Double-sided synchronous grinding device and method for orifice plate parts

Abstract

The present invention relates to a double-sided synchronous grinding device and method for orifice plate parts, including a transmission unit, a magnetic grinding unit, and a fixture. The two sides of the fixture are respectively provided with transmission units, and the transmission unit is used to drive the magnetic grinding unit to move horizontally and vertically; the transmission unit includes a cross screw guide rail slide and a pole disk support frame, and the cross screw guide rail slide drives the pole disk support frame to move horizontally and vertically; the magnetic grinding unit includes a pole disk connected to a servo motor through a coupling, and a pole group clamped on the pole disk; the workpiece is vertically fixed by the fixture and placed between two symmetrical pole groups, and a gap is left for filling magnetic abrasive particles. The advantages are: it is suitable for finishing processing of high-hardness, high-performance non-magnetic thin plate orifice parts, especially for finishing processing of fine and dense group holes. The device of the present invention has a simple structure, flexible and convenient clamping and positioning, and low manufacturing cost.

Description

Technical Field

[0001] The invention belongs to the field of processing plate parts with holes, and in particular relates to a double-sided synchronous grinding device and method for plate parts with holes. Background Art

[0002] As an important component, orifice plates are widely used in the fields of aviation manufacturing, industry, ships, and national defense. For example, turbine blades of gas turbines and heat shields of combustion chambers and afterburner chambers of aircraft engines. However, the presence of burrs on the edge of the holes often causes premature wear on the surface of related parts, shortens service life, reduces reliability, and even causes product failure, greatly reducing the safety, reliability, and stability of the equipment, making it impossible to guarantee the normal operation of the entire equipment. Therefore, burr removal is particularly important. The main methods for removing burrs from orifice plates include manual grinding and chemical corrosion, but there are generally problems such as low burr removal efficiency, poor removal quality consistency, and easy generation of new defects, especially when operated manually, the working environment is poor and the work intensity is high. Summary of the invention

[0003] In order to overcome the shortcomings of the prior art, the purpose of the present invention is to provide a double-sided synchronous grinding device and method for orifice plate parts, which is suitable for grinding and processing non-magnetic thin plate orifice parts with high hardness and high performance, and finishing its fine and dense group holes. It adopts magnetic particle grinding and finishing technology, cooperates with motor control, and performs double-sided grinding and processing on the workpiece at the same time, which can not only remove the burrs on the edge of the hole, but also will not damage the edge of the hole, and can also effectively grind and polish the inner surface of the hole. Solve some difficult problems for removing burrs on orifice plates, especially dense orifice plates.

[0004] To achieve the above object, the present invention is implemented through the following technical solutions:

[0005] A double-sided synchronous grinding device for a hole plate, comprising a transmission unit, a magnetic grinding unit, and a fixture, wherein transmission units are respectively arranged on both sides of the fixture, and the transmission units are used to drive the magnetic grinding unit to move horizontally and vertically;

[0006] The transmission unit includes a cross screw guide rail slide and a magnetic pole disk support frame, and the cross screw guide rail slide drives the magnetic pole disk support frame to move horizontally and vertically;

[0007] The magnetic grinding unit comprises a magnetic pole plate connected to a servo motor via a coupling, and a magnetic pole group clamped on the magnetic pole plate; the workpiece is vertically fixed by a fixture and placed between two symmetrical magnetic pole groups, leaving a gap for filling magnetic abrasive particles.

[0008] The magnetic pole disks are symmetrically distributed and keep coaxial movement during grinding.

[0009] The magnetic pole groups are arranged symmetrically, and are composed of a plurality of magnetic poles. The magnetic poles are evenly distributed on the magnetic pole disk, and the magnetic poles are arranged in a staggered manner with N and S poles. The magnetic pole groups on the relatively arranged magnetic pole disks are arranged in a one-to-one correspondence between N poles and S poles.

