Milling and installation tool for arc groove

Abstract

The present invention discloses a milling installation tool for circular arc grooves, and solves the following technical problems: The prior art mentioned in the background technology lacks an installation tool for processing circular arc grooves on the end faces of the inner cylinders of handheld pneumatic tools and pneumatic picks, and is suitable for use on milling machines. The technical solution adopted is a milling installation tool for circular arc grooves, including a base plate, a two-jaw chuck, two guide rail assemblies, two positioning platforms and two clamping devices. The two-jaw chuck is fixed on the base plate, and the two guide rail assemblies are both fixed on the base plate and symmetrically arranged about the two-jaw chuck. The two positioning platforms are respectively arranged on the two guide rail assemblies, and the two positioning platforms are respectively connected to the two claws on the two-jaw chuck. The two clamping devices are respectively arranged on the two positioning platforms for fixing the workpieces to be processed. Advantages: The milling installation tool for circular arc grooves uses a two-jaw chuck to drive two workpieces to be processed to move toward the center direction of the cylindrical milling cutter at the same time, and simultaneously processes the circular arc grooves on the end faces of the two cylinders, thereby improving work efficiency.

Description

Technical Field

[0001] The invention relates to a process equipment for mechanical processing, in particular to a tooling equipment for milling a circular arc groove located on the end surface of an inner cylinder body of a handheld pneumatic tool pneumatic pick. Background Art

[0002] Rock drilling equipment is used to break soft ores, demolish solid or cement buildings, and mine clay, etc. Rock drilling equipment is mainly pneumatic rock drilling tools. The cylinder body involved in this design is one of the main parts of the handheld pneumatic tool pneumatic pick. This part is a cylinder body part with many processing steps. The arc groove 904 on the end face of the cylinder body is the air inlet hole groove, which has position accuracy requirements relative to the pin hole 903 and the end face. When assembled, it corresponds to the horizontal hole of the air inlet hole on the handle of the handheld pneumatic tool pneumatic pick.

[0003] The processing of the arc groove 904 is carried out on a milling machine. In order to improve production efficiency, it is necessary to design a suitable tooling for milling the arc groove on the cylinder end face. Summary of the invention

[0004] The technical problem to be solved by the present invention is that the prior art mentioned in the background technology lacks a technical problem of processing the arc groove on the end face of the inner cylinder body of a handheld pneumatic tool pneumatic pick and a mounting tool suitable for use on a milling machine.

[0005] The technical solution adopted by the present invention is: a milling installation tool for arc grooves, including a base plate, a two-jaw chuck, two guide rail assemblies, two positioning platforms and two clamping devices.

[0006] The two-jaw chuck is fixed on the base plate, the two guide rail assemblies are fixed on the base plate and are symmetrically arranged about the two-jaw chuck, the two positioning platforms are respectively arranged on the two guide rail assemblies, the two positioning platforms are respectively connected to the two clamping claws on the two-jaw chuck, and the two clamping devices are respectively arranged on the two positioning platforms for fixing the workpiece to be processed;

[0007] The positioning platform includes a base plate, a front "V"-shaped block, a rear "V"-shaped block, a pin seat, a baffle and a key. The base plate is horizontally arranged, the back of the base plate is connected, the key is fixed on the back of the base plate and is located near the front end of the base plate, and the key is embedded in the keyway on the claw; the pin seat is arranged on the front of the base plate and is located at the front edge of the base plate, and a diamond pin is arranged vertically upward on the upper end face of the pin seat, and the diamond pin is inserted into the workpiece to be processed to limit the rotational freedom of the workpiece to be processed around the axis; the baffle is vertically arranged on the pin seat to limit the axial position of the workpiece to be processed; the front "V"-shaped block and the rear "V"-shaped block are both arranged on the front of the base plate, the front "V"-shaped block is located at the front end of the base plate, and the rear "V"-shaped block is located at the rear end of the base plate;

[0008] The clamping device includes a screw, a pressure plate hinge support, a pull rod hinge support, a pull rod, a pressure plate and a floating "V"-shaped pressure block. The screw and the pull rod hinge support are respectively vertically arranged on the bottom plate and are located on the extended bottom plate protruding on both side edges of the bottom plate between the front "V"-shaped block and the rear "V"-shaped block; the pressure plate hinge support is arranged on the top of the screw, the pull rod is hinged to the top of the pull rod hinge support, one end of the pressure plate is hinged to the pressure plate hinge support, and a "U"-shaped notch is opened at the other end of the pressure plate, the pull rod is inserted into the "U"-shaped notch and locked by the nut flange; the floating "V"-shaped pressure block is floatingly arranged on the pressure plate by a pin.

