KR101227005B1 - The cutting method of set plate hole manufacture for piston type fluid pressure pump - Google Patents

The cutting method of set plate hole manufacture for piston type fluid pressure pump Download PDF

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KR101227005B1
KR101227005B1 KR1020100128941A KR20100128941A KR101227005B1 KR 101227005 B1 KR101227005 B1 KR 101227005B1 KR 1020100128941 A KR1020100128941 A KR 1020100128941A KR 20100128941 A KR20100128941 A KR 20100128941A KR 101227005 B1 KR101227005 B1 KR 101227005B1
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South Korea
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tip
set plate
boring
hole
machining
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KR1020100128941A
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Korean (ko)
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KR20110004820A (en
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이종관
주수영
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이종관
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  • Mechanical Engineering (AREA)
  • Drilling And Boring (AREA)

Abstract

The present invention relates to a cutting method for machining a set plate hole of a piston-type hydraulic pump, the cutting of the set plate hole processing tool is rotated to lower the step of drilling a hole in the circular plate for the set plate processing; After the drilling is completed, the cutting tool for machining the set plate hole is further lowered to boring the hole with the boring tip; After the boring is completed, the cutting tool for the set plate hole processing is further lowered to perform a hole top chamfer with a 45 degree inclined machining surface of the top chamfering tip; Machining a chamfer when the cutting tool for machining a set plate hole rises to a 45 degree inclined surface of a boring tip while rotating and rotating; By cutting the set plate hole processing tool, the machining of one set plate hole is completed, and by repeating the above steps, all the holes into which the piston shoe of the set plate is inserted are processed.
According to the present invention, the drilling, boring, and chamfering are performed in one cutting tool when the hole of the piston shoe of the set plate is inserted, thereby improving productivity, improving the problem of missing chamfering, and significantly improving the chamfering accuracy. There is a remarkable effect of preventing damage to the hydraulic pump.

Description

CUTTING METHOD OF SET PLATE HOLE MANUFACTURE FOR PISTON TYPE FLUID PRESSURE PUMP}

The present invention relates to a cutting method for machining a set plate hole of a piston type hydraulic pump. More specifically, the present invention relates to a cutting method for hole drilling and hole corners, which are formed in a set plate, which is a component of a piston type hydraulic pump, into which a piston shoe is inserted. The present invention relates to a cutting method for a set plate hole processing that can perform a chamfering operation with one cutting tool.

In general, the hydraulic pump can be largely divided into a piston type hydraulic pump and a gear type hydraulic pump. The piston type hydraulic pump is made using the principle of syringe, and the piston installed in the long hole formed in the cylinder block generates hydraulic pressure by linear reciprocating motion. It is a pump. And the piston type hydraulic pump is used for high pressure and high capacity, and it can be used for almost all hydraulic devices because it can precisely control the pressure and discharge amount. The gear pump is a pump that generates hydraulic pressure by the power of a rotating gear. The gear pump is simple to manufacture, and is used in small capacity and low pressure pumps because of its simple structure.

The piston type hydraulic pump is composed of a housing, a head cover, a drive shaft, a cylinder block assembly, and the like. In particular, the cylinder block assembly is a hydraulic pump that generates hydraulic pressure while a piston rotating by the drive shaft acts as a syringe. Is the most important assembly in. And the cylinder block assembly 10 is provided with a cylinder block 11, a piston 12, a piston shoe 13, a set plate 14 and the like are assembled.

The cylinder block 11 is formed of a cylindrical block, and has several long holes penetrating from the upper surface to the lower surface of the block. And the piston 12 is inserted into the long hole of the cylinder block to generate a hydraulic pressure reciprocating. In addition, one end of the piston is in contact with the piston shoe 13 to push the piston, so that the piston can make a linear reciprocating motion inside the long hole of the cylinder block. And a set plate 14 is installed between the piston shoe and the piston, the set plate is such that the piston shoe 13 is set in a constant position.

The set plate 14 is formed in the shape of a disc and has a hole in which a drive shaft is inserted in the center, and several holes in which the piston shoe 13 is inserted are formed with the same size and a constant pitch around the center hole. In addition, the corners formed by the set plate surface and the holes into which the piston shoe is inserted are chamfered to prevent contact with corner portions of the piston shoe when the piston shoe is inserted into the set plate and placed therein.

    And the holes 15 into which the piston shoe of the set plate is inserted are processed while the drill processing for drilling holes in the circular plate, boring processing for widening the holes, and hole edge chamfering processing are performed in sequence. However, the conventional technology is to proceed with the chamfering work manually in a separate process after the drill processing, boring processing work, or to proceed with the chamfering work using a separate tool, productivity is lowered, manpower is wasted and the unit price is increased There is a situation. In addition, when the chamfering work is manually performed, the chamfering work is missed or the precision is poor, and the piston shoe and the set plate are frequently damaged due to contact between the corner of the piston shoe and the corner of the set plate hole.

