Fixing device for clamping jaw oil cylinder of cold-drawing machine

Abstract

The utility model belongs to the technical field of cold-drawing machines, and particularly relates to a cold-drawing machine clamping jaw oil cylinder fixing device which comprises a fixing frame, a clamping jaw oil cylinder containing cavity is formed in the fixing frame, and the clamping jaw oil cylinder containing cavity vertically penetrates through the outside from a through hole formed in one vertical face of the fixing frame. A plurality of positioning protrusions are further arranged in the fixing frame, the positioning protrusions are arranged towards the axis of the clamping jaw oil cylinder containing cavity, and an abutting face is arranged on the vertical face of the opposite side of the through hole. The fixing frame can fix the clamping jaw oil cylinder in all directions, the tail limiting plate and the fastening ring are arranged in the axial direction of the clamping jaw oil cylinder for locking, the clamping jaw oil cylinder is prevented from displacing in the confronting process of the clamping jaw oil cylinder and the forming die, and the positioning protrusions are arranged in the radial direction for positioning and supporting a cylinder body of the clamping jaw oil cylinder. The clamping jaw oil cylinder is prevented from deflecting when the pipe wall is stressed unevenly, so that the fluency during pipe stretching and the straightness after stretching are guaranteed, and meanwhile the clamping jaw oil cylinder is prevented from being damaged due to deflection stress.

Description

Technical Field

[0001] The utility model belongs to the technical field of cold drawing machines, and in particular relates to a clamping jaw oil cylinder fixing device for a cold drawing machine. Background Art

[0002] The cold drawing machine is used to draw ferrous and nonferrous metal bars at room temperature and to perform secondary processing on rough pipes after hot rolling and extrusion. The drawing trolley is supported by two I-shaped guide rails and driven by the main oil cylinder to make the trolley run along the I-shaped guide rails. The main oil cylinder and the drawing trolley can be axially fixed to the trolley body through an adjustable split piston.

[0003] A steel pipe cold drawing machine disclosed in patent CN209094191U includes a main machine base, a cold drawing machine base and a drawing die machine base, the rear end face of the main machine base is provided with a feed machine base, a propulsion mechanism is provided at the center of the front end face of the feed machine base, the rear end face of the propulsion mechanism is fixedly mounted on the front end face of the feed machine base, and the front end face of the propulsion mechanism contacts the rear end face of the steel pipe, the steel pipe is placed at the notch of the V-groove, the lower end of the V-groove is fixed to the working plane of the feed machine base, the lower end of the drawing die machine base is provided with an I-shaped notch, and the lower end face of the I-shaped notch is provided with a through groove. Compared with the prior art, the utility model has a simple structure, a simplified transmission process, uses the discharge port to reduce the impact of the pipe, realizes the installation and disassembly of the mold, increases the versatility of the utility model, and has a high practical value.

[0004] In the above scheme, the discharge port is used to reduce the impact of the pipe and realize the installation and disassembly of the mold, which increases the versatility of the utility model and has a high practical value. However, the hydraulic cylinder in the scheme lacks stability reinforcement and calibration function during installation, because the movement and deflection of the hydraulic cylinder during the cold drawing process will cause problems with the straightness of the pipe, and the long-term reaction of the molding mold will in turn cause damage to the hydraulic cylinder. Utility Model Content

[0005] The purpose of the utility model is to provide a cold drawing machine clamping jaw oil cylinder fixing device which can solve the above technical problems.

[0006] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0007] A cold drawing machine jaw cylinder fixing device comprises a fixing frame, wherein a jaw cylinder accommodating chamber is arranged inside the fixing frame, and the jaw cylinder accommodating chamber vertically passes through a through hole opened on one of the vertical surfaces of the fixing frame to the outside, and a plurality of positioning protrusions are also arranged inside the fixing frame, and the positioning protrusions are arranged toward the axial center line of the jaw cylinder accommodating chamber, and a supporting surface is arranged on the vertical surface on the opposite side of the through hole.

[0008] In the cold drawing machine jaw cylinder fixing device, the fixing frame includes two upright limit plates and a connecting plate, the through hole is opened on one of the limit plates, the abutment surface is arranged on the other limit plate, and the connecting plate connects the limit plates to each other.

[0009] In the cold drawing machine clamping jaw oil cylinder fixing device, a fastening ring is sleeved in the through hole, and a thread is arranged on the ring surface of the fastening ring to be threadedly connected with the inner wall of the through hole.