[0010] A double-sided synchronous grinding method for an orifice plate member comprises the following steps:

[0011] 1) Mix the abrasive and the grinding liquid in a volume ratio of 1:3 and stir evenly, and adsorb them on the magnetic pole; the abrasive is sintered by aluminum oxide and iron powder in a mass ratio of 1:2, the abrasive particle size is 40-120 mesh, and the grinding liquid is a water-based grinding liquid;

[0012] 2) The workpiece is fixed vertically by the fixture, so that the cross screw guide slide drives the motor to drive the two magnetic pole groups to move to the initial position of the processing area and keep the distance with the middle workpiece consistent. Through fine adjustment, the two magnetic pole disks are made coaxial, and then the workpiece is reliably positioned;

[0013] 3) During the processing, the two magnetic pole groups rotate in the same direction, but the speeds n1 and n2 are different. The speed n1 is constant, and the speed n2 is based on n1, in the form of "lead-lag-lag-lead", and changes periodically. During the change, the magnetic poles N and S always correspond to each other; the cross screw guide slide drives the motor to move longitudinally, driving the two magnetic pole groups to perform longitudinal grinding processing at the same moving speed at the same time, and then grind in the opposite direction to reach the initial position; this reciprocating processing is performed.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] The present invention is suitable for finishing processing of high-hardness, high-performance non-magnetic thin plate hole parts, especially for finishing processing of fine group holes. The device of the present invention has a simple structure, flexible and convenient clamping and positioning, and low manufacturing cost; during grinding processing, the workpiece is vertically fixed between two magnetic pole disks to achieve double-sided grinding processing, which greatly improves the grinding efficiency and effectively saves processing time; the magnetic poles are symmetrically distributed in pairs, which increases the grinding area; the magnetic poles N and S are arranged in correspondence to form a magnetic particle beam of a certain strength, which effectively removes burrs close to the inner wall of the hole without damaging the edge of the hole, and can also effectively grind and polish the inner surface of the hole; during the grinding process, its rotation speed forms a periodic speed difference, which increases the variability of the force direction of the abrasive, improves the movement trajectory of the abrasive, promotes the rolling and renewal of the abrasive, and improves the grinding quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the three-dimensional structure of a double-sided synchronous grinding device for orifice plates.

[0017] Figure 2It is a schematic diagram of the main structure of a double-sided synchronous grinding device for orifice plates.

[0018] Figure 3 Schematic diagram of the magnetic pole distribution of the double-sided synchronous grinding device for orifice plate parts.

[0019] Figure 4 The figure is a processing principle diagram of the double-sided synchronous grinding method for orifice plate parts.

[0020] In the figure: 1-longitudinal slide motor Ⅰ, 2-longitudinal lead screw Ⅰ, 3-longitudinal slider Ⅰ, 4-longitudinal slide Ⅰ, 5-transverse slide motor Ⅰ, 6-transverse lead screw Ⅰ, 7-transverse slider Ⅰ, 8-transverse slide Ⅰ, 9-servo motor Ⅰ, 10-coupling Ⅰ, 11-pole disk Ⅰ, 12-pole group Ⅰ, 13-pole disk support seat Ⅰ, 14-screw, 15-fastening screw, 16-longitudinal slide motor Ⅱ, 17-longitudinal 1-Longitudinal screw Ⅱ, 18-Longitudinal slider Ⅱ, 19-Longitudinal slide Ⅱ, 20-Transverse slide motor Ⅱ, 21-Transverse screw Ⅱ, 22-Transverse slider Ⅱ, 23-Transverse slide Ⅱ, 24-Servo motor Ⅱ, 25-Coupling Ⅱ, 26-Pole disk Ⅱ, 27-Pole group Ⅱ, 28-Support seat Ⅱ, 29-Workpiece, 30-Clamp, 31-Fix clamp, 33-Control cabinet, 34-Touch screen, 35-Control panel. DETAILED DESCRIPTION

[0021] The present invention is described in detail below in conjunction with the accompanying drawings, but it should be noted that the implementation of the present invention is not limited to the following embodiments.

