Horizontal double-cutter-bar special machine tool for milling open gear of cylinder body

Abstract

The utility model discloses a cylinder milling open gear horizontal type double-cutter-bar special machine tool which comprises a machine base, a clamp body is fixedly arranged on the machine base, a positioning clamp is arranged on the clamp body, a feeding sliding table is installed on the machine base and located on one side of the clamp body in a sliding mode, a feeding controller is arranged between the feeding sliding table and the machine base, and the feeding controller is connected with the positioning clamp. Two cutter bar seats are detachably installed at the end, close to the clamp body, of the feeding sliding table, milling cutter bars are rotationally installed on the cutter bar seats respectively, the two milling cutter bars are coaxially arranged, and at least two cutter head assemblies are installed on each milling cutter bar in an arrayed mode; transmission boxes are fixedly arranged at the far ends of the two milling cutter rods on the machine base respectively, and output shafts of the transmission boxes are connected with the milling cutter rods on the corresponding sides through flanges; and the input end of each transmission case is in power connection with a milling driving motor. According to the utility model, better machining precision and higher machining efficiency can be realized, and the disassembly, assembly and maintenance are convenient.

Description

Technical Field

[0001] This utility model relates to the field of cylinder block machining technology, and in particular to a special horizontal double-tool milling machine tool for cylinder block milling. Background Technology

[0002] The sides of the main bearing housings on the cast iron cylinder block of an engine require milling to create a gap. The positional tolerance requirements are high, generally ±0.15 to ±0.20 mm. Furthermore, this side is located inside the crankcase of the cylinder block, making machining challenging. Therefore, currently, dedicated milling machines are primarily used for this machining. There are two main structures for these dedicated milling machines. One structure mounts only two milling cutters on a tool holder. After one feed, it machines the two sides between two adjacent main bearing housings. Then, through transverse control, it machines the remaining sides between adjacent main bearing housings sequentially. While this structure offers strong milling action, high machining accuracy, and convenient tool maintenance, the machining time is generally long, significantly impacting the overall machining efficiency of the cylinder block. The other structure mounts the required number of milling cutters together on a single tool holder. After one feed, this tool holder drives all the cutters on the milling cutters to mill the corresponding sides, allowing all sides to be milled in one operation. While this structure offers high machining efficiency, the disassembly and maintenance of the tool holder and cutting tools are inconvenient. Furthermore, the tool holder is quite long, resulting in significant torque load on the power transmission structure during operation, leading to poor machining stability and accuracy. Therefore, it is necessary to comprehensively consider machining accuracy, ease of maintenance, and machining efficiency, and to improve existing milling and setting machine tools. This invention was thus developed. Utility Model Content

[0003] The technical problem to be solved by this utility model is to provide a special horizontal double-tool milling machine tool for cylinder block milling that can achieve better machining accuracy and higher machining efficiency, and is easy to disassemble and maintain.

[0004] To solve the above-mentioned technical problems, the technical solution of this utility model is: a horizontal double-tool-bar special machine tool for cylinder block milling, including a machine base, a fixture body fixedly mounted on the machine base, a positioning fixture mounted on the fixture body, a feed slide slidably mounted on one side of the fixture body on the machine base, a feed controller between the feed slide body and the machine base, two tool holders detachably mounted on the end of the feed slide body near the fixture body, a milling cutter bar rotatably mounted on each tool holder, the two milling cutter bars being coaxially arranged, and at least two cutter head assemblies arranged on each milling cutter bar; a transmission box is fixedly mounted on the machine base at the far end of each of the two milling cutter bars, the output shaft of the transmission box is flange-connected to the milling cutter bar on the corresponding side; and a milling drive motor is poweredly connected to the input end of each transmission box.

[0005] As a preferred technical solution, the tool holder is integrally provided with at least two tool holder bearing seats, and the milling cutter bar is rotatably mounted on both tool holder bearing seats.

[0006] As a preferred technical solution, the cutter head assembly is respectively installed on both sides of each cutter head bearing seat on the milling cutter bar.

[0007] As a preferred technical solution, the cutter head assembly includes a milling cutter head, on which at least two circumferentially arranged milling tools are fixedly mounted.

