A chip-type machining tool and machining method thereof

Abstract

The present invention aims to provide a disc-type processing tool and a processing method thereof that can perform small-pitch grooving, has low processing cost, high efficiency and stable operation. The disc-type processing tool comprises a tool handle, a fixed head and a plurality of saw blades, wherein the plurality of saw blades are sleeved on the tool handle, the fixed head cooperates with the tool handle to clamp the plurality of saw blades, the fixed head is fixedly connected to the tool handle by a fixing screw, and a spacer is provided between two adjacent saw blades; the processing method is a method for processing small-pitch connection grooves based on the disc-type processing tool. The present invention is applied to the technical field of processing fine fixtures.

Description

Technical Field

[0001] The present invention is applied to the technical field of processing small fixtures, and particularly relates to a sheet-type processing tool and a processing method thereof. Background Art

[0002] Today's mobile electronic products have been developing in the direction of refinement and long battery life. As a result, circuit boards are becoming smaller and smaller, the contact points on the circuit boards are becoming smaller and smaller, the spacing is becoming narrower, but the current passing through is also increasing. Conventional test needles are prone to breakage due to uneven force due to structural limitations, and the strength cannot meet more sophisticated testing requirements. For this reason, sheet needles for small gap testing have appeared on the market, which include a contact tip, a wavy connecting part and a female end that are integrally formed in sequence. The sheet needle is in the shape of a thin sheet with a thickness of 0.1mm to 1mm. The thin sheet structure makes the installation more stable and adapts to the test environment with smaller spacing. The wavy connecting part can absorb impact force to prevent breakage. Such as Figure 1 As shown, the installation of the sheet needle requires several small-pitch connecting grooves for clamping and fixing. Traditional methods of processing connecting grooves are mostly milling cutter processing and wire cutting processing. In order to avoid current interference between the sheet needles, the fixing fixture uses insulating non-metallic material, so wire cutting cannot be used for processing; in addition, due to the small thickness and small gap of the sheet needle, a milling cutter of a specific size is required for processing. The limitation of the groove depth makes the blade length of the milling cutter much larger than the diameter of the blade part, which makes the blade part very easy to break, and only one connecting groove can be processed in a single processing. If the fixture needs to be grooved on both sides and the number of connecting grooves is large, the processing time of a single fixture is long and the production cost is too high. Summary of the invention

[0003] The technical problem to be solved by the present invention is to overcome the deficiencies of the prior art and provide a sheet-type machining tool and a machining method thereof which can perform small-pitch grooving with low machining cost, high efficiency and stable operation.

[0004] The technical solution adopted by the present invention is: the blade-type processing tool includes a tool handle, a fixed head and a plurality of saw blades, the plurality of saw blades are all mounted on the tool handle, the fixed head cooperates with the tool handle to clamp the plurality of saw blades, the fixed head is fixedly connected to the tool handle by a fixing screw, and a spacer is arranged between two adjacent saw blades.

[0005] It can be seen from the above scheme that the connection groove is processed by using a saw blade to saw and cut, and a spacer is set to leave a spacing between two adjacent saw blades, thereby processing a connection groove with a small spacing on the fixture. By setting up several saw blades at the same time, multiple connection grooves can be processed simultaneously, which effectively improves the production efficiency. By using a saw blade for grooving, it is possible to effectively avoid the lateral force breaking the tool during the processing due to the small diameter after processing, and at the same time reduce the production cost of the tool. During the sawing process, the saw blades will be pressed against each other through the side walls of the connection groove without any gap, and there will be no knife bouncing or vibration. The operation is stable and not easy to be damaged, and the qualified rate of the finished product is high. Due to the use of stacked sawing, the combination of blades is flexible and variable, ranging from 0.1mm thick to 1mm wide grooves, and there is no limit on the number of grooves, so more complex fixtures of this type can be sawed.

[0006] A preferred solution is that the fixing head is provided with a through hole matched with the maximum diameter of the threaded portion of the fixing screw, the through hole is a stepped hole, and the edge of one end of the through hole away from the tool handle is chamfered.

