Involute internal spline high-precision quick alignment positioning device

Abstract

The application relates to the high-precision grinding processing technical field of screw elements of large extrusion granulator units, in particular to a quick alignment positioning device for involute spline screw elements. The quick alignment positioning device solves the relative position deviation between the inner spline and the outer profile milling type after processing caused by the matching gap in the original processing process, realizes the high-precision processing effect, ensures the processing precision of the screw element, and reduces the clamping positioning error problem in the screw element assembling process.

Description

Technical Field

[0001] This application relates to the field of high-precision grinding technology for screw components of large extrusion granulation units, and in particular to a rapid alignment and positioning device for involute spline screw components. Background Technology

[0002] High-precision involute spline screw component machining technology is a key domestic production project. There is a lack of industry experience and innovative methods in China to learn from. This is a crucial step to completely resolve the bottleneck and reliance on foreign technology for the machining of key core components in large-scale extrusion granulation units in the petrochemical industry. Currently, only four companies internationally possess the production capabilities for large-scale units such as the "SJSH-320, SJSH-350, and SJSH-380". As the core component of the entire mixing unit, the screw assembly currently faces the challenge that during the milling process of fixing the screw component using a mandrel tooling fixture, the clearance fit between the involute spline of the tooling fixture and the screw component (approximately 0.14mm) makes it difficult to achieve relative positional accuracy and stability. This results in varying degrees of relative positional deviation during the milling of the screw component's outer contour, ultimately leading to misalignment after screw assembly. Utility Model Content

[0003] In view of the problems faced, and in order to improve the stability and alignment accuracy of clamping by reducing the gap between the screw element and the tooling mandrel, a new screw element alignment device was developed.

[0004] According to one aspect of this application, a high-precision and rapid alignment and positioning device for involute internal splines is provided, comprising an upper pressure cover 1, a screw element positioning device 3, a device base 4, and fastening screws 6.

[0005] The screw element positioning device 3 is provided with a spline perpendicular to the axis. The spline is provided with 8 spring pin mounting holes. The spring pin mounting holes are arranged in groups of 2, one above the other, and each group of spring pin mounting holes is spaced 90° apart.

[0006] A spring pin is installed in the spring cap mounting hole;

[0007] The screw element is sleeved on the spline of the screw element positioning device 3 and positioned by a spring pin. The upper pressure cover 1 is locked by the fastening screw 6 to press the screw element.

[0008] Screw elements of different lengths can be fitted with a spacer sleeve under the upper cover 1.

[0009] The screw element positioning device 3 is mounted on the device base 4.

[0010] The spring pin consists of a spring cap 3.1, a spring 3.2, and a set screw 3.3;

[0011] The set screw 3.3 controls the maximum distance by which the spring cap 3.1 extends out of the spring pin mounting hole;

[0012] The spring 3.2 causes the spring cap 3.1 to retract and provides pressure to the positioning spring pin.

[0013] The spline shape of the screw element positioning device 3 matches the shape of the screw element spindle.

[0014] After the screw element to be processed is fitted into the spline of the screw element positioning device 3, the spring cap 3.1 extends in four directions to fill the gap between the spline and the screw element to be processed, so that the screw element to be processed is exactly in the center of the tooling fixture.

[0015] The specific usage method is as follows:

[0016] Step 1: Fix the screw element positioning device 3 onto the device base 4 with precision controlled within 0.01mm;

[0017] Step 2: Align the device base 4 and fix it on the machine tool worktable 5, with the accuracy precisely controlled within 0.01mm;

[0018] Step 3: Install the screw element 2 to be processed onto the screw element positioning device 3.

[0019] Step 4: Put the upper pressure cover 1 on and tighten it with the fastening screw 6.

[0020] Step 5: Process the cutting tool.

[0021] The beneficial effects of this application are: it solves the problem of relative position deviation between the inner spline and the outer contour milling shape after machining caused by the fit clearance in the original machining process, achieves high-precision machining effect, ensures the machining accuracy of screw components, and reduces the clamping and positioning error problem in the assembly process of screw components. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of a high-precision, rapid alignment and positioning device for involute splines.

