CN218180889U

CN218180889U - Device for improving repeated positioning precision of wire probe tester

Info

Publication number: CN218180889U
Application number: CN202221650628.2U
Authority: CN
Inventors: 徐望明
Original assignee: Suzhou Yilaisheng Photoelectric Technology Co ltd
Current assignee: Suzhou Yilaisheng Photoelectric Technology Co ltd
Priority date: 2022-06-28
Filing date: 2022-06-28
Publication date: 2022-12-30
Anticipated expiration: 2032-06-28

Abstract

The utility model discloses a device to line needle tester improve repeated positioning accuracy relates to high-end PCB electricity and surveys equipment technical field, include: the surface of the turntable is provided with four fixtures for clamping a workpiece; a DD motor mounted to a surface of the turntable, the DD motor being mounted to a surface of a base plate; and the positioning structure is arranged on the surface of the bottom plate and used for accurately positioning the turntable. The utility model discloses possessed and made the improvement to carousel formula equipment, let it have the high accuracy concurrently when guaranteeing that it is efficient, the DD motor only is tentatively fixed a position, comes to carry out the accurate location to the carousel through outside mechanical device, and external device is mechanical type, and the precision of repeated positioning is higher, consequently can realize the effect of high accuracy.

Description

Device for improving repeated positioning precision of wire probe tester

Technical Field

The utility model relates to an equipment technical field is surveyed to high-end PCB electricity specifically is a device to wire needle testing machine improvement repeated positioning accuracy.

Background

When the PCB equipment is inspected, two kinds of equipment are generally used, one is linear motion type single-station equipment and double-station equipment, and the other is rotating disc type four-station equipment, wherein the former has the characteristic of high detection precision but relatively low efficiency, and the latter has the characteristic of higher efficiency but relatively low detection precision just opposite to the former.

The carousel in the carousel formula quadruplex position equipment is by the DD motor drive, and the carousel comprises a plurality of tools, and the tool is used for giving PCB clamp tightly and fix a position, and equipment on the existing market all directly leans on the DD motor to guarantee the rotational positioning precision of carousel, and when the carousel size is great, the positioning precision of DD motor self can not satisfy the higher precision requirement of equipment, and consequently the precision is lower.

The rotary positioning precision and the repetition precision of the DD motor are related to a rotary encoder inside the DD motor, the size of the encoder limits the angular precision of the DD motor, and when the diameter of a turntable is large, the linear positioning error of a jig is amplified by many times at a position close to the outer circle of the turntable, so that the precision of equipment is reduced.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a improve device of repeated positioning precision to line needle tester has possessed and has made the improvement to carousel formula equipment, lets it have the high accuracy concurrently when guaranteeing that efficient, and preliminary location is only done to the DD motor, carries out the accurate positioning to the carousel through outside mechanical device, and external device is mechanical type, and repeated positioning's precision is higher, consequently can realize the effect of high accuracy, has solved the problem that proposes among the above-mentioned background art.

In order to achieve the above object, the utility model provides a following technical scheme: a device for improving repeated positioning precision of a wire probe tester comprises:

the surface of the turntable is provided with four fixtures for clamping a workpiece;

a DD motor mounted on a surface of the turntable, the DD motor being mounted on a surface of a base plate;

and the positioning structure is arranged on the surface of the bottom plate and used for accurately positioning the turntable.

Optionally, the positioning structure includes:

the servo motor is connected with the force control platform deck through a lead screw linear module;

the surface of the force control carrying platform is provided with a guide shaft, and the end part of the guide shaft is provided with a positioning bearing;

the surface of the turntable is provided with a V-shaped notch;

also includes a sensing auxiliary component and a deflection regulating component.

Optionally, the sensing aid component includes:

the force sensor is installed on the force control carrier, one end of the force sensor is connected with the positioning bearing through the guide shaft, and the other end of the force sensor is fixed on the force control carrier.

Optionally, the deflection adjusting component includes:

the surface of the rotating rod is fixedly connected with the surface of the servo motor, the surface of the rotating rod is connected with the surface of the bottom plate in a fixed-axis rotating mode, and the surface of the rotating rod is fixedly connected with a rotating block.

Optionally, the surface of the turntable is provided with four sensing pieces, and the four sensing pieces correspond to the positions of the jigs one to one;

the induction sheet can control the DD motor to stop running;

and a signal emitter is arranged on the surface of the servo motor.

