Plane milling clamp for connecting rod plane machining

Abstract

The utility model relates to a work fixture, in particular to a plane milling fixture for processing a plane of a connecting rod. A positioning block corresponding to a large-head hole in the connecting rod and a movable block capable of horizontally moving relative to the base are fixed on the base of the plane milling clamp; a V-shaped groove matched with the small end of the connecting rod is formed in one end, facing the positioning block, of the movable block; the positioning block and the movable block form a structure for positioning the connecting rod from two ends; a pushing and pressing screw used for pushing the movable block to horizontally move relative to the base is arranged corresponding to the movable block. One end of the push screw is provided with a handle, and the other end is connected with the movable block; a threaded bushing fixed on the base is sleeved on the push screw; the base is further provided with a large-end supporting block and a small-end supporting block. According to the utility model, the non-machining surface of the connecting rod is clamped and positioned, and the V-shaped clamping surface can ensure that the connecting rod is completely restrained in a plane, so that the machining precision is improved, the accumulation of machining errors is prevented, a workpiece is quickly placed, and the fixture has the characteristics of convenience in clamping and high efficiency.

Description

Technical Field

[0001] The utility model relates to a tooling fixture, in particular to a plane milling fixture for connecting rod plane machining. Background Art

[0002] In the process of industrial production and processing, the fixture is an indispensable tool for clamping and positioning the workpiece to facilitate the processing procedure; the design process of the fixture requires a clear understanding of the processing process of the workpiece, and the corresponding fixture is designed for a certain processing procedure. The connecting rod is an important part in the engine of automobiles and ships. It connects the piston and the crankshaft. Its function is to convert the reciprocating motion of the piston into the rotational motion of the crankshaft, and transmit the force acting on the piston to the crankshaft to output power.

[0003] Since the connecting rod needs to have a higher processing accuracy, the two end faces of the connecting rod need to be processed to maintain the parallelism between the end faces and the symmetry between the two end faces; in the existing clamping scheme, the connecting rod is positioned and clamped by an expansion-type mandrel in the large and small head holes, but the adjustment range of this mandrel is small and it is not suitable for blank surfaces with a large tolerance range; another clamping scheme is to position and press the rod body, but the rod body is usually the weak part of the connecting rod. In order to avoid deformation due to pressing, a smaller force must be used for pressing, and a large feed rate cannot be used, resulting in low processing efficiency; therefore, a high-efficiency milling plane clamp that can be quickly used for blank surface positioning is needed. Utility Model Content

[0004] The utility model aims to provide a milling plane clamp for connecting rod plane processing, which can quickly place the workpiece and has the characteristics of convenient clamping and high efficiency.

[0005] The utility model adopts the following technical solutions to achieve the above purpose:

[0006] A milling fixture for machining a connecting rod plane, a positioning block corresponding to the large head hole on the connecting rod and a movable block that can move horizontally relative to the base are fixed on the base of the milling fixture; the movable block has a V-shaped groove on the end facing the positioning block to cooperate with the small head end of the connecting rod; the positioning block and the movable block constitute a structure for positioning the connecting rod from both ends; a pushing screw is provided corresponding to the movable block to push it to move horizontally relative to the base; a handle is provided at one end of the pushing screw, and the other end is connected to the movable block; a threaded bushing fixed to the base is sleeved on the pushing screw; the base is also provided with a large end support block and a small end support block for supporting the connecting rod.

[0007] A guide bar matched with the movable block is fixed on the base; the guide bars are two located on both sides of the movable block.

[0008] The base is also provided with T-slot bolts and lifting rings.

[0009] The utility model provides a milling plane clamp for connecting rod plane processing, which utilizes the above technical scheme to clamp and position the non-processed surface of the connecting rod, and the V-shaped clamping surface can ensure that the connecting rod is fully constrained in the plane, improve the processing accuracy, prevent the accumulation of processing errors, realize the rapid placement of the workpiece, and has the characteristics of convenient clamping and high efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 It is a structural schematic diagram of the utility model.

[0011] Figure 2 for Figure 1 Schematic diagram of the top view structure.

[0012] Figure 3 It is a structural diagram of the activity block.

