Grooving device for engine rocker arm part
By combining multi-station clamping and grooving tools, the problems of low efficiency and high cost in the machining of engine rocker arm parts are solved, achieving efficient and stable machining results.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-11
- Publication Date
- 2026-03-31
AI Technical Summary
Existing technologies for machining engine rocker arm parts suffer from problems such as limited worktable size range, single-station clamping method, high tool cost, low operating efficiency, easy deformation of fixtures, and dimensional deviation.
The system employs a carrier plate with three clamping stations and a grooving cutter. Multi-station clamping is achieved through clamping mandrels, positioning blocks, and pop-out limit structures. Combined with synchronous grooving by a CNC turntable and a moving table, the grooving cutter is used for machining.
It enables efficient multi-station machining, reduces tooling costs and impact, improves machining efficiency and dimensional accuracy, reduces fixture deformation, and enhances the ability of a single person to operate multiple machines.
Smart Images
Figure CN224058842U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of machining technology, and in particular relates to a grooving device for engine rocker arm parts. Background Technology
[0002] The engine rocker arm is a key component of the valve train in a car engine. Its function is to control the opening and closing of the valves. Specifically, the rocker arm is a two-arm lever. (See attached instruction manual) Figure 8 As shown, the engine rocker arm involves a grooving process during manufacturing, where the rocker arm parts are grooved in their raw state.
[0003] Currently, the conventional production mode is to use a horizontal milling machine and a three-sided milling cutter for rotary milling. This method has the following disadvantages: (1) The milling machine table size is limited and the clamping method can only use a single-station pneumatic fixture for cutting, clamping one piece at a time; (2) The cutting speed and feed rate of the three-sided milling cutter are low, resulting in a large impact on the tool; (3) The cost of the three-sided milling cutter is high, leading to high tool wear costs; (4) This method requires one person to operate two machines, resulting in relatively low work efficiency; (5) Due to the large cutting force of the horizontal milling machine, the impact on the fixture and rocker arm parts is large, and the fixture is prone to severe deformation. Long-term production leads to out-of-tolerance form and position, poor surface roughness, and easy dimensional deviation. In addition, the short tool life easily causes dimensional deviation. To address this, this technical solution proposes a device for slotting engine rocker arm parts that can clamp a large number of parts at a time, has high slotting efficiency, relatively low tool wear, and relatively low processing cost. Utility Model Content
[0004] This utility model provides a grooving device for engine rocker arm parts. The device includes a carrier plate with three clamping stations. Each clamping station has a clamping mandrel for fitting into the center hole of the rocker arm part and two clamping blocks. A pop-out limiting structure located in front of the clamping mandrel prevents the rocker arm part from detaching during clamping, and the two clamping blocks provide anti-deviation fixation, ensuring stable clamping of the rocker arm part. The entire grooving device can clamp three sets of rocker arm parts at once, significantly improving efficiency compared to the single clamping method of existing technologies. The cutting tool is mounted on a tool mounting base on a moving platform. The tool consists of a tool holder and a grooving cutter-type insert, offering a larger cutting feed and lower impact force compared to a three-sided milling cutter. The cutting tool is less expensive than a three-sided milling cutter, resulting in lower wear costs. This device allows for single-person operation of multiple machines, simultaneously slotting three sets of rocker arm parts, significantly improving efficiency. For part installation and removal, the rocker arm parts can be directly fitted onto the clamping mandrel, automatically clamped by a pop-out limit structure. Disassembly is achieved by simply releasing the pressure sleeve and gently pushing forward with a hydraulic cylinder rod, quickly and easily removing the machined rocker arm parts, greatly improving installation and disassembly efficiency. Therefore, a single person can operate multiple machines. The CNC turntable for fixing the spindle flange, combined with the clamping mechanism, ensures stable and efficient slotting, minimizing dimensional deviations in the parts. In summary, this device solves the problems in the background technology.
[0005] To solve the above-mentioned technical problems, this utility model is achieved through the following technical solution:
[0006] This utility model discloses a grooving device for engine rocker arm parts, including a part clamping mechanism and a grooving mechanism.
[0007] The part clamping mechanism includes a spindle flange, a connecting sleeve installed on the front side of the spindle flange, a carrier plate installed on the front end of the connecting sleeve, a hydraulic cylinder rod arranged through the center of the spindle flange, a mounting plate installed at the front end of the hydraulic cylinder rod and located behind the carrier plate, and three sets of clamping stations for clamping the rocker arm parts, which are arranged axially symmetrically around the front side of the mounting plate. Each clamping station includes a clamping mandrel that passes through the mounting plate and is fixedly connected to the mounting plate, and a first positioning block and a second positioning block arranged on both sides of the clamping mandrel. The center hole on the rocker arm part is fitted onto the clamping mandrel and its position is limited by the first positioning block and the second positioning block. The front part of the clamping mandrel is provided with a pop-out limiting structure to limit the rocker arm part after it is fitted.
