Vertical vacuum assembly jig for probe-on-needle and assembly process thereof

Abstract

The application discloses a vertical vacuum assembly jig for a probe upper needle and an assembly process thereof, comprising an upper die body, a plurality of containing holes are arranged on the bottom of the upper die body according to a preset interval, a containing groove is arranged on the top of the upper die body, the containing groove and the containing hole are mutually penetrated, a material ejection slide plate is arranged in the containing groove, the material ejection slide plate can continue to slide up and down along the containing groove, the containing groove is used for placing the upper needle of the probe, the top of the upper needle is in contact with the bottom of the material ejection slide plate, a vacuum through hole is arranged on the side wall of the upper die body, and the vacuum through hole is used for connecting a vacuum generator to generate negative pressure in the containing groove. The upper needle is fixed in the containing hole through vacuum adsorption, the problems of needle head deviation and falling caused by spring elastic force are solved, in addition, through timing control of 'upper needle moving first and die body moving later', the problem that the large outer diameter of the needle is clamped and hurt in the initial stage of pipe body pressing is avoided, and the product yield is greatly improved.

Description

Technical Field

[0001] This invention relates to the field of probe assembly, and more specifically to a vertical vacuum assembly fixture for needles on probes and its assembly process. Background Technology

[0002] Existing test probes have the following problems when assembling the upper needle and the tube body: 1. Poor positioning accuracy: Because the spring in the lower tube seat often approaches or protrudes from the tube opening, its elasticity can easily cause the upper needle to shift during assembly or even fall out of the steel mold hole, seriously affecting the mold closing accuracy of the upper steel mold. 2. High product damage rate: During the pressing process, the tube opening of the lower tube seat is prone to prematurely contacting and clamping the large outer diameter part of the upper needle, resulting in needle damage or tube seat deformation, causing product defects.

[0003] 3. Low assembly efficiency: The above problems require workers to frequently adjust the needle position manually, which is cumbersome, inefficient, and difficult to meet the needs of large-scale production. Summary of the Invention

[0004] To address the aforementioned problems, this invention provides a vertical vacuum assembly fixture for a probe tip, comprising an upper mold body. A plurality of receiving holes are arranged at predetermined intervals at the bottom of the upper mold body, and a receiving groove is provided at the top of the upper mold body. The receiving groove communicates with the receiving holes. A ejector plate is provided within the receiving groove, and the ejector plate can slide up and down along the receiving groove. The receiving groove is used to place the probe tip, and the top of the probe tip contacts the bottom of the ejector plate. A vacuum through-hole is provided on the side wall of the upper mold body, and the vacuum through-hole is used to connect a vacuum generator to generate negative pressure within the receiving groove.

[0005] Furthermore, the upper needle includes a first needle body and a second needle body, the outer diameter of the second needle body is larger than the outer diameter of the first needle body, the probe also includes a tube and a spring, the spring is disposed in the tube, and a tube opening is formed at the top of the tube. When the upper needle is assembled with the tube, the outer wall of the second needle body is in close contact with the tube.

[0006] Furthermore, the top material slide plate includes a first working state and a second working state. In the first working state, the top material slide plate is away from the bottom of the receiving groove, the receiving groove is under negative pressure, the first needle body is fully received in the receiving hole, and the second needle body is inserted into the tube opening and is coaxially aligned with the tube body and the spring. In the second working state, the top material slide plate is in contact with the bottom of the receiving groove, the first needle body extends downward from the receiving hole, and the second needle body moves downward away from the tube opening.

[0007] Furthermore, support steps are provided at both ends of the receiving groove, support plates are provided at both ends of the top material slide plate, and spring plungers are provided between the support steps and the support plates.

[0008] Furthermore, a chamber is provided on the side wall of the top material slide plate, the chamber is interconnected with the receiving groove, and the vacuum through hole is interconnected with the chamber.

[0009] Furthermore, a flared opening is provided at the top of the receiving hole. When the upper mold body is closed, the flared opening presses against the tube opening to wrap around the top of the second needle body.

