Numerical control positioning clamp for cold heading sleeve

Abstract

The invention relates to the technical field of sleeve cold heading machining, in particular to a cold heading sleeve numerical control positioning clamp which comprises a driving mechanism, a pair of clamping modules, a pair of three-level adjusting mechanisms and a plurality of translation adjusting mechanisms. The driving mechanism is used for driving the two clamping modules to get close to each other or get away from each other, each clamping module is formed by arranging a plurality of clamping pieces at intervals, and the positions of the clamping pieces on the two sides are in one-to-one correspondence. The multiple clamping pieces are arranged to form the clamping module, the positions of the clamping pieces on the two sides are in one-to-one correspondence, translation adjustment is conducted on the clamping pieces in the axial direction of the sleeve through the three-stage adjusting mechanism, the positions of the clamping pieces correspond to the positions of the positions, with different diameters, of the sleeve, and translation adjustment is conducted on the clamping pieces in the radial direction of the sleeve through the translation adjusting mechanism; the sleeve cold heading clamp can adapt to diameter changes of different parts of a sleeve, is high in positioning and clamping precision, improves sleeve cold heading machining quality and efficiency, does not need to be provided with multiple sets of clamps, and reduces enterprise cost input.

Description

Technical Field

[0001] The invention relates to the technical field of sleeve cold heading processing, in particular to a numerically controlled positioning fixture for a cold heading sleeve. Background Art

[0002] Sleeve cold upsetting is a processing technology that applies pressure to metal blanks at room temperature, and uses a mold to upset the blanks and form them into a sleeve shape through plastic deformation without generating chips. This process can effectively improve the strength and hardness of the sleeve. Specifically, the metal blanks are punched into the female mold using a male mold to form the metal blanks into the required sleeve parts.

[0003] During the cold heading process, a CNC positioning fixture is required to ensure that the blank is in the correct position so that the blank can be plastically deformed in a predetermined manner when under pressure. The existing multi-station cold heading machine uses an opening and closing clamp as a CNC positioning fixture to transfer the workpiece. The opening and closing time of each clamp can be adjusted individually, and the blank can be accurately delivered to each station for processing in turn.

[0004] Some cold heading sleeve parts are circular step-shaped with multiple levels of diameter changes. When using traditional clamps to clamp and position the sleeve parts, the clamping jaws are prone to misalignment. For circular step-shaped sleeve parts with large diameter changes, it is difficult to accurately align the positions of each level of diameter, resulting in unstable clamping. It is not only difficult to accurately control the position accuracy during the cold heading process, but also material falling will occur, affecting the quality and efficiency of the sleeve cold heading process. It can only be matched with multiple sets of CNC positioning fixtures, and the matching fixtures are replaced according to the sleeve shape for supporting processing and production. It is necessary to equip multiple sets of CNC positioning fixtures of different specifications and shapes, and multiple sets of CNC positioning fixtures are prepared, which increases the investment cost of the enterprise. Summary of the invention

[0005] The purpose of the present invention is to provide a CNC positioning fixture for cold heading sleeves with high adaptability to solve the technical problems raised in the above-mentioned background technology.

[0006] To achieve the above object, the present invention provides the following technical solutions.

[0007] A CNC positioning fixture for a cold heading sleeve comprises a driving mechanism, a pair of clamping modules, a pair of three-stage adjustment mechanisms and a plurality of translation adjustment mechanisms. The two clamping modules are symmetrically arranged on both sides below the driving mechanism. The driving mechanism is used to drive the two clamping modules to move closer to or away from each other. The clamping module is composed of a plurality of clamping members arranged at intervals. The positions of the clamping members on both sides correspond to each other one by one to cooperate in clamping. The two or three-stage adjustment mechanisms are respectively arranged above the corresponding clamping modules to respectively adjust the distance between two adjacent clamping members on the same side. Each translation adjustment mechanism is respectively arranged between the top of the clamping member and the three-stage adjustment mechanism to adjust the distance between two clamping members corresponding to the left and right positions.

[0008] Among them, the clamping member includes a second clamping member and a pair of first clamping members, and the two first clamping members are symmetrically distributed on the upper and lower sides of the second clamping member. When the sleeve is clamped, the second clamping member and the two first clamping members on the same side both contact the outer wall of the sleeve to achieve three-point clamping on one side of the sleeve.

[0009] A clamping module is formed by arranging multiple clamping parts, and the positions of the clamping parts on both sides correspond to each other. The clamping parts are translated in the axial direction of the sleeve by using a three-level adjustment mechanism to correspond to the positions at different diameters on the sleeve. The clamping parts are translated in the radial direction of the sleeve by using a translation adjustment mechanism. It can adapt to the diameter changes of different parts of the sleeve, and flexibly adjust the distance between the two clamping parts for clamping. Regardless of the increase in the number of stages or the change in the diameter of each stage, accurate clamping can be achieved through corresponding adjustments, thereby improving the quality and efficiency of sleeve cold heading processing, without the need to equip multiple sets of clamps, and reducing enterprise cost investment.

