Plane calibration clamp for reinforcing ring surface of rear axle housing of machining center

Abstract

A machining center rear axle housing reinforcing ring surface plane calibration clamp comprises a main shaft, the main shaft penetrates through an upper plate and a lower plate, the upper section of the main shaft extends out of the upper plate, the middle section of the main shaft is connected with the upper plate, the lower end of the main shaft penetrates through the lower plate and is connected with the lower plate through a first linear bearing, and guide shafts sleeved with springs are located on the two sides of the main shaft. The lower end of the guide shaft is connected with the lower plate, the upper end of the guide shaft is connected with the upper plate through a second linear bearing, the upper end of the spring makes contact with the lower surface of the second linear bearing, and the lower end of the spring makes contact with the upper surface of the lower plate. A limiting structure is arranged at the top end of the guide shaft, and a cutter handle connecting structure is arranged on the main shaft extending section.

Description

Technical Field

[0001] The utility model belongs to the field of automobile rear axle housing manufacturing, in particular to a plane calibration fixture for a rear axle housing reinforcement ring surface of a machining center. Background Art

[0002] Vehicles with high load-bearing and driving power requirements, such as off-road vehicles, high-end SUVs, pickup trucks, and commercial vehicles, often feature rear axle housings. These housings vary in specifications and are produced in relatively small quantities. Currently, the most common rear axle housings have a center height between 35mm and 50.5mm, and a flange diameter between 145mm and 228mm. These sizes vary widely.

[0003] Existing technology calibrates the plane of the reinforcement ring of the rear axle housing. This requires plane calibration during milling, boring, drilling, chamfering, tapping, and deburring processes. Specialized processing equipment is used to process the rear axle housing, but this equipment is limited in that it can only produce specific types of products. Furthermore, a dedicated hydraulic clamping mechanism is required for plane calibration during processing. However, this specialized clamp cannot accommodate rear axle housings of varying specifications. Therefore, when producing rear axle housings of varying specifications, different specialized hydraulic clamping mechanisms must be used depending on the specifications of the rear axle housing. During processing, the hydraulic clamping mechanism must be replaced, and each replacement takes approximately 30 minutes, resulting in low labor productivity. The specialized hydraulic clamping mechanism is also expensive to manufacture, costing approximately RMB 100,000 per pair. Furthermore, the specialized hydraulic clamping mechanism is complex in structure and operation, resulting in a high failure rate. Utility Model Content

[0004] The present invention addresses the problems of the prior art by providing a plane alignment fixture for the reinforced annular surface of a rear axle housing in a machining center. The fixture can be used for positioning and machining rear axle housings of varying sizes, resolving the need for different fixtures for machining different rear axle housings. Consequently, there is no need to replace the fixture when producing rear axle housings of varying sizes, significantly improving equipment efficiency and reducing production costs.

[0005] The technical solution of the present utility model is achieved as follows:

[0006] A plane calibration fixture for the reinforced annular surface of a rear axle housing of a machining center includes a main shaft, the main shaft passes through an upper plate and a lower plate, the upper section of the main shaft extends out of the upper plate, the middle section of the main shaft is connected to the upper plate, the lower end of the main shaft passes through the lower plate and is connected to the lower plate through a first linear bearing, a guide shaft with a spring is located on both sides of the main shaft, the lower end of the guide shaft is connected to the lower plate, and the upper end is connected to the upper plate through a second linear bearing, the upper end of the spring contacts the lower surface of the second linear bearing, and the lower end of the spring contacts the upper surface of the lower plate; the top end of the guide shaft is provided with a limiting structure, and the protruding section of the main shaft is provided with a tool handle connection structure.

[0007] Preferably, the main shaft is connected to the upper plate with screws or bolts; the bottom end of the guide shaft is connected to the lower plate with screws or bolts.

[0008] Preferably, the second linear bearing and the first linear bearing are flange-type linear bearings.

[0009] Preferably, the limiting structure is a limiting pad connected to the guide shaft through bolts.

[0010] Preferably, the tool handle connection structure is two grooves spaced apart at the upper end of the main shaft, with a flange provided between the two grooves.

[0011] Preferably, the upper plate and the lower plate are equal in length.

[0012] Preferably, the guide shafts are symmetrically arranged with the main axis as the symmetry line.

[0013] Preferably, the guide shaft is arranged parallel to the main shaft.

[0014] Preferably, a gasket is provided between the second linear bearing and the spring.

[0015] The fixture described in this utility model can be used to perform planar alignment on rear axle housings of varying sizes, avoiding the drawback of traditional clamping mechanisms that require customization based on rear axle housing dimensions. The fixture eliminates the need for fixture replacement when producing rear axle housings of varying sizes. During processing, the fixture can perform planar alignment on the rear axle housing flange. This utility model is applicable to over 200 rear axle housing specifications. This eliminates the need for fixture replacement, reducing the time required to replace the clamping mechanism from 30 minutes to 0 minutes, and increasing the planar alignment pass rate from 95% to 99%. This significantly reduces production costs, improves production efficiency, and overcomes the limitation of specialized processing equipment that is limited to producing specific product types. Furthermore, this utility model features a simple and rational structure, easy operation, and a low failure rate. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural diagram of the utility model;

[0017] Figure 2 It is a top view of the utility model;

[0018] Figure 3 It is a schematic diagram of the use state of the utility model. DETAILED DESCRIPTION

