Plane high-precision machining process equipment for carburized rocker arm type hydraulic swash plate

Abstract

The utility model discloses rocker arm type hydraulic swash plate carburized plane high-precision machining technological equipment, and relates to the technical field of high-precision machining, the rocker arm type hydraulic swash plate carburized plane high-precision machining technological equipment comprises a hot plane accurate grinding machining clamp and a grinding device, the grinding device is arranged on the front side of the hot plane accurate grinding machining clamp, and the hot plane accurate grinding machining clamp comprises a connecting plate; and a positioning seat is fixedly mounted in the middle of the front side of the connecting disc. According to the utility model, the fixed seat I is in arc surface contact with the arc self-alignment positioning block, so that the positioning tooth surface of the arc self-alignment positioning block can adapt to the characteristic that the blank surface of the end surface of the swash plate part has pattern draft, and the contact surface is increased; under the action of the second pressing screw, the inclined wedge type pressing block translates in the direction away from the fixing base, the machined swash plate part is jacked through the translation distance, and the center auxiliary pressing block presses the swash plate part under the action of the first pressing screw to prevent the swash plate from slightly moving upwards in the machining process.

Description

Technical Field

[0001] The utility model relates to the technical field of high-precision machining, in particular to a rocker-arm type hydraulic inclined plate carburized rear plane high-precision machining process equipment. Background Art

[0002] The axial piston pump is a variable swash plate axial piston pump that uses an oil distribution plate to distribute oil, the cylinder body rotates, and the flow rate is adjusted by changing the angle of the swash plate. This type of hydraulic pump adopts the optimal oil film thickness design scheme of hydraulic static balance, so that the cylinder body and the oil distribution plate, the sliding shoe and the variable swash plate are operated under pure liquid friction. It has the advantages of simple structure, small size, low noise, high efficiency, long life and self-priming ability. The axial hydraulic piston pump has a variety of variable forms to meet the requirements of users. It is widely used in machine tools, forging, metallurgy, engineering, mining, ships and other machinery and other hydraulic transmission systems;

[0003] The swash plate is one of the key parts of the swash plate axial piston pump. The flow rate is adjusted by the angle change of the swash plate, so the processing and manufacturing accuracy of the swash plate parts is particularly important, which is an important guarantee for the performance of the entire swash plate axial piston pump.

[0004] The existing technology has the following problems:

[0005] The existing manufacturing process of hydraulic swash plate parts includes: blank forging - normalizing heat treatment - rough / fine milling plane - rough and fine turning of two semicircles - rough and fine machining of rocker arm circular boss - overall carburizing heat treatment - high-precision machining of plane after heat treatment - fine grinding of two semicircles after heat treatment - fine machining of rocker arm circular boss after heat treatment and other main processes. The manufacturing accuracy of the swash plate parts after overall carburizing heat treatment is an important guarantee of the parts quality;

[0006] In the technical field of hydraulic swash plate processing and manufacturing, the widely used process is to use high-speed lathe to turn the plane of the swash plate after carburizing. This process is difficult to stably ensure the flatness of the swash plate parts ≤ 0.005 and the roughness ≤ Ra0.1 as designed in the drawings due to problems such as high-speed rotation of special fixtures and tool cutting methods. Generally, a separate plane grinding process is required. However, the rocker arm type swash plate is difficult to operate on the general plane grinding equipment due to the rocker arm structure problem. It is necessary to design a special machine for operation. Customized special grinding equipment not only increases the manufacturing cost of the swash plate parts, but also the grinding effect cannot 100% stably meet the design requirements of the drawings;

[0007] Therefore, how to solve the problem of high-precision machining of the plane of the rocker arm type hydraulic swash plate after carburizing heat treatment has become a problem that technicians in this field hope to solve. Utility Model Content

[0008] The utility model provides a rocker arm type hydraulic inclined plate carburized rear plane high-precision processing technology equipment to solve the problems raised in the above background technology.