[0010] Preferably, four clamping members are provided, each clamping member also includes a mounting seat and a linkage mechanism, the linkage mechanism is arranged in the inner cavity of the mounting seat, the mounting seats are respectively installed under the corresponding translation adjustment mechanism, the linkage mechanism includes a transmission gear roller, a first rack and a second rack, the side of the mounting seat is provided with a first slide groove and a pair of second slide grooves, the first slide groove and the second slide groove both extend horizontally, a first slide arm is slidably inserted through the first slide groove, the first rack is fixed to the end of the first slide arm located in the mounting seat, and the second clamping member is arranged on the other end of the first slide arm.

[0011] A second sliding arm is inserted into the two second sliding grooves in a sliding manner, and the second racks are respectively fixed to the ends of the second sliding arms located in the mounting seat, and the first clamping members are respectively arranged on the other end of the second sliding arms. The transmission gear roller is fixedly sleeved on a shaft rod vertically rotatably installed in the mounting seat, and the transmission gear roller is meshed with the first rack and the two second racks. A horizontally extending return spring is fixed on the end face of the first rack, and the other end of the return spring is fixed to the inner side wall of the inner cavity of the mounting seat.

[0012] The first rack is located on one side of the transmission gear roller, and the two second racks are located on the other side of the transmission gear roller, so that the movement direction of the two first abutting members is opposite to that of the second abutting members.

[0013] Preferably, the driving mechanism includes a finger cylinder, a pair of connecting plates and a pair of mounting plates. Connecting plates are fixed to the ends of the telescopic rods on both sides of the finger cylinder, mounting plates are fixed to the bottoms of the two connecting plates, and two or three-level adjustment mechanisms are respectively arranged under the corresponding mounting plates.

[0014] Preferably, the three-stage adjustment mechanism includes a first externally threaded sleeve, a second externally threaded sleeve, a first threaded rod and four first nut seats, a first side frame is fixed to one side of the mounting plate surface, and a second side frame is fixed to the other side, the first externally threaded sleeve is rotatably installed on the first side frame, the second externally threaded sleeve is rotatably installed in the first externally threaded sleeve, the first threaded rod is rotatably installed in the second externally threaded sleeve, and one end is rotatably connected to the side of the second side frame.

[0015] One of the first nut seats is rotatably mounted on the first externally threaded sleeve and fixed to the side of the first side frame. The other three first nut seats are threadably matched and mounted on the first externally threaded sleeve, the second externally threaded sleeve and the first threaded rod. A sliding rod is fixed between the side of the first nut seat fixed to the first side frame and the side of the second side frame. The remaining three first nut seats are slidably mounted on the sliding rod through sliding holes, and each mounting seat is installed under the corresponding first nut seat through a translation adjustment mechanism.

[0016] Preferably, the translation adjustment mechanism includes an L-shaped platform fixed to the bottom of the first nut seat, a second threaded rod horizontally rotatably mounted on the L-shaped platform, and a second nut seat with thread matching and mounted on the second threaded rod. Each mounting seat is correspondingly fixed to the bottom of the second nut seat. A horizontally extending guide rod is also fixed on the L-shaped platform, and the second nut seat is slidably mounted on the guide rod.

[0017] Preferably, the first abutting member is a circular rod body and is respectively fixed on the outer end portion of the corresponding second sliding arm.

[0018] Preferably, the second clamping member is a groove body having a V-shaped abutment on the side that contacts the outer wall of the sleeve, and each groove body is fixed on the outer end of the corresponding first rack, and each groove body is fixed with an elastic airbag that contacts and squeezes the outer wall of the sleeve. The elastic airbag is in an inflated state, and the elastic airbags extend to the outside of the groove body at the V-shaped abutment, wherein the cross-section of the elastic airbag extending straight to the outside of the groove body is an arc shape convex outward.

[0019] Preferably, each slide rod is provided with anti-slipping protrusions at intervals to provide a blocking and anti-slipping effect for the three first nut seats thread-matched and installed on the first externally threaded sleeve, the second externally threaded sleeve and the first threaded rod.

[0020] Preferably, a first handle is installed on the end of the first externally threaded sleeve away from the second side frame, a second handle is installed on the end of the second externally threaded sleeve away from the second side frame, and a third handle is installed on the end of the first threaded rod away from the second side frame.

[0021] Preferably, one end of each second threaded rod extends through the outside of the L-shaped platform and is respectively provided with a fourth handle.

[0022] Compared with the prior art, the beneficial effects of the present invention are as follows.