[0010] This application also provides a vertical vacuum assembly process for a probe tip, comprising the following steps: S1: Inserting the upper needle tip into the receiving hole, at which time the ejector plate is in the first working state, and the first needle body is completely inserted into the receiving hole; S2: Activating the vacuum generator to generate negative pressure between the receiving groove and the ejector plate, and the top of the first needle body is adsorbed onto the bottom of the ejector plate; S3: Performing the first mold closing, closing the upper mold body with the mold base containing the tube and spring below, so that the upper needle tip is inserted into the tube and coaxially aligned with the spring for assembly. S4: Turn off the vacuum generator to release the suction of the upper needle; S5: External force drives the ejector slide to move downward against the elastic force of the spring plunger, so that the ejector slide contacts the bottom of the receiving groove, thereby extending the first needle body downward from the receiving hole, and the spring is compressed, and the second needle body moves away from the tube opening; S6: When the ejector slide ends its movement stroke, the assembly force continues to increase. When the force exceeds the elastic force of the spring plunger, the upper mold body moves downward against the resistance, and the flared opening of the receiving hole squeezes the tube opening, completing the sealing and pressing operation.

[0011] Furthermore, the vacuum generator is started 0.1 to 0.5 seconds after the first needle body of the upper needle tip has fully entered the receiving hole and the top material slide plate is in the first working state, so as to ensure that the top of the first needle body and the bottom of the top material slide plate form a sealed adsorption area.

[0012] Furthermore, the downward travel length of the top material slide plate is greater than the length of the second needle body extending out of the tube opening, so that the second needle body completely exits the tube opening wrapping operation area.

[0013] Furthermore, in step S6, the cone angle of the flared opening of the receiving hole is 45° to 75°, which generates radial pressing force when it contacts the tube opening. After the opening is completed, the tube opening is rolled inward and attached to the upper circumferential surface of the second needle body.

[0014] Compared with the prior art, the beneficial effects of the present invention are: Compared with existing technologies, this application uses vacuum adsorption to firmly fix the upper needle in the receiving hole, which completely solves the problem of needle displacement and falling off caused by spring force. In addition, by controlling the timing of "upper needle moving first and mold body moving later", the large outer diameter of the needle is not damaged in the early stage of tube pressing, which greatly improves the product yield.

[0015] Additional aspects and advantages of the invention will be set forth in the description which follows, and in some respects will be obvious from the description or may be learned by practice of the invention. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the upper mold body of the present invention; Figure 3 This is a schematic diagram of the top material sliding plate of the present invention; Figure 4 This is a cross-sectional view of the overall structure of the present invention; Figure 5 This is an enlarged view of part A of the overall structural cross-sectional view of the top material sliding plate of the present invention in the first working state; Figure 6 This is an enlarged view of part A of the overall structural cross-section of the top material sliding plate of the present invention in the second working state; Figure 7 This is an enlarged view of part A of the overall structural cross-sectional view of the upper mold body of the present invention in the mold-closed state; The reference numerals and names in the figure are as follows: Upper mold body 100, receiving hole 110, receiving groove 120, ejector plate 200, probe 300, upper needle head 310, vacuum through hole 140, first needle body 311, second needle body 312, tube body 320, tube opening 321, spring 330, support step 121, support plate 210, cavity 220, flared mouth 111. Detailed Implementation

[0018] The preferred embodiments of the present invention will now be further described with reference to the accompanying drawings. Figures 1 to 7As shown, a vertical vacuum assembly fixture for a probe tip includes an upper mold body 100. A plurality of receiving holes 110 are provided at predetermined intervals at the bottom of the upper mold body 100. A receiving groove 120 is provided at the top of the upper mold body 100, and the receiving groove 120 communicates with the receiving holes 110. A top-feeding slide plate 200 is provided within the receiving groove 120, and the top of the top-feeding slide plate 200 can slide up and down along the receiving groove 120. The receiving groove 120 is used to place the upper needle tip 310 of the probe 300. The top of the upper needle tip 310 contacts the bottom of the top-feeding slide plate 200. A vacuum through hole 140 is provided on the side wall of the upper mold body 100, and the vacuum through hole 140 is used to connect a vacuum generator (not shown in the figure) to generate negative pressure within the receiving groove 120.

