A double-chamber oil quenching vacuum furnace for die heat treatment

Abstract

The present invention relates to a double-chamber oil quenching vacuum furnace for die heat treatment, which comprises a machine base. A furnace body is fixed above the machine base. An outer-thread connecting sleeve is fixedly sleeved at the furnace opening of the furnace body. A circular ring-shaped retaining ring is formed at the front end of the outer-thread connecting sleeve. A furnace cover covering the furnace opening abuts against the front end face of the retaining ring. The furnace cover is hinged to the outer wall of the furnace body through a transverse moving bracket. A plurality of fan-shaped notches are formed in the outer ring of the furnace cover, and fan-shaped limiting baffles are formed between adjacent notches. An L-shaped locking sleeve is screwed on the outer-thread connecting sleeve. The locking sleeve is inserted into the retaining ring and the furnace cover. The front end of the locking sleeve extends out of the furnace cover and is formed with a plurality of pressing plates opposite to the limiting baffles on the furnace cover. The pressing plates press against the front end faces of the limiting baffles. The double-chamber oil quenching vacuum furnace optimizes and rectifies the locking sleeve structure at the furnace opening part, can meet the closing and locking of the furnace cover of the oil quenching vacuum furnace, and can facilitate the opening of the furnace cover.

Description

Technical Field:

[0001] The present invention relates to the technical field of oil quenching vacuum furnaces, and more specifically to a double-chamber oil quenching vacuum furnace for die heat treatment. Background Art:

[0002] During the die processing, quenching is required. Some dies are quenched and heat-treated using a double-chamber oil quenching vacuum furnace, which is also called a double-chamber vacuum oil quenching and gas cooling furnace. It is mainly applicable to bright quenching, bright annealing, and vacuum brazing of materials such as alloy steel, alloy tool steel, die steel, high-speed steel, bearing steel, and stainless steel. Currently, the common double-chamber oil quenching vacuum furnace is a horizontal oil quenching vacuum furnace. Its furnace body is cylindrical, and the furnace mouth of the furnace body is hinged with a furnace cover. The furnace cover and the furnace mouth of the furnace body are provided with an annular locking sleeve. Several pressing plates are formed on the locking sleeve, and a notch through which the pressing plate can pass is formed on the outer ring of the furnace cover. By rotating the locking sleeve, the pressing plate moves and is misaligned with the notch, and the pressing plate can be pressed against the furnace cover to achieve locking and limiting; when opening the cover, although the pressing plate can be driven to face the notch on the furnace cover, during the previous cover closing process, the furnace cover is pressed against the furnace mouth of the furnace body, and the furnace cover and the furnace mouth of the furnace body are sucked together, making it rather difficult to open the furnace cover by pulling the handle; therefore, a structure that facilitates the opening of the furnace cover needs to be designed. Summary of the Invention:

[0003] The purpose of the present invention is to address the deficiencies of the prior art and provide a double-chamber oil quenching vacuum furnace for die heat treatment, which can meet the closing and locking of the furnace cover of the oil quenching vacuum furnace and facilitate the opening of the furnace cover.

[0004] A double-chamber oil quenching vacuum furnace for die heat treatment includes a machine base. A furnace body is fixed above the machine base. An externally threaded connecting sleeve is fixedly inserted into the furnace mouth of the furnace body. A circular ring-shaped retaining ring is formed at the front end of the externally threaded connecting sleeve. A furnace cover covering the furnace mouth abuts against the front end face of the retaining ring. The furnace cover is hinged to the outer wall of the furnace body through a transverse movement support. A plurality of fan-shaped notches are formed on the outer ring of the furnace cover, and fan-shaped limiting baffles are formed between adjacent notches; An L-shaped locking sleeve is screwed onto the externally threaded connecting sleeve. The locking sleeve is inserted between the retaining ring and the furnace cover. The front end of the locking sleeve extends out of the furnace cover and forms a plurality of pressing plates opposite to the limiting baffles on the furnace cover. The pressing plates are pressed against the front end face of the limiting baffles.