[0023] The present invention forms a clamping module by arranging multiple clamping members, and the positions of the clamping members on both sides correspond to each other. The clamping members are translated in the axial direction of the sleeve by utilizing a three-stage adjustment mechanism to correspond to the positions at different diameters on the sleeve. The clamping members are translated in the radial direction of the sleeve by utilizing a translation adjustment mechanism, thereby adapting to the diameter changes of different parts of the sleeve and flexibly adjusting the distance between the two clamping members that cooperate to clamp. Regardless of the increase in the number of stages or the change in the diameter of each stage, accurate clamping can be achieved through corresponding adjustments, thereby improving the quality and efficiency of cold heading processing of the sleeve, and there is no need to equip multiple sets of clamps, thereby reducing enterprise cost investment.

[0024] No matter the clamping member is adjusted for translation along the axial direction or radial direction of the sleeve, the heights of the second clamping members and the first clamping members remain unchanged, and when clamping different diameters on the sleeve after adjusting the position of the clamping member, the second clamping member and the first clamping member adapt to the change in the diameter of the sleeve by changing the displacement in the horizontal direction. Combined with the finger cylinder driving the two clamping members to move the same amount, it is ensured that the clamped sleeve is not positioned in the vertical direction or the horizontal direction, thereby achieving a self-centering effect, ensuring that the sleeve is always aligned with the mold, improving the sleeve processing accuracy, ensuring product quality, avoiding processing deviations caused by sleeve displacement, and reducing the defective rate.

[0025] The present invention uses a self-centering adjustment mechanism to ensure that the spacing between the clamps in the clamp group will not change when the sleeve is clamped no matter how the position of the clamp is adjusted. There is no need to additionally reprogram and adjust the control parameters of the moving module for driving the clamp to move, thus saving the time spent on reprogramming and debugging, making the production process smoother and further improving the efficiency of the sleeve cold heading process.

[0026] The present invention arranges the first externally threaded sleeve, the second externally threaded sleeve and the first threaded rod in a stacked coaxial arrangement, and the two are rotatably connected to each other, so as to individually drive the corresponding first nut seat for translational adjustment, thereby effectively saving space, making the structure of the entire device more compact, and being conducive to the miniaturization and integration of the clamp, so that the clamp is suitable for a working environment with limited space between the male mold and the female mold, while ensuring that the movements of the first nut seats do not interfere with each other, thereby improving the flexibility and accuracy of adjustment.

[0027] When the present invention utilizes the second clamping member and the two first clamping members to perform three-point clamping on one side of the sleeve, the two first clamping members abut against the outer wall of the sleeve, the upper and lower ends of the V-shaped abutment on the groove body abut against the outer wall of the sleeve, and the elastic airbag is squeezed by the outer wall of the sleeve. Since it is in an inflated state, the elastic airbag is adaptively adjusted according to the shape and surface condition of the outer wall of the sleeve, so that it can better fit on the outer wall of the sleeve, increase the clamping area with the outer wall of the sleeve, and effectively improve the stability of the sleeve when clamping. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a three-dimensional schematic diagram of the overall structure of the present invention;

[0029] Figure 2 for Figure 1 A schematic diagram of a local structure of the structure shown;

[0030] Figure 3 for Figure 2 A schematic diagram of another viewing angle of the structure shown;

[0031] Figure 4 It is a schematic diagram of the three-stage adjustment mechanism in the present invention;

[0032] Figure 5 for Figure 4 A schematic diagram of a local structure of the structure shown;

[0033] Figure 6 It is a detailed structural diagram of the translation adjustment mechanism in the present invention;

[0034] Figure 7 It is a schematic diagram of the structure of the clamping member in the present invention;

[0035] Figure 8 is a detailed structural diagram of the second abutting member in the present invention;

[0036] Fig. 9 This is one of the schematic diagrams of the linkage mechanism structure in the present invention;

[0037] Fig.10 This is the second schematic diagram of the linkage mechanism structure in the present invention;

[0038] Fig.11This is a schematic diagram of the CNC positioning fixture clamping at different diameter positions on the sleeve;

[0039] Fig.12 It is a schematic diagram of the structure in which the first abutting member and the second abutting member abut against the outer wall of the sleeve;

[0040] Fig.13 for Fig.12 A schematic diagram of the enlarged structure in FIG.

[0041] In the figure: 1, driving mechanism; 11, finger cylinder; 12, connecting plate; 13, mounting plate; 2, three-stage adjustment mechanism; 21, first external threaded sleeve; 211, first pinch handle; 22, second external threaded sleeve; 221, second pinch handle; 23, first threaded rod; 231, third pinch handle; 24, first nut seat; 241, sliding hole; 25, sliding rod; 251, anti-dropping protrusion; 26, first side frame; 27, second side frame; 3, translation adjustment mechanism; 31, L-shaped frame Table; 32, second threaded rod; 321, third pinch handle; 33, second nut seat; 34, guide rod; 4, clamping member; 5, mounting seat; 51, first slide groove; 52, second slide groove; 6, linkage mechanism; 61, shaft rod; 62, transmission gear roller; 63, first slide arm; 64, first rack; 65, return spring; 66, second slide arm; 67, second rack; 7, first fastening member; 8, second fastening member; 81, groove body; 82, V-shaped butt; 83, elastic airbag. DETAILED DESCRIPTION