[0008] As a preferred technical solution, the positioning fixture includes positioning bosses fixedly mounted on the fixture body and corresponding to the cylinders above and below the main bearing seat, respectively. A clamping block is slidably mounted on the fixture body on the other side of the positioning bosses. The clamping block can press the cylinders against the positioning bosses. The clamping block is connected to a clamping controller. A positioning pin is slidably mounted on the fixture body at the positioning bosses along the direction close to or away from the cylinders. The positioning pin is connected to a positioning controller that can drive the positioning end of the positioning pin to be higher than the positioning bosses.

[0009] As a preferred technical solution, the clamping controller includes a clamping guide channel disposed on the clamping body, and a clamping guide post fixedly disposed on the clamping block and sliding within the clamping guide channel; the clamping body is provided with a clamping control channel disposed perpendicular to the clamping guide channel, and a clamping force-applying wedge is slidably installed within the clamping control channel; the clamping guide post is provided with a clamping force-applying opening for the clamping force-applying wedge to pass through; the clamping force-applying wedge is provided with a force-applying inclined surface that drives the clamping guide post to slide towards the cylinder body, and a return inclined surface that drives the clamping guide post to slide away from the cylinder body; the clamping guide post is provided with a force-applying transmission part corresponding to the force-applying inclined surface, and a return transmission part corresponding to the return inclined surface; the clamping force-applying wedge is connected to a clamping control cylinder.

[0010] As a preferred technical solution, the positioning controller includes a lever that is oscillatingly mounted on the clamping body. The lever has an actuating ball head at one end near the positioning pin, and the positioning pin has an actuating groove corresponding to the actuating ball head. A positioning control cylinder is mounted on the clamping body at the other end of the lever. A positioning control pin is mounted on the piston rod of the positioning control cylinder, and the lever has a positioning control elongated hole corresponding to the positioning control pin.

[0011] As a preferred technical solution, a conveyor seat that can slide in and out of the clamping body is slidably installed on the base, and the conveyor seat is used to place the cylinder body.

[0012] Due to the adoption of the above technical solution, a horizontal double-tool-bar milling machine tool for cylinder block milling includes a machine base, on which a fixture is fixedly mounted. The fixture is equipped with a positioning fixture. A feed slide is slidably mounted on one side of the fixture on the machine base. A feed controller is provided between the feed slide and the machine base. Two tool holders are detachably mounted on the end of the feed slide near the fixture. Each tool holder rotatably mounts a milling cutter bar. The two milling cutter bars are coaxially arranged, and at least two cutter head assemblies are arranged on each milling cutter bar. A transmission box is fixedly mounted on the machine base at the distal end of each of the two milling cutter bars. The output shaft of the transmission box is flange-connected to the corresponding milling cutter bar. A milling drive motor is poweredly connected to the input end of each transmission box. This invention allows the two milling cutter bars to share the required number of cutter head assemblies, and the feed slide can simultaneously complete all side milling operations in a single feed, resulting in high processing efficiency. The dual-bar configuration significantly reduces the length of each milling cutter bar and the torque load on each transmission box, resulting in smoother milling and better machining accuracy. Each milling cutter bar is connected to the feed slide via a separate bar holder. Due to the reduced torque load, the ends of the milling cutter bars are also flange-connected, allowing for individual disassembly and maintenance of each cutter bar by disconnecting the flange connection and the bar holder connection, making tool disassembly and maintenance more convenient. Attached Figure Description

[0013] The following figures are intended only to illustrate and explain the present invention and do not limit the scope of the present invention. Wherein:

[0014] Figure 1 This is a top view of an embodiment of the present invention.

[0015] Figure 2 yes Figure 1 An enlarged structural diagram of one of the milling cutter shanks;

[0016] Figure 3 yes Figure 1 A schematic diagram of the AA structure;

[0017] Figure 4 yes Figure 3 Enlarged structural diagram of the middle milling cutter shank;

[0018] Figure 5 yes Figure 3 A schematic diagram showing the state of the cylinder block when the clamping device is positioned and fixed.

[0019] Figure 6 yes Figure 5 A magnified schematic diagram of the positioning controller.

[0020] Figure 7 yes Figure 5 An enlarged schematic diagram of the clamping controller.