[0009] In the technical solution of the present invention, the tooling is placed on the milling machine workbench as a whole through the base plate, and the base plate is fixedly arranged horizontally on the milling machine workbench. The center position of the milling machine spindle is adjusted so that the center of the milling machine spindle coincides with the rotation center of the two-jaw chuck, and a cylindrical milling cutter is installed, and the workbench is adjusted so that the milling cutter reaches a suitable height so that the milling cutter can mill the arc groove on the end face of the cylinder body.

[0010] Preferably, the guide rail assembly includes a pad block, at least one guide rail and at least one slider, the pad block is vertically fixed on the base plate, the guide rail is arranged on the upper end of the pad block, the slider is slidably connected to the guide rail, and the sliding direction of the slider on the guide rail is parallel to the moving direction of the claws on the two-jaw chuck.

[0011] Preferably, one end of the guide rail arranged at the upper end of the cushion block extends into the two-jaw chuck.

[0012] Preferably, there are two guide rails, two sliders are arranged on the two guide rails, the two guide rails are parallel and spaced apart, and the claws on the two-claw chuck are located between the two guide rails.

[0013] Preferably, the two-jaw chuck comprises a chuck body, a large bevel gear, two clamping jaws, a small bevel gear and a back cover, the back cover is connected to the chuck body, and a accommodating chamber is formed between the back cover and the chuck body; two guide grooves are radially symmetrically provided on the upper edge of the chuck body, the two clamping jaws are respectively arranged in the two guide grooves and slide under the guidance of the guide grooves, and key grooves connected to the positioning platform are provided on the upper surfaces of the two clamping jaws; the large bevel gear is installed into the chuck body and is coaxial with the chuck body, a flat thread is provided on the back of the large bevel gear, and the lower surfaces of the two clamping jaws are slidably matched with the flat thread on the back of the large bevel gear; the two small bevel gears are symmetrically arranged on the side wall of the chuck body, and the two small bevel gears are meshed with the large bevel gear.

[0014] Preferably, two guide plates are symmetrically arranged on the chuck body along the radial direction, the two guide plates are alternately arranged with the two claws, and the two guide plates are slidingly matched with the planar threads on the back of the large bevel gear.

[0015] Preferably, a handwheel seat is fixed on the outer wall of the chuck body at the position of the outer end face of one of the small bevel gears, a rotating shaft is rotatably arranged on the fixed handwheel seat, a hexagonal column is arranged at one end of the rotating shaft and inserted into the hexagonal groove on the outer end face of the small bevel gear, and a handwheel is arranged at the other end of the rotating shaft.

[0016] Preferably, an arc groove is arranged inwardly along the length direction of the pressure plate on the back side of the pressure plate, and an arc protrusion is arranged outwardly on the floating "V" shaped pressure block to be inserted into the arc groove. The arc protrusion on the floating "V" shaped pressure block is inserted into the arc groove and connected by a pin.

[0017] The beneficial effects of the present invention are:

[0018] The circular arc groove milling installation tool uses a two-jaw chuck to drive two workpieces to be processed to move toward the center direction of the cylindrical milling cutter at the same time, and processes the circular arc grooves on the end faces of two cylinder bodies at the same time, thereby improving work efficiency.

[0019] By using the milling installation tool for the circular arc groove, the cylindrical milling cutter on the milling machine is subjected to equal forces acting in opposite directions at the same time, so that the force on the cutter is balanced and not easy to break, which is convenient for increasing the cutting amount and further improving the cutting efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is the general diagram of the milling installation tooling for the arc groove (the figure shows the milling cutter and two cylinder bodies to be processed).

[0021] Figure 2 It is an assembly diagram of a base plate, a two-jaw chuck and two guide rail assemblies.

[0022] Figure 3 It is a schematic diagram of a two-jaw chuck (part of the chuck body is cut away in the figure).

