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CN-224223443-U - Centre hole grinding machine

CN224223443UCN 224223443 UCN224223443 UCN 224223443UCN-224223443-U

Abstract

The utility model relates to the field of grinding machines, in particular to a center hole grinding machine, which comprises a grinding machine frame, wherein a first guide rail is vertically arranged on the front side surface of the grinding machine frame, a tailstock device is in sliding fit with the bottom of the first guide rail, a three-center clamping unit is combined with a fine adjustment structure of a push rod locking rod sleeve and a screw rod, quick clamping and high-precision adjustment are supported, a center rod is fixed through a ball locking mechanism, the clamping force is ensured to be stable in the machining process, workpiece deflection is avoided, the flexible and stable clamping is effectively improved, the sliding friction is converted into rolling friction by a roller row arranged between a cross beam and a second sliding block, the guide rail resistance is greatly reduced, the movement precision and bearing capacity of a grinding head part are improved, the service life of the guide rail is prolonged, an eccentric wheel adjusting mechanism is linked with a chain adjusting mechanism, the accurate deflection of 1-3 DEG of the grinding head position is realized through motor driving, the balance of a balancing weight is matched with the tension of a transmission chain, the fine adjustment process is ensured to be stable and high-efficiency, and the high-precision machining requirement is met.

Inventors

  • GAO YUAN
  • XU FENG
  • SHAO HONGWEI
  • LI CHENYAO

Assignees

  • 常州德进自动化设备有限公司

Dates

Publication Date
20260512
Application Date
20250603

Claims (9)