[0010] In the cold drawing machine jaw oil cylinder fixing device, an abutment ring is provided on the end surface of the fastening ring outside the fixing frame, and the abutment ring extends toward the center of the fastening ring.

[0011] In the cold drawing machine jaw oil cylinder fixing device, a buffer layer is arranged on the inner wall of the fastening ring, a lever slot is opened on the outer wall of the fastening ring, and the lever slot is arranged toward the axis of the fastening ring.

[0012] In the cold drawing machine jaw cylinder fixing device, the limit plate is provided with abutment slot, the abutment slot is arranged concentrically with the through hole, and the abutment surface is arranged on the slot wall of the abutment slot.

[0013] In the cold drawing machine clamping jaw oil cylinder fixing device, a screw hole is provided at the center of the circle of the abutting slot, and a bolt inserted from outside the fixing frame is provided on the screw hole.

[0014] In the cold drawing machine jaw cylinder fixing device, the positioning protrusion is arranged at the junction of the connecting plate and the inner bottom surface of the fixed frame, and the distance from the contact end of each positioning protrusion to the axial center line of the jaw cylinder accommodating cavity is equal to the distance from the inner bottom surface of the fixed frame to the axial center line of the jaw cylinder accommodating cavity.

[0015] In the cold drawing machine clamping cylinder fixing device, the outer bottom surface of the fixing frame is provided with plug-in support legs, and the mid-vertical line of the plug-in support legs passes through the axis line of the clamping cylinder accommodating cavity.

[0016] In the cold drawing machine jaw oil cylinder fixing device, a heat dissipation skylight is provided on the top of the fixing frame.

[0017] The advantages of the utility model are:

[0018] The fixed frame can fix the jaw cylinder in all directions. The jaw cylinder is locked with a tail limit plate and a fastening ring in the axial direction to prevent the jaw cylinder from being displaced when confronting the forming mold. There are positioning protrusions in the radial direction to position and support the cylinder body of the jaw cylinder to prevent the jaw cylinder from deflecting when the force on the pipe wall is uneven, thereby ensuring the smoothness of the pipe during stretching and the straightness after stretching, and at the same time preventing the jaw cylinder from being damaged due to deflection force. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall structure of the utility model.

[0020] Figure 2 It is a schematic diagram of the structure of the front limiting plate of the utility model.

[0021] Figure 3 This is a schematic diagram of the structure of the connecting plate of the utility model.

[0022] Figure 4 It is a schematic diagram of the structure of the rear limiting plate of the utility model.

[0023] In the figure, there are a fixed frame 1, a through hole 11, a positioning protrusion 12, an abutting surface 13, a limiting plate 14, a connecting plate 15, an abutting slot 16, an inserting support foot 17, a clamping jaw cylinder accommodating chamber 2, a fastening ring 3, and an abutting retaining ring 31. DETAILED DESCRIPTION

[0024] The following are specific embodiments of the utility model and the accompanying drawings to further describe the technical solution of the utility model, but the utility model is not limited to these embodiments.

[0025] like Figure 1-Figure 4 As shown, the cold drawing machine jaw cylinder fixing device includes a fixing frame 1, a jaw cylinder accommodating chamber 2 is arranged inside the fixing frame 1, the jaw cylinder accommodating chamber 2 vertically penetrates the outside from a through hole 11 opened on one of the vertical surfaces of the fixing frame 1, and a plurality of positioning protrusions 12 are also arranged in the fixing frame 1, and the positioning protrusions 12 are arranged toward the axial center line of the jaw cylinder accommodating chamber 2, and a supporting surface 13 is arranged on the vertical surface on the opposite side of the through hole 11.

[0026] That is, there are a rear limit plate 14 and a front limit plate 14 for locking the jaw cylinder axially to prevent the jaw cylinder from being displaced in the confrontation with the forming mold, and a positioning protrusion 12 is provided in the radial direction to position and support the cylinder body of the jaw cylinder, so that the cylinder body is kept on the axis of the forming mold, preventing the jaw cylinder from deflecting when the pipe wall is subjected to uneven force, thereby ensuring the smoothness of the pipe during stretching and the straightness after stretching, and at the same time preventing the jaw cylinder from being damaged due to deflection force.

[0027] In this embodiment, the fixed frame 1 includes two upright limiting plates 14 and a connecting plate 15 , the through hole 11 is opened on one of the limiting plates 14 , the abutting surface 13 is arranged on the other limiting plate 14 , and the connecting plate 15 connects the limiting plates 14 to each other.