[0009] In order to solve the above technical problems, the technical solution adopted by the utility model is:

[0010] A rocker arm type hydraulic inclined plate carburizing rear plane high-precision processing equipment, including a hot rear plane fine grinding processing fixture and a grinding device, the grinding device is arranged on the front side of the hot rear plane fine grinding processing fixture, the hot rear plane fine grinding processing fixture includes a connecting plate, a positioning seat is fixedly installed in the middle of the front side of the connecting plate, a processed inclined plate part is arranged on the front side of the positioning seat, and a central auxiliary pressure block is slidably clamped in the middle of the processed inclined plate part, a fixing seat 1 is fixedly installed on the upper front side of the connecting plate, and arc self-positioning positioning blocks are arranged on the left and right sides of the bottom front of the fixing seat 1, a fixing seat 2 is arranged at the lower front side of the connecting plate, and an inclined wedge-type pressure block is arranged at the upper front side of the fixing seat 2.

[0011] A further improvement of the technical solution of the utility model is that: the middle part of the central auxiliary pressure block is movably connected with a clamping screw 1, the rear end outer surface of the clamping screw 1 is threadedly connected to the middle part of the positioning seat, and the middle part of the oblique wedge type pressure block is slidably clamped with a clamping screw 2, and the rear end outer surface of the clamping screw 2 is threadedly connected to the middle part of the fixing seat 2.

[0012] A further improvement of the technical solution of the utility model is that the grinding device comprises a multi-channel internally cooled water-outlet grinding tool holder and a multi-channel cooled surface grinding wheel, and the multi-channel cooled surface grinding wheel is fixedly installed at the rear end of the multi-channel internally cooled water-outlet grinding tool holder.

[0013] A further improvement of the technical solution of the utility model is that the rear end of the multi-channel internal cooling water outlet type grinding tool holder is fixedly connected to a positioning bolt, and the front end of the multi-channel internal cooling water outlet type grinding tool holder is provided with a main cooling channel.

[0014] A further improvement of the technical solution of the utility model is that six cooling sub-channels are opened in a circular array on the rear side of the outer surface of the main cooling channel, and the rear end of the cooling sub-channel runs through the rear end of the multi-channel internal cooling water outlet grinding tool holder.

[0015] A further improvement of the technical solution of the utility model is that the multi-channel cooling surface grinding wheel comprises a grinding wheel main body part, the grinding wheel main body part is slidably sleeved on the outer surface of the positioning bolt, and the rear end of the grinding wheel main body part is fixedly connected with the grinding wheel sharpening part.

[0016] A further improvement of the technical solution of the utility model is that a locking nut is arranged on the inner side of the grinding wheel main body, and the inner surface of the locking nut is threadedly connected to the outer surface of the positioning bolt.

[0017] A further improvement of the technical solution of the utility model is that six cooling channels running through the main body of the grinding wheel are provided in an inner annular array, and the cooling channels are communicated with the cooling sub-channels.

[0018] Due to the adoption of the above technical solution, the utility model has achieved the following technical progress compared with the prior art:

[0019] 1. The utility model provides a rocker arm type hydraulic inclined plate carburizing rear plane high-precision processing technology equipment, through the connection plate, the positioning seat, the processed inclined plate parts, the central auxiliary pressure block, the clamping screw 1, the fixed seat 1, the arc self-positioning positioning block, the fixed seat 2, the inclined wedge pressure block, the clamping screw 2 mutual cooperation among, the fixed seat 1 and the arc self-positioning positioning block adopt arc surface contact, the advantage is that the positioning tooth surface of the arc self-positioning positioning block can adapt to the characteristics of the draft angle of the end face blank surface of the inclined plate part, increase the contact surface, the inclined wedge pressure block and the fixed seat 2 adopt inclined surface contact, under the action of the clamping screw 2, the inclined wedge pressure block is translated in the direction away from the fixed seat, and the processed inclined plate parts are tightened by the translation distance, and the central auxiliary pressure block is pressed on the inclined plate parts under the action of the clamping screw 1 to prevent the inclined plate from slightly moving upward during the processing.