[0005] Two sets of locking execution components with opposite directions are respectively connected to the outer walls on the upper and lower sides of the locking sleeve. The locking execution components are fixed on the furnace body; A handle is fixed on the side wall of the furnace cover far from the transverse movement support. A longitudinal positioning hole is formed on the retaining ring close to the handle. An opening device is inserted into the positioning hole. The opening device includes a top material column. First ball bearings are respectively embedded at the front and rear ends of the top material column. The first ball bearing at the front end of the top material column abuts against the limiting baffle of the furnace cover, and the first ball bearing at the rear end of the top material column extends out of the rear end face of the retaining ring.

[0006] Preferably, a convex portion that protrudes forward and is spherical is formed in the middle of the furnace cover.

[0007] Preferably, the transverse movement support bracket includes an L-shaped fixed bracket and a transverse moving support arm. A connecting frame is provided between the moving support arm and the fixed bracket. The rear end of the fixed bracket passes through an externally threaded connecting sleeve and is fixed on the furnace body. The front end of the fixed bracket is located on one side of the locking sleeve and is formed with a socket. The moving support arm is located on the front side of the locking sleeve. One end of the moving support arm is fixed on the convex portion of the furnace cover, and an opening is formed at the other end of the moving support arm. Both ends of the connecting frame are respectively inserted into the socket of the fixed bracket and the opening of the moving support arm and are respectively inserted with pin shafts. Both ends of the pin shaft are respectively inserted and fixed on the fixed bracket and the moving support arm.

[0008] Preferably, the diameter of the outer wall of the retaining ring is equal to the diameter of the outer ring of the furnace cover, and the diameter of the outer ring of the furnace cover is equal to the inner diameter of the locking sleeve; the number of upper pressing plates on the locking sleeve is equal to the number of limiting baffles. The limiting baffles and the pressing plates are evenly distributed in a ring around the central axis of the furnace cover. The length of the pressing plate is less than the slot width of the slot on the furnace cover.

[0009] Preferably, the locking execution assembly includes a cylinder. An ear is formed at the end of the cylinder block. A T-shaped first positioning pin is inserted on the ear of the cylinder. A fixed ear seat is inserted and fixed at the end of the first positioning pin. The fixed ear seat is fixed on the furnace body. A bushing is formed on the piston rod of the cylinder. A T-shaped second positioning pin is inserted on the bushing. A moving ear seat is inserted and fixed at the end of the second positioning pin. The moving ear seat is fixed on the outer wall of the locking sleeve.

[0010] Preferably, the moving ear seat on the upper side of the locking sleeve is located on the left side of the cylinder on the upper side of the locking sleeve, and the moving ear seat on the lower side of the locking sleeve is located on the right side of the cylinder on the lower side of the locking sleeve. The length of the second positioning pin is greater than the sum of the thicknesses of the moving ear seat and the bushing.

[0011] Preferably, a second ball is embedded on the front end face of the limiting baffle of the furnace cover, and the second ball presses against the rear end face of the pressing plate.

[0012] The beneficial effects of the present invention are as follows:

[0013] This double-chamber oil quenching vacuum furnace optimizes and rectifies the structure of the locking sleeve at the furnace opening part, can meet the closing and locking of the furnace cover of the oil quenching vacuum furnace, and can facilitate the opening of the furnace cover. Description of the drawings:

[0014] Figure 1 is a three-dimensional structural schematic diagram of the present invention;

[0015] Figure 2 is a front structural schematic diagram of the present invention;

[0016] Figure 3 isFigure 2 Rotary sectional view at A-A in the figure;

[0017] Figure 4 is Figure 3 Partial enlarged view at B in the figure.

