Annular casing part automatic machining clamp

Abstract

The invention discloses an automatic machining clamp for an annular casing part, which belongs to the field of mechanical numerical control machining and comprises a bottom plate, a production line tray, an automatic clamp centering structure, the annular casing part, a positioning circular ring and an automatic centering detection ring. The lower end face of the clamp is chamfered, the outer diameter of the lower end face of the clamp is smaller than the inner diameter of a tray hole, positioning is convenient, an annular case part is placed on the inner wall of the automatic centering structure of the clamp, centering is achieved through a spigot and the like, a pressing block is further arranged for pre-pressing, and an automatic centering detection ring is arranged on the spigot in a pressing and expanding mode and used for detection. The problems of machining coordinate system change and the like caused by center and angular position change of the clamp, pressure relief and compression failure of the hydraulic clamp, deviation of a centering mechanism, height difference of the clamp and temperature change can be effectively prevented, the use risk of the hydraulic clamp for the annular part is effectively controlled, and stable machining of the annular cartridge receiver part under the high-precision requirement is guaranteed; the production line processing stability is improved.

Description

Technical Field

[0001] This technology belongs to the field of mechanical CNC machining, specifically a clamping tool for annular parts. Background Art

[0002] For the processing of large, complex and precision parts, the full-process automatic processing mode is rarely used. The clamping of parts is basically done manually on the tooling pre-adjustment table. Even if a hydraulic clamp is used, it is inseparable from the intervention of personnel. There are many modes of automatic transportation systems using automated production lines, such as pallet positioning mode, fixture zero-point positioning mode, etc. Different transportation modes have different requirements for the positioning design of the fixture. When the fixture is directly connected to the pallet, in order to control the clamping risk, a reliable positioning method needs to be designed. Even if the pressure plates around are loose, there will be no major quality problems. In addition, the hydraulic clamps used in automated processing may have pressure relief problems due to various reasons, causing the clamping to fail and causing processing quality problems. In addition, some tooling with automatic centering structures and these centering mechanisms will have inaccurate centering problems after being used for a period of time, affecting the processing quality of parts. Only by effectively solving these problems can the long-term processing stability of the production line be guaranteed. Summary of the invention

[0003] In order to solve the above problems, the present invention discloses an automatic processing fixture for annular casing parts.

[0004] The specific technical solutions are as follows:

[0005] An automated processing fixture for annular casing parts comprises a base plate, a production line pallet is arranged below the base plate, an automatic centering structure of the fixture is arranged above the base plate, annular casing parts are arranged in the outer wall of the automatic centering structure of the fixture, the base plate adopts a center positioning method, a positioning ring is arranged at the center of the base plate, the positioning ring is screwed to a circular hole at the center of the base plate, and the production line pallet is provided with a pallet hole at a corresponding position of the positioning ring; an automatic centering detection ring is also arranged above the centering structure of the fixture.

[0006] The lower end surface of the positioning ring is chamfered, and the outer diameter of the positioning ring is smaller than the inner diameter of the tray hole of the production line tray.

[0007] The automatic centering structure of the clamp is provided with a stop, and the automatic centering detection ring is placed on the stop of the automatic centering structure by pressing and expanding.

[0008] A pressing block is arranged on the outer side of the automatic centering structure of the clamp, and the pressing block abuts against the end surface of the bottom of the annular casing part.

[0009] The advantages of the present invention are that it can prevent problems such as changes in the center and angular position of the clamp, failure of pressure relief and tightening during the hydraulic clamp processing, centering position offset of the centering mechanism, height differences of the clamp, and changes in the processing coordinate system caused by temperature changes, and can effectively control the risks of using hydraulic clamps for annular parts. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 It is a structural schematic diagram of the present invention;

[0011] Figure 2 It is a schematic diagram of the positions of the automatic centering detection ring and the automatic centering structure;

[0012] Figure 3 Schematic diagram of the position of the annular casing parts and the automatic centering structure. DETAILED DESCRIPTION

[0013] 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.

[0014] An annular casing part automated processing fixture is provided, comprising a base plate 1, a production line pallet 2 is provided below the base plate 1, a fixture automatic centering structure 3 is provided above the base plate 1, an annular casing part 4 is provided in the inner wall of the fixture automatic centering structure 3, the base plate adopts a center positioning method, a positioning ring 5 is provided at the center of the base plate 1, the positioning ring 5 is screwed to a circular hole at the center of the base plate 1, and the production line pallet 2 is provided with a pallet hole 21 at a corresponding position of the positioning ring; an automatic centering detection ring 6 is also provided above the fixture centering structure 3.

[0015] The lower end surface 51 of the positioning ring 5 is chamfered, and the outer diameter of the positioning ring 5 is smaller than the inner diameter of the tray hole of the production line tray.