[0019] This application relates to a fixture for assembling the upper needle 310 of a test probe 300 with the tube body 320 and the spring 330. In the working state of this application, the receiving groove 120 is first continuously evacuated through the vacuum through hole 140 to create a negative pressure in the receiving groove 120. At this time, the upper needle 310 is attracted by the ejector plate 200 and is completely accommodated in the receiving hole 110. Then, the upper needle 310 is aligned coaxially with the tube body 320 and the spring 330. After the negative pressure is removed, the ejector plate 200 is driven by external force to continue moving towards the receiving groove 120, thereby assembling the upper needle 310 with the tube body 320 and the spring 330. Finally, the upper mold body 100 is driven by external force to move downward to close the mold and complete the sealing operation of the tube body 320.

[0020] Compared with the prior art, this application uses vacuum adsorption to firmly fix the upper needle 310 in the receiving hole 110, which completely solves the problem of needle displacement and falling off caused by the elastic force of spring 330. In addition, by controlling the timing of "upper needle 310 moves first and mold body moves later", the large outer diameter of the needle is not pinched in the early stage of tube body 320 pressing, which greatly improves the product yield.

[0021] Furthermore, based on the above embodiments, combined with Figures 5 to 7 As shown, the upper needle 310 includes a first needle body 311 and a second needle body 312. The outer diameter of the second needle body 312 is larger than the outer diameter of the first needle body 311. The probe 300 also includes a tube body 320 and a spring 330. The spring 330 is disposed inside the tube body 320. A tube opening 321 is formed at the top of the tube body 320. When the upper needle 310 is assembled with the tube body 320, the outer wall of the second needle body 312 is in close contact with the tube body 320.

[0022] Furthermore, based on the above embodiments, combined with Figures 5 to 7As shown, the top material slide plate 200 includes a first working state and a second working state. In the first working state, the top material slide plate 200 is away from the bottom of the receiving groove 120, the receiving groove 120 is under negative pressure, the first needle body 311 is fully received in the receiving hole 110, and the second needle body 312 is inserted into the tube opening 321 and is coaxially aligned with the tube body 320 and the spring 330. In the second working state, the top material slide plate 200 is in contact with the bottom of the receiving groove 120, the first needle body 311 extends downward from the receiving hole 110, and the second needle body 312 moves downward away from the tube opening 321. In the first working state of the ejector slide plate 200, since the first needle body 311 is completely contained in the receiving hole 110, the upper needle body will not shift when it is assembled with the tube body 320 and the spring 330. In the second working state, under external pressure, the ejector slide plate 200 descends along the receiving groove 120, thereby pressing the second needle body 312 away from the tube opening 321, so that when the upper mold body 100 closes the mold for the tube opening 321, it will not damage the second needle body 312.

[0023] Furthermore, based on the above embodiments, combined with Figures 1 to 3 As shown, support steps 121 are provided at both ends of the receiving groove 120, and support plates 210 are provided at both ends of the top material slide plate 200. A spring plunger (not shown in the drawing) is provided between the support steps 121 and the support plates 210. When the top material slide plate 200 is in the first working state, the top material slide plate 200 and the receiving groove 120 are counteracted by the spring plunger to offset the negative pressure in the receiving groove 120, so that the top material slide plate 200 can move away from the bottom of the receiving groove 120, thereby completely adsorbing the first needle body 311 into the receiving hole 110. When the top material slide plate 200 is in the first working state, under external pressure, it can be pressed down by other hydraulic devices to overcome the elastic force of the spring plunger and move downward, so that the top material slide plate 200 contacts the bottom of the receiving groove 120, thereby extending the first needle body 311 downward from the receiving hole 110.

[0024] Furthermore, based on the above embodiments, combined with Figures 1 to 3 As shown, a chamber 220 is provided on the side wall of the top material slide plate 200. The chamber 220 is interconnected with the receiving groove 120, and the vacuum through hole 140 is interconnected with the chamber 220. In this way, when a vacuum is drawn, the air in the receiving groove 120 can first flow through the chamber 220 and then flow out through the vacuum through hole 140, thereby ensuring that the receiving groove 120 is under negative pressure.

[0025] Furthermore, based on the above embodiments, combined with Figures 5 to 7As shown, a flared opening 111 is provided at the top of the receiving hole 110. When the upper mold body 100 closes the mold, the flared opening 111 presses against the tube opening 321 to wrap around the top of the second needle body 312. In this way, when the upper mold body 100 closes the mold to wrap around the tube opening 321, it will not damage the second needle body 312.

