Laser cutting pdc / pcbn compact tooling fixture and method

Abstract

The application discloses a laser cutting PDC / PCBN composite sheet into a tool tooth jig and method, comprising a four-jaw chuck installed on a laser cutting workbench, and a bottom plate clamped between the reverse claws of the four-jaw chuck, a plurality of partitions are arranged on the left and right sides of the bottom plate, PDC / PCBN composite sheet strips are clamped between two partitions, the PDC / PCBN polycrystal layers on each PDC / PCBN composite sheet strip are towards the left or right side, the first clamps are clamped between the left and right partitions and the corresponding reverse claws, and the second clamps are clamped between the front and rear ends of each partition and the corresponding reverse claws. The application adopts a lateral machining method, can cut the PDC / PCBN composite sheet strip into a plurality of tool teeth meeting the requirements of the blade angle at one time, does not need to grind the tool tooth blade angle with a large grinding amount subsequently, and avoids the loss of the diamond grinding wheel.

Description

TECHNICAL FIELD

[0001] The application relates to a laser cutting PDC / PCBN composite sheet manufacturing cutter tooth technology, in particular to a laser cutting PDC / PCBN composite sheet tool clamp and method. BACKGROUND

[0002] The PDC composite sheet and the PCBN composite sheet are sintered from diamond powder and cubic boron nitride powder and a hard alloy substrate under superhigh pressure and high temperature, and have high hardness, high wear resistance and thermal conductivity, and also have the strength and impact toughness of the hard alloy, and are ideal materials for manufacturing cutting tools, drilling bits and other wear-resistant tools.

[0003] The existing cutting clamp and method can only cut the disc-shaped PDC composite sheet or PCBN composite sheet into a rectangular block (a right-angle cutter tooth) in a forward direction, and the cutter tooth cannot meet the blade angle requirement of the cutter, and needs subsequent large-grinding-amount grinding and then precision grinding to meet the use requirement; since the blade part of the cutter tooth is PDC polycrystal or PCBN polycrystal, the diamond grinding wheel is greatly consumed during grinding, and in order to avoid the diamond grinding wheel from being broken, the grinding feed amount needs to be controlled to be very small, so that the blade angle grinding consumes a long time. SUMMARY

[0004] In view of the defects of the prior art, the application aims to provide a laser cutting PDC / PCBN composite sheet tool clamp and method without grinding the blade angle of the cutter tooth.

[0005] The laser cutting PDC / PCBN composite sheet tool clamp which can solve the above technical problems comprises a four-jaw chuck mounted on a laser cutting workbench, and further comprises a bottom plate clamped between the reverse jaws at the front, rear, left and right of the four-jaw chuck, a plurality of partitions are arranged on the bottom plate and spaced apart left and right, PDC / PCBN composite sheet strips are clamped between every two partitions, the PDC / PCBN polycrystal layers on each PDC / PCBN composite sheet strip face the left side or the right side, first clamping plates are clamped between the partitions on the left side and the reverse jaws on the corresponding side, and second clamping plates are clamped between the partitions on the front and rear ends and the reverse jaws on the corresponding side.

[0006] The laser cutting PDC / PCBN composite sheet method using the tool clamp comprises the following steps:

[0007] 1. Cutting the PDC / PCBN composite sheet with the PDC / PCBN polycrystal layer facing upwards into a plurality of PDC / PCBN composite sheet strips.

[0008] 2. Rotate each PDC / PCBN composite sheet cut strip by 90° so that the PDC / PCBN polycrystalline layer of each PDC / PCBN composite sheet cut strip faces to the left or right.

[0009] 3. Place the PDC / PCBN composite sheet strips with their orientation changed sequentially between the spaced partitions on the base plate.

[0010] 4. Use a four-jaw chuck to clamp the base plate and simultaneously clamp each partition and each PDC / PCBN composite sheet strip through the first clamping plates on the left and right and the second clamping plates on the front and rear.

[0011] 5. Develop a program to laterally cut each PDC / PCBN composite sheet into several angled or curved teeth using laser positioning.

[0012] Furthermore, several cutting teeth are welded to the tool base, and after simple fine grinding, the requirements for use can be met.

[0013] The beneficial effects of this invention are:

[0014] 1. The present invention relates to a laser cutting fixture and method for PDC / PCBN composite sheets, which adopts a side-processing method. It can cut PDC / PCBN composite sheet strips into multiple cutting teeth that meet the cutting angle requirements in one go (the side angle of the cutting edge of the cutting teeth can be pre-processed). There is no need for subsequent grinding of the cutting edge angle of the cutting teeth with a large amount of grinding, which avoids the wear of diamond grinding wheels and greatly improves the efficiency of cutting teeth production. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of one embodiment of the present invention.

[0016] Figure 2 for Figure 1 AA sectional view in the implementation method.

[0017] Figure 3(a) is a schematic diagram of cutting a circular PCBN composite sheet into PDC / PCBN composite sheet strips.

[0018] Figure 3(b) is a sectional view of BB in Figure 3(a).

[0019] Figure 4 This is a schematic diagram of the PDC / PCBN composite sheet strip being rotated 90° in Figure 3(a).

[0020] Figure 5(a) shows Figure 4 The PDC / PCBN composite sheet in the first shape diagram is cut into multiple serrations.

[0021] Figure 5(b) shows Figure 4 The PDC / PCBN composite sheet in the middle is cut into a second shape with multiple serrations.

[0022] Figure 5(c) is a third shape diagram of the PDC / PCBN compact strip being cut into multiple teeth. Figure 4

[0023] Figure number identification: 1, four-jaw chuck; 1-1, reverse claw; 2, base plate; 3, partition plate; 4, first clamping plate; 5, PDC / PCBN compact strip; 5-1, PDC / PCBN polycrystal layer; 6, second clamping plate; 7, PDC / PCBN compact; 8, tooth. DETAILED DESCRIPTION

[0024] The technical solutions of the present application will be further described below in combination with the embodiments shown in the drawings.