[0042] See also Figure 1-Figure 13 The present invention provides a CNC positioning fixture for a cold heading sleeve. The embodiments of the present invention are described below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0043] The present cold heading sleeve CNC positioning fixture comprises a driving mechanism 1, a pair of clamping modules, a pair of three-stage adjustment mechanisms 2 and a plurality of translation adjustment mechanisms 3. The two clamping modules are symmetrically arranged on both sides below the driving mechanism 1. The driving mechanism 1 is used to drive the two clamping modules to move closer to or away from each other. The clamping module is composed of a plurality of clamping members 4 arranged at intervals. The positions of the clamping members 4 on both sides correspond one to one to cooperate in clamping. The two or three-stage adjustment mechanisms 2 are respectively arranged above the corresponding clamping modules for respectively adjusting the distance between two adjacent clamping members 4 on the same side. Each translation adjustment mechanism 3 is respectively arranged between the top of the clamping member 4 and the three-stage adjustment mechanism 2 for adjusting the distance between the two clamping members 4 corresponding to the left and right positions.

[0044] When the sleeve is cold headed and clamped and positioned using the CNC positioning fixture, the drive mechanism 1 drives the two clamping modules closer to each other, so that the sleeve can be clamped and positioned to ensure that the sleeve is in the correct position during cold heading. The drive mechanism 1 drives the two clamping modules away from each other to release the sleeve.

[0045] The positions of the clamping members 4 in the two clamping modules correspond to each other. Specifically, the two clamping members 4 are brought close to each other to achieve clamping of the sleeve blank.

[0046] It should be noted that multiple CNC positioning fixtures in the present application are arranged in an array on the mobile module to form a fixture group, and the positions correspond one-to-one to the positions of each female mold. The mobile module is used to drive each CNC positioning fixture to convey the blank in sequence to realize the continuous cold heading process of the circular step sleeve. The movement amount and movement timing of the mobile module driving the fixture and the clamping amount and clamping timing of the two clamping modules driven by the driving mechanism 1 are all controlled by parameter programming, and cooperate with the movement of the cold heading mold to realize CNC operation.

[0047] In the specific sleeve cold heading process, as the process progresses, the blank is gradually formed and the number of steps increases. By operating the three-stage adjustment mechanism 2, the clamping member 4 is adjusted in translation in the axial direction of the sleeve so that the clamping member 4 corresponds to the positions of different diameters on the sleeve one by one. Then, by operating the translation adjustment mechanism 3, the clamping member 4 is adjusted in translation in the radial direction of the sleeve to adjust the spacing between the two clamping members 4 that are clamped together to adapt to the different diameters on the sleeve. Therefore, when the driving amount provided by the driving mechanism 1 is the same, the clamping members 4 at each position can be clamped at different positions on the stepped sleeve.

[0048] The present invention forms a clamping module by arranging multiple clamping members 4, and the positions of the clamping members 4 on both sides correspond to each other. The clamping members 4 are translated in the axial direction of the sleeve by using a three-stage adjustment mechanism 2 to correspond to the positions at different diameters on the sleeve. The clamping members 4 are translated in the radial direction of the sleeve by using a translation adjustment mechanism 3. This can adapt to the diameter changes of different parts of the sleeve, and flexibly adjust the distance between the two clamping members 4 that are clamped together. Regardless of the increase in the number of stages or the change in the diameter of each stage, accurate clamping can be achieved through corresponding adjustments, thereby improving the quality and efficiency of the sleeve cold heading processing, and there is no need to equip multiple sets of clamps, thereby reducing the cost investment of the enterprise.

[0049] like Figure 1 As shown, the driving mechanism 1 includes a finger cylinder 11, a pair of connecting plates 12 and a pair of mounting plates 13. Connecting plates 12 are fixed to the ends of the telescopic rods on both sides of the finger cylinder 11, and mounting plates 13 are fixed to the bottoms of the two connecting plates 12. Two or three-level adjustment mechanisms 2 are respectively arranged under the corresponding mounting plates 13, wherein the finger cylinder 11 adopts a wide-shaped air claw cylinder with model NMHL2.

[0050] Through the operation of the finger cylinder 11, the telescopic rods on both sides can drive the connecting plates 12 on both sides to move closer or farther from each other. Under the connection of the mounting plate 13, the clamping parts 4 on both sides are driven to move closer or farther synchronously, providing effective driving for the clamping and releasing actions.