[0022] See Figure 1 A double-sided synchronous grinding device for a hole plate part comprises a transmission unit, a magnetic grinding unit and a fixture, wherein transmission units are respectively arranged on both sides of the fixture, and the transmission units are used to drive the magnetic grinding unit to move horizontally and vertically;

[0023] The transmission unit includes a cross screw guide slide and a pole disk support frame. The cross screw guide slide drives the pole disk support frame to move horizontally and vertically. The cross screw guide slide includes a longitudinal slide motor Ⅰ1, a longitudinal screw Ⅰ2, a longitudinal slider Ⅰ3, a longitudinal slide Ⅰ4, a transverse slide Ⅰ8, a transverse slide motor Ⅰ5, a transverse screw Ⅰ6, a transverse slider Ⅰ7, a servo motor Ⅰ9, and a pole disk support seat Ⅰ13. The longitudinal slide motor Ⅰ1 drives the longitudinal screw Ⅰ2 to drive the longitudinal slider Ⅰ3 to move on the longitudinal slide Ⅰ4. The transverse slide Ⅰ8 is connected to the longitudinal slider Ⅰ3. The transverse slide motor Ⅰ5 drives the transverse screw Ⅰ6 to drive the transverse slider Ⅰ7 to move on the transverse slide Ⅰ8. The servo motor Ⅰ9 is fixed on the transverse slider Ⅰ7. The pole disk support seat Ⅰ13 is fixed to the tail of the transverse slide Ⅰ8 by screws 14 and moves synchronously with the transverse slide Ⅰ8. Similarly, the distribution of devices symmetrical to this is also the same, see Figure 1 , Figure 2 .

[0024] The magnetic particle grinding unit includes a magnetic pole disk Ⅰ11, a coupling Ⅰ10, a magnetic pole group Ⅰ12, a coupling Ⅱ25, and a magnetic pole disk Ⅱ26; the servo motor Ⅰ9 is connected to the magnetic pole disk Ⅰ11 through the coupling Ⅰ10, and the connecting rod connected to the magnetic pole disk Ⅰ11 is supported by the magnetic pole disk support seat Ⅰ13 to prevent the magnetic pole disk Ⅰ11 from vibrating too much during operation and affecting the grinding effect; the magnetic pole group Ⅰ12 is clamped on the magnetic pole disk Ⅰ11, and similarly, the servo motor Ⅱ24 is connected to the magnetic pole disk Ⅱ26 through the coupling Ⅱ25, and the magnetic pole group Ⅱ27 is clamped on the magnetic pole disk Ⅱ26. The workpiece 29 is vertically fixed by the fixture 30 and placed between the two symmetrical magnetic pole groups, and a gap is left for filling the magnetic abrasive particles. The fixture 30 is provided with a clamp 31 for fixing the workpiece 29. The magnetic pole disk I11 and the magnetic pole disk II26 are symmetrically distributed and keep the same axis, and the magnetic poles are symmetrically distributed, wherein the magnetic poles of the magnetic pole group I12 are evenly clamped on the magnetic pole disk I11 in the arrangement of N, S, N, S, and the magnetic poles of the magnetic pole group II27 are clamped on the magnetic pole disk II26 in the arrangement of N, S, N, S, and the magnetic poles N and S of the magnetic pole group I12 correspond to the magnetic poles S and N of the magnetic pole group II27, respectively. Figure 3 .

[0025] In addition, the double-sided synchronous grinding device for orifice plates also includes a control unit for controlling the longitudinal slide motor Ⅰ1, the transverse slide motor Ⅰ5, the servo motor Ⅰ9, the servo motor Ⅱ24, the longitudinal slide motor Ⅱ16, the transverse slide motor Ⅱ20, and the servo motor Ⅱ. The control unit includes a control panel 35, a control cabinet 33, a PLC controller, a limit switch, a touch screen 34, an audible and visual alarm unit, and an electrical switch, etc. The operation of the above motors is controlled by the PLC controller.

