when pressing pins for engine camshaft bracket products, there is a risk of mixing components with the same outer diameter but different lengths. These deficiencies need to be solved by the production line.

[0003] Currently, the traditional machining method for automotive engine camshaft brackets is to use a set of fixtures to machine one direction surface and holes. Therefore, machining automotive engine camshaft brackets requires two sets of fixtures, two machining centers, and the operator needs to run back and forth between the two sets of fixtures, resulting in low efficiency. And because of the small size of engine camshaft bracket products and poor fixture stability during one-time clamping, manual perception is relied on for clamping during clamping. In the case of mass production, there is a risk of incomplete clamping.

[0004] Therefore, in view of the deficiencies of the prior art, a machining center for an automotive engine camshaft bracket and a manufacturing method thereof are provided. Summary of the Invention

[0005] The present invention provides a machining center for an automotive engine camshaft bracket and a manufacturing method thereof, aiming to solve the problems of incomplete clamping of the engine camshaft bracket and mis-pressing of pins.

[0006] The present invention adopts the following technical solutions:

[0007] A machining center for an automotive engine camshaft bracket, comprising a machining fixture for clamping the engine camshaft bracket and a press-fitting device. The machining fixture includes a first workbench, a second workbench vertically arranged with the first workbench, and an anti-mistake system arranged in the first workbench and the second workbench;

[0008] The first workbench includes a machining cross plate and a first clamping assembly arranged on the machining cross plate. The camshaft bracket is clamped on the first clamping assembly and machined along a first machining direction;

[0009] The second workbench includes a machining vertical plate and a second clamping assembly arranged on the machining vertical plate. The camshaft bracket is clamped on the second clamping assembly and machined along a second machining direction;

[0010] The error-proofing system includes an error-proofing air circuit, a leakage sensor for detecting the airtightness of the error-proofing air circuit, and a control center connected to the leakage sensor. The control center detects the airtightness of the error-proofing air circuit through the leakage sensor. The error-proofing air circuit includes a first air circuit grid and a second air circuit grid respectively arranged inside the first workbench and the second workbench;

[0011] The press-fitting device includes a press-fitting main body, a pin, and an error-proofing pointer. The pin is installed on the press-fitting main body, and the error-proofing pointer is located below the pin.

[0012] Further, as an improvement of the technical solution of the present invention, the first clamping assembly includes a plurality of first positioning pin seats, first positioning pins assembled on the first positioning pin seats, and a first pressing member for pressing the camshaft bracket;

[0013] The first pressing member includes a first pressing rod and a first air cylinder for controlling the first pressing rod. The camshaft bracket is fixed to the two first positioning pins through the first pressing rod, and the first air cylinder adjusts the pressure on the camshaft bracket through the first pressing rod.

[0014] Further, as an improvement of the technical solution of the present invention, the first workbench is further provided with a lower cross plate fixed on the workbench of the machining center, and a plurality of columns connecting the machining cross plate and the lower cross plate. The lower cross plate is arranged parallel to the machining cross plate, and the first air cylinder is arranged between the machining cross plate and the lower cross plate.

[0015] Further, as an improvement of the technical solution of the present invention, the first air circuit grid includes a first horizontal through hole penetrating the machining cross plate in the X-axis direction, a plurality of first air circuit holes, and a first through hole connecting the first horizontal through hole and the first air circuit holes. The first through hole corresponds to the two first air circuit holes;

[0016] One end of the first horizontal through hole is provided with a first interface, and the first interface is connected to the leakage sensor. The end far from the first interface is blocked by a blocking member.

[0017] Further, as an improvement of the technical solution of the present invention, the first positioning pin seat is provided with two first detection holes, and the first horizontal through hole, the first air circuit holes, the first through hole, and the first detection holes form an L1 air circuit channel.