[0021] In the diagram: 1-Base; 2-Clamping body; 3-Positioning fixture; 31-Positioning boss; 32-Clamping block; 33-Clamping controller; 331-Clamping guide channel; 332-Clamping guide post; 333-Clamping control channel; 334-Clamping force wedge; 335-Force application ramp; 336-Return ramp; 337-Force application transmission unit; 338-Return transmission unit; 339-Clamping control cylinder; 34-Positioning pin; 35-Positioning controller; 351-Lever; 352-Actuating ball head; 353-Actuating groove; 354-Positioning control cylinder; 355-Positioning control pin; 356-Positioning control elongated hole; 4-Conveyor seat; 5-Feed slide; 6-Milling cutter shank; 61-Cutter shank seat; 611-Cutter shank bearing seat; 62-Cutter head assembly; 621-Milling cutter head; 622-Milling cutter; 623-Sleeve; 63-Transmission box; 64-Milling drive motor; 9-Cylinder body; 91-Main bearing seat. Detailed Implementation

[0022] The present invention will be further described below with reference to the accompanying drawings and embodiments. In the following detailed description, exemplary embodiments of the present invention are described only by way of illustration. Undoubtedly, those skilled in the art will recognize that various modifications can be made to the described embodiments without departing from the spirit and scope of the present invention. Therefore, the drawings and description are illustrative in nature and not intended to limit the scope of the claims.

[0023] like Figures 1 to 7 As shown, a horizontal double-tool-bar milling machine for cylinder block milling includes a machine base 1. A clamping body 2 is fixedly mounted on the machine base 1, and a positioning fixture 3 is mounted on the clamping body 2. The positioning fixture 3 is used to position and fix the cylinder block 9. In this embodiment, the positioning fixture 3 includes positioning bosses 31 fixedly mounted on the clamping body 2 and corresponding to the cylinder block 9 above and below the main bearing seat 91, respectively. A clamping block 32 is slidably mounted on the clamping body 2 on the other side of the positioning bosses 31. The clamping block 32 can press the cylinder block 9 onto the positioning bosses 31. The clamping block 32 is connected to a clamping controller 33. A positioning pin 34 is slidably mounted on the clamping body 2 at the positioning bosses 31 in a direction close to or away from the cylinder block 9. The positioning pin 34 is connected to a positioning controller 35 that can drive the positioning end of the positioning pin 34 to be higher than the positioning bosses 31.

[0024] The clamping controller 33 drives the clamping block 32 to press the cylinder body 9 onto the positioning boss 31 to fix the cylinder body 9. The positioning controller 35 drives the positioning pin 34 to extend above the positioning boss 31, so that the cylinder body 9 can be positioned by inserting the positioning pin 34 during the fixing process.

[0025] The clamping controller 33 of this embodiment includes a clamping guide channel 331 disposed on the clamping body 2, and a clamping guide post 332 fixedly disposed on the clamping block 32 and sliding within the clamping guide channel 331; the clamping body 2 is provided with a clamping control channel 333 disposed perpendicular to the clamping guide channel 331, and a clamping force-applying wedge 334 is slidably installed within the clamping control channel 333; the clamping guide post 332 is provided with a clamping force-applying wedge 334. 4. The clamping force application passage is passed through; the clamping force application wedge 334 is provided with a force application slope 335 that drives the clamping guide post 332 to slide toward the cylinder body 9, and a return slope 336 that drives the clamping guide post 332 to slide away from the cylinder body 9; the clamping guide post 332 is provided with a force application transmission part 337 corresponding to the force application slope 335, and a return transmission part 338 corresponding to the return slope 336; the clamping force application wedge 334 is connected to a clamping control cylinder 339.

[0026] After the clamping control cylinder 339 controls the clamping force-applying wedge 334 to slide downward, the force-applying inclined surface 335 contacts the force-applying transmission part 337 and uses the inclined surface to guide and press the force-applying transmission part 337, causing the clamping guide post 332 to slide towards the cylinder body 9, and the clamping pressure block 32 finally presses the cylinder body 9. After the clamping control cylinder 339 controls the clamping force-applying wedge 334 to slide upward, the return inclined surface 336 contacts the return transmission part 338 and uses the inclined surface to guide and press the return transmission part 338, causing the clamping guide post 332 to slide away from the cylinder body 9, and the clamping pressure block 32 releases its pressing effect on the cylinder body 9.

[0027] The positioning controller 35 includes a lever 351 oscillatingly mounted on the clamp body 2. The lever 351 has an actuating ball head 352 at one end near the positioning pin 34. The positioning pin 34 has an actuating groove 353 corresponding to the actuating ball head 352. A positioning control cylinder 354 is mounted on the clamp body 2 at the other end of the lever 351. A positioning control pin 355 is mounted on the piston rod of the positioning control cylinder 354. The lever 351 has a positioning control elongated hole 356 corresponding to the positioning control pin 355.