[0016] The automatic centering structure of the clamp is provided with a stop 31 , and the automatic centering detection ring 6 is placed on the stop 31 of the automatic centering structure by pressing and expanding.

[0017] A pressure block 7 is arranged on the outer side of the automatic centering structure of the clamp, and the pressure block abuts against the end surface of the bottom of the annular casing part.

[0018] The working principle of the present invention is:

[0019] 1. Initial stage of positioning and clamping

[0020] The fixture is connected to the production line pallet through the bottom plate, and the positioning ring screwed at the center of the bottom plate plays a key role. Since the lower end face of the positioning ring is chamfered and the outer diameter is smaller than the inner diameter of the tray hole of the production line pallet, the positioning ring can smoothly enter the tray hole during installation. Its bevel guides the positioning ring to quickly find the correct position. After entering, the initial positioning is achieved by relying on the cooperation between the rear end of the positioning ring and the tray hole, ensuring the accurate position of the fixture on the tray and providing a stable foundation for subsequent processing.

[0021] The annular casing part is placed on one side of the outer wall of the automatic centering structure of the fixture. At this time, the annular casing part is roughly in the initial position to be processed, but it has not yet been completely accurately positioned and fixed.

[0022] Centering and initial tightening

[0023] The automatic centering structure of the fixture starts working, and its internal mechanical or hydraulic devices are activated to center the annular casing parts through structures such as the stopper, so that the center of the part coincides with the center of the machining coordinate system as much as possible to reduce position deviation.

[0024] At the same time, manual clamping is provided to prevent failure of hydraulic automatic clamping, and the clamping block abuts against the end face at the bottom of the annular casing part 4, exerting a certain pre-clamping force on the part to prevent excessive shaking of the part during the centering process.

[0025] Automatic centering detection and adjustment (regular operation)

[0026] The automatic centering detection ring is regularly placed on the stopper of the automatic centering structure by pressing and expanding. The pressing and expanding operation makes the automatic centering detection ring fit tightly on the stopper, simulating the clamping state of the actual part processing.

[0027] Check the circumferential runout of the automatic centering detection ring. If the runout does not meet the process requirements, it means that the centering position of the centering mechanism may be offset. At this time, the centering mechanism position needs to be adjusted, such as by fine-tuning the relevant mechanical structure or hydraulic parameters, to make the centering more accurate; if the deviation is large, the centering mechanism may be directly corrected by turning the circle to ensure that the centering mechanism maintains high-precision centering capabilities for a long time.

[0028] Final compaction and process assurance

[0029] After completing the centering test and adjustment (if necessary), the automatic clamping function of the fixture is activated to perform the final clamping operation on the annular casing parts to keep them stable during the processing. At the same time, even if the automatic clamping fails, the manual quick clamping devices (i.e., clamping blocks) evenly distributed on the fixture can be used as a backup means. The operator can manually operate these devices to apply additional clamping force to the parts to prevent the parts from loosening.

[0030] During the entire processing process, the center positioning design of the fixture base plate, the normal operation of the centering mechanism and the reliable clamping device work together to effectively prevent the processing coordinate system changes caused by factors such as changes in the fixture center and angular position, hydraulic fixture pressure relief, centering mechanism offset, fixture height differences and temperature changes. This ensures that the annular casing parts can be stably processed under high precision requirements, effectively controls the risks of using hydraulic fixtures for annular parts, and ensures the processing quality and stability of the production process.

Claims

1. An automatic processing fixture for annular casing parts, characterized in that: A base plate is provided, a production line pallet is provided below the base plate, an automatic centering structure of a fixture is provided above the base plate, an annular casing part is provided on the outer wall of the automatic centering structure of the fixture, the base plate adopts a center positioning method, a positioning ring is provided at the center of the base plate, the positioning ring is screwed to the circular hole at the center of the base plate, and a pallet hole is provided at the corresponding position of the positioning ring on the production line pallet; an automatic centering detection ring is also provided above the fixture centering structure.

2. The automatic processing fixture for annular casing parts according to claim 1 is characterized in that: The lower end surface of the positioning ring is chamfered, and the outer diameter of the positioning ring is smaller than the inner diameter of the tray hole of the production line tray.

3. The automatic processing fixture for annular casing parts according to claim 1 is characterized in that: The automatic centering structure of the clamp is provided with a stop, and the automatic centering detection ring is placed on the stop of the automatic centering structure by pressing and expanding.

4. The automatic processing fixture for annular casing parts according to claim 1 is characterized in that: A pressing block is arranged on the outer side of the automatic centering structure of the clamp, and the pressing block abuts against the end surface of the bottom of the annular casing part.

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