[0018] Further, as an improvement of the technical solution of the present invention, the second clamping assembly includes a plurality of second positioning pin seats, second positioning pins assembled on the second positioning pin seats, and a second pressing member for fixing the camshaft bracket;

[0019] The second pressing member includes a second pressing rod and a second cylinder controlling the second pressing rod. The camshaft bracket is fixed to the two second positioning pins through the two second pressing rods. The second cylinder adjusts the pressure on the camshaft bracket through the second pressing rod.

[0020] As a further improvement to the technical solution of the present invention, the second gas path grid includes a second transverse through hole penetrating the processing horizontal plate along the X-axis direction, a plurality of second gas path holes, and a second through hole connecting the second transverse through hole and the second gas path hole, and the second through hole corresponds to the second gas path hole one by one;

[0021] A second interface is provided at one end of the second transverse hole, the second interface is connected to the leakage sensor, and an end away from the second interface is blocked by a blocking member.

[0022] As a further improvement of the technical solution of the present invention, the second positioning pin seat is provided with two second detection holes, and the second transverse hole, the second air path hole, the second through hole and the second detection hole constitute the L2 air path channel.

[0023] As a further improvement to the technical solution of the present invention, the error-proofing system further includes an air source for supplying air to the error-proofing air circuit, the air source being in communication with the error-proofing air circuit;

[0024] The gas source is connected to the leakage sensor to form an L4 gas path.

[0025] A method for manufacturing a camshaft bracket for an automobile engine is suitable for the machining center of the above-mentioned camshaft bracket for an automobile engine. The camshaft bracket includes an abutment surface, a large mating plane arranged away from the abutment surface, an axial hole adapted to the camshaft, axial hole end surfaces arranged at both ends of the axial hole, and two φ9 pin holes.

[0026] The steps include: step S1, processing the camshaft bracket to be processed in a first processing direction;

[0027] Step S1.1, clamp the camshaft bracket to be processed onto the first clamping assembly with the large joint surface facing upward, using the two φ9 pin holes as rough positioning holes and the abutting surface as the rough positioning surface;

[0028] Step S1.2: Check the tightness of the first gas path grid using a leakage sensor;

[0029] Step S1.3, drill and ream a φ9 pin hole;

[0030] Step S1.4, rough and fine milling of the large joint plane;

[0031] Step S1.5, cleaning the camshaft bracket;

[0032] Step S2: Machine the camshaft bracket that has been machined in the first machining direction in the second machining direction;

[0033] Step S2.1: Clamp the camshaft bracket with the end face of the shaft hole facing up on the second clamping component after being machined in the first machining direction. The two φ9 pin holes serve as precise positioning holes, and the large mating plane serves as the precise positioning surface;

[0034] Step S2.2: Check the airtightness of the second air path grid through a leakage sensor;

[0035] Step S2.3: Rough and finish mill the end face of the shaft hole;

[0036] Step S2.4: Clean the camshaft bracket;

[0037] Step S3: Press two φ9 pins into the camshaft bracket;

[0038] Step S4: Conduct a full inspection;

[0039] Step S5: Package.

[0040] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0041] The machining center and its manufacturing method for the camshaft bracket of an automotive engine proposed by the present invention adopt a set of machining fixtures and a press-fitting device. The machining fixture includes a first workbench and a second workbench perpendicular to the first workbench, and can machine two direction faces and holes of the product simultaneously. The first workbench and the second workbench are also provided with an anti-misalignment system, which can prevent the camshaft bracket from being misaligned when being clamped by the machining fixture; when pressing pins into the camshaft bracket, the anti-misalignment pointer in the press-fitting device can prevent pins of different lengths from being mixed in. The machining center and its manufacturing method for the camshaft bracket of an automotive engine have the characteristics of correct clamping of the engine camshaft bracket and correct pressing of pins. Description of the Drawings

[0042] The following further elaborates on the technology of the present invention in detail in conjunction with the drawings and specific embodiments:

[0043] Figure 1 It is a top view of the machining fixture in the machining center for the camshaft bracket of an automotive engine;