[0020] 2. The utility model provides a rocker arm type hydraulic inclined disk carburizing rear plane high-precision processing equipment, through the multi-channel internal cooling water outlet type grinding tool holder, positioning bolts, cooling main channel, cooling branch channel, grinding wheel main body, grinding wheel grinding part, locking nut, cooling channel mutual cooperation, the multi-channel internal cooling water outlet type grinding tool holder is provided with cooling main channel and multi-channel cooling branch channel inside, can guide the coolant to the multi-channel cooling surface grinding wheel in multiple ways, the surface grinding wheel realizes six-way water outlet cooling, fully takes away the heat generated during surface grinding, and at the same time, six evenly distributed end face grooves are also provided on the grinding end face of the grinding wheel, the purpose is to reduce the contact surface with the parts during grinding, and make the coolant spray out in multiple ways, so that it can fully cool and lubricate the surface during the surface grinding process, thereby improving the quality of surface grinding. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a structural schematic diagram of the utility model;

[0022] Figure 2 This is a schematic diagram of the structure of the post-heating flat surface finishing grinding fixture of the utility model;

[0023] Figure 3 It is a schematic diagram of the cross-sectional structure of the post-heat flat surface finishing grinding fixture of the utility model;

[0024] Figure 4 It is a structural schematic diagram of the grinding device of the utility model;

[0025] Figure 5It is a schematic diagram of the cross-sectional structure of the grinding device of the utility model.

[0026] In the figure: 1. Post-heat plane finishing grinding fixture; 11. Connecting plate; 12. Positioning seat; 13. Processed inclined plate part; 14. Center auxiliary pressure block; 15. Clamping screw 1; 16. Fixed seat 1; 17. Arc self-positioning positioning block; 18. Fixed seat 2; 19. Oblique wedge type pressure block; 110. Clamping screw 2; 2. Grinding device; 21. Multi-channel internal cooling water outlet grinding tool holder; 211. Positioning bolt; 212. Cooling main channel; 213. Cooling branch channel; 22. Multi-channel cooling plane grinding wheel; 221. Grinding wheel main body; 222. Grinding wheel sharpening part; 223. Locking nut; 224. Cooling channel. DETAILED DESCRIPTION

[0027] In order to make the technical means, creative features, objectives and effects of the present invention easy to understand, the present invention is further described below in conjunction with specific implementation methods:

[0028] like Figure 1-3 As shown, the utility model provides a rocker arm type hydraulic inclined plate carburizing rear plane high-precision processing equipment, including a hot rear plane fine grinding processing fixture 1 and a grinding device 2, the grinding device 2 is arranged at the front side of the hot rear plane fine grinding processing fixture 1, the hot rear plane fine grinding processing fixture 1 includes a connecting plate 11, the connecting plate 11 is directly connected to the vertical machining center workbench when in use, a positioning seat 12 is fixedly installed in the middle of the front side of the connecting plate 11, a processed inclined plate part 13 is arranged on the front side of the positioning seat 12, and a central auxiliary pressing block 14 is slidably clamped in the middle of the processed inclined plate part 13, and the connecting plate 11 is connected to the workbench of the vertical machining center. A fixing seat 16 is fixedly installed on the upper front side of the receiving plate 11, and arc self-positioning blocks 17 are arranged on the left and right sides of the bottom front of the fixing seat 16. A fixing seat 2 18 is arranged on the lower front side of the connecting plate 11, and an oblique wedge-shaped pressing block 19 is arranged on the upper front side of the fixing seat 2 18. A clamping screw 15 is movably connected to the middle of the central auxiliary pressing block 14, and the rear end outer surface of the clamping screw 15 is threadedly connected to the middle of the positioning seat 12. A clamping screw 2 110 is slidably connected to the middle of the oblique wedge-shaped pressing block 19, and the rear end outer surface of the clamping screw 2 110 is threadedly connected to the middle of the fixing seat 2 18.

[0029] The fixing seat 16 and the arc self-positioning block 17 cooperate to realize axial positioning of the processed inclined plate part 13. The fixing seat 16 and the arc self-positioning block 17 adopt arc surface contact, which has the advantage that the positioning tooth surface of the arc self-positioning block 17 can adapt to the characteristics of the draft angle of the end face blank surface of the processed inclined plate part 13, thereby increasing the contact surface. The inclined wedge-type pressure block 19 and the fixing seat 2 18 adopt inclined surface contact. Under the action of the clamping screw 2 110, the inclined wedge-type pressure block 19 is translated in the direction away from the fixing seat 2 18, and the processed inclined plate part 13 is tightened by the translation distance. The central auxiliary pressure block 14 presses the processed inclined plate part 13 under the action of the clamping screw 15 to prevent the processed inclined plate part 13 from slightly moving upward during the processing.