[0028] The limit plate 14 on one side is used to support the tail of the cylinder, and the head of the cylinder passes through the limit plate 14 on the other side and is also clamped on the through hole 11, so as to limit the axial displacement of the cylinder, and then the limit plates 14 on both sides are connected to each other by a connecting plate 15 to improve the overall stability of the frame.

[0029] Preferably, a fastening ring 3 is sleeved in the through hole 11 , and a thread is provided on the ring surface of the fastening ring 3 for threaded connection with the inner wall of the through hole 11 .

[0030] The fastening ring 3 is inserted into the gap between the through hole 11 and the oil cylinder to fill the gap between the two so as to improve the clamping effect between the front limit plate 14 and the oil cylinder. In order to enhance the fastening effect of the fastening ring 3, a threaded connection is added between the fastening ring 3 and the inner wall of the through hole 11, so that the fastening ring 3 is not easily affected by the movement of the oil cylinder after being screwed into the through hole 11, thereby ensuring the stability of the oil cylinder in the through hole 11.

[0031] Preferably, an abutting retaining ring 31 is provided on the end surface of the fastening ring 3 outside the fixing frame 1 , and the abutting retaining ring 31 extends toward the center of the fastening ring 3 .

[0032] Not only is the fastening ring 3 required to fill the gap to prevent the oil cylinder from shaking, but a stop ring 31 is also required to be provided on the end face of the fastening ring 3 so that the piston rod of the oil cylinder passes through the inner ring of the stop ring 31, and the cylinder body is blocked in the fixed frame 1 by the stop ring 31. By tightening the fastening ring 3, the stop ring 31 pushes the cylinder body to abut against the limit plate 14 on the rear side, thereby realizing the adjustable tightness of the oil cylinder and facilitating the disassembly and replacement of the oil cylinder and the fixed frame 1.

[0033] Preferably, a buffer layer is provided on the inner wall of the fastening ring 3 , and a lever slot is provided on the outer wall of the fastening ring 3 , and the lever slot is arranged toward the axis of the fastening ring 3 .

[0034] The fastening ring 3 including the contact part with the cylinder body against the retaining ring 31 is covered with a buffer layer, which not only enables the fastening ring 3 to have a better locking effect on the cylinder body, but also prevents the cylinder body and the fastening ring 3 from colliding with each other during vibration.

[0035] An insertion hole is provided on the outer ring surface of the fastening ring 3, and a suitable tool is inserted into the lever slot. The fastening ring 3 is rotated by the labor-saving lever, so that the user can manually disassemble and replace the oil cylinder.

[0036] Preferably, a stopper slot 16 is formed on the limiting plate 14 . The stopper slot 16 is arranged concentrically with the through hole 11 , and the stopper surface 13 is arranged on the slot wall of the stopper slot 16 .

[0037] In order to keep the oil cylinder and the forming mold in a coaxial state, a groove of the same size is provided on the limit plate 14 against which the tail of the oil cylinder abuts so that the tail of the oil cylinder can be embedded therein.

[0038] Preferably, a screw hole is provided at the center of the circle of the slot 16 , and a bolt inserted from outside the fixing frame 1 is provided on the screw hole.

[0039] In order to further strengthen the fixation of the oil cylinder, a hole is opened in the center of the groove 16 so that the bolt can be inserted from outside the frame. At the same time, a threaded hole is also set at the tail of the cylinder body so that the bolt can be threadedly connected with the tail of the cylinder body through the small hole.

[0040] In this embodiment, the positioning protrusions 12 are arranged at the junction of the connecting plate 15 and the inner bottom surface of the fixed frame 1, and the distance from the contact end of each positioning protrusion 12 to the axis center line of the clamping cylinder accommodating chamber 2 is equal to the distance from the inner bottom surface of the fixed frame 1 to the axis center line of the clamping cylinder accommodating chamber 2.

[0041] A positioning protrusion 12 is also provided between the front and rear limit plates 14 to support the oil cylinder body. On the same transverse section, the two positioning protrusions 12 symmetrically fixed on the fixed frame 1 and the inner bottom surface of the fixed frame 1 together support the arc surface of the oil cylinder body, so that the suspended middle part of the cylinder body is supported by a stable three-point contact, preventing the cylinder body from bending under the action of gravity and affecting the movement of the piston rod.

