A crank pin oil hole port polishing device

Abstract

This application provides a grinding and polishing device for crank pin oil holes, including a machine bed; a cylinder mounting base fixedly mounted on the machine bed, with a cylinder mounting arm vertically mounted on the cylinder mounting base; a clamping cylinder mounted on the cylinder mounting arm for clamping tooling fixtures; a rotary table fitted on the cylinder mounting base, having several circumferentially distributed tooling fixtures; a rotary table driver mounted on the machine bed and connected to the rotary table for driving the rotary table to rotate; and a linear drive grinding assembly for grinding oil holes at different positions on the crank pin. Applying this application enables automatic grinding and polishing of oil holes on crank pins and allows for the simultaneous processing of multiple crank pins, greatly improving processing efficiency and reducing safety hazards.

Description

Technical Field

[0001] This application relates to the field of crank pin processing equipment technology, and more specifically, to a crank pin oil hole grinding and polishing device. Background Technology

[0002] When a motorcycle engine is running in the housing, the crankpin 1 rubs against the bearing or bushing, so lubricating oil is needed to form an oil film on the friction surface to prevent wear, heat, and crankshaft seizure. The lubricating oil needs to be supplied to the friction contact surface through the oil hole in the crankpin 1 hole. Therefore, the oil hole 101 position must be ground and polished. Because this position is in contact with the bearing or bushing, if the surface is not smooth enough and forms a sharp corner, it will damage the oil film and cause the crankshaft connecting rod to stick or the crankshaft to seize. To solve this problem, the oil hole 101 of the crankpin 1 must be ground and polished.

[0003] like Figures 1 to 6 As shown, there are two basic forms of oil holes for crank pin 1, with process holes at the ends, but the positions of the oil hole openings 101 are different. The left and right cranks are pressed together with the connecting rods via crank pin 1 to form a complete crankshaft. One end of the oil hole 101 contacts the bearing or bushing, and the other end contacts the crankshaft oil hole. Sharp corners are not allowed at the openings. To meet this requirement, each oil hole opening 101 on crank pin 1 needs to be ground and polished.

[0004] Currently, there are two methods for grinding and polishing: the first is manual grinding, which uses pneumatic or electric tools with a grinding wheel installed; the second is to mount the grinding wheel on a bench drill and manually hold the crank pin 1 against it for grinding. Both methods suffer from low processing efficiency and low precision, require high technical skills from personnel, are costly to perform manual grinding, and pose certain safety hazards due to the risk of injury during manual grinding.

[0005] Therefore, it is urgent to improve the existing grinding method for the oil hole opening of crank pin 1 in order to improve grinding accuracy and efficiency and reduce grinding cost. Summary of the Invention

[0006] This application provides a grinding and polishing device for crank pin oil hole, which significantly improves grinding accuracy and efficiency, reduces grinding costs, and increases processing safety.

[0007] This application provides a device for grinding and polishing crank pin oil hole openings, including:

[0008] Bed frame;

[0009] A cylinder mounting base is fixedly installed on the bed, and a cylinder mounting arm is vertically installed on the cylinder mounting base;

[0010] A clamping cylinder is installed on the cylinder mounting arm to clamp the crank pin;

[0011] A rotary worktable, mounted on the cylinder mounting base, has several tooling fixtures distributed circumferentially;

[0012] A rotary table driver is mounted on the bed and connected to the rotary table to drive the rotary table to rotate.

[0013] A linear drive grinding assembly is used to grind the oil holes at different locations on the crank pin.

[0014] In some embodiments, the linear drive grinding assembly includes a plurality of grinding devices with grinding oil orifices and a linear drive device for driving the grinding devices to reciprocate linearly.

[0015] In some embodiments, the grinding device is specifically a floating electric spindle.

[0016] In some embodiments, the linear drive module includes a ball screw, a ball screw motor, and a linear guide.

[0017] In some embodiments, both the rotary table driver and the ball screw motor are servo motors.

[0018] In some embodiments, the clamping cylinder, the rotary table driver, and the ball screw motor are connected to a controller.