[0044] Figure 2 It is a front view of the machining fixture in the machining center for the camshaft bracket of an automotive engine;

[0045] Figure 3 It is a front view of the machining center for the camshaft bracket of an automotive engine;

[0046] Figure 4 It is Figure 3 An enlarged schematic view of part A in

[0047] Figure 5 It is a schematic cross-sectional view of a camshaft bracket;

[0048] Figure 6 It is a top view of the camshaft bracket;

[0049] Figure 7 It is a front view of the first air passage grid in the machining center of an automotive engine camshaft bracket;

[0050] Figure 8 It is a sectional view of the first air passage grid in the machining center of an automotive engine camshaft bracket;

[0051] Figure 9 It is a front view of the second air passage grid in the machining center of an automotive engine camshaft bracket;

[0052] Figure 10 It is a sectional view of the second air passage grid in the machining center of an automotive engine camshaft bracket;

[0053] Figure 11 It is a schematic cross-sectional view of the first positioning pin seat / second positioning pin seat in the machining center of an automotive engine camshaft bracket;

[0054] Figure 12 It is a schematic diagram of the airtightness detection process in the machining center of an automotive engine camshaft bracket.

[0055] Reference numerals:

[0056] 1. First workbench; 11. Horizontal plate; 12. First clamping assembly; 121. First positioning pin seat; 1211. First detection hole; 122. First positioning pin; 123. First pressing member; 1231. First pressing rod; 1232. First cylinder; 13. First air passage grid; 131. First horizontal perforation; 1311. First interface; 132. First air passage hole; 133. First through hole; 14. Lower horizontal plate; 15. Column;

[0057] 2. Second workbench; 21. Vertical plate; 22. Second clamping assembly; 221. Second positioning pin seat; 2211. Second detection hole; 222. Second positioning pin; 223. Second pressing member; 2231. Second pressing rod; 2232. Second cylinder; 23. Second air passage grid; 231. Second horizontal perforation; 2311. Second interface; 232. Second air passage hole; 233. Second through hole;

[0058] 3. Anti-mistake system; 31. Anti-mistake air passage; 32. Leakage sensor; 33. Control center; 34. Air source; 4. Pressing main body; 5. Pin; 6. Anti-mistake pointer; 7. Camshaft bracket; 71. Contact surface; 72. Large joint plane; 73. Shaft hole; 74. Pin hole; 75. Shaft hole end face. Detailed implementation manners

[0059] The following will clearly and completely describe the concept, specific structure and technical effects of the present invention in combination with embodiments and the accompanying drawings to fully understand the purpose, solution and effects of the present invention. It should be noted that, without conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. The same reference numerals used in the drawings indicate the same or similar parts everywhere.

[0060] It should be noted that, unless otherwise specified, when a certain feature is referred to as "fixed" or "connected" to another feature, it can be directly fixed or connected to the other feature, or indirectly fixed or connected to the other feature. In addition, the up, down, left, right, etc. descriptions used in the present invention are only relative to the mutual positional relationship of the various components of the present invention in the accompanying drawings.

[0061] A machining center for an automotive engine camshaft bracket and its manufacturing method, referring to Figures 1 to 12 , includes a machining fixture and a pressing device;

