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CN-121797685-B - Deburring process for pps line needle jig plate

CN121797685BCN 121797685 BCN121797685 BCN 121797685BCN-121797685-B

Abstract

The invention discloses a pps line needle jig plate deburring process, and relates to the field of PCB test jig manufacturing. The technology adopts plasma to remove burrs on pps plates, utilizes physical bombardment and chemical reaction of high-activity particles in the plasma and the surface of the materials, effectively and accurately removes burrs based on the tip effect and the specific surface area difference of the burrs, adopts high-density arrangement to form high-density ion adsorbers at the position of holes by densely arranging the reinforced ion adsorbers on cathode substrates, utilizes the cathode self-bias effect to enable positive ions in the plasma to gather and bombard plate areas, adds a visual detection scheme and a microneedle plasma generator for burrs which are difficult to remove, realizes point-to-point deburring, further achieves the deburring technology in a refined mode, and is a new material detection and standardized treatment means.

Inventors

  • GUO HONGJIAN
  • CHEN JINBO

Assignees

  • 珠海拓优电子有限公司

Dates

Publication Date
20260508
Application Date
20260306

Claims (7)

  1. 1. The utility model provides a pps line needle tool panel deburring process which characterized in that includes the following steps: s1, loading clamping and internal environment adjustment; S2, performing global treatment on the first surface, and bombarding the plate through a plasma generation module to enable the plate to receive single-side irradiation of plasma; S3, detecting and judging, performing preliminary scanning by adopting a visual detection scheme, and if the side is free of burrs, entering the next step; s4, local strengthening treatment, namely if the fact that the plate is locally residual is recognized, moving the plate to enable the area with burrs to be close to a plasma generating source, and carrying out local fine treatment on the burrs; S5, performing global treatment on the second surface, turning over the plate, and repeating the operations of the steps S2-S4, so that the pps plate is subjected to standardized treatment and detection in the treatment process; S6, releasing the internal environment and blanking; the plate is clamped on a cathode substrate, the cathode substrate is densely provided with reinforced ion absorbers in an array manner, and the reinforced ion absorbers are densely arranged at the position of the plate openings to form high-density ion absorbers; The plasma generation module is generated by adopting a matrix plasma generator, and is provided with a microneedle plasma generator, and the microneedle plasma generator is used for carrying out fixed-point plasma bombardment in the S4 step; The reinforced ion absorber adopts high-purity graphite or copper-tungsten alloy, a concave position is formed by drilling on a cathode substrate, the reinforced ion absorber is welded and fixed in the concave position by adopting a brazing process, then conductive silver colloid is coated on the surface, and the top of the cathode substrate is polished after solidification, so that the reinforced ion absorber and the surface of the cathode substrate are in the same horizontal plane, and the reinforced ion absorber and the concave position are tightly attached without gaps; In the step S1, fixing the PPS plate subjected to drilling in a preset position in a vacuum chamber, closing a chamber door, pumping the interior of the vacuum chamber to a preset vacuum degree, and then introducing process gas with a preset flow; In the step S2, a uniform plasma is generated in the vacuum chamber by starting the plasma generating module, wherein: The matrix type plasma generator adopts a pulse mode, the pulse frequency is 1-10kHz, the duty ratio is 10-50%, so that the heat on the surface of the plate is emitted during the pulse interval, the overall heat effect is reduced, and the deformation and performance reduction of the PPS material due to overheating are avoided; The micro-needle plasma generator adopts 80-120w medium power, the processing time is less than or equal to 30s, and the micro-needle plasma generator adopts continuous pulse type, and the burrs are eliminated rapidly and high-energy through point-to-point.
  2. 2. The pps line needle jig plate deburring process according to claim 1, wherein the reinforcing ion adsorbent is arranged on the surface of the cathode substrate in a bilateral symmetry manner, so that the other side of the surface opening position of the plate can be opposite to the high-density ion adsorbent after the plate is turned over in the two-sided treatment.
  3. 3. The pps line needle jig panel deburring process of claim 2, wherein the process gas comprises oxygen and/or argon.
  4. 4. The pps line needle jig plate deburring process according to claim 3, wherein the process gas is prepared by adjusting the mixing ratio of oxygen and argon, wherein the oxygen content is 15%, and the argon content is 85%.
  5. 5. The pps line needle jig plate deburring process according to claim 3, wherein in step S3, the visual inspection scheme is to assemble a high-precision optical pickup module on the inner side wall of the vacuum chamber, observe the deburring situation on the plate surface by the visual scheme through the optical pickup module, and the optical pickup module provides visual positioning for the local strengthening treatment of step S4, so as to ensure that the microneedle plasma generator precisely acts on the deburring-free area.
  6. 6. The pps line needle tool sheet deburring process of claim 5, wherein, before the detecting step of step S3 is performed, the current deburring progress is detected by setting a spectrum, wherein: The spectrum analyzer is configured to monitor the specific spectral line intensity in the plasma in real time, when burrs are etched in a large amount, corresponding CN and CH characteristic spectrums are generated, when the burrs are basically removed, the spectrum signals tend to be stable when the PPS body is mainly etched, the burr removal proportion is judged in real time by monitoring the change rate of the spectrum signals, and when the threshold is reached, the plasma generator is stopped, so that overetching is prevented.
  7. 7. The pps line needle jig plate deburring process according to claim 6, wherein the vacuum chamber is externally connected with a process gas supply and recovery module, a control host is installed outside the vacuum chamber, a triaxial moving member is arranged at the inner bottom of the vacuum chamber, and a clamping station is arranged at the top of the triaxial moving member; the clamping station comprises the cathode substrate and a tooling fixture rotatably arranged at the top of the cathode substrate, and a clamping space opposite to the reinforced ion adsorption body is formed in the tooling fixture.