[0051] See also Figure 1 , Figure 2 , Figure 3 , Figure 7 , Fig. 9 and Fig.10 There are four clamping members 4, each of which includes a mounting seat 5, a linkage mechanism 6, a second abutting member 8 and a pair of first abutting members 7. The two first abutting members 7 are symmetrically distributed on the upper and lower sides of the second abutting member 8. The linkage mechanism 6 is arranged in the inner cavity of the mounting seat 5, and the mounting seat 5 is respectively installed under the corresponding translation adjustment mechanism 3. The linkage mechanism 6 includes a transmission gear roller 62, a first rack 64 and a second rack 67. A first slide groove 51 and a pair of second slide grooves 52 are provided on the side of the mounting seat 5. The first slide groove 51 and the second slide groove 52 both extend horizontally. A first slide arm 63 is slidably inserted through the first slide groove 51. The first rack 64 is fixed to the end of the first slide arm 63 located in the mounting seat 5, and the second abutting member 8 is arranged on the other side end of the first slide arm 63.

[0052] A second slide arm 66 is inserted into the two second slide grooves 52 in a sliding manner. The second rack 67 is fixed to the end of the second slide arm 66 located in the mounting seat 5. The first clamping member 7 is arranged on the other end of the second slide arm 66. The transmission gear roller 62 is fixedly sleeved on the shaft 61 which is vertically rotatably installed in the mounting seat 5. The transmission gear roller 62 is a roller body structure with teeth on the outer surface, which is consistent with the working principle of the gear, but the difference is that its length is greater than the thickness of the conventional gear.

[0053] The transmission gear roller 62 is meshed with the first rack 64 and the two second racks 67. A horizontally extending return spring 65 is fixed on the end face of the first rack 64. The other end of the return spring 65 is fixed to the inner wall of the inner cavity of the mounting seat 5, wherein the first rack 64 is located on one side of the transmission gear roller 62, and the two second racks 67 are located on the other side of the transmission gear roller 62, so that the movement direction of the two first clamping members 7 is opposite to that of the second clamping member 8.

[0054] The telescopic rods on both sides of the finger cylinder 11 retract to drive the mounting seats 5 on both sides to approach each other. After the second abutting member 8 contacts the outer wall of the sleeve, as the telescopic rods of the finger cylinder 11 continue to retract, the second abutting member 8 is compressed and pushes the first sliding arm 63 and the first rack 64 to retract inward. At this time, the return spring 65 is compressed and stores force, and the first rack 64 meshes to drive the transmission gear roller 62 to rotate. The rotating transmission gear roller 62 meshes to drive the two second racks 67 to move outward. Under the connection of the two second sliding arms 66, the two first abutting members 7 are driven to synchronously approach the side away from the mounting seat 5 until the two first abutting members 7 conflict with the outer wall of the sleeve. Fig.11 As shown, the sleeve can be clamped, and the second clamping member 8 and the two first clamping members 7 on the same side realize three-point clamping on one side of the sleeve, and the double-sided three-point clamping effectively ensures the firmness of the sleeve clamping.

[0055] When the clamping is cancelled, the driving mechanism 1 works to drive the clamping members 4 on both sides to move away from each other, and the interference and squeezing of the outer wall of the sleeve on the second clamping member 8 is cancelled. Under the elastic reset action of the reset spring 65, the first rack 64, the first slide arm 63 and the second clamping member 8 can be driven to move and reset. The first rack 64 engages to drive the transmission gear roller 62 to rotate, and the rotating transmission gear roller 62 engages to drive the second rack 67 and drives the second slide arm 66 and the first clamping member 7 to retreat and reset for the next clamping.

[0056] In addition, no matter whether the clamping member 4 is adjusted for translation along the axial direction or radial direction of the sleeve, the height of each second clamping member 8 and the first clamping member 7 remains unchanged, and when the position of the clamping member 4 is adjusted to clamp different diameters on the sleeve, the second clamping member 8 and the first clamping member 7 adapt to the change in the sleeve diameter by changing the displacement in the horizontal direction. Combined with the finger cylinder 11, the movement amount of the clamping of the two clamping members 4 is consistent, ensuring that the clamped sleeve is not located in the vertical direction or the horizontal direction, thereby achieving a self-centering effect, ensuring that the sleeve is always aligned with the mold, improving the sleeve processing accuracy, ensuring product quality, avoiding processing deviations caused by sleeve displacement, and reducing the defective rate.

[0057] In addition, through the self-centering adjustment mechanism, no matter how the position of the clamp 4 is adjusted, the spacing between the clamps in the clamp group will not change when the sleeve is clamped, and there is no need to additionally reprogram and adjust the control parameters of the moving module used to drive the clamp to move, which saves the time spent on reprogramming and debugging, makes the production process smoother, and further improves the efficiency of the sleeve cold heading process.

