Engine main camshaft hole boring and milling cutter tool setter

Abstract

The present invention belongs to the technical field of engine manufacturing, and discloses a tool aligner for the main camshaft hole boring bar of an engine, which includes a clamping mechanism and a measuring mechanism. The clamping mechanism includes a fixed part and a movable part. The fixed part is arranged on the side of the boring bar. There are two clamping parts on the fixed part, and the contact surface between the clamping part and the boring bar is parallel to the axis of the boring bar. The measuring mechanism is arranged on the side of the fixed part. The measuring mechanism includes a measuring rod and a micrometer. The measuring rod is swingably installed on the fixed part, and the swing axis of the measuring rod is parallel to the axis of the boring bar. The measuring rod is perpendicular to both the axis of the boring bar and the axis of the tool. The micrometer is installed on the fixed part, and the axis of the dial head of the micrometer is parallel to the axis of the tool. The aligner of the present invention, by means of laying the measuring rod flat and placing the mechanism sideways, can not only solve the problem that the measurement cannot be carried out due to the interference object above the tool, but also the whole device is automatically and tightly clamped on the measured boring bar, and can be operated with one hand, which is convenient for reading and tool adjustment.

Description

Technical Field

[0001] The invention belongs to the technical field of engine manufacturing, and relates to a deep hole processing technology for main and cam shafts of an engine cylinder block, and specifically to a tool setting device of an extended boring row used in adjusting and processing the deep holes for main and cam shafts of an engine cylinder block. Background Art

[0002] In the field of engine manufacturing, the machining accuracy of the cam hole (used to install the camshaft) is a key dimension in engine manufacturing, and its accuracy plays a decisive role in the performance of the engine.

[0003] The function of the camshaft is to open and close the valve in time according to the instructions of the engine's valve timing to ensure that the engine completes the four strokes of intake, compression, combustion, and exhaust. The camshaft mounting hole of the early engine was on the cylinder block, and the crankshaft drove the camshaft gear through the crankshaft gear and the idler shaft gear to rotate the camshaft. Due to the strict requirements on the center distance of the gear, the crankshaft hole, the idler shaft hole, and the camshaft hole are required to be fine-machined at one time after the cylinder block is positioned and clamped to ensure the hole spacing, hole diameter, and hole surface roughness. Among them, the guarantee of the hole diameter requires both precise tool setting. The manufacture of any excellent product is inseparable from precise measuring instruments, so it is very necessary to find various clever ways to protect our accuracy and improve our production efficiency. The existing boring tool tool setting method is to install the micrometer on the boring bar through the clamping tool, so that the head of the meter is aligned with the tool head to measure the tool head position. This method has at least two problems. On the one hand, it is not easy for the head to align with the tool tip, which affects the measurement accuracy; on the other hand, the clamping tool and the micrometer will be interfered by the frame above the tool head, which hinders the measurement. Summary of the invention

[0004] The invention aims to solve the problem of how to accurately measure and adjust the size of a boring tool for an engine camshaft hole.

[0005] In view of the above technical problems, the present invention proposes a mechanical tool setting instrument specially designed for boring tools for machining engine main cam shaft holes. The technical solution is as follows:

[0006] An engine main camshaft hole boring bar tool setter, comprising a clamping mechanism for fixing the instrument on the boring bar and a measuring mechanism for calibrating the protrusion amount of the tool on the boring bar. It is characterized in that the clamping mechanism includes a fixed part and a movable part. The fixed part is vertically arranged on the side of the boring bar. There are two clamping parts on the fixed part facing the axis of the boring bar from different angles. The contact surface between the clamping part and the boring bar is parallel to the axis of the boring bar. The measuring mechanism is arranged on the side of the fixed part. The measuring mechanism includes a measuring rod and a micrometer. The middle of the measuring rod is swingably installed on the fixed part. The swing axis of the measuring rod is parallel to the axis of the boring bar. The measuring rod is perpendicular to both the axis of the boring bar and the axis of the tool. The micrometer is installed on the fixed part through a mounting seat. The axis of the micrometer head is parallel to the axis of the tool. The measuring end of the measuring rod is above the micrometer head, and the measuring end is above the tool.