[0008] The grooving mechanism includes a base mounted on a moving platform, a tool mounting seat mounted on the base, a tool holder mounted on the tool mounting seat, and a blade mounted on the front end of the tool holder;
[0009] The cutting tool is moved to the required slotting position in the three clamping stations by the moving table. With the rotation of the spindle flange, the rocker arm parts come into contact with the cutting tool. The synchronous slotting of the three clamping stations is achieved by adjusting the x-axis and Y-axis of the moving table.
[0010] Furthermore, the pop-out limiting structure includes a locking cap fixedly installed in the front end of the clamping spindle, a locking tongue that passes through the mounting hole on the outside of the clamping spindle via a rotating shaft, an abutment block disposed between the front end of the locking tongue and the locking cap, and a compression spring installed between the abutment block and the locking cap. The locking tongue is installed in the front cavity of the clamping spindle and protrudes from the openings on both sides.
[0011] Furthermore, the front end of the compression spring is sleeved on the abutment block, keeping the locking tongue in a side-opening state and limiting the rocker arm component.
[0012] Furthermore, the locking tongue is fitted onto the front end of the clamping mandrel by a release sleeve, and the locking tongue is pressed down by the inner wall of the release sleeve, causing the locking tongue to retract into the side opening.
[0013] Furthermore, the release sleeve is cylindrical, with an inner diameter that is the same as the outer diameter of the clamping mandrel.
[0014] Furthermore, an adjusting nut is installed on the second positioning block, which cooperates with the first positioning block and the clamping spindle to achieve three-point fixation of the rocker arm parts.
[0015] Furthermore, the blade is a grooving blade.
[0016] Furthermore, the spindle flange is fixedly installed on the front side of the CNC turntable in the center hole.
[0017] The present invention has the following advantages over the prior art:
[0018] (1) Improved clamping capacity: The device includes a carrier plate with three clamping stations. Each clamping station is equipped with a clamping mandrel for fitting the center hole of the rocker arm part and two clamping blocks. The rocker arm part is clamped to prevent detachment by the pop-out limiting structure located in front of the clamping mandrel, and is fixed to prevent deviation by the two clamping blocks, so that the rocker arm part can be clamped stably. The entire slotting device can clamp three sets of rocker arm parts at one time, which greatly improves efficiency compared to the single clamping of the existing technology.
[0019] (2) Lower cost and impact: The tool is mounted on a tool mounting base on a moving table. The tool consists of a tool holder and a grooving insert. Compared with a three-sided milling cutter, the cutting supply is relatively larger and the impact is relatively smaller. The grooving insert is cheaper than a three-sided milling cutter, resulting in lower wear cost.
[0020] (3) The operating efficiency is greatly improved: This device enables a single person to operate multiple machines, and a single machine can simultaneously slot three sets of rocker arm parts, greatly improving efficiency. In terms of the installation and disassembly of parts, the rocker arm parts can be directly put into the clamping mandrel, and can be automatically clamped by the pop-out limit structure. When disassembling, the rocker arm parts can be quickly and easily removed by simply pressing the release sleeve and pushing forward slightly by the hydraulic cylinder rod, which greatly improves the efficiency of installation and disassembly. Therefore, a single person can operate multiple machines.
[0021] (4) High grooving stability: The CNC turntable is used to fix the spindle flange and the clamping mechanism can make the grooving action stable and efficient, and the parts are less likely to deviate in size.
[0022] Of course, any product implementing this utility model does not necessarily need to achieve all of the advantages described above at the same time. Attached Figure Description
[0023] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0024] Figure 1 This is a schematic diagram of the structure of a slotting device for engine rocker arm parts according to the present invention after clamping the engine rocker arm parts.
[0025] Figure 2 for Figure 1 A schematic diagram of the structure from the perspective of point A;
[0026] Figure 3 for Figure 1 A schematic diagram of the structure of the part clamping mechanism;
[0027] Figure 4 for Figure 3 A schematic diagram of the structure after removing the rocker arm parts;
[0028] Figure 5 for Figure 3 Longitudinal cross-section;
[0029] Figure 6 This is a partial internal structure diagram of the pop-up limiting structure;
[0030] Figure 7 This is a schematic diagram of the grooving mechanism;
[0031] Figure 8 A schematic diagram of the engine rocker arm components;
[0032] The attached diagram lists the components represented by each number as follows:
[0033] 1-Part clamping mechanism, 101-Main spindle flange, 102-Connecting sleeve, 103-Carrier plate, 104-Mounting plate, 105-Cylinder rod, 106-Clamping spindle, 1061-Lock tongue, 1062-Mounting hole, 1063-Locking cap, 1064-Abutting block, 1065-Compression spring, 1066-Rotating shaft, 107-First positioning block, 108-Second positioning block, 1081-Adjusting nut, 2-Slotting mechanism, 201-Base, 202-Tool mounting seat, 203-Support, 204-Tool holder, 3-Rocker arm parts, 4-Release sleeve. Detailed Implementation
[0034] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.