[0062] The machining fixture is used to clamp the engine camshaft bracket 7. The machining fixture includes a first workbench 1, a second workbench 2 perpendicular to the first workbench 1, and an anti-misassembly system 3 arranged inside the first workbench 1 and the second workbench 2; the first workbench 1 includes a machining cross plate 11 and a first clamping assembly 12 arranged on the machining cross plate 11. The camshaft bracket 7 is clamped on the first clamping assembly 12 and machined along a first machining direction; the first machining direction is the Z-axis direction; the second workbench 2 includes a machining vertical plate 21 and a second clamping assembly 22 arranged on the machining vertical plate 21. The camshaft bracket 7 is clamped on the second clamping assembly 22 and machined along a second machining direction; the second machining direction is the Y-axis direction; the anti-misassembly system 3 includes an anti-misassembly air circuit 31, a leakage sensor 32 for detecting the airtightness of the anti-misassembly air circuit 31, and a control center 33 connected to the leakage sensor 32. The control center 33 detects the airtightness of the anti-misassembly air circuit 31 through the leakage sensor 32. The anti-misassembly air circuit 31 includes a first air circuit grid 13 and a second air circuit grid 23 respectively arranged inside the first workbench 1 and the second workbench 2; the pressing device includes a pressing main body 4, a pin 5 and an anti-misassembly pointer 6. The pin 5 is installed on the pressing main body 4, and the anti-misassembly pointer 6 is located below the pin 5; referring to Figure 1 As shown, the X-axis direction is set along the length direction of the machining cross plate 11, the Y-axis direction is set along the width direction of the machining cross plate 11, and thus, the Z-axis direction is set perpendicular to the machining cross plate 11.

[0063] Among them, a processing fixture and a press-fitting device are adopted. The processing fixture includes a first workbench 1 and a second workbench 2 perpendicular to the first workbench 1, which can process two direction surfaces and holes of the product simultaneously. The first workbench 1 and the second workbench 2 are also provided with an anti-mistake system 3, which can prevent the camshaft bracket 7 from being misaligned when being clamped by the processing fixture; when pressing the pin into the camshaft bracket 7, the anti-mistake pointer 6 in the press-fitting device can prevent pins 5 of different lengths from being mixed in. The processing center for the camshaft bracket 7 of the automobile engine and its manufacturing method have the characteristics that the engine camshaft bracket 7 is clamped in place and the pin 5 is correctly pressed in.

[0064] In one embodiment, the first clamping assembly 12 includes four first positioning pin seats 121, first positioning pins 122 assembled on the first positioning pin seats 121, and a first pressing member 123 for pressing the camshaft bracket 7; the first pressing member 123 includes a first pressing rod 1231 and a first air cylinder 1232 for controlling the first pressing rod 1231. During installation, the camshaft bracket 7 is fixed by the first pressing rod 1231 and the two first positioning pins 122. At this time, the two ends of the first pressing rod 1231 press the camshaft bracket 7 respectively and then machining is carried out. The first air cylinder 1232 adjusts the pressure on the camshaft bracket 7 through the first pressing rod 1231.

[0065] In one embodiment, the first workbench 1 is further provided with a lower cross plate 1411 fixed on the workbench of the processing center and several columns 15 connecting the processing cross plate 11 and the lower cross plate 1411. The lower cross plate 1411 is arranged parallel to the processing cross plate 11, and the first air cylinder 1232 is arranged between the processing cross plate 11 and the lower cross plate 1411; the thickness of the lower cross plate 1411 is 25 mm, and a workbench fixing groove is opened. The two vertical edges in front of the lower cross plate 1411 are designed as the X and Y coordinate benchmarks for fixture measurement and can be used as the adjustment benchmarks for on-site fixture adjustment. The roughness requirement is Rz6.3. The installation bottom surface of the lower cross plate 1411 is designed as the Z coordinate measurement benchmark, and the flatness requirement is 0.01. This surface ensures a roughness of Rz1.6; the processing cross plate 11 is connected and fixed to the lower cross plate 1411 through 4 columns 15, and it is necessary to ensure that the parallelism between the upper end surface of the processing cross plate 11 and the lower end surface of the lower cross plate 1411 after assembly is less than 0.015.

