Numerically controlled lathe jig for internally supporting thin-wall product

Abstract

The utility model provides a numerical control lathe jig for internally supporting a thin-wall product. The numerical control lathe jig comprises a step spring collet, a limiting cover, a protective shell, a base, an operation input connecting piece, a pull block and an expansion core. Wherein the base, the expansion core, the protective shell and the limiting cover are connected in sequence, and the pull block and the step spring barrel are arranged outside the expansion core in a clamping and sleeving mode, located in the protective shell and connected into a synchronous movement assembly through a connecting piece; the step spring collet chuck is a collet chuck capable of being elastically retracted and released in the radial direction, the outer side face of the step spring collet chuck is provided with a step shape used for being detachably connected with the connecting piece, the step spring collet chuck is provided with a taper inner hole matched with the expansion core, the periphery of the front end of the step spring collet chuck is a circle of step spring collet chuck inner supporting face, and the spring collet chuck inner supporting face extends out of the limiting cover. And the operation input connecting piece extends into the base from the rear end and is connected with the pull block. According to the utility model, the input connecting piece is backwards pulled, the step spring collet clamp internally supports the inner hole of the product, and the product is limited, propped and attached to the limiting cover, so that the positioning and clamping of the product are realized, the internal supporting effect is good, the positioning precision is high, the operation is simple, and the processing efficiency is improved.

Description

Technical Field

[0001] This utility model relates to the technical field of CNC lathe fixtures, specifically a CNC lathe fixture for a thin-walled product with internal support. Background Technology

[0002] CNC lathe internal support fixtures, as an indispensable tool in CNC lathe machining, are devices specifically designed for fixing, supporting, positioning, and guiding products during CNC lathe machining. Currently, most existing internal support fixtures are mainly used for internal support of thin-walled products. However, during turning, a large support force can easily cause product deformation, while a small support force can easily cause product misalignment. At the same time, the positioning accuracy of the product requires dial indicator calibration, which cannot achieve batch processing, is time-consuming and labor-intensive, cumbersome to operate, and has low efficiency. Utility Model Content

[0003] The purpose of this utility model is to provide a CNC lathe fixture specifically for internally supported thin-walled products, which offers reliable positioning, ensures the thin-walled product does not deform, is easy to operate, and improves processing efficiency. To achieve the above objective, this utility model provides the following technical solution:

[0004] A CNC lathe fixture for an internally supported thin-walled product is characterized by comprising a stepped spring collet, a limiting cover, a protective shell, a base, an operation input connector, a pull block, and an expansion core; wherein the base, expansion core, protective shell, and limiting cover are connected in sequence, and the pull block and stepped spring collet are sleeved outside the expansion core and located inside the protective shell and connected by the connector to form a synchronous motion assembly.

[0005] The stepped spring collet is a collet that can be radially elastically extended and retracted. The outer side of the stepped spring collet is provided with a stepped shape for detachable connection with the connecting piece. The stepped spring collet has a tapered inner hole that mates with the expansion core. The outer periphery of the front end of the stepped spring collet is a stepped spring collet inner support surface. The inner support surface of the spring collet extends out of the limiting cover. The operation input connector extends into the base from the rear end and connects with the pull block.

[0006] Based on the above technical solutions, the present invention may also adopt the following further technical solutions, or combine these further technical solutions:

[0007] The stepped spring collet has multiple slits cut from the front end to the rear end and from the rear end to the front end of its collet wall. The slits from the front end to the rear end and from the rear end to the front end are spaced apart circumferentially and overlap axially.

[0008] The limiting cover is provided with a limiting hole, and the front end of the stepped spring collet passes through the limiting hole, limiting the maximum diameter of the inner support surface of the stepped spring collet through the inner wall surface of the limiting hole.

[0009] The rear part of the rising core is provided with a limiting block for limiting the retreat stroke of the pull block, the front part of the limiting block is provided with a center stepped shaft, the pull block is provided with a center stepped hole, the center stepped hole and the center stepped shaft are in sliding guide cooperation, the front end of the center stepped shaft is provided with a tapered shaft for the center line, and the tapered inner hole of the stepped spring cylinder clamp is matched with the tapered shaft.

[0010] The limiting block on the rising core is connected with the base and the protective shell.