[0018] In the figure: 1. Machine base; 2. Furnace body; 3. Outer threaded coupling; 31. Retaining ring; 32. Positioning hole; 4. Furnace cover; 41. Notch; 42. Limit baffle; 5. Transverse movement support; 51. Fixed support; 52. Moving support arm; 53. Connecting frame; 6. Locking sleeve; 61. Rotating head; 54. First hinge support; 55. Hook; 6. Linkage frame; 61. Pressure plate; 7. Locking execution component; 71. Positioning pin; 72. Moving ear seat; 73. Second positioning pin; 74. Fixed ear seat; 75. First positioning pin; 8. Handle; 9. Furnace cover opener; 91. Ejector pin; 92. First ball; 10. Second ball. Specific implementation method:

[0019] Example: See Figure 1 、 2 As shown, a double-chamber oil quenching vacuum furnace for die heat treatment includes a machine base 1, a furnace body 2 is fixed above the machine base 1, an outer threaded coupling 3 is fixedly sleeved at the furnace opening of the furnace body 2, a circular retaining ring 31 is formed at the front end of the outer threaded coupling 3, a furnace cover 4 covering the furnace opening abuts against the front end face of the retaining ring 31, and the furnace cover 4 is hinged to the outer wall of the furnace body 2 through a transverse movement support 5. A plurality of fan-shaped notches 41 are formed on the outer ring of the furnace cover 4, and fan-shaped limit baffles 42 are formed between adjacent notches 41; A locking sleeve 6 with an L-shaped cross-section is screwed on the outer threaded coupling 3, the locking sleeve 6 is inserted on the retaining ring 31 and the furnace cover 4, the front end of the locking sleeve 6 extends out of the furnace cover 4 and forms a plurality of pressure plates 61 opposite to the limit baffles 42 on the furnace cover 4, and the pressure plates 61 are pressed against the front end face of the limit baffles 42.

[0020] See Figure 3 、 4 As shown, two sets of locking execution components 7 with opposite directions are respectively connected to the outer walls on the upper and lower sides of the locking sleeve 6, and the locking execution components 7 are fixed on the furnace body 2; A handle 8 is fixed on the side wall of the furnace cover 4 far from the transverse movement support 5, a longitudinal positioning hole 32 is formed on the retaining ring 31 close to the handle 8, an opener 9 is inserted into the positioning hole 32, the opener 9 includes an ejector pin 91, first balls 92 are respectively embedded at the front and rear ends of the ejector pin 91, the first ball 92 at the front end of the ejector pin 91 abuts against the limit baffle 42 of the furnace cover 4, and the first ball 92 at the rear end of the ejector pin 91 extends out of the rear end face of the retaining ring 31.

[0021] See Figure 1 As shown, a convex portion protruding forward and having a spherical shape is formed in the middle of the furnace cover 4.

[0022] As shown Figure 1 in Figure 1 , the transverse moving bracket 5 includes an L-shaped fixed bracket 51 and a transverse moving support arm 52. A connecting frame 53 is provided between the moving support arm 52 and the fixed bracket 51. The rear end of the fixed bracket 51 passes through the externally threaded connecting sleeve 3 and is fixed on the furnace body 2. The front end of the fixed bracket 51 is located on one side of the locking sleeve 6 and is formed with a socket. The moving support arm 52 is located in front of the locking sleeve 6. One end of the moving support arm 52 is fixed on the convex part of the furnace cover 4, and the other end of the moving support arm 52 is formed with an opening. Both ends of the connecting frame 53 are respectively inserted into the socket of the fixed bracket 51 and the opening of the moving support arm 52 and are respectively inserted with pin shafts. Both ends of the pin shafts are respectively inserted and fixed on the fixed bracket 51 and the moving support arm 52.

[0023] As shown Figure 2 , 3 in Figure 2 , the diameter of the outer wall of the retaining ring 31 is equal to the diameter of the outer ring of the furnace cover 4, and the diameter of the outer ring of the furnace cover 4 is equal to the diameter of the inner wall of the locking sleeve 6; the number of pressing plates 61 on the locking sleeve 6 is equal to the number of limiting baffles 42. The limiting baffles 42 and the pressing plates 61 are both evenly distributed in a ring around the central axis of the furnace cover 4. The length of the pressing plate 61 is less than the slot width of the slot 41 on the furnace cover 4. When the pressing plate 61 falls at the slot 41 of the furnace cover 4, the pressing plate 61 can pass through the slot 41 of the furnace cover 4, so that the separation of the furnace cover 4 from the locking sleeve 6 and the opening of the furnace cover 4 can be realized.

