Brazing forming manufacturing method for multiple layers of disc sheets of valve plate

Abstract

The invention belongs to the technical field of valve plate manufacturing and machining, and provides a multi-layer plate copper welding forming manufacturing method of a valve plate, which realizes manufacturing of parts with unconventional pore channels and saves the machining cost and time, and adopts the technical scheme that the method comprises the following steps of: dividing multi-layer plates according to the pore channel shape of the valve plate; each layer of disc is based on the condition that all the hole channels can be directly processed and formed, corresponding pin holes are formed in the same positions of the edges of all the discs, enough corresponding matched pins are prepared, all the discs are manufactured and processed, welding copper foils between the adjacent discs are prepared, the discs and the welding copper foils are sequentially stacked on a positioning sleeve in a sleeving mode, and the positioning sleeve is formed; a corresponding welding copper foil is arranged between every two adjacent discs, pins are nailed into all pin holes in the stacked multiple layers of discs, the fixed multiple layers of discs are fed into a sintering furnace to be subjected to high-temperature sintering brazing, the sintered valve plate is taken out to be subjected to air cooling, then machining is conducted according to assembly requirements, and finally airtightness detection is conducted.

Description

Technical Field

[0001] The invention discloses a method for manufacturing a multi-layer disc brazing of a distribution plate, which belongs to the technical field of manufacturing and processing distribution plates, and mainly relates to layered brazing of distribution plates with unconventional channels. Background Art

[0002] The valve plate is a device used to control and distribute fluids. Its main function is to provide channels for pumps to absorb and discharge oil and to separate high-pressure and low-pressure oil chambers. It is widely used in chemical, petroleum, energy, pharmaceutical and other industries. The structural design of the distribution plate has an important impact on its function. The types and specifications of distribution plates required by different industries and different processes will also be different. The appropriate distribution plate should be selected according to actual needs.

[0003] The valve plate is usually made of copper and gold or powder metallurgy. It is a thin disc-type part that not only has suction and discharge windows, but also has complex oil channels designed to meet higher pressure requirements. In addition, the valve plate design also includes damping grooves or damping holes. These structures assist the plunger cavity in increasing pressure through a small damping channel when the cylinder plunger cavity transitions from suction to discharge, further improving the pressure pulsation of the pump. This design not only improves the performance of the pump, but also extends its service life.

[0004] However, due to the design requirements of pressure and flow factors, the internal channels of the distribution plate are sometimes designed as unconventional channels, that is, the flow cross-section of the channel chamber changes, non-vertical settings, etc., which makes the processing of the distribution plate more difficult and even impossible to produce using conventional processing methods. Figure 1 The figure shows a distribution plate with an unconventional window channel. The channel A is a complex through-hole channel. Figure 1 The front and back sides are different, and the interior is connected by multiple channels with different cross-sections (such as Figure 2 For example, the multiple sections of 1#-6# in the figure, the cross-sections of the cavity of channel A are all different). For example, channel B is a blind hole channel, which is composed of two blind holes connected at the bottom, with two windows on the front and no window on the back. Channels like A and B cannot be drilled, and direct casting cannot guarantee their accuracy, so it becomes a major problem in production and manufacturing. Summary of the invention

[0005] In order to solve one of the above technical defects, the present invention provides a method for copper welding and forming a multi-layer disc of a distribution plate, which realizes the manufacturing of parts with unconventional channels and saves processing costs and time.

[0006] In order to solve the above technical problems, the technical solution adopted by the present invention is: a method for manufacturing a multi-layer disc of a distribution disc by brazing, comprising the following steps: S1. Divide the discs into multiple layers according to the shape of the channels of the distribution disc. Each layer of discs is based on the fact that all channels can be directly processed and formed. Set corresponding pin holes at the same position on the edge of all discs, and prepare sufficient corresponding matching pins. The material of the pins is exactly the same as that of the distribution disc. S2, manufacture and process all the discs, and prepare the copper foil for welding between adjacent discs; S3, stacking the discs and the welding copper foil on the positioning sleeve in sequence, so that the pin holes at the same position correspond to each other, and there is a corresponding welding copper foil between every two adjacent discs; S4, driving pins into all the pin holes on the stacked multi-layer discs; S5, sending the fixed multi-layer disc into a sintering furnace for high-temperature sintering and brazing, adjusting the sintering furnace temperature to 1100-1200°C, and the sintering time to 40-60 minutes; S6, taking out the sintered distribution plate and air cooling it; S7. Process the inner hole, disk surface and outer edge of the distribution plate according to assembly requirements; S8. Perform air tightness test on the finished distribution plate.

[0007] The size and shape of each welded copper foil in step S2 are completely consistent with the two disc bonding surfaces on which it is located.

[0008] The thickness of the welding copper foil is 0.1 mm.

[0009] The thickness error of the welded copper foil is within ±0.002 mm, and the surface roughness is above Ra0.8.

[0010] The temperature of the high temperature sintering brazing in step S5 is 1150° C., and the sintering time is 50 minutes.

[0011] The step S1 divides the distribution disc into a center sleeve, the step S2 manufactures and processes the center sleeve at the same time, and the step S3 uses the center sleeve as a positioning sleeve. In the step S5, the fixed center sleeve and the multi-layer disc are all sent to the sintering furnace for high-temperature sintering and brazing.