[0023] Figure 4 It is an assembly diagram of the positioning platform, the clamping device and the cylinder body of the workpiece to be processed.

[0024] Figure 5 yes Figure 4 The state diagram of the cylinder body with the workpiece to be processed removed.

[0025] Figure 6 It is a schematic diagram of the assembly of the positioning platform and the clamping device (the key is reflected in the figure).

[0026] Figure 7 It is a schematic diagram of the cylinder body. DETAILED DESCRIPTION

[0027] The technical solution of the present invention is described in detail below, but the protection scope of the present invention is not limited to the embodiments.

[0028] To make the content of the present invention more clearly understood, the following Figure 1-Figure 7 The specific implementation manner is further described.

[0029] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0030] like Figure 7 As shown, the cylinder is one of the main parts of the handheld pneumatic tool pneumatic pick. This part is a cylinder part, and has many processing steps. Figure 7 Among them, 901, the outer cylindrical surface of the cylinder body, 902, the end surface of the cylinder body, 903, the pin hole, 904, the arc groove.

[0031] The arc groove 904 on the cylinder end face is the air inlet groove, which has position accuracy requirements relative to the pin hole 903 and the end face, and corresponds to the air inlet transverse hole on the handle body during assembly. The main hole is processed on a milling machine. In order to improve production efficiency, it is necessary to design a suitable milling tool for the cylinder end face arc groove.

[0032] like Figure 1 As shown, in this embodiment, a milling installation tool for an arc groove includes a base plate 100, a two-jaw chuck 200, two guide rail assemblies 300, two positioning platforms 400 and two clamping devices 500. The two-jaw chuck 200 is fixed on the base plate 100, the two guide rail assemblies 300 are both fixed on the base plate 100 and are symmetrically arranged about the two-jaw chuck 200, the two positioning platforms 400 are respectively arranged on the two guide rail assemblies 300, the two positioning platforms 400 are respectively connected to the two jaws 230 on the two-jaw chuck 200, and the two clamping devices 500 are respectively arranged on the two positioning platforms 400 for fixing the workpiece to be processed.

[0033] like Figure 4 , 5As shown in Figure 6, the positioning platform 400 includes a bottom plate 401, a front "V"-shaped block 403, a rear "V"-shaped block 402, a pin seat 404, a baffle 405 and a key 407. The bottom plate 401 is horizontally arranged, and the back of the bottom plate 401 is connected to 303. The key 407 is fixed on the back of the bottom plate 401 and is located near the front end of the bottom plate 401. The key 407 is embedded in the key slot 231 on the claw 230; the pin seat 404 is arranged on the front of the bottom plate 401 and is located at the front edge of the bottom plate 401. At the edge, a diamond pin 406 is vertically arranged on the upper end face of the pin seat 404, and the diamond pin 406 is inserted into the workpiece to be processed to limit the rotational freedom of the workpiece to be processed around the axis; the baffle 405 is vertically arranged on the pin seat 404 to limit the axial position of the workpiece to be processed; the front "V"-shaped block 403 and the rear "V"-shaped block 402 are both arranged on the front side of the base plate 401, the front "V"-shaped block 403 is located at the front end position of the base plate 401, and the rear "V"-shaped block 402 is located at the rear end position of the base plate 401.

[0034] like Figure 4 As shown, the positioning platform 400 of this embodiment, the cylinder body 900 is placed on the front "V"-shaped block 403 and the rear "V"-shaped block 402 on the positioning platform 400. When placed, the outer cylindrical surface of the cylinder body is directly placed on the two V-shaped blocks, the end face of the cylinder body is in contact with the right side face of the baffle 405, and the diamond pin 406 is inserted into the pin hole 903 on the cylinder body.

[0035] In the specific implementation of the positioning platform 400 in this embodiment, the diamond pin 406 can also be changed into a cylindrical pin, and the baffle 405 provided on the upper left of the pin seat 404 can be removed to avoid axial over-positioning.