[0011] The limiting block is located at the rear end of the protective shell and has a diameter matched with the diameter of the rear end of the protective shell, so as to serve as the rear end cover of the protective shell; the operation input connecting piece is provided with connecting keys arranged in a ring shape and uniformly spaced around the center of the base, the limiting block is provided with corresponding positioning through holes for the connecting keys to be inserted, and the front end of the connecting key is provided with a first threaded hole for being connected with the pull block through a screw.

[0012] The rear end of the operation input connecting piece is provided with a second threaded hole for being threadedly connected with a pull rod of a machine tool.

[0013] The rear of the limiting block is provided with a matching inner hole, and the circumferential outer side surface of the connecting key is matched with the matching inner hole, so as to play a role of positioning, guiding and stabilizing movement.

[0014] The pull block and the stepped spring cylinder clamp are detachably connected through the connecting piece; the connecting piece is a semicircular connecting block, including a first semicircular connecting block and a second semicircular connecting block, the semicircular connecting block adopts a folding clamping mode to detachably connect the pull block and the stepped spring cylinder clamp; the first semicircular connecting block and the second semicircular connecting block are the same in structure, the inner wall of the protective shell is matched with the outer side surfaces of the first semicircular connecting block and the second semicircular connecting block, so as to lock the first semicircular connecting block and the second semicircular connecting block, after the protective shell is removed, the first semicircular connecting block and the second semicircular connecting block are directly unlocked, the first semicircular connecting block and the second semicircular connecting block are removed, and the stepped spring cylinder clamp is disassembled and replaced.

[0015] The front end of the pull block and the rear end of the stepped spring cylinder clamp are in a circular ring shape and have the same outer diameter; the pull block and the stepped spring cylinder clamp are provided with a structure for being detachably connected with the connecting piece, which includes a clamping groove close to the front end of the pull block and a limiting stepped surface close to the rear end of the stepped spring cylinder clamp; the first semicircular connecting block and the second semicircular connecting block have a fixing groove, and the front and rear sides are respectively provided with a second positioning step and a first positioning step; the fixing groove is matched with the front end of the pull block and the rear end of the stepped spring cylinder clamp, the first positioning step is matched with the clamping groove of the pull block, and the second positioning step is matched with the limiting stepped surface.

[0016] Compared with the prior art, the utility model has the beneficial effects that:

[0017] 1. The utility model discloses a thin-walled product positioning device, which comprises a supporting shell, a limiting cover, a step spring cylinder clamp, a pull block and a product.

[0018] 2. The utility model discloses a thin-walled product positioning device, which comprises a supporting shell, a limiting cover, a step spring cylinder clamp, a pull block and a product. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 It is the whole schematic diagram of the utility model.

[0020] Figure 2 It is the whole structure section structure schematic diagram of the utility model.

[0021] Figure 3 It is the whole split schematic diagram of the utility model.

[0022] Figure 4 It is the structure section schematic diagram of the utility model when supporting the product, wherein, the protection shell and the limiting cover are hidden.

[0023] Figure 5 It is the section schematic diagram of the step spring cylinder clamp of the utility model.

[0024] Figure 6 It is the section schematic diagram of the pull block of the utility model.

[0025] Figure 7 It is the section schematic diagram of the utility model of the core. DETAILED DESCRIPTION

[0026] The technical scheme in the embodiments of the utility model will be described clearly and completely in combination with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by the person skilled in the art without creative labor belong to the protection scope of the utility model.

[0027] Please refer to Figures 1-7As shown, the utility model provides a kind of numerical control lathe fixture of inner supporting thin-walled product, including step spring cylinder chuck 1, limit cap 2, protective shell 3, base 4, operation input connecting piece 5, pull block 7, expansion core 8. Among them, base 4, expansion core 8, protective shell 3, limit cap 2 are sequentially connected, the pull block 7 and step spring cylinder chuck 1 are sleeved in expansion core 8 outside and located in the protective shell 3 and are connected as synchronous motion component by connecting piece, step spring cylinder chuck 1 is the cylinder chuck that can be radially elastically retracted, its front end protrudes limit cap 2, and is limited by limit cap 2, operation input connecting piece 5 is connected with pull block 7, base 4 is connected with machine tool (in the embodiment, the annular uniform interval of base 4 is set with base center as center base countersunk hole 42, base countersunk hole 42 is connected with machine tool threaded hole by screw, realizes the connection of the utility model fixture and machine tool), operation input connecting piece 5 is connected with pull rod on machine tool.