[0013] In the figure: 1. base, 2. positioning block, 3. movable block, 4. guide bar, 5. large end support plate, 6. small end support plate, 7. fixing production, 8. threaded bushing, 9. push screw, 10. T-slot bolt, 11. hexagonal nut, 12. lifting ring, 13. connecting rod. DETAILED DESCRIPTION

[0014] The utility model is further described below in conjunction with the accompanying drawings.

[0015] like Figure 1 , 2 As shown, a milling plane fixture for connecting rod plane processing, the base of the milling plane fixture is fixed with a positioning block 2 corresponding to the large head hole on the connecting rod and a movable block 3 that can move horizontally relative to the base; Figure 3 The end of the movable block facing the positioning block has a V-shaped groove for cooperating with the small head end of the connecting rod; the positioning block and the movable block constitute a structure for positioning the connecting rod from both ends; a pushing screw 9 is provided corresponding to the movable block 3 to push it to move horizontally relative to the base; one end of the pushing screw 9 is provided with a handle, and the other end is connected to the movable block 3; a threaded bushing 8 is sleeved on the pushing screw 9; when the threaded bushing 8 is worn when the pushing screw 9 is rotated, only the threaded bushing 8 needs to be replaced, which is convenient and repairable; the threaded bushing 8 is fixed to the base 1 through a fixed base 7; the base 1 is also provided with a large end support block 5 and a small end support block 6 for supporting the connecting rod.

[0016] The base is fixed with guide bars 4 cooperating with the movable block; the guide bars 4 are two located on both sides of the movable block.

[0017] The base is also provided with a T-slot bolt 10 and a lifting ring 12, which is convenient for placing the fixture on the milling machine.

[0018] First, place the milling plane clamp on the milling machine workbench through the lifting ring 12, and place the milling plane clamp with T-slot bolts 10 and hexagonal nuts 11, and tighten them after alignment; then place the connecting rod 13 so that the large and small head end faces of the connecting rod 13 are in contact with the large-end support block 5 and the small-end support block 6; rotate the pushing screw 9, and under the constraint of the guide bars 4 on both sides of the movable block 3, the pushing screw 9 drives the movable block 3 to move on the base 1 along the direction of the fixed positioning block 2; when the connecting rod 13 is placed, the movable block 3 first contacts the outer shape of the small end of the connecting rod 13, and when the pushing screw 9 continues to be rotated, the movable block 3 drives the connecting rod 13 to continue to move in the direction of the fixed positioning block 2 until the positioning block 2 contacts the large end hole of the connecting rod 13, thereby clamping the two ends of the connecting rod 13. During this process, a small hammer can be used to gently tap the connecting rod 13 so that the end faces of the large and small heads of the connecting rod 13 are in full contact with the large end support block 5 and the small end support block 6. This can not only support and position the large and small ends of the connecting rod 13, but also keep the placed connecting rod 13 level. Through the above operations, the non-machined surface of the connecting rod 13 can be clamped and positioned, and the V-shaped clamping surface of the structure 3 composed of the positioning blocks and movable blocks for positioning the connecting rod from both ends can ensure that the connecting rod 13 is completely constrained in the plane, thereby improving the machining accuracy and preventing the accumulation of machining errors.

Claims

1. A milling fixture for connecting rod plane machining, characterized in that: A positioning block corresponding to the large head hole on the connecting rod and a movable block that can move horizontally relative to the base are fixed on the base of the milling plane fixture; the end of the movable block facing the positioning block has a V-shaped groove for cooperating with the small head end of the connecting rod; the positioning block and the movable block constitute a structure for positioning the connecting rod from both ends; a pushing screw is provided corresponding to the movable block to push it to move horizontally relative to the base; a handle is provided at one end of the pushing screw, and the other end is connected to the movable block; a threaded bushing fixed to the base is sleeved on the pushing screw; the base is also provided with a large end support block and a small end support block for supporting the connecting rod.

2. The milling fixture for connecting rod surface machining according to claim 1, characterized in that: A guide bar matched with the movable block is fixed on the base; the guide bars are two located on both sides of the movable block.

3. The milling fixture for connecting rod surface machining according to claim 1, characterized in that: The base is also provided with T-slot bolts and lifting rings.

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