[0026] Combination Figures 5 to 7 As shown, this application also discloses a vertical vacuum assembly process for a probe tip based on the above structure, comprising the following steps: S1: Insert the upper needle 310 into the receiving hole 110. At this time, the top material slide plate 200 is in the first working state, and the first needle body 311 is completely inserted into the receiving hole 110. S2: Activate the vacuum generator to create negative pressure between the receiving groove 120 and the top material slide plate 200, causing the top of the first needle body 311 to be adsorbed onto the bottom of the top material slide plate 200. This ensures that when the upper needle 310 is assembled with the tube body 320 and the spring 330, the upper needle 310 will not shift or fall off due to the spring force of the spring 330, completely solving the problem of the spring 330 tilting the upper needle 310 or causing it to fall off in traditional processes, thus ensuring the coaxiality of the upper needle 310 during assembly. S3: Perform the first mold closing, close the upper mold body 100 with the mold base below which is equipped with tube body 320 and spring 330, so that the upper needle 310 is inserted into tube body 320 and coaxially aligned with spring 330. S4: Turn off the vacuum generator to release the suction of the upper needle 310; at this time, the stroke of the upper needle 310 is only limited by the tube body 320 and the spring plunger, in preparation for the top material slide plate 200 to enter the second working state.

[0027] S5: External force drives the ejector plate 200 to move downward against the elastic force of the spring plunger, so that the ejector plate 200 contacts the bottom of the receiving groove 120, thereby extending the first needle body 311 downward from the receiving hole 110, and the spring 330 is compressed, and the second needle body 312 moves away from the tube opening 321; in this way, the ejector plate 200 and the upper needle head 310 move down a certain distance, while the upper mold body 100 remains stationary. The function of this downward stroke is to push the second needle body 312 out of the tube opening 321 position of the tube body 320, ensuring that the tube opening 321 will not contact the second needle body 312 during the next sealing operation, thus avoiding being pinched.

[0028] S6: When the top slide plate 200 finishes its travel, the assembly force continues to increase. When the force exceeds the spring force of the spring plunger, the upper mold body 100 moves downward against the resistance. The flared mouth 111 of the receiving hole 110 squeezes the opening 321 of the tube body 320, completing the sealing and pressing operation.

[0029] Further, in step S2, the vacuum generator is started after a delay of 0.1 to 0.5 seconds after the first needle body 311 of the upper needle 310 has fully entered the receiving hole 110 and the top material slide plate 200 is in the first working state, so as to ensure that the top of the first needle body 311 and the bottom of the top material slide plate 200 form a sealed adsorption area.

[0030] Furthermore, in step S5, the downward travel length of the top material slide plate 200 is greater than the length of the portion of the second needle body 312 extending out of the tube opening 321, so that the second needle body 312 completely exits the packaging operation area of ​​the tube opening 321.

[0031] Further, based on the above embodiment, in step S6, the cone angle of the flared mouth 111 of the receiving hole 110 is 45° to 75°. When it comes into contact with the tube opening 321 of the tube body 320, it generates a radial pressing force. After the opening is completed, the tube opening 321 is rolled inward and attached to the upper circumferential surface of the second needle body 312.

[0032] The details of the exemplary embodiments described above are provided, and the invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the invention.

Claims

1. A vertical vacuum assembly fixture for a probe tip, characterized in that, The device includes an upper mold body (100), with a plurality of receiving holes (110) arranged at a preset interval at the bottom of the upper mold body (100), and a receiving groove (120) arranged at the top of the upper mold body (100). The receiving groove (120) communicates with the receiving holes (110). An ejector plate (200) is arranged in the receiving groove (120). The ejector plate (200) can continue to slide up and down along the receiving groove (120). The receiving groove (120) is used to place the upper needle (310) of the probe (300). The top of the upper needle (310) is in contact with the bottom of the ejector plate (200). A vacuum through hole (140) is arranged on the side wall of the upper mold body (100). The vacuum through hole (140) is used to connect a vacuum generator to generate negative pressure in the receiving groove (120).