[0030] like Figure 4-5 As shown, the utility model provides a rocker arm type hydraulic inclined disk carburizing rear plane high-precision processing equipment, the grinding device 2 includes a multi-channel internal cooling water outlet type grinding handle 21 and a multi-channel cooling surface grinding wheel 22, the multi-channel cooling surface grinding wheel 22 is fixedly installed at the rear end of the multi-channel internal cooling water outlet type grinding handle 21, the multi-channel internal cooling water outlet type grinding handle 21 is made of 40C material, and the comprehensive mechanical properties of the material are provided by the heat treatment process method of normalizing and tempering, so as to meet the requirements of the grinding handle, the multi-channel internal cooling water outlet type grinding handle 21 is installed in the BT50 machining center handle, and can be placed in the vertical machining center tool magazine for call, the rear end of the multi-channel internal cooling water outlet type grinding handle 21 is fixedly connected to the positioning bolt 211, and the front end of the multi-channel internal cooling water outlet type grinding handle 21 is provided with a cooling A main channel 212, six cooling sub-channels 213 are provided in a circular array on the rear side of the outer surface of the cooling main channel 212, the rear end of the cooling sub-channel 213 penetrates to the rear end of the multi-channel internal cooling water outlet grinding tool holder 21, the multi-channel cooling surface grinding wheel 22 includes a grinding wheel main body 221, the grinding wheel main body 221 is slidably sleeved on the outer surface of the positioning bolt 211, the rear end of the grinding wheel main body 221 is fixedly connected with a grinding wheel sharpening part 222, the grinding wheel main body 221 is made of aluminum alloy, and has the advantage of light weight, the grinding wheel sharpening part 222 uses diamond or cubic boron nitride as abrasive, and adopts a low-temperature resin binder to form the required structure, the advantages of using this diamond resin binder series are high grinding efficiency, low heat generation, good self-sharpening of the grinding wheel, and not easy to block the channel. The processed surface can meet the process requirements of the drawing design. A locking nut 223 is arranged on the inner side of the grinding wheel main body 221. The inner surface of the locking nut 223 is threadedly connected with the outer surface of the positioning bolt 211. The multi-channel cooling surface grinding wheel 22 is sleeved on the positioning bolt 211. The locking nut 223 can be used to lock and fix the multi-channel cooling surface grinding wheel 22. The inner annular array of the grinding wheel main body 221 is provided with six cooling channels 224 that penetrate front and back. The cooling channels 224 and the cooling sub-channels 213 are mutually conductive.

[0031] A main cooling channel 212 and six cooling branch channels 213 are provided inside the multi-channel internal cooling water outlet grinding tool holder 21, which can guide the coolant in multiple ways to the multi-channel cooling surface grinding wheel 22. Six cooling channels 224 in the multi-channel cooling surface grinding wheel 22 are used to realize six-way water outlet cooling, so as to fully take away the heat generated during surface grinding. At the same time, six evenly distributed end face grooves are also provided on the grinding wheel grinding part 222, so as to reduce the contact area with the parts during grinding and make the coolant spray out in multiple ways, so as to fully cool and lubricate the surface during the surface grinding process, thereby improving the quality of surface grinding.

[0032] The following is a detailed description of the working principle of the rocker arm type hydraulic inclined plate carburizing rear plane high-precision machining equipment.

[0033] like Figure 1-5 As shown, the rocker arm type hydraulic swash plate after carburizing heat treatment is placed on the post-heat plane finishing grinding fixture 1, and the processed swash plate part 13 can be pressed by the central auxiliary pressure block 14, and the processed swash plate part 13 is axially positioned by the cooperation of the fixed seat 16 and the arc self-positioning positioning block 17, and the slanted plate part 13 is pressed by the inclined wedge type pressure block 19, and then the disc milling cutter is post-heated to finish mill 0.1mm, the purpose is to eliminate the unevenness of the plane caused by the carburizing heat treatment deformation, and finally the grinding device 2 is called to grind the plane, and six cooling channels 224 in the multi-channel cooling plane grinding wheel 22 are used to realize six-way water cooling, so as to fully take away the heat generated during the plane grinding, and at the same time, six evenly distributed end face grooves are also provided in the grinding wheel blade grinding part 222, so as to enable the coolant to be sprayed out in multiple ways, and to improve the quality of the plane grinding, so as to ensure that the process requirements are met after grinding, and the grinding allowance is approximately between 0.01-0.03.