[0026] The double-sided synchronous grinding method for the orifice plate part comprises the following steps:

[0027] 1) Mix the abrasive and the grinding liquid in a volume ratio of 1:3 and stir evenly, and adsorb them on the magnetic pole. The abrasive is sintered by aluminum oxide (Al2O3) and iron powder (Fe) in a mass ratio of 1:2, the particle size is 40-120 mesh (particle size is 375-125μm), and the grinding liquid is a water-based grinding liquid;

[0028] 2) Operate the control panel 35 to automatically reset the device, and then make the cross screw guide slide drive motor act on the longitudinal slider Ⅰ3, longitudinal slider Ⅱ18 and transverse slider Ⅰ7, transverse slider Ⅱ22, so that the two magnetic pole groups Ⅰ12, Ⅱ27 move to the initial position of the processing area, keep the distance with the intermediate workpiece 29 consistent, and make the two magnetic pole disks Ⅰ11 and Ⅱ26 coaxial through fine adjustment, and then reliably position the workpiece 29;

[0029] 3) Input working parameters through the touch screen 34. For example, the speeds n1 and n2 of the servo motor Ⅰ9 and servo motor Ⅱ24 drive the symmetrical magnetic pole group Ⅰ12 and magnetic pole group Ⅱ27 to rotate in the same direction for grinding processing. During the processing, the speeds n1 and n2 are different, the speed n1 is constant, and the speed n2 is based on n1, in the form of "advancing (fast) - lagging (slow) - lagging (slow) - advancing (fast)", making periodic changes. During the change process, the magnetic poles N and S always correspond to each other. If the magnetic poles are evenly distributed radially on the magnetic pole disk, the change range does not exceed 2 of the circumference of the magnetic pole disk. 5%, that is to say, the leading (fast) or lagging (slow) is only a short-distance misalignment, and the corresponding situation of NN or SS will not occur; the longitudinal moving speed and distance, the longitudinal slide motor Ⅰ1, the longitudinal slide motor Ⅱ16 drive the two magnetic pole groups Ⅰ12, the two magnetic pole groups Ⅱ27 to perform longitudinal grinding processing at the same moving speed at the same time. After the grinding of the processing area is completed, the coordinates at this time are recorded, and then the grinding processing is performed in the opposite direction to reach the initial position; set the processing time, and reciprocate in this interval until the processing time is completed. The magnetic pole groups on the left and right sides rotate, but the speed is not synchronized. The speed of the magnetic pole group on one side is constant, and the speed of the magnetic pole group on the other side fluctuates periodically, which can accelerate the rolling and renewal of the magnetic abrasive particles, promote the replacement of the abrasive cutting edges, and thus improve the grinding efficiency. The present invention realizes automatic grinding of both sides of the orifice plate by combining the control unit with the magnetic particle grinding process, and the grinding efficiency is high.

[0030] See Figure 4 , a set of symmetrical magnetic poles in the grinding process: (a) is the initial state of processing, the rotation speeds n1 and n2 are synchronized, (a)-(b) shows that the rotation speed n2 is faster than n1, (b)-(c) shows that the rotation speed n2 is slower than n1, (c)-(d) shows that the rotation speed n2 is slower than n1, (d)-(e) shows that the rotation speed n2 is faster than n1, (e) returns to the initial state, this process is a grinding processing cycle, and the processing is repeated in this cycle during the processing.

[0031] Embodiment 1

[0032] In this embodiment, the workpiece material is GH3128, the workpiece length is 800 mm, the width is 600 mm, the thickness is 0.8 mm, the hole diameter is 4 mm, the number of transverse holes is 100, and the number of longitudinal holes is 80. It is required to remove the burrs on the hole edges and keep the surface smooth.

[0033] The processing conditions of this embodiment are: using radial magnetic poles with a diameter of 50mm and a length of 30mm, the magnetic abrasive particles are 60 mesh (particle size is 250μm), the filling amount is 20 grams, the grinding liquid is Laurion SR-9911 water-based grinding liquid, the processing gap is 1.5mm, the motor speed n1 is 1200r / min, n2 is 1100~1300r / min, and it changes periodically in this range, the longitudinal movement speed is 1.5mm / s, and the grinding processing time is 15min.