[0007] It can be seen from the above solution that the chamfered design enables the fixing screw to further limit the fixing head, thereby reducing the radial runout caused by production errors.

[0008] A preferred solution is that the knife handle is a stepped shaft, the saw blade is provided with a connecting hole matched with the small diameter end of the knife handle, and a plurality of the saw blades are sleeved on the small diameter end of the knife handle.

[0009] A preferred solution is that the saw blade is in a disc shape, a plurality of saw teeth are arranged on the outer edge of the saw blade, and the thickness of the saw blade is 0.1 mm to 1 mm.

[0010] It can be seen from the above solution that the thickness of the saw blade is set according to the needs of the product.

[0011] The processing method comprises the following steps:

[0012] A. assembling the sheet-type machining tool according to the number of sheet needles to be clamped by the fixture, the thickness of the sheet needles and the spacing between the clamping grooves;

[0013] B. Install the saw blades of corresponding thickness into the handle in sequence, and put the fixing head on the handle so that the fixing head cooperates with the step on the handle to limit the position of all the saw blades, and tighten the fixing screw so that the fixing head presses all the saw blades tightly;

[0014] C. Clamping the assembled sheet-type processing tool on the processing equipment;

[0015] D. The external CNC machine tool performs fine machining of the five surfaces of the fixture and rough machining of the slotted surface, and the processing equipment drives the sheet-type processing tool to perform a primary slotting of 0.2 mm depth, a secondary slotting of 0.5 mm depth, and intermittent sawing of the remaining part on the slotted surface of the fixture, wherein the sawing depth of the remaining part is greater than the set slotting depth minus the first two slotting depths;

[0016] E. After the groove is completed, the groove surface is milled to make the groove depth reach the set value.

[0017] It can be seen from the above scheme that by adopting the horizontal saw cutting method, all the grooves on the same slotted surface can be processed at one time, and the processing time is short. During the sawing process, the saw blades will be pressed against each other without gaps, and there will be no knife bounce or vibration, and the qualified rate of the finished product is high. In addition, because it is a stacked sawing, the blade combination is flexible, and grooves from 0.1mm thick to 1mm wide can be sawed at the same time, and there is no limit on the number of grooves, so more complex parts of this type can be sawed. Compared with the traditional milling process, the processing cost is lower, the strength requirements of the tool are lower, the tool production cost is low, and it also has the characteristics of high processing efficiency. At the same time, the milling of the slotted surface that is rough-machined at the end can ensure the surface flatness of the cover surface, and at the same time provide a processing allowance to provide a compensatory space for errors caused by processing.

[0018] A preferred solution is that step D also includes the following: first groove the finishing surface of the fixture away from the groove surface, and use the sheet-type processing tool to perform initial grooves with a depth of 0.2 mm, secondary grooves with a depth of 0.5 mm, and intermittent sawing to the remaining set depth.

[0019] It can be seen from the above scheme that for the double-sided slotting fixture, the fine-machined surface of the fixture away from the slot surface is slotted first, and the slotted fine-machined surface is used as a reference, and then the reserved amount of the rough-machined surface is used to correct the product error and ensure the quality of the product. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a three-dimensional structural schematic diagram of the film needle fixture;

[0021] Figure 2 It is a three-dimensional structural schematic diagram of the present invention;

[0022] Figure 3 It is a schematic diagram of the decomposed structure of the present invention from a first viewing angle;

[0023] Figure 4 It is a schematic diagram of the decomposition structure of the second viewing angle of the present invention. DETAILED DESCRIPTION

[0024] like Figures 2 to 4As shown, in this embodiment, the blade processing tool comprises a handle 1, a fixed head 2 and a plurality of saw blades 3, and the plurality of saw blades 3 are all sleeved on the handle 1, and the fixed head 2 cooperates with the handle 1 to clamp the plurality of saw blades 3, and the fixed head 2 is fixedly connected to the handle 1 through a fixing screw. A spacer 4 is provided between two adjacent saw blades 3. The fixed head 2 is provided with a through hole 5 that matches the maximum diameter of the threaded portion of the fixing screw, and the through hole 5 is stepped, and the edge of the through hole 5 away from the handle 1 is chamfered. The handle 1 is a stepped shaft, and the saw blade 3 is provided with a connecting hole that matches the small diameter end of the handle 1, and the plurality of saw blades 3 are sleeved on the small diameter end of the handle 1. The saw blade 3 is disc-shaped, and the outer edge of the saw blade 3 is provided with a plurality of saw teeth, and the thickness of the saw blade 3 is 0.1mm to 1mm.