[0024] As shown Figure 1 in Figure 1 , the locking execution assembly 7 includes a cylinder 71. An ear is formed at the end of the cylinder block of the cylinder 71. A T-shaped first positioning pin 75 is inserted on the ear of the cylinder 71. A fixed ear seat 74 is inserted and fixed at the end of the first positioning pin 75. The fixed ear seat 74 is fixed on the furnace body 2. A shaft sleeve is formed on the piston rod of the cylinder 71. A T-shaped second positioning pin 73 is inserted on the shaft sleeve. A moving ear seat 72 is inserted and fixed at the end of the second positioning pin 73. The moving ear seat 72 is fixed on the outer wall of the locking sleeve 6.

[0025] As shown Figure 1 in Figure 1 , the moving ear seat 73 on the upper side of the locking sleeve 6 is located on the left side of the cylinder 71 on the upper side of the locking sleeve 6, and the moving ear seat 73 on the lower side of the locking sleeve 6 is located on the right side of the cylinder 71 on the lower side of the locking sleeve 6. The length of the second positioning pin 75 is greater than the sum of the thicknesses of the moving ear seat 73 and the shaft sleeve.

[0026] As shown Figure 4 in Figure 4 , the second ball 10 is embedded on the front end face of the limiting baffle 42 of the furnace cover 4, and the second ball 10 is pressed against the rear end face of the pressing plate 61.

[0027] Working principle: The present invention is a double-chamber oil quenching vacuum furnace for die heat treatment. The main technical point of the double-chamber oil quenching vacuum furnace is reflected in the locking sleeve 6. The locking sleeve 6 is installed on the external thread connecting sleeve 3 by means of a threaded connection. When the locking sleeve 6 rotates to lock the furnace cover 4, the locking sleeve 6 can move towards the rear end of the furnace body 2, so that the pressure plate 61 presses on the furnace cover 4;

[0028] When the furnace cover 4 is opened, the locking sleeve 6 rotates to align the pressure plate 61 with the notch 41. At the same time, the locking sleeve 6 will move forward. The forward-moving locking sleeve 6 will act on the cover opener 9, driving the cover opener 9 to move forward. Then the cover opener 9 will push open the furnace cover 4, and the furnace cover 4 will be attracted to the oil quenching vacuum furnace, facilitating the subsequent opening of the furnace cover 4 by holding the handle 8.

[0029] The described embodiments are used to illustrate the present invention by way of example, rather than to limit the present invention. Any person skilled in the art can modify the described embodiments without departing from the spirit and scope of the present invention. Therefore, the scope of the protection of the rights of the present invention shall be as set forth in the claims of the present invention.