[0007] Further, the measuring rod is a symmetric structure centered on the swing axis.

[0008] Further, the measuring end of the measuring rod is provided with a force-bearing plane perpendicular to the axis of the tool, and the measuring end of the measuring rod is provided with a force-applying plane perpendicular to the axis of the micrometer head.

[0009] Further, the movable part can be rotatably arranged on the fixed part or can be slidably arranged on the fixed part.

[0010] Further, the fixed part is a C-shaped clamping block, and the movable part is a clamping rod. The clamping block is a structure stretched along the axial direction of the boring bar. The groove of the clamping block faces the boring bar. There is a chamfered inclined plane at each of the upper and lower ends of the groove as the clamping surface. The chamfered inclined plane is tangent to the circumferential surface of the boring bar. There is a through clamping rod assembly hole in the part of the clamping block that is higher than the boring bar. The clamping rod is installed in the clamping rod assembly hole and is in sliding fit with the assembly hole. The clamping rod horizontally straddles the boring bar, and the front end bends downward to form a clamping part. A handle is provided at the rear end of the clamping rod for operating the clamping rod. A compression spring is provided between the handle and the clamping block on the clamping rod.

[0011] Further, a rubber tube is sleeved on the clamping part of the clamping rod to protect the boring bar from damage.

[0012] Further, a handle is provided at the back of the clamping block for holding the tool setter by hand.

[0013] Further, the mounting seat of the micrometer is fixed at the back of the clamping block. The gauge clamp on the mounting seat extends from the side of the clamping block. The micrometer head is arranged in the gauge clamp. A bushing is provided between the micrometer head and the gauge clamp. A knurled screw for fastening the micrometer head is provided on the side of the gauge clamp. The measuring core column in the micrometer head passes upward through the gauge clamp, and a flat measuring head is installed at the upper end of the measuring core column. The flat measuring head contacts the force-applying plane on the measuring rod.

[0014] Further, the mounting base of the dial indicator includes a vertically fixed mounting portion, an axially extending portion, and a radially extending portion. The fixed mounting portion is vertically strip-shaped and is fixedly connected to the clamping block by bolts. The axially extending portion is connected to the upper end of the fixed mounting portion. The radially extending portion and the axially extending portion form an L-shaped mounting bracket, and a through hole serving as a dial gauge clamp is provided on the radially extending portion.

[0015] Further, a swing shaft hole is provided in the middle of the measuring rod. The measuring rod mounting shaft passes through the swing shaft hole and is connected to the clamping block. A spacer is provided between the measuring rod and the clamping block on the measuring rod mounting shaft.

[0016] As an improvement, a limit screw is provided on one side of the swing shaft hole of the measuring rod, and a limit plane is provided at the end of the measuring rod mounting shaft corresponding to the limit screw. The limit screw and the limit plane cooperate to limit the swing angle of the measuring rod.

[0017] The beneficial effects of the present invention are as follows: The present invention designs a clamping mechanism with an axial orientation function for the cylindrical structure of the boring bar, and designs a set of special lever-type measuring mechanisms for the radial relationship between the boring tool and the boring bar. First, the orientation function of the clamping mechanism, in cooperation with the parallel and perpendicular relationships between the main components of the measuring mechanism and between the measuring mechanism and the boring bar and the tool, can easily achieve the alignment process before measurement through a simple clamping action. Second, it is composed of a side-mounted clamping mechanism and a horizontal lever-type measuring mechanism, so that the instrument has a very small height above the tool, avoiding interference with the use of the instrument by the mechanism above the tool tip. Third, the lever-type measuring rod converts the parallel force into a perpendicular force, effectively reducing the measurement error caused by the force deflection angle (there is a deflection angle between the axis of the dial indicator and the axis of the tool). Fourth, the setting of the force-receiving plane and the force-applying plane at both ends of the measuring rod effectively reduces the measurement error caused by the axial alignment deviation. Description of the Drawings

[0018] Figure 1 is a schematic structural diagram of the tool setter of the present invention.