Optionally, the surface of the bottom plate is fixedly connected with an installation shell, and an illuminating lamp is installed on the surface of the installation shell.

Compared with the prior art, the beneficial effects of the utility model are as follows:

1. the utility model discloses a positioning structure's setting down makes the positioning accuracy of carousel have very big improvement.

2. The utility model discloses a under location structure's accurate location, make equipment can satisfy the PCB of higher required precision under guaranteeing efficient prerequisite and detect.

3. The utility model discloses a setting of location structure is down, because of location structure is mechanical operation structure, has the higher characteristics of repeated location and precision, and the mounted position can arrange in a flexible way, can directly fix a position the carousel outermost lane. It is relatively easy to achieve high accuracy.

Drawings

FIG. 1 is a front view of the structure of the present invention;

FIG. 2 is an isometric view of the structure of the present invention;

FIG. 3 is an enlarged view of the structure A of FIG. 1 according to the present invention;

fig. 4 is a schematic view of the structure of the induction sheet of the present invention.

In the figure: 1. a turntable; 2. a jig; 3. a DD motor; 4. a servo motor; 5. a screw rod linear module; 6. a force-controlled stage; 7. a guide shaft; 8. a force sensor; 9. positioning a bearing; 10. a base plate; 11. a V-shaped notch; 12. a rotating rod; 13. rotating the block; 14. an induction sheet; 15. a signal transmitter; 16. mounting a shell; 17. provided is a lighting lamp.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Referring to fig. 1 to 4, the present invention provides a device for improving repeated positioning accuracy of a wire probe tester, including:

the surface of carousel 1, carousel 1 is provided with four jigs 2 that are used for carrying out the centre gripping to the work piece.

DD motor 3, DD motor 3 are installed on the surface of the rotary table 1, DD motor 3 is installed on the surface of the base plate 10.

Location structure sets up on the surface of bottom plate 10 for carry out the accurate positioning to carousel 1, and DD motor 3 only does preliminary location in this scheme, stops after target position as DD motor 3, gives DD motor 3 to go the back of enabling, carries out the essence location to carousel 1 through outside mechanical device, because external device is mechanical type, and repeated positioning accuracy is higher, and the mounted position can arrange in a flexible way, fixes a position like direct 1 outermost circle to carousel. It is relatively easy to achieve high accuracy.

Further, the positioning structure comprises:

the servo motor 4 is connected with a force control carrier 6 through a lead screw linear module 5.

The surface of the force control carrier 6 is provided with a guide shaft 7, and the end part of the guide shaft 7 is provided with a positioning bearing 9.

The surface of the rotary table 1 is provided with a V-shaped notch 11.

The positioning structure has the advantages that the positioning structure can accurately position the turntable 1 under the action of the positioning structure, and is different from a DD motor 3 positioning mode, an external positioning method is adopted in the method, the method is different from an existing internal positioning method, when the diameter of the turntable 1 is large, the linear positioning error of the jig 2 is amplified by many times at a position close to the outer circle of the turntable 1, and therefore the precision of equipment is reduced.

Further, the sensing aid includes:

and the force sensor 8 is arranged on the force control carrier 6, one end of the force sensor 8 is connected with the positioning bearing 9 through the guide shaft 7, and the other end of the force sensor 8 is fixed on the force control carrier 6.

Further, the deflection regulating member includes:

bull stick 12, the surface of bull stick 12 is connected with servo motor 4's fixed surface, the surface of bull stick 12 rotates with the surface dead axle of bottom plate 10 and is connected, the fixed surface of bull stick 12 is connected with commentaries on classics piece 13, through turning round piece 13, make and drive bull stick 12 and servo motor 4 and deflect, the effect of adjusting location structure's angle has been reached, because of the condition of installation angle deviation can appear in current installation, if dismantle again and install, the operation is too troublesome, this formula passes through the rotation of bull stick 12 and can realize, simultaneously under the effect of no external force, also can guarantee the stability of bull stick 12, also can assist locking structure to lock bull stick 12, in order to improve its application scope.

Further, the surface of carousel 1 is provided with response piece 14, and the quantity of response piece 14 is four, and with the position one-to-one of tool 2.

The sensing piece 14 can control the DD motor 3 to stop running.