[0034] The above generally describes the present invention in detail, but it is obvious to a person skilled in the art that some modifications or improvements can be made to the present invention. Therefore, modifications or improvements that do not deviate from the spirit of the present invention are within the scope of protection of the present invention.

Claims

1. A rocker arm type hydraulic swash plate carburized rear plane high-precision machining process equipment, characterized by: The invention comprises a post-heating plane fine grinding processing fixture (1) and a grinding device (2), wherein the grinding device (2) is arranged at the front side of the post-heating plane fine grinding processing fixture (1), and the post-heating plane fine grinding processing fixture (1) comprises a connecting plate (11), a positioning seat (12) is fixedly installed in the middle of the front side of the connecting plate (11), a processed inclined plate part (13) is arranged on the front side of the positioning seat (12), and a central auxiliary pressure block (14) is slidably engaged in the middle of the processed inclined plate part (13), a fixing seat 1 (16) is fixedly installed on the upper front side of the connecting plate (11), and arc self-positioning positioning blocks (17) are arranged on the left and right sides of the bottom front of the fixing seat 1 (16), a fixing seat 2 (18) is arranged at the lower front side of the connecting plate (11), and an inclined wedge-shaped pressure block (19) is arranged at the upper front side of the fixing seat 2 (18).

2. According to claim 1, a rocker arm type hydraulic swash plate carburized plane high-precision machining process equipment, characterized in that: The middle part of the central auxiliary pressure block (14) is movably connected with a clamping screw 1 (15), and the rear end outer surface of the clamping screw 1 (15) is threadedly connected to the middle part of the positioning seat (12). The middle part of the inclined wedge-shaped pressure block (19) is slidably connected with a clamping screw 2 (110), and the rear end outer surface of the clamping screw 2 (110) is threadedly connected to the middle part of the fixing seat 2 (18).

3. The high-precision machining process equipment for the carburized surface of a rocker arm type hydraulic swash plate according to claim 1 is characterized by: The grinding device (2) comprises a multi-channel internally cooled water-discharging grinding tool holder (21) and a multi-channel cooled surface grinding wheel (22); the multi-channel cooled surface grinding wheel (22) is fixedly mounted on the rear end of the multi-channel internally cooled water-discharging grinding tool holder (21).

4. The high-precision machining process equipment for the carburized surface of a rocker arm type hydraulic swash plate according to claim 3 is characterized by: The rear end of the multi-channel internally-cooled water-outlet type grinding tool holder (21) is fixedly connected to a positioning bolt (211), and the front end of the multi-channel internally-cooled water-outlet type grinding tool holder (21) is provided with a main cooling channel (212).

5. The high-precision machining process equipment for the carburized surface of a rocker arm type hydraulic swash plate according to claim 4 is characterized in that: Six cooling sub-channels (213) are provided in a circular array on the rear side of the outer surface of the main cooling channel (212), and the rear ends of the cooling sub-channels (213) penetrate to the rear end of the multi-channel internal cooling water outlet type grinding tool holder (21).

6. The high-precision machining process equipment for the carburized surface of a rocker arm type hydraulic swash plate according to claim 5, characterized in that: The multi-channel cooling surface grinding wheel (22) comprises a grinding wheel main body (221), wherein the grinding wheel main body (221) is slidably sleeved on the outer surface of the positioning bolt (211), and the rear end of the grinding wheel main body (221) is fixedly connected to the grinding wheel sharpening part (222).

7. The high-precision machining process equipment for the carburized surface of a rocker arm type hydraulic swash plate according to claim 6, characterized in that: A locking nut (223) is provided on the inner side of the grinding wheel main body (221), and the inner surface of the locking nut (223) is threadedly connected to the outer surface of the positioning bolt (211).

8. The high-precision machining process equipment for the carburized surface of a rocker arm type hydraulic swash plate according to claim 6 is characterized by: The inner annular array of the grinding wheel main body (221) is provided with six cooling channels (224) penetrating front to back, and the cooling channels (224) are interconnected with the cooling sub-channels (213).

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