[0028] When the positioning control cylinder 354 drives the lever 351 to swing forward, the actuating ball head 352 causes the positioning pin 34 to protrude above the positioning boss 31, and the positioning pin 34 serves a positioning function. When the positioning control cylinder 354 drives the lever 351 to swing in the reverse direction, the actuating ball head 352 causes the positioning pin 34 to retract, preventing it from protruding above the positioning boss 31. During the positioning control process, the engagement of the actuating ball head 352 with the ball groove of the actuating groove 353, and the provision of the positioning control elongated hole 356, enable the lever 351 to perform effective swing transmission.

[0029] In this embodiment, the upper and lower positioning bosses 31 are used to position the upper and lower parts of the main bearing seat 91 of the cylinder body 9, and clamping is achieved by clamping blocks 32 on opposite sides. This simplifies the clamping force structure and avoids complex clamping force structures near the open position of the main bearing seat 91, facilitating the feed machining of the milling-related structures. The positioning pin 34 is positioned above the positioning bosses 31 through positioning control. When the cylinder body 9 does not need to be clamped, the positioning pin 34, which is lower than the positioning bosses 31, and the returning clamping blocks 32 facilitate the smooth entry and exit of the cylinder body 9 from the clamping body 2. In this embodiment, the positioning pin 34 also achieves telescopic transmission through a swing-mounted lever 351. The positioning control structure can also easily avoid the milling-related structures, further facilitating the smooth feed machining of the milling-related structures.

[0030] Preferably, a conveyor seat 4, which can enter and exit the clamping body 2, is slidably mounted on the base 1. The conveyor seat 4 is used to place the cylinder body 9. With the assistance of the conveyor seat 4, it is convenient for the cylinder body 9 to enter and exit the clamping body 2, and it is convenient for the cylinder body 9 to be milled in batches continuously and efficiently.

[0031] A feed slide 5 is slidably mounted on the base 1 on one side of the clamping body 2, and a feed controller is provided between the feed slide 5 and the base 1. The feed slide 5 serves as the carrier of the milling opening structure, and is driven by the feed controller to approach the cylinder 9, forming a milling opening feed action. The feed controller can be implemented using a hydraulic cylinder with stroke control, or it can be implemented using a motor in conjunction with transmission. This is well-known technology in the art and will not be described in detail here, nor is it shown in the figure.

[0032] Two tool holders 61 are detachably mounted on one end of the feed slide 5 near the fixture 2. A milling cutter shank 6 is rotatably mounted on each tool holder 61. The two milling cutter shanks 6 are coaxially arranged, and at least two cutter disc assemblies 62 are arranged on each milling cutter shank 6. A transmission box 63 is fixedly mounted on the base 1 at the distal end of each of the two milling cutter shanks 6. The output shaft of the transmission box 63 is flange-connected to the corresponding milling cutter shank 6. A milling drive motor 64 is poweredly connected to the input end of each transmission box 63.

[0033] In this embodiment, two milling cutter bars 6 are configured, and the required number of cutter head assemblies 62 are distributed on the two milling cutter bars 6. This embodiment illustrates that twelve cutter head assemblies 62 are required, with six mounted on each milling cutter bar 6. The feed slide 5 feeds once, and in this embodiment, all side milling operations can be completed simultaneously, resulting in high processing efficiency. The dual-cutter bar configuration significantly reduces the length of each milling cutter bar 6 and the torque load on each transmission box 63, thus ensuring smooth milling and achieving better machining accuracy. Simultaneously, the reduced length of the milling cutter bars 6 makes material selection and tolerance control easier to manage during manufacturing, simplifying the manufacturing process and reducing manufacturing costs. Each milling cutter bar 6 is connected to the feed slide 5 via a separate cutter bar seat 61. Due to the reduced torque load, the ends of the milling cutter bars 6 are also flange-connected. Therefore, each milling cutter bar 6 can be individually disassembled and maintained by disconnecting the flange connection and the cutter bar seat 61, making tool disassembly and maintenance more convenient.