[0058] See also Figure 2 , Figure 3 , Figure 4 and Figure 5The three-stage adjustment mechanism 2 includes a first externally threaded sleeve 21, a second externally threaded sleeve 22, a first threaded rod 23 and four first nut seats 24. A first side frame 26 is fixed to one side of the surface of the mounting plate 13, and a second side frame 27 is fixed to the other side. The first externally threaded sleeve 21 is rotatably installed on the first side frame 26, and the second externally threaded sleeve 22 is rotatably installed in the first externally threaded sleeve 21. The first threaded rod 23 is rotatably installed in the second externally threaded sleeve 22, and one end is rotatably connected to the side of the second side frame 27. One of the first nut seats 24 is rotatably sleeved on the first externally threaded sleeve 21 and fixed to the side of the first side frame 26. The first nut seat 24 rotates with the first externally threaded sleeve 21 and is fixed to the first side frame 26. Therefore, when the first externally threaded sleeve 21 is rotated to adjust, the first externally threaded sleeve 21 will not be threadedly driven with the first nut seat 24.

[0059] The other three first nut seats 24 are respectively threadedly matched and mounted on the first externally threaded sleeve 21, the second externally threaded sleeve 22 and the first threaded rod 23. A sliding rod 25 is fixed between the side of the first nut seat 24 fixed to the first side frame 26 and the side of the second side frame 27. The remaining three first nut seats 24 are slidably mounted on the sliding rod 25 through the sliding hole 241. Each mounting seat 5 is respectively installed under the corresponding first nut seat 24 through the translation adjustment mechanism 3. A first pinch handle 211 is installed on the end of the first externally threaded sleeve 21 away from the second side frame 27, a second pinch handle 221 is installed on the end of the second externally threaded sleeve 22 away from the second side frame 27, and a third pinch handle 231 is installed on the end of the first threaded rod 23 away from the second side frame 27.

[0060] By pinching the first handle 211 to screw the first externally threaded sleeve 21, the rotating first externally threaded sleeve 21 can independently drive the first nut seat 24 threadedly connected to it to be translated along the slide rod 25 for adjustment; by pinching the second handle 221 to screw the second externally threaded sleeve 22, the rotating second externally threaded sleeve 22 can independently drive the first nut seat 24 threadedly connected to it to be translated along the slide rod 25 for adjustment; by pinching the third handle 231 to screw the first threaded rod 23, the rotating first threaded rod 23 can independently drive the first nut seat 24 threadedly connected to it to be translated along the slide rod 25 for adjustment, thereby providing drive for the movement adjustment of the three clamping parts 4 along the axial direction of the sleeve.

[0061] The first externally threaded sleeve 21, the second externally threaded sleeve 22 and the first threaded rod 23 are arranged coaxially in a stacked manner and are rotatably connected to each other, so as to individually drive the corresponding first nut seat 24 for translational adjustment, thereby effectively saving space and making the structure of the entire device more compact, which is conducive to the miniaturization and integration of the clamp, making the clamp suitable for a working environment with limited space between the male mold and the female mold, while ensuring that the movement of the first nut seat 24 does not interfere with each other, thereby improving the flexibility and accuracy of the adjustment.

[0062] It is worth noting that the second externally threaded sleeve 22 is rotatably connected to the inner wall of the first externally threaded sleeve 21 via a bearing, and the first threaded rod 23 is rotatably connected to the inner wall of the second externally threaded sleeve 22 via a bearing, thereby ensuring that the second externally threaded sleeve 22 and the first externally threaded sleeve 21 and the first threaded rod 23 and the second externally threaded sleeve 22 have the ability to rotate relative to each other.

[0063] In addition, in order to avoid the second externally threaded sleeve 22 and the first threaded rod 23 from rotating when the first externally threaded sleeve 21 is rotated and adjusted, the first externally threaded sleeve 21 and the first threaded rod 23 are rotated when the second externally threaded sleeve 22 is rotated and adjusted, and the first externally threaded sleeve 21 and the second externally threaded sleeve 22 are rotated when the first threaded rod 23 is rotated and adjusted, a rubber sleeve (not numbered in the figure) is fixed to the outer wall of the sliding rod 25, and the rubber sleeve is interference fit with the sliding hole 241. The rubber sleeve is squeezed by the inner wall of the sliding hole 241 to provide a damping effect for the first nut seat 24 to slide along the sliding rod 25.

[0064] Anti-slipping protrusions 251 are provided at intervals on each sliding rod 25 to provide blocking and anti-slipping effects for the three first nut seats 24 threadedly matched and installed on the first externally threaded sleeve 21, the second externally threaded sleeve 22 and the first threaded rod 23. Specifically, one of the anti-slipping protrusions 251 is aligned with the end of the first externally threaded sleeve 21 away from the first pinch handle 211 to prevent the first nut seat 24 on the first externally threaded sleeve 21 from excessive movement and detachment from the first externally threaded sleeve 21; one of the anti-slipping protrusions 251 is aligned with the end of the second externally threaded sleeve 22 away from the second pinch handle 221 to prevent the first nut seat 24 on the second externally threaded sleeve 22 from excessive movement and detachment from the second externally threaded sleeve 22; and the first nut seat 24 on the first threaded rod 23 will not detach from the first threaded rod 23 under the blocking action of the second side frame 27.