[0035] In the description of this utility model, it should be understood that the terms "front side", "front end", "center", "surround", "both sides", "center hole", "front part", etc., which indicate orientation or positional relationship, are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the components or elements referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.
[0036] like Figure 8 The figure shows a structural schematic diagram of an engine rocker arm part. As can be seen from the figure, the rocker arm part needs to be slotted on both sides. Currently, a horizontal milling machine is used to perform rotary milling using a three-sided milling cutter. This method has the relevant disadvantages mentioned in the background art. Therefore, the following technical solution is proposed.
[0037] Please see Figure 1-7 As shown, the present invention provides a grooving device for engine rocker arm parts, including a part clamping mechanism 1 and a grooving mechanism 2.
[0038] The part clamping mechanism 1 includes a spindle flange 101, a connecting sleeve 102 mounted on the front side of the spindle flange 101, a carrier plate 103 mounted on the front end of the connecting sleeve 102, a hydraulic cylinder rod 105 passing through the center of the spindle flange 101, a mounting plate 104 mounted on the front end of the hydraulic cylinder rod 105 and located behind the carrier plate 103, and three sets of clamping stations for clamping the rocker arm part 3 surrounding the front side of the mounting plate 104. The three sets of clamping stations are axially symmetrical about the center. Each clamping station includes a part that passes through the mounting plate 104 and is connected to the front side of the carrier plate 103. The mounting plate 104 is fixedly connected to the clamping spindle 106 and the first positioning block 107 and the second positioning block 108 arranged on both sides of the clamping spindle 106. The center hole on the rocker arm part 3 is sleeved on the clamping spindle 106 and its position is limited by the first positioning block 107 and the second positioning block 108. The front of the clamping spindle 106 is provided with a pop-out limiting structure to limit the rocker arm part 3 after it is sleeved. The spindle flange 101 is fixedly installed on the front side of the CNC turntable in the center hole. The CNC turntable is existing technology and will not be described in detail in this solution.
[0039] The grooving mechanism 2 includes a base 201 mounted on a moving platform, a tool mounting seat 202 mounted on the base 201, a tool shank 203 mounted on the tool mounting seat 202, and a blade 204 mounted on the front end of the tool shank 203. The blade 204 is a grooving tool. In this specific embodiment, a commercially available MGMN400-JH type grooving tool is used, which is suitable for grooving steel parts with an angle of less than 40 degrees such as 45# steel, A3 steel, spring steel, and mold steel. The blade 204 and the tool shank 203 are fastened together by bolts.
[0040] like Figure 1-2 As shown, the cutting tool 204 is moved to the position where grooving is required in the three clamping stations by the moving table. Under the rotation of the spindle flange 101, the rocker arm part 3 comes into contact with the cutting tool 204. The synchronous grooving of the three clamping stations is achieved by adjusting the x-axis and Y-axis of the moving table. The moving table is an existing technical solution that can realize the movement of the X-axis and Y-axis, so that the cutting tool 204 can move and adjust its position.
[0041] The pop-out limiting structure includes a locking cap 1063 fixedly installed in the front end of the clamping spindle 106, a locking tongue 1061 passing through a mounting hole 1062 on the outside of the clamping spindle 106 via a rotating shaft 1066, an abutment block 1064 disposed between the front end of the locking tongue 1061 and the locking cap 1063, and a compression spring 1065 installed between the abutment block 1064 and the locking cap 1063. The locking tongue 1061 is installed in the front cavity of the clamping spindle 106 and protrudes from openings on both sides. For details on the structure of the locking tongue 1061, the locking cap 1063, and the abutment block 1064, please refer to [link to relevant documentation]. Figure 5-6 As shown.
[0042] The compression spring 1065 is sleeved on the abutment block 1064 at its front end, so that the locking tongue 1061 is kept in a side-opening state, thus limiting the rocker arm part 3.
[0043] The locking tongue 1061 is fitted onto the front end of the clamping spindle 106 by the release sleeve 4, and the locking tongue 1061 is pressed down by the inner wall of the release sleeve 4, causing the locking tongue 1061 to retract into the side opening.
[0044] Among them, the release sleeve 4 is a round tube with the same inner diameter as the outer diameter of the clamping mandrel 106.
[0045] The second positioning block 108 is equipped with an adjusting nut 1081, which cooperates with the first positioning block 107 and the clamping spindle 106 to achieve three-point fixation of the rocker arm part 3.