[0034] In this embodiment, the tool holder 61 is integrally provided with at least two tool holder bearing seats 611, and the milling cutter 6 is rotatably mounted on both tool holder bearing seats 611 to ensure smooth rotation of the milling cutter 6. The milling cutter assemblies 62 are respectively mounted on both sides of each tool holder bearing seat 611 on the milling cutter 6. Thus, each tool holder bearing seat 611 and the two side milling assemblies 62 can enter together between two adjacent main bearing seats 91 on the cylinder body 9 to perform milling on the two sides between the two adjacent main bearing seats 91 simultaneously. This results in smooth machining, high machining accuracy, and high machining efficiency. The cutter head assembly 62 includes a milling cutter head 621, on which at least two circumferentially arranged milling cutters 622 are fixedly mounted. Each milling cutter head 621 is installed with a key to the milling cutter shank 6. Adjacent milling cutter heads 621, milling cutter heads 621 and cutter shank bearing seats 611, and milling cutter heads 621 and shank end structures are axially positioned using sleeves 623. The installation technology of the milling cutter head 621 on the milling cutter shank 6 is known in the art and will not be described in detail here.

[0035] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A horizontal double-tool milling machine tool for cylinder block milling, comprising a machine base, a fixture fixedly mounted on the machine base, a positioning fixture mounted on the fixture, a feed slide slidably mounted on the machine base on one side of the fixture, and a feed controller provided between the feed slide and the machine base, characterized in that: Two tool holders are detachably mounted on one end of the feed slide near the fixture body. Each tool holder has a milling cutter shank rotatably mounted on it. The two milling cutter shanks are coaxially arranged, and at least two cutter disc assemblies are arranged on each milling cutter shank. A transmission box is fixedly provided on the machine base at the far end of each of the two milling cutter shanks. The output shaft of the transmission box is flange-connected to the milling cutter shank on the corresponding side. A milling drive motor is poweredly connected to the input end of each transmission box.

2. The cylinder block milling horizontal double-tool-bar special machine tool as described in claim 1, characterized in that: The tool holder is integrally provided with at least two tool holder bearing seats, and the milling cutter bar is rotatably mounted on both tool holder bearing seats.

3. The cylinder block milling horizontal double-tool-bar special machine tool as described in claim 2, characterized in that: The milling cutter bar is equipped with the cutter disc assembly on both sides of each cutter bar bearing seat.

4. The cylinder block milling horizontal double-tool-bar special machine tool as described in claim 1, characterized in that: The cutter head assembly includes a milling cutter head, on which at least two circumferentially arranged milling tools are fixedly mounted.

5. The cylinder block milling horizontal double-tool-bar special machine tool as described in claim 1, characterized in that: The positioning fixture includes positioning bosses fixedly mounted on the fixture body and corresponding to the cylinders above and below the main bearing seat, respectively. A clamping block is slidably mounted on the fixture body on the other side of the positioning bosses. The clamping block can press the cylinders against the positioning bosses. The clamping block is connected to a clamping controller. A positioning pin is slidably mounted on the fixture body at the positioning bosses along the direction close to or away from the cylinders. The positioning pin is connected to a positioning controller that can drive the positioning end of the positioning pin to be higher than the positioning bosses.

6. The cylinder block milling horizontal double-tool-bar special machine tool as described in claim 5, characterized in that: The clamping controller includes a clamping guide channel disposed on the clamping body, and a clamping guide post fixedly disposed on the clamping block and sliding within the clamping guide channel; the clamping body is provided with a clamping control channel perpendicular to the clamping guide channel, and a clamping force-applying wedge is slidably installed within the clamping control channel; the clamping guide post is provided with a clamping force-applying opening for the clamping force-applying wedge to pass through; the clamping force-applying wedge is provided with a force-applying inclined surface that drives the clamping guide post to slide towards the cylinder body, and a return inclined surface that drives the clamping guide post to slide away from the cylinder body; the clamping guide post is provided with a force-applying transmission part corresponding to the force-applying inclined surface, and a return transmission part corresponding to the return inclined surface; the clamping force-applying wedge is connected to a clamping control cylinder.

7. The cylinder block milling horizontal double-tool-bar special machine tool as described in claim 5, characterized in that: The positioning controller includes a lever that is oscillatingly mounted on the clamp body. The lever has an actuating ball head at one end near the positioning pin, and the positioning pin has an actuating groove corresponding to the actuating ball head. A positioning control cylinder is mounted on the clamp body at the other end of the lever. A positioning control pin is mounted on the piston rod of the positioning control cylinder, and the lever has a positioning control elongated hole corresponding to the positioning control pin.

8. The cylinder block milling horizontal double-tool-bar special machine tool as described in claim 1, characterized in that: A conveyor seat that can move in and out of the clamping body is slidably mounted on the base, and the conveyor seat is used to place the cylinder body.

Images