[0066] In one embodiment, the first gas path grid 13 includes a φ6 first transverse hole 131 that passes through the processing horizontal plate 11 along the X-axis direction, four gas path holes, and a φ6 first through hole 133 that connects the φ6 first transverse hole 131 and the φ3 first gas path hole 132, and the φ6 first through hole 133 corresponds to two φ3 first gas path holes 132; the first positioning pin 122 seat 121 is provided with two φ2×φ0.6 first detection holes 1211, and the φ6 first transverse hole 131, the φ3 first gas path hole 132, the φ6 first through hole 133, and the φ2×φ0.6 first detection hole 1211 constitute the L1 gas path channel. The L1 gas path channel, the leakage sensor 32, and the control center 33 form a first detection system. One end of the first transverse hole 131 is provided with a first interface 1311, which is connected to the leakage sensor 32, and the end away from the first interface 1311 is blocked by a blocking member. The first interface 1311 is a ZG1 / 8 interface. After the machining fixture is clamped, the first interface 1311 is used to connect the leakage sensor 32 to the RC1 / 8 interface, and the end away from the first interface 1311 is sealed with a sealing screw; when the camshaft bracket 7 is not biased, the abutment surface 71 of the camshaft bracket 7 will seal the two φ2×φ0.6 first detection holes 1211, and set a leakage value A≤100Pa on the leakage sensing gas. The leakage value is within the set range, and the control center 33 fails to receive the signal of the leakage sensor 32, and is judged to be in an OK state. The control center 33 does not issue an alarm, and the machining center can now process the camshaft bracket 7; when the camshaft bracket 7 is not clamped in place or is biased, the abutment surface 71 of the camshaft bracket 7 fails to completely seal the two φ2×φ0.6 first detection holes 1211, and the leakage value exceeds the set range. The control center 33 receives the signal of the leakage sensor 32, and is judged to be in an NG state. The control center 33 issues an alarm, and the machining center cannot process the camshaft bracket 7.

[0067] In one embodiment, the second clamping assembly 22, four second locating pins 222 seats 221, second locating pins 222 assembled on the second locating pins 222 seats 221 and three second pressing members 223 for fixing the camshaft bracket 7, the four second locating pins 222 seats 221 are arranged side by side, and the two camshafts are fixed between the three second pressing members 223 at intervals; the second pressing member 223 includes a second pressing rod 2231 and a second cylinder 2232 for controlling the second pressing rod 2231, the second pressing rods 2231 of the second pressing members 223 arranged on both sides press one end of the two camshaft brackets 7 respectively, and the two ends of the second pressing rod 2231 of the second pressing member 223 arranged in the middle press the other end of the two camshaft brackets 7 respectively. During installation, the camshaft bracket 7 is fixed to the two second locating pins 222 by the two second pressing rods 2231 and then processed, and the second cylinder 2232 adjusts the pressure on the camshaft bracket 7 through the second pressing rod 2231.

[0068] In one embodiment, the second gas path grid 23 includes a φ6 second transverse hole 231 that passes through the processing horizontal plate 11 along the X-axis direction, four φ3 second gas path holes 232, and a φ6 second through hole 233 that connects the φ6 second transverse hole 231 and the φ3 second gas path holes 232, and the φ6 second through hole 233 corresponds one-to-one with the φ3 second gas path holes 232; the second positioning pin 222 seat 221 is provided with two φ2×φ0.6 second detection holes 2211, and the φ6 second transverse hole 231, the φ3 second gas path holes 232, the φ6 second through hole 233 and the φ2×φ0.6 second detection hole 2211 constitute the L2 gas path channel, and the L2 gas path channel, the leakage sensor 32 and the control center 33 form a second detection system. One end of the second transverse hole 231 is provided with a second interface 2311, the second interface 2311 is connected to the leakage sensor 32, and the end away from the second interface 2311 is blocked by a blocking member. The second interface 2311 is a ZG1 / 8 interface. After the machining fixture is clamped, the second interface 2311 is used to connect the leakage sensor 32 to the RC1 / 8 interface, and the end away from the second interface 2311 is sealed with a sealing screw; when the camshaft bracket 7 is not offset, the large bonding surface 72 of the camshaft bracket 7 will seal the two φ2×φ0.6 second detection holes 2211, and set a leakage value A≤100Pa on the leakage sensing gas. The leakage value is within the set range. The control center 33 fails to receive the signal of the leakage sensor 32 and is judged to be in an OK state. The control center 33 does not issue an alarm. At this time, the machining center can process the camshaft bracket 7; when the camshaft bracket 7 is not clamped in place or is offset, the large bonding surface 72 of the camshaft bracket 7 fails to completely seal the two φ2×φ0.6 second detection holes 2211. The leakage value exceeds the set range. The control center 33 receives the signal of the leakage sensor 32 and is judged to be in an NG state. The control center 33 issues an alarm. At this time, the machining center cannot process the camshaft bracket 7.