Claims

1. A double-chamber oil quenching vacuum furnace for die heat treatment, comprising a machine base (1), and a furnace body (2) is fixed above the machine base (1), and is characterized in that: An outer threaded connecting sleeve (3) is fixed to the furnace mouth socket of the furnace body (2). A circular ring-shaped retaining ring (31) is formed at the front end of the outer threaded connecting sleeve (3). A furnace cover (4) covering the furnace mouth abuts against the front end face of the retaining ring (31). The furnace cover (4) is hinged to the outer wall of the furnace body (2) through a transverse movement support (5). A plurality of fan-shaped notches (41) are formed in the outer ring of the furnace cover (4), and fan-shaped limiting baffles (42) are formed between adjacent notches (41). A locking sleeve (6) with an L-shaped cross-section is screwed onto the outer threaded connecting sleeve (3). The locking sleeve (6) is inserted onto the retaining ring (31) and the furnace cover (4). The front end of the locking sleeve (6) extends out of the furnace cover (4) and is formed with a plurality of pressing plates (61) opposite to the limiting baffles (42) on the furnace cover (4). The pressing plates (61) press against the front end face of the limiting baffles (42). Two groups of locking execution components (7) with opposite directions are respectively connected to the outer walls on the upper and lower sides of the locking sleeve (6). The locking execution components (7) are fixed to the furnace body (2). A handle (8) is fixed to one side wall of the furnace cover (4) away from the transverse movement support (5). A longitudinal positioning hole (32) is formed in the retaining ring (31) close to the handle (8). An opening device (9) is inserted into the positioning hole (32). The opening device (9) includes a ejector rod (91). First balls (92) are respectively embedded at the front and rear ends of the ejector rod (91). The first ball (92) at the front end of the ejector rod (91) abuts against the limiting baffle (42) of the furnace cover (4). The first ball (92) at the rear end of the ejector rod (91) extends out of the rear end face of the retaining ring (31). The locking execution component (7) includes a cylinder (71). An ear is formed at the end of the cylinder block of the cylinder (71). A T-shaped first positioning pin (75) is inserted into the ear of the cylinder (71). A fixed ear seat (74) is inserted and fixed at the end of the first positioning pin (75). The fixed ear seat (74) is fixed to the furnace body (2). A shaft sleeve is formed on the piston rod of the cylinder (71). A T-shaped second positioning pin (73) is inserted into the shaft sleeve. A moving ear seat (72) is inserted and fixed at the end of the second positioning pin (73). The moving ear seat (72) is fixed to the outer wall of the locking sleeve (6). The moving ear seat (72) on the upper side of the locking sleeve (6) is located on the left side of the cylinder (71) on the upper side of the locking sleeve (6). The moving ear seat (72) on the lower side of the locking sleeve (6) is located on the right side of the cylinder (71) on the lower side of the locking sleeve (6). The length of the second positioning pin (73) is greater than the sum of the thicknesses of the moving ear seat (72) and the shaft sleeve.

2. The double-chamber oil quenching vacuum furnace for die heat treatment according to claim 1, characterized in that: A convex portion that protrudes forward and is spherical is formed in the middle of the furnace cover (4).

3. A double-chamber oil quenching vacuum furnace for die heat treatment according to claim 2, characterized in that: The described transverse moving support (5) includes an L-shaped fixed support (51) and a transverse moving support arm (52). A connecting frame (53) is provided between the moving support arm (52) and the fixed support (51). The rear end of the fixed support (51) passes through an externally threaded connecting sleeve (3) and is fixed on the furnace body (2). The front end of the fixed support (51) is located on one side of the locking sleeve (6) and is formed with a socket. The moving support arm (52) is located on the front side of the locking sleeve (6). One end of the moving support arm (52) is fixed on the convex portion of the furnace cover (4). The other end of the moving support arm (52) is formed with an opening. Both ends of the connecting frame (53) are respectively inserted into the socket of the fixed support (51) and the opening of the moving support arm (52) and are respectively inserted with pin shafts. Both ends of the pin shafts are respectively inserted and fixed on the fixed support (51) and the moving support arm (52).

4. A double-chamber oil quenching vacuum furnace for die heat treatment according to claim 1, characterized in that: The diameter of the outer wall of the retaining ring (31) is equal to the diameter of the outer ring of the furnace cover (4), and the diameter of the outer ring of the furnace cover (4) is equal to the diameter of the inner wall of the locking sleeve (6); the number of pressing plates (61) on the locking sleeve (6) is equal to the number of limiting baffles (42). The limiting baffles (42) and the pressing plates (61) are both evenly distributed in a ring around the central axis of the furnace cover (4). The length of the pressing plate (61) is less than the groove width of the notch (41) on the furnace cover (4).

5. A double-chamber oil quenching vacuum furnace for die heat treatment according to claim 1, characterized in that: The second ball (10) is embedded on the front end face of the limiting baffle (42) of the furnace cover (4), and the second ball (10) is pressed against the rear end face of the pressing plate (61).

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