2. The vertical vacuum assembly fixture for a probe tip according to claim 1, characterized in that, The upper needle (310) includes a first needle body (311) and a second needle body (312). The outer diameter of the second needle body (312) is larger than the outer diameter of the first needle body (311). The probe (300) also includes a tube (320) and a spring (330). The spring (330) is disposed inside the tube (320). A tube opening (321) is formed at the top of the tube (320). When the upper needle (310) is assembled with the tube (320), the outer wall of the second needle body (312) is in close contact with the tube (320).

3. The vertical vacuum assembly fixture for a probe tip according to claim 2, characterized in that, The top material slide plate (200) includes a first working state and a second working state. In the first working state, the top material slide plate (200) is away from the bottom of the receiving groove (120), the receiving groove (120) is under negative pressure, the first needle body (311) is fully received in the receiving hole (110), and the second needle body (312) is inserted into the tube opening (321) and is coaxially aligned with the tube body (320) and the spring (330). In the second working state, the top material slide plate (200) is in contact with the bottom of the receiving groove (120), the first needle body (311) extends downward from the receiving hole (110), and the second needle body (312) moves downward away from the tube opening (321).

4. The vertical vacuum assembly fixture for a probe tip according to claim 3, characterized in that, Support steps (121) are provided at both ends of the receiving groove (120), support plates (210) are provided at both ends of the top material slide plate (200), and spring plungers are provided between the support steps (121) and the support plates (210).

5. The vertical vacuum assembly fixture for a probe tip according to claim 3, characterized in that, A chamber (220) is provided on the side wall of the top material slide plate (200), the chamber (220) is connected to the receiving groove (120), and the vacuum through hole (140) is connected to the chamber (220).

6. The vertical vacuum assembly fixture for a probe tip according to claim 3, characterized in that, A flared opening (111) is provided at the top of the receiving hole (110). When the upper mold body (100) is closed, the flared opening (111) presses against the tube opening (321) so that it wraps around the top of the second needle body (312).

7. A vertical vacuum assembly process for a probe tip, characterized in that, The steps include the following: S1: Insert the upper needle (310) into the receiving hole (110). At this time, the top material slide plate (200) is in the first working state, and the first needle body (311) is completely inserted into the receiving hole (110). S2: Start the vacuum generator to create a negative pressure between its receiving groove (120) and the top material slide plate (200), and the top of the first needle body (311) is adsorbed to the bottom of the top material slide plate (200); S3: Perform the first mold closing, close the upper mold body (100) with the mold base below which is equipped with tube body (320) and spring (330), so that the upper needle (310) is inserted into the tube body (320) and aligned coaxially with the spring (330); S4: Turn off the vacuum generator to release the adsorption on the upper needle (310); S5: The external force drives the top material slide plate (200) to overcome the elastic force of the spring plunger and move downward, so that the top material slide plate (200) contacts the bottom of the receiving groove (120), thereby extending the first needle body (311) downward from the receiving hole (110), and the spring (330) is compressed, and the second needle body (312) moves away from the tube opening (321). S6: When the top material slide plate (200) finishes its travel, the assembly force continues to increase. When the force exceeds the spring force of the spring plunger, the upper mold body (100) moves downward against the resistance. The flared mouth (111) of the receiving hole (110) squeezes the opening (321) of the tube body (320) to complete the sealing and pressing operation.

8. A vertical vacuum assembly process for a probe tip according to claim 7, characterized in that, In step S2, the vacuum generator is started after a delay of 0.1 to 0.5 seconds after the first needle body (311) of the upper needle (310) has fully entered the receiving hole (110) and the top material slide plate (200) is in the first working state, so as to ensure that the top of the first needle body (311) and the bottom of the top material slide plate (200) form a sealed adsorption area.

9. A vertical vacuum assembly process for a probe tip according to claim 7, characterized in that, In step S5, the downward travel length of the top material slide plate (200) is greater than the length of the part of the second needle body (312) that extends out of the tube opening (321), so that the second needle body (312) completely exits the packaging operation area of ​​the tube opening (321).

10. A vertical vacuum assembly process for a probe tip according to claim 7, characterized in that, In step S6, the cone angle of the flared mouth (111) of the receiving hole (110) is 45° to 75°. When it comes into contact with the tube opening (321) of the tube body (320), it generates radial pressing force. After the opening is completed, the tube opening (321) is rolled inward and attached to the upper surface of the second needle body (312).

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