[0069] In one embodiment, according to the adoption requirements, the first detection hole 1211 and the second detection hole 2211 must be ≤φ1.5. Taking into account that the abutment surface 71 and the large bonding plane 72 of the camshaft bracket 7 are relatively small and need to match the detection range of the leakage detector, after testing, this detection hole is set to φ0.6. In order to ensure the stability of the detected air flow, the depth of the φ0.6 detection hole is set to 2mm; the first air path hole 132 and the second air path hole 232 are both provided with a φ20 countersunk hole for installing an O-ring, and a φ16 hole for installing a positioning pin seat.

[0070] In one embodiment, the first interface 1311 and the second interface 2311 are connected through a tee interface to form an L3 gas path channel. The L gas path channel, two leakage sensors 32, and the control center 33 form a third detection system. The anti-error system 3 further includes a gas source 34 that supplies gas to the anti-error gas path 31, and the gas source 34 is connected to the anti-error gas path 31. The gas source 34 is connected to the leakage sensor 32 to form an L4 gas path channel, and the L4 gas path channel and the control center 33 form a fourth detection system. It can be seen that the L1 gas path channel, the L2 gas path channel, the L3 gas path channel, and the L4 gas path channel constitute the anti-error gas path 31, and the first detection system, the second detection system, the third detection system, and the fourth detection system are all independently controlled and constitute the anti-error system 3. <> <>

[0071] A manufacturing method of an automotive engine camshaft bracket 7, and a machining center for the automotive engine camshaft bracket 7 according to any one of the above. The camshaft bracket 7 includes a contact surface 71, a large joint plane 72 disposed opposite to the contact surface 71, a shaft hole 73 adapted to the camshaft, shaft hole end faces disposed at both ends of the shaft hole 73, and two φ9 pin holes 74. <> <>

[0072] It includes the following steps: <> <>

[0073] Step S1: Machine the camshaft bracket to be machined in the first machining direction. <> <>

[0074] Step S1.1: Clamp the camshaft bracket to be machined with the large joint plane facing up on the first clamping assembly. The two φ9 pin holes serve as rough positioning holes, and the contact surface serves as a rough positioning surface. <> <>

[0075] Step S1.2: Check the airtightness of the first air path grid through a leakage sensor. <> <>

[0076] Step S1.3: Drill and ream the φ9 pin holes. The size of the φ9 pin holes is Φ9(+0, 022 / 0)×Φ9(-0.03 / -0.05), the surface roughness is Rz12.5, the machining depth is 6.5±0.1, a PCD tool and a hydraulic tool holder are used, and the high-speed machining speed can be S6000, and the feed is F1500. <> <>

[0077] Step S1.4: Rough and finish mill the large joint plane. The surface roughness of the large joint plane is Rz6.3, the flatness is 0.05, the thickness dimension is 18.0±0.15, a special three-sided milling cutter is used for machining, and the speed can be S7000 and the feed can be F2000 for fast machining. <> <>

[0078] Step S1.5: Clean the camshaft bracket. <> <>

[0079] Step S2: Machine the camshaft bracket machined in the first machining direction in the second machining direction. <> <>

[0080] Step S2.1: Clamp the end face of the camshaft bracket shaft hole machined in the first machining direction upward on the second clamping assembly. The two φ9 pin holes serve as precise positioning holes, and the large mating plane serves as the precise positioning surface.