  1. 1. The center hole grinding machine comprises a grinding machine frame (01) and is characterized in that a first guide rail (02) is vertically arranged on the front side surface of the grinding machine frame (01), a tailstock device (03) is slidably matched with the bottom of the first guide rail (02), a three-center clamping unit (04) is slidably matched with the first guide rail (02) and positioned above the tailstock device (03), a cross beam (010) is transversely arranged on the front side surface of the grinding machine frame (01) and positioned above the first guide rail (02), a second slider (011) is transversely slidably matched with the cross beam (010), a rotary disc guide rail (012) is arranged on the second slider (011), a rotary disc sliding seat (013) is slidably matched with the rotary disc guide rail (012), and a grinding head component (05) is arranged on the rotary disc sliding seat (013); A trimming mechanism (09) is arranged at the bottom of the second sliding block (011), a screw rod mechanism (014) is rotatably arranged in the frame body of the grinding machine frame (01) and positioned on the back surface of the cross beam (010), a spline shaft mechanism (015) is rotatably arranged below the screw rod mechanism (014), a motor (5) is arranged on a plate body positioned on one side of the spline shaft mechanism (015) and in the frame body of the grinding machine frame (01), and an eccentric wheel adjusting mechanism (06) is assembled at the output end of the motor (5); The three-center clamping unit (04) comprises a first sliding block (07), an upper center frame (08), a movable clamping ring (1), a mandrel locking rod sleeve (2) and a mandrel limiting mechanism (3), wherein the first sliding block (07) is vertically and slidably matched with the first guide rail (02), the upper center frame (08) is vertically arranged on the movable clamping ring (1), the upper center frame (08) is used for being matched with a tail frame device (03), the mandrel locking rod sleeve (2) is uniformly and horizontally distributed on the movable clamping ring (1), and the mandrel limiting mechanism (3) is arranged at the bottom of the movable clamping ring (1) and below the mandrel locking rod sleeve (2); The eccentric wheel adjusting mechanism (06) comprises an eccentric wheel assembly (7) and a connecting rod (8), wherein the eccentric wheel assembly (7) is assembled at the output end of the motor (5), one end rod body of the connecting rod (8) is in sliding fit with the eccentric wheel assembly (7), and the other end of the connecting rod is rotationally connected to the spline shaft mechanism (015).
  2. 2. The center hole grinding machine according to claim 1, wherein the movable snap ring (1) is installed at the front side surface of the first sliding block (07), a plurality of limit grooves (21) are formed in the bottom of the outer wall of the ejector rod locking rod sleeve (2) in a transversely uniform arrangement mode, the limit grooves (21) are used for being clamped by the ejector rod limit mechanism (3), a top rod (22) is slidably matched inside the ejector rod locking rod sleeve (2), a top tip (221) for clamping a workpiece is arranged at one end of the top rod (22), a first screw hole (222) is formed in the other end of the top rod, a screw rod (23) is in spiral fit at the first screw hole (222), and the screw rod (23) is rotatably arranged inside the ejector rod locking rod sleeve (2).
  3. 3. The center hole grinding machine according to claim 2, wherein a threaded portion (231) for being in threaded fit with the first threaded hole (222) is arranged on the outer portion of a rod body at one end of the screw rod (23), a second threaded hole (232) is formed in the other end of the screw rod, a screw (24) is in threaded fit with the second threaded hole (232), the screw (24) is located at the end of the ejector rod locking rod sleeve (2) on the other side, far away from the top tip (221), of the ejector rod locking rod sleeve, a ball movable hole (233) is formed in the screw rod (23) in communication with the other end, far away from an inlet of the mounting screw (24), of the second threaded hole (232), balls (25) are in sliding fit with the ball movable hole (233), and the end tip of the screw (24) is used for propping against the balls (25).
  4. 4. The center hole grinding machine according to claim 2, wherein the ejector rod limiting mechanism (3) comprises a limiting mechanism mounting block (31), the limiting mechanism mounting block (31) is mounted at the bottom of the movable clamping ring (1), a through hole for sliding of the push rod (32) is formed in the limiting mechanism mounting block (31), a limiting clamping block (34) is arranged at the top of the push rod (32), the limiting clamping block (34) penetrates through the movable clamping ring (1) to clamp the limiting groove (21), a spring (33) is arranged on the rod body of the push rod (32), the top of the spring (33) abuts against the limiting clamping block (34), and the bottom of the spring (33) abuts against the bottom end of the push rod (32).
  5. 5. The center hole grinding machine according to claim 1, wherein the front side surface of the cross beam (010) is provided with a second guide rail (0101) symmetrically up and down, a second slider (011) is transversely slidingly fitted at the second guide rail (0101), the second slider (011) includes a slide seat (0111), and a turntable guide rail mounting portion (0112) is provided at the front side surface of the slide seat (0111).
  6. 6. The center hole grinding machine according to claim 5, wherein the rotary disc guide rail mounting portion (0112) is used for mounting the rotary disc guide rail (012), a third guide rail (0113) is symmetrically arranged on the position, away from the rotary disc guide rail mounting portion (0112), of the sliding seat (0111), on the other side surface of the rotary disc guide rail mounting portion (0112), the third guide rail (0113) is used for being matched with the second guide rail (0101), and roller rows (4) are arranged between the third guide rail (0113) and the second guide rail (0101).
  7. 7. The center hole grinding machine according to claim 1, wherein a mounting groove (013) is formed in the bottom of the rotary disc sliding seat (013), a chain adjusting mechanism (6) is connected to the mounting groove (0131), a movable hole (0121) is formed in the middle of the rotary disc guide rail (012), the movable hole (0121) is used for enabling the chain adjusting mechanism (6) to move, a first sprocket (0122) is rotationally arranged in the movable hole (0121), the first sprocket (0122) is matched with the chain adjusting mechanism (6) to drive, a second sprocket (0152) is rotationally arranged on the shaft body of the spline shaft mechanism (015) on the same plane as the first sprocket (0122), the second sprocket (0152) is used for being matched with the chain adjusting mechanism (6) to drive, a connecting disc (0151) is arranged on one side of the shaft body of the spline shaft mechanism (015) on the second sprocket (0152), and the connecting disc (0151) is used for being connected with the connecting rod (8).
  8. 8. The center hole grinding machine according to claim 7, wherein the chain adjusting mechanism (6) comprises a second chain (63), one end of the second chain (63) is provided with a sliding seat connector (632) for being installed at the installation groove (0131), the other end of the second chain (63) is connected with a shaft sleeve (631), a bearing rotating head (611) is rotatably arranged in the shaft sleeve (631), and one end of the bearing rotating head (611) far away from the second chain (63) is connected with a first chain (61); The second chain (63) is meshed with the tooth form of the first chain wheel (0122), the first chain (61) is meshed with the tooth form of the second chain wheel (0152), the other end, far away from the bearing rotating head (611), of the first chain (61) is connected with a balancing weight (62), and the balancing weight (62) is suspended below the second chain wheel (0152).
  9. 9. The center hole grinding machine according to claim 1, wherein the eccentric wheel assembly (7) comprises a connecting shaft (71), one end shaft body of the connecting shaft (71) is assembled and connected to the output end of the motor (5), a sliding block (72) is sleeved on the other end shaft body of the connecting shaft (71), an eccentric wheel (73) is slidably matched with the sliding block (72), a sliding cavity (731) for slidably matching the sliding block (72) is formed in the eccentric wheel (73), a bearing (74) is sleeved on the outer wall of the eccentric wheel (73), a mounting ring (75) is sleeved outside the bearing (74), a sliding hole (751) is formed in the outer wall of the mounting ring (75), and a connecting rod (8) is slidably matched with the sliding hole (751).