Therefore, the present invention has been made to solve the problems as described above, and proceed to the chamfering work manually in a separate process after the drilling, boring processing operations when the hole 15 processing the piston shoe of the set plate is inserted, or separately Cutting for set plate hole machining, which improves productivity, waste of manpower and unit cost by using chamfering, and the problem of missing chamfering or inaccurate precision when chamfering is performed manually. To provide a way.

Accordingly, the present invention provides a cutting method for processing a set plate hole of a piston-type hydraulic pump, the cutting of the set plate hole processing tool is rotated to lower the drill tip to drill holes in the set plate processing circular plate; After the drilling is completed, the cutting tool for machining the set plate hole is further lowered to boring the hole with the boring tip; After the boring is completed, the cutting tool for the set plate hole processing is further lowered to perform a hole top chamfer with a 45 degree inclined machining surface of the top chamfering tip; Machining a chamfer when the cutting tool for machining a set plate hole rises to a 45 degree inclined surface of a boring tip while rotating and rotating; The machining of one set plate hole is completed through the step of restoring the cutting tool for processing the set plate hole, and repeating the above steps, all the holes into which the piston shoe of the set plate is inserted are processed.

According to the present invention, the drilling, boring, and chamfering are performed in one cutting tool when the hole of the piston shoe of the set plate is inserted, thereby improving productivity, improving the problem of missing chamfering, and significantly improving the chamfering accuracy. There is a remarkable effect of preventing damage to the hydraulic pump.

1 is a front view of a cutting tool for machining the fixed set plate hole of the present invention.
Figure 2 is a front view of the cutting tool for the variable set plate hole machining of the present invention
Figure 3 is a side view of the cutting tool for machining the variable set plate hole of the present invention
Figure 4 is a plan view of the cutting tool for the present invention variable set plate hole processing
Figure 5 is a detailed view of the cutting tool guide groove for the present invention variable set plate hole processing
Figure 6 is a plan view of a set plate of the present invention piston type hydraulic pump
Figure 7 is a side view of the set plate of the present invention piston type hydraulic pump
Figure 8 is a front view of the piston shoe inserted into the set plate of the piston type hydraulic pump
9 is a cross-sectional view of a cylinder block assembly of a piston type hydraulic pump
10 is a detailed view of the drilling of the cutting tool for the set plate hole machining
11 is a detailed view of boring of a cutting tool for machining a set plate hole;
12 is a detailed view of the top chamfering of the cutting tool for the set plate hole machining
Fig. 13 is a bottom view chamfering detail drawing of a cutting tool for machining a set plate hole;

The present invention relates to a cutting method for machining a set plate hole of a piston-type hydraulic pump, the cutting of the set plate hole processing tool is rotated to lower the step of drilling a hole in the circular plate for the set plate processing; After the drilling is completed, the cutting tool for machining the set plate hole is further lowered to boring the hole with the boring tip; After the boring is completed, the cutting tool for the set plate hole processing is further lowered to perform a hole top chamfer with a 45 degree inclined machining surface of the top chamfering tip; Machining a chamfer when the cutting tool for machining a set plate hole rises to a 45 degree inclined surface of a boring tip while rotating and rotating; The machining of one set plate hole is completed through the step of restoring the cutting tool for processing the set plate hole, and repeating the above steps, all the holes into which the piston shoe of the set plate is inserted are processed.

The present invention will be described in detail with reference to the accompanying drawings.

1 is a front view of the cutting tool for the fixed set plate hole machining of the present invention, Figure 2 is a front view of the cutting tool for machining the set plate hole machining of the present invention. 3 is a side view of the cutting tool for machining the set plate hole of the present invention, and FIG. 4 is a plan view of the cutting tool for machining the set plate hole of the present invention. 5 is a detailed view of the cutting tool guide groove for the variable set plate hole processing of the present invention, and FIG. 6 is a plan view of the set plate of the piston type hydraulic pump of the present invention. 7 is a side view of the set plate of the piston type hydraulic pump of the present invention, and FIG. 8 is a front view of the piston shoe inserted into the set plate of the piston type hydraulic pump. 9 is a cross-sectional view of a cylinder block assembly of a piston type hydraulic pump, and FIG. 10 is a detailed view of drill processing of a cutting tool for machining a set plate hole. And Fig. 11 is a detailed view of boring of a cutting tool for machining a set plate hole. 12 is a detailed view of the top chamfering of the cutting tool for set plate hole processing, Figure 13 is a detailed view of the bottom chamfering of the cutting tool for set plate hole processing.