[0028] The step spring cylinder chuck 1 is provided with a tapered hole 12, and the outer periphery of the front end of the step spring cylinder chuck 1 is a step spring cylinder chuck inner supporting surface 11, which is used to tighten the product 9. The tapered hole 12 is an axial through hole, and the center line thereof is collinear with the center line of the base 4. The front end of the cylinder wall of the step spring cylinder chuck 1 is cut with a plurality of slits 15 from the front end to the rear end and from the rear end to the front end. The slits from the front end to the rear end and the slits from the rear end to the front end are arranged in a circumferential direction and overlap in an axial direction. The step spring cylinder chuck 1 can be radially elastically retracted, so that the inner supporting surface 11 and the product inner hole 91 are adaptively and closely fitted, and the supporting force is uniformly distributed to prevent the product 9 from deforming.

[0029] The limit cap 2 is provided with a limiting hole 23, and the front end of the step spring cylinder chuck 1 passes out of the limiting hole 23. The inner wall surface 21 of the limiting hole 23 limits the maximum diameter of the step spring cylinder chuck inner supporting surface 11. The protective shell 3 is provided with a threaded hole 32. The limit cap 2 is provided with a limit cap countersunk connecting hole 22, and the limit cap 2 is fixed on the protective shell 3 by a countersunk screw.

[0030] The rear part of the expansion core 8 is provided with a limiting block 88 for limiting the rear travel of the pull block 7. The rear of the limiting block 88 is provided with a matching inner hole 87, and the front part of the limiting block 88 is provided with a center step shaft. The center step shaft sequentially includes a first matching shaft 85 and a second matching shaft 84 with diameters decreasing in sequence. A tapered shaft 86 is arranged at the front end of the center step shaft, and the tapered shaft 86 is collinear with the center step shaft and the base 4.

[0031] The surface of the limiting block 88 is uniformly and circularly spaced with the center of the core 8 as the center, and the core connecting hole 81 is connected with the base screw hole 41 through a screw, so that the connection between the base 4 and the core 8 is realized. The limiting block 88 is uniformly and circularly spaced with the center of the core 8 as the center, and the core threaded hole 83 is connected with the protective shell connecting hole 31 through a screw, so that the connection between the core 8 and the protective shell 3 is realized. The limiting block 88 can be located at the rear end of the protective shell 3, and the diameter thereof matches the diameter of the rear end of the protective shell 3, so that it can be used as a rear end cover of the protective shell 3 to protect the internal device and prevent impurities from entering the interior to affect the realization of the normal function of the jig.

[0032] The operation input connecting piece 5 is provided with three equal division connecting keys 52 which are uniformly and circularly spaced with the center of the base as the center, and the limiting block 88 is provided with corresponding three equal division positioning through holes 82 for the insertion of the three equal division connecting keys 52, and the front end of the three equal division connecting keys 52 is provided with a threaded hole 51. The rear end of the operation input connecting piece 5 is provided with a threaded hole 53 which is threadedly connected with a draw bar of a machine tool, and the draw bar moves along the axial direction, so that the tightening or loosening of the product 9 can be controlled through the operation input connecting piece 5. The circumferential outer side surface of the three equal division connecting keys 52 cooperates with the matching inner hole 87 of the core 8 to play a role of positioning, guiding and stabilizing movement.

[0033] The draw block 7 has a center stepped through hole which includes a first matching hole 77 and a second matching hole 76 with diameters decreasing in sequence, and the first matching hole 77 and the second matching hole 76 are matched with the first matching shaft 85 and the second matching shaft 84 of the core 8 respectively, and the tapered shaft 86 is matched with the tapered inner hole 12 of the stepped spring cylinder clamp 1. When the product 9 is clamped, the inner hole 91 of the product 9 is sleeved outside the stepped spring cylinder clamp inner supporting surface 11, the rear end is tightly pressed against the front end of the limiting cover limiting hole 23, the stepped spring cylinder clamp inner supporting surface 11 is gap matched with the limiting cover limiting hole 23, the operation input connecting piece 5 is pulled back through the draw bar of the machine tool, the stepped spring cylinder clamp inner supporting surface 11 is expanded, and the inner diameter 91 of the product is tightly pressed.