[0065] See also Figure 6The translation adjustment mechanism 3 includes an L-shaped platform 31 fixed to the bottom of the first nut seat 24, a second threaded rod 32 horizontally rotatably mounted on the L-shaped platform 31, and a second nut seat 33 with thread matching and mounted on the second threaded rod 32. Each mounting seat 5 is correspondingly fixed to the bottom of the second nut seat 33. A horizontally extending guide rod 34 is also fixed on the L-shaped platform 31. The second nut seat 33 is slidably mounted on the guide rod 34. One end of each second threaded rod 32 extends through and extends to the outside of the L-shaped platform 31, and is respectively provided with a fourth handle 321.

[0066] By pinching the fourth handle 321 to screw the second threaded rod 32, the rotating second threaded rod 32 can threadably drive the second nut seat 33 to slide along the guide rod 34, and drive the clamping member 4 to move synchronously, providing stable drive for the translation adjustment of the clamping member 4 along the radial direction of the sleeve.

[0067] In addition, it is worth noting that the screwing adjustment of the first externally threaded sleeve 21, the second externally threaded sleeve 22, the first threaded rod 23 and each second threaded rod 32 in the present application is manually operated, and the adjustment amount during manual operation can be calculated based on data such as the fixture structure size and the sleeve structure size. In addition, as a preferred solution, a motor can be arranged to realize the electric drive of the rotation adjustment of the first externally threaded sleeve 21, the second externally threaded sleeve 22, the first threaded rod 23 and each second threaded rod 32, and the motor drive adopts the existing technology, which will not be described in detail in this application.

[0068] See also Figure 7 and Figure 8 The first clamping member 7 is a circular rod body, and is respectively fixed on the outer end of the corresponding second sliding arm 66. The second clamping member 8 is a groove body 81 with a V-shaped abutment 82 on the side that contacts the outer wall of the sleeve. Each groove body 81 is respectively fixed on the outer end of the corresponding first rack 64. An elastic airbag 83 that contacts and squeezes the outer wall of the sleeve is fixed in each groove body 81. The elastic airbag 83 is inflated, and the elastic airbag 83 extends to the outside of the groove body 81 at the V-shaped abutment 82, wherein the cross-section of the elastic airbag 83 extending straight to the outside of the groove body 81 is an arc shape convex outward.

[0069] When the second abutting member 8 and the two first abutting members 7 are used to clamp one side of the sleeve at three points, the two first abutting members 7 abut against the outer wall of the sleeve, and the upper and lower ends of the V-shaped abutment 82 on the groove body 81 abut against the outer wall of the sleeve. Fig.12 and Fig.13 As shown, the elastic airbag 83 is squeezed by the outer wall of the sleeve. Since it is in an inflated state, the elastic airbag 83 is adaptively adjusted according to the shape and surface condition of the outer wall of the sleeve, so that it can better fit on the outer wall of the sleeve, increase the clamping area with the outer wall of the sleeve, and effectively improve the stability of the sleeve when clamping.

[0070] The second abutting member 8 is clamped by the upper and lower ends of the V-shaped abutment 82 abutting against the outer wall of the sleeve and the elastic airbag 83 being squeezed and fitted against the outer wall of the sleeve, which can be regarded as the clamping point of the second abutting member 8 as a whole.

[0071] It is obvious to those skilled in the art that the present invention is not limited to the details of the above exemplary embodiments, and that the present invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the present invention.

Claims

1. A cold heading sleeve numerical control positioning fixture, comprising a driving mechanism, characterized in that: Also includes: A pair of clamping modules, the two clamping modules are symmetrically arranged on both sides below the driving mechanism, the driving mechanism is used to drive the two clamping modules to move closer to or away from each other, the clamping module is composed of a plurality of clamping members arranged at intervals, and the positions of the clamping members on both sides correspond to each other to cooperate and achieve clamping; A pair of three-stage adjustment mechanisms, wherein the two three-stage adjustment mechanisms are respectively arranged above the corresponding clamping modules, and are used to respectively adjust the distance between the two adjacent clamping members on the same side; A plurality of translation adjustment mechanisms, each of which is disposed between the top of the clamping member and the three-stage adjustment mechanism, and is used to adjust the distance between the two clamping members corresponding to the left and right positions; Among them, the clamping member includes a second clamping member and a pair of first clamping members, and the two first clamping members are symmetrically distributed on the upper and lower sides of the second clamping member. When clamping the sleeve, the second clamping member and the two first clamping members on the same side both contact the outer wall of the sleeve to achieve three-point clamping on one side of the sleeve.

