CN112304810A

CN112304810A - SMD resistor and capacitor weldability anchor clamps

Info

Publication number: CN112304810A
Application number: CN202011024219.7A
Authority: CN
Inventors: 张增龙; 王峙卫; 路成萍
Original assignee: No 214 Institute of China North Industries Group Corp
Current assignee: No 214 Institute of China North Industries Group Corp
Priority date: 2020-09-25
Filing date: 2020-09-25
Publication date: 2021-02-02

Abstract

The invention provides a weldable fixture for a chip resistor and a capacitor, which comprises a tin furnace (1) and is characterized in that: be equipped with crane (2) respectively in tin stove (1) both sides, all be equipped with portable cantilever (3) on every crane (2), be equipped with to correspond in cantilever (3) one end and be connected with clamp (4), all the centre gripping has a substrate slot (5) on every clamp (4), and it has a set of substrate (6) to peg graft between two substrate slots (5), all is equipped with double-layered groove (6 a) in substrate (6) both sides. The invention has simple structure and convenient use, accurately controls the dipping height, ensures the test accuracy, improves the working efficiency and saves the production cost.

Description

SMD resistor and capacitor weldability anchor clamps

The technical field is as follows:

the invention relates to the technical field of welding tests, in particular to a weldable clamp for a surface mounted resistor and a capacitor.

Background art:

the solderability test is a test of the solderability of the leads of the devices that are typically to be soldered. The judgment of solderability depends on the ability of the leads to be wetted when coated with solder, or to form a proper fillet when dipped with solder.

In the solderability test, it is required that the solderability test equipment immerses the sample in the flux and the solder at a predetermined speed and to a predetermined depth.

At present, equipment for performing a weldability test is produced in China in two modes, wherein the first mode is to directly adopt a tin furnace for temperature control and manually perform a dipping test; the second mode is to use screw drive to lift the sample up and down for the dipping test.

For the first mode, which belongs to manual tests, the test conditions are difficult to ensure the accuracy; the second mode has the problem of sample vibration, and the phenomenon of sample falling occurs.

For the solderability test of the surface mounted resistor and the capacitor, because the resistor and the capacitor are small in size and are not fixed by a clamp, at present, the solderability test can be carried out only by adopting a first mode, directly adopting a tin furnace to control temperature and manually clamping by using metal tweezers. There are problems in that: (1) the fixation is unstable and the sliding is easy; (2) the efficiency is not high; (3) the height of the impregnation cannot be controlled.

The invention content is as follows:

the invention provides a weldable clamp for a surface mounted resistor and a capacitor, aiming at overcoming the defects in the prior art.

The application provides the following technical scheme:

the utility model provides a SMD resistor and condenser solderability anchor clamps, it includes the tin stove, its characterized in that: the two sides of the tin furnace are respectively provided with a lifting frame, each lifting frame is provided with a movable cantilever, one end of each cantilever is provided with a clamp body, one side of each clamp body is clamped with a substrate slot, a group of substrates are inserted between the two substrate slots, the two sides of each substrate are provided with clamp grooves, the clamp grooves on the adjacent substrates are matched with each other correspondingly, and one end of each slot is provided with a locking lock bolt matched with the corresponding substrate correspondingly.

On the basis of the technical scheme, the following further technical scheme can be provided:

and a scale rack is arranged on one side of each lifting rack.

The clamp comprises a clamp body and is characterized in that a bearing seat is arranged at one end of the cantilever, a rotating shaft connected and matched with the bearing seat is arranged at the other side of the clamp body, and a locking pin correspondingly matched with the rotating shaft is arranged on the bearing seat.

The lifting frame comprises a base, a screw rod is vertically connected to the base, a pair of nuts penetrate through the screw rod, and the end part of the other end of the cantilever penetrates through the screw rod between the two nuts.

The invention has the advantages that:

the invention has simple structure and convenient use, improves the integral stability in the resistor and capacitor test, can accurately control the dipping height of the resistor and the capacitor, ensures the test accuracy, improves the working efficiency and saves the production cost.

Description of the drawings:

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a top view of the invention after clamping the resistor;

FIG. 3 is a perspective view of the invention without the resistor clamped;

FIG. 4 is a schematic view of a substrate of the present invention in clamping a resistor or capacitor;

FIG. 5 is an enlargement of direction A of FIG. 4;

fig. 6 is a structural view of a substrate in the present invention.

The specific implementation mode is as follows:

as shown in fig. 1-6, a solderability clamp for a chip resistor and a capacitor comprises a tin furnace 1, wherein two sides of the tin furnace 1 are respectively provided with lifting frames 2 which are symmetrically distributed. The lifting frame 2 comprises a base 2a, a screw rod 2b is vertically and fixedly connected to the base 2a, and a pair of nuts 2c which are correspondingly matched are sleeved on the screw rod 2b in a penetrating manner.

