Numerical control lathe machining tool for plunger sleeve of hydraulic motor of injection molding machine

Abstract

The utility model discloses a numerical control lathe machining tool for a plunger sleeve of a hydraulic motor of an injection molding machine. The numerical control lathe machining tool comprises a hydraulic three-jaw chuck body, a T-shaped block, hexagon socket cap screws, three jaws, a first clamping block, a second clamping block, a third clamping block and a cylindrical head positioning pin. The number of the three jaws is three, the three jaws are evenly distributed in the circumferential direction at 120 degrees, and the three jaws are fixed to the hydraulic three-jaw chuck body through T-shaped blocks and two hexagon socket cap screws respectively. The first clamping block, the second clamping block and the third clamping block are located on the corresponding three jaws through two cylindrical head locating pins respectively and then are continuously welded into a whole through peripheral corners, the three clamping blocks are concentric and make contact with the outer surface of a workpiece in a profiling mode, and the three clamping blocks are provided with limiting parts so as to conduct axial limiting on the workpiece. The plunger sleeve clamping and positioning tool is low in machining cost, convenient and efficient in machining operation and stable in machining quality, and solves the problems that an existing plunger sleeve is large in labor intensity, low in machining efficiency and unstable in machining quality during machining.

Description

Technical Field

[0001] The utility model relates to the technical field of tooling for processing special-shaped parts of mechanical equipment, in particular to a numerically controlled lathe processing tooling for a hydraulic motor plunger sleeve of an injection molding machine. Background Art

[0002] As an important component of the hydraulic motor of an injection molding machine, the plunger sleeve serves as a seal, buffer, and support. Due to the structural characteristics of the product, it needs to be clamped and fixed on the side during CNC lathe processing before the end face, outer circle, and inner hole processing are carried out. Due to the high processing precision of this part (requires inner hole cylindricity of 0.012 and circular runout of 0.08), if all dimensions cannot be clamped and processed in one go, it will be difficult to meet the required accuracy. However, due to the complex external structure, the existing ordinary three-jaw chuck is difficult to clamp, and the workpiece often slips due to the inability to clamp. There are also problems with positioning and clamping the workpiece during processing. As a result, the plunger sleeve processing efficiency is low, the labor intensity is high, the quality is unstable, and it cannot meet the assembly requirements. Summary of the Invention

[0003] The purpose of the utility model is to solve the problem of difficulty in clamping a plunger sleeve and to provide a CNC lathe processing tool for a hydraulic motor plunger sleeve of an injection molding machine, which has low processing cost, convenient and efficient processing operation and stable processing quality. By adopting the clamping and positioning tool, the problems of high labor intensity, low processing efficiency and unstable processing quality during the existing machining of the plunger sleeve are solved.

[0004] To achieve the above purpose, the CNC lathe processing tooling of the hydraulic motor plunger sleeve of the injection molding machine of the utility model includes a hydraulic three-jaw chuck body 1, a T-shaped block 2, a hexagonal cylindrical head screw 3, three jaws 4, No. 1 clamping block 5, No. 2 clamping block 6, No. 3 clamping block 7, and a cylindrical head locating pin 8; the three jaws 4 are provided with three, evenly distributed at 120° along the circumferential direction, and are respectively fixed to the hydraulic three-jaw chuck body 1 by two hexagonal cylindrical head screws 3 and a T-shaped block 2; the No. 1 clamping block 5, No. 2 clamping block 6, and No. 3 clamping block 7 are respectively positioned in their corresponding three jaws 4 by two cylindrical head locating pins 8, and then continuously welded into one through the four peripheral corners. The No. 1 clamping block 5, No. 2 clamping block 6, and No. 3 clamping block 7 are concentric and all contact with the outer surface of the workpiece 9 in a contoured manner. The three clamping blocks are all provided with limit positions to limit the workpiece 9 axially.

[0005] The No. 1 clamping block 5, the No. 2 clamping block 6 and the No. 3 clamping block 7 are subjected to quenching and tempering treatment and have a hardness between 20HRC and 30HRC.

[0006] When processing the workpiece, first position the three shaped clamping blocks on the corresponding three jaws 4 with cylindrical pin holes through the cylindrical head positioning pins 8, and then weld and polish them around them. Then install the three jaws 4 on the hydraulic chuck of the machine tool through the T-shaped block 2 to position and clamp the workpiece 9, so that the end face, outer circle and inner hole of the workpiece 9 can be processed in turn.

[0007] The CNC lathe processing tooling of the hydraulic motor plunger sleeve of the injection molding machine of the utility model has the following technical features and beneficial effects:

[0008] 1. Clamp No. 1 5, clamp No. 2 6, clamp No. 3 7 are welded together on all sides after profiling the outer surface of the special-shaped workpiece 9 and positioning them with cylindrical head positioning pins 8, so that the clamping and positioning of the workpiece are more accurate and firm and reliable, and the eccentricity of the processed hole caused by the size of the blank will not be scrapped.

[0009] 2. The contoured tooling makes the operation easier, reduces the processing difficulty and reduces the labor intensity, eliminates the cumulative error caused by multiple processing steps and improves the processing efficiency.