The cutting tool 20, 30 for the set plate hole processing of the present invention is a body (21, 31), tip holders (22, 32), drill tips (23, 26), boring tips (24), top chamfering tips ( 25) is assembled and provided, and is divided into a fixed set plate hole processing cutting tool 20 and a variable set plate hole processing cutting tool 30 according to how the body and the tip holder are combined.

The stationary body 21 of the fixed set plate hole processing cutting tool 20 is formed in a cylindrical shape, the upper portion of the cylinder is formed as a portion fixed to the cutting tool fixing chuck of the machining M / C. And a long hole is formed in the center of the lower portion is provided so that the upper portion of the fixed tip holder 22 is inserted and fixed.

And the fixed tip holder 22 is a cylindrical shape, the upper part is inserted into the fixed body 21 is coupled, the lower part of the drill tips (23, 26) and boring tips (24) and the top chamfer tip (25) It is formed into a fixed structure.

In addition, a coolant inflow space 27 is formed in the fixed body 21 and the fixed tip holder 22, and the coolant inflow space of the fixed body and the coolant inflow space of the fixed tip holder communicate with each other. And the coolant inlet 28 is formed on the top of the stationary body, the coolant outlet 29 is formed on the top of the upper chamfering tip formed on the fixed tip holder. Therefore, the cutting oil introduced into the cutting oil inlet of the upper end of the stationary body is discharged into the cutting oil outlet formed in the fixed tip holder, so that the processing tips discharge the cutting oil around the processing tip when processing the holes into which the piston shoe is inserted.

    The upper portion of the variable body 31 of the variable set plate hole cutting tool 30 is formed in a cylindrical shape to be fixed to the tool fixing chuck of the machining M / C, the lower portion is formed in a semi-cylindrical shape. In addition, a plurality of guide grooves 33 are horizontally formed on the square surface of the lower half-cylinder side.

And the upper part of the variable tip holder 32 is coupled to the lower part of the variable body 31 in a semi-cylindrical shape, and the lower part is fixed in a cylindrical shape to the drill tips 23 and 26 and the boring tip 24 and the upper chamfer. Dragon tip 25 is formed in a fixed structure. In addition, a plurality of guide grooves 33 are horizontally formed on the square surface of the semi-cylindrical side of the upper part of the tip holder to correspond with the lower part of the variable body, and the variable body and the tip holder are coupled while the guide grooves 33 are fitted to correspond to each other. . And the variable body and the tip holder coupled to the guide groove is completely fixed by the fixing bolt 34 penetrates horizontally.

    Therefore, the variable tip holder 32 is formed in a structure that can be fixed after moving horizontally along the guide groove 33, it is possible to process a variety of holes of different sizes, and also guide grooves corresponding to each other As it is coupled, the variable body and the tip holder coupling surface are increased to form a structure that can reduce vibration during hole processing.

The processing tips fixed to the fixing tip holder 22 and the variable tip holder 32 are formed by being divided into a drill tip, a boring tip, and a top chamfering tip. The drill tips 23 and 26 protrude from the bottom of the tip holder, and are divided into an outer drill tip 23 and an inner drill tip 26.

And the boring tip 24 is installed on the top of the drill tip, the boring tip edge is formed to protrude more than the tip holder side. And the processing surface 35 of the boring tip inclined upward in the protruding boring tip edge is installed to be inclined 45 degrees. Therefore, the protruding boring tip edge portion performs boring, and the machining surface 35 of the boring tip inclined at 45 degrees performs the lower surface chamfer 17.

In addition, the top chamfering tip 25 is installed above the boring tip, the top chamfering tip edge is formed to protrude from the tip holder side. And the processing surface 36 of the top chamfering tip inclined downward from the protruding top chamfering tip edge is installed to be inclined 45 degrees to perform the top chamfer 16. In addition, the method of fixing the processing tip to the tip holder is possible by machining a position where the processing tips can be placed on the side of the tip holder, and then placing the tip and bolting it. Machining tips can be purchased by using a commercially available cutting tip.

The following describes the procedure for processing the holes into which the piston shoe is inserted into the cutting tool for processing a set plate hole.

Fixing the set plate hole cutting tool to the machining M / C, fixing the set plate machining circular plate to the machining M / C base, inputting the hole size and chamfering degree in the control box, and then operating the machining M / C. Step, the cutting tool for processing the set plate hole is lowered while rotating, and the drill tip drills the hole on the round plate for the set plate processing.After the drilling is completed, the cutting tool for the set plate hole processing is further lowered to boring the hole with the boring tip. After the boring is completed, the cutting tool for the set plate hole processing is further lowered to perform the hole chamfering with the 45 degree inclined machining surface of the tip for chamfering, and the rotating and idle after the cutting tool for the set plate hole processing is raised. While the 45-degree inclined surface of the boring tip is used to process the chamfer, set plate hole Common cutting tool is a single processing set plate hole through the step of restitution is completed. And while repeating the above steps to process the holes into which the piston shoe of the set plate is inserted.