[0042] In this embodiment, the outer bottom surface of the fixed frame 1 is provided with an insert support leg 17 , and the mid-perpendicular line of the insert support leg 17 passes through the axis line of the clamping jaw oil cylinder accommodating chamber 2 .

[0043] The plug-in support foot 17 will be clamped with the platform of the pusher trolley. A clamping groove that matches the plug-in support foot 17 is opened on the trolley platform. When the fixed frame 1 is placed on the trolley platform, bolts are used to tighten the plug-in support foot 17 from both sides.

[0044] In order to avoid torque generated by the fixed frame 1, the support center of gravity of the plug-in support foot 17 is aligned with the axis of the clamping jaw cylinder accommodating chamber 2 so that the two are on the same vertical line.

[0045] In this embodiment, a heat dissipation skylight is provided on the top of the fixed frame 1. Oil and air will generate heat when compressed, and the oil cylinder will generate a lot of heat during repeated compression. Therefore, it is beneficial to the heat dissipation of the oil cylinder to open the top of the fixed frame 1 to avoid heat accumulation in a closed environment and increase the friction loss of the cylinder body.

[0046] The specific embodiments described herein are merely examples of the spirit of the present invention. Those skilled in the art may make various modifications or additions to the specific embodiments described or replace them in similar ways, but they will not deviate from the spirit of the present invention or exceed the scope defined by the appended claims.

Claims

1. A cold drawing machine jaw oil cylinder fixing device, comprising a fixing frame (1), characterized in that: The fixed frame (1) is provided with a clamping cylinder accommodating chamber (2) inside, and the clamping cylinder accommodating chamber (2) vertically penetrates the outside from a through hole (11) opened on one of the vertical surfaces of the fixed frame (1). The fixed frame (1) is also provided with a plurality of positioning protrusions (12), and the positioning protrusions (12) are arranged toward the axis of the clamping cylinder accommodating chamber (2). A supporting surface (13) is provided on the vertical surface on the opposite side of the through hole (11).

2. The cold drawing machine clamping cylinder fixing device according to claim 1 is characterized in that: The fixed frame (1) comprises two upright limiting plates (14) and a connecting plate (15); the through hole (11) is provided on one of the limiting plates (14); the abutting surface (13) is provided on the other limiting plate (14); and the connecting plate (15) connects the limiting plates (14) to each other.

3. The cold drawing machine clamping cylinder fixing device according to claim 2 is characterized in that: A fastening ring (3) is sleeved in the through hole (11), and a thread is provided on the ring surface of the fastening ring (3) for threaded connection with the inner wall of the through hole (11).

4. The cold drawing machine clamping cylinder fixing device according to claim 3 is characterized in that: The fastening ring (3) is provided with a stop ring (31) on the end surface outside the fixing frame (1), and the stop ring (31) extends towards the center of the fastening ring (3).

5. The cold drawing machine clamping cylinder fixing device according to claim 3 is characterized in that: A buffer layer is provided on the inner wall of the fastening ring (3), and a lever slot is provided on the outer wall of the fastening ring (3), wherein the lever slot is arranged towards the axis of the fastening ring (3).

6. The cold drawing machine clamping cylinder fixing device according to claim 2, characterized in that: The limiting plate (14) is provided with a supporting groove (16), the supporting groove (16) is arranged concentrically with the through hole (11), and the supporting surface (13) is arranged on the groove wall of the supporting groove (16).

7. The cold drawing machine clamping cylinder fixing device according to claim 6 is characterized in that: A screw hole is provided at the center of the circle of the abutting slot (16), and a bolt inserted from outside the fixing frame (1) is provided on the screw hole.

8. The cold drawing machine clamping cylinder fixing device according to claim 2 is characterized in that: The positioning protrusions (12) are arranged at the junction of the connecting plate (15) and the inner bottom surface of the fixed frame (1), and the distance from the contact end of each positioning protrusion (12) to the axis center line of the clamping cylinder accommodating chamber (2) is equal to the distance from the inner bottom surface of the fixed frame (1) to the axis center line of the clamping cylinder accommodating chamber (2).

9. The cold drawing machine clamping cylinder fixing device according to claim 1, characterized in that: The outer bottom surface of the fixed frame (1) is provided with a plug-in support foot (17), and the mid-vertical line of the plug-in support foot (17) passes through the axis center line of the clamping jaw oil cylinder accommodating chamber (2).

10. The cold drawing machine clamping cylinder fixing device according to claim 1, characterized in that: A heat dissipation skylight is provided on the top of the fixed frame (1).

Images