[0034] After grinding by the device and processing technology for synchronous double-sided grinding of a hole plate described in the present invention, the burrs on the hole edge are effectively removed and the inner and outer surfaces of the hole are smooth and flat, meeting the requirements of customers.

[0035] Embodiment 2

[0036] In this embodiment, the workpiece material is SUS304, the workpiece length is 600mm, the width is 600mm, the thickness is 1.0mm, the hole diameter is 3mm, the number of transverse holes is 100, and the number of longitudinal holes is 100. It is required to remove the burrs on the hole edges and keep the surface smooth.

[0037] The processing conditions of this embodiment are: using radial magnetic poles with a diameter of 50mm and a length of 30mm, the magnetic abrasive particles are 60 mesh (particle size is 250μm), the filling amount is 15 grams, the grinding liquid is Laurion SR-9911 water-based grinding liquid, the processing gap is 1.5mm, the motor speed n1 is 1000r / min, n2 is 900~1100r / min, and it changes periodically in this range, the longitudinal movement speed is 1.5mm / s, and the grinding processing time is 10min.

[0038] After grinding by the device and processing technology for synchronous double-sided grinding of a hole plate described in the present invention, the burrs on the hole edge are effectively removed and the inner and outer surfaces of the hole are smooth and flat, meeting the requirements of customers.

[0039] The device and method of the present invention are not limited to the grinding of orifice plates, but can adjust the motor speed, direction and grinding range of periodic speed difference according to different processing objects and materials. It has strong practicality and wide processing range.

Claims

1. A method for synchronously grinding double sides of a hole plate, characterized in that: The device for implementing the grinding method comprises a transmission unit, a magnetic grinding unit, and a fixture. The two sides of the fixture are respectively provided with transmission units, and the transmission units are used to drive the magnetic grinding unit to move horizontally and vertically; The transmission unit includes a cross screw guide rail slide and a magnetic pole disk support frame, and the cross screw guide rail slide drives the magnetic pole disk support frame to move horizontally and vertically; The magnetic grinding unit comprises a magnetic pole plate connected to a servo motor via a coupling, and a magnetic pole group clamped on the magnetic pole plate; The workpiece is fixed vertically by a fixture and placed between two symmetrical magnetic pole groups, with a gap left for filling with magnetic abrasive particles; The magnetic pole groups are arranged symmetrically, and the magnetic pole groups are composed of a plurality of magnetic poles, which are evenly distributed on the magnetic pole disk, and the magnetic poles are arranged in a staggered manner with N poles and S poles, and the magnetic pole groups on the relatively arranged magnetic pole disks are arranged in a one-to-one correspondence between N poles and S poles; The double-sided synchronous grinding method for the orifice plate member comprises the following steps: 1) Mix the abrasive and the grinding liquid in a volume ratio of 1:3 and stir evenly, and adsorb them on the magnetic pole; the abrasive is sintered by aluminum oxide and iron powder in a mass ratio of 1:2, the abrasive particle size is 40-120 mesh, and the grinding liquid is a water-based grinding liquid; 2) The workpiece is fixed vertically by the fixture, so that the cross screw guide slide drives the motor to drive the two magnetic pole groups to the initial position of the processing area and keep the distance with the middle workpiece consistent. Through fine adjustment, the two magnetic pole disks are made coaxial, and then the workpiece is reliably positioned; 3) During the processing, the two magnetic pole groups rotate in the same direction, but the speed n 1. n 2 different speeds n 1 Constant, speed n 2 n 1 is used as the reference, and it changes periodically in the form of "lead-lag-lag-lead". During the change, the magnetic poles N and S always correspond to each other. The cross screw guide slide drives the motor to move longitudinally, driving the two magnetic pole groups to perform longitudinal grinding at the same moving speed at the same time, and then grind in the opposite direction to reach the initial position; this reciprocating process is performed.

2. A method for synchronously grinding double sides of a hole plate according to claim 1, characterized in that: The magnetic pole disks are symmetrically distributed and keep coaxial movement during grinding.

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