[0019] Figure 2 is Figure 1 the left view of

[0020] Figure 3 is a schematic diagram of the use state of the tool setter of the present invention. Detailed Embodiments

[0021] Referring to the attached drawings, for the tool setter of the present invention, a C-shaped clamping block (3) is attached to the boring bar 1, and through the clamping rod (12), it is tightly attached to the boring bar 1 by the pulling force of the spring (10). A clamping rod handle (9) is installed at the rear end of the clamping rod (12), and a rubber tube (13) is sleeved at the front end. The clamping rod handle (9) is for convenient operation, and the rubber tube (13) is to protect the boring bar from damage. A handle (6) is installed behind the C-shaped clamping block (3) for holding the tool setter by hand. A measuring rod mounting shaft (14) and a spacer (17) are installed on the C-shaped clamping block (3), and the measuring rod (11) is horizontally and flexibly installed on the C-shaped clamping block (3) to form a measuring lever. The limit screw (18) is threadedly connected to the measuring rod (11). By using the gap with the plane (14) at the end of the measuring rod mounting shaft, the rotation angle of the measuring rod (11) around the measuring rod mounting shaft (14) is limited, ensuring that the measuring rod remains approximately horizontal in the free state. Since the instrument is a precision instrument, when storing, the limit screw (18) needs to be removed to completely separate the measuring rod (11) from the dial indicator (5), ensuring that the precision compression spring inside the dial indicator relaxes back to the free state to avoid spring failure caused by long-term compression.

[0022] A dial indicator mounting seat 2 is installed on the C-shaped clamping block (3). The dial indicator clamp (4), bushing (7) and knurled screw (15) on the dial indicator mounting seat 2 fix the dial indicator (5) and ensure that the measuring core column of the dial indicator (5) can flexibly extend and retract. The flat measuring head (8) installed at the upper end of the measuring core column of the dial indicator (5) contacts the measuring end of the measuring rod (11), and the measuring end of the measuring rod (11) contacts the tool. When the tool rises, the flat measuring head (8) of the dial indicator (5) is pressed down; conversely, when the tool descends, the flat measuring head (8) of the dial indicator (5) rises, driving the dial pointer to indicate the data.

[0023] During actual use, first, the installed and adjusted tool setter is calibrated on the gauge (16) to obtain the required size and accuracy of the main camshaft hole of the engine, and the dial indicator (5) is zeroed at the required size. Then, the tool setter is placed on the boring bar to calibrate the tool, and the tool is adjusted to the position where the dial indicator (5) is zeroed through the fine adjustment screw 21. Finally, the tool is fixed by the fastening screw 22, and the tool setting is completed.

[0024] The tool setter of the present invention, by the way of placing the measuring rod horizontally and the mechanism horizontally, can not only solve the problem that there are interfering objects above the tool and it cannot be measured, but also the whole device is automatically and tightly clamped on the measured boring bar, and can be operated with one hand, which is convenient for reading and tool adjustment, quickly and labor-saving to complete the tool setting, and has no impact on the machine tool and the boring bar. Moreover, it is simple to manufacture and convenient to use. Placing the dial on the side is easy to observe, and the line of sight can be flush with the center of the dial, which is beneficial to improving the detection accuracy.