[0036] like Figure 4 and 5 As shown, the clamping device 500 includes a screw 511, a pressure plate hinge support 512, a pull rod hinge support 521, a pull rod 522, a pressure plate 531 and a floating "V"-shaped pressure block 540. The screw 511 and the pull rod hinge support 521 are respectively vertically arranged on the base plate 401 and are located on the extended base plate protruding on both side edges of the base plate 401 between the front "V"-shaped block 403 and the rear "V"-shaped block 402; the pressure plate hinge support 512 is arranged on the top of the screw 511, the pull rod 522 is hinged to the top of the pull rod hinge support 521, one end of the pressure plate 531 is hinged to the pressure plate hinge support 512, and a "U"-shaped notch is opened at the other end of the pressure plate 531, and the pull rod 522 is inserted into the "U"-shaped notch and locked by the nut flange; the floating "V"-shaped pressure block 540 is floatingly arranged on the pressure plate 531 through the pin 532.

[0037] like Figure 5As shown, the back of the pressing plate 531 is concavely provided with an arc groove along the length direction of the pressing plate 531, and the floating "V"-shaped pressing block 540 is convexly provided with an arc convex block inserted into the arc groove, and the arc convex block on the floating "V"-shaped pressing block 540 is inserted into the arc groove and connected by a pin 532. The arc convex block moves in the arc groove and is adjusted in a floating manner, so that the floating "V"-shaped pressing block 540 clamps the cylinder body 900.

[0038] like Figure 2 As shown, the guide rail assembly 300 includes a cushion block 301, at least one guide rail 302 and at least one slider 303. The cushion block 301 is vertically fixed on the base plate 100, the guide rail 302 is arranged on the upper end of the cushion block 301, and the slider 303 is slidably connected to the guide rail 302. The sliding direction of the slider 303 on the guide rail 302 is parallel to the moving direction of the clamping jaws 230 on the two-jaw chuck 200. One end of the guide rail 302 arranged on the upper end of the cushion block 301 extends into the two-jaw chuck 200.

[0039] like Figure 2 As shown, there are two guide rails 302 , and two sliders 303 are disposed on the two guide rails 302 . The two guide rails 302 are parallel and spaced apart, and the claws 230 on the two-claw chuck 200 are located between the two guide rails 302 .

[0040] like Figure 3 As shown, the two-jaw chuck 200 includes a chuck body 210, a large bevel gear 220, two clamping jaws 230, a small bevel gear 240 and a rear cover 250. The rear cover 250 is connected to the chuck body 210, and a receiving chamber is formed between the rear cover 250 and the chuck body 210; two guide grooves 211 are symmetrically provided along the radial direction of the chuck body 210, and the two clamping jaws 230 are respectively arranged in the two guide grooves 211 and slide under the guidance of the guide grooves 211. Key grooves 231 connected to the positioning platform 400 are provided on the upper surfaces of the two clamping jaws 230; the large bevel gear 220 is installed in the chuck body 210 and is coaxial with the chuck body 210; as shown in FIG. Figure 3 As shown, in this embodiment, the center hole of the large bevel gear 220 is slidably matched with the cylindrical outer surface at the center of the chuck body 210 (a bearing or a wear-resistant bushing may also be used for rotational fit).

[0041] A flat thread is provided on the back of the large bevel gear 220 , and the lower surfaces of the two claws 230 are slidably matched with the flat thread on the back of the large bevel gear 220 ; two small bevel gears 240 are symmetrically arranged on the side wall of the chuck body 210 , and both small bevel gears 240 mesh with the large bevel gear 220 .

[0042] like Figure 3As shown, the two-jaw chuck 200 of this embodiment has two guide plates 212 symmetrically arranged along the radial direction on the chuck body 210, the two guide plates 212 and the two clamping jaws 230 are arranged alternately, and the two guide plates 212 are slidably matched with the flat threads on the back of the large bevel gear 220. The arrangement of the two guide plates 212 and the two clamping jaws 230 together ensure that the chuck body 210 is level.

[0043] like Figure 3 As shown, in the two-jaw chuck 200 of this embodiment, a hand wheel seat 272 is fixed on the outer wall of the chuck body 210 at the position of the outer end surface of one of the small bevel gears 240, and a rotating shaft 271 is rotatably arranged on the fixed hand wheel seat 272. A hexagonal column inserted into the inner hexagonal groove on the outer end surface of the small bevel gear 240 is arranged at one end of the rotating shaft 271, and a hand wheel 273 is arranged at the other end of the rotating shaft 271. Shaking the hand wheel 273 can drive the small bevel gear 240 and the large bevel gear 230 to rotate, thereby driving the two jaws 230 to move synchronously inward or outward at the same time.