[0019] The crankpin oil hole grinding and polishing device provided in this application grinds the crankpin oil hole simultaneously through multiple linear drive grinding components, and switches the oil hole to be ground by rotating the rotary worktable, thereby realizing the automatic grinding and polishing of each oil hole on multiple crankpins. It adopts an automated processing method to replace the traditional manual grinding method, realizes the automated grinding and polishing of crankpin oil hole openings, is suitable for mass production of crankpins, greatly improves the production efficiency of the entire process, and greatly reduces safety hazards. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of this application. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0021] Figure 1 A front view of a crank pin hole in the crank pin hole polishing device provided in this application;

[0022] Figure 2A side view of a crank pin oil hole in the crank pin oil hole grinding and polishing device provided in this application;

[0023] Figure 3 A top view of a crank pin oil hole in the crank pin oil hole grinding and polishing device provided in this application;

[0024] Figure 4 This is a front view of another crank pin hole in the crank pin hole polishing device provided in this application.

[0025] Figure 5 A side view of another crank pin oil hole for the crank pin oil hole grinding and polishing device provided in this application;

[0026] Figure 6 A top view of another crank pin oil hole for the crank pin oil hole grinding and polishing device provided in this application;

[0027] Figure 7 A front view of the crank pin oil hole grinding and polishing device provided in this application;

[0028] Figure 8 This is a top view of the crank pin oil hole grinding and polishing device provided in this application.

[0029] Among them, 1-crank pin, 2-bed, 3-cylinder mounting seat, 4-clamping cylinder, 5-rotary worktable, 6-rotary worktable driver, 7-grinding device, 8-ball screw, 9-ball screw motor, 10-tooling fixture.

[0030] 101 - Oil port, 301 - Cylinder mounting arm. Detailed Implementation

[0031] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0032] Please refer to Figure 7 and Figure 8 , Figure 7 A front view of the crank pin oil hole grinding and polishing device provided in this application; Figure 8 This is a top view of the crank pin oil hole grinding and polishing device provided in this application.

[0033] This application provides a grinding and polishing device for crank pin oil hole, mainly including a bed 2, a cylinder mounting base 3, a clamping cylinder 4, a rotary table 5, a rotary table driver 6, and a linear drive grinding assembly. The cylinder mounting base 3 is fixedly mounted on the bed 2 via a connector. Cylinder mounting arms 301 are mounted on the cylinder mounting base 3, and the number of cylinder mounting arms 301 is set according to the number of clamping cylinders 4. Each cylinder mounting arm 301 is perpendicular to the axis of the cylinder mounting base 3 and is fitted onto the top of the cylinder mounting base 3. By rotating the cylinder mounting arm 301, the angle of the clamping cylinder 4 can be adjusted so that the clamping cylinder 4 corresponds to the crank pin 1 on the tooling fixture 10. The clamping cylinder 4 is mounted at the end of the cylinder mounting arm 301, and extends to clamp and position the crank pin 1. The rotary table 5 is centrally mounted on the cylinder mounting base 3 and can rotate relative to the cylinder mounting base 3. Several circumferentially distributed tooling fixtures 10 are fixedly mounted on the rotary table 5, and the crank pin 1 is fixed to the tooling fixtures 10. Using the rotary table 5 as a material storage turntable, multiple parts can be stored, enabling uninterrupted loading and unloading. The rotary table 5 is connected to a rotary table driver 6, which is mounted on the bed 2 and drives the rotary table 5 to rotate. A linear drive grinding assembly is mounted on the bed 2 and can grind the oil holes 101 at different positions on the crank pin 1.

[0034] A special tooling fixture 10 is used to position the part. The tooling fixture 10 uses general-purpose parts to ensure easy replacement. The crank pin 1 to be ground is accurately positioned through the process hole, and a clamping cylinder 4 is installed at the grinding and polishing position to clamp the part, ensuring that the part being ground is accurately and stably positioned.

[0035] When using the crank pin oil hole polishing device provided in this application to polish the crank pin 1 oil hole 101, the following steps are specifically performed:

[0036] Step 1: Manually install the crank pin 1 to be processed onto the tooling fixture 10;

[0037] Step 2: The rotary table driver 6 drives the rotary table 5 to automatically rotate one position angle;

[0038] Step 3: Press cylinder 4 to press crank pin 1 at the machining position;

[0039] Step 4: The linear drive grinding assembly feeds and polishes the single oil hole 101 of the crank pin 1.

[0040] Step 5: The linear drive grinding assembly retracts, the clamping cylinder 4 retracts, and the rotary table 5 automatically rotates to a position angle, ready to process another oil hole 101;

[0041] Step 6: Repeat the above steps until all oil holes 101 on each crank pin 1 are machined.