[0025] The laser cutting PDC / PCBN compact tool fixture of the present application comprises a four-jaw chuck 1, a base plate 2, a partition plate 3, a first clamping plate 4 and a second clamping plate 6, the four-jaw chuck 1 is installed on a laser cutting workbench, and front, rear, left and right four reverse claws 1-1 are used to implement clamping, as shown in Figure 1 , Figure 2 .

[0026] The base plate 2 is clamped in the middle between the front, rear, left and right four reverse claws 1-1, seven front-to-back equal-length partition plates 3 are arranged equidistantly on the base plate 2 left and right, PDC / PCBN compact strips 5 are placed between the intervals of every two partition plates 3, the PDC / PCBN polycrystal layers 5-1 on each PDC / PCBN compact strip 5 are all towards the left side, the seven partition plates 3 and six PDC / PCBN compact strips 5 are in the upper part between the front, rear, left and right four reverse claws 1-1, the leftmost partition plate 3 and the left reverse claw 1-1 are clamped with the first clamping plate 4, the rightmost partition plate 3 and the right reverse claw 1-1 are clamped with the first clamping plate 4, the front end of the seven partition plates 3 and the front reverse claw 1-1 are clamped with the second clamping plate 6, and the rear end of the seven partition plates 3 and the rear reverse claw 1-1 are clamped with the second clamping plate 6, as shown in Figure 1 , Figure 2 .

[0027] The laser cutting PDC / PCBN compact method of the present application has the following process steps:

[0028] 1. A circular PDC / PCBN compact 7 (PDC / PCBN polycrystal layer 5-1 upwards) is cut into multiple PDC / PCBN compact strips 5, as shown in Figures 3(a) and 3(b).

[0029] 2. All PDC / PCBN compact strips 5 are rotated by 90°, so that the PDC / PCBN polycrystal layers 5-1 of each PDC / PCBN compact strip 5 are all towards the left side or the right side, as shown in Figure 4 .

[0030] ​3. The base plate 2 is clamped in the middle between the front, rear, left and right four claws 1-1 by the four-claw chuck 1.

[0031] 4. Seven partitions 3 are arranged equidistantly on the left and right of the base plate 2 (in the upper part between the front, rear, left and right four claws 1-1), and the front and rear ends of the seven partitions 3 are clamped with the front and rear claws 1-1, and the front and rear second clamps 6 position the seven partitions 3 in the front and rear directions.

[0032] 5. The five PDC / PCBN composite sheet strips 5 are placed between the partitions 3 on the base plate 2 in turn, and the leftmost partition 3 and the left claw 1-1, and the rightmost partition 3 and the right claw 1-1 are clamped with the first clamps 4, and the left and right first clamps 4 position the seven partitions 3 and the five PDC / PCBN composite sheet strips 5 in the left and right directions.

[0033] 6. Program the laser to walk and cut the five PDC / PCBN composite sheet strips 5 into a plurality of teeth 8 with angles or radians (with a margin of 0.10mm), as shown in Figures 5(a), 5(b) and 5(c).

[0034] 7. Weld a plurality of teeth 8 to the tool body, and simple grinding with a 240-mesh diamond grinding wheel can meet the use requirements.

[0035] As shown in Figure 5(a), the PDC / PCBN polycrystalline layer is the same as the milling cutter tooth 8.

[0036] As shown in Figure 5(b), the PDC / PCBN polycrystalline layer has different thicknesses on the top and bottom.

[0037] As shown in Figure 5(c), the PDC / PCBN polycrystalline layer has a circular arc chip removal groove in the middle.

Claims

1. A method of laser cutting a PDC / PCBN compact, characterised in that The utility model discloses a laser cutting PDC / PCBN composite piece tool fixture, which comprises a four-jaw chuck (1) installed on a laser cutting workbench, and further comprises a bottom plate (2) clamped between the reverse claws (1-1) at the front, back, left and right of the four-jaw chuck (1), a plurality of partition plates (3) are arranged on the bottom plate (2) and spaced apart left and right, a PDC / PCBN composite piece strip (5) is clamped between every two partition plates (3), the PDC / PCBN polycrystal layer (5-1) on each PDC / PCBN composite piece strip (5) faces the left side or the right side, the left and right partition plates (3) and the corresponding reverse claws (1-1) are respectively clamped with a first clamping plate (4), and the front and back ends of each partition plate (3) and the corresponding reverse claws (1-1) are respectively clamped with a second clamping plate (6). The process steps are as follows: ①, the PDC / PCBN composite piece (7) with the PDC / PCBN polycrystal layer (5-1) facing upwards is cut into a plurality of PDC / PCBN composite piece strips (5); ②, each PDC / PCBN composite piece strip (5) is rotated by 90°, so that the PDC / PCBN polycrystal layer (5-1) of each PDC / PCBN composite piece strip (5) faces the left side or the right side; ③, each PDC / PCBN composite piece strip (5) with the changed orientation is sequentially arranged between the spaced partition plates (3) on the bottom plate (2); ④, the bottom plate (2) is clamped by the four-jaw chuck (1), and each partition plate (3) and each PDC / PCBN composite piece strip (5) are clamped by the left and right first clamping plates (4) and the front and back second clamping plates (6) at the same time; ⑤, a program is compiled, and each PDC / PCBN composite piece strip (5) is laterally cut into a plurality of toothed blades (8) with angles or radians by laser walking; ⑥, the plurality of toothed blades (8) are welded to a cutter base body, and the use requirement can be reached after simple precision grinding.

Images