[0025] The processing method comprises the following steps:

[0026] A. assembling the sheet-type machining tool according to the number of sheet needles to be clamped by the fixture, the thickness of the sheet needles and the spacing between the clamping grooves;

[0027] B. Install the saw blades 3 of corresponding thickness into the handle 1 in sequence, and put the fixing head 2 on the handle 1, so that the fixing head 2 cooperates with the step on the handle 1 to limit all the saw blades 3, and tighten the fixing screws so that the fixing head 2 presses all the saw blades 3 tightly;

[0028] C. Clamping the assembled sheet-type machining tool on the machining equipment;

[0029] D. The external CNC machine tool performs fine machining of the five surfaces of the fixture and rough machining of the slotted surface. The fine machining surface of the fixture far from the slotted surface is slotted first, and the sheet-type machining tool performs the initial slotting of 0.2 mm, the secondary slotting of 0.5 mm, and intermittent sawing of the remaining set slotting depth in sequence. The sheet-type machining tool is driven by the machining equipment to perform the initial slotting of 0.2 mm, the secondary slotting of 0.5 mm, and intermittent sawing of the remaining part on the slotted surface of the fixture in sequence, wherein the sawing depth of the remaining part is greater than the set slotting depth minus the first two slotting depths;

[0030] E. After the groove is completed, the groove surface is milled to make the groove depth reach the set value.

Claims

1. A processing method for a sheet-type processing tool, characterized in that: The blade processing tool comprises a tool handle (1), a fixed head (2) and a plurality of saw blades (3), wherein the plurality of saw blades (3) are sleeved on the tool handle (1), the fixed head (2) cooperates with the tool handle (1) to clamp the plurality of saw blades (3), the fixed head (2) is fixedly connected to the tool handle (1) by a fixing screw, and a spacer (4) is provided between two adjacent saw blades (3); the fixed head (2) is provided with a through hole (5) matched with the maximum diameter of the threaded portion of the fixing screw, the through hole (5) is a stepped hole, and the edge of one end of the through hole (5) away from the tool handle (1) is chamfered; the saw blade (3) is disc-shaped, and the outer edge of the saw blade (3) is provided with a plurality of saw teeth, and the thickness of the saw blade (3) is 0.1 mm to 1 mm; The processing method comprises the following steps: A. assembling the sheet-type machining tool according to the number of sheet needles to be clamped by the fixture, the thickness of the sheet needles and the spacing between the clamping grooves; B. inserting the saw blades (3) of corresponding thickness into the knife handle (1) in sequence, and sleeve the fixing head (2) on the knife handle (1), so that the fixing head (2) cooperates with the step on the knife handle (1) to limit the position of all the saw blades (3), and tightening the fixing screw so that the fixing head (2) presses all the saw blades (3) tightly; C. Clamping the assembled sheet-type machining tool on the machining equipment; D. The external CNC machine tool performs fine machining of the five surfaces of the fixture and rough machining of the slotted surface. The processing equipment drives the sheet-type processing tool to first slot the fine machining surface of the fixture away from the slotted surface, and then performs the initial slotting of 0.2mm depth, the secondary slotting of 0.5mm depth, and the intermittent sawing of the remaining part on the slotted surface of the fixture, wherein the sawing depth of the remaining part is greater than the set slotting depth minus the first two slotting depths; E. After the groove is completed, the groove surface is milled to make the groove depth reach the set value.

2. The processing method according to claim 1, characterized in that: The knife handle (1) is a stepped shaft, the saw blade (3) is provided with a connection hole adapted to the small diameter end of the knife handle (1), and a plurality of the saw blades (3) are sleeved on the small diameter end of the knife handle (1).

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