[0046] The grooving action of this device is as follows: The rocker arm part 3 is fitted onto the clamping mandrel 106 for assembly. After fitting, it is automatically clamped by the pop-out limit structure and positioned by two positioning blocks. The hydraulic cylinder pull rod 105 is pulled backward to press the rear side of the locking tongue 1061 on the pop-out limit structure against the front side of the rocker arm part 3 to achieve hydraulic clamping. The spindle flange 101 is rotated by CNC and the tool moves on the moving table to perform grooving. After grooving is completed, the locking tongue 1061 on the pop-out limit structure is released from clamping by releasing the hydraulic cylinder pull rod 105 and pushing it forward. The release sleeve 4 is inserted into the clamping mandrel 106 to press the locking tongue 1061 down into the receiving cavity. At the same time, the processed rocker arm part 3 is taken out to complete the material removal.
[0047] This solution utilizes a dedicated grooving cutter, resulting in low cutting force and reliable fixture positioning. Hydraulic clamping is more reliable and stable than pneumatic clamping, leading to high dimensional accuracy and significantly improved surface roughness. The CPK (Cured Per Kilometer) capability is guaranteed to be above 1.67. It allows for the processing of three parts at a time, enabling one person to operate four lathes, at least doubling production efficiency. The cutting tool uses grooving inserts, resulting in long tool life and reducing tool costs by over 80% compared to three-sided end mills.
[0048] The preferred embodiments of this utility model disclosed above are merely illustrative of the present utility model. These preferred embodiments do not exhaustively describe all details, nor do they limit the utility model to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of this utility model, thereby enabling those skilled in the art to better understand and utilize it. This utility model is limited only by the claims and their full scope and equivalents.
Claims
1. A slotting device for engine rocker arm parts, characterized in that, The utility model relates to a kind of slotting mechanism (2) and part clamping mechanism (1) comprising; The part clamping mechanism (1) includes spindle flange (101), the connecting sleeve (102) installed on the front side of spindle flange (101), the carrier plate (103) installed on the front end of connecting sleeve (102), the oil cylinder pull rod (105) arranged through the center of spindle flange (101), the mounting plate (104) installed on the front end of oil cylinder pull rod (105) and located behind carrier plate (103), and three groups of clamping stations for clamping rocker arm parts (3) are installed around the front side of mounting plate (104), and three groups of clamping stations are arranged in axial symmetry based on the center of circle;Single clamping station includes clamping mandrel (106) fixedly connected through the rear of mounting plate (104) and mounting plate (104), and first positioning block (107) and second positioning block (108) arranged on both sides of clamping mandrel (106), the center hole on rocker arm part (3) is sleeved on clamping mandrel (106) and positionally limited by first positioning block (107) and second positioning block (108), and the ejection limiting structure for limiting the rocker arm part (3) sleeved after is arranged on the front part of clamping mandrel (106); The slotting mechanism (2) includes base (201) installed on moving table, tool mounting seat (202) installed on base (201), cutter bar (203) installed on tool mounting seat (202), and blade (204) installed on the front end of cutter bar (203).
2. A slotting device for engine rocker arm parts as claimed in claim 1, wherein, The ejection limiting structure includes locking cap (1063) fixedly installed in the front end of clamping mandrel (106), lock tongue (1061) through pivot (1066) through the mounting hole (1062) outside clamping mandrel (106), abutting block (1064) arranged between the front end of lock tongue (1061) and locking cap (1063), and compression spring (1065) installed between abutting block (1064) and locking cap (1063), and the lock tongue (1061) is installed in the cavity of the front part of clamping mandrel (106) and protrudes from both sides.
3. A slotting device for engine rocker arm parts as defined in claim 2, characterized in that The front end of compression spring (1065) is sleeved on abutting block (1064), so that the lock tongue (1061) keeps protruding from both sides, and the rocker arm part (3) is limited.
4. A slotting device for engine rocker arm parts as claimed in claim 3, wherein, The lock tongue (1061) is sleeved on the front end of clamping mandrel (106) by removing the release sleeve (4), and the lock tongue (1061) is retracted into the side opening by pressing the lock tongue (1061) in the inner wall of release sleeve (4).
5. A slotting device for engine rocker arm parts as defined in claim 4, characterized in that The release sleeve (4) is a circular tube, and the inner diameter is the same as the outer diameter of clamping mandrel (106).
6. A slotting device for engine rocker arm parts as defined in claim 1, wherein, The second positioning block (108) is provided with an adjusting nut (1081), which cooperates with the first positioning block (107) and the clamping mandrel (106) to realize three-point fixation of the rocker arm part (3).
7. A slotting device for engine rocker arm parts as defined in claim 1, wherein, The blade (204) adopts a slotting cutter.
8. A slotting device for engine rocker arm parts as defined in claim 1, wherein, The spindle flange (101) is fixedly installed on the front side of the CNC rotary table of the center hole.