[0044] The application process of the tooling in this embodiment:

[0045] Place the tooling as a whole at the center of the milling machine workbench, and use a pressing plate to press the base plate 100 (using a pressing plate to press the base plate 100 is a conventional technique). Adjust the center position of the milling machine spindle so that the spindle center of the milling machine coincides with the rotation center of the two-jaw chuck 200, and install the cylindrical milling cutter 600, and adjust the milling machine workbench so that the milling cutter 600 reaches a suitable height so that the milling cutter can mill the arc groove on the end face of the cylinder body.

[0046] Loosen the nut on the tie rod 522, push the tie rod 522 outward, and open the pressure plate 531 with the floating "V"-shaped pressure block 540 to the other side. Fix the two workpieces to be processed (cylinder body 900) on the tooling; specifically: the cylinder body 900 is placed on the front "V"-shaped block 403 and the rear "V"-shaped block 402 on the positioning platform 400. When placed, the outer cylindrical surface of the cylinder body 900 is directly placed on the two V-shaped blocks, the cylinder body end face 902 contacts the right side of the baffle 405, and the diamond pin 406 is inserted into the pin hole 903 on the cylinder body. Press the pressure plate 531 down, so that the "U"-shaped notch at the end of the pressure plate 531 is inserted into the tie rod 522 and locked by the nut flange; the floating "V"-shaped pressure block 540 is pressed on the outer cylindrical surface of the cylinder body 900.

[0047] Start the machine tool spindle, turn the hand wheel 273 clockwise, drive the small bevel gear 240 and the large bevel gear 220 to rotate, and then drive the two claws 230 on the two-claw chuck 200 to drive the cylinder bodies 900 on the two positioning platforms 400 to move inward at the same time. The cylindrical milling cutter 600 mills the cylinder body end faces 902 on both sides at the same time and mills out the arc groove 904. After reaching the appropriate depth, turn the hand wheel 273 in the opposite direction to the initial position, stop the machine tool spindle, replace the cylinder body 900 workpiece, and repeat the above actions.

[0048] Anything not specifically described in the specification of the present invention is prior art or can be implemented by existing technology. It should be understood that for ordinary technicians in this field, they can be improved or transformed according to the above description, and all these improvements and transformations should fall within the scope of protection of the claims attached to the present invention.

Claims

1. A milling installation tool for circular arc grooves, characterized in that: It comprises a base plate (100), a two-jaw chuck (200), two guide rail assemblies (300), two positioning platforms (400) and two clamping devices (500), The two-jaw chuck (200) is fixed on a base plate (100), the two guide rail assemblies (300) are both fixed on the base plate (100) and are symmetrically arranged with respect to the two-jaw chuck (200), the two positioning platforms (400) are respectively arranged on the two guide rail assemblies (300), the two positioning platforms (400) are respectively connected to the two clamping claws (230) on the two-jaw chuck (200), and the two clamping devices (500) are respectively arranged on the two positioning platforms (400) for fixing the workpiece to be processed; The positioning platform (400) comprises a base plate (401), a front "V"-shaped block (403), a rear "V"-shaped block (402), a pin seat (404), a baffle (405) and a key (407). The base plate (401) is arranged horizontally, the back of the base plate (401) is connected to the slider (303), the key (407) is fixed on the back of the base plate (401) and is located near the front end of the base plate (401), and the key (407) is embedded in a keyway (231) on the claw (230); the pin seat (404) is arranged on the front of the base plate (401) and is located at the base of the base plate (401). 1), a diamond pin (406) is arranged vertically upward on the upper end surface of the pin seat (404), and the diamond pin (406) is inserted into the workpiece to be processed to limit the rotational freedom of the workpiece to be processed around the axis; a baffle (405) is arranged vertically on the pin seat (404) to limit the axial position of the workpiece to be processed; a front "V"-shaped block (403) and a rear "V"-shaped block (402) are both arranged on the front side of the bottom plate (401), the front "V"-shaped block (403) is located at the front end position of the bottom plate (401), and the rear "V"-shaped block (402) is located at the rear end position of the bottom plate (401); The clamping device (500) comprises a screw rod (511), a pressure plate hinge support (512), a pull rod hinge support (521), a pull rod (522), a pressure plate (531) and a floating "V"-shaped pressure block (540). The screw rod (511) and the pull rod hinge support (521) are respectively arranged vertically on the bottom plate (401) and are located between the front "V"-shaped block (403) and the rear "V"-shaped block (402) on the outer side edges of the bottom plate (401). The plate; a pressure plate hinge support (512) is arranged on the top of the screw rod (511); the pull rod (522) is hinged to the top of the pull rod hinge support (521); one end of the pressure plate (531) is hinged to the pressure plate hinge support (512); a "U"-shaped notch is provided at the other end of the pressure plate (531); the pull rod (522) is inserted into the "U"-shaped notch and is locked by a nut flange; a floating "V"-shaped pressure block (540) is floatingly arranged on the pressure plate (531) by a pin (532).