[0081] Step S2.2: Check the airtightness of the second air passage grid through a leakage sensor.

[0082] Step S2.3: Rough and finish mill the end face of the shaft hole. The machining thickness of the upper and lower end faces of the shaft hole is 21(0 / -0.05), the surface roughness is Rz12.5. Use a PCD blade with a specific angle, which can achieve a high-speed machining speed of S7000 and a feed rate of F2000, and can well ensure that the surface distance requirement is less than 0.05.

[0083] Step S2.4: Clean the camshaft bracket.

[0084] Step S3: Press two φ9 pins into the camshaft bracket. The length of the pins is 10mm. During on-site production, due to different vehicle models, pins with a diameter of φ9 and a length specification of 14mm are also used. If pins of different length specifications are mixed and cannot be identified, it will cause errors in pin pressing. There is a pointer-type induction anti-error system installed on the press-fitting fixture and equipment for the engine aluminum alloy bracket, which can prevent errors for pins with a length of 14mm. When a pin with a normal length of 10mm is installed on the fixture, the anti-error pointer will rotate through below the pin, and the system will determine it as OK. When a pin with a length of 14mm is mixed in, since the 14mm long pin is 4mm longer than the 10mm long pin. When the anti-error pointer rotates through, it will hit the 14mm long pin, and the anti-error pointer cannot pass through. At this time, the system alarms and determines it as NG, and pin pressing cannot be performed.

[0085] Step S4: Conduct a full inspection. 3) Use a special inspection fixture 2SV1.5-L1-7005 to check (there are a total of three inspection blocks: inspection block 1, the inspection gap is 0.02mm; inspection block 2, the inspection gap is 0.04mm; inspection block 3, the inspection gap is 0). The leakage air pressure at each inspection point is within the qualified range to ensure the normal operation of each inspection point on the positioning pin seat.

[0086] Step S5: Package.

[0087] For other contents of the machining center and its manufacturing method of an automotive engine camshaft bracket of the present invention, refer to the prior art and will not be elaborated here.

[0088] The above are only the preferred embodiments of the present invention, and do not impose any form of limitation on the present invention. Therefore, any modifications, equivalent changes, and decorations made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention still fall within the scope of the technical solution of the present invention.

Claims

1. A machining center for an automotive engine camshaft bracket, characterized in that, It includes a processing fixture and a press-fitting device for clamping an engine camshaft bracket. The processing fixture includes a first workbench, a second workbench perpendicular to the first workbench, and an anti-mistake system disposed within the first workbench and the second workbench; The first workbench includes a processing cross-plate and a first clamping assembly disposed on the processing cross-plate. The camshaft bracket is clamped on the first clamping assembly and processed along a first processing direction; The second workbench includes a processing vertical plate and a second clamping assembly disposed on the processing vertical plate. The camshaft bracket is clamped on the second clamping assembly and processed along a second processing direction; The anti-mistake system includes an anti-mistake air path, a leakage sensor for detecting the airtightness of the anti-mistake air path, and a control center connected to the leakage sensor. The control center detects the airtightness of the anti-mistake air path through the leakage sensor. The anti-mistake air path includes a first air path grid and a second air path grid respectively disposed inside the first workbench and the second workbench; The press-fitting device includes a press-fitting main body, a pin, and an anti-mistake pointer. The pin is installed on the press-fitting main body, and the anti-mistake pointer is located below the pin; The first clamping assembly includes a plurality of first positioning pin seats, first positioning pins assembled on the first positioning pin seats, and a first pressing member for pressing the camshaft bracket; The first pressing member includes a first pressing rod and a first air cylinder for controlling the first pressing rod. The camshaft bracket is fixed to the two first positioning pins through the first pressing rod, and the first air cylinder adjusts the pressure on the camshaft bracket through the first pressing rod; The first air path grid includes a first horizontal through-hole penetrating the processing cross-plate in the X-axis direction, a plurality of first air path holes, and a first through-hole connecting the first horizontal through-hole and the first air path holes. The first through-hole corresponds to the two first air path holes; One end of the first horizontal through-hole is provided with a first interface, and the first interface is connected to the leakage sensor. The end far from the first interface is blocked by a plugging member; The second clamping assembly includes a plurality of second positioning pin seats, second positioning pins assembled on the second positioning pin seats, and a second pressing member for fixing the camshaft bracket; The second pressing member includes a second pressing rod and a second air cylinder for controlling the second pressing rod. The camshaft bracket is fixed to the two second positioning pins through the two second pressing rods, and the second air cylinder adjusts the pressure on the camshaft bracket through the second pressing rod; The second air path grid includes a second horizontal through-hole penetrating the processing cross-plate in the X-axis direction, a plurality of second air path holes, and a second through-hole connecting the second horizontal through-hole and the second air path holes. The second through-hole corresponds to the second air path holes one by one; One end of the second horizontal through-hole is provided with a second interface, and the second interface is connected to the leakage sensor. The end far from the second interface is blocked by a plugging member.