[0023] Figure 2 A schematic diagram of the high-precision and rapid alignment and positioning device for the involute internal spline before it is fitted into the screw element to be processed.

[0024] Figure 3 This is a schematic diagram of a spring pin.

[0025] Among them, 1 is the upper pressure cap, 2 is the screw element to be processed, 3 is the screw element positioning device, 4 is the device base, fastening screw, 3.1 is the spring cap, 3.2 is the spring, and 3.3 is the set screw. Detailed Implementation

[0026] The present application is described in detail below with reference to the embodiments, but the present application is not limited to these embodiments.

[0027] Example 1

[0028] A high-precision and rapid alignment and positioning device for involute internal splines comprises an upper pressure cover 1, a screw element positioning device 3, a device base 4, and fastening screws 6.

[0029] The screw element positioning device 3 is provided with a spline perpendicular to the axis. The spline is provided with 8 spring pin mounting holes. The spring pin mounting holes are arranged in groups of 2, one above the other, and each group of spring pin mounting holes is spaced 90° apart.

[0030] A spring pin is installed in the spring cap mounting hole;

[0031] The screw element is sleeved on the spline of the screw element positioning device 3 and positioned by a spring pin. The upper pressure cover 1 is locked by the fastening screw 6 to press the screw element.

[0032] Screw elements of different lengths can be fitted with a spacer sleeve under the upper cover 1.

[0033] The screw element positioning device 3 is mounted on the device base 4.

[0034] The spring pin consists of a spring cap 3.1, a spring 3.2, and a set screw 3.3;

[0035] The set screw 3.3 controls the maximum distance by which the spring cap 3.1 extends out of the spring pin mounting hole;

[0036] The spring 3.2 causes the spring cap 3.1 to retract and provides pressure to the positioning spring pin.

[0037] The spline shape of the screw element positioning device 3 matches the shape of the screw element spindle.

[0038] After the screw element to be processed is fitted into the spline of the screw element positioning device 3, the spring cap 3.1 extends in four directions to fill the gap between the spline and the screw element to be processed, so that the screw element to be processed is exactly in the center of the tooling fixture.

[0039] The specific usage method is as follows:

[0040] Step 1: Fix the screw element positioning device 3 onto the device base 4 with precision controlled within 0.01mm;

[0041] Step 2: Align the device base 4 and fix it on the machine tool worktable 5, with the accuracy precisely controlled within 0.01mm;

[0042] Step 3: Install the screw element 2 to be processed onto the screw element positioning device 3.

[0043] Step 4: Put the upper pressure cover 1 on and tighten it with the fastening screw 6.

[0044] Step 5: Process the cutting tool.

[0045] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any modifications or substitutions made by those skilled in the art within the scope of the technology disclosed in this application should be covered within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A high-precision, rapid alignment and positioning device for involute internal splines, characterized in that, It consists of an upper pressure cap (1), a screw element positioning device (3), a device base (4), and fastening screws (6); The screw element positioning device (3) is provided with a spline perpendicular to the axis. The spline is provided with 8 spring pin mounting holes. The spring pin mounting holes are arranged in groups of 2, one above the other, and each group of spring pin mounting holes is spaced 90° apart. A spring pin is installed in the spring cap mounting hole; The screw element is fitted onto the spline of the screw element positioning device (3) and positioned by a spring pin. The upper pressure cover (1) is locked by a fastening screw (6) to press the screw element. The screw element positioning device (3) is mounted on the device base (4).

2. The high-precision and rapid alignment and positioning device for involute internal splines according to claim 1, characterized in that, The spring pin consists of a spring cap (3.1), a spring (3.2), and a set screw (3.3); The set screw (3.3) controls the maximum distance by which the spring cap (3.1) extends out of the spring pin mounting hole; The spring (3.2) causes the spring cap (3.1) to retract and provides pressure for the positioning spring pin.

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