The surface mounting of servo motor 4 has signal transmitter 15, rotates along with DD motor 3 drive carousel 1 and response piece 14, and when response piece 14 sensed signal transmitter 15, but the messenger DD motor 3 drive carousel 1's rotation power was cut off then stops to the signalization, does not need opening of user's round trip to stop to ensure carousel 1 turned angle's precision and improve convenient degree.

Further, the surface of the bottom plate 10 is fixedly connected with a mounting shell 16, and the surface of the mounting shell 16 is provided with an illuminating lamp 17, so that the illuminating lamp 17 achieves the effect of supplementing a light source, and when the problem of the PCB is detected, a user can conveniently observe the PCB.

The working principle is as follows: when the device for improving the repeated positioning precision of the wire pair tester is used, after the turntable 1 stops at a target position, the servo motor 4 drives the force control carrier 6 to move towards the V-shaped notch 11 of the turntable 1 through the lead screw linear module 5, the guide shaft 7 is installed on the force control carrier 6, the positioning bearing 9 is installed at the end part of the guide shaft 7, and when the force control carrier 6 moves forwards and the positioning bearing 9 contacts the V-shaped notch 11 on the turntable 1, the positioning bearing 9 can extrude the V-shaped notch 11 of the turntable, so that the turntable 1 stops at a target position with higher precision after micro-rotation movement;

a force sensor 8 is arranged on the force control carrier 6, the front end of the force sensor 8 is connected with a positioning bearing 9 through a guide shaft 7, the other end of the force sensor is fixed on the force control carrier 6, when the positioning bearing 9 contacts a V-shaped notch 11 of the turntable, a force value is output to a system through the force sensor 8, the system sends an instruction to the servo motor 4 through analyzing the force to stop moving, and the turntable is accurately positioned;

the motion flow of the device is as follows:

s1: the DD motor drives the turntable to rotate by 90 degrees, and the enable is removed after the turntable stops;

s2: the servo motor drives the force to control the carrier to advance;

s3: force feedback output of the force sensor;

s4: stopping the servo motor, and finishing the fine positioning of the turntable;

s5: the equipment starts to detect the PCB;

s6: completing PCB detection;

s7: the servo motor retreats;

s8: the DD motor drives the turntable to rotate 90 ° into the next cycle.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides a device to line needle test machine improves repeated positioning accuracy which characterized in that: the method comprises the following steps:

the fixture comprises a rotary table (1), wherein four fixtures (2) for clamping a workpiece are arranged on the surface of the rotary table (1);

a DD motor (3), wherein the DD motor (3) is installed on the surface of the rotary table (1), and the DD motor (3) is installed on the surface of the base plate (10);

and the positioning structure is arranged on the surface of the bottom plate (10) and is used for accurately positioning the turntable (1).

2. The apparatus for improving the repeated positioning accuracy of the probe tester according to claim 1, wherein: the positioning structure includes:

the servo motor (4) is connected with a force control platform (6) through a screw rod linear module (5);

a guide shaft (7) is arranged on the surface of the force control carrying platform (6), and a positioning bearing (9) is arranged at the end part of the guide shaft (7);

the surface of the turntable (1) is provided with a V-shaped notch (11);

3. The device for improving the repeated positioning accuracy of the wire-needle tester as recited in claim 2, wherein: the sensing aid includes:

the force sensor (8) is installed on the force control carrier (6), one end of the force sensor (8) is connected with the positioning bearing (9) through the guide shaft (7), and the other end of the force sensor (8) is fixed on the force control carrier (6).

4. The apparatus for improving the repeated positioning accuracy of the probe alignment tester according to claim 2, wherein: the deflection regulating member includes:

the surface of the rotating rod (12) is fixedly connected with the surface of the servo motor (4), the surface of the rotating rod (12) is fixedly connected with the surface of the bottom plate (10) in a shaft-fixed mode, and the surface of the rotating rod (12) is fixedly connected with a rotating block (13).

5. The device for improving the repeated positioning accuracy of the wire-needle tester as recited in claim 2, wherein: the surface of the turntable (1) is provided with four induction sheets (14), and the induction sheets (14) correspond to the positions of the jigs (2) one by one;

the induction sheet (14) can control the DD motor (3) to stop running;

and a signal emitter (15) is arranged on the surface of the servo motor (4).

6. The apparatus for improving the repeated positioning accuracy of the probe tester according to claim 1, wherein: the surface of the bottom plate (10) is fixedly connected with an installation shell (16), and an illuminating lamp (17) is installed on the surface of the installation shell (16).