All the crane 2 is sleeved with a cantilever 3, the cantilever 3 comprises a horizontal section a, one end of the horizontal section a is fixedly connected with a vertical section b, and the end part of the other end of the horizontal section a is sleeved on a screw rod 2b between two nuts 2c in a penetrating manner. The height of the cantilever 3 is adjusted by turning the nut 2 c.

A scale rack 7 has all been placed in every crane 2 one side, just can know the height of cantilever 3 through the scale bar of contrast cantilever 3 and scale rack 7 to ensure that cantilever 3 on two cranes 2 is at same height.

The lower end of the vertical section b is also provided with a bearing seat 3a, the bearing seat 3a is inserted with a rotating shaft 4a, and the bearing seat 3a is provided with a locking pin 4b correspondingly matched with the rotating shaft 4 a. One end of the rotating shaft 4a is fixedly connected with a clamp body 4, and a substrate slot 5 is clamped on the clamp body 4. One end of each substrate slot 5 is connected with a locking bolt 5a in a threaded mode, and one end of each locking bolt 5a is inserted into the substrate slot 5 and distributed along the axial direction of the substrate slot. The clamp body 4 is of an alligator clamp structure.

A group of substrates 6 which are horizontally distributed are inserted between the two substrate slots 5, the substrates 6 are in a strip-shaped structure made of aluminum oxide, and a group of semicircular clamping slots 6a which are distributed at intervals along the axial direction of the substrates 6 are arranged on both sides of the substrates 6.

The clamping grooves 6a on the two sides of each substrate 6 are uniformly matched with the clamping grooves 6a on the corresponding side of the adjacent substrate 6 on one side. The two sets of clamping grooves 6a distributed on both sides of each substrate 6 may be the same in size or different in size, but the clamping grooves 6a on the corresponding sides of the adjacent substrates 6 must be the same in size. Thus, different-sized and batches of resistors 8 (or capacitors) can be simultaneously clamped by a group of clamping grooves 6a with different sizes of the substrates 6. Only one side of the base plate 6 positioned at the outermost side of the substrate slot 5 in the group of substrates 6 is provided with a clamping slot 6 a.

The working process is as follows:

a resistor 8 (or a capacitor) to be tested is placed between two corresponding clamping slots 6a of two adjacent substrates 6, then the locking bolt 5a is rotated, one end of the locking bolt 5a pushes the substrates 6 to move towards one side of the clamping slot 6a, all the substrates 6 move towards one side of the clamping slot 6a, and after the substrates 6 far away from the locking bolt 5a are contacted with the slot wall at the other end of the clamping slot 6a and stop moving, the locking bolt 5a is continuously rotated to push the adjacent substrates 6 to clamp the resistor 8 (or the capacitor) inserted between the two clamping slots 6 a.

After the resistor 8 (or capacitor) is clamped, the clamp body 4 is adjusted to screw the locking pins 4b when the two substrate slots 5 are horizontally distributed, so that all the substrates 6 are horizontally distributed. Then, the height of the cantilever 3 is adjusted by rotating the nut 2c, so that the lower part of the resistor 8 (or the capacitor) clamped between the substrates 6 is slowly soaked in tin liquid of the tin furnace 1, after the soaking is finished, the nut 2c is rotated to lift the cantilever 3 to lift the resistor 8 (or the capacitor) clamped between the substrates 6 to the upper part of the tin furnace 1, then the two substrate slots clamped on the clamp body 4 are taken down, finally, the locking bolt 5a is released on the workbench, and the resistor 8 (or the capacitor) is taken down.

Claims

1. The utility model provides a SMD resistor and condenser solderability anchor clamps, it includes tin stove (1), its characterized in that: be equipped with crane (2) respectively in tin stove (1) both sides, all be equipped with mobilizable cantilever (3) on every crane (2), be equipped with clamp (4) in cantilever (3) one end, every clamp (4) one side all centre gripping has a substrate slot (5), it has a set of substrate (6) to peg graft between two substrate slots (5), all be equipped with in substrate (6) both sides and press from both sides groove (6 a) to press from both sides groove (6 a) on adjacent substrate (6) correspond the cooperation each other slot (5) one end be equipped with and correspond complex locking set bar (5 a) with substrate (6).

2. A chip resistor and capacitor solderable anchor clamps as claimed in claim 1, wherein: and a scale rack (7) is arranged on one side of each lifting rack (2).

3. A chip resistor and capacitor solderable anchor clamps as claimed in claim 1, wherein: cantilever (3) one end is equipped with bearing frame (3 a) clamp (4) opposite side is equipped with and is connected complex pivot (4 a) with bearing frame (3 a), is equipped with on bearing frame (3 a) and corresponds complex fitting pin (4 b) with pivot (4 a).

4. A chip resistor and capacitor solderable anchor clamps as claimed in claim 1, wherein: the lifting frame (2) comprises a base (2 a), a screw rod (2 b) is vertically connected to the base (2 a), a pair of nuts (2 c) are sleeved on the screw rod (2 b) in a penetrating mode, and the end portion of the other end of the cantilever (3) is sleeved on the screw rod (2 b) between the two nuts (2 c) in a penetrating mode.