[0019] See also Figures 1 to 3The machining center rear axle housing reinforced annular surface plane calibration fixture includes a spindle 1, which passes through an upper plate 2 and a lower plate 3, the upper and lower plates 2 and 3 being of equal length. The upper section of the spindle 1 extends out of the upper plate 2, and the middle section of the spindle 1 is connected to the upper plate 2. The spindle 1 and the upper plate 2 are connected by screws or bolts. The lower end of the spindle 1 passes through the lower plate 3 and is connected to the lower plate 3 via a first linear bearing 4, which is a flange-type linear bearing and is connected to the lower plate 3 via a flange. Guide shafts 6 with springs 5 ​​are located on both sides of the spindle 1, and the guide shafts 6 are symmetrically arranged about the spindle 1. The guide shafts 6 are arranged parallel to the spindle 1. The lower end of the guide shaft 6 is connected to the lower plate 3, and the bottom end of the guide shaft 6 is connected to the lower plate 3 by screws or bolts. The upper end is connected to the upper plate 2 via a second linear bearing 7, which is a flange-type linear bearing and is connected to the upper plate 2 via a flange. The upper end of the spring 5 contacts the lower surface of the second linear bearing 7. A gasket 12 is provided between the second linear bearing 7 and the spring 5 to prevent the spring 5 from wearing the lower surface of the second linear bearing 7. The lower end of the spring 5 contacts the upper surface of the lower plate 3. The top end of the guide shaft 6 is provided with a limiting structure 8, which is a limiting pad connected to the guide shaft 6 via bolts. The extended section of the spindle 1 is provided with a tool handle connection structure 9 for connecting to the spindle of the machining center. The tool handle connection structure 9 consists of two grooves 10 spaced apart at the upper end of the spindle 1, with a flange 11 provided between the two grooves 10.

[0020] In this embodiment, the spindle 1 is 170 mm long; the groove 10 and flange 11 are 15 mm long; the toolholder connection structure 9 is 4 mm from the top of the spindle 1; the upper plate is 250 mm long, 40 mm wide, and 18 mm high; the lower plate is 250 mm long, 40 mm wide, and 18 mm high; the toolholder connection structure 9 is compatible with a BT50 toolholder. The toolholder connection structure 9 is positioned at a specific circumferential angle on the spindle 1. When the fixture is in use, the lower plate 3 is perpendicular to the X-axis of the machining center.

[0021] To use, connect this plane calibration fixture to the BT50 toolholder via the toolholder connection structure 9 and install it in the tool magazine of the machining center. Enter the tool change command through the machining center's program control center to call up the fixture. Enter the M19 spindle orientation command through the machining center's program control center to position the fixture's lower plate 3 perpendicular to the rear axle housing's axial direction and ensure alignment with the center of the rear axle housing reinforcement ring. Enter the G00 / G01 program command in the Z direction through the machining center's program control center to drive the fixture downward. Using the spring force, the lower plate 3 performs plane calibration against the rear axle housing reinforcement ring. At this point, the spindle 1 is perpendicular to the rear axle housing reinforcement ring, completing the plane calibration operation.

[0022] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications made to the present invention by those skilled in the art without departing from the spirit of the present invention shall fall within the scope of protection of the present invention.

Claims

1. A plane calibration fixture for the reinforced annular surface of a rear axle housing of a machining center, characterized by: The invention comprises a main shaft (1), wherein the main shaft (1) passes through the upper plate (2) and the lower plate (3), the upper section of the main shaft (1) extends out of the upper plate (2), the middle section of the main shaft (1) is connected to the upper plate (2), the lower end of the main shaft (1) passes through the lower plate (3) and is connected to the lower plate (3) through a first linear bearing (4), a guide shaft (6) with a spring (5) is located on both sides of the main shaft (1), the lower end of the guide shaft (6) is connected to the lower plate (3), and the upper end is connected to the upper plate (2) through a second linear bearing (7), the upper end of the spring (5) contacts the lower surface of the second linear bearing (7), and the lower end of the spring (5) contacts the upper surface of the lower plate (3); the top end of the guide shaft (6) is provided with a limiting structure (8), and the protruding section of the main shaft (1) is provided with a tool handle connecting structure (9).

2. The rear axle housing reinforcement ring surface plane calibration fixture according to claim 1, characterized in that: The main shaft (1) is connected to the upper plate (2) by screws or bolts; the bottom end of the guide shaft (6) is connected to the lower plate (3) by screws or bolts.

3. The rear axle housing reinforcement ring surface plane calibration fixture according to claim 1, characterized in that: The second linear bearing (7) and the first linear bearing (4) are flange-type linear bearings.

4. The rear axle housing reinforcement ring surface plane calibration fixture according to claim 1, characterized in that: The limiting structure (8) is a limiting pad connected to the guide shaft (6) via bolts.

5. The rear axle housing reinforcement ring surface plane calibration fixture according to claim 1, characterized in that: The tool handle connection structure (9) comprises two grooves (10) spaced apart at the upper end of the main shaft (1), with a flange (11) provided between the two grooves (10).

6. The rear axle housing reinforcement ring surface plane calibration fixture according to claim 1, characterized in that: The upper plate (2) and the lower plate (3) are of equal length.

7. The rear axle housing reinforcement ring surface plane calibration fixture according to claim 1, characterized in that: The guide shaft (6) is symmetrically arranged with the main shaft (1) as a symmetry line.

8. The rear axle housing reinforcement ring surface plane calibration fixture according to claim 1, characterized in that: The guide shaft (6) is arranged parallel to the main shaft (1).

9. The rear axle housing reinforcement ring surface plane calibration fixture according to claim 1, characterized in that: A gasket (12) is provided between the second linear bearing (7) and the spring (5).

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