2. The milling installation tool for circular arc groove according to claim 1, characterized in that: The guide rail assembly (300) comprises a cushion block (301), at least one guide rail (302) and at least one slider (303); the cushion block (301) is vertically fixed on the base plate (100); the guide rail (302) is arranged on the upper end of the cushion block (301); the slider (303) is slidably connected to the guide rail (302); and the sliding direction of the slider (303) on the guide rail (302) is parallel to the moving direction of the clamping claws (230) on the two-claw chuck (200).

3. The milling installation tool for circular arc groove according to claim 2, characterized in that: One end of the guide rail (302) disposed on the upper end of the cushion block (301) extends into the two-jaw chuck (200).

4. The milling installation tool for circular arc groove according to claim 3, characterized in that: There are two guide rails (302), and two sliders (303) are arranged on the two guide rails (302). The two guide rails (302) are parallel and spaced apart, and the clamping claws (230) on the two-claw chuck (200) are located between the two guide rails (302).

5. The milling installation tool for circular arc groove according to claim 1, characterized in that: The two-jaw chuck (200) comprises a chuck body (210), a large bevel gear (220), two clamping jaws (230), a small bevel gear (240) and a rear cover (250). The rear cover (250) is connected to the chuck body (210), and a receiving cavity is formed between the rear cover (250) and the chuck body (210). Two guide grooves (211) are symmetrically provided along the radial direction on the chuck body (210). The two clamping jaws (230) are respectively arranged in the two guide grooves (211) and slide under the guidance of the guide grooves (211). The upper surfaces of the claws (230) are provided with keyways (231) connected to the positioning platform (400); the large bevel gear (220) is installed in the chuck body (210) and is coaxial with the chuck body (210); a plane thread is provided on the back of the large bevel gear (220); the lower surfaces of the two claws (230) are slidably matched with the plane thread on the back of the large bevel gear (220); and the two small bevel gears (240) are symmetrically arranged on the side wall of the chuck body (210), and the two small bevel gears (240) are meshed with the large bevel gear (220).

6. The milling installation tool for circular arc groove according to claim 5, characterized in that: Two guide plates (212) are symmetrically arranged along the radial direction on the chuck body (210), the two guide plates (212) and the two clamping claws (230) are arranged alternately, and the two guide plates (212) are slidably matched with the plane threads on the back of the large bevel gear (220).

7. The milling installation tool for circular arc groove according to claim 5, characterized in that: A hand wheel seat (272) is fixed on the outer wall of the chuck body (210) at the position where the outer end surface of one of the small bevel gears (240) is located, and a rotating shaft (271) is rotatably arranged on the fixed hand wheel seat (272). A hexagonal column inserted into the inner hexagonal groove on the outer end surface of the small bevel gear (240) is arranged at one end of the rotating shaft (271), and a hand wheel (273) is arranged at the other end of the rotating shaft (271).

8. The arc groove milling installation tool according to claim 1, characterized in that: An arc groove is concavely arranged on the back side of the pressing plate (531) along the length direction of the pressing plate (531), and an arc convex block is convexly arranged on the floating "V"-shaped pressing block (540) to be inserted into the arc groove. The arc convex block on the floating "V"-shaped pressing block (540) is inserted into the arc groove and connected via a pin (532).

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