CN203918129U - A kind of Gear Milling fixture of steering rack - Google Patents

Abstract

The utility model discloses a kind of Gear Milling fixture of steering rack, the clamp bottom board that comprises diamond structure, described clamp bottom board is provided with the screwed hole in the equally distributed tape guide of two rows hole, each screwed hole is equipped with respectively pressing plate by housing screw, steering rack to be processed is installed between pressing plate and clamp bottom board, steering rack back to front is closely arranged in clamp bottom board plane, add man-hour, first steering rack back to front to be processed is closely arranged in clamp bottom board plane, the straight end end face of steering rack is close to the limited post cylindrical of pressing plate, then by rotating housing screw, with pressing plate, compress steering rack, can carry out Milling Process.

Description

Milling jig for steering rack

technical field

The utility model relates to a jig for milling teeth of rack parts, in particular to a jig for milling teeth of steering rack parts used in a rack and pinion steering gear assembly, and belongs to the technical field of mechanical manufacturing.

Background technique

At present, the milling processing of the steering rack parts for the rack and pinion steering gear assembly is generally carried out on the horizontal milling machine XK6132 with forming tools. The current milling fixtures generally clamp and process 4-8 pieces each time. When the tool has a long empty travel time, the non-processing time is long, and the frequent loading and unloading of workpieces leads to low processing efficiency of workpieces, which seriously restricts production.

Utility model content

The problem to be solved by this utility model is to provide a kind of fast clamping during processing, which can process as many workpieces as possible at one time to make the empty stroke the shortest, can make full use of the working stroke of the horizontal milling machine XK6132, and can meet the processing size of the workpiece at the same time. Gear milling fixtures for steering rack parts and shape and position tolerance requirements.

In order to solve the above problems, the utility model adopts the following technical solutions:

A gear milling fixture for steering racks, comprising a rhombus-shaped fixture bottom plate, two rows of uniformly distributed threaded holes with guide holes are arranged on the fixture bottom plate, each threaded hole is respectively equipped with a pressure plate through a compression screw, A steering rack to be processed is installed between the pressing plate and the fixture base plate, and the steering racks are arranged upside down and closely arranged on the plane of the fixture base plate.

Below is the further optimization of the above-mentioned scheme in the utility model:

Further optimization: In order to ensure the convenience of loading and unloading the steering rack before and after processing, a return spring is installed between the bottom of the guide hole on the bottom plate of the fixture and the pressure plate.

Further optimization: the lower part of the pressure plate is processed with a guide column, and the position near the lower end of the outer circumference of the guide column has a limit column that can compress the return spring.

The radial size and shape and position tolerance requirements of the milling teeth of the steering rack can be guaranteed by borrowing the small clearance fit between the outer circle of the guide column of the pressure plate and the guide hole of the bottom plate of the fixture;

When processing, first turn the steering rack to be processed upside down and arrange it closely on the plane of the fixture bottom plate. The straight end face of the steering rack is close to the outer circle of the limit column of the pressure plate, and then press the steering gear with the pressure plate by turning the compression screw. strips for milling.

The utility model adopts the above-mentioned scheme, the clamping is fast and reliable during processing, and 25 pieces can be processed in one clamping. The tight arrangement of the steering rack makes the cutting time and space travel of the milling machine tool the shortest, and fully utilizes the working stroke of the horizontal milling machine XK6132. At the same time, it can meet the processing size and shape and position tolerance requirements of the steering rack, greatly improving the work efficiency.

Below in conjunction with accompanying drawing and embodiment the utility model is further described.

Description of drawings

Accompanying drawing 1 is the clamp structure schematic diagram of the utility model embodiment;

Accompanying drawing 2 is A-A rotation sectional view of accompanying drawing 1;

Accompanying drawing 3 is the structure schematic diagram of the pressure plate in the utility model embodiment;

Accompanying drawing 4 is the top view of accompanying drawing 3;

In the figure: 1-fixture bottom plate; 2-steering rack; 3-pressing screw; 4-press plate; 5-return spring; 6-guiding column; 7-limiting column.

Detailed ways

Embodiments, as shown in Fig. 1 and Fig. 2, a gear milling fixture for steering racks, including a rhombus-shaped fixture base plate 1, the upper part of the fixture base plate 1 is processed with two rows of uniformly distributed threads with guide holes Each threaded hole is respectively equipped with a pressure plate 4 through a compression screw 3, which is used to compress the steering rack 2 to be processed, and the milling plane of the steering rack 2 is upside down and tightly arranged on the plane of the fixture bottom plate 1. The straight end face of the steering rack 2 abuts against the outer circle of the spacer column of the pressure plate 4 .

In order to ensure the convenience of loading and unloading the steering rack 2 before and after processing, a return spring 5 is installed between the guide hole on the fixture base plate 1 and the pressure plate 4 .

As shown in Figure 3 and Figure 4, the lower part of the pressure plate is processed with a limit column 7 for ensuring the axial position of the steering rack, the lower part of the pressure plate 4 is processed with a guide column 7, and the outer circumference of the guide column 7 is near the lower end. The limit post 6 of the return spring 5 can be compressed by the compression screw 3 .

During processing, install the fixture on the XK6132 horizontal milling machine, and then fix it after alignment. Firstly, turn the 25 pieces of steering rack 2 to be processed upside down and arrange them closely on the plane of the fixture bottom plate 1. The straight end shaft of the steering rack 2 The end face is pressed against the outer circle of the guide column of the pressing plate 4, and then the pressing plate 4 is used to press the steering rack 2 by rotating the pressing screw 3 to compress the return spring 5, and then milling can be carried out.

In the above embodiment, the specific structure of the fixture base plate 1 and the number of one-time processing of the steering rack 2 can be changed according to the drawings of the steering rack 2, the corresponding models of the processing equipment, etc., and are not limited to This example.

Claims (3)

1. A gear milling fixture for steering racks, comprising a rhombus-shaped fixture base plate (1), characterized in that: the fixture base plate (1) is provided with two rows of evenly distributed threaded holes with guide holes, each Each threaded hole is respectively equipped with a pressure plate (4) through the compression screw (3), and the steering rack (2) to be processed is installed between the pressure plate (4) and the bottom plate of the fixture (1), and the steering rack (2) is turned upside down tightly. Arranged on the plane of the fixture bottom plate (1). 2. A gear milling fixture for steering racks according to claim 1, characterized in that a return spring (5) is installed between the bottom of the guide hole on the bottom plate (1) of the fixture and the pressure plate (4). 3. A gear milling fixture for steering racks according to claim 2, characterized in that: the lower part of the pressure plate (4) is processed with a guide column (7), and the outer circumference of the guide column (7) is close to the lower end The position has a limit post (6) that can compress the return spring (5).