2. According to claim 1, a cold heading sleeve numerical control positioning fixture is characterized in that: There are four clamping members, each of which further includes a mounting seat and a linkage mechanism, wherein the linkage mechanism is arranged in the inner cavity of the mounting seat, and the mounting seats are respectively installed below the corresponding translation adjustment mechanism; The linkage mechanism includes a transmission gear roller, a first rack and a second rack; A first slide groove and a pair of second slide grooves are provided on the side of the mounting seat, and the first slide groove and the second slide groove both extend horizontally; A first sliding arm is inserted and slidably inserted in the first sliding groove, the first rack is fixed to the end of the first sliding arm located in the mounting seat, and the second abutting member is arranged on the other end of the first sliding arm; The second sliding arms are inserted into the two second sliding grooves in a sliding manner, the second racks are respectively fixed to the ends of the second sliding arms located in the mounting seat, and the first abutting members are respectively arranged on the other ends of the second sliding arms; The transmission gear roller is fixedly sleeved on a shaft which is vertically rotatably mounted in the mounting seat, and the transmission gear roller is meshed with both the first rack and the two second racks; A horizontal return spring is fixed on the end surface of the first rack, and the other end of the return spring is fixed to the inner wall of the inner cavity of the mounting seat; Wherein, the first rack is located on one side of the transmission gear roller, and the two second racks are located on the other side of the transmission gear roller, so that the movement direction of the two first pressing members is opposite to that of the second pressing members.

3. According to claim 2, a cold heading sleeve numerical control positioning fixture is characterized in that: The driving mechanism includes a finger cylinder, a pair of connecting plates and a pair of mounting plates; The connecting plates are fixed to the ends of the telescopic rods on both sides of the finger cylinder; The bottom of the two connecting plates are fixed with the mounting plates; The two three-stage adjustment mechanisms are respectively arranged below the corresponding mounting plates.

4. The cold heading sleeve numerical control positioning fixture according to claim 3, characterized in that: The three-stage adjustment mechanism includes a first externally threaded sleeve, a second externally threaded sleeve, a first threaded rod and four first nut seats; A first side frame is fixed to one side of the surface of the mounting plate, and a second side frame is fixed to the other side; The first externally threaded sleeve is rotatably installed on the first side frame in a through-type manner, and the second externally threaded sleeve is rotatably installed in the first externally threaded sleeve in a through-type manner; The first threaded rod is rotatably installed in the second external threaded sleeve, and one end is rotatably connected to the side portion of the second side frame; One of the first nut seats is rotatably sleeved on the first externally threaded sleeve and fixed to the side portion of the first side frame, and the other three first nut seats are respectively sleeved on the first externally threaded sleeve, the second externally threaded sleeve and the first threaded rod in a threaded matching manner; A sliding rod is fixed between the side portion of the first nut seat fixed to the first side frame and the side portion of the second side frame, and the remaining three first nut seats are slidably mounted on the sliding rod through sliding holes; Each of the mounting seats is mounted below the corresponding first nut seat through the translation adjustment mechanism.

5. The cold heading sleeve numerical control positioning fixture according to claim 4, characterized in that: The translation adjustment mechanism comprises an L-shaped stand fixed to the bottom of the first nut seat, a second threaded rod horizontally rotatably mounted on the L-shaped stand, and a second nut seat with matching threads sleeved on the second threaded rod; Each of the mounting seats is correspondingly fixed to the bottom of the second nut seat; A horizontally extending guide rod is also fixed on the L-shaped platform, and the second nut seat is slidably sleeved on the guide rod.

6. The cold heading sleeve numerical control positioning fixture according to claim 2, characterized in that: The first fastening members are circular rods and are respectively fixed on the outer ends of the corresponding second sliding arms.

7. The cold heading sleeve numerical control positioning fixture according to claim 2, characterized in that: The second abutting member is a groove body having a V-shaped abutment on the side abutting against the outer wall of the sleeve, and each of the groove bodies is respectively fixed on the outer end of the corresponding first rack; An elastic airbag is fixed in each of the grooves and is in an inflated state. The elastic airbag is in contact with and squeezed against the outer wall of the sleeve. The elastic airbags all extend from the V-shaped abutment to the outside of the tank body; Wherein, the cross-section of the elastic airbag extending to the outside of the slot body is in an arc shape convex outward.

8. The cold heading sleeve numerical control positioning fixture according to claim 4, characterized in that: Anti-slipping protrusions are provided at intervals on each of the slide rods to provide a blocking and anti-slipping effect for the three first nut seats that are thread-matched and installed on the first externally threaded sleeve, the second externally threaded sleeve and the first threaded rod.

9. The cold heading sleeve numerical control positioning fixture according to claim 4, characterized in that: A first handle is installed on the end of the first externally threaded sleeve away from the second side frame, a second handle is installed on the end of the second externally threaded sleeve away from the second side frame, and a third handle is installed on the end of the first threaded rod away from the second side frame.

10. The cold heading sleeve numerical control positioning fixture according to claim 5, characterized in that: One end of each of the second threaded rods extends through the outside of the L-shaped platform and is respectively provided with a fourth handle.

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