2. The machining center for the camshaft bracket of an automotive engine according to claim 1, characterized in that: The first workbench is further provided with a lower cross-plate fixed on the workbench of the machining center and a plurality of columns connecting the processing cross-plate and the lower cross-plate. The lower cross-plate is arranged parallel to the processing cross-plate, and the first air cylinder is disposed between the processing cross-plate and the lower cross-plate.

3. The machining center for an automotive engine camshaft bracket according to claim 1, characterized in that: The first positioning pin seat is provided with two first detection holes, and the first horizontal through hole, the first air passage hole, the first through hole and the first detection hole form an L1 air passage.

4. The machining center for an automotive engine camshaft bracket according to claim 1, characterized in that: The second positioning pin seat is provided with two second detection holes, and the second horizontal through hole, the second air passage hole, the second through hole and the second detection hole form an L2 air passage.

5. The machining center for an automotive engine camshaft bracket according to claim 1, characterized in that: The anti-mistake system further includes an air source for supplying air to the anti-mistake air passage, and the air source is communicated with the anti-mistake air passage; The air source is communicated with the leakage sensor to form an L4 air passage.

6. A manufacturing method of a camshaft bracket for an automobile engine, characterized in that, A machining center applicable to the automotive engine camshaft bracket according to any one of claims 1-5; the camshaft bracket includes an abutting surface, a large bonding plane disposed away from the abutting surface, a shaft hole adapted to the camshaft, shaft hole end faces provided at both ends of the shaft hole, and two φ9 pin holes; It includes the following steps: Step S1, machining the to-be-machined camshaft bracket in the first machining direction; Step S1.1, clamping the to-be-machined camshaft bracket with the large bonding plane facing upward on the first clamping assembly, using the two φ9 pin holes as rough positioning holes and the abutting surface as the rough positioning surface; Step S1.2, checking the airtightness of the first air passage grid through the leakage sensor; Step S1.3, drilling and reaming the φ9 pin holes; Step S1.4, roughing and finishing the large bonding plane; Step S1.5, cleaning the camshaft bracket; Step S2, machining the camshaft bracket machined in the first machining direction in the second machining direction; Step S2.1, clamping the camshaft bracket machined in the first machining direction with the shaft hole end face facing upward on the second clamping assembly, using the two φ9 pin holes as fine positioning holes and the large bonding plane as the fine positioning surface; Step S2.2, checking the airtightness of the second air passage grid through the leakage sensor; Step S2.3, roughing and finishing the shaft hole end faces; Step S2.4, cleaning the camshaft bracket; Step S3, pressing two φ9 pins on the camshaft bracket; Step S4, full inspection; Step S5, packaging.

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