Cylinder part finishing equipment and chemical milling sharp edge removing method

Abstract

The invention discloses barrel type part finishing equipment and a chemical milling sharp edge removing method, the barrel type part finishing equipment is provided with a material box, a rotating mechanism and a jacking sliding block assembly, the material box is filled with mixed grinding materials in a specific proportion, and the machining steps are as follows: during production preparation, the grinding materials and grinding liquid are added in the material box according to the proportion to be uniformly mixed; when parts are machined, feeding and clamping are conducted through the feeding and discharging mechanism, after equipment is started, the height of the jacking sliding block assembly is adjusted according to the diameter of a workpiece, the center shaft drives the workpiece to rotate, the material box swings synchronously, discharging is conducted after operation is finished, sharp edges can be machined into fillets of 0.1-0.4 mm after machining, and the situation that the parts lose efficacy due to stress concentration of the sharp edges in subsequent use of an engine is effectively avoided. And the quality requirement is met, and the reliability and safety of cylinder parts such as aero-engine cases are improved.

Description

Technical Field

[0001] The invention relates to the field of mechanical manufacturing, in particular to a method for removing milling sharp edges of titanium alloy cylinder parts. Background Art

[0002] At present, in the manufacturing process of some domestic aircraft engine casing parts, chemical milling structure is used. However, after chemical milling, sharp edges often appear at the edges of the dimensions formed by chemical milling. The existence of such sharp edges is very likely to cause stress concentration in the subsequent use of the aircraft engine. Once stress concentration occurs, the risk of part failure will increase. Summary of the invention

[0003] In order to solve the above problems, the present invention discloses a finishing device for cylindrical parts and a method for removing sharp edges by chemical milling.

[0004] The specific technical solutions are as follows:

[0005] A finishing device for cylindrical parts is provided, wherein a material box is provided, abrasive is contained in the material box, a rotating mechanism is provided above the material box, the rotating mechanism includes brackets provided on both sides of the material box, a central axis is provided between the brackets at both ends, the central axis is driven by a motor, the motor is connected to the bracket, a workpiece is placed on the central axis and connected to the central axis, and the axial ends of the workpiece are clamped by tooling.

[0006] A lifting slider assembly is also arranged at the bottom of the material box.

[0007] A method for removing the milling edge of a cylindrical part is completed by the above-mentioned cylindrical part finishing equipment, and is characterized by comprising the following steps:

[0008] Step 1) Production preparation

[0009] Add 4mm×4mm oblique triangle and 2mm spherical abrasives and a certain amount of grinding liquid into the material box in a ratio of 1:1 and mix them evenly;

[0010] Step 2) Parts processing

[0011] a) The workpiece is sent to the rotating mechanism of the equipment through the loading and unloading mechanism, and the equipment automatically clamps the workpiece;

[0012] b) Start the finishing equipment, the equipment enters the automatic control program, and the lifting slider assembly automatically adjusts the height position according to the workpiece diameter parameters to meet the process depth of the workpiece in the material box;

[0013] c) The central axis drives the workpiece to rotate;

[0014] d) After the equipment stops working after reaching the running time, the parts are taken out through the loading and unloading mechanism.

[0015] The rotation axis of the rotating mechanism in step 2 coincides with the rotation axis of the workpiece.

[0016] In step 2: the rotation reversing cycle of the workpiece is 30 minutes / time.

[0017] In step 2: the workpiece is rotated forward and reversely through the rotating mechanism, and the part speed is 20 rpm.

[0018] The advantages of the present invention are as follows: the method is used to remove the sharp edge by chemical milling, and the sharp edge can be effectively processed into a fillet of 0.1-0.4 mm, meeting the quality requirements of customers and avoiding the failure of parts caused by the stress concentration on the sharp edge during subsequent flight use. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall structure of the device of the present invention. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0021] A finishing device for cylindrical parts is provided, wherein a material box 1 is provided, wherein abrasive is contained in the material box 1, and a rotating mechanism 2 is provided above the material box 1. The rotating mechanism includes brackets 21 provided on both sides of the material box, and a central axis 22 is provided between the brackets at both ends. The central axis 22 is driven by a motor 23, and the motor 23 is connected to the bracket 32. A workpiece 3 is placed on the central axis 22 and connected to the central axis 22, and the axial ends of the workpiece 3 are clamped by tooling 4.

[0022] A lifting slider assembly 5 is also provided at the bottom of the material box 1 .

[0023] The working principle of the present invention is:

[0024] Equipment structure and coordinated operation

[0025] Overall equipment architecture

[0026] The core components of the equipment include material box, rotating mechanism and lifting slide assembly. The material box is used to hold abrasives and provide a grinding medium environment for removing sharp edges.

[0027] The rotating mechanism is arranged above the material box, and the central axis is supported by the brackets on both sides of the material box. The motor drives the central axis to rotate. The central axis serves as the driving component for the rotation of the workpiece to realize the rotation of the workpiece in the material box, and the axial ends of the workpiece are clamped on the central axis by tooling to ensure that the position of the workpiece is stable during the rotation process and the torque can be effectively transmitted.