[0034] The draw block 7 is provided with draw block quick connecting threaded holes 71 which are uniformly and circularly spaced with the center as the center, and the connecting nut threaded hole 51 is threadedly matched, so that the connection between the draw block 7 and the operation input connecting piece 5 is realized.

[0035] The pull block 7 and the stepped spring cylinder clamp 1 can be detachably connected through a connecting piece. The connecting piece can be a semicircular connecting block 6, which includes a first semicircular connecting block 61 and a second semicircular connecting block 62. The semicircular connecting block 6 is used to detachably connect the pull block 7 and the stepped spring cylinder clamp 1 in a clamping manner. The first semicircular connecting block 61 and the second semicircular connecting block 62 are the same in structure. The inner wall of the protective shell 3 cooperates with the outer side surface of the first semicircular connecting block 61 and the second semicircular connecting block 62 to lock the first semicircular connecting block 61 and the second semicircular connecting block 62. After the protective shell 3 is removed, the first semicircular connecting block 61 and the second semicircular connecting block 62 can be directly unlocked, and the first semicircular connecting block 61 and the second semicircular connecting block 62 can be removed. The stepped spring cylinder clamp 1 can be replaced.

[0036] The front end surface 72 of the pull block 7 is attached to the rear end surface 13 of the stepped spring cylinder clamp 1. The pull block front end 75 and the rear end 14 of the stepped spring cylinder clamp are annular, and the outer diameters 86 thereof are the same, so that the pull block front end 75 and the rear end 14 of the stepped spring cylinder clamp can be detachably connected in a simple structure, and the detachable connection is simple and convenient. The pull block 7 and the stepped spring cylinder clamp 1 are provided with a structure for detachable connection with the connecting piece, which includes a clamping groove 74 near the front end of the pull block 7 and a limiting step surface 16 near the rear end of the stepped spring cylinder clamp 1.

[0037] The first semicircular connecting block 61 and the second semicircular connecting block 62 have a fixing groove 612, and the front and rear sides are respectively provided with a second positioning step 613 and a first positioning step 611. The fixing groove 612 cooperates with the pull block front end 75 and the rear end 14 of the stepped spring cylinder clamp, the first positioning step 611 cooperates with the pull block clamping groove 74, and the second positioning step 613 cooperates with the limiting step surface 16.

[0038] The stepped spring cylinder clamp 1 and the limiting cover 2 can be replaced with different models and specifications, so that products of different sizes can be processed. Moreover, the structure of the utility model makes the replacement simple, convenient to operate, and efficient.

[0039] In summary, the numerical control lathe jig for supporting a thin-walled product according to the utility model can clamp the thin-walled product through the stepped spring cylinder clamp, can ensure that the thin-walled product is not deformed, is convenient to operate, and improves the processing efficiency and quality of the thin-walled product.

[0040] The basic principle, main features and advantages of the utility model are shown and described above. Those skilled in the art should understand that the utility model is not limited to the above-mentioned embodiments, and the above-mentioned embodiments and descriptions in the specification are only preferred examples of the utility model and are not intended to limit the utility model. Without departing from the spirit and scope of the utility model, the utility model can have various changes and improvements, and these changes and improvements all fall within the scope of the utility model claimed, and the scope of protection of the utility model is defined by the appended claims and their equivalents.

Claims

1. A numerical control lathe jig for internally supporting a thin-walled product, characterized by comprising: The device comprises a stepped spring cylinder clamp, a limiting cover, a protective shell, a base, an operation input connecting piece, a pulling block and a swelling core. The base, the swelling core, the protective shell and the limiting cover are connected in sequence. The pulling block and the stepped spring cylinder clamp are sleeved outside the swelling core and located in the protective shell and connected by the connecting piece to form a synchronous movement assembly. The stepped spring cylinder clamp is a cylinder clamp capable of radial elastic contraction and expansion. The outer side of the stepped spring cylinder clamp is provided with a stepped shape for detachable connection with the connecting piece. The stepped spring cylinder clamp is provided with a tapered inner hole matched with the swelling core. The outer periphery of the front end of the stepped spring cylinder clamp is a circle of stepped spring cylinder clamp inner supporting surface. The spring cylinder clamp inner supporting surface extends out of the limiting cover. The operation input connecting piece extends into the base from the rear end and is connected with the pulling block.