[0012] By adopting the multi-layer disc copper welding molding manufacturing method of the distribution plate provided by the present invention, the distribution plate is layered and processed, and then high-temperature brazing with copper foil is used to shape it, thereby realizing the manufacturing of parts with unconventional channels, reducing the processing difficulty, and saving processing costs and time. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] The present invention will be further described in detail below in conjunction with the accompanying drawings; Figure 1 It is a double-sided schematic diagram of a distribution plate in the background technology; Figure 2Schematic diagram of different cross sections of the distribution plate in the background technology. DETAILED DESCRIPTION

[0014] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below in combination with the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all the embodiments; based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0015] The present invention provides a method for manufacturing a multi-layer plate of a distribution plate by copper welding, comprising the following steps: S1. Divide the multi-layer discs according to the shape of the channels of the distribution disc. Each layer of discs is based on the fact that all channels can be directly processed and formed. Figure 1-2 The distribution plate shown can be divided into the following types according to the shapes of the channels A and B: Figure 2 There are six layers of discs 1#-6# shown in the figure, each layer of discs has different channel shapes and sizes, corresponding pin holes 1 are set at the same position on the edge of all discs, and sufficient corresponding matching pins are prepared, and the material of the pins is exactly the same as that of the distribution disc; S2. Manufacture and process all the discs, prepare the copper foil for welding between adjacent discs, the size and shape of each copper foil for welding is completely consistent with the bonding surface of the two discs where it is located, the thickness of the copper foil for welding is 0.1mm, the thickness error of the copper foil for welding is within ±0.002mm, and the surface roughness is above Ra0.8; S3, stacking the discs and the welding copper foil on the positioning sleeve in sequence to achieve axial positioning, so that the pin holes 1 at the same position correspond to each other, and there is a corresponding welding copper foil between every two adjacent discs, that is, there is welding copper foil on all the fitting surfaces of the discs; S4, driving pins into all the pin holes 1 on the stacked multi-layer discs to position the discs circumferentially; S5, sending the fixed multi-layer disc into a sintering furnace for high-temperature sintering and brazing, adjusting the sintering furnace temperature to 1100-1200°C, and the sintering time to 40-60 minutes; S6, taking out the sintered distribution plate and air cooling it; S7. Process the inner hole, disk surface and outer edge of the distribution plate according to assembly requirements, and remove pin residues and burrs; S8. Carry out air tightness test on the finished distribution plate. If there are no holes in the channels and the air tightness meets the standard, it is qualified.

[0016] The temperature of the high temperature sintering brazing in step S5 is 1150° C., and the sintering time is 50 minutes.

[0017] The step S1 divides the distribution disc into a center sleeve 2, the center sleeve 2 is manufactured and processed at the same time in step S2, and the center sleeve 2 is used as a positioning sleeve in step S3. In step S5, the fixed center sleeve 2 and the multi-layer disc are all sent to the sintering furnace for high-temperature sintering and brazing, which can avoid displacement of the stacked and fixed discs when they are removed from the positioning sleeves.

[0018] The present invention only uses Figure 1-2 The distribution plate shown in the figure is for explanation and not limitation. According to the actual product situation, if there are more than two complex channels in the product production, the number of disc layers and shapes are divided according to the design requirements, and all channels can be directly processed and formed.

[0019] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A method for manufacturing a multi-layer plate of a distribution plate by copper welding, characterized in that The steps include: S1. Divide the discs into multiple layers according to the shape of the channels of the distribution disc. Each layer of discs is based on the fact that all channels can be directly processed and formed. Set corresponding pin holes at the same position on the edge of all discs, and prepare sufficient corresponding matching pins. The material of the pins is exactly the same as that of the distribution disc. S2, manufacture and process all the discs, and prepare the copper foil for welding between adjacent discs; S3, stacking the discs and the welding copper foil on the positioning sleeve in sequence, so that the pin holes at the same position correspond to each other, and there is a corresponding welding copper foil between every two adjacent discs; S4, driving pins into all the pin holes on the stacked multi-layer discs; S5, sending the fixed multi-layer disc into a sintering furnace for high-temperature sintering and brazing, adjusting the sintering furnace temperature to 1100-1200°C, and the sintering time to 40-60 minutes; S6, taking out the sintered distribution plate and air cooling it; S7. Process the inner hole, disk surface and outer edge of the distribution plate according to assembly requirements; S8. Perform air tightness test on the finished distribution plate.

2. The method for manufacturing a multi-layer plate of a distributor plate by brazing according to claim 1, characterized in that: The size and shape of each welded copper foil in step S2 are completely consistent with the two disc bonding surfaces on which it is located.

3. The method for manufacturing a multi-layer plate of a distributor plate by brazing according to claim 1, characterized in that: The thickness of the welding copper foil is 0.1 mm.

4. The method for manufacturing a multi-layer plate of a distributor plate by brazing according to claim 3, characterized in that: The thickness error of the welded copper foil is within ±0.002 mm, and the surface roughness is above Ra0.

8.

5. The method for brazing and forming a multi-layer plate of a distributor plate according to claim 1, characterized in that: The temperature of the high temperature sintering brazing in step S5 is 1150° C., and the sintering time is 50 minutes.

6. The method for manufacturing a multi-layer plate of a distributor plate by brazing according to claim 1, characterized in that: The step S1 divides the distribution disc into a center sleeve, the step S2 manufactures and processes the center sleeve at the same time, and the step S3 uses the center sleeve as a positioning sleeve. In the step S5, the fixed center sleeve and the multi-layer disc are all sent to the sintering furnace for high-temperature sintering and brazing.

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