Claims

1. An engine main camshaft hole boring and reaming tool aligner, comprising a clamping mechanism for fixing the instrument on the boring and reaming bar and a measuring mechanism for calibrating the protrusion amount of the tool on the boring and reaming bar, characterized in that The clamping mechanism includes a fixed part and a movable part. The fixed part is vertically arranged on the side of the boring bar. There are two clamping parts on the fixed part that face the axis of the boring bar from different angles, and the contact surface between the clamping part and the boring bar is parallel to the axis of the boring bar. The measuring mechanism is arranged on the side of the fixed part. The measuring mechanism includes a measuring rod and a micrometer. The middle of the measuring rod is swingably installed on the fixed part, and the swing axis of the measuring rod is parallel to the axis of the boring bar. The measuring rod is perpendicular to both the axis of the boring bar and the axis of the tool. The micrometer is installed on the fixed part through a mounting seat. The axis of the dial head of the micrometer is parallel to the axis of the tool. The measuring end of the measuring rod is above the dial head of the micrometer, and the measuring end is above the tool. The measuring rod is a symmetric structure centered on the swing axis. The measuring end of the measuring rod is provided with a stress plane perpendicular to the axis of the tool, and the measuring end of the measuring rod is provided with a force application plane perpendicular to the axis of the dial head.

2. The boring bar aligner for the main camshaft hole of the engine according to claim 1, characterized in that, The movable part is rotatably arranged on the fixed part or slidably arranged on the fixed part.

3. The boring bar aligner for the main camshaft hole of the engine according to claim 1, characterized in that, The fixed part is a C-shaped clamping block, and the movable part is a clamping rod. The clamping block is a structure that stretches along the axial direction of the boring bar. The groove of the clamping block faces the boring bar, and there is a chamfered inclined plane at each of the upper and lower ends of the groove as a clamping surface. The chamfered inclined plane is tangent to the circumferential surface of the boring bar. There is a clamping rod assembly hole that runs through from front to back at the part of the clamping block that is higher than the boring bar. The clamping rod is installed in the clamping rod assembly hole and is in sliding fit with the clamping rod assembly hole. The clamping rod transversely straddles the boring bar, and the front end bends downward to form a clamping part. A handle is provided at the rear end of the clamping rod for operating the clamping rod. A compression spring is provided between the handle and the clamping block on the clamping rod.

4. The boring bar tool setter for the main camshaft hole of the engine according to claim 3, characterized in that, A rubber tube is sleeved on the clamping part of the clamping rod; a handle is provided at the back of the clamping block.

5. The boring and aligning tool for the main camshaft hole of the engine according to claim 3, characterized in that The mounting seat of the micrometer is fixed at the back of the clamping block. The clip on the mounting seat extends from the side of the clamping block. The dial head of the micrometer is arranged in the clip. A bushing is provided between the dial head and the clip. A knurled screw for fastening the dial head is provided on the side of the clip. The measuring core column in the dial head passes upward through the clip, and a flat measuring head is installed at the upper end of the measuring core column. The flat measuring head contacts the force application plane on the measuring rod.

6. The boring and aligning tool for the main camshaft hole of the engine according to claim 5, characterized in that, The mounting seat of the micrometer includes a vertically fixed mounting part, an axially extending part, and a radially extending part. The fixed mounting part is in a vertical strip shape and is fixedly connected to the clamping block through bolts. The axially extending part is connected to the upper end of the fixed mounting part. The radially extending part and the axially extending part form an L-shaped mounting bracket, and a through hole serving as a clip is provided on the radially extending part.

7. The boring and aligning tool for the main camshaft hole of the engine according to claim 3, characterized in that, A swing shaft hole is provided in the middle of the measuring rod. The measuring rod mounting shaft passes through the swing shaft hole and is connected to the clamping block. A spacer is provided between the measuring rod and the clamping block on the measuring rod mounting shaft.

8. The boring bar aligner for the main camshaft hole of the engine according to claim 7, characterized in that, A limit screw is provided on one side of the swing shaft hole of the measuring rod. A limit plane is provided at the end of the measuring rod mounting shaft corresponding to the limit screw. The limit screw and the limit plane cooperate to limit the swing angle of the measuring rod.

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