Description

Centre hole grinding machine Technical Field The utility model relates to the technical field of grinding machines, in particular to a center hole grinding machine. Background At present, the machining mode of the center hole mainly comprises two modes, namely scraping and grinding the center hole through a multi-edge center and a center, the mode is low in machining precision of the center hole, low in success rate, time-consuming, labor-consuming and low in working efficiency, and the other machining mode is that the center hole is machined through a center hole grinding machine. The existing center hole grinder clamping device adopts a fixed center structure, the adjusting range is limited, the machining requirements of workpieces with different sizes are difficult to adapt to, manual operation is complex, accurate fine adjustment is difficult to achieve, the traditional guide rail of the center hole grinder adopts a sliding friction design, large resistance is easy to generate under high-load or high-speed working conditions, the motion precision is reduced, the abrasion is aggravated, the service life of equipment is influenced, the grinding head component is also dependent on mechanical transmission during machining, the adjusting precision is insufficient, and fine adjustment during high-precision machining is difficult to meet. Disclosure of utility model The utility model aims to solve the defects in the prior art and provides a center hole grinding machine. In order to achieve the above purpose, the present utility model adopts the following technical scheme: The center hole grinding machine comprises a grinding machine frame, a first guide rail is vertically arranged on the front side surface of the grinding machine frame, a tailstock device is slidably matched at the bottom of the first guide rail, a three-center clamping unit is slidably matched on the first guide rail and above the tailstock device, a cross beam is transversely arranged on the front side surface of the grinding machine frame and above the first guide rail, a second sliding block is transversely slidably matched on the cross beam, a rotary disc guide rail is arranged on the second sliding block, a rotary disc sliding seat is slidably matched on the rotary disc guide rail, and a grinding head component is arranged on the rotary disc sliding seat; The bottom of the second sliding block is provided with a trimming mechanism, a screw rod mechanism is rotatably arranged in the grinder frame body and positioned on the back surface of the cross beam, a spline shaft mechanism is rotatably arranged below the screw rod mechanism in a matched manner, a motor is arranged on a plate body positioned on one side of the spline shaft mechanism and positioned in the grinder frame body, and an eccentric wheel adjusting mechanism is assembled at the output end of the motor; The three-center clamping unit comprises a first sliding block, an upper center frame, a movable clamping ring, a push rod locking rod sleeve and a push rod limiting mechanism, wherein the first sliding block is vertically in sliding fit on a first guide rail, the movable clamping ring is vertically provided with the upper center frame which is used for being matched with a tail frame device, the push rod locking rod sleeve is uniformly arranged and horizontally distributed on the movable clamping ring, and the push rod limiting mechanism is arranged at the bottom of the movable clamping ring and below the push rod locking rod sleeve; The eccentric wheel adjusting mechanism comprises an eccentric wheel assembly and a connecting rod, wherein the eccentric wheel assembly is assembled on the output end of the motor, one end of the connecting rod is in sliding fit with the eccentric wheel assembly, and the other end of the connecting rod is rotationally connected to the spline shaft mechanism. In addition, the preferred structure is, movable snap ring installs in first slider front side surface department, and a plurality of spacing recesses have been seted up along horizontal even arrangement to the bottom of ejector pin locking bar cover outer wall, and spacing recess is used for being blocked by ejector pin stop gear, and inside sliding fit of ejector pin locking bar cover has a top pole, and top pole one end is provided with the top point that is used for clamping the work piece, and first screw has been seted up to the other end, and first screw department screw fit has the screw rod, and the screw rod rotates the setting in ejector pin locking bar cover inside. In addition, the preferred structure is, be provided with on the body of rod outside of screw rod one end body of rod be used for with first screw complex screw portion, the second screw has been seted up to the other end, second screw department screw complex has the screw, the screw is located ejector pin locking bar cover and keeps away from the opposite side end department of top end, the screw rod is located the o