[0010] 3. The tooling has a simple and compact structure, low manufacturing and maintenance costs, and is reliable to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 The utility model is a three-dimensional structural diagram of a CNC lathe processing tool for a hydraulic motor plunger sleeve of an injection molding machine.

[0012] Figure 2 The utility model is a schematic diagram of a top view of a CNC lathe processing tool for a hydraulic motor plunger sleeve of an injection molding machine.

[0013] Figure 3 yes Figure 2 AA cross-sectional structural diagram.

[0014] Figure 4 yes Figure 2 Schematic diagram of the BB cross-sectional structure.

[0015] Figure numerals: hydraulic three-jaw chuck body 1, T-shaped block 2, hexagon socket head screw 3, three jaws 4, clamping block No. 1 5, clamping block No. 2 6, clamping block No. 3 7, cylindrical head locating pin 8 and special-shaped workpiece 9. DETAILED DESCRIPTION

[0016] The specific implementation of the CNC lathe processing tooling for the hydraulic motor plunger sleeve of the injection molding machine of the utility model is further described in detail below with reference to the accompanying drawings.

[0017] Figure 1-Figure 4As shown, the CNC lathe processing tooling of the hydraulic motor plunger sleeve of the injection molding machine of the utility model includes a hydraulic three-jaw chuck body 1, a T-shaped block 2, a hexagon socket head screw 3, a three-jaw 4, a No. 1 clamping block 5, a No. 2 clamping block 6, a No. 3 clamping block 7, and a cylindrical head locating pin 8; the three-jaw 4 is provided with three, which are evenly distributed at 120° along the circumferential direction and are fixed to the hydraulic three-jaw chuck body 1 by two hexagon socket head screws 3 and a T-shaped block 2 respectively; the No. 1 clamping block 5, the No. 2 clamping block 6, and the No. 3 clamping block 7 are respectively positioned in their corresponding three-jaw 4 by two cylindrical head locating pins 8, and then continuously welded into one through the four peripheral corners. The No. 1 clamping block 5, the No. 2 clamping block 6, and the No. 3 clamping block 7 are concentric and all contact with the outer surface of the workpiece 9 in a contoured manner. The three clamping blocks are all provided with limit stops to limit the workpiece 9 axially, and are all quenched and tempered and have a hardness between 20HRC and 30HRC.

[0018] The specific processing and positioning steps of the CNC lathe processing tooling for the hydraulic motor plunger sleeve of the above-mentioned injection molding machine are as follows:

[0019] Step 1: Clamp the 10-inch hydraulic three-jaw chuck body 1 on the CNC lathe and find the rotation center (circular runout is about 0.01mm, end face runout is about 0.01mm);

[0020] Step 2: Clamp No. 1 5, Clamp No. 2 6, and Clamp No. 3 7 are positioned on the three claws 4 by two cylindrical head positioning pins 8, and then the four peripheral corners are continuously welded to fix them into one. When installing, pay attention to that clamp No. 1 5, clamp No. 2 6, and clamp No. 3 7 correspond to their respective three claws 4;

[0021] Step 3: The three three-jaw chucks 4 are fixed to the 10-inch hydraulic three-jaw chuck body 1 by two hexagon socket head screws 3 and a T-shaped block. When installing, the chuck numbers 1, 2, and 3 correspond to the three-jaw numbers 1, 2, and 3 respectively;

[0022] Step 3. Adjust the three three-claws 4 to the appropriate position and tighten the two hexagon socket head screws 3 respectively. Place the workpiece 9 into the No. 1 clamp 5, No. 2 clamp 6, and No. 3 clamp 7. After ensuring that there are no abnormalities in the limiting, positioning, and clamping operations of the workpiece 9, tighten the hexagon socket head screws 3 respectively and the workpiece 9 can be processed normally.

Claims

1. A CNC lathe processing tool for the hydraulic motor plunger sleeve of an injection molding machine, characterized by: The invention comprises a hydraulic three-jaw chuck body (1), a T-shaped block (2), a hexagon socket head screw (3), three jaws (4), a No. 1 clamping block (5), a No. 2 clamping block (6), a No. 3 clamping block (7), and a cylindrical head positioning pin (8); the three jaws (4) are provided with three, evenly distributed at 120 degrees along the circumference, and are respectively fixed on the hydraulic three-jaw chuck body (1) by two hexagon socket head screws (3) and a T-shaped block (2); the No. 1 clamping block (5), the No. 2 clamping block (6), and the No. 3 clamping block (7) are respectively positioned on the corresponding three jaws (4) by two cylindrical head positioning pins (8), and then continuously welded into one through four peripheral corners; the No. 1 clamping block (5), the No. 2 clamping block (6), and the No. 3 clamping block (7) are concentric and all contact with the outer surface of the workpiece (9); and the three clamping blocks are all provided with limiters to limit the workpiece (9) axially.

2. The CNC lathe processing tool for the hydraulic motor plunger sleeve of the injection molding machine as claimed in claim 1, characterized in that: The No. 1 clamping block (5), the No. 2 clamping block (6) and the No. 3 clamping block (7) are subjected to quenching and tempering treatment and have a hardness between 20HRC and 30HRC.

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