CN106825658A - A kind of thin plate into wait wall thickness deep hole technique - Google Patents

Abstract

It is a process of forming deep holes with equal wall thickness on thin plates. The disc with a tapered through hole is placed on the horizontal workbench of the drilling machine, and the center of the disc is coincident with the center of the drill bit, and the T-shaped groove at the bottom of the disc is aligned with the center of the drill Align the position of the T-slot of the workbench, and then use the I-shaped block to fix the disc and the workbench together, so as to fix the specified position of the disc during drilling; select a suitable hole with a tapered outer circular surface Put the hole sleeve into the tapered through hole of the disc, and ensure that the center of the hole sleeve coincides with the center of the disc; fix the thin plate workpiece at the specified drilling position through the fixture, and at the same time ensure that the center of the hole, the drill bit The center, the center of the hole sleeve, and the center of the disc are consistent; when the drilling machine is started, when the drill bit rotates downward during the drilling process, the heat is generated by the rotational friction between the edgeless drill bit and the sheet, and the material in the hole-forming area is heated up first. Softening, reducing its deformation resistance, and then penetrating into holes to obtain holes with uniform wall thickness and deeper than the thickness of the plate.

Description

A technology of thin plate forming deep hole with equal wall thickness

technical field

The invention relates to a thin plate hole forming process, in particular to a process for making the wall thickness of the formed hole uniform when forming a deep hole in a thin plate.

Background technique

In the field of mechanical engineering technology, in many cases, it is necessary to drill holes in equipment, facilities or their parts. Thin plate deep hole processing is a green special processing method that is different from traditional hole processing methods. It uses the thermoplasticity of the metal itself to process holes in the metal sheet, and generates heat through the rotational friction between the edgeless drill bit and the sheet metal. First, the material in the hole-forming area is heated and softened to reduce its deformation resistance, and then penetrates into the hole. Depending on the thickness of the plate and the diameter of the drill, the depth of the resulting hole is about 3-4 times the thickness of the plate.

Due to the current deep hole forming process of thin plates, the wall thickness of the formed holes is not improved in most cases, so that the wall thickness of the processed holes is different, and the inconsistent wall thickness also causes the inner diameter. Defects such as poor performance. Therefore, while the material is fully utilized in the present invention, a reasonable streamline distribution and good mechanical properties can be obtained in the hole-forming area of the workpiece, and finally the comprehensive performance of the hole is improved.

Contents of the invention

The present invention aims at the deficiencies of the above-mentioned prior art, and proposes a manufacturing process of thin plates forming deep holes with equal wall thickness.

The manufacturing process of equal wall thickness deep hole of the present invention, step is as follows:

The first step is to place the disc with a tapered through hole on the horizontal workbench of the drilling machine, and ensure that the center of the disc coincides with the center of the drill bit, and that the T-slot at the bottom of the disc is in alignment with the T-slot of the workbench. Then use the I-shaped block to fix the disc and the worktable together, so as to fix the specified position of the disc during drilling.

The second step is to select a suitable hole sleeve with a tapered outer surface, put the hole sleeve into the tapered through hole of the disc, and ensure that the center of the hole sleeve coincides with the center of the disc.

The third step is to fix the thin plate workpiece at the specified drilling position through the fixture, and at the same time ensure that the center of the hole, the center of the drill bit, the center of the hole sleeve and the center of the disc of the thin plate workpiece are consistent.

The fourth step is to start the drilling machine. When the drill bit rotates downward during the drilling process, the heat is generated by the friction between the edgeless drill bit and the sheet metal. First, the material in the hole-forming area is heated and softened to reduce its deformation resistance, and then penetrates into the hole. Hole, to obtain a hole with uniform wall thickness and a hole with a depth greater than the thickness of the plate.

Wherein, before the second step, the hole sleeve of the corresponding hole diameter is selected according to the hole size of the thin plate hole and the size of the drill bit.