[0042] This application comprises a special machine tool for grinding and polishing crank pin oil hole openings, consisting of a rotary table driver 6, a linear drive grinding assembly, a rotary table 5, a clamping cylinder 4, and a cylinder mounting base 3. It grinds and polishes the oil hole openings of crank pins 1 until smooth, and can simultaneously grind and polish oil holes on different parts, enabling uninterrupted processing and loading / unloading. It has strong applicability, high production efficiency, and easily guaranteed safety. It is especially suitable for grinding and polishing crank pins 1 with multiple oil holes. Furthermore, due to the rotary table hopper design, one person can operate multiple machines, improving production efficiency and making it suitable for mass production of crank pins 1.

[0043] In one specific embodiment, the linear drive grinding assembly includes a plurality of grinding devices 7 with grinding oil orifice 101 and a number of linear drive devices corresponding to the grinding devices 7. The linear drive devices are connected to the grinding devices 7, and the feed motion of the linear drive devices can drive the grinding devices 7 to reciprocate linearly.

[0044] Preferably, the grinding device 7 is a floating electric spindle, using a dedicated radial floating electric spindle as the power output component. Taking full advantage of the radial floating characteristic of the radial floating electric spindle, it grinds the oil hole 101. This allows for tilting of the oil hole at a certain position, meeting the flexible grinding and polishing requirements of the intersection lines of the holes. By adjusting the module fixing seat, the center of the grinding head of the floating electric spindle is aligned with the center of the oil hole 101, ensuring a standardized and round grinding. By installing multiple grinding components, multiple oil holes 101 on the crank pin 1 can be ground and polished, improving machining accuracy.

[0045] In one specific embodiment, the linear drive module includes a ball screw 8, a ball screw motor 9, and a linear guide. The floating electric spindle is fixed on the worktable mounted on the upper part of the ball screw 8. The worktable is mounted on the linear guide. The ball screw motor 9 is fixedly mounted on the side of the linear guide and / or the bed 2. The ball screw motor 9 provides rotational driving force to the ball screw 8. The worktable on the ball screw 8 runs along the linear guide, thereby driving the grinding device 7 to the target position, forward to the grinding station, or backward to the initial position.

[0046] The rotary table driver 6 and the ball screw motor 9 mentioned above are preferably servo motors. Under the drive of the servo motor, the rotary table 5 rotates only one station at a time, making the rotation control more precise.

[0047] Furthermore, the clamping cylinder 4, the rotary table driver 6, and the ball screw motor 9 are connected to an external controller, which enables digital and automated control of the clamping cylinder 4, the rotary table driver 6, and the ball screw motor 9, resulting in more precise operation.

[0048] It should be noted that in this specification, relational terms such as first and second are used only to distinguish one entity from several other entities, and do not necessarily require or imply any such actual relationship or order between these entities.

[0049] The crank pin oil hole grinding and polishing device provided in this application has been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of this application. The descriptions of the above embodiments are only for the purpose of helping to understand the method and core ideas of this application. It should be noted that those skilled in the art can make several improvements and modifications to this application without departing from the principles of this application, and these improvements and modifications also fall within the protection scope of the claims of this application.

Claims

1. A device for grinding and polishing the oil hole of a crank pin, characterized in that, include: Bed frame (2); A cylinder mounting base (3) is fixedly installed on the bed (2), and a cylinder mounting arm (301) is vertically installed on the cylinder mounting base (3); A clamping cylinder (4) is installed on the cylinder mounting arm (301) to clamp the crank pin (1); A rotary worktable (5) is mounted on the cylinder mounting base (3) and has several tooling fixtures (10) distributed circumferentially. A rotary table driver (6) is mounted on the bed (2) and connected to the rotary table (5) to drive the rotary table (5) to rotate; A linear drive grinding assembly is used to grind the oil holes (101) at different positions of the crank pin (1). The linear drive grinding assembly includes several grinding devices (7) for grinding the oil holes (101) and a linear drive device for driving the grinding devices (7) to reciprocate linearly. The grinding device (7) is specifically a floating electric spindle.

2. The crank pin oil hole grinding and polishing device according to claim 1, characterized in that, The linear drive device includes a ball screw (8), a ball screw motor (9), and a linear guide.

3. The crank pin oil hole grinding and polishing device according to claim 2, characterized in that, Both the rotary table driver (6) and the ball screw motor (9) are servo motors.

4. The crank pin oil hole grinding and polishing device according to any one of claims 2 or 3, characterized in that, The clamping cylinder (4), the rotary table driver (6), and the ball screw motor (9) are connected to the controller.

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