2. A numerical control lathe fixture for internally supporting a thin-walled product as claimed in claim 1, characterized in that, The front end of the cylinder wall of the stepped spring cylinder clamp is cut with a plurality of slits towards the rear end and the rear end is cut with a plurality of slits towards the front end. The slits from the front end to the rear end and the slits from the rear end to the front end are arranged in a circumferential direction and overlap in an axial direction.

3. The numerical control lathe fixture for internally bracing thin-walled products according to claim 1, characterized in that, The limiting cover is provided with a limiting hole. The front end of the stepped spring cylinder clamp passes out of the limiting hole. The inner wall surface of the limiting hole limits the maximum diameter of the stepped spring cylinder clamp inner supporting surface.

4. The numerical control lathe fixture for internally bracing thin-walled products according to claim 1, characterized in that, The rear part of the swelling core is provided with a limiting block for limiting the rear stroke of the pulling block. The front part of the limiting block is provided with a central stepped shaft. The pulling block is provided with a central stepped hole. The central stepped hole and the central stepped shaft are slidingly guided and matched. The front end of the central stepped shaft is provided with a tapered shaft for a center line. The tapered inner hole of the stepped spring cylinder clamp is matched with the tapered shaft.

5. The numerically controlled lathe fixture for internally bracing thin-walled products according to claim 1, characterized in that, The limiting block on the swelling core is connected with the base and the protective shell.

6. A numerically controlled lathe fixture for internally bracing thin-walled products as claimed in claim 5, characterized in that, The limiting block is located at the rear end of the protective shell and has a diameter matched with the diameter of the rear end of the protective shell, serving as a rear end cover of the protective shell. The operation input connecting piece is provided with connecting keys arranged in a circular shape and evenly spaced around the center of the base. The limiting block is provided with corresponding positioning through holes for the insertion of the connecting keys. The front end of the connecting keys is provided with a first threaded hole for connection with the pulling block through a screw.

7. A numerical control lathe fixture for internally bracing thin-walled products as claimed in claim 1, characterized in that, The rear end of the operation input connecting piece is provided with a second threaded hole for threaded connection with a pull rod of a machine tool.

8. A numerical control lathe fixture for internally supporting thin-walled products as claimed in claim 5, characterized in that, The back of the limiting block is provided with a matching inner hole. The circumferential outer side surface of the connecting key is matched with the matching inner hole, playing a role of positioning, guiding and stabilizing movement.

9. The numerically controlled lathe fixture for internally bracing thin-walled products according to claim 1, characterized in that, The pulling block and the stepped spring cylinder clamp are detachably connected through the connecting piece. The connecting piece is a semicircular connecting block, including a first semicircular connecting block and a second semicircular connecting block. The semicircular connecting block adopts a folding clamping manner to detachably connect the pulling block and the stepped spring cylinder clamp. The first semicircular connecting block and the second semicircular connecting block are structurally identical. The inner wall of the protective shell is matched with the outer side surface of the first semicircular connecting block and the second semicircular connecting block to lock the first semicircular connecting block and the second semicircular connecting block. After the protective shell is removed, the first semicircular connecting block and the second semicircular connecting block are directly unlocked and removed, and the stepped spring cylinder clamp is replaced.

10. A numerically controlled lathe fixture for internally bracing thin-walled products as claimed in claim 9, characterized in that, The front end of the pull block and the rear end of the stepped spring cylinder clamp are annular, and the outer diameters of the two are the same; the pull block and the stepped spring cylinder clamp are provided with structures for detachable connection with the connecting piece, which include a clamping groove close to the front end of the pull block and a limiting step surface close to the rear end of the stepped spring cylinder clamp; the first semicircular connecting block and the second semicircular connecting block are provided with a fixing groove, and the front and rear sides are respectively provided with a second limiting step and a first limiting step; the fixing groove is matched with the front end of the pull block and the rear end of the stepped spring cylinder clamp, the first limiting step is matched with the clamping groove of the pull block, and the second limiting step is matched with the limiting step surface.

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