Preferably, considering the interaction between the drill bit and the hole sleeve after the hole is formed, the wall thickness of the hole is consistent, so in order to ensure that the hole sleeve is not thermally deformed, the material of 1cr25ni20si2 is selected. This material has higher high temperature strength and oxidation resistance , belongs to austenitic heat-resistant stainless steel. The high temperature is 800° without oxidation, the working temperature is 1020°, and the rated service temperature is 1150°. It can withstand high working temperature during the drilling process and can sufficiently ensure the stability of the hole forming process.

The beneficial effect of the invention is that: while the material is fully utilized, the invention can obtain a reasonable streamline distribution and good mechanical properties in the hole forming area of the workpiece, and finally improve the comprehensive performance of the hole parts.

Description of drawings

Accompanying drawing 1 is the schematic front view of the main structure in the manufacturing process of the present invention.

Accompanying drawing 2 is the left view diagram of main structure in the manufacturing process of the present invention.

Accompanying drawing 3 is the structure schematic diagram when the socket and the disk cooperate in the manufacturing process of the present invention.

In the figure: 1-machine tool table, 2-fixture, 3-drill, 4-thin plate workpiece, 5-hole sleeve, 6-disc, 7 I-shaped block.

detailed description

The manufacturing process of equal wall thickness deep hole of the present invention, step is as follows:

The first step is to place the disk 6 with a tapered through hole on the horizontal machine table 1 of the drilling machine, and ensure that the center of the disk 6 coincides with the center of the drill bit 3, and the T-shaped groove at the bottom of the disk 6 is aligned with the machine tool. The T-shaped groove of the workbench 1 is aligned, and then the disc 6 and the machine tool workbench 1 are fixed together by the I-shaped block 7, thereby fixing the exact position of the disc 6 when drilling.

The second step is to select a suitable hole sleeve 5 with a tapered outer surface, put the hole sleeve 5 into the tapered through hole of the disc 6, and ensure that the center of the hole sleeve 5 coincides with the center of the disc 6 .

In the third step, the thin plate workpiece 4 is fixed at the predetermined drilling position by the clamp 2, while ensuring that the hole forming center of the thin plate workpiece 4, the center of the drill bit 3, the center of the hole sleeve 5 and the center of the disc 6 are consistent.

The fourth step is to start the drilling machine. When the drill bit 3 rotates downward during the drilling process, heat is generated by the rotational friction between the edgeless drill bit 3 and the thin plate workpiece 4. First, the material in the hole-forming area is heated and softened to reduce its deformation resistance. Then penetrate through to form a hole to obtain a hole with a uniform wall thickness and a hole with a depth greater than the thickness of the plate. While the material is fully utilized, the hole-forming area of the thin-plate workpiece 4 has a reasonable streamline distribution and good mechanical properties, and finally improves the comprehensive performance of the hole parts.

Claims (2)

1. a kind of thin plate becomes equal wall thickness deep hole technology, it is characterized in that, step is as follows: Step 1: Place the disk with a tapered through hole on the machine tool workbench, and make the center of the disk coincide with the center of the hole on the machine tool workbench, so as to ensure that the center of the disk coincides with the center of the drill bit, and then make the circle The T-shaped slot at the bottom of the disc is aligned with the T-slot of the machine tool table, and the disc and the machine tool table are fixed together by the I-shaped block, so that the disc is fixed at the predetermined position during drilling; Step 2: Select a suitable hole sleeve with a conical outer surface, put the hole sleeve into the tapered through hole of the disc, and ensure that the center of the hole sleeve coincides with the center of the disc; The third step is to fix the thin plate workpiece at the specified drilling position through the fixture, and at the same time ensure that the hole forming center of the thin plate workpiece, the center of the drill bit, the center of the hole sleeve and the center of the disc are consistent; The fourth step is to start the drilling machine. When the drill bit rotates downward during the drilling process, heat is generated by the rotational friction between the edgeless drill bit and the sheet material. First, the material in the hole-forming area is heated and softened to reduce its deformation resistance, and then penetrates into the hole. Hole, to obtain a hole with uniform wall thickness and a hole with a depth greater than the thickness of the plate. 2. The thin plate forming equal wall thickness deep hole process according to claim 1 is characterized in that a larger tapered through hole is opened on the disc, and the hole sleeves and holes of different inner holes can be selected according to the workpieces of different apertures. Disc fit.