[0028] The lifting slider assembly is located at the bottom of the material box. Its key function is to automatically adjust the height position according to different workpiece diameter parameters to accurately control the process depth of the workpiece in the material box (that is, the depth of the part immersed in the abrasive is 80-150mm), ensuring that the abrasive is in full contact with the milling edge of the part and produces effective friction.

[0029] Abrasive selection and configuration

[0030] The abrasive is a mixture of 4mm×4mm oblique triangle and 2mm spherical abrasive in a ratio of 1:1, and a certain amount of grinding fluid is added to mix evenly. The combination of abrasives of different shapes and sizes can form a multi-directional and multi-angle grinding effect when in contact with the sharp edge of the part, improving the efficiency and quality of sharp edge removal. The grinding fluid plays the role of lubrication, cooling and auxiliary grinding, which helps to improve the friction environment during the processing process and reduce the risk of abrasive wear and workpiece surface damage.

[0031] Parts processing principle

[0032] Loading and clamping

[0033] The titanium alloy cylinder parts to be processed are accurately delivered to the rotating mechanism of the equipment through the loading and unloading mechanism, and the equipment automatically clamps the workpiece. This process ensures that the position of the workpiece is fixed in the subsequent processing, and it cooperates closely with the rotating mechanism, and can stably accept the rotation and grinding action.

[0034] Rotation and swing coordination

[0035] After starting the finishing equipment, the central axis drives the workpiece to rotate under the drive of the motor, with a rotation speed of 10-30 revolutions per minute, and it will also rotate forward and reverse, with a forward and reverse switching cycle of 10-30 minutes per time. This rotation method causes the milled edge of the part to move relative to the abrasive in the material box, forming an all-round friction effect and removing the sharp edges from different directions.

[0036] At the same time, the material box vibrates at a frequency of 30-60 times / min. The vibration of the material box further increases the complexity and randomness of the relative movement between the abrasive and the sharp edge of the part, so that the sharp edge can be fully ground at all angles, improving the uniformity and thoroughness of the sharp edge removal, and effectively avoiding problems such as local residual sharp edges or over-grinding.

[0037] Process depth control and grinding effect

[0038] The lifting slider assembly adjusts its height in real time according to the diameter of the workpiece to ensure that the process depth of the workpiece in the material box is within the range of 80-150mm. The appropriate process depth allows the abrasive to fully wrap the sharp edge of the part, ensuring that the grinding pressure and friction are within a reasonable range, which is sufficient to remove the sharp edge without causing excessive damage to the part matrix, thereby processing the sharp edge into a 0.1-0.4mm fillet, meeting customer quality requirements, effectively avoiding part failure caused by stress concentration on the sharp edge, and ensuring the reliability and safety of the part in subsequent aircraft engine operation.

[0039] Cutting and finishing

[0040] When the equipment reaches the set time, it will automatically stop working. At this time, the finished parts will be taken out through the loading and unloading mechanism, completing the entire milling edge removal process. The equipment's automated control program ensures the precise execution and orderly connection of each processing step, improves processing efficiency and quality stability, and can achieve mass production and ensure product consistency.

[0041] Through the coordinated work of various equipment components and precisely controlled processing parameters, efficient and accurate removal of milled edges of titanium alloy cylinder parts is achieved, which solves the problems existing in the existing technology and improves the quality and performance of cylinder parts such as aircraft engine casing parts.

Claims

1. A finishing equipment for cylindrical parts, characterized in that: A material box is provided, and abrasive is contained in the material box. A rotating mechanism is provided above the material box, and the rotating mechanism includes brackets provided at both sides of the material box. A central axis is provided between the brackets at both ends. The central axis is driven by a motor, and the motor is connected to the bracket. A workpiece is placed on the central axis and connected to the central axis, and the axial ends of the workpiece are clamped by tooling.

2. The cylindrical parts finishing equipment according to claim 1 is characterized in that: A lifting slider assembly is also arranged at the bottom of the material box.

3. A method for removing the milling edge of a cylindrical part, which is completed using the cylindrical part finishing equipment according to claim 2, characterized in that: The steps include: Step 1) Production preparation Add 4mm×4mm oblique triangle and 2mm spherical abrasives and a certain amount of grinding liquid into the material box in a ratio of 1:1 and mix them evenly; Step 2) Parts processing a) The workpiece is sent to the rotating mechanism of the equipment through the loading and unloading mechanism, and the equipment automatically clamps the workpiece; b) Start the finishing equipment, the equipment enters the automatic control program, and the lifting slider assembly automatically adjusts the height position according to the workpiece diameter parameters to meet the process depth of the workpiece in the material box; c) The central axis drives the workpiece to rotate; d) After the equipment stops working after reaching the running time, the parts are taken out through the loading and unloading mechanism.

4. The method for removing the sharp edge of a cylindrical part according to claim 3 is characterized in that: The rotation axis of the rotating mechanism in step 2 coincides with the rotation axis of the workpiece.

5. The method for removing the sharp edge of a cylindrical part according to claim 3 is characterized in that In step 2: the rotation reversing cycle of the workpiece is 30 minutes / time.

6. The method for removing the milling edge of a cylindrical part according to claim 3 is characterized in that: In step 2: the workpiece is rotated forward and reversely by the rotating mechanism, and the part speed is 20 rpm.

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