Therefore, the holes into which the piston shoe of the set plate machined by the cutting tool for processing the set plate hole is inserted can improve the chamfering accuracy, and the chamfer does not occur, thereby improving the problem of contact between the piston shoe and the set plate hole edge. have.

    In addition, the variable set plate hole cutting tool, which can process various types of holes while adjusting the cutting radius by flowing the body and the tip holder, can improve productivity by processing various kinds of set plates having different hole sizes.

10: cylinder block assembly 11: cylinder block
12: piston 13: piston shoe
14: set plate 15: set plate hole
16: Top Chamfer 17: Bottom Chamfer
20: Cutting tool for fixed set plate hole machining
21: fixed body 22: fixed tip holder
23: Tip for external drill 24: Tip for boring
25: Tip for top chamfer 26: Tip for internal drill
27: coolant inlet space 28: coolant inlet
29: coolant outlet
30: Cutting tool for variable set plate hole machining
31: variable body 32: variable tip holder
33: guide groove 34: fixing bolt
35: Machined surface of the boring tip inclined upward
36: Machined surface of the tip for chamfering inclined downward

Claims (1)

In the cutting method for the set plate hole processing of the piston-type hydraulic pump, the cutting step for the set plate hole processing is rotating while the drill tip (23, 26) to drill holes in the set plate processing circular plate; After the drilling is completed, the cutting tool for the set plate hole processing is further lowered to boring the hole with the boring tip 24; After the boring is completed, the cutting tool for the set plate hole processing is further lowered to perform a hole top surface chamfering to the 45 degree inclined processing surface of the top surface chamfering tip 25; Machining a chamfer when the cutting tool for machining a set plate hole is raised to a 45 degree inclined surface of the boring tip 24 while rotating and revolving; One set plate hole machining is completed by the step of restoring the set plate hole cutting tool.
Repeating the steps of machining the hole in the circular plate for processing the set plate, boring the hole, performing the chamfering of the upper surface, processing the chamfering the lower surface, and recovering the original cutting tool for the hole machining, the set plate Process all the holes into which the piston shoe is inserted,
The drill tips 23 and 26 protrude from the bottom of the tip holder, and are divided into an outer drill tip 23 and an inner drill tip 26, and the boring tip 24 is drilled. Installed on top of the tip, the boring tip 24 is formed so that the corner of the tip holder protrudes than the tip holder side, the machining surface 35 of the boring tip inclined upwardly from the corner of the protruding boring tip 24 is 45 degrees Since it is installed to be inclined, the protruding boring tip 24 corner portion performs boring, and the machining surface 35 of the 45-degree inclined boring tip performs the lower surface chamfer 17, and also for the upper surface chamfering. Tip 25 is installed on the top of the boring tip 24, the edge of the top chamfer tip 25 is formed to protrude more than the side of the tip holder, inclined downward from the edge of the protruding top chamfer tip 25 Machining surface 36 of the top chamfering tip is installed to be inclined 45 degrees to perform the top chamfer 16 Processing the set plate hole of the piston-type hydraulic pump cutting method, characterized by
KR1020100128941A 2010-12-16 2010-12-16 The cutting method of set plate hole manufacture for piston type fluid pressure pump KR101227005B1 (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101957268B1 (en) 2018-09-20 2019-03-12 김동범 Apparatus and method for machining bearing assemblies of a piston pump housing
KR20230151166A (en) * 2022-04-25 2023-11-01 (주)성림엔지니어링 Apparatus for Machining Chain Link for Infinite

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114559567B (en) * 2021-12-24 2023-11-14 浙江富乐德石英科技有限公司 Processing method of large-size quartz ring product

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0164317U (en) * 1987-10-15 1989-04-25
JPH0428955U (en) * 1990-06-28 1992-03-09
JPH06198511A (en) * 1992-05-23 1994-07-19 Heinrich Heule Burr remover with cutting tool
JPH11320229A (en) 1998-05-19 1999-11-24 Mitsubishi Materials Corp Boring tool and boring work method

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0164317U (en) * 1987-10-15 1989-04-25
JPH0428955U (en) * 1990-06-28 1992-03-09
JPH06198511A (en) * 1992-05-23 1994-07-19 Heinrich Heule Burr remover with cutting tool
JPH11320229A (en) 1998-05-19 1999-11-24 Mitsubishi Materials Corp Boring tool and boring work method

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101957268B1 (en) 2018-09-20 2019-03-12 김동범 Apparatus and method for machining bearing assemblies of a piston pump housing
KR20230151166A (en) * 2022-04-25 2023-11-01 (주)성림엔지니어링 Apparatus for Machining Chain Link for Infinite
KR102629143B1 (en) * 2022-04-25 2024-01-25 (주)성림엔지니어링 Apparatus for Machining Chain Link for Infinite

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