Description

Deburring process for pps line needle jig plate Technical Field The invention relates to the technical field of new material standardized treatment, in particular to a pps line needle jig plate deburring process. Background In the manufacturing of the wire needle jig, a large number of micropores are required to be drilled in the PPS sheet to accommodate the probe, so that in the industry at present, in order to pursue high precision and low burrs, a high-rigidity and high-cost japanese imported PPS material is generally adopted, and for burrs generated after drilling, the most similar existing cleaning technology mainly comprises: flushing the drilled plate by using compressed air or chemical cleaning agent to try to blow away or dissolve burrs; Mechanical polishing/deburring to remove burrs by secondary machining of the orifice with a miniature cutter or grinder. However, the above cleaning techniques have disadvantages including: the cleaning is incomplete, namely high-pressure air blowing and cleaning agent flushing have limited removal effect on the fine burrs (caused by plastic deformation of PPS material) which are firmly attached and are in particular deep in the hole, and the fine burrs are easy to remain; Secondary damage is easy to occur, namely mechanical polishing or deburring is adopted, the contact type processing is adopted, the risks of scratching the surface of a plate, expanding the aperture or changing the hole shape precision exist, the requirement on the operation skill is high, and the consistency is poor; the cost is high and the passive is that the pure dependence on imported high-performance PPS material is a high-cost passive avoidance strategy, the core problem of low material utilization rate can not be solved, and the generated burrs can not be treated; The method only aims at burrs, can not synchronously finish deep cleaning of oil stains and dust on the board, and needs to additionally increase cleaning procedures. Based on the current situation of industry, the technology of 'deburring' across fields is used for reference and deep research; plasma PPS deburring has a certain feasibility, mainly based on two physical effects: The tip effect is that burrs are microscopic bulges left after drilling, the curvature radius is extremely small, in a plasma environment, an electric field can be preferentially concentrated at the sharp bulge parts, so that the bombardment energy and the reaction rate of active particles on the burr area are far higher than those of the flat plate surface, and the burrs can be preferentially and rapidly etched; The specific surface area difference is that burrs have huge specific surface area (surface area under unit mass), compared with the flat plate surface, the burrs receive more active particle bombardment per unit area under the same plasma environment, and the reaction is more intense; In brief, plasma treatment is an isotropic surface etch in nature, but it has a natural "preferential aggressiveness" for "sharp, convex, weak" burrs. Meanwhile, the PPS is found through experimental study; the material characteristics of the PPS are that the PPS is a semi-crystalline polymer, an amorphous area of the PPS is easier to be etched by plasma than a crystalline area, burrs are mainly amorphous and loose mechanical deformation layers, so that the etching rate is far higher than that of a plate body with complete structure, and the characteristic difference can be perfectly utilized by controlling the parameters; The deep hole deburring process solves the challenges that plasma is a gaseous substance, has good diffraction and permeability, can enter deep of a micron-sized hole without dead angle, is an absolute advantage incomparable with a mechanical method, and is characterized in that in order to enhance the density of the plasma in the deep hole, the plasma is formed into an air knife with a deburring effect by improving the vacuum degree of the environment and optimizing the flowing direction and strength of the plasma, and according to experimental research summary, the deburring process of the pps line needle jig plate is provided. Disclosure of Invention Aiming at the defects of the prior art, the invention provides a pps wire needle jig plate deburring process, which solves the problems of single technical means, poor technical effect and poor cost benefit existing in the existing pps wire needle jig plate deburring process. In order to achieve the purpose, the invention is realized by the following technical scheme that the burr removing process for the pps line needle jig plate comprises the following steps: s1, loading clamping and internal environment adjustment; S2, performing global treatment on the first surface, and bombarding the plate through a plasma generation module to enable the plate to receive single-side irradiation of plasma; S3, detecting and judging